various updates i've left uncommitted for many months

- rename standard integer types to a more familiar (u)int(8/16/32)
- many function/struct renames. i don't _really_ know if what i've done
  for this is better, but it "feels" better to me. many draw/blit
  function names are shorter which is nice, at least. kinda important
  to me because i develop this on a real DOS machine in 80x50 text mode.
- add 'extern "C"' blocks to headers for C++ compiler usage
- draw/pixel color value arguments for functions should all have been
  changed to be uint8 instead of a full 32-bit int. feels right, but
  maybe should've left alone...
- small fix to keyboard handler. noticed a problem on one thinkpad
  laptop. was a result of what i think was a typo in a constant value
  used during the part of the interrupt handler that tells the keyboard
  controller the key event was processed
- fix uncommon potential crash function return in draw_filled_rect
- renamed low-level "direct" assembly functions to "lowlevel_xxx" to
  be a little bit more explicit about what they are
- add some convenience event helper functions for determining event
  types
- add fixed point atan2
- fixed some tabs/spaces inconsistences (should all be spaces now?)
- maybe some other minor things i've forgotten

DGL.C

@@ -2,7 +2,7 @@
 #include "dglkbrd.h"
 #include "dglmouse.h"
 #include "dglgfx.h"
-#include "dglutil.h"
+#include "dglevent.h"
 #include <stdlib.h>
 
 static DGL_ERROR _last_error = DGL_NONE;
@@ -60,14 +60,14 @@ void dgl_set_error(DGL_ERROR error) {
     _last_error = error;
 }
 
-void _dgl_atexit(void) {
+void dgl_init(void) {
+    atexit(dgl_close);
+}
+
+void dgl_close(void) {
     events_shutdown();
     mouse_shutdown();
     keyboard_shutdown();
-    video_shutdown();
-}
-
-void dgl_init(void) {
-    atexit(_dgl_atexit);
+    gfx_shutdown();
 }
 

DGL.H

@@ -1,26 +1,41 @@
-#ifndef DGL_DGL_H_INCLUDED
-#define DGL_DGL_H_INCLUDED
+#ifndef LIBDGL_DGL_H
+#define LIBDGL_DGL_H
 
-#include "dglcmn.h"
-#include "dglerror.h"
-
-#include "dglkbrd.h"
-#include "dglmouse.h"
-#include "dglgfx.h"
-#include "dglpal.h"
-#include "dglclip.h"
-#include "dgldraw.h"
-#include "dglblit.h"
-#include "dglmath.h"
-#include "dglfixp.h"
-#include "dglrect.h"
-#include "dglvec2.h"
-#include "dglmtx33.h"
-#include "dglutil.h"
-#include "dglpcx.h"
-#include "dglevent.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 void dgl_init(void);
+void dgl_close(void);
+
+typedef enum {
+    DGL_NONE = 0,
+    DGL_ALREADY_INIT,
+    DGL_NEARPTR_ENABLE_FAILURE,
+    DGL_VIDEO_ALREADY_INITIALIZED,
+    DGL_VIDEO_MODE_13H_INIT_FAILURE,
+    DGL_VIDEO_TEXT_MODE_INIT_FAILURE,
+    DGL_KEYBOARD_ALREADY_INITIALIZED,
+    DGL_KEYBOARD_IRQ_INSTALL_FAILURE,
+    DGL_KEYBOARD_IRQ_RESTORE_FAILURE,
+    DGL_KEYBOARD_UPDATE_LED_FAILURE,
+    DGL_MOUSE_ALREADY_INITIALIZED,
+    DGL_MOUSE_ALLOCATE_CALLBACK_FAILURE,
+    DGL_MOUSE_FREE_CALLBACK_FAILURE,
+    DGL_MOUSE_INT_CALLBACK_SET_FAILURE,
+    DGL_MOUSE_INT_CALLBACK_RESTORE_FAILURE,
+    DGL_EVENTS_ALREADY_INITIALIZED,
+    DGL_IO_ERROR,
+    DGL_PCX_BAD_FORMAT
+} DGL_ERROR;
+
+DGL_ERROR dgl_last_error(void);
+const char* dgl_last_error_message(void);
+void dgl_set_error(DGL_ERROR error);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
 

DGLBLIT.C

@@ -1,10 +1,14 @@
+#include "dglcmn.h"
+#include "dglrect.h"
 #include "dglblit.h"
 #include "dglclip.h"
 
-static boolean clip_blit(const RECT *dest_clip_region,
+static bool clip_blit(
+    const RECT *dest_clip_region,
     RECT *src_blit_region,
     int *dest_x,
-                         int *dest_y) {
+    int *dest_y
+) {
     int dest_clip_right = rect_right(dest_clip_region);
     int dest_clip_bottom = rect_bottom(dest_clip_region);
     int offset;
@@ -13,7 +17,7 @@ static boolean clip_blit(const RECT *dest_clip_region,
     if (*dest_x < dest_clip_region->x) {
         // completely off the left edge?
         if ((*dest_x + src_blit_region->width - 1) < dest_clip_region->x)
-            return FALSE;
+            return false;
 
         offset = src_blit_region->x - *dest_x;
         src_blit_region->x += offset;
@@ -25,7 +29,7 @@ static boolean clip_blit(const RECT *dest_clip_region,
     if (*dest_x > (dest_clip_region->width - src_blit_region->width)) {
         // completely off the right edge?
         if (*dest_x > dest_clip_right)
-            return FALSE;
+            return false;
 
         offset = *dest_x + src_blit_region->width - dest_clip_region->width;
         src_blit_region->width -= offset;
@@ -35,7 +39,7 @@ static boolean clip_blit(const RECT *dest_clip_region,
     if (*dest_y < dest_clip_region->y) {
         // completely off the top edge?
         if ((*dest_y + src_blit_region->height - 1) < dest_clip_region->y)
-            return FALSE;
+            return false;
 
         offset = dest_clip_region->y - *dest_y;
         src_blit_region->y += offset;
@@ -47,52 +51,58 @@ static boolean clip_blit(const RECT *dest_clip_region,
     if (*dest_y > (dest_clip_region->height - src_blit_region->height)) {
         // completely off the bottom edge?
         if (*dest_y > dest_clip_bottom)
-            return FALSE;
+            return false;
 
         offset = *dest_y + src_blit_region->height - dest_clip_region->height;
         src_blit_region->height -= offset;
     }
 
-    return TRUE;
+    return true;
 }
 
-void surface_blit_region(const SURFACE *src,
+void blit_region(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                         int dest_y) {
+    int dest_y
+) {
     RECT src_region = rect(src_x, src_y, src_width, src_height);
-    boolean on_screen = clip_blit(&dest->clip_region, &src_region, &dest_x, &dest_y);
+    bool on_screen = clip_blit(&dest->clip_region, &src_region, &dest_x, &dest_y);
 
     if (!on_screen)
         return;
 
-    surface_blit_region_f(src, dest,
+    blit_region_f(
+        src, dest,
         src_region.x, src_region.y,
         src_region.width, src_region.height,
-                          dest_x, dest_y);
+        dest_x, dest_y
+    );
 }
 
-void surface_blit_region_f(const SURFACE *src,
+void blit_region_f(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                           int dest_y) {
-    const byte *psrc;
-    byte *pdest;
+    int dest_y
+) {
+    const uint8 *psrc;
+    uint8 *pdest;
     int lines;
     int src_y_inc = src->width - src_width;
     int dest_y_inc = dest->width - src_width;
     int width_4, width_remainder;
 
-    psrc = (const byte*)surface_pointer(src, src_x, src_y);
-    pdest = (byte*)surface_pointer(dest, dest_x, dest_y);
+    psrc = (const uint8*)surface_pointer(src, src_x, src_y);
+    pdest = (uint8*)surface_pointer(dest, dest_x, dest_y);
     lines = src_height;
 
     width_4 = src_width / 4;
@@ -100,57 +110,63 @@ void surface_blit_region_f(const SURFACE *src,
 
     if (width_4 && !width_remainder) {
         // width is a multiple of 4 (no remainder)
-        direct_blit_4(width_4, lines, pdest, psrc, dest_y_inc, src_y_inc);
+        lowlevel_blit_4(width_4, lines, pdest, psrc, dest_y_inc, src_y_inc);
 
     } else if (width_4 && width_remainder) {
         // width is >= 4 and there is a remainder ( <= 3 )
-        direct_blit_4r(width_4, lines, width_remainder, pdest, psrc, dest_y_inc, src_y_inc);
+        lowlevel_blit_4r(width_4, lines, width_remainder, pdest, psrc, dest_y_inc, src_y_inc);
 
     } else {
         // width is <= 3
-        direct_blit_r(width_remainder, lines, pdest, psrc, dest_y_inc, src_y_inc);
+        lowlevel_blit_r(width_remainder, lines, pdest, psrc, dest_y_inc, src_y_inc);
     }
 }
 
-void surface_blit_sprite_region(const SURFACE *src,
+void blit_sprite_region(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                                int dest_y) {
+    int dest_y
+) {
     RECT src_region = rect(src_x, src_y, src_width, src_height);
-    boolean on_screen = clip_blit(&dest->clip_region, &src_region, &dest_x, &dest_y);
+    bool on_screen = clip_blit(&dest->clip_region, &src_region, &dest_x, &dest_y);
 
     if (!on_screen)
         return;
 
-    surface_blit_sprite_region_f(src, dest,
+    blit_sprite_region_f(
+        src, dest,
         src_region.x, src_region.y,
         src_region.width, src_region.height,
-                                 dest_x, dest_y);
+        dest_x, dest_y
+    );
 }
 
-void surface_blit_sprite_region_f(const SURFACE *src,
+void blit_sprite_region_f(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                                  int dest_y) {
-    const byte *psrc;
-    byte *pdest;
-    byte pixel;
+    int dest_y
+) {
+    const uint8 *psrc;
+    uint8 *pdest;
+    uint8 pixel;
     int src_y_inc, dest_y_inc;
     int width, width_4, width_8, width_remainder;
     int lines_left;
     int x;
 
-    psrc = (const byte*)surface_pointer(src, src_x, src_y);
+    psrc = (const uint8*)surface_pointer(src, src_x, src_y);
     src_y_inc = src->width;
-    pdest = (byte*)surface_pointer(dest, dest_x, dest_y);
+    pdest = (uint8*)surface_pointer(dest, dest_x, dest_y);
     dest_y_inc = dest->width;
     width = src_width;
     lines_left = src_height;
@@ -164,25 +180,25 @@ void surface_blit_sprite_region_f(const SURFACE *src,
     if (width_4 && !width_remainder) {
         if ((width_4 & 1) == 0) {
             // width is actually an even multiple of 8!
-            direct_blit_sprite_8(width_4 / 2, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
+            lowlevel_blit_sprite_8(width_4 / 2, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
         } else {
             // width is a multiple of 4 (no remainder)
-            direct_blit_sprite_4(width_4, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
+            lowlevel_blit_sprite_4(width_4, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
         }
 
     } else if (width_4 && width_remainder) {
         if ((width_4 & 1) == 0) {
             // width is _mostly_ made up of an even multiple of 8,
             // plus a small remainder
-            direct_blit_sprite_8r(width_4 / 2, lines_left, pdest, psrc, width_remainder, dest_y_inc, src_y_inc);
+            lowlevel_blit_sprite_8r(width_4 / 2, lines_left, pdest, psrc, width_remainder, dest_y_inc, src_y_inc);
         } else {
             // width is >= 4 and there is a remainder
-            direct_blit_sprite_4r(width_4, lines_left, pdest, psrc, width_remainder, dest_y_inc, src_y_inc);
+            lowlevel_blit_sprite_4r(width_4, lines_left, pdest, psrc, width_remainder, dest_y_inc, src_y_inc);
         }
 
     } else {
         // width is <= 3
-        direct_blit_sprite_r(width_remainder, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
+        lowlevel_blit_sprite_r(width_remainder, lines_left, pdest, psrc, dest_y_inc, src_y_inc);
     }
 }
 

DGLBLIT.H

@@ -1,79 +1,163 @@
-#ifndef DGL_DGLBLIT_H_INCLUDED
-#define DGL_DGLBLIT_H_INCLUDED
+#ifndef LIBDGL_DGLBLIT_H
+#define LIBDGL_DGLBLIT_H
 
 #include "dglgfx.h"
-#include "dglutil.h"
 
-void surface_blit_region(const SURFACE *src,
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void blit_region(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                         int dest_y);
+    int dest_y
+);
 
-void surface_blit_region_f(const SURFACE *src,
+void blit_region_f(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                           int dest_y);
+    int dest_y
+);
 
-static void surface_blit(const SURFACE *src, SURFACE *dest, int x, int y);
-
-static void surface_blit_f(const SURFACE *src, SURFACE *dest, int x, int y);
-
-void surface_blit_sprite_region(const SURFACE *src,
+void blit_sprite_region(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                                int dest_y);
+    int dest_y
+);
 
-void surface_blit_sprite_region_f(const SURFACE *src,
+void blit_sprite_region_f(
+    const SURFACE *src,
     SURFACE *dest,
     int src_x,
     int src_y,
     int src_width,
     int src_height,
     int dest_x,
-                                  int dest_y);
-
-void direct_blit_4(int width4, int lines, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_4r(int width4, int lines, int remainder, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_r(int width, int lines, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_sprite_4(int width4, int lines, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_sprite_4r(int width4, int lines, byte *dest, const byte *src, int remainder, int dest_y_inc, int src_y_inc);
-void direct_blit_sprite_r(int width, int lines, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_sprite_8(int width8, int lines, byte *dest, const byte *src, int dest_y_inc, int src_y_inc);
-void direct_blit_sprite_8r(int width8, int lines, byte *dest, const byte *src, int remainder, int dest_y_inc, int src_y_inc);
-
-static void surface_blit_sprite(const SURFACE *src, SURFACE *dest, int x, int y);
-static void surface_blit_sprite_f(const SURFACE *src, SURFACE *dest, int x, int y);
+    int dest_y
+);
 
 // --------------------------------------------------------------------------
 
-static void surface_blit(const SURFACE *src, SURFACE *dest, int x, int y) {
-    surface_blit_region(src, dest, 0, 0, src->width, src->height, x, y);
-}
+void lowlevel_blit_4(
+    int width4,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_4r(
+    int width4,
+    int lines,
+    int remainder,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_r(
+    int width,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_sprite_4(
+    int width4,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_sprite_4r(
+    int width4,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int remainder,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_sprite_r(
+    int width,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_sprite_8(
+    int width8,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+void lowlevel_blit_sprite_8r(
+    int width8,
+    int lines,
+    uint8 *dest,
+    const uint8 *src,
+    int remainder,
+    int dest_y_inc,
+    int src_y_inc
+);
+
+// --------------------------------------------------------------------------
 
 
-static void surface_blit_f(const SURFACE *src, SURFACE *dest, int x, int y) {
-    surface_blit_region_f(src, dest, 0, 0, src->width, src->height, x, y);
+static void blit(const SURFACE *src, SURFACE *dest, int x, int y);
+static void blit_f(const SURFACE *src, SURFACE *dest, int x, int y);
+static void blit_sprite(const SURFACE *src, SURFACE *dest, int x, int y);
+static void blit_sprite_f(const SURFACE *src, SURFACE *dest, int x, int y);
+
+
+// --------------------------------------------------------------------------
+
+static void blit(const SURFACE *src, SURFACE *dest, int x, int y) {
+    blit_region(src, dest, 0, 0, src->width, src->height, x, y);
 }
 
-static void surface_blit_sprite(const SURFACE *src, SURFACE *dest, int x, int y) {
-    surface_blit_sprite_region(src, dest, 0, 0, src->width, src->height, x, y);
+static void blit_f(const SURFACE *src, SURFACE *dest, int x, int y) {
+    blit_region_f(src, dest, 0, 0, src->width, src->height, x, y);
 }
 
-static void surface_blit_sprite_f(const SURFACE *src, SURFACE *dest, int x, int y) {
-    surface_blit_sprite_region_f(src, dest, 0, 0, src->width, src->height, x, y);
+static void blit_sprite(const SURFACE *src, SURFACE *dest, int x, int y) {
+    blit_sprite_region(src, dest, 0, 0, src->width, src->height, x, y);
 }
 
+static void blit_sprite_f(const SURFACE *src, SURFACE *dest, int x, int y) {
+    blit_sprite_region_f(src, dest, 0, 0, src->width, src->height, x, y);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLBLITA.ASM

@@ -7,23 +7,23 @@ codeseg
 
 locals
 
-public direct_blit_4_
-public direct_blit_4r_
-public direct_blit_r_
-public direct_blit_sprite_4_
-public direct_blit_sprite_4r_
-public direct_blit_sprite_r_
-public direct_blit_sprite_8_
-public direct_blit_sprite_8r_
+public lowlevel_blit_4_
+public lowlevel_blit_4r_
+public lowlevel_blit_r_
+public lowlevel_blit_sprite_4_
+public lowlevel_blit_sprite_4r_
+public lowlevel_blit_sprite_r_
+public lowlevel_blit_sprite_8_
+public lowlevel_blit_sprite_8r_
 
-; direct_blit_4_
+; lowlevel_blit_4_
 ;    eax    = width4
 ;    edx    = lines
 ;    ebx    = dest
 ;    ecx    = src
 ;    ebp+8  = dest_y_inc
 ;    ebp+12 = src_y_inc
-proc direct_blit_4_ near
+proc lowlevel_blit_4_ near
 arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -62,7 +62,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_4r_
+; lowlevel_blit_4r_
 ;    eax    = width4
 ;    edx    = lines
 ;    ebx    = remainder
@@ -70,7 +70,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 ;    ebp+8  = src
 ;    ebp+12 = dest_y_inc
 ;    ebp+16 = src_y_inc
-proc direct_blit_4r_ near
+proc lowlevel_blit_4r_ near
 arg @@src:dword, @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -107,14 +107,14 @@ arg @@src:dword, @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_r_
+; lowlevel_blit_r_
 ;    eax    = width
 ;    edx    = lines
 ;    ebx    = dest
 ;    ecx    = src
 ;    ebp+8  = dest_y_inc
 ;    ebp+12 = src_y_inc
-proc direct_blit_r_ near
+proc lowlevel_blit_r_ near
 arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -148,14 +148,14 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_sprite_4_
+; lowlevel_blit_sprite_4_
 ;    eax    = width4
 ;    edx    = lines
 ;    ebx    = dest
 ;    ecx    = src
 ;    ebp+8  = dest_y_inc
 ;    ebp+12 = src_y_inc
-proc direct_blit_sprite_4_ near
+proc lowlevel_blit_sprite_4_ near
 arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -214,7 +214,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_sprite_4r_
+; lowlevel_blit_sprite_4r_
 ;    eax    = width4
 ;    edx    = lines
 ;    ebx    = dest
@@ -222,7 +222,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 ;    ebp+8  = remainder
 ;    ebp+12 = dest_y_inc
 ;    ebp+16 = src_y_inc
-proc direct_blit_sprite_4r_ near
+proc lowlevel_blit_sprite_4r_ near
 arg @@remainder:dword, @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -295,14 +295,14 @@ arg @@remainder:dword, @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_sprite_r_
+; lowlevel_blit_sprite_r_
 ;    eax    = width
 ;    edx    = lines
 ;    ebx    = dest
 ;    ecx    = src
 ;    ebp+8  = dest_y_inc
 ;    ebp+12 = src_y_inc
-proc direct_blit_sprite_r_ near
+proc lowlevel_blit_sprite_r_ near
 arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -347,14 +347,14 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_sprite_8_
+; lowlevel_blit_sprite_8_
 ;    eax    = width8
 ;    edx    = lines
 ;    ebx    = dest
 ;    ecx    = src
 ;    ebp+8  = dest_y_inc
 ;    ebp+12 = src_y_inc
-proc direct_blit_sprite_8_ near
+proc lowlevel_blit_sprite_8_ near
 arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp
@@ -429,7 +429,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 
     endp
 
-; direct_blit_sprite_8r_
+; lowlevel_blit_sprite_8r_
 ;    eax    = width8
 ;    edx    = lines
 ;    ebx    = dest
@@ -437,7 +437,7 @@ arg @@dest_y_inc:dword, @@src_y_inc:dword
 ;    ebp+8  = remainder
 ;    ebp+12 = dest_y_inc
 ;    ebp+16 = src_y_inc
-proc direct_blit_sprite_8r_ near
+proc lowlevel_blit_sprite_8r_ near
 arg @@remainder:dword, @@dest_y_inc:dword, @@src_y_inc:dword
 
     push ebp

DGLCLIP.C

@@ -2,27 +2,47 @@
 #include "dglcmn.h"
 #include "dglmath.h"
 
-static boolean is_in_bounds(int clip_x,
+bool is_in_bounds(
+    int clip_x,
     int clip_y,
     int clip_right,
     int clip_bottom,
     int x1,
     int y1,
     int x2,
-                            int y2) {
+    int y2
+) {
     if (y1 < clip_y && y2 < clip_y)
-        return FALSE;
+        return false;
     if (y1 > clip_bottom && y2 > clip_bottom)
-        return FALSE;
+        return false;
     if (x1 < clip_x && x2 < clip_x)
-        return FALSE;
+        return false;
     if (x1 > clip_right && x2 > clip_right)
-        return FALSE;
+        return false;
 
-    return TRUE;
+    return true;
 }
 
-boolean is_point_in_bounds(const RECT *clip_region, int x, int y) {
+bool is_rect_in_bounds(const RECT *clip_region, const RECT *r) {
+    int clip_right = rect_right(clip_region);
+    int clip_bottom = rect_bottom(clip_region);
+    int x2 = rect_right(r);
+    int y2 = rect_bottom(r);
+
+    if (r->y < clip_region->y && y2 < clip_region->y)
+        return false;
+    if (r->y > clip_bottom && y2 > clip_bottom)
+        return false;
+    if (r->x < clip_region->x && x2 < clip_region->x)
+        return false;
+    if (r->x > clip_right && x2 > clip_right)
+        return false;
+
+    return true;
+}
+
+bool is_point_in_bounds(const RECT *clip_region, int x, int y) {
     return (
         x >= clip_region->x &&
         y >= clip_region->y &&
@@ -31,18 +51,14 @@ boolean is_point_in_bounds(const RECT *clip_region, int x, int y) {
     );
 }
 
-boolean clamp_to_region(const RECT *clip_region,
-                        int *x1,
-                        int *y1,
-                        int *x2,
-                        int *y2) {
+bool clamp_to_region(const RECT *clip_region, int *x1, int *y1, int *x2, int *y2) {
     int clip_x = clip_region->x;
     int clip_y = clip_region->y;
     int clip_right = rect_right(clip_region);
     int clip_bottom = rect_bottom(clip_region);
 
     if (!is_in_bounds(clip_x, clip_y, clip_right, clip_bottom, *x1, *y1, *x2, *y2))
-        return FALSE;
+        return true;
 
     // at least partially within bounds
 
@@ -55,10 +71,10 @@ boolean clamp_to_region(const RECT *clip_region,
     if (*x2 < clip_x)      *x2 = clip_x;
     if (*x2 > clip_right)  *x2 = clip_right;
 
-    return TRUE;
+    return true;
 }
 
-boolean clip_to_region(const RECT *clip_region, RECT *r) {
+bool clip_to_region(const RECT *clip_region, RECT *r) {
     int clip_right = rect_right(clip_region);
     int clip_bottom = rect_bottom(clip_region);
     int offset;
@@ -67,7 +83,7 @@ boolean clip_to_region(const RECT *clip_region, RECT *r) {
     if (r->x < clip_region->x) {
         // completely off the left edge?
         if (rect_right(r) < clip_region->x)
-            return FALSE;
+            return false;
 
         offset = clip_region->x - r->x;
         r->x += offset;
@@ -78,7 +94,7 @@ boolean clip_to_region(const RECT *clip_region, RECT *r) {
     if (r->x > (clip_region->width - r->width)) {
         // completely off the right edge?
         if (r->x > clip_right)
-            return FALSE;
+            return false;
 
         offset = r->x + r->width - clip_region->width;
         r->width -= offset;
@@ -88,7 +104,7 @@ boolean clip_to_region(const RECT *clip_region, RECT *r) {
     if (r->y < clip_region->y) {
         // completely off the top edge?
         if (rect_bottom(r) < clip_region->y)
-            return FALSE;
+            return false;
 
         offset = clip_region->y - r->y;
         r->y += offset;
@@ -99,13 +115,12 @@ boolean clip_to_region(const RECT *clip_region, RECT *r) {
     if (r->y > (clip_region->height - r->height)) {
         // completely off the bottom edge?
         if (r->y > clip_bottom)
-            return FALSE;
+            return false;
 
         offset = r->y + r->height - clip_region->height;
         r->height -= offset;
     }
 
-    return TRUE;
+    return true;
 }
 
-

DGLCLIP.H

@@ -1,39 +1,32 @@
-#ifndef DGL_DGLCLIP_H_INCLUDED
-#define DGL_DGLCLIP_H_INCLUDED
+#ifndef LIBDGL_DGLCLIP_H
+#define LIBDGL_DGLCLIP_H
 
 #include "dglcmn.h"
 #include "dglrect.h"
 
-/*
- * Determines if the given point lies within the clipping region.
- * @param clip_region the clipping region to check against
- * @param x x coordinate of the point
- * @param y y coordinate of the point
- * @return TRUE if the point lies inside the clipping region
- */
-boolean is_point_in_bounds(const RECT *clip_region, int x, int y);
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-/*
- * Clamps the coordinates given to the clipping region, assuming that the
- * region defined by the coordinates lies at least partially within the
- * clipping region.
- * @param clip_region the clipping region to check against and clamp to
- * @param x1 x coordinate of the top-left point of the region to clamp
- * @param y1 y coordinate of the top-left point of the region to clamp
- * @param x2 x coordinate of the bottom-right point of the region to clamp
- * @param y2 y coordinate of the bottom-right point of the region to clamp
- * @return TRUE if the given region was clamped and was at least partially
- *         within the clipping region to begin with. If the region was
- *         totally outside of the clipping region, returns FALSE and the
- *         coordinates will not be modified.
- */
-boolean clamp_to_region(const RECT *clip_region,
-                        int *x1,
-                        int *y1,
-                        int *x2,
-                        int *y2);
+bool is_in_bounds(
+    int clip_x,
+    int clip_y,
+    int clip_right,
+    int clip_bottom,
+    int x1,
+    int y1,
+    int x2,
+    int y2
+);
 
-boolean clip_to_region(const RECT *clip_region, RECT *r);
+bool is_rect_in_bounds(const RECT *clip_region, const RECT *r);
+bool is_point_in_bounds(const RECT *clip_region, int x, int y);
+bool clamp_to_region(const RECT *clip_region, int *x1, int *y1, int *x2, int *y2);
+bool clip_to_region(const RECT *clip_region, RECT *r);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
 

DGLCMN.H

@@ -1,22 +1,23 @@
-#ifndef DGL_DGLCMN_H_INCLUDED
-#define DGL_DGLCMN_H_INCLUDED
+#ifndef LIBDGL_DGLCMN_H
+#define LIBDGL_DGLCMN_H
 
-typedef int             boolean;
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-typedef char            byte;
-typedef	short           word;
-typedef int             dword;
+typedef char                 int8;
+typedef short                int16;
+typedef int                  int32;
 
-typedef unsigned char   ubyte;
-typedef unsigned short  uword;
-typedef unsigned int    udword;
+typedef unsigned char        uint8;
+typedef unsigned short       uint16;
+typedef unsigned int         uint32;
 
-typedef unsigned char   uchar;
-typedef unsigned short  ushort;
-typedef unsigned int    uint;
-
-#define TRUE  1
-#define FALSE 0
+#ifndef bool
+typedef int                  bool;
+#define true                 1
+#define false                0
+#endif
 
 #define BIT_0                0x1
 #define BIT_1                0x2
@@ -32,5 +33,16 @@ typedef unsigned int    uint;
 #define BIT_CLEAR(bit, x)    ((x) &= ~(bit))
 #define BIT_TOGGLE(bit, x)   ((x) ^= (bit))
 
+#ifndef MAX
+#define MAX(a, b)            (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef MIN
+#define MIN(a, b)            (((a) < (b)) ? (a) : (b))
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLDRAW.C

@@ -1,6 +1,6 @@
 #include "dgldraw.h"
 #include "dglgfx.h"
-#include "dglmath.h"
+#include "dglrect.h"
 #include "dglutil.h"
 #include <stdio.h>
 #include <stdlib.h>
@@ -9,18 +9,13 @@
 
 static char printf_buffer[1024];
 
-void surface_hline_f(SURFACE *surface, int x1, int x2, int y, int color) {
-    byte *p = surface_pointer(surface, x1, y);
+void draw_hline_f(SURFACE *surface, int x1, int x2, int y, uint8 color) {
+    uint8 *p = surface_pointer(surface, x1, y);
     mem_fill(p, color, (x2 - x1 + 1));
 }
 
-void surface_vline_f(SURFACE *surface, int x, int y1, int y2, int color) {
-    byte *p = surface_pointer(surface, x, y1);
-    int line_inc = surface->width;
-    int lines_left = y2 - y1 + 1;
-
-    extern void draw_line(byte *dest, int color, int line_inc, int lines_left);
-    #pragma aux draw_line =          \
+extern void _draw_vline(uint8 *dest, uint8 color, int line_inc, int lines_left);
+#pragma aux _draw_vline =          \
     "    test ecx, ecx"            \
     "    jz done"                  \
     "draw:"                        \
@@ -29,16 +24,22 @@ void surface_vline_f(SURFACE *surface, int x, int y1, int y2, int color) {
     "    dec ecx"                  \
     "    jnz draw"                 \
     "done:"                        \
-        parm [edx] [eax] [ebx] [ecx];
-    draw_line(p, color, line_inc, lines_left);
+    parm [edx] [al] [ebx] [ecx];
+
+void draw_vline_f(SURFACE *surface, int x, int y1, int y2, uint8 color) {
+    uint8 *p = surface_pointer(surface, x, y1);
+    int line_inc = surface->width;
+    int lines_left = y2 - y1 + 1;
+
+    _draw_vline(p, color, line_inc, lines_left);
 }
 
-void surface_line(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
+void draw_line(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color) {
     int delta_x, delta_y;
     int delta_x_abs, delta_y_abs;
     int delta_x_sign, delta_y_sign;
     int x, y;
-    byte *p;
+    uint8 *p;
     int p_x_inc;
     int p_y_inc;
     int i;
@@ -66,7 +67,7 @@ void surface_line(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
         dy >= clip_y1 &&
         dx <= clip_x2 &&
         dy <= clip_y2)
-        *p = (byte)color;
+        *p = color;
 
     if (delta_x_abs >= delta_y_abs) {
         for (i = 0; i < delta_x_abs; ++i) {
@@ -85,7 +86,7 @@ void surface_line(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
                 dy >= clip_y1 &&
                 dx <= clip_x2 &&
                 dy <= clip_y2)
-                *p = (byte)color;
+                *p = color;
         }
     } else {
         for (i = 0; i < delta_y_abs; ++i) {
@@ -104,17 +105,17 @@ void surface_line(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
                 dy >= clip_y1 &&
                 dx <= clip_x2 &&
                 dy <= clip_y2)
-                *p = (byte)color;
+                *p = color;
         }
     }
 }
 
-void surface_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
+void draw_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color) {
     int delta_x, delta_y;
     int delta_x_abs, delta_y_abs;
     int delta_x_sign, delta_y_sign;
     int x, y;
-    byte *p;
+    uint8 *p;
     int p_x_inc;
     int p_y_inc;
     int i;
@@ -132,7 +133,7 @@ void surface_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color)
     p_x_inc = delta_x_sign;
     p_y_inc = delta_y_sign * surface->width;
 
-    *p = (byte)color;
+    *p = color;
 
     if (delta_x_abs >= delta_y_abs) {
         for (i = 0; i < delta_x_abs; ++i) {
@@ -144,7 +145,7 @@ void surface_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color)
             }
 
             p += p_x_inc;
-            *p = (byte)color;
+            *p = color;
         }
     } else {
         for (i = 0; i < delta_y_abs; ++i) {
@@ -156,13 +157,19 @@ void surface_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color)
             }
 
             p += p_y_inc;
-            *p = (byte)color;
+            *p = color;
         }
     }
 }
 
-extern void draw_both_vert_lines(byte *left, byte *right, int color, int y_inc, int height);
-#pragma aux draw_both_vert_lines =      \
+extern void _draw_both_vert_lines(
+    uint8 *left,
+    uint8 *right,
+    uint8 color,
+    int y_inc,
+    int height
+);
+#pragma aux _draw_both_vert_lines =      \
     "   inc ecx"                         \
     "draw:"                              \
     "   mov [edi], al"                   \
@@ -172,10 +179,15 @@ extern void draw_both_vert_lines(byte *left, byte *right, int color, int y_inc,
     "   dec ecx"                         \
     "   jnz draw"                        \
     "done:"                              \
-    parm [edi] [esi] [eax] [edx] [ecx];
+    parm [edi] [esi] [al] [edx] [ecx];
 
-extern void draw_vert_line(byte *dest, int color, int y_inc, int height);
-#pragma aux draw_vert_line =      \
+extern void _draw_vert_line(
+    uint8 *dest,
+    uint8 color,
+    int y_inc,
+    int height
+);
+#pragma aux _draw_vert_line =      \
     "   inc ecx"                   \
     "draw:"                        \
     "   mov [edi], al"             \
@@ -183,9 +195,9 @@ extern void draw_vert_line(byte *dest, int color, int y_inc, int height);
     "   dec ecx"                   \
     "   jnz draw"                  \
     "done:"                        \
-    parm [edi] [eax] [edx] [ecx];
+    parm [edi] [al] [edx] [ecx];
 
-void surface_rect(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
+void draw_rect(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color) {
     RECT clipped;
     int clipped_x2, clipped_y2;
 
@@ -204,42 +216,41 @@ void surface_rect(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
 
     clipped_x2 = clipped.x + clipped.width - 1;
     clipped_y2 = clipped.y + clipped.height - 1;
-    color = fill32(color);
 
     // top line, only if y1 was within bounds
     if (y1 == clipped.y) {
-        byte *p = surface_pointer(surface, clipped.x, clipped.y);
-        mem_fill32(p, color, clipped.width);
+        uint8 *p = surface_pointer(surface, clipped.x, clipped.y);
+        mem_fill(p, color, clipped.width);
     }
 
     // bottom line, only if y2 was within bounds
     if (y2 == clipped_y2) {
-        byte *p = surface_pointer(surface, clipped.x, clipped_y2);
-        mem_fill32(p, color, clipped.width);
+        uint8 *p = surface_pointer(surface, clipped.x, clipped_y2);
+        mem_fill(p, color, clipped.width);
     }
 
     // draw both left and right lines if neither x1 nor x2 were clipped
     if (x1 == clipped.x && x2 == clipped_x2) {
-        byte *p1 = surface_pointer(surface, clipped.x, clipped.y);
-        byte *p2 = surface_pointer(surface, clipped_x2, clipped.y);
-        draw_both_vert_lines(p1, p2, color, surface->width, clipped.height - 1);
+        uint8 *p1 = surface_pointer(surface, clipped.x, clipped.y);
+        uint8 *p2 = surface_pointer(surface, clipped_x2, clipped.y);
+        _draw_both_vert_lines(p1, p2, color, surface->width, clipped.height - 1);
 
     // draw left line if x1 was not clipped
     } else if (x1 == clipped.x) {
-        byte *p = surface_pointer(surface, clipped.x, clipped.y);
-        draw_vert_line(p, color, surface->width, clipped.height - 1);
+        uint8 *p = surface_pointer(surface, clipped.x, clipped.y);
+        _draw_vert_line(p, color, surface->width, clipped.height - 1);
 
     // draw right line if x2 was not clipped
     } else if (x2 == clipped_x2) {
-        byte *p = surface_pointer(surface, clipped_x2, clipped.y);
-        draw_vert_line(p, color, surface->width, clipped.height - 1);
+        uint8 *p = surface_pointer(surface, clipped_x2, clipped.y);
+        _draw_vert_line(p, color, surface->width, clipped.height - 1);
     }
 }
 
-void surface_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color) {
-    byte *p;
-    byte *p1;
-    byte *p2;
+void draw_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color) {
+    uint8 *p;
+    uint8 *p1;
+    uint8 *p2;
     int width = x2 - x1 + 1;
     int lines_left = y2 - y1;
     int y_inc = surface->width;
@@ -249,15 +260,17 @@ void surface_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color)
     p1 = p;
     p2 = p + width - 1;
 
-    direct_rect_f(color, width, y_inc, lines_left, p1, p2);
+    lowlevel_rect_f(color, width, y_inc, lines_left, p1, p2);
 }
 
-void surface_filled_rect(SURFACE *surface,
+void draw_filled_rect(
+    SURFACE *surface,
     int x1,
     int y1,
     int x2,
     int y2,
-                         int color) {
+    uint8 color
+) {
     if (!clamp_to_region(&surface->clip_region, &x1, &y1, &x2, &y2))
         return;
 
@@ -266,48 +279,54 @@ void surface_filled_rect(SURFACE *surface,
     if (y2 < y1)
         SWAP(int, y1, y2);
 
-    surface_filled_rect_f(surface, x1, y1, x2, y2, color);
+    draw_filled_rect_f(surface, x1, y1, x2, y2, color);
 }
 
-void surface_filled_rect_f(SURFACE *surface,
+void draw_filled_rect_f(
+    SURFACE *surface,
     int x1,
     int y1,
     int x2,
     int y2,
-                           int color) {
-    byte *p;
+    uint8 color
+) {
+    uint8 *p;
     int width = x2 - x1 + 1;
     int y_inc = surface->width;
     int lines_left = y2 - y1 + 1;
 
     p = surface_pointer(surface, x1, y1);
 
-    direct_filled_rect_f(color, y_inc, width, lines_left, p);
+    lowlevel_filled_rect_f(color, y_inc, width, lines_left, p);
 }
 
 #define CHAR_WIDTH               8
 #define CHAR_HEIGHT              8
 #define CHAR_LINE_BITMASK(x)     (1 << ((CHAR_WIDTH - 1) - (x)))
 #define IS_CHAR_PIXEL(x, line)   ((line) & CHAR_LINE_BITMASK(x))
+#define BIOS_FONT_ADDR           0xffa6e
 
 // dest_x, dest_y - original unclipped render x,y coords
 // dest_clipped - clipped destination render region
-static void print_char(SURFACE *surface,
+// TODO: rewrite this. this function is kinda sloppy...
+static void print_char(
+    SURFACE *surface,
     int dest_x,
     int dest_y,
     const RECT *dest_clipped,
-                       int color,
-                       char c) {
-    byte *p;
-    byte *rom_char;
-    char char_line_bits;
+    uint8 color,
+    char c
+) {
+    uint8 *p;
+    uint8 *rom_char;
+    uint8 char_line_bits;
     int cx, cy;
     int offset_x, offset_y;
     int width, height;
     int y_inc = surface->width;
 
     p = surface_pointer(surface, dest_clipped->x, dest_clipped->y);
-    rom_char = ((byte*)0xffa6e) + (c * CHAR_HEIGHT);
+    rom_char = ((uint8*)BIOS_FONT_ADDR) + (c * CHAR_HEIGHT);
 
     // get offset x,y to start rendering char from (will be in range 0-7)
     offset_x = dest_clipped->x - dest_x;
@@ -321,19 +340,21 @@ static void print_char(SURFACE *surface,
 
         for (cx = offset_x; cx < width; ++cx) {
             if (IS_CHAR_PIXEL(cx, char_line_bits))
-                p[cx - offset_x] = (byte)color;
+                p[cx - offset_x] = color;
         }
 
         p += y_inc;
     }
 }
 
-static void print_text(SURFACE *surface,
+static void print_text(
+    SURFACE *surface,
     int x,
     int y,
-                       int color,
-                       boolean clip,
-                       const char *text) {
+    uint8 color,
+    bool clip,
+    const char *text
+) {
     const char *c;
     RECT r;
     RECT draw_r;
@@ -364,37 +385,43 @@ static void print_text(SURFACE *surface,
     }
 }
 
-void surface_text(SURFACE *surface, int x, int y, int color, const char *text) {
-    print_text(surface, x, y, color, TRUE, text);
+void draw_text(SURFACE *surface, int x, int y, uint8 color, const char *text) {
+    print_text(surface, x, y, color, true, text);
 }
 
-void surface_text_f(SURFACE *surface, int x, int y, int color, const char *text) {
-    print_text(surface, x, y, color, FALSE, text);
+void draw_text_f(SURFACE *surface, int x, int y, uint8 color, const char *text) {
+    print_text(surface, x, y, color, false, text);
 }
 
-void surface_printf(SURFACE *surface,
+void draw_printf(
+    SURFACE *surface,
     int x,
     int y,
-                    int color,
-                    const char *format, ...) {
+    uint8 color,
+    const char *format,
+    ...
+) {
     va_list args;
     va_start(args, format);
     vsprintf(printf_buffer, format, args);
     va_end(args);
 
-    print_text(surface, x, y, color, TRUE, printf_buffer);
+    print_text(surface, x, y, color, true, printf_buffer);
 }
 
-void surface_printf_f(SURFACE *surface,
+void draw_printf_f(
+    SURFACE *surface,
     int x,
     int y,
-                      int color,
-                      const char *format, ...) {
+    uint8 color,
+    const char *format,
+    ...
+) {
     va_list args;
     va_start(args, format);
     vsprintf(printf_buffer, format, args);
     va_end(args);
 
-    print_text(surface, x, y, color, FALSE, printf_buffer);
+    print_text(surface, x, y, color, false, printf_buffer);
 }
 

DGLDRAW.H

@@ -1,72 +1,94 @@
-#ifndef DGL_DGLDRAW_H_INCLUDED
-#define DGL_DGLDRAW_H_INCLUDED
+#ifndef LIBDGL_DGLDRAW_H
+#define LIBDGL_DGLDRAW_H
 
 #include "dglgfx.h"
 #include "dglclip.h"
 #include "dglutil.h"
 
-static void surface_pset(SURFACE *surface, int x, int y, int color);
-static void surface_pset_f(SURFACE *surface, int x, int y, int color);
-static int surface_point(const SURFACE *surface, int x, int y);
-static int surface_point_f(const SURFACE *surface, int x, int y);
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-static void surface_hline(SURFACE *surface, int x1, int x2, int y, int color);
-void surface_hline_f(SURFACE *surface, int x1, int x2, int y, int color);
-static void surface_vline(SURFACE *surface, int x, int y1, int y2, int color);
-void surface_vline_f(SURFACE *surface, int x, int y1, int y2, int color);
-void surface_line(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
-void surface_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
+static void pset(SURFACE *surface, int x, int y, uint8 color);
+static void pset_f(SURFACE *surface, int x, int y, uint8 color);
+static uint8 pget(const SURFACE *surface, int x, int y);
+static uint8 pget_f(const SURFACE *surface, int x, int y);
 
-void surface_rect(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
-void surface_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
-void surface_filled_rect(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
-void surface_filled_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, int color);
+static void draw_hline(SURFACE *surface, int x1, int x2, int y, uint8 color);
+void draw_hline_f(SURFACE *surface, int x1, int x2, int y, uint8 color);
+static void draw_vline(SURFACE *surface, int x, int y1, int y2, uint8 color);
+void draw_vline_f(SURFACE *surface, int x, int y1, int y2, uint8 color);
+void draw_line(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
+void draw_line_f(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
 
-void surface_text(SURFACE *surface, int x, int y, int color, const char *text);
-void surface_text_f(SURFACE *surface, int x, int y, int color, const char *text);
-void surface_printf(SURFACE *surface, int x, int y, int color, const char *format, ...);
-void surface_printf_f(SURFACE *surface, int x, int y, int color, const char *format, ...);
+void draw_rect(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
+void draw_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
+void draw_filled_rect(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
+void draw_filled_rect_f(SURFACE *surface, int x1, int y1, int x2, int y2, uint8 color);
 
-void direct_rect_f(int color, int width, int y_inc, int lines, byte *p1, byte *p2);
-void direct_filled_rect_f(int color, int y_inc, int width, int lines, byte *dest);
+void draw_text(SURFACE *surface, int x, int y, uint8 color, const char *text);
+void draw_text_f(SURFACE *surface, int x, int y, uint8 color, const char *text);
+void draw_printf(SURFACE *surface, int x, int y, uint8 color, const char *format, ...);
+void draw_printf_f(SURFACE *surface, int x, int y, uint8 color, const char *format, ...);
+
+void lowlevel_rect_f(
+    uint8 color,
+    int width,
+    int y_inc,
+    int lines,
+    uint8 *p1,
+    uint8 *p2
+);
+
+void lowlevel_filled_rect_f(
+    uint8 color,
+    int y_inc,
+    int width,
+    int lines,
+    uint8 *dest
+);
 
 // --------------------------------------------------------------------------
 
-static void surface_pset(SURFACE *surface, int x, int y, int color) {
+static void pset(SURFACE *surface, int x, int y, uint8 color) {
     if (is_point_in_bounds(&surface->clip_region, x, y))
-        surface_pset_f(surface, x, y, color);
+        pset_f(surface, x, y, color);
 }
 
-static void surface_pset_f(SURFACE *surface, int x, int y, int color) {
-    int offset = surface_offset(surface, x, y);
+static void pset_f(SURFACE *surface, int x, int y, uint8 color) {
+    uint32 offset = surface_offset(surface, x, y);
     surface->pixels[offset] = color;
 }
 
-static int surface_point(const SURFACE *surface, int x, int y) {
+static uint8 pget(const SURFACE *surface, int x, int y) {
     if (is_point_in_bounds(&surface->clip_region, x, y))
-        return surface_point_f(surface, x, y);
+        return pget_f(surface, x, y);
     else
         return 0;
 }
 
-static int surface_point_f(const SURFACE *surface, int x, int y) {
-    int offset = surface_offset(surface, x, y);
+static uint8 pget_f(const SURFACE *surface, int x, int y) {
+    uint32 offset = surface_offset(surface, x, y);
     return surface->pixels[offset];
 }
 
-static void surface_hline(SURFACE *surface, int x1, int x2, int y, int color) {
+static void draw_hline(SURFACE *surface, int x1, int x2, int y, uint8 color) {
     if (x2 < x1)
         SWAP(int, x1, x2);
     if (clamp_to_region(&surface->clip_region, &x1, &y, &x2, &y))
-        surface_hline_f(surface, x1, x2, y, color);
+        draw_hline_f(surface, x1, x2, y, color);
 }
 
-static void surface_vline(SURFACE *surface, int x, int y1, int y2, int color) {
+static void draw_vline(SURFACE *surface, int x, int y1, int y2, uint8 color) {
     if (y2 < y1)
         SWAP(int, y1, y2);
     if (clamp_to_region(&surface->clip_region, &x, &y1, &x, &y2))
-        surface_vline_f(surface, x, y1, y2, color);
+        draw_vline_f(surface, x, y1, y2, color);
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLDRAWA.ASM

@@ -7,18 +7,18 @@ codeseg
 
 locals
 
-public direct_rect_f_
-public direct_filled_rect_f_
+public lowlevel_rect_f_
+public lowlevel_filled_rect_f_
 
 
-; direct_rect_f_
+; lowlevel_rect_f_
 ;    eax    = color
 ;    edx    = width
 ;    ebx    = y_inc
 ;    ecx    = lines
 ;    ebp+8  = p1
 ;    ebp+12 = p2
-proc direct_rect_f_ near
+proc lowlevel_rect_f_ near
 arg @@p1:dword, @@p2:dword
 
     push ebp
@@ -82,13 +82,13 @@ arg @@p1:dword, @@p2:dword
 
     endp
 
-; direct_filled_rect_f_
+; lowlevel_filled_rect_f_
 ;    eax    = color
 ;    edx    = y_inc
 ;    ebx    = width
 ;    ecx    = lines
 ;    ebp+8  = dest
-proc direct_filled_rect_f_ near
+proc lowlevel_filled_rect_f_ near
 arg @@dest:dword
 
     push ebp
@@ -98,7 +98,7 @@ arg @@dest:dword
 
     mov esi, ecx          ; get number of lines to be drawn
     test esi, esi         ; if there are no lines to draw, then return
-    jz @@done
+    jz @@early_done
 
     mov ah, al            ; spread color byte out over all 32-bits
     shl eax, 8            ; so 4 pixels can be written horizontally
@@ -148,6 +148,7 @@ arg @@dest:dword
 
 @@done:
     pop ebp
+@@early_done:
     pop esi
     pop edi
     pop ebp

DGLERROR.H

@@ -1,32 +0,0 @@
-#ifndef DGL_DGLERROR_H_INCLUDED
-#define DGL_DGLERROR_H_INCLUDED
-
-#include "dglcmn.h"
-
-typedef enum {
-    DGL_NONE = 0,
-    DGL_ALREADY_INIT,
-    DGL_NEARPTR_ENABLE_FAILURE,
-    DGL_VIDEO_ALREADY_INITIALIZED,
-    DGL_VIDEO_MODE_13H_INIT_FAILURE,
-    DGL_VIDEO_TEXT_MODE_INIT_FAILURE,
-    DGL_KEYBOARD_ALREADY_INITIALIZED,
-    DGL_KEYBOARD_IRQ_INSTALL_FAILURE,
-    DGL_KEYBOARD_IRQ_RESTORE_FAILURE,
-    DGL_KEYBOARD_UPDATE_LED_FAILURE,
-    DGL_MOUSE_ALREADY_INITIALIZED,
-    DGL_MOUSE_ALLOCATE_CALLBACK_FAILURE,
-    DGL_MOUSE_FREE_CALLBACK_FAILURE,
-    DGL_MOUSE_INT_CALLBACK_SET_FAILURE,
-    DGL_MOUSE_INT_CALLBACK_RESTORE_FAILURE,
-    DGL_EVENTS_ALREADY_INITIALIZED,
-    DGL_IO_ERROR,
-    DGL_PCX_BAD_FORMAT
-} DGL_ERROR;
-
-DGL_ERROR dgl_last_error(void);
-const char* dgl_last_error_message(void);
-void dgl_set_error(DGL_ERROR error);
-
-#endif
-

DGLEVENT.C

@@ -1,39 +1,39 @@
 #include "dglevent.h"
-#include "dglerror.h"
+#include "dgl.h"
 #include "dglutil.h"
 #include <string.h>
 
-volatile boolean _events_enabled;
+volatile bool _events_enabled = false;
 
 volatile INPUTEVENT _events_buffer[EVENTS_BUFFER_SIZE];
 volatile int _events_buffer_start = 0;
 volatile int _events_buffer_end = 0;
 
-boolean events_init(void) {
+bool events_init(void) {
     if (_events_enabled) {
         dgl_set_error(DGL_EVENTS_ALREADY_INITIALIZED);
-        return FALSE;
+        return false;
     }
 
     events_clear();
-    _events_enabled = TRUE;
+    _events_enabled = true;
 
-    return TRUE;
+    return true;
 }
 
-boolean events_shutdown(void) {
+bool events_shutdown(void) {
     if (!_events_enabled)
-        return TRUE;  // don't care
+        return true;  // don't care
 
-    _events_enabled = FALSE;
+    _events_enabled = false;
     events_clear();
 
-    return TRUE;
+    return true;
 }
 
-boolean events_poll(INPUTEVENT **event) {
+bool events_poll(volatile INPUTEVENT **event) {
     if (events_is_empty())
-        return FALSE;
+        return false;
 
     int_disable();
 
@@ -45,22 +45,26 @@ boolean events_poll(INPUTEVENT **event) {
 
     int_enable();
 
-    return TRUE;
+    return true;
 }
 
-boolean events_peek(INPUTEVENT **event) {
+bool events_peek(volatile INPUTEVENT **event) {
     if (events_is_empty())
-        return FALSE;
+        return false;
+
+    int_disable();
 
     *event = &_events_buffer[_events_buffer_start];
 
-    return TRUE;
+    int_enable();
+
+    return true;
 }
 
 void events_clear(void) {
     int_disable();
 
-    memset(_events_buffer, 0, sizeof(_events_buffer));
+    memset((void*)_events_buffer, 0, sizeof(_events_buffer));
     _events_buffer_start = 0;
     _events_buffer_end = 0;
 

DGLEVENT.H

@@ -1,17 +1,21 @@
-#ifndef DGL_DGLEVENT_H_INCLUDED
-#define DGL_DGLEVENT_H_INCLUDED
+#ifndef LIBDGL_DGLEVENT_H
+#define LIBDGL_DGLEVENT_H
 
 #include "dglcmn.h"
 #include "dglkbrd.h"
 #include "dglmouse.h"
 
-typedef byte EVENT_TYPE;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint8 EVENT_TYPE;
 
 #define EVENT_TYPE_KEYBOARD        1
 #define EVENT_TYPE_MOUSE_MOTION    2
 #define EVENT_TYPE_MOUSE_BUTTON    3
 
-typedef byte EVENT_ACTION;
+typedef uint8 EVENT_ACTION;
 
 #define EVENT_ACTION_PRESSED       1
 #define EVENT_ACTION_RELEASED      2
@@ -20,7 +24,7 @@ typedef byte EVENT_ACTION;
 typedef struct {
     KEY          key;
     EVENT_ACTION action;
-    uword mod;
+    uint16       mod;
 } INPUTEVENT_KEYBOARD;
 
 typedef struct {
@@ -47,7 +51,7 @@ typedef struct {
     };
 } INPUTEVENT;
 
-extern volatile boolean _events_enabled;
+extern volatile bool _events_enabled;
 
 #define EVENTS_BUFFER_SIZE 32
 
@@ -55,33 +59,76 @@ extern volatile INPUTEVENT _events_buffer[EVENTS_BUFFER_SIZE];
 extern volatile int _events_buffer_start;
 extern volatile int _events_buffer_end;
 
-boolean events_init(void);
-boolean events_shutdown(void);
-static boolean events_is_initialized(void);
+bool events_init(void);
+bool events_shutdown(void);
+static bool events_is_initialized(void);
 
-static boolean events_is_empty(void);
+static bool events_is_empty(void);
 
-boolean events_poll(INPUTEVENT **event);
-boolean events_peek(INPUTEVENT **event);
+bool events_poll(volatile INPUTEVENT **event);
+bool events_peek(volatile INPUTEVENT **event);
 
 void events_clear(void);
 
+static bool events_key_pressed(INPUTEVENT *event, KEY key);
+static bool events_key_released(INPUTEVENT *event, KEY key);
+static bool events_key_held(INPUTEVENT *event, KEY key);
+static bool events_mouse_pressed(INPUTEVENT *event, MOUSE_BUTTON button);
+static bool events_mouse_released(INPUTEVENT *event, MOUSE_BUTTON button);
+static bool events_mouse_held(INPUTEVENT *event, MOUSE_BUTTON button);
+
 static void _events_push(INPUTEVENT **out_event);
 
 // ---------------------------------------------------------------------------
 
-static boolean events_is_initialized(void) {
+static bool events_is_initialized(void) {
     return _events_enabled;
 }
 
-static boolean events_is_empty(void) {
+static bool events_is_empty(void) {
     return (_events_buffer_start == _events_buffer_end);
 }
 
+static bool events_key_pressed(INPUTEVENT *event, KEY key) {
+    return event->type == EVENT_TYPE_KEYBOARD &&
+           event->keyboard.action == EVENT_ACTION_PRESSED &&
+           event->keyboard.key == key;
+}
+
+static bool events_key_released(INPUTEVENT *event, KEY key) {
+    return event->type == EVENT_TYPE_KEYBOARD &&
+           event->keyboard.action == EVENT_ACTION_RELEASED &&
+           event->keyboard.key == key;
+}
+
+static bool events_key_held(INPUTEVENT *event, KEY key) {
+    return event->type == EVENT_TYPE_KEYBOARD &&
+           event->keyboard.action == EVENT_ACTION_HELD &&
+           event->keyboard.key == key;
+}
+
+static bool events_mouse_pressed(INPUTEVENT *event, MOUSE_BUTTON button) {
+    return event->type == EVENT_TYPE_MOUSE_BUTTON &&
+           event->mouse_button.action == EVENT_ACTION_PRESSED &&
+           event->mouse_button.button == button;
+}
+
+static bool events_mouse_released(INPUTEVENT *event, MOUSE_BUTTON button) {
+    return event->type == EVENT_TYPE_MOUSE_BUTTON &&
+           event->mouse_button.action == EVENT_ACTION_RELEASED &&
+           event->mouse_button.button == button;
+}
+
+static bool events_mouse_held(INPUTEVENT *event, MOUSE_BUTTON button) {
+    return event->type == EVENT_TYPE_MOUSE_BUTTON &&
+           event->mouse_button.action == EVENT_ACTION_HELD &&
+           event->mouse_button.button == button;
+}
+
 // only intended to be called from input device interrupt handler (the
 // usage is a little weird as a result)
 static void _events_push(INPUTEVENT **out_event) {
-    *out_event = &_events_buffer[_events_buffer_end];
+    *out_event = (INPUTEVENT*)&_events_buffer[_events_buffer_end];
 
     ++_events_buffer_end;
 
@@ -99,5 +146,9 @@ static void _events_push(INPUTEVENT **out_event) {
     }
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLFIXP.C

@@ -1,7 +1,7 @@
 #include "dglfixp.h"
 
 fixed fix_sqrt(fixed x) {
-    int t, q, b, r;
+    int32 t, q, b, r;
     r = x;
     b = 0x40000000;
     q = 0;
@@ -18,3 +18,20 @@ fixed fix_sqrt(fixed x) {
     return q;
 }
 
+fixed fix_atan2(fixed y, fixed x) {
+    fixed absY, mask, angle, r, r3;
+
+    mask = (y >> (sizeof(fixed)*8-1));
+    absY = (y + mask) ^ mask;
+
+    if (x >= 0) {
+        r = fix_div(x - absY, x + absY);
+
+    } else {
+        r = fix_div(x + absY, absY - x);
+
+    }
+
+    return 0;
+}
+

DGLFIXP.H

@@ -1,10 +1,14 @@
-#ifndef DGL_DGLFIXP_H_INCLUDED
-#define DGL_DGLFIXP_H_INCLUDED
+#ifndef LIBDGL_DGLFIXP_H
+#define LIBDGL_DGLFIXP_H
 
 #include "dglcmn.h"
 #include <math.h>
 
-typedef int fixed;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int32 fixed;
 
 #define FP_INT_SHIFT   16
 #define FP_FLOAT_SHIFT 65536.0f
@@ -14,6 +18,7 @@ static fixed fix_cos(fixed x);
 static fixed fix_tan(fixed x);
 
 fixed fix_sqrt(fixed x);
+fixed fix_atan2(fixed y, fixed x);
 
 fixed fix_mul(fixed a, fixed b);
 #pragma aux fix_mul =               \
@@ -34,7 +39,7 @@ fixed fix_div(fixed a, fixed b);
 #define FTOFIX(f)   ((fixed)((f) * FP_FLOAT_SHIFT))
 #define ITOFIX(i)   ((fixed)((i) << FP_INT_SHIFT))
 #define FIXTOF(x)   ((float)((x) / FP_FLOAT_SHIFT))
-#define FIXTOI(x)   ((int)(((x) + 0x8000) >> FP_INT_SHIFT))
+#define FIXTOI(x)   ((int32)(((x) + 0x8000) >> FP_INT_SHIFT))
 
 #define FP_1        ITOFIX(1)
 #define FP_2        ITOFIX(2)
@@ -85,5 +90,9 @@ static fixed fix_tan(fixed x) {
     return FTOFIX(tan(FIXTOF(x)));
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLGFX.C

@@ -1,20 +1,21 @@
+#include "dgl.h"
 #include "dglgfx.h"
 #include "dglblit.h"
 #include "dglutil.h"
-#include "dglerror.h"
+#include <conio.h>
 #include <stdlib.h>
 #include <string.h>
 
-extern void _video_mode(int mode);
-#pragma aux _video_mode = \
+extern void set_video_mode(int mode);
+#pragma aux set_video_mode = \
     "int 0x10"               \
     parm [eax];
 
-static boolean _initialized = FALSE;
+static bool _initialized = false;
 
 SURFACE *screen = NULL;
 
-static SURFACE* surface_create_internal(int width, int height, byte *pixels) {
+static SURFACE* surface_create_internal(int width, int height, uint8 *pixels) {
     SURFACE *surface = (SURFACE*)malloc(sizeof(SURFACE));
 
     surface->width = width;
@@ -27,49 +28,47 @@ static SURFACE* surface_create_internal(int width, int height, byte *pixels) {
         surface->pixels = pixels;
     } else {
         int size = width * height;
-        surface->pixels = (byte*)malloc(size);
+        surface->pixels = (uint8*)malloc(size);
         mem_fill(surface->pixels, 0, size);
     }
 
     return surface;
 }
 
-boolean video_init(void) {
-    byte *framebuffer;
+bool gfx_init(void) {
 
     if (_initialized) {
         dgl_set_error(DGL_VIDEO_ALREADY_INITIALIZED);
-        return FALSE;
+        return false;
     }
 
-    _video_mode(0x13);
+    set_video_mode(0x13);
 
-    framebuffer = (byte*)0xa0000;
-    screen = surface_create_internal(320, 200, framebuffer);
+    screen = surface_create_internal(320, 200, (uint8*)0xa0000);
     surface_clear(screen, 0);
 
-    _initialized = TRUE;
-    return TRUE;
+    _initialized = true;
+    return true;
 }
 
-boolean video_shutdown(void) {
+bool gfx_shutdown(void) {
     if (!_initialized)
-        return TRUE;   // don't care
+        return true;   // don't care
 
-    _video_mode(0x03);
+    set_video_mode(0x03);
 
     surface_free(screen);
     screen = NULL;
 
-    _initialized = FALSE;
-    return TRUE;
+    _initialized = false;
+    return true;
 }
 
-boolean video_is_initialized(void) {
+bool gfx_is_initialized(void) {
     return _initialized;
 }
 
-void video_wait_vsync(void) {
+void wait_vsync(void) {
     do {} while (inp(0x3da) & 0x8);
     do {} while (!(inp(0x3da) & 0x8));
 }
@@ -84,12 +83,13 @@ void surface_free(SURFACE *surface) {
 
     if (!BIT_ISSET(SURFACE_FLAGS_ALIASED, surface->flags))
         free(surface->pixels);
+
     free(surface);
 }
 
-void surface_clear(SURFACE *surface, int color) {
+void surface_clear(SURFACE *surface, uint8 color) {
     int length = surface->width * surface->height;
-    mem_fill(surface->pixels, (byte)color, length);
+    mem_fill(surface->pixels, color, length);
 }
 
 void surface_copy(const SURFACE *src, SURFACE *dest) {
@@ -97,7 +97,7 @@ void surface_copy(const SURFACE *src, SURFACE *dest) {
         int length = src->width * src->height;
         mem_copy(dest->pixels, src->pixels, length);
     } else {
-        surface_blit(src, dest, 0, 0);
+        blit(src, dest, 0, 0);
     }
 }
 

DGLGFX.H

@@ -1,44 +1,52 @@
-#ifndef DGL_DGLGFX_H_INCLUDED
-#define DGL_DGLGFX_H_INCLUDED
+#ifndef LIBDGL_DGLGFX_H
+#define LIBDGL_DGLGFX_H
 
 #include "dglcmn.h"
 #include "dglrect.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct {
     int    width;
     int    height;
-    byte         *pixels;
+    uint8  *pixels;
     RECT   clip_region;
-    unsigned int flags;
+    uint32 flags;
 } SURFACE;
 
 #define SURFACE_FLAGS_ALIASED      BIT_0
 
 extern SURFACE *screen;
 
-boolean video_init(void);
-boolean video_shutdown(void);
-boolean video_is_initialized(void);
+bool gfx_init(void);
+bool gfx_shutdown(void);
+bool gfx_is_initialized(void);
 
-void video_wait_vsync(void);
+void wait_vsync(void);
 
 SURFACE* surface_create(int width, int height);
 void surface_free(SURFACE *surface);
-void surface_clear(SURFACE *surface, int color);
+void surface_clear(SURFACE *surface, uint8 color);
 void surface_copy(const SURFACE *src, SURFACE *dest);
 
-static int surface_offset(const SURFACE *surface, int x, int y);
-static byte* surface_pointer(const SURFACE *surface, int x, int y);
+static int32 surface_offset(const SURFACE *surface, int x, int y);
+static uint8* surface_pointer(const SURFACE *surface, int x, int y);
 
 // --------------------------------------------------------------------------
 
-static int surface_offset(const SURFACE *surface, int x, int y) {
+static int32 surface_offset(const SURFACE *surface, int x, int y) {
     return (surface->width * y) + x;
 }
 
-static byte* surface_pointer(const SURFACE *surface, int x, int y) {
+static uint8* surface_pointer(const SURFACE *surface, int x, int y) {
     return surface->pixels + surface_offset(surface, x, y);
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLKBRD.C

@@ -1,10 +1,11 @@
 #include "dglkbrd.h"
+#include "dgl.h"
 #include "dglcmn.h"
 #include "dglevent.h"
 #include "dglutil.h"
-#include "dglerror.h"
-#include <string.h>
+#include <conio.h>
 #include <dos.h>
+#include <string.h>
 
 #define PIC_CTRL_PORT          0x20
 #define KEYBRD_DATA_PORT       0x60
@@ -21,15 +22,15 @@
 
 #define KEY_EXTENDED           ((KEY)0xe0)
 
-static boolean _installed = FALSE;
+static bool _installed = false;
 static INPUTEVENT *keyboard_event;
 
-volatile ubyte keys[128];
+volatile uint8 keys[128];
 
 volatile KEY _key_last_scan;
 volatile KEY _key_scan;
-volatile uword key_flags;
-volatile uword key_mod;
+volatile uint16 key_flags;
+volatile uint16 key_mod;
 
 static char lookup_key_to_char[128] = {
     0,    0,    '1',  '2',  '3',  '4',  '5',  '6',  // 00 - 07
@@ -189,9 +190,9 @@ static void wait_kb_data_write() {
 }
 
 // sends data to the keyboard data port. checks for success
-// and returns TRUE if the data write succeeded
-static boolean send_kb_data(ubyte data) {
-    ubyte result;
+// and returns true if the data write succeeded
+static bool send_kb_data(uint8 data) {
+    uint8 result;
 
     wait_kb_data_write();
     outp(KEYBRD_DATA_PORT, data);
@@ -201,28 +202,28 @@ static boolean send_kb_data(ubyte data) {
     return (result == 0xFA);
 }
 
-static uword get_kb_flags(void) {
-    return *((uword*)KEYBRD_FLAGS_ADDR);
+static uint16 get_kb_flags(void) {
+    return *((uint16*)KEYBRD_FLAGS_ADDR);
 }
 
-static void set_kb_flags(uword flags) {
-    *((uword*)KEYBRD_FLAGS_ADDR) = flags;
+static void set_kb_flags(uint16 flags) {
+    *((uint16*)KEYBRD_FLAGS_ADDR) = flags;
 }
 
 // updates the keyboard indicator LEDs from the num/caps/scroll lock flags
 // set in the passed keyboard flags. returns FALSE if the LEDs could not
 // be updated (if keyboard data write did not succeed)
-static boolean update_kb_led(byte flags) {
+static bool update_kb_led(uint8 flags) {
     if (!send_kb_data(KEYBRD_CMD_SET_LED)) {
         dgl_set_error(DGL_KEYBOARD_UPDATE_LED_FAILURE);
-        return FALSE;
+        return false;
     }
     if (!send_kb_data((flags >> 4) & 3)) {
         dgl_set_error(DGL_KEYBOARD_UPDATE_LED_FAILURE);
-        return FALSE;
+        return false;
     }
 
-    return TRUE;
+    return true;
 }
 
 static void push_keyboard_event(KEY key, EVENT_ACTION action) {
@@ -235,16 +236,16 @@ static void push_keyboard_event(KEY key, EVENT_ACTION action) {
     }
 }
 
-// returns TRUE if the key interrupt event should not be handled (at least
+// returns true if the key interrupt event should not be handled (at least
 // as far as updating key state is concerned)
-static boolean handler_filter_keys(void) {
+static bool handler_filter_keys(void) {
     if (BIT_ISSET(KEYBRD_MOD_EXTENDED, key_mod)) {
         // extended key + leftshift comes with cursor key presses when
         // numlock is enabled
         if ((_key_scan & 0x7f) == KEY_LEFTSHIFT)
-            return TRUE;
+            return true;
     }
-    return FALSE;
+    return false;
 }
 
 // maintains BIOS keyboard flags/led toggle states (caps/num/scroll lock)
@@ -336,16 +337,16 @@ void interrupt far kb_int_handler(void) {
     }
 
     // indicate key event was processed to keyboard controller
-    _key_scan = inp(KEYBRD_CTRL_PORT) | 0x82;
+    _key_scan = inp(KEYBRD_CTRL_PORT) | 0x80;
     outp(KEYBRD_CTRL_PORT, _key_scan);
     outp(KEYBRD_CTRL_PORT, _key_scan & 0x7f);
     outp(PIC_CTRL_PORT, 0x20);
 }
 
-boolean keyboard_init(void) {
+bool keyboard_init(void) {
     if (_installed) {
         dgl_set_error(DGL_KEYBOARD_ALREADY_INITIALIZED);
-        return FALSE;
+        return false;
     }
 
     reset_key_states();
@@ -356,23 +357,23 @@ boolean keyboard_init(void) {
     _old_handler = _dos_getvect(9);
     _dos_setvect(9, kb_int_handler);
 
-    _installed = TRUE;
-    return TRUE;
+    _installed = true;
+    return true;
 }
 
-boolean keyboard_shutdown(void) {
+bool keyboard_shutdown(void) {
     if (!_installed)
-        return TRUE;  // don't care
+        return true;  // don't care
 
     _dos_setvect(9, _old_handler);
 
     reset_key_states();
 
-    _installed = FALSE;
-    return TRUE;
+    _installed = false;
+    return true;
 }
 
-boolean keyboard_is_initialized(void) {
+bool keyboard_is_initialized(void) {
     return _installed;
 }
 
@@ -389,7 +390,7 @@ void keyboard_wait_for_key(KEY key) {
     }
 }
 
-char key_to_char(KEY key, uword modifiers) {
+char key_to_char(KEY key, uint16 modifiers) {
     // this is really just here because of the stupid slash key on the numpad
     // (but maybe it will be useful for other types of keyboards later...)
     if (BIT_ISSET(KEYBRD_MOD_EXTENDED, modifiers)) {

DGLKBRD.H

@@ -1,10 +1,14 @@
-#ifndef DGL_DGLKYBRD_H_INCLUDED
-#define DGL_DGLKYBRD_H_INCLUDED
+#ifndef LIBDGL_DGLKYBRD_H
+#define LIBDGL_DGLKYBRD_H
 
 #include "dglcmn.h"
 #include "dglkeys.h"
 
-typedef byte KEY;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint8 KEY;
 
 #define KEYBRD_FLAGS_SCROLLOCK 0x10
 #define KEYBRD_FLAGS_NUMLOCK   0x20
@@ -15,43 +19,23 @@ typedef byte KEY;
 #define KEYBRD_MOD_NUMLOCK     0x4
 #define KEYBRD_MOD_CAPSLOCK    0x8
 
-/*
- * Current state of the keyboard.
- */
-extern volatile ubyte keys[128];
+extern volatile uint8 keys[128];
 
-extern volatile uword key_flags;
-extern volatile uword key_mod;
+extern volatile uint16 key_flags;
+extern volatile uint16 key_mod;
 
-/*
- * Installs a custom keyboard interrupt handler.
- * @return TRUE on success
- */
-boolean keyboard_init(void);
+bool keyboard_init(void);
+bool keyboard_shutdown(void);
+bool keyboard_is_initialized(void);
 
-/*
- * Removes a previously installed keyboard interrupt handler.
- * @return TRUE on success
- */
-boolean keyboard_shutdown(void);
-
-/*
- * @return TRUE if the custom keyboard interrupt handler is installed.
- */
-boolean keyboard_is_initialized(void);
-
-/*
- * Waits indefinitely until any key is pressed.
- * @return The key that was pressed.
- */
 KEY keyboard_read_key(void);
-
-/*
- * Waits indefinitely until the specified key is pressed.
- */
 void keyboard_wait_for_key(KEY key);
 
-char key_to_char(KEY key, uword modifiers);
+char key_to_char(KEY key, uint16 modifiers);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
 

DGLMATH.H

@@ -1,10 +1,14 @@
-#ifndef DGL_DGLMATH_H_INCLUDED
-#define DGL_DGLMATH_H_INCLUDED
+#ifndef LIBDGL_DGLMATH_H
+#define LIBDGL_DGLMATH_H
 
 #include "dglcmn.h"
 #include "dglvec2.h"
 #include <math.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define TOLERANCE                  0.00001f
 
 #define PI                         3.1415927f
@@ -34,18 +38,21 @@ float angle_between_f(float x1, float y1, float x2, float y2);
 int next_power_of_2(int n);
 void point_on_circle(float radius, float radians, float *x, float *y);
 
-static VECTOR2F direction_from_angle(float radians);
+static VEC2 direction_from_angle(float radians);
 static float round(float value);
 static float symmetrical_round(float value);
-static boolean close_enough(float a, float b, float tolerance);
-static boolean power_of_2(int n);
+static bool close_enough(float a, float b, float tolerance);
+static bool power_of_2(int n);
 static float smooth_step(float low, float high, float t);
 
 // --------------------------------------------------------------------------
 
-static VECTOR2F direction_from_angle(float radians) {
-    VECTOR2F direction;
-    point_on_circle(1.0f, radians, &direction.x, &direction.y);
+static VEC2 direction_from_angle(float radians) {
+    VEC2 direction;
+    float x, y;
+    point_on_circle(1.0f, radians, &x, &y);
+    direction.x = FTOFIX(x);
+    direction.y = FTOFIX(y);
     return direction;
 }
 
@@ -60,13 +67,13 @@ static float symmetrical_round(float value) {
         return ceil(value - 0.5f);
 }
 
-static boolean close_enough(float a, float b, float tolerance) {
+static bool close_enough(float a, float b, float tolerance) {
     //return fabs((a - b) / ((b == 0.0f) ? 1.0f : b)) < tolerance;
     // TODO: this is not the best way
     return fabs(a - b) <= tolerance;
 }
 
-static boolean power_of_2(int n) {
+static bool power_of_2(int n) {
     return (n != 0) && !(n & (n - 1));
 }
 
@@ -75,4 +82,8 @@ static float smooth_step(float low, float high, float t) {
     return LERP(low, high, (n * n) * (3.0f - (2.0f * n)));
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

DGLMOUSE.C

@@ -1,11 +1,11 @@
 #include "dglmouse.h"
+#include "dgl.h"
 #include "dglevent.h"
-#include "dglerror.h"
 #include <string.h>
 #include <dos.h>
 
-static boolean _installed = FALSE;
-static boolean _has_mouse = FALSE;
+static bool _installed = false;
+static bool _has_mouse = false;
 
 static INPUTEVENT *mouse_event;
 
@@ -25,7 +25,7 @@ static void reset_mouse_state(void) {
     mouse_prev_buttons = 0;
 }
 
-static boolean init_mouse_driver(void) {
+static bool init_mouse_driver(void) {
     union REGS regs;
 
     memset(&regs, 0, sizeof(regs));
@@ -112,21 +112,21 @@ void __loadds far mouse_int_handler(int eax, int ebx, int ecx, int edx) {
 }
 #pragma on (check_stack)
 
-boolean mouse_init(void) {
+bool mouse_init(void) {
     union REGS regs;
     struct SREGS sregs;
 
     if (_installed) {
         dgl_set_error(DGL_MOUSE_ALREADY_INITIALIZED);
-        return FALSE;
+        return false;
     }
 
     reset_mouse_state();
 
     _has_mouse = init_mouse_driver();
     if (!_has_mouse) {
-        _installed = TRUE;
-        return TRUE;
+        _installed = true;
+        return true;
     }
 
     update_mouse_state();
@@ -139,19 +139,19 @@ boolean mouse_init(void) {
     sregs.es = FP_SEG(mouse_int_handler);
     int386x(0x33, &regs, &regs, &sregs);
 
-    _installed = TRUE;
-    return TRUE;
+    _installed = true;
+    return true;
 }
 
-boolean mouse_shutdown(void) {
+bool mouse_shutdown(void) {
     union REGS regs;
 
     if (!_installed)
-        return TRUE;   // don't care
+        return true;   // don't care
 
     if (!_has_mouse) {
-        _installed = FALSE;
-        return TRUE;
+        _installed = false;
+        return true;
     }
 
     memset(&regs, 0, sizeof(regs));
@@ -162,15 +162,15 @@ boolean mouse_shutdown(void) {
     reset_mouse_state();
     init_mouse_driver();
 
-    _installed = FALSE;
-    return TRUE;
+    _installed = false;
+    return true;
 }
 
-boolean mouse_is_initialized(void) {
+bool mouse_is_initialized(void) {
     return _installed;
 }
 
-boolean mouse_is_present(void) {
+bool mouse_is_present(void) {
     return _has_mouse;
 }
 

DGLMOUSE.H

@@ -1,94 +1,43 @@
-#ifndef DGL_DGLMOUSE_H_INCLUDED
-#define DGL_DGLMOUSE_H_INCLUDED
+#ifndef LIBDGL_DGLMOUSE_H
+#define LIBDGL_DGLMOUSE_H
 
 #include "dglcmn.h"
 
-typedef byte MOUSE_BUTTON;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint8 MOUSE_BUTTON;
 
 #define MOUSE_LEFTBUTTON   0x01
 #define MOUSE_RIGHTBUTTON  0x02
 #define MOUSE_CENTERBUTTON 0x04
 
-/*
- * Current mouse cursor X position.
- */
 extern volatile int mouse_x;
-
-/*
- * Current mouse cursor Y position.
- */
 extern volatile int mouse_y;
-
-/*
- * Current state of mouse buttons.
- */
 extern volatile int mouse_buttons;
-
-/*
- * Amount the cursor moved along the X-axis since the last update.
- */
 extern volatile int mouse_delta_x;
-
-/*
- * Amount the cursor moved along the Y-axis since the last update.
- */
 extern volatile int mouse_delta_y;
 
-/*
- * Installs a custom mouse handler.
- * @return TRUE on success
- */
-boolean mouse_init(void);
-
-/*
- * Removes a previously installed mouse handler.
- * @return TRUE on success
- */
-boolean mouse_shutdown(void);
-
-/*
- * @return TRUE if the custom mouse handler is installed.
- */
-boolean mouse_is_initialized(void);
-
-/*
- * @return TRUE if the user's computer has a (recognized) mouse connected.
- */
-boolean mouse_is_present(void);
-
-/*
- * Shows the mouse cursor. If the mouse cursor is currently shown, this does
- * nothing.
- */
+bool mouse_init(void);
+bool mouse_shutdown(void);
+bool mouse_is_initialized(void);
+bool mouse_is_present(void);
 void mouse_show(void);
-
-/*
- * Hides the mouse cursor. If the mouse cursor is not currently shown, this
- * does nothing.
- */
 void mouse_hide(void);
-
-/*
- * Sets the pixel boundaries for the mouse cursor.
- * @param min_x left coordinate
- * @param max_x right coordinate
- * @param min_y top coordinate
- * @param max_y bottom coordinate
- */
 void mouse_set_bounds(int min_x, int min_y, int max_x, int max_y);
 
-/*
- * Returns the current status of the specified button.
- * @param button The button to check the status of.
- * @return TRUE if the button is pressed.
- */
-static boolean mouse_button(int button);
+static bool mouse_button(int button);
 
 // --------------------------------------------------------------------------
 
-static boolean mouse_button(int button) {
+static bool mouse_button(int button) {
     return (mouse_buttons & button) != 0;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLMTX33.H

@@ -1,10 +1,14 @@
-#ifndef DGL_DGLMAT33_H_INCLUDED
-#define DGL_DGLMAT33_H_INCLUDED
+#ifndef LIBDGL_DGLMTX33_H
+#define LIBDGL_DGLMTX33_H
 
-#include "dglcmn.h"
-#include "dglmath.h"
-#include "dglvec2.h"
 #include <math.h>
+#include "dglcmn.h"
+#include "dglfixp.h"
+#include "dglvec2.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #define _M33_11 0
 #define _M33_12 3
@@ -17,47 +21,54 @@
 #define _M33_33 8
 
 typedef struct {
-    float m[9];
-} MATRIX33;
+    fixed m[9];
+} MTX33;
 
-static MATRIX33 matrix33(float m11, float m12, float m13,
-                         float m21, float m22, float m23,
-                         float m31, float m32, float m33);
-static void matrix33_set(MATRIX33 *m,
-                         float m11, float m12, float m13,
-                         float m21, float m22, float m23,
-                         float m31, float m32, float m33);
+static MTX33 mtx33(
+    fixed m11, fixed m12, fixed m13,
+    fixed m21, fixed m22, fixed m23,
+    fixed m31, fixed m32, fixed m33
+);
 
-static MATRIX33 matrix33_from_euler_angles(float x, float y, float z);
-static MATRIX33 matrix33_rotation_x(float radians);
-static MATRIX33 matrix33_rotation_y(float radians);
-static MATRIX33 matrix33_rotation_z(float radians);
+static void mtx33_set(
+    MTX33 *m,
+    fixed m11, fixed m12, fixed m13,
+    fixed m21, fixed m22, fixed m23,
+    fixed m31, fixed m32, fixed m33
+);
 
-static MATRIX33 matrix33_add(MATRIX33 a, MATRIX33 b);
-static MATRIX33 matrix33_sub(MATRIX33 a, MATRIX33 b);
-static MATRIX33 matrix33_mul(MATRIX33 a, MATRIX33 b);
-static MATRIX33 matrix33_scale(MATRIX33 m, float scale);
+static MTX33 mtx33_from_angles(float x, float y, float z);
+static MTX33 mtx33_rotation_x(float radians);
+static MTX33 mtx33_rotation_y(float radians);
+static MTX33 mtx33_rotation_z(float radians);
 
-static float matrix33_determinant(MATRIX33 m);
-static MATRIX33 matrix33_inverse(MATRIX33 m);
-static MATRIX33 matrix33_transpose(MATRIX33 m);
-static VECTOR2F matrix33_transform(MATRIX33 m, VECTOR2F v);
+static MTX33 mtx33_add(MTX33 a, MTX33 b);
+static MTX33 mtx33_sub(MTX33 a, MTX33 b);
+static MTX33 mtx33_mul(MTX33 a, MTX33 b);
+static MTX33 mtx33_scale(MTX33 m, fixed scale);
 
-static MATRIX33 matrix33_translation_2d(float x, float y);
-static MATRIX33 matrix33_scaling_2d(float x, float y);
-static MATRIX33 matrix33_rotation_2d(float radians);
-static VECTOR2F matrix33_transform_2d(MATRIX33 m, VECTOR2F v);
+static fixed mtx33_determinant(MTX33 m);
+static MTX33 mtx33_inverse(MTX33 m);
+static MTX33 mtx33_transpose(MTX33 m);
+static VEC2 mtx33_transform(MTX33 m, VEC2 v);
 
-#define IDENTITY_MATRIX33 matrix33(1.0f, 0.0f, 0.0f, \
+static MTX33 mtx33_translation_2d(fixed x, fixed y);
+static MTX33 mtx33_scaling_2d(fixed x, fixed y);
+static MTX33 mtx33_rotation_2d(float radians);
+static VEC2 mtx33_transform_2d(MTX33 m, VEC2 v);
+
+#define IDENTITY_MTX33 mtx33(1.0f, 0.0f, 0.0f, \
                              0.0f, 1.0f, 0.0f, \
                              0.0f, 0.0f, 1.0f)
 
 // --------------------------------------------------------------------------
 
-static MATRIX33 matrix33(float m11, float m12, float m13,
-                         float m21, float m22, float m23,
-                         float m31, float m32, float m33) {
-    MATRIX33 result;
+static MTX33 mtx33(
+    fixed m11, fixed m12, fixed m13,
+    fixed m21, fixed m22, fixed m23,
+    fixed m31, fixed m32, fixed m33
+) {
+    MTX33 result;
     result.m[_M33_11] = m11;
     result.m[_M33_12] = m12;
     result.m[_M33_13] = m13;
@@ -70,10 +81,12 @@ static MATRIX33 matrix33(float m11, float m12, float m13,
     return result;
 }
 
-static void matrix33_set(MATRIX33 *m,
-                         float m11, float m12, float m13,
-                         float m21, float m22, float m23,
-                         float m31, float m32, float m33) {
+static void mtx33_set(
+    MTX33 *m,
+    fixed m11, fixed m12, fixed m13,
+    fixed m21, fixed m22, fixed m23,
+    fixed m31, fixed m32, fixed m33
+) {
     m->m[_M33_11] = m11;
     m->m[_M33_12] = m12;
     m->m[_M33_13] = m13;
@@ -85,82 +98,82 @@ static void matrix33_set(MATRIX33 *m,
     m->m[_M33_33] = m33;
 }
 
-static MATRIX33 matrix33_from_euler_angles(float x, float y, float z) {
-    MATRIX33 rx, ry, rz;
-    rx = matrix33_rotation_x(x);
-    ry = matrix33_rotation_y(y);
-    rz = matrix33_rotation_z(z);
-    return matrix33_mul(matrix33_mul(rz, ry), rx);
+static MTX33 mtx33_from_angles(float x, float y, float z) {
+    MTX33 rx, ry, rz;
+    rx = mtx33_rotation_x(x);
+    ry = mtx33_rotation_y(y);
+    rz = mtx33_rotation_z(z);
+    return mtx33_mul(mtx33_mul(rz, ry), rx);
 }
 
-static MATRIX33 matrix33_rotation_x(float radians) {
-    MATRIX33 result;
-    float s, c;
+static MTX33 mtx33_rotation_x(fixed radians) {
+    MTX33 result;
+    fixed s, c;
 
-    s = sin(radians);
-    c = cos(radians);
+    s = FTOFIX(sin(radians));
+    c = FTOFIX(cos(radians));
 
-    result.m[_M33_11] = 1.0f;
-    result.m[_M33_12] = 0.0f;
-    result.m[_M33_13] = 0.0f;
+    result.m[_M33_11] = FP_1;
+    result.m[_M33_12] = 0;
+    result.m[_M33_13] = 0;
 
-    result.m[_M33_21] = 0.0f;
+    result.m[_M33_21] = 0;
     result.m[_M33_22] = c;
     result.m[_M33_23] = -s;
 
-    result.m[_M33_31] = 0.0f;
+    result.m[_M33_31] = 0;
     result.m[_M33_32] = s;
     result.m[_M33_33] = c;
 
     return result;
 }
 
-static MATRIX33 matrix33_rotation_y(float radians) {
-    MATRIX33 result;
-    float s, c;
+static MTX33 mtx33_rotation_y(float radians) {
+    MTX33 result;
+    fixed s, c;
 
-    s = sin(radians);
-    c = cos(radians);
+    s = FTOFIX(sin(radians));
+    c = FTOFIX(cos(radians));
 
     result.m[_M33_11] = c;
-    result.m[_M33_12] = 0.0f;
+    result.m[_M33_12] = 0;
     result.m[_M33_13] = s;
 
-    result.m[_M33_21] = 0.0f;
-    result.m[_M33_22] = 1.0f;
-    result.m[_M33_23] = 0.0f;
+    result.m[_M33_21] = 0;
+    result.m[_M33_22] = FP_1;
+    result.m[_M33_23] = 0;
 
     result.m[_M33_31] = -s;
-    result.m[_M33_32] = 0.0f;
+    result.m[_M33_32] = 0;
     result.m[_M33_33] = c;
 
     return result;
 }
 
-static MATRIX33 matrix33_rotation_z(float radians) {
-    MATRIX33 result;
-    float s, c;
+static MTX33 mtx33_rotation_z(float radians) {
+    MTX33 result;
+    fixed s, c;
 
-    s = sin(radians);
-    c = cos(radians);
+    s = FTOFIX(sin(radians));
+    c = FTOFIX(cos(radians));
 
     result.m[_M33_11] = c;
     result.m[_M33_12] = -s;
-    result.m[_M33_13] = 0.0f;
+    result.m[_M33_13] = 0;
 
     result.m[_M33_21] = s;
     result.m[_M33_22] = c;
-    result.m[_M33_23] = 0.0f;
+    result.m[_M33_23] = 0;
 
-    result.m[_M33_31] = 0.0f;
-    result.m[_M33_32] = 0.0f;
-    result.m[_M33_33] = 1.0f;
+    result.m[_M33_31] = 0;
+    result.m[_M33_32] = 0;
+    result.m[_M33_33] = FP_1;
 
     return result;
 }
 
-static MATRIX33 matrix33_add(MATRIX33 a, MATRIX33 b) {
-    MATRIX33 result;
+static MTX33 mtx33_add(MTX33 a, MTX33 b) {
+    MTX33 result;
 
     result.m[_M33_11] = a.m[_M33_11] + b.m[_M33_11];
     result.m[_M33_12] = a.m[_M33_12] + b.m[_M33_12];
@@ -175,8 +188,8 @@ static MATRIX33 matrix33_add(MATRIX33 a, MATRIX33 b) {
     return result;
 }
 
-static MATRIX33 matrix33_sub(MATRIX33 a, MATRIX33 b) {
-    MATRIX33 result;
+static MTX33 mtx33_sub(MTX33 a, MTX33 b) {
+    MTX33 result;
 
     result.m[_M33_11] = a.m[_M33_11] - b.m[_M33_11];
     result.m[_M33_12] = a.m[_M33_12] - b.m[_M33_12];
@@ -191,75 +204,75 @@ static MATRIX33 matrix33_sub(MATRIX33 a, MATRIX33 b) {
     return result;
 }
 
-static MATRIX33 matrix33_mul(MATRIX33 a, MATRIX33 b) {
-    MATRIX33 result;
+static MTX33 mtx33_mul(MTX33 a, MTX33 b) {
+    MTX33 result;
 
-    result.m[_M33_11] = a.m[_M33_11] * b.m[_M33_11] + a.m[_M33_12] * b.m[_M33_21] + a.m[_M33_13] * b.m[_M33_31];
-    result.m[_M33_12] = a.m[_M33_11] * b.m[_M33_12] + a.m[_M33_12] * b.m[_M33_22] + a.m[_M33_13] * b.m[_M33_32];
-    result.m[_M33_13] = a.m[_M33_11] * b.m[_M33_13] + a.m[_M33_12] * b.m[_M33_23] + a.m[_M33_13] * b.m[_M33_33];
+    result.m[_M33_11] = fix_mul(a.m[_M33_11], b.m[_M33_11]) + fix_mul(a.m[_M33_12], b.m[_M33_21]) + fix_mul(a.m[_M33_13], b.m[_M33_31]);
+    result.m[_M33_12] = fix_mul(a.m[_M33_11], b.m[_M33_12]) + fix_mul(a.m[_M33_12], b.m[_M33_22]) + fix_mul(a.m[_M33_13], b.m[_M33_32]);
+    result.m[_M33_13] = fix_mul(a.m[_M33_11], b.m[_M33_13]) + fix_mul(a.m[_M33_12], b.m[_M33_23]) + fix_mul(a.m[_M33_13], b.m[_M33_33]);
 
-    result.m[_M33_21] = a.m[_M33_21] * b.m[_M33_11] + a.m[_M33_22] * b.m[_M33_21] + a.m[_M33_23] * b.m[_M33_31];
-    result.m[_M33_22] = a.m[_M33_21] * b.m[_M33_12] + a.m[_M33_22] * b.m[_M33_22] + a.m[_M33_23] * b.m[_M33_32];
-    result.m[_M33_23] = a.m[_M33_21] * b.m[_M33_13] + a.m[_M33_22] * b.m[_M33_23] + a.m[_M33_23] * b.m[_M33_33];
+    result.m[_M33_21] = fix_mul(a.m[_M33_21], b.m[_M33_11]) + fix_mul(a.m[_M33_22], b.m[_M33_21]) + fix_mul(a.m[_M33_23], b.m[_M33_31]);
+    result.m[_M33_22] = fix_mul(a.m[_M33_21], b.m[_M33_12]) + fix_mul(a.m[_M33_22], b.m[_M33_22]) + fix_mul(a.m[_M33_23], b.m[_M33_32]);
+    result.m[_M33_23] = fix_mul(a.m[_M33_21], b.m[_M33_13]) + fix_mul(a.m[_M33_22], b.m[_M33_23]) + fix_mul(a.m[_M33_23], b.m[_M33_33]);
 
-    result.m[_M33_31] = a.m[_M33_31] * b.m[_M33_11] + a.m[_M33_32] * b.m[_M33_21] + a.m[_M33_33] * b.m[_M33_31];
-    result.m[_M33_32] = a.m[_M33_31] * b.m[_M33_12] + a.m[_M33_32] * b.m[_M33_22] + a.m[_M33_33] * b.m[_M33_32];
-    result.m[_M33_33] = a.m[_M33_31] * b.m[_M33_13] + a.m[_M33_32] * b.m[_M33_23] + a.m[_M33_33] * b.m[_M33_33];
+    result.m[_M33_31] = fix_mul(a.m[_M33_31], b.m[_M33_11]) + fix_mul(a.m[_M33_32], b.m[_M33_21]) + fix_mul(a.m[_M33_33], b.m[_M33_31]);
+    result.m[_M33_32] = fix_mul(a.m[_M33_31], b.m[_M33_12]) + fix_mul(a.m[_M33_32], b.m[_M33_22]) + fix_mul(a.m[_M33_33], b.m[_M33_32]);
+    result.m[_M33_33] = fix_mul(a.m[_M33_31], b.m[_M33_13]) + fix_mul(a.m[_M33_32], b.m[_M33_23]) + fix_mul(a.m[_M33_33], b.m[_M33_33]);
 
     return result;
 }
 
-static MATRIX33 matrix33_scale(MATRIX33 m, float scale) {
-    MATRIX33 result;
+static MTX33 mtx33_scale(MTX33 m, fixed scale) {
+    MTX33 result;
 
-    result.m[_M33_11] = m.m[_M33_11] * scale;
-    result.m[_M33_12] = m.m[_M33_12] * scale;
-    result.m[_M33_13] = m.m[_M33_13] * scale;
-    result.m[_M33_21] = m.m[_M33_21] * scale;
-    result.m[_M33_22] = m.m[_M33_22] * scale;
-    result.m[_M33_23] = m.m[_M33_23] * scale;
-    result.m[_M33_31] = m.m[_M33_31] * scale;
-    result.m[_M33_32] = m.m[_M33_32] * scale;
-    result.m[_M33_33] = m.m[_M33_33] * scale;
+    result.m[_M33_11] = fix_mul(m.m[_M33_11], scale);
+    result.m[_M33_12] = fix_mul(m.m[_M33_12], scale);
+    result.m[_M33_13] = fix_mul(m.m[_M33_13], scale);
+    result.m[_M33_21] = fix_mul(m.m[_M33_21], scale);
+    result.m[_M33_22] = fix_mul(m.m[_M33_22], scale);
+    result.m[_M33_23] = fix_mul(m.m[_M33_23], scale);
+    result.m[_M33_31] = fix_mul(m.m[_M33_31], scale);
+    result.m[_M33_32] = fix_mul(m.m[_M33_32], scale);
+    result.m[_M33_33] = fix_mul(m.m[_M33_33], scale);
 
     return result;
 }
 
-static float matrix33_determinant(MATRIX33 m) {
+static fixed mtx33_determinant(MTX33 m) {
     return
-        m.m[_M33_11] * m.m[_M33_22] * m.m[_M33_33] +
-        m.m[_M33_12] * m.m[_M33_23] * m.m[_M33_31] +
-        m.m[_M33_13] * m.m[_M33_21] * m.m[_M33_32] -
-        m.m[_M33_11] * m.m[_M33_23] * m.m[_M33_32] -
-        m.m[_M33_12] * m.m[_M33_21] * m.m[_M33_33] -
-        m.m[_M33_13] * m.m[_M33_22] * m.m[_M33_31];
+        fix_mul(m.m[_M33_11], fix_mul(m.m[_M33_22], m.m[_M33_33])) +
+        fix_mul(m.m[_M33_12], fix_mul(m.m[_M33_23], m.m[_M33_31])) +
+        fix_mul(m.m[_M33_13], fix_mul(m.m[_M33_21], m.m[_M33_32])) -
+        fix_mul(m.m[_M33_11], fix_mul(m.m[_M33_23], m.m[_M33_32])) -
+        fix_mul(m.m[_M33_12], fix_mul(m.m[_M33_21], m.m[_M33_33])) -
+        fix_mul(m.m[_M33_13], fix_mul(m.m[_M33_22], m.m[_M33_31]));
 }
 
-static MATRIX33 matrix33_inverse(MATRIX33 m) {
-    float d;
-    MATRIX33 result;
-    d = matrix33_determinant(m);
-    if (close_enough(d, 0.0f, TOLERANCE))
-        return IDENTITY_MATRIX33;
+static MTX33 mtx33_inverse(MTX33 m) {
+    fixed d;
+    MTX33 result;
+    d = mtx33_determinant(m);
+    if (d == 0)
+        return IDENTITY_MTX33;
     else {
-        d = 1.0f / d;
+        d = fix_div(FP_1, d);
 
-        result.m[_M33_11] = d * (m.m[_M33_22] * m.m[_M33_33] - m.m[_M33_32] * m.m[_M33_23]);
-        result.m[_M33_21] = d * (m.m[_M33_31] * m.m[_M33_23] - m.m[_M33_21] * m.m[_M33_33]);
-        result.m[_M33_31] = d * (m.m[_M33_21] * m.m[_M33_32] - m.m[_M33_31] * m.m[_M33_22]);
-        result.m[_M33_21] = d * (m.m[_M33_32] * m.m[_M33_13] - m.m[_M33_12] * m.m[_M33_33]);
-        result.m[_M33_22] = d * (m.m[_M33_11] * m.m[_M33_33] - m.m[_M33_31] * m.m[_M33_13]);
-        result.m[_M33_23] = d * (m.m[_M33_31] * m.m[_M33_12] - m.m[_M33_11] * m.m[_M33_32]);
-        result.m[_M33_31] = d * (m.m[_M33_12] * m.m[_M33_23] - m.m[_M33_22] * m.m[_M33_13]);
-        result.m[_M33_32] = d * (m.m[_M33_21] * m.m[_M33_13] - m.m[_M33_11] * m.m[_M33_23]);
-        result.m[_M33_33] = d * (m.m[_M33_11] * m.m[_M33_22] - m.m[_M33_21] * m.m[_M33_12]);
+        result.m[_M33_11] = fix_mul(d, (fix_mul(m.m[_M33_22], m.m[_M33_33]) - fix_mul(m.m[_M33_32], m.m[_M33_23])));
+        result.m[_M33_21] = fix_mul(d, (fix_mul(m.m[_M33_31], m.m[_M33_23]) - fix_mul(m.m[_M33_21], m.m[_M33_33])));
+        result.m[_M33_31] = fix_mul(d, (fix_mul(m.m[_M33_21], m.m[_M33_32]) - fix_mul(m.m[_M33_31], m.m[_M33_22])));
+        result.m[_M33_21] = fix_mul(d, (fix_mul(m.m[_M33_32], m.m[_M33_13]) - fix_mul(m.m[_M33_12], m.m[_M33_33])));
+        result.m[_M33_22] = fix_mul(d, (fix_mul(m.m[_M33_11], m.m[_M33_33]) - fix_mul(m.m[_M33_31], m.m[_M33_13])));
+        result.m[_M33_23] = fix_mul(d, (fix_mul(m.m[_M33_31], m.m[_M33_12]) - fix_mul(m.m[_M33_11], m.m[_M33_32])));
+        result.m[_M33_31] = fix_mul(d, (fix_mul(m.m[_M33_12], m.m[_M33_23]) - fix_mul(m.m[_M33_22], m.m[_M33_13])));
+        result.m[_M33_32] = fix_mul(d, (fix_mul(m.m[_M33_21], m.m[_M33_13]) - fix_mul(m.m[_M33_11], m.m[_M33_23])));
+        result.m[_M33_33] = fix_mul(d, (fix_mul(m.m[_M33_11], m.m[_M33_22]) - fix_mul(m.m[_M33_21], m.m[_M33_12])));
 
         return result;
     }
 }
 
-static MATRIX33 matrix33_transpose(MATRIX33 m) {
-    MATRIX33 result;
+static MTX33 mtx33_transpose(MTX33 m) {
+    MTX33 result;
 
     result.m[_M33_11] = m.m[_M33_11];
     result.m[_M33_12] = m.m[_M33_21];
@@ -276,65 +289,69 @@ static MATRIX33 matrix33_transpose(MATRIX33 m) {
     return result;
 }
 
-static VECTOR2F matrix33_transform(MATRIX33 m, VECTOR2F v) {
-    VECTOR2F result;
+static VEC2 mtx33_transform(MTX33 m, VEC2 v) {
+    VEC2 result;
 
-    result.x = v.x * m.m[_M33_11] + v.y * m.m[_M33_12] + m.m[_M33_13];
-    result.y = v.x * m.m[_M33_21] + v.y * m.m[_M33_22] + m.m[_M33_23];
+    result.x = fix_mul(v.x, m.m[_M33_11]) + fix_mul(v.y, m.m[_M33_12]) + m.m[_M33_13];
+    result.y = fix_mul(v.x, m.m[_M33_21]) + fix_mul(v.y, m.m[_M33_22]) + m.m[_M33_23];
 
     return result;
 }
 
-static MATRIX33 matrix33_translation_2d(float x, float y) {
-    MATRIX33 result;
+static MTX33 mtx33_translation_2d(fixed x, fixed y) {
+    MTX33 result;
 
-    result.m[_M33_11] = 1.0f;
-    result.m[_M33_12] = 0.0f;
-    result.m[_M33_13] = 0.0f;
+    result.m[_M33_11] = FP_1;
+    result.m[_M33_12] = 0;
+    result.m[_M33_13] = 0;
 
-    result.m[_M33_21] = 0.0f;
-    result.m[_M33_22] = 1.0f;
-    result.m[_M33_23] = 0.0f;
+    result.m[_M33_21] = 0;
+    result.m[_M33_22] = FP_1;
+    result.m[_M33_23] = 0;
 
     result.m[_M33_31] = x;
     result.m[_M33_32] = y;
-    result.m[_M33_33] = 1.0f;
+    result.m[_M33_33] = FP_1;
 
     return result;
 }
 
-static MATRIX33 matrix33_scaling_2d(float x, float y) {
-    MATRIX33 result;
+static MTX33 mtx33_scaling_2d(fixed x, fixed y) {
+    MTX33 result;
 
     result.m[_M33_11] = x;
-    result.m[_M33_12] = 0.0f;
-    result.m[_M33_13] = 0.0f;
+    result.m[_M33_12] = 0;
+    result.m[_M33_13] = 0;
 
-    result.m[_M33_21] = 0.0f;
+    result.m[_M33_21] = 0;
     result.m[_M33_22] = y;
-    result.m[_M33_23] = 0.0f;
+    result.m[_M33_23] = 0;
 
-    result.m[_M33_31] = 0.0f;
-    result.m[_M33_32] = 0.0f;
-    result.m[_M33_33] = 1.0f;
+    result.m[_M33_31] = 0;
+    result.m[_M33_32] = 0;
+    result.m[_M33_33] = FP_1;
 
     return result;
 }
 
-static MATRIX33 matrix33_rotation_2d(float radians) {
-    return matrix33_rotation_z(radians);
+static MTX33 mtx33_rotation_2d(float radians) {
+    return mtx33_rotation_z(radians);
 }
 
-static VECTOR2F matrix33_transform_2d(MATRIX33 m, VECTOR2F v) {
-    VECTOR2F result;
+static VEC2 mtx33_transform_2d(MTX33 m, VEC2 v) {
+    VEC2 result;
 
-    result.x = v.x * m.m[_M33_11] + v.y * m.m[_M33_12] + m.m[_M33_13];
-    result.y = v.x * m.m[_M33_21] + v.y * m.m[_M33_22] + m.m[_M33_23];
+    result.x = fix_mul(v.x, m.m[_M33_11]) + fix_mul(v.y, m.m[_M33_12]) + m.m[_M33_13];
+    result.y = fix_mul(v.x, m.m[_M33_21]) + fix_mul(v.y, m.m[_M33_22]) + m.m[_M33_23];
     result.x += m.m[_M33_31];
     result.y += m.m[_M33_32];
 
     return result;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLPAL.C

@@ -1,9 +1,10 @@
 #include "dglpal.h"
 #include "dglgfx.h"
-#include <stdlib.h>
+#include <conio.h>
 #include <dos.h>
+#include <stdlib.h>
 
-void pal_set_color(byte color, byte r, byte g, byte b) {
+void pal_set_color(uint8 color, uint8 r, uint8 g, uint8 b) {
     outp(0x3c6, 0xff);
     outp(0x3c8, color);
     outp(0x3c9, r);
@@ -11,7 +12,7 @@ void pal_set_color(byte color, byte r, byte g, byte b) {
     outp(0x3c9, b);
 }
 
-void pal_get_color(byte color, byte *r, byte *g, byte *b) {
+void pal_get_color(uint8 color, uint8 *r, uint8 *g, uint8 *b) {
     outp(0x3c6, 0xff);
     outp(0x3c7, color);
     *r = inp(0x3c9);
@@ -19,7 +20,7 @@ void pal_get_color(byte color, byte *r, byte *g, byte *b) {
     *b = inp(0x3c9);
 }
 
-void pal_set(const byte *palette) {
+void pal_set(const uint8 *palette) {
     int i = 0;
     for (i = 0; i < 256; ++i) {
         pal_set_color(i, palette[0], palette[1], palette[2]);
@@ -27,7 +28,7 @@ void pal_set(const byte *palette) {
     }
 }
 
-void pal_get(byte *palette) {
+void pal_get(uint8 *palette) {
     int i = 0;
     for (i = 0; i < 256; ++i) {
         pal_get_color(i, palette, palette + 1, palette + 2);
@@ -35,38 +36,38 @@ void pal_get(byte *palette) {
     }
 }
 
-static boolean fade_color(int color, byte r, byte g, byte b, int step) {
-    byte red, green, blue;
-    byte diff_r, diff_g, diff_b;
-    boolean color_diff = FALSE;
+static bool fade_color(uint8 color, uint8 r, uint8 g, uint8 b, int step) {
+    uint8 red, green, blue;
+    uint8 diff_r, diff_g, diff_b;
+    bool color_diff = false;
 
     pal_get_color(color, &red, &green, &blue);
 
     if (red != r) {
-        color_diff = TRUE;
+        color_diff = true;
         diff_r = abs(red - r);
         if (red > r)
-            red -= min(step, diff_r);
+            red -= MIN(step, diff_r);
         else
-            red += min(step, diff_r);
+            red += MIN(step, diff_r);
     }
 
     if (green != g) {
-        color_diff = TRUE;
+        color_diff = true;
         diff_g = abs(green - g);
         if (green > g)
-            green -= min(step, diff_g);
+            green -= MIN(step, diff_g);
         else
-            green += min(step, diff_g);
+            green += MIN(step, diff_g);
     }
 
     if (blue != b) {
-        color_diff = TRUE;
+        color_diff = true;
         diff_b = abs(blue - b);
         if (blue > b)
-            blue -= min(step, diff_b);
+            blue -= MIN(step, diff_b);
         else
-            blue += min(step, diff_b);
+            blue += MIN(step, diff_b);
     }
 
     if (color_diff)
@@ -75,34 +76,46 @@ static boolean fade_color(int color, byte r, byte g, byte b, int step) {
     return (red == r && green == g && blue == b);
 }
 
-void pal_fade_range_to_color(int start, int end, byte r, byte g, byte b, int step) {
+void pal_fade_range_to_color(
+    uint8 start,
+    uint8 end,
+    uint8 r,
+    uint8 g,
+    uint8 b,
+    int step
+) {
     int i;
-    boolean done = FALSE;
+    bool done = false;
 
     step = abs(step);
 
     while (!done) {
-        done = TRUE;
-        video_wait_vsync();
+        done = true;
+        wait_vsync();
         for (i = start; i <= end; ++i) {
             if (!fade_color(i, r, g, b, step))
-                done = FALSE;
+                done = false;
         }
     }
 }
 
-void pal_fade_range_to_palette(int start, int end, const byte *palette, int step) {
+void pal_fade_range_to_palette(
+    uint8 start,
+    uint8 end,
+    const uint8 *palette,
+    int step
+) {
     int color, i;
-    boolean done = FALSE;
+    bool done = false;
 
     step = abs(step);
 
     while (!done) {
-        done = TRUE;
-        video_wait_vsync();
+        done = true;
+        wait_vsync();
         for (i = (start * 3), color = start; color <= end; ++color, i += 3) {
             if (!fade_color(color, palette[i], palette[i + 1], palette[i + 2], step))
-                done = FALSE;
+                done = false;
         }
     }
 }

DGLPAL.H

@@ -1,27 +1,49 @@
-#ifndef DGL_DGLPAL_H_INCLUDED
-#define DGL_DGLPAL_H_INCLUDED
+#ifndef LIBDGL_DGLPAL_H
+#define LIBDGL_DGLPAL_H
 
 #include "dglcmn.h"
 
-void pal_set_color(byte color, byte r, byte g, byte b);
-void pal_get_color(byte color, byte *r, byte *g, byte *b);
-void pal_set(const byte *palette);
-void pal_get(byte *palette);
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-void pal_fade_range_to_color(int start, int end, byte r, byte g, byte b, int step);
-void pal_fade_range_to_palette(int start, int end, const byte *palette, int step);
-static void pal_fade_to_color(byte r, byte g, byte b, int step);
-static void pal_fade_to_palette(const byte *palette, int step);
+void pal_set_color(uint8 color, uint8 r, uint8 g, uint8 b);
+void pal_get_color(uint8 color, uint8 *r, uint8 *g, uint8 *b);
+void pal_set(const uint8 *palette);
+void pal_get(uint8 *palette);
+
+void pal_fade_range_to_color(
+    uint8 start,
+    uint8 end,
+    uint8 r,
+    uint8 g,
+    uint8 b,
+    int step
+);
+
+void pal_fade_range_to_palette(
+    uint8 start,
+    uint8 end,
+    const uint8 *palette,
+    int step
+);
+
+static void pal_fade_to_color(uint8 r, uint8 g, uint8 b, int step);
+static void pal_fade_to_palette(const uint8 *palette, int step);
 
 // --------------------------------------------------------------------------
 
-static void pal_fade_to_color(byte r, byte g, byte b, int step) {
+static void pal_fade_to_color(uint8 r, uint8 g, uint8 b, int step) {
     pal_fade_range_to_color(0, 255, r, g, b, step);
 }
 
-static void pal_fade_to_palette(const byte *palette, int step) {
+static void pal_fade_to_palette(const uint8 *palette, int step) {
     pal_fade_range_to_palette(0, 255, palette, step);
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLPCX.C

@@ -1,38 +1,37 @@
+#include "dgl.h"
 #include "dglpcx.h"
 #include "dglgfx.h"
 #include "dglpal.h"
-#include "dgldraw.h"
-#include "dglerror.h"
 #include <stdio.h>
 #include <string.h>
 
 typedef struct {
-    byte manufacturer;
-    byte version;
-    byte encoding;
-    byte bpp;
-    word x;
-    word y;
-    word width;
-    word height;
-    word horizontal_dpi;
-    word vertical_dpi;
-    byte ega_palette[48];
-    byte reserved;
-    byte num_color_planes;
-    word bytes_per_line;
-    word palette_type;
-    word horizontal_size;
-    word vertical_size;
-    byte padding[54];
+    uint8  manufacturer;
+    uint8  version;
+    uint8  encoding;
+    uint8  bpp;
+    uint16 x;
+    uint16 y;
+    uint16 width;
+    uint16 height;
+    uint16 horizontal_dpi;
+    uint16 vertical_dpi;
+    uint8  ega_palette[48];
+    uint8  reserved;
+    uint8  num_color_planes;
+    uint16 bytes_per_line;
+    uint16 palette_type;
+    uint16 horizontal_size;
+    uint16 vertical_size;
+    uint8  padding[54];
 } PCX_HEADER;
 
-SURFACE* pcx_load(const char *filename, byte *pcx_palette) {
+SURFACE* pcx_load(const char *filename, uint8 *pcx_palette) {
     FILE *fp;
     PCX_HEADER header;
     int i, n, count, x, y;
     SURFACE *pcx;
-    ubyte data;
+    uint8 data;
 
     fp = fopen(filename, "rb");
     if (!fp) {
@@ -107,34 +106,34 @@ pcx_load_error:
     return NULL;
 }
 
-static boolean write_pcx_data(FILE *fp, int run_count, byte pixel) {
+static bool write_pcx_data(FILE *fp, int run_count, uint8 pixel) {
     int n;
 
     if ((run_count > 1) || ((pixel & 0xc0) == 0xc0)) {
         n = fputc(0xc0 | run_count, fp);
         if (n == -1)
-            return FALSE;
+            return false;
     }
     n = fputc(pixel, fp);
     if (n == -1)
-        return FALSE;
+        return false;
 
-    return TRUE;
+    return true;
 }
 
-boolean pcx_save(const char *filename, const SURFACE *src, const byte *palette) {
+bool pcx_save(const char *filename, const SURFACE *src, const uint8 *palette) {
     FILE *fp;
     int i, n, x, y;
     int run_count;
-    byte pixel, run_pixel;
-    byte r, g, b;
-    boolean result;
+    uint8 pixel, run_pixel;
+    uint8 r, g, b;
+    bool result;
     PCX_HEADER header;
 
     fp = fopen(filename, "wb");
     if (!fp) {
         dgl_set_error(DGL_IO_ERROR);
-        return FALSE;
+        return false;
     }
 
     memset(&header, 0, sizeof(PCX_HEADER));
@@ -220,11 +219,11 @@ boolean pcx_save(const char *filename, const SURFACE *src, const byte *palette)
     }
 
     fclose(fp);
-    return TRUE;
+    return true;
 
 pcx_save_error:
     dgl_set_error(DGL_IO_ERROR);
     fclose(fp);
-    return FALSE;
+    return false;
 }
 

DGLPCX.H

@@ -1,11 +1,19 @@
-#ifndef DGL_DGLPCX_H_INCLUDED
-#define DGL_DGLPCX_H_INCLUDED
+#ifndef LIBDGL_DGLPCX_H
+#define LIBDGL_DGLPCX_H
 
 #include "dglcmn.h"
 #include "dglgfx.h"
 
-SURFACE* pcx_load(const char *filename, byte *pcx_palette);
-boolean pcx_save(const char *filename, const SURFACE *src, const byte *palette);
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+SURFACE* pcx_load(const char *filename, uint8 *pcx_palette);
+bool pcx_save(const char *filename, const SURFACE *src, const uint8 *palette);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
 

DGLRECT.H

@@ -1,5 +1,9 @@
-#ifndef DGL_DGLRECT_H_INCLUDED
-#define DGL_DGLRECT_H_INCLUDED
+#ifndef LIBDGL_DGLRECT_H
+#define LIBDGL_DGLRECT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 typedef struct {
     int x;
@@ -37,5 +41,9 @@ static int rect_bottom(const RECT *r) {
         return r->y;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLUTIL.C

@@ -4,11 +4,11 @@
 #define SYS_CLOCKS_PER_SEC (1000.0f / 55.0f)
 
 
-int sys_clock() {
-    return *((int*)0x046c);
+uint32 sys_clock() {
+    return *((uint32*)0x046c);
 }
 
-float clock_ticks_to_seconds(int clocks) {
+float clock_ticks_to_seconds(uint32 clocks) {
     return clocks / (float)SYS_CLOCKS_PER_SEC;
 }
 

DGLUTIL.H

@@ -1,8 +1,12 @@
-#ifndef DGL_DGLUTIL_H_INCLUDED
-#define DGL_DGLUTIL_H_INCLUDED
+#ifndef LIBDGL_DGLUTIL_H
+#define LIBDGL_DGLUTIL_H
 
 #include "dglcmn.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SWAP(type, a, b) \
     do {                 \
         type __tmp = a;  \
@@ -12,8 +16,8 @@
 
 #define SIGN(x) (((x) < 0) ? -1 : (((x) > 0) ? 1 : 0))
 
-int sys_clock();
-float clock_ticks_to_seconds(int clocks);
+uint32 sys_clock();
+float clock_ticks_to_seconds(uint32 clocks);
 
 int rnd_int(int low, int high);
 float rnd_float(float low, float high);
@@ -24,57 +28,56 @@ void int_enable(void);
 void int_disable(void);
 #pragma aux int_disable = "cli"
 
-int fill32(byte value);
+int32 fill32(uint8 value);
 #pragma aux fill32 = \
     "mov ah, al"     \
     "shl eax, 8"     \
     "mov al, ah"     \
     "shl eax, 8"     \
     "mov al, ah"     \
-    parm [eax]       \
+    parm [al]        \
     value [eax];
 
-void REP_MOVSD(const void *src, void *dest, int num_dwords);
+void REP_MOVSD(const void *src, void *dest, uint32 num_dwords);
 #pragma aux REP_MOVSD =    \
     "cld"                  \
     "rep movsd"            \
     parm [esi] [edi] [ecx];
 
-void REP_MOVSB(const void *src, void *dest, int num_bytes);
+void REP_MOVSB(const void *src, void *dest, uint32 num_bytes);
 #pragma aux REP_MOVSB =    \
     "cld"                  \
     "rep movsb"            \
     parm [esi] [edi] [ecx];
 
-void REP_STOSD(int value, void *dest, int num_dwords);
+void REP_STOSD(uint32 value, void *dest, uint32 num_dwords);
 #pragma aux REP_STOSD =    \
     "cld"                  \
     "rep stosd"            \
     parm [eax] [edi] [ecx];
 
-void REP_STOSB(int value, void *dest, int num_bytes);
+void REP_STOSB(uint32 value, void *dest, uint32 num_bytes);
 #pragma aux REP_STOSB =    \
     "cld"                  \
     "rep stosb"            \
     parm [eax] [edi] [ecx];
 
-void mem_fill(void *dest, byte value, int num_bytes);
+void mem_fill(void *dest, uint8 value, uint32 num_bytes);
 #pragma aux mem_fill =       \
     "mov ah, al"             \
-    "shl eax, 8"             \
-    "mov al, ah"             \
-    "shl eax, 8"             \
-    "mov al, ah"             \
+    "mov bx, ax"             \
+    "shl eax, 16"            \
+    "mov ax, bx"             \
     "mov ebx, ecx"           \
     "shr ecx, 2"             \
     "and ebx, 3"             \
     "rep stosd"              \
     "mov ecx, ebx"           \
     "rep stosb"              \
-    parm [edi] [eax] [ecx]   \
+    parm [edi] [al] [ecx]    \
     modify [eax ebx ecx edi];
 
-void mem_fill32(void *dest, int value, int num_bytes);
+void mem_fill32(void *dest, uint32 value, uint32 num_bytes);
 #pragma aux mem_fill32 =     \
     "mov ebx, ecx"           \
     "shr ecx, 2"             \
@@ -85,7 +88,7 @@ void mem_fill32(void *dest, int value, int num_bytes);
     parm [edi] [eax] [ecx]   \
     modify [eax ebx ecx edi];
 
-void mem_copy(void *dest, const void *src, int num_bytes);
+void mem_copy(void *dest, const void *src, uint32 num_bytes);
 #pragma aux mem_copy =     \
     "mov ebx, ecx"         \
     "shr ecx, 2"           \
@@ -96,5 +99,9 @@ void mem_copy(void *dest, const void *src, int num_bytes);
     parm [edi] [esi] [ecx] \
     modify [eax ebx ecx];
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

DGLVEC2.H

@@ -1,436 +1,294 @@
-#ifndef DGL_DGLVEC2_H_INCLUDED
-#define DGL_DGLVEC2_H_INCLUDED
+#ifndef LIBDGL_DGLVEC2_H
+#define LIBDGL_DGLVEC2_H
 
 #include <math.h>
 #include "dglcmn.h"
 #include "dglfixp.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 typedef struct {
     int x;
     int y;
-} VECTOR2I;
+} VEC2I;
 
-static VECTOR2I vector2i(int x, int y);
-static void vector2i_set(VECTOR2I *v, int x, int y);
-static boolean vector2i_equals(VECTOR2I a, VECTOR2I b);
-static VECTOR2I vector2i_add(VECTOR2I a, VECTOR2I b);
-static VECTOR2I vector2i_sub(VECTOR2I a, VECTOR2I b);
-static VECTOR2I vector2i_mul(VECTOR2I a, VECTOR2I b);
-static VECTOR2I vector2i_muls(VECTOR2I v, int n);
-static VECTOR2I vector2i_div(VECTOR2I a, VECTOR2I b);
-static VECTOR2I vector2i_divs(VECTOR2I v, int n);
-static int vector2i_distance(VECTOR2I a, VECTOR2I b);
-static int vector2i_distancesq(VECTOR2I a, VECTOR2I b);
-static int vector2i_dot(VECTOR2I a, VECTOR2I b);
-static int vector2i_length(VECTOR2I v);
-static int vector2i_lengthsq(VECTOR2I v);
-static VECTOR2I vector2i_lerp(VECTOR2I a, VECTOR2I b, float lerp);
+static VEC2I vec2i(int x, int y);
+static void vec2i_set(VEC2I *v, int x, int y);
+static bool vec2i_equals(VEC2I a, VEC2I b);
+static VEC2I vec2i_add(VEC2I a, VEC2I b);
+static VEC2I vec2i_sub(VEC2I a, VEC2I b);
+static VEC2I vec2i_mul(VEC2I a, VEC2I b);
+static VEC2I vec2i_muls(VEC2I v, int n);
+static VEC2I vec2i_div(VEC2I a, VEC2I b);
+static VEC2I vec2i_divs(VEC2I v, int n);
+static int vec2i_distance(VEC2I a, VEC2I b);
+static int vec2i_distancesq(VEC2I a, VEC2I b);
+static int vec2i_dot(VEC2I a, VEC2I b);
+static int vec2i_length(VEC2I v);
+static int vec2i_lengthsq(VEC2I v);
+static VEC2I vec2i_lerp(VEC2I a, VEC2I b, float lerp);
 
-#define ZERO_VECTOR2I   vector2i(0, 0)
-#define UP_VECTOR2I     vector2i(0, -1);
-#define DOWN_VECTOR2I   vector2i(0, 1);
-#define LEFT_VECTOR2I   vector2i(-1, 0);
-#define RIGHT_VECTOR2I  vector2i(1, 0);
-#define UNIT_X_VECTOR2I vector2i(1, 0);
-#define UNIT_Y_VECTOR2I vector2i(0, 1);
-
-
-typedef struct {
-    float x;
-    float y;
-} VECTOR2F;
-
-static VECTOR2F vector2f(float x, float y);
-static void vector2f_set(VECTOR2F *v, float x, float y);
-static boolean vector2f_equals(VECTOR2F a, VECTOR2F b);
-static VECTOR2F vector2f_add(VECTOR2F a, VECTOR2F b);
-static VECTOR2F vector2f_sub(VECTOR2F a, VECTOR2F b);
-static VECTOR2F vector2f_mul(VECTOR2F a, VECTOR2F b);
-static VECTOR2F vector2f_muls(VECTOR2F v, float n);
-static VECTOR2F vector2f_div(VECTOR2F a, VECTOR2F b);
-static VECTOR2F vector2f_divs(VECTOR2F v, float n);
-static float vector2f_distance(VECTOR2F a, VECTOR2F b);
-static float vector2f_distancesq(VECTOR2F a, VECTOR2F b);
-static float vector2f_dot(VECTOR2F a, VECTOR2F b);
-static float vector2f_length(VECTOR2F v);
-static float vector2f_lengthsq(VECTOR2F v);
-static VECTOR2F vector2f_normalize(VECTOR2F v);
-static VECTOR2F vector2f_set_length(VECTOR2F v, float length);
-static VECTOR2F vector2f_lerp(VECTOR2F a, VECTOR2F b, float lerp);
-
-#define ZERO_VECTOR2F   vector2f(0.0f, 0.0f)
-#define UP_VECTOR2F     vector2f(0.0f, -1.0f);
-#define DOWN_VECTOR2F   vector2f(0.0f, 1.0f);
-#define LEFT_VECTOR2F   vector2f(-1.0f, 0.0f);
-#define RIGHT_VECTOR2F  vector2f(1.0f, 0.0f);
-#define UNIT_X_VECTOR2F vector2f(1.0f, 0.0f);
-#define UNIT_Y_VECTOR2F vector2f(0.0f, 1.0f);
+#define VEC2I_ZERO           vec2i(0, 0)
+#define VEC2I_UP             vec2i(0, -1);
+#define VEC2I_DOWN           vec2i(0, 1);
+#define VEC2I_LEFT           vec2i(-1, 0);
+#define VEC2I_RIGHT          vec2i(1, 0);
+#define VEC2I_UNIT_X         vec2i(1, 0);
+#define VEC2I_UNIT_Y         vec2i(0, 1);
 
 
 typedef struct {
     fixed x;
     fixed y;
-} VECTOR2FP;
+} VEC2;
 
-static VECTOR2FP vector2fp(fixed x, fixed y);
-static void vector2fp_set(VECTOR2FP *v, fixed x, fixed y);
-static boolean vector2fp_equals(VECTOR2FP a, VECTOR2FP b);
-static VECTOR2FP vector2fp_add(VECTOR2FP a, VECTOR2FP b);
-static VECTOR2FP vector2fp_sub(VECTOR2FP a, VECTOR2FP b);
-static VECTOR2FP vector2fp_mul(VECTOR2FP a, VECTOR2FP b);
-static VECTOR2FP vector2fp_muls(VECTOR2FP v, fixed n);
-static VECTOR2FP vector2fp_div(VECTOR2FP a, VECTOR2FP b);
-static VECTOR2FP vector2fp_divs(VECTOR2FP v, fixed n);
-static fixed vector2fp_distance(VECTOR2FP a, VECTOR2FP b);
-static fixed vector2fp_distancesq(VECTOR2FP a, VECTOR2FP b);
-static fixed vector2fp_dot(VECTOR2FP a, VECTOR2FP b);
-static fixed vector2fp_length(VECTOR2FP v);
-static fixed vector2fp_lengthsq(VECTOR2FP v);
-static VECTOR2FP vector2fp_normalize(VECTOR2FP v);
-static VECTOR2FP vector2fp_set_length(VECTOR2FP v, fixed length);
-static VECTOR2FP vector2fp_lerp(VECTOR2FP a, VECTOR2FP b, fixed lerp);
+static VEC2 vec2(fixed x, fixed y);
+static void vec2_set(VEC2 *v, fixed x, fixed y);
+static bool vec2_equals(VEC2 a, VEC2 b);
+static VEC2 vec2_add(VEC2 a, VEC2 b);
+static VEC2 vec2_sub(VEC2 a, VEC2 b);
+static VEC2 vec2_mul(VEC2 a, VEC2 b);
+static VEC2 vec2_muls(VEC2 v, fixed n);
+static VEC2 vec2_div(VEC2 a, VEC2 b);
+static VEC2 vec2_divs(VEC2 v, fixed n);
+static fixed vec2_distance(VEC2 a, VEC2 b);
+static fixed vec2_distancesq(VEC2 a, VEC2 b);
+static fixed vec2_dot(VEC2 a, VEC2 b);
+static fixed vec2_length(VEC2 v);
+static fixed vec2_lengthsq(VEC2 v);
+static VEC2 vec2_normalize(VEC2 v);
+static VEC2 vec2_set_length(VEC2 v, fixed length);
+static VEC2 vec2_lerp(VEC2 a, VEC2 b, fixed lerp);
 
-#define ZERO_VECTOR2FP   vector2fp(0, 0)
-#define UP_VECTOR2FP     vector2fp(0, (-1 << 16));
-#define DOWN_VECTOR2FP   vector2fp(0, (1 << 16));
-#define LEFT_VECTOR2FP   vector2fp((-1 << 16), 0);
-#define RIGHT_VECTOR2FP  vector2fp((1 << 16), 0);
-#define UNIT_X_VECTOR2FP vector2fp((1 << 16), 0);
-#define UNIT_Y_VECTOR2FP vector2fp(0, (1 << 16));
+#define VEC2_ZERO            vec2(0, 0)
+#define VEC2_UP              vec2(0, ITOFIX(-1));
+#define VEC2_DOWN            vec2(0, ITOFIX(1));
+#define VEC2_LEFT            vec2(ITOFIX(-1), 0);
+#define VEC2_RIGHT           vec2(ITOFIX(1), 0);
+#define VEC2_UNIT_X          vec2(ITOFIX(1), 0);
+#define VEC2_UNIT_Y          vec2(0, ITOFIX(1));
 
 // --------------------------------------------------------------------------
 
-static VECTOR2I vector2i(int x, int y) {
-    VECTOR2I v;
+static VEC2I vec2i(int x, int y) {
+    VEC2I v;
     v.x = x;
     v.y = y;
     return v;
 }
 
-static VECTOR2F vector2f(float x, float y) {
-    VECTOR2F v;
+static VEC2 vec2(fixed x, fixed y) {
+    VEC2 v;
     v.x = x;
     v.y = y;
     return v;
 }
 
-static VECTOR2FP vector2fp(fixed x, fixed y) {
-    VECTOR2FP v;
-    v.x = x;
-    v.y = y;
-    return v;
-}
-
-static void vector2i_set(VECTOR2I *v, int x, int y) {
+static void vec2i_set(VEC2I *v, int x, int y) {
     v->x = x;
     v->y = y;
 }
 
-static void vector2f_set(VECTOR2F *v, float x, float y) {
+static void vec2_set(VEC2 *v, fixed x, fixed y) {
     v->x = x;
     v->y = y;
 }
 
-static void vector2fp_set(VECTOR2FP *v, fixed x, fixed y) {
-    v->x = x;
-    v->y = y;
-}
-
-static boolean vector2i_equals(VECTOR2I a, VECTOR2I b) {
+static bool vec2i_equals(VEC2I a, VEC2I b) {
     return (a.x == b.x && a.y == b.y);
 }
 
-static boolean vector2f_equals(VECTOR2F a, VECTOR2F b) {
+static bool vec2_equals(VEC2 a, VEC2 b) {
     return (a.x == b.x && a.y == b.y);
 }
 
-static boolean vector2fp_equals(VECTOR2FP a, VECTOR2FP b) {
-    return (a.x == b.x && a.y == b.y);
-}
-
-static VECTOR2I vector2i_add(VECTOR2I a, VECTOR2I b) {
-    VECTOR2I result;
+static VEC2I vec2i_add(VEC2I a, VEC2I b) {
+    VEC2I result;
     result.x = a.x + b.x;
     result.y = a.y + b.y;
     return result;
 }
 
-static VECTOR2F vector2f_add(VECTOR2F a, VECTOR2F b) {
-    VECTOR2F result;
+static VEC2 vec2_add(VEC2 a, VEC2 b) {
+    VEC2 result;
     result.x = a.x + b.x;
     result.y = a.y + b.y;
     return result;
 }
 
-static VECTOR2FP vector2fp_add(VECTOR2FP a, VECTOR2FP b) {
-    VECTOR2FP result;
-    result.x = a.x + b.x;
-    result.y = a.y + b.y;
-    return result;
-}
-
-static VECTOR2I vector2i_sub(VECTOR2I a, VECTOR2I b) {
-    VECTOR2I result;
+static VEC2I vec2i_sub(VEC2I a, VEC2I b) {
+    VEC2I result;
     result.x = a.x - b.x;
     result.y = a.y - b.y;
     return result;
 }
 
-static VECTOR2F vector2f_sub(VECTOR2F a, VECTOR2F b) {
-    VECTOR2F result;
+static VEC2 vec2_sub(VEC2 a, VEC2 b) {
+    VEC2 result;
     result.x = a.x - b.x;
     result.y = a.y - b.y;
     return result;
 }
 
-static VECTOR2FP vector2fp_sub(VECTOR2FP a, VECTOR2FP b) {
-    VECTOR2FP result;
-    result.x = a.x - b.x;
-    result.y = a.y - b.y;
-    return result;
-}
-
-static VECTOR2I vector2i_mul(VECTOR2I a, VECTOR2I b) {
-    VECTOR2I result;
+static VEC2I vec2i_mul(VEC2I a, VEC2I b) {
+    VEC2I result;
     result.x = a.x * b.x;
     result.y = a.y * b.y;
     return result;
 }
 
-static VECTOR2F vector2f_mul(VECTOR2F a, VECTOR2F b) {
-    VECTOR2F result;
-    result.x = a.x * b.x;
-    result.y = a.y * b.y;
-    return result;
-}
-
-static VECTOR2FP vector2fp_mul(VECTOR2FP a, VECTOR2FP b) {
-    VECTOR2FP result;
+static VEC2 vec2_mul(VEC2 a, VEC2 b) {
+    VEC2 result;
     result.x = fix_mul(a.x, b.x);
     result.y = fix_mul(a.y, b.y);
     return result;
 }
 
-static VECTOR2I vector2i_muls(VECTOR2I v, int n) {
-    VECTOR2I result;
+static VEC2I vec2i_muls(VEC2I v, int n) {
+    VEC2I result;
     result.x = v.x * n;
     result.y = v.y * n;
     return result;
 }
 
-static VECTOR2F vector2f_muls(VECTOR2F v, float n) {
-    VECTOR2F result;
-    result.x = v.x * n;
-    result.y = v.y * n;
-    return result;
-}
-
-static VECTOR2FP vector2fp_muls(VECTOR2FP v, fixed n) {
-    VECTOR2FP result;
+static VEC2 vec2_muls(VEC2 v, fixed n) {
+    VEC2 result;
     result.x = fix_mul(v.x, n);
     result.y = fix_mul(v.y, n);
     return result;
 }
 
-static VECTOR2I vector2i_div(VECTOR2I a, VECTOR2I b) {
-    VECTOR2I result;
+static VEC2I vec2i_div(VEC2I a, VEC2I b) {
+    VEC2I result;
     result.x = a.x / b.x;
     result.y = a.y / b.y;
     return result;
 }
 
-static VECTOR2F vector2f_div(VECTOR2F a, VECTOR2F b) {
-    VECTOR2F result;
-    result.x = a.x / b.x;
-    result.y = a.y / b.y;
-    return result;
-}
-
-static VECTOR2FP vector2fp_div(VECTOR2FP a, VECTOR2FP b) {
-    VECTOR2FP result;
+static VEC2 vec2_div(VEC2 a, VEC2 b) {
+    VEC2 result;
     result.x = fix_div(a.x, b.x);
     result.y = fix_div(a.y, b.y);
     return result;
 }
 
-static VECTOR2I vector2i_divs(VECTOR2I v, int n) {
-    VECTOR2I result;
+static VEC2I vec2i_divs(VEC2I v, int n) {
+    VEC2I result;
     result.x = v.x / n;
     result.y = v.y / n;
     return result;
 }
 
-static VECTOR2F vector2f_divs(VECTOR2F v, float n) {
-    VECTOR2F result;
-    result.x = v.x / n;
-    result.y = v.y / n;
-    return result;
-}
-
-static VECTOR2FP vector2fp_divs(VECTOR2FP v, fixed n) {
-    VECTOR2FP result;
+static VEC2 vec2_divs(VEC2 v, fixed n) {
+    VEC2 result;
     result.x = fix_div(v.x, n);
     result.y = fix_div(v.y, n);
     return result;
 }
 
-static int vector2i_distance(VECTOR2I a, VECTOR2I b) {
+static int vec2i_distance(VEC2I a, VEC2I b) {
     return (int)sqrt(
         ((b.x - a.x) * (b.x - a.x)) +
         ((b.y - a.y) * (b.y - a.y))
         );
 }
 
-static float vector2f_distance(VECTOR2F a, VECTOR2F b) {
-    return (float)sqrt(
-        ((b.x - a.x) * (b.x - a.x)) +
-        ((b.y - a.y) * (b.y - a.y))
-        );
-}
-
-static fixed vector2fp_distance(VECTOR2FP a, VECTOR2FP b) {
+static fixed vec2_distance(VEC2 a, VEC2 b) {
     return fix_sqrt(
         fix_mul((b.x - a.x), (b.x - a.x)) +
         fix_mul((b.y - a.y), (b.y - a.y))
         );
 }
 
-static int vector2i_distancesq(VECTOR2I a, VECTOR2I b) {
+static int vec2i_distancesq(VEC2I a, VEC2I b) {
     return
         ((b.x - a.x) * (b.x - a.x)) +
         ((b.y - a.y) * (b.y - a.y));
 }
 
-static float vector2f_distancesq(VECTOR2F a, VECTOR2F b) {
-    return
-        ((b.x - a.x) * (b.x - a.x)) +
-        ((b.y - a.y) * (b.y - a.y));
-}
-
-static fixed vector2fp_distancesq(VECTOR2FP a, VECTOR2FP b) {
+static fixed vec2_distancesq(VEC2 a, VEC2 b) {
     return
         fix_mul((b.x - a.x), (b.x - a.x)) +
         fix_mul((b.y - a.y), (b.y - a.y));
 }
 
-static int vector2i_dot(VECTOR2I a, VECTOR2I b) {
+static int vec2i_dot(VEC2I a, VEC2I b) {
     return
         (a.x * b.x) +
         (a.y * b.y);
 }
 
-static float vector2f_dot(VECTOR2F a, VECTOR2F b) {
-    return
-        (a.x * b.x) +
-        (a.y * b.y);
-}
-
-static fixed vector2fp_dot(VECTOR2FP a, VECTOR2FP b) {
+static fixed vec2_dot(VEC2 a, VEC2 b) {
     return
         fix_mul(a.x, b.x) +
         fix_mul(a.y, b.y);
 }
 
-static int vector2i_length(VECTOR2I v) {
+static int vec2i_length(VEC2I v) {
     return sqrt(
         (v.x * v.x) +
         (v.y * v.y)
         );
 }
 
-static float vector2f_length(VECTOR2F v) {
-    return (float)sqrt(
-        (v.x * v.x) +
-        (v.y * v.y)
-        );
-}
-
-static fixed vector2fp_length(VECTOR2FP v) {
+static fixed vec2_length(VEC2 v) {
     return fix_sqrt(
         fix_mul(v.x, v.x) +
         fix_mul(v.y, v.y)
         );
 }
 
-static int vector2i_lengthsq(VECTOR2I v) {
+static int vec2i_lengthsq(VEC2I v) {
     return
         (v.x * v.x) +
         (v.y * v.y);
 }
 
-static float vector2f_lengthsq(VECTOR2F v) {
-    return
-        (v.x * v.x) +
-        (v.y * v.y);
-}
-
-static fixed vector2fp_lengthsq(VECTOR2FP v) {
+static fixed vec2_lengthsq(VEC2 v) {
     return
         fix_mul(v.x, v.x) +
         fix_mul(v.y, v.y);
 }
 
-static VECTOR2F vector2f_normalize(VECTOR2F v) {
-    float inverse_length;
-    VECTOR2F result;
-
-    inverse_length = 1.0f / vector2f_length(v);
-    result.x = v.x * inverse_length;
-    result.y = v.y * inverse_length;
-    return result;
-}
-
-static VECTOR2FP vector2fp_normalize(VECTOR2FP v) {
+static VEC2 vec2_normalize(VEC2 v) {
     fixed inverse_length;
-    VECTOR2FP result;
+    VEC2 result;
 
-    inverse_length = fix_div(FP_1, vector2fp_length(v));
+    inverse_length = fix_div(FP_1, vec2_length(v));
     result.x = fix_mul(v.x, inverse_length);
     result.y = fix_mul(v.y, inverse_length);
     return result;
 }
 
-static VECTOR2F vector2f_set_length(VECTOR2F v, float length) {
-    float scale_factor;
-    VECTOR2F result;
-
-    scale_factor = length / vector2f_length(v);
-    result.x = v.x * scale_factor;
-    result.y = v.y * scale_factor;
-    return result;
-}
-
-static VECTOR2FP vector2fp_set_length(VECTOR2FP v, fixed length) {
+static VEC2 vec2_set_length(VEC2 v, fixed length) {
     fixed scale_factor;
-    VECTOR2FP result;
+    VEC2 result;
 
-    scale_factor = fix_div(length, vector2fp_length(v));
+    scale_factor = fix_div(length, vec2_length(v));
     result.x = fix_mul(v.x, scale_factor);
     result.y = fix_mul(v.y, scale_factor);
     return result;
 }
 
-static VECTOR2I vector2i_lerp(VECTOR2I a, VECTOR2I b, float lerp) {
-    VECTOR2I result;
+static VEC2I vec2i_lerp(VEC2I a, VEC2I b, float lerp) {
+    VEC2I result;
     result.x = a.x + (b.x - a.x) * lerp;
     result.y = a.y + (b.y - a.y) * lerp;
     return result;
 }
 
-static VECTOR2F vector2f_lerp(VECTOR2F a, VECTOR2F b, float lerp) {
-    VECTOR2F result;
-    result.x = a.x + (b.x - a.x) * lerp;
-    result.y = a.y + (b.y - a.y) * lerp;
-    return result;
-}
-
-static VECTOR2FP vector2fp_lerp(VECTOR2FP a, VECTOR2FP b, fixed lerp) {
-    VECTOR2FP result;
+static VEC2 vec2_lerp(VEC2 a, VEC2 b, fixed lerp) {
+    VEC2 result;
     result.x = a.x + fix_mul((b.x - a.x), lerp);
     result.y = a.y + fix_mul((b.y - a.y), lerp);
     return result;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 

TEST/BLIT.C

@@ -1,9 +1,10 @@
 #include "blit.h"
-#include "dgl.h"
+#include "dglblit.h"
+#include "dgldraw.h"
 #include <stdio.h>
 #include "helpers.h"
 
-SURFACE* get_sprite(int width, int height) {
+SURFACE* create_sprite(int width, int height) {
     int x_third, y_third;
     SURFACE *sprite = surface_create(width, height);
     ASSERT(sprite != NULL);
@@ -13,28 +14,28 @@ SURFACE* get_sprite(int width, int height) {
     x_third = width / 3;
     y_third = height / 3;
 
-    surface_filled_rect(sprite, 0, 0, x_third, y_third, 1);
-    surface_filled_rect(sprite, x_third * 2, y_third * 2, width - 1, height - 1, 2);
-    surface_filled_rect(sprite, 0, (y_third * 2), x_third, height - 1, 3);
-    surface_filled_rect(sprite, x_third * 2, 0, width - 1, y_third, 4);
-    surface_filled_rect(sprite, x_third, y_third, x_third * 2, y_third * 2, 5);
-    surface_rect(sprite, 0, 0, width - 1, height - 1, 6);
+    draw_filled_rect(sprite, 0, 0, x_third, y_third, 1);
+    draw_filled_rect(sprite, x_third * 2, y_third * 2, width - 1, height - 1, 2);
+    draw_filled_rect(sprite, 0, (y_third * 2), x_third, height - 1, 3);
+    draw_filled_rect(sprite, x_third * 2, 0, width - 1, y_third, 4);
+    draw_filled_rect(sprite, x_third, y_third, x_third * 2, y_third * 2, 5);
+    draw_rect(sprite, 0, 0, width - 1, height - 1, 6);
 
     return sprite;
 }
 
-SURFACE* get_image(int width, int height) {
+SURFACE* create_image(int width, int height) {
     int x, y;
     SURFACE *image = surface_create(width, height);
     ASSERT(image != NULL);
     ASSERT(image->width == width);
     ASSERT(image->height == height);
 
-    surface_filled_rect(image, 0, 0, width / 2, height / 2, 1);
-    surface_filled_rect(image, width / 2, 0, width - 1, height / 2, 2);
-    surface_filled_rect(image, 0, height / 2, width / 2, height - 1, 3);
-    surface_filled_rect(image, width / 2, height / 2, width - 1, height - 1, 4);
-    surface_rect(image, 0, 0, width - 1, height - 1, 5);
+    draw_filled_rect(image, 0, 0, width / 2, height / 2, 1);
+    draw_filled_rect(image, width / 2, 0, width - 1, height / 2, 2);
+    draw_filled_rect(image, 0, height / 2, width / 2, height - 1, 3);
+    draw_filled_rect(image, width / 2, height / 2, width - 1, height - 1, 4);
+    draw_rect(image, 0, 0, width - 1, height - 1, 5);
 
     return image;
 }
@@ -47,32 +48,32 @@ SURFACE* get_image(int width, int height) {
 void test_blit(void) {
     int x, y;
 
-    SURFACE *bmp16 = get_image(16, 16);
-    SURFACE *bmp12 = get_image(12, 12);
-    SURFACE *bmp21 = get_image(21, 21);
-    SURFACE *bmp3 = get_image(3, 3);
+    SURFACE *bmp16 = create_image(16, 16);
+    SURFACE *bmp12 = create_image(12, 12);
+    SURFACE *bmp21 = create_image(21, 21);
+    SURFACE *bmp3 = create_image(3, 3);
 
     surface_clear(screen, 0);
 
     x = 0; y = 0;
 
-    surface_blit_region(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
-    surface_blit_region(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
+    blit_region(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
+    blit_region(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
 
-    surface_blit(bmp16, screen, x + 16, y + 48);
-    surface_blit(bmp12, screen, x + 48, y + 48);
-    surface_blit(bmp21, screen, x + 80, y + 48);
-    surface_blit(bmp3, screen, x + 112, y + 48);
+    blit(bmp16, screen, x + 16, y + 48);
+    blit(bmp12, screen, x + 48, y + 48);
+    blit(bmp21, screen, x + 80, y + 48);
+    blit(bmp3, screen, x + 112, y + 48);
 
     x = 160; y = 0;
 
-    surface_blit_region_f(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
-    surface_blit_region_f(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
+    blit_region_f(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
+    blit_region_f(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
 
-    surface_blit_f(bmp16, screen, x + 16, y + 48);
-    surface_blit_f(bmp12, screen, x + 48, y + 48);
-    surface_blit_f(bmp21, screen, x + 80, y + 48);
-    surface_blit_f(bmp3, screen, x + 112, y + 48);
+    blit_f(bmp16, screen, x + 16, y + 48);
+    blit_f(bmp12, screen, x + 48, y + 48);
+    blit_f(bmp21, screen, x + 80, y + 48);
+    blit_f(bmp3, screen, x + 112, y + 48);
 
     surface_free(bmp16);
     surface_free(bmp12);
@@ -85,41 +86,41 @@ void test_blit(void) {
 // varying amounts. the 7th blit on each edge is completely out of bounds and
 // should not be visible at all.
 void test_blit_clipping(void) {
-    SURFACE *bmp = get_image(16, 16);
+    SURFACE *bmp = create_image(16, 16);
 
     surface_clear(screen, 0);
 
-    surface_blit(bmp, screen, -3, 16);
-    surface_blit(bmp, screen, -4, 36);
-    surface_blit(bmp, screen, -8, 56);
-    surface_blit(bmp, screen, -12, 76);
-    surface_blit(bmp, screen, -13, 96);
-    surface_blit(bmp, screen, -14, 116);
-    surface_blit(bmp, screen, -16, 136);
+    blit(bmp, screen, -3, 16);
+    blit(bmp, screen, -4, 36);
+    blit(bmp, screen, -8, 56);
+    blit(bmp, screen, -12, 76);
+    blit(bmp, screen, -13, 96);
+    blit(bmp, screen, -14, 116);
+    blit(bmp, screen, -16, 136);
 
-    surface_blit(bmp, screen, 16, -3);
-    surface_blit(bmp, screen, 36, -4);
-    surface_blit(bmp, screen, 56, -8);
-    surface_blit(bmp, screen, 76, -12);
-    surface_blit(bmp, screen, 96, -13);
-    surface_blit(bmp, screen, 116, -14);
-    surface_blit(bmp, screen, 136, -16);
+    blit(bmp, screen, 16, -3);
+    blit(bmp, screen, 36, -4);
+    blit(bmp, screen, 56, -8);
+    blit(bmp, screen, 76, -12);
+    blit(bmp, screen, 96, -13);
+    blit(bmp, screen, 116, -14);
+    blit(bmp, screen, 136, -16);
 
-    surface_blit(bmp, screen, 307, 16);
-    surface_blit(bmp, screen, 308, 36);
-    surface_blit(bmp, screen, 312, 56);
-    surface_blit(bmp, screen, 316, 76);
-    surface_blit(bmp, screen, 317, 96);
-    surface_blit(bmp, screen, 318, 116);
-    surface_blit(bmp, screen, 320, 136);
+    blit(bmp, screen, 307, 16);
+    blit(bmp, screen, 308, 36);
+    blit(bmp, screen, 312, 56);
+    blit(bmp, screen, 316, 76);
+    blit(bmp, screen, 317, 96);
+    blit(bmp, screen, 318, 116);
+    blit(bmp, screen, 320, 136);
 
-    surface_blit(bmp, screen, 16, 187);
-    surface_blit(bmp, screen, 36, 188);
-    surface_blit(bmp, screen, 56, 192);
-    surface_blit(bmp, screen, 76, 196);
-    surface_blit(bmp, screen, 96, 197);
-    surface_blit(bmp, screen, 116, 198);
-    surface_blit(bmp, screen, 136, 200);
+    blit(bmp, screen, 16, 187);
+    blit(bmp, screen, 36, 188);
+    blit(bmp, screen, 56, 192);
+    blit(bmp, screen, 76, 196);
+    blit(bmp, screen, 96, 197);
+    blit(bmp, screen, 116, 198);
+    blit(bmp, screen, 136, 200);
 
     surface_free(bmp);
     getch();
@@ -130,32 +131,32 @@ void test_blit_clipping(void) {
 // black as that colour is not used anywhere in the test sprite.
 void test_sprite(void) {
     int x, y;
-    SURFACE *bmp16 = get_sprite(16, 16);
-    SURFACE *bmp12 = get_sprite(12, 12);
-    SURFACE *bmp21 = get_sprite(21, 21);
-    SURFACE *bmp3 = get_sprite(3, 3);
+    SURFACE *bmp16 = create_sprite(16, 16);
+    SURFACE *bmp12 = create_sprite(12, 12);
+    SURFACE *bmp21 = create_sprite(21, 21);
+    SURFACE *bmp3 = create_sprite(3, 3);
 
     surface_clear(screen, 8);
 
     x = 0; y = 0;
 
-    surface_blit_sprite_region(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
-    surface_blit_sprite_region(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
+    blit_sprite_region(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
+    blit_sprite_region(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
 
-    surface_blit_sprite(bmp16, screen, x + 16, y + 48);
-    surface_blit_sprite(bmp12, screen, x + 48, y + 48);
-    surface_blit_sprite(bmp21, screen, x + 80, y + 48);
-    surface_blit_sprite(bmp3, screen, x + 112, y + 48);
+    blit_sprite(bmp16, screen, x + 16, y + 48);
+    blit_sprite(bmp12, screen, x + 48, y + 48);
+    blit_sprite(bmp21, screen, x + 80, y + 48);
+    blit_sprite(bmp3, screen, x + 112, y + 48);
 
     x = 160; y = 0;
 
-    surface_blit_sprite_region_f(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
-    surface_blit_sprite_region_f(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
+    blit_sprite_region_f(bmp16, screen, 0, 0, 16, 16, x + 16, y + 16);
+    blit_sprite_region_f(bmp16, screen, 8, 8, 8, 8, x + 48, y + 16);
 
-    surface_blit_sprite_f(bmp16, screen, x + 16, y + 48);
-    surface_blit_sprite_f(bmp12, screen, x + 48, y + 48);
-    surface_blit_sprite_f(bmp21, screen, x + 80, y + 48);
-    surface_blit_sprite_f(bmp3, screen, x + 112, y + 48);
+    blit_sprite_f(bmp16, screen, x + 16, y + 48);
+    blit_sprite_f(bmp12, screen, x + 48, y + 48);
+    blit_sprite_f(bmp21, screen, x + 80, y + 48);
+    blit_sprite_f(bmp3, screen, x + 112, y + 48);
 
     surface_free(bmp16);
     surface_free(bmp12);
@@ -168,41 +169,41 @@ void test_sprite(void) {
 // blitting instead and uses a grey background. no part of the screen buffer
 // should be black as that colour is not used anywhere in the test sprite.
 void test_sprite_clipping(void) {
-    SURFACE *bmp = get_sprite(16, 16);
+    SURFACE *bmp = create_sprite(16, 16);
 
     surface_clear(screen, 8);
 
-    surface_blit_sprite(bmp, screen, -3, 16);
-    surface_blit_sprite(bmp, screen, -4, 36);
-    surface_blit_sprite(bmp, screen, -8, 56);
-    surface_blit_sprite(bmp, screen, -12, 76);
-    surface_blit_sprite(bmp, screen, -13, 96);
-    surface_blit_sprite(bmp, screen, -14, 116);
-    surface_blit_sprite(bmp, screen, -16, 136);
+    blit_sprite(bmp, screen, -3, 16);
+    blit_sprite(bmp, screen, -4, 36);
+    blit_sprite(bmp, screen, -8, 56);
+    blit_sprite(bmp, screen, -12, 76);
+    blit_sprite(bmp, screen, -13, 96);
+    blit_sprite(bmp, screen, -14, 116);
+    blit_sprite(bmp, screen, -16, 136);
 
-    surface_blit_sprite(bmp, screen, 16, -3);
-    surface_blit_sprite(bmp, screen, 36, -4);
-    surface_blit_sprite(bmp, screen, 56, -8);
-    surface_blit_sprite(bmp, screen, 76, -12);
-    surface_blit_sprite(bmp, screen, 96, -13);
-    surface_blit_sprite(bmp, screen, 116, -14);
-    surface_blit_sprite(bmp, screen, 136, -16);
+    blit_sprite(bmp, screen, 16, -3);
+    blit_sprite(bmp, screen, 36, -4);
+    blit_sprite(bmp, screen, 56, -8);
+    blit_sprite(bmp, screen, 76, -12);
+    blit_sprite(bmp, screen, 96, -13);
+    blit_sprite(bmp, screen, 116, -14);
+    blit_sprite(bmp, screen, 136, -16);
 
-    surface_blit_sprite(bmp, screen, 307, 16);
-    surface_blit_sprite(bmp, screen, 308, 36);
-    surface_blit_sprite(bmp, screen, 312, 56);
-    surface_blit_sprite(bmp, screen, 316, 76);
-    surface_blit_sprite(bmp, screen, 317, 96);
-    surface_blit_sprite(bmp, screen, 318, 116);
-    surface_blit_sprite(bmp, screen, 320, 136);
+    blit_sprite(bmp, screen, 307, 16);
+    blit_sprite(bmp, screen, 308, 36);
+    blit_sprite(bmp, screen, 312, 56);
+    blit_sprite(bmp, screen, 316, 76);
+    blit_sprite(bmp, screen, 317, 96);
+    blit_sprite(bmp, screen, 318, 116);
+    blit_sprite(bmp, screen, 320, 136);
 
-    surface_blit_sprite(bmp, screen, 16, 187);
-    surface_blit_sprite(bmp, screen, 36, 188);
-    surface_blit_sprite(bmp, screen, 56, 192);
-    surface_blit_sprite(bmp, screen, 76, 196);
-    surface_blit_sprite(bmp, screen, 96, 197);
-    surface_blit_sprite(bmp, screen, 116, 198);
-    surface_blit_sprite(bmp, screen, 136, 200);
+    blit_sprite(bmp, screen, 16, 187);
+    blit_sprite(bmp, screen, 36, 188);
+    blit_sprite(bmp, screen, 56, 192);
+    blit_sprite(bmp, screen, 76, 196);
+    blit_sprite(bmp, screen, 96, 197);
+    blit_sprite(bmp, screen, 116, 198);
+    blit_sprite(bmp, screen, 136, 200);
 
     surface_free(bmp);
     getch();

TEST/EVENTS.C

@@ -1,10 +1,12 @@
 #include "events.h"
-#include "dgl.h"
+#include "dglkbrd.h"
+#include "dglmouse.h"
+#include "dglevent.h"
 #include <stdio.h>
 #include "helpers.h"
 
 void test_events(void) {
-    boolean result;
+    bool result;
     INPUTEVENT *event;
     char ch;
 
@@ -12,15 +14,15 @@ void test_events(void) {
     delay(500);
 
     result = keyboard_init();
-    ASSERT(result == TRUE);
+    ASSERT(result == true);
     result = mouse_init();
-    ASSERT(result == TRUE);
+    ASSERT(result == true);
 
-    ASSERT(events_is_initialized() == FALSE);
+    ASSERT(events_is_initialized() == false);
 
     result = events_init();
-    ASSERT(result == TRUE);
-    ASSERT(events_is_initialized() == TRUE);
+    ASSERT(result == true);
+    ASSERT(events_is_initialized() == true);
 
     printf("Displaying events:\n\n");
 
@@ -63,13 +65,13 @@ void test_events(void) {
     }
 
     result = events_shutdown();
-    ASSERT(result == TRUE);
-    ASSERT(events_is_initialized() == FALSE);
+    ASSERT(result == true);
+    ASSERT(events_is_initialized() == false);
 
     result = mouse_shutdown();
-    ASSERT(result == TRUE);
+    ASSERT(result == true);
     result = keyboard_shutdown();
-    ASSERT(result == TRUE);
+    ASSERT(result == true);
 
     printf("\nPress a key to continue...\n");
 

TEST/EVENTS.H

@@ -1,5 +1,7 @@
 #ifndef DGL_TEST_EVENTS_H_INCLUDED
 #define DGL_TEST_EVENTS_H_INCLUDED
 
+void test_events(void);
+
 #endif
 

TEST/FIXED.C

@@ -1,5 +1,6 @@
 #include "fixed.h"
-#include "dgl.h"
+#include "dglfixp.h"
+#include "dglmath.h"
 #include <stdio.h>
 #include "helpers.h"
 

TEST/HELPERS.C

@@ -1,5 +1,4 @@
 #include "helpers.h"
-#include "dgl.h"
 #include <conio.h>
 #include <dos.h>
 #include <stdio.h>

TEST/HELPERS.H

@@ -3,7 +3,7 @@
 
 #include <stdio.h>
 #include <assert.h>
-#include "dgl.h"
+#include "dglmath.h"
 
 #define F_EQU(a, b) (close_enough((a), (b), TOLERANCE))
 #define FFIX_EQU(a, b) (close_enough((a), (b), 0.05f))  // wow !

TEST/KBRD.C

@@ -1,5 +1,5 @@
 #include "kbrd.h"
-#include "dgl.h"
+#include "dglkbrd.h"
 #include <dos.h>
 #include <stdio.h>
 #include "helpers.h"
@@ -19,16 +19,16 @@ void display_key_states(void) {
 }
 
 void test_keyboard(void) {
-    boolean result;
+    bool result;
     KEY k;
 
     clrscr(0);
 
-    ASSERT(keyboard_is_initialized() == FALSE);
+    ASSERT(keyboard_is_initialized() == false);
 
     result = keyboard_init();
-    ASSERT(result == TRUE);
-    ASSERT(keyboard_is_initialized() == TRUE);
+    ASSERT(result == true);
+    ASSERT(keyboard_is_initialized() == true);
 
     printf("Keyboard state\n");
     display_key_states();
@@ -52,8 +52,8 @@ void test_keyboard(void) {
     keyboard_wait_for_key(k);
 
     result = keyboard_shutdown();
-    ASSERT(result == TRUE);
-    ASSERT(keyboard_is_initialized() == FALSE);
+    ASSERT(result == true);
+    ASSERT(keyboard_is_initialized() == false);
 
     gotoxy(0, 23);
     printf("Press a key to continue...\n");

TEST/LINE.C

@@ -1,5 +1,6 @@
 #include "line.h"
-#include "dgl.h"
+#include "dgldraw.h"
+#include "dglmath.h"
 #include <stdio.h>
 
 // draws two horizontal lines, with red pixels marking the extents of the
@@ -11,21 +12,21 @@ void test_hline(void) {
 
     x1 = 10; x2 = 100; y = 20;
 
-    surface_pset(screen, x1 - 1, y, 4);
-    surface_pset(screen, x2 + 1, y, 4);
-    surface_hline(screen, x1, x2, y, 1);
+    pset(screen, x1 - 1, y, 4);
+    pset(screen, x2 + 1, y, 4);
+    draw_hline(screen, x1, x2, y, 1);
 
     y = 30;
 
-    surface_pset(screen, x1 - 1, y, 4);
-    surface_pset(screen, x2 + 1, y, 4);
-    surface_hline(screen, x2, x1, y, 2);
+    pset(screen, x1 - 1, y, 4);
+    pset(screen, x2 + 1, y, 4);
+    draw_hline(screen, x2, x1, y, 2);
 
     x1 = 200; x2 = 300; y = 20;
 
-    surface_pset(screen, x1 - 1, y, 4);
-    surface_pset(screen, x2 + 1, y, 4);
-    surface_hline_f(screen, x1, x2, y, 1);
+    pset(screen, x1 - 1, y, 4);
+    pset(screen, x2 + 1, y, 4);
+    draw_hline_f(screen, x1, x2, y, 1);
 
     getch();
 }
@@ -40,15 +41,15 @@ void test_hline_clipping(void) {
     surface_clear(screen, 0);
 
     x1 = -50; x2 = 50; y = 6;
-    surface_pset(screen, x2 + 1, y, 4);
-    surface_hline(screen, x1, x2, y, 1);
+    pset(screen, x2 + 1, y, 4);
+    draw_hline(screen, x1, x2, y, 1);
 
     x1 = 300; x2 = 340; y = 130;
-    surface_pset(screen, x1 - 1, y, 4);
-    surface_hline(screen, x1, x2, y, 2);
+    pset(screen, x1 - 1, y, 4);
+    draw_hline(screen, x1, x2, y, 2);
 
-    surface_hline(screen, 100, 200, -10, 3);
-    surface_hline(screen, 20, 80, 250, 5);
+    draw_hline(screen, 100, 200, -10, 3);
+    draw_hline(screen, 20, 80, 250, 5);
 
     getch();
 }
@@ -62,21 +63,21 @@ void test_vline(void) {
 
     x = 50; y1 = 10; y2 = 100;
 
-    surface_pset(screen, x, y1 - 1, 4);
-    surface_pset(screen, x, y2 + 1, 4);
-    surface_vline(screen, x, y1, y2, 1);
+    pset(screen, x, y1 - 1, 4);
+    pset(screen, x, y2 + 1, 4);
+    draw_vline(screen, x, y1, y2, 1);
 
     x = 60;
 
-    surface_pset(screen, x, y1 - 1, 4);
-    surface_pset(screen, x, y2 + 1, 4);
-    surface_vline(screen, x, y2, y1, 2);
+    pset(screen, x, y1 - 1, 4);
+    pset(screen, x, y2 + 1, 4);
+    draw_vline(screen, x, y2, y1, 2);
 
     x = 150; y1 = 10; y2 = 100;
 
-    surface_pset(screen, x, y1 - 1, 4);
-    surface_pset(screen, x, y2 + 1, 4);
-    surface_vline_f(screen, x, y1, y2, 1);
+    pset(screen, x, y1 - 1, 4);
+    pset(screen, x, y2 + 1, 4);
+    draw_vline_f(screen, x, y1, y2, 1);
 
     getch();
 }
@@ -91,15 +92,15 @@ void test_vline_clipping(void) {
     surface_clear(screen, 0);
 
     x = 20; y1 = -32; y2 = 32;
-    surface_pset(screen, x, y2 + 1, 4);
-    surface_vline(screen, x, y1, y2, 1);
+    pset(screen, x, y2 + 1, 4);
+    draw_vline(screen, x, y1, y2, 1);
 
     x = 270; y1 = 245; y2 = 165;
-    surface_pset(screen, x, y2 - 1, 4);
-    surface_vline(screen, x, y1, y2, 2);
+    pset(screen, x, y2 - 1, 4);
+    draw_vline(screen, x, y1, y2, 2);
 
-    surface_vline(screen, -17, 10, 20, 3);
-    surface_vline(screen, 400, 100, 300, 5);
+    draw_vline(screen, -17, 10, 20, 3);
+    draw_vline(screen, 400, 100, 300, 5);
 
     getch();
 }
@@ -114,70 +115,70 @@ void test_line(void) {
     surface_clear(screen, 0);
 
     x1 = 10; y1 = 10; x2 = 20; y2 = 20;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line(screen, x1, y1, x2, y2, 1);
 
     x1 = 10; y1 = 100; x2 = 20; y2 = 150;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line(screen, x1, y1, x2, y2, 2);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line(screen, x1, y1, x2, y2, 2);
 
     x1 = 60; y1 = 150; x2 = 50; y2 = 100;
-    surface_pset(screen, x1 + 1, y1, 4);
-    surface_pset(screen, x1, y1 + 1, 4);
-    surface_pset(screen, x2 - 1, y2, 4);
-    surface_pset(screen, x2, y2 - 1, 4);
-    surface_line(screen, x1, y1, x2, y2, 3);
+    pset(screen, x1 + 1, y1, 4);
+    pset(screen, x1, y1 + 1, 4);
+    pset(screen, x2 - 1, y2, 4);
+    pset(screen, x2, y2 - 1, 4);
+    draw_line(screen, x1, y1, x2, y2, 3);
 
     x1 = 50; y1 = 10; x2 = 100; y2 = 10;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_line(screen, x1, y1, x2, y2, 5);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    draw_line(screen, x1, y1, x2, y2, 5);
 
     x1 = 100; y1 = 50; x2 = 20; y2 = 50;
-    surface_pset(screen, x1 + 1, y1, 4);
-    surface_pset(screen, x2 - 1, y1, 4);
-    surface_line(screen, x1, y1, x2, y2, 6);
+    pset(screen, x1 + 1, y1, 4);
+    pset(screen, x2 - 1, y1, 4);
+    draw_line(screen, x1, y1, x2, y2, 6);
 
     x1 = 290; y1 = 10; x2 = 290; y2 = 100;
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line(screen, x1, y1, x2, y2, 7);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line(screen, x1, y1, x2, y2, 7);
 
     x1 = 310; y1 = 100; x2 = 310; y2 = 10;
-    surface_pset(screen, x1, y1 + 1, 4);
-    surface_pset(screen, x2, y2 - 1, 4);
-    surface_line(screen, x1, y1, x2, y2, 8);
+    pset(screen, x1, y1 + 1, 4);
+    pset(screen, x2, y2 - 1, 4);
+    draw_line(screen, x1, y1, x2, y2, 8);
 
 
     x1 = 30; y1 = 10; x2 = 40; y2 = 20;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line_f(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line_f(screen, x1, y1, x2, y2, 1);
 
     x1 = 30; y1 = 100; x2 = 40; y2 = 150;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line_f(screen, x1, y1, x2, y2, 2);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line_f(screen, x1, y1, x2, y2, 2);
 
     x1 = 50; y1 = 20; x2 = 100; y2 = 20;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_line_f(screen, x1, y1, x2, y2, 5);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    draw_line_f(screen, x1, y1, x2, y2, 5);
 
     x1 = 300; y1 = 10; x2 = 300; y2 = 100;
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_line_f(screen, x1, y1, x2, y2, 7);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_line_f(screen, x1, y1, x2, y2, 7);
 
     getch();
 }
@@ -193,14 +194,14 @@ void test_line_clipping(void) {
 
     surface_clear(screen, 0);
 
-    surface_line(screen, 10, -30, 100, -30, 1);
-    surface_line(screen, 70, 250, 170, 250, 2);
-    surface_line(screen, -100, 120, -100, 199, 3);
-    surface_line(screen, 320, 99, 320, 199, 5);
+    draw_line(screen, 10, -30, 100, -30, 1);
+    draw_line(screen, 70, 250, 170, 250, 2);
+    draw_line(screen, -100, 120, -100, 199, 3);
+    draw_line(screen, 320, 99, 320, 199, 5);
 
     for (angle = 0, color = 32; angle <= 360; angle += 10, ++color) {
         point_on_circle(400, DEG_TO_RAD(angle), &x, &y);
-        surface_line(screen, 160, 100, (int)x + 160, (int)y + 100, color);
+        draw_line(screen, 160, 100, (int)x + 160, (int)y + 100, color);
     }
 
     getch();

TEST/MOUSE.C

@@ -1,19 +1,19 @@
 #include "mouse.h"
-#include "dgl.h"
+#include "dglmouse.h"
 #include <dos.h>
 #include <stdio.h>
 #include "helpers.h"
 
 void test_mouse(void) {
-    boolean result;
+    bool result;
 
     clrscr(0);
 
-    ASSERT(mouse_is_initialized() == FALSE);
+    ASSERT(mouse_is_initialized() == false);
 
     result = mouse_init();
-    ASSERT(result == TRUE);
-    ASSERT(mouse_is_initialized() == TRUE);
+    ASSERT(result == true);
+    ASSERT(mouse_is_initialized() == true);
 
     // this may seem a little weird to check for a mouse AFTER init, but
     // it's the init call that determines if a mouse is present :)
@@ -37,8 +37,8 @@ void test_mouse(void) {
 
     // need to close down the mouse subsystem even if one is not present
     result = mouse_shutdown();
-    ASSERT(result == TRUE);
-    ASSERT(mouse_is_initialized() == FALSE);
+    ASSERT(result == true);
+    ASSERT(mouse_is_initialized() == false);
 
     gotoxy(0, 23);
     printf("Press a key to continue...\n");

TEST/PAL.C

@@ -1,5 +1,7 @@
 #include "pal.h"
-#include "dgl.h"
+#include "dglgfx.h"
+#include "dgldraw.h"
+#include "dglpal.h"
 #include <stdio.h>
 #include "helpers.h"
 
@@ -7,14 +9,14 @@
 // color 15's RGB values.
 void test_palette(void) {
     int i, x, y;
-    byte r, g, b;
+    uint8 r, g, b;
 
     surface_clear(screen, 0);
 
     i = 0;
     for (y = 0; y < 16; ++y) {
         for (x = 0; x < 16; ++x) {
-            surface_filled_rect(screen, x * 8, y * 8, x * 8 + 7, y * 8 + 7, i);
+            draw_filled_rect(screen, x * 8, y * 8, x * 8 + 7, y * 8 + 7, i);
             ++i;
         }
     }
@@ -31,13 +33,13 @@ void test_palette(void) {
 
 void test_palette_fading(void) {
     int i, x, y;
-    byte palette[768];
+    uint8 palette[768];
     surface_clear(screen, 0);
 
     i = 0;
     for (y = 0; y < 16; ++y) {
         for (x = 0; x < 16; ++x) {
-            surface_filled_rect(screen, x * 8, y * 8, x * 8 + 7, y * 8 + 7, i);
+            draw_filled_rect(screen, x * 8, y * 8, x * 8 + 7, y * 8 + 7, i);
             ++i;
         }
     }

TEST/PCX.C

@@ -1,13 +1,16 @@
 #include "pcx.h"
 #include "dgl.h"
+#include "dglgfx.h"
+#include "dglblit.h"
+#include "dglpcx.h"
 #include <stdio.h>
 #include "helpers.h"
 
 void test_pcx(void) {
     SURFACE *pcx;
     DGL_ERROR err;
-    byte pcx_palette[768];
-    byte original_palette[768];
+    uint8 pcx_palette[768];
+    uint8 original_palette[768];
 
     surface_clear(screen, 0);
     pal_get(original_palette);
@@ -20,7 +23,7 @@ void test_pcx(void) {
     pcx = pcx_load("test.pcx", NULL);
     ASSERT(pcx != NULL);
 
-    surface_blit(pcx, screen, 0, 0);
+    blit(pcx, screen, 0, 0);
     getch();
 
     surface_clear(screen, 0);
@@ -29,7 +32,7 @@ void test_pcx(void) {
     ASSERT(pcx != NULL);
 
     pal_set(pcx_palette);
-    surface_blit(pcx, screen, 0, 0);
+    blit(pcx, screen, 0, 0);
 
     getch();
     pal_set(original_palette);

TEST/PSET.C

@@ -1,5 +1,5 @@
 #include "pset.h"
-#include "dgl.h"
+#include "dgldraw.h"
 #include <stdio.h>
 #include "helpers.h"
 
@@ -8,7 +8,7 @@
 // starting at (10,10), draw 256 colour palette in a 16x16 pixel box.
 // draw white "guide" lines from (0,0) to (10,10)
 void test_pixels_1(void) {
-    byte *p;
+    uint8 *p;
     int i, x, y;
 
     surface_clear(screen, 0);
@@ -19,7 +19,7 @@ void test_pixels_1(void) {
     i = 0;
     for (y = 0; y < 16; ++y) {
         for (x = 0; x < 16; ++x) {
-            *p = (byte)i;
+            *p = (uint8)i;
             ++p;
             ++i;
         }
@@ -49,41 +49,41 @@ void test_pixels_1(void) {
 // draws two blue, green, cyan, red pixels each in each screen corner.
 // the second pixel colour is drawn by sampling the first.
 void test_pixels_2(void) {
-    byte c1, c2, c3, c4;
+    uint8 c1, c2, c3, c4;
 
     surface_clear(screen, 0);
 
-    surface_pset(screen, 0, 0, 1);
-    surface_pset(screen, 319, 0, 2);
-    surface_pset(screen, 0, 199, 3);
-    surface_pset(screen, 319, 199, 4);
+    pset(screen, 0, 0, 1);
+    pset(screen, 319, 0, 2);
+    pset(screen, 0, 199, 3);
+    pset(screen, 319, 199, 4);
 
-    surface_pset_f(screen, 10, 0, 1);
-    surface_pset_f(screen, 309, 0, 2);
-    surface_pset_f(screen, 10, 199, 3);
-    surface_pset_f(screen, 309, 199, 4);
+    pset_f(screen, 10, 0, 1);
+    pset_f(screen, 309, 0, 2);
+    pset_f(screen, 10, 199, 3);
+    pset_f(screen, 309, 199, 4);
 
-    c1 = surface_point(screen, 0, 0);
-    c2 = surface_point(screen, 319, 0);
-    c3 = surface_point(screen, 0, 199);
-    c4 = surface_point(screen, 319, 199);
+    c1 = pget(screen, 0, 0);
+    c2 = pget(screen, 319, 0);
+    c3 = pget(screen, 0, 199);
+    c4 = pget(screen, 319, 199);
     ASSERT(c1 == 1 && c2 == 2 && c3 == 3 && c4 == 4);
 
-    surface_pset(screen, 1, 1, c1);
-    surface_pset(screen, 318, 1, c2);
-    surface_pset(screen, 1, 198, c3);
-    surface_pset(screen, 318, 198, c4);
+    pset(screen, 1, 1, c1);
+    pset(screen, 318, 1, c2);
+    pset(screen, 1, 198, c3);
+    pset(screen, 318, 198, c4);
 
-    c1 = surface_point_f(screen, 10, 0);
-    c2 = surface_point_f(screen, 309, 0);
-    c3 = surface_point_f(screen, 10, 199);
-    c4 = surface_point_f(screen, 309, 199);
+    c1 = pget_f(screen, 10, 0);
+    c2 = pget_f(screen, 309, 0);
+    c3 = pget_f(screen, 10, 199);
+    c4 = pget_f(screen, 309, 199);
     ASSERT(c1 == 1 && c2 == 2 && c3 == 3 && c4 == 4);
 
-    surface_pset_f(screen, 11, 1, c1);
-    surface_pset_f(screen, 308, 1, c2);
-    surface_pset_f(screen, 11, 198, c3);
-    surface_pset_f(screen, 308, 198, c4);
+    pset_f(screen, 11, 1, c1);
+    pset_f(screen, 308, 1, c2);
+    pset_f(screen, 11, 198, c3);
+    pset_f(screen, 308, 198, c4);
 
     getch();
 }
@@ -97,16 +97,16 @@ void test_pixels_clipping(void) {
 
     surface_clear(screen, 0);
 
-    surface_pset(screen, 5, 100, 4);
-    surface_pset(screen, 314, 100, 4);
-    surface_pset(screen, 160, 5, 4);
-    surface_pset(screen, 160, 194, 4);
+    pset(screen, 5, 100, 4);
+    pset(screen, 314, 100, 4);
+    pset(screen, 160, 5, 4);
+    pset(screen, 160, 194, 4);
 
     for (i = 0; i < 10; ++i) {
-        surface_pset(screen, i - 5, 100, 15);
-        surface_pset(screen, 315 + i, 100, 15);
-        surface_pset(screen, 160, i - 5, 15);
-        surface_pset(screen, 160, 195 + i, 15);
+        pset(screen, i - 5, 100, 15);
+        pset(screen, 315 + i, 100, 15);
+        pset(screen, 160, i - 5, 15);
+        pset(screen, 160, 195 + i, 15);
     }
 
     getch();

TEST/RECT.C

@@ -1,5 +1,6 @@
 #include "rect.h"
-#include "dgl.h"
+#include "dgldraw.h"
+#include "dglrect.h"
 #include <stdio.h>
 
 // draws two rectangles. red pixels mark the extents of the rects. a
@@ -10,37 +11,37 @@ void test_rect(void) {
     surface_clear(screen, 0);
 
     x1 = 10; y1 = 10; x2 = 90; y2 = 90;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 1);
 
     x1 = 10; y1 = 110; x2 = 90; y2 = 190;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_rect_f(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_rect_f(screen, x1, y1, x2, y2, 1);
 
     x1 = 190; y1 = 90; x2 = 110; y2 = 10;
-    surface_pset(screen, x2 - 1, y2, 4);
-    surface_pset(screen, x2, y2 - 1, 4);
-    surface_pset(screen, x1 + 1, y2, 4);
-    surface_pset(screen, x1, y2 - 1, 4);
-    surface_pset(screen, x2 - 1, y1, 4);
-    surface_pset(screen, x2, y1 + 1, 4);
-    surface_pset(screen, x1 + 1, y1, 4);
-    surface_pset(screen, x1, y1 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 2);
+    pset(screen, x2 - 1, y2, 4);
+    pset(screen, x2, y2 - 1, 4);
+    pset(screen, x1 + 1, y2, 4);
+    pset(screen, x1, y2 - 1, 4);
+    pset(screen, x2 - 1, y1, 4);
+    pset(screen, x2, y1 + 1, 4);
+    pset(screen, x1 + 1, y1, 4);
+    pset(screen, x1, y1 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 2);
 
     getch();
 }
@@ -56,50 +57,50 @@ void test_rect_clipping(void) {
     surface_clear(screen, 0);
 
     x1 = -8; y1 = 10; x2 = 7; y2 = 25;
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 1);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 1);
 
-    surface_rect(screen, -16, 30, -1, 46, 10);
+    draw_rect(screen, -16, 30, -1, 46, 10);
 
     x1 = 20; y1 = -8; x2 = 35; y2 = 7;
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 2);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 2);
 
-    surface_rect(screen, 40, -16, 55, -1, 11);
+    draw_rect(screen, 40, -16, 55, -1, 11);
 
     x1 = 313; y1 = 170; x2 = 328; y2 = 185;
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 3);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 3);
 
-    surface_rect(screen, 320, 150, 335, 165, 12);
+    draw_rect(screen, 320, 150, 335, 165, 12);
 
     x1 = 285; y1 = 193; x2 = 300; y2 = 208;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 5);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 5);
 
-    surface_rect(screen, 265, 200, 280, 215, 13);
+    draw_rect(screen, 265, 200, 280, 215, 13);
 
     x1 = 150; y1 = -10; x2 = 170; y2 = 210;
-    surface_pset(screen, x1 - 1, 10, 4);
-    surface_pset(screen, x2 + 1, 10, 4);
-    surface_rect(screen, x1, y1, x2, y2, 7);
+    pset(screen, x1 - 1, 10, 4);
+    pset(screen, x2 + 1, 10, 4);
+    draw_rect(screen, x1, y1, x2, y2, 7);
 
     x1 = -10; y1 = 90; x2 = 330; y2 = 110;
-    surface_pset(screen, 10, y1 - 1, 4);
-    surface_pset(screen, 10, y2 + 1, 4);
-    surface_rect(screen, x1, y1, x2, y2, 8);
+    pset(screen, 10, y1 - 1, 4);
+    pset(screen, 10, y2 + 1, 4);
+    draw_rect(screen, x1, y1, x2, y2, 8);
 
     getch();
 }
@@ -112,37 +113,37 @@ void test_filled_rect(void) {
     surface_clear(screen, 0);
 
     x1 = 10; y1 = 10; x2 = 90; y2 = 90;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 1);
 
     x1 = 10; y1 = 110; x2 = 90; y2 = 190;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_filled_rect_f(screen, x1, y1, x2, y2, 1);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_filled_rect_f(screen, x1, y1, x2, y2, 1);
 
     x1 = 190; y1 = 90; x2 = 110; y2 = 10;
-    surface_pset(screen, x2 - 1, y2, 4);
-    surface_pset(screen, x2, y2 - 1, 4);
-    surface_pset(screen, x1 + 1, y2, 4);
-    surface_pset(screen, x1, y2 - 1, 4);
-    surface_pset(screen, x2 - 1, y1, 4);
-    surface_pset(screen, x2, y1 + 1, 4);
-    surface_pset(screen, x1 + 1, y1, 4);
-    surface_pset(screen, x1, y1 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 2);
+    pset(screen, x2 - 1, y2, 4);
+    pset(screen, x2, y2 - 1, 4);
+    pset(screen, x1 + 1, y2, 4);
+    pset(screen, x1, y2 - 1, 4);
+    pset(screen, x2 - 1, y1, 4);
+    pset(screen, x2, y1 + 1, 4);
+    pset(screen, x1 + 1, y1, 4);
+    pset(screen, x1, y1 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 2);
 
     getch();
 }
@@ -158,50 +159,50 @@ void test_filled_rect_clipping(void) {
     surface_clear(screen, 0);
 
     x1 = -8; y1 = 10; x2 = 7; y2 = 25;
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 1);
+    pset(screen, x2, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 1);
 
-    surface_filled_rect(screen, -16, 30, -1, 46, 10);
+    draw_filled_rect(screen, -16, 30, -1, 46, 10);
 
     x1 = 20; y1 = -8; x2 = 35; y2 = 7;
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_pset(screen, x2 + 1, y2, 4);
-    surface_pset(screen, x2, y2 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 2);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    pset(screen, x2 + 1, y2, 4);
+    pset(screen, x2, y2 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 2);
 
-    surface_filled_rect(screen, 40, -16, 55, -1, 11);
+    draw_filled_rect(screen, 40, -16, 55, -1, 11);
 
     x1 = 313; y1 = 170; x2 = 328; y2 = 185;
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1 - 1, y2, 4);
-    surface_pset(screen, x1, y2 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 3);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1 - 1, y2, 4);
+    pset(screen, x1, y2 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 3);
 
-    surface_filled_rect(screen, 320, 150, 335, 165, 12);
+    draw_filled_rect(screen, 320, 150, 335, 165, 12);
 
     x1 = 285; y1 = 193; x2 = 300; y2 = 208;
-    surface_pset(screen, x1 - 1, y1, 4);
-    surface_pset(screen, x1, y1 - 1, 4);
-    surface_pset(screen, x2 + 1, y1, 4);
-    surface_pset(screen, x2, y1 - 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 5);
+    pset(screen, x1 - 1, y1, 4);
+    pset(screen, x1, y1 - 1, 4);
+    pset(screen, x2 + 1, y1, 4);
+    pset(screen, x2, y1 - 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 5);
 
-    surface_filled_rect(screen, 265, 200, 280, 215, 13);
+    draw_filled_rect(screen, 265, 200, 280, 215, 13);
 
     x1 = 150; y1 = -10; x2 = 170; y2 = 210;
-    surface_pset(screen, x1 - 1, 10, 4);
-    surface_pset(screen, x2 + 1, 10, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 7);
+    pset(screen, x1 - 1, 10, 4);
+    pset(screen, x2 + 1, 10, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 7);
 
     x1 = -10; y1 = 90; x2 = 330; y2 = 110;
-    surface_pset(screen, 10, y1 - 1, 4);
-    surface_pset(screen, 10, y2 + 1, 4);
-    surface_filled_rect(screen, x1, y1, x2, y2, 8);
+    pset(screen, 10, y1 - 1, 4);
+    pset(screen, 10, y2 + 1, 4);
+    draw_filled_rect(screen, x1, y1, x2, y2, 8);
 
     getch();
 }

TEST/SURFACE.C

@@ -1,5 +1,5 @@
 #include "surface.h"
-#include "dgl.h"
+#include "dglgfx.h"
 #include <stdio.h>
 
 extern SURFACE *backbuffer;

TEST/TEST.C

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <signal.h>
 #include "dgl.h"
+#include "dglgfx.h"
 #include "helpers.h"
 
 #include "blit.h"
@@ -30,7 +31,7 @@ int main(void) {
 
     ASSERT(screen == NULL);
 
-    if (!video_init()) {
+    if (!gfx_init()) {
         printf("Error initializing video: %s\n", dgl_last_error_message());
         return 1;
     }
@@ -46,8 +47,8 @@ int main(void) {
     test_mouse();
     test_events();
     test_fixed();
-    test_vector2i();
-    test_vector2f();
+    test_vec2i();
+    test_vec2();
     test_surface_clear();
     test_surface_copy();
     test_pixels_1();

TEST/TEXT.C

@@ -1,5 +1,7 @@
 #include "text.h"
-#include "dgl.h"
+#include "dglgfx.h"
+#include "dgldraw.h"
+#include "dglmath.h"
 #include <stdio.h>
 #include <string.h>
 
@@ -14,19 +16,19 @@ void test_text(void) {
     surface_clear(screen, 0);
     memset(string, 0, 255);
 
-    surface_text(screen, 10, 10, 15, "Hello, world!");
-    surface_text_f(screen, 170, 10, 15, "Hello, world!");
+    draw_text(screen, 10, 10, 15, "Hello, world!");
+    draw_text_f(screen, 170, 10, 15, "Hello, world!");
 
-    surface_filled_rect(screen, 8, 28, 114, 40, 7);
-    surface_text(screen, 10, 30, 15, "transparency!");
-    surface_filled_rect_f(screen, 168, 28, 274, 40, 7);
-    surface_text_f(screen, 170, 30, 15, "transparency!");
+    draw_filled_rect(screen, 8, 28, 114, 40, 7);
+    draw_text(screen, 10, 30, 15, "transparency!");
+    draw_filled_rect_f(screen, 168, 28, 274, 40, 7);
+    draw_text_f(screen, 170, 30, 15, "transparency!");
 
-    surface_text(screen, 10, 50, 15, "line 1\nline 2");
-    surface_text_f(screen, 170, 50, 15, "line 1\nline 2");
+    draw_text(screen, 10, 50, 15, "line 1\nline 2");
+    draw_text_f(screen, 170, 50, 15, "line 1\nline 2");
 
-    surface_printf(screen, 10, 70, 15, "printf pi %.5f", PI);
-    surface_printf_f(screen, 170, 70, 15, "printf pi %.5f", PI);
+    draw_printf(screen, 10, 70, 15, "printf pi %.5f", PI);
+    draw_printf_f(screen, 170, 70, 15, "printf pi %.5f", PI);
 
     p = &string[0];
     for (i = 1; i <= 127; ++i, ++p) {
@@ -40,8 +42,8 @@ void test_text(void) {
             *p = (char)i;
     }
 
-    surface_text(screen, 10, 100, 15, string);
-    surface_text_f(screen, 170, 100, 15, string);
+    draw_text(screen, 10, 100, 15, string);
+    draw_text_f(screen, 170, 100, 15, string);
 
     getch();
 }
@@ -59,36 +61,36 @@ void test_text_clipping(void) {
     surface_clear(screen, 0);
 
     x = -32; y = 10;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 9, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 9, message);
 
     x = 80; y = -4;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 10, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 10, message);
 
     x = 288; y = 120;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 11, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 11, message);
 
     x = 200; y = 196;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 12, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 12, message);
 
     x = -232; y = 10;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 5, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 5, message);
 
     x = 80; y = -24;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 6, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 6, message);
 
     x = 360; y = 120;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 7, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 7, message);
 
     x = 200; y = 240;
-    surface_rect(screen, x - 1, y - 1, x + width, y + height, 4);
-    surface_text(screen, x, y, 8, message);
+    draw_rect(screen, x - 1, y - 1, x + width, y + height, 4);
+    draw_text(screen, x, y, 8, message);
 
     getch();
 }

TEST/VECTOR2.C

@@ -1,134 +1,134 @@
 #include "vector2.h"
-#include "dgl.h"
+#include "dglvec2.h"
 #include "helpers.h"
 
-void test_vector2i(void) {
-    VECTOR2I a, b, c;
+void test_vec2i(void) {
+    VEC2I a, b, c;
     int i;
 
-    c = vector2i(3, 7);
+    c = vec2i(3, 7);
     ASSERT(c.x == 3 && c.y == 7);
 
-    vector2i_set(&c, 1, 2);
+    vec2i_set(&c, 1, 2);
     ASSERT(c.x == 1 && c.y == 2);
 
-    a = vector2i(1, 2);
-    b = vector2i(1, 2);
-    ASSERT(vector2i_equals(a, b));
+    a = vec2i(1, 2);
+    b = vec2i(1, 2);
+    ASSERT(vec2i_equals(a, b));
 
-    a = vector2i(3, 4);
-    b = vector2i(1, 2);
+    a = vec2i(3, 4);
+    b = vec2i(1, 2);
 
-    c = vector2i_add(a, b);
+    c = vec2i_add(a, b);
     ASSERT(c.x == 4 && c.y == 6);
 
-    c = vector2i_sub(a, b);
+    c = vec2i_sub(a, b);
     ASSERT(c.x == 2 && c.y == 2);
 
-    c = vector2i_mul(a, b);
+    c = vec2i_mul(a, b);
     ASSERT(c.x == 3 && c.y == 8);
 
-    c = vector2i_muls(a, 2);
+    c = vec2i_muls(a, 2);
     ASSERT(c.x == 6 && c.y == 8);
 
-    c = vector2i_div(a, b);
+    c = vec2i_div(a, b);
     ASSERT(c.x == 3 && c.y == 2);
 
-    c = vector2i_divs(a, 2);
+    c = vec2i_divs(a, 2);
     ASSERT(c.x == 1 && c.y == 2);
 
-    a = vector2i(1, 1);
-    b = vector2i(1, 3);
-    i = vector2i_distance(a, b);
+    a = vec2i(1, 1);
+    b = vec2i(1, 3);
+    i = vec2i_distance(a, b);
     ASSERT(i == 2);
 
-    i = vector2i_distancesq(a, b);
+    i = vec2i_distancesq(a, b);
     ASSERT(i == 4);
 
-    a = vector2i(-12, 16);
-    b = vector2i(12, 9);
-    i = vector2i_dot(a, b);
+    a = vec2i(-12, 16);
+    b = vec2i(12, 9);
+    i = vec2i_dot(a, b);
     ASSERT(i == 0);
 
-    a = vector2i(-3, 0);
-    i = vector2i_length(a);
+    a = vec2i(-3, 0);
+    i = vec2i_length(a);
     ASSERT(i == 3);
 
-    i = vector2i_lengthsq(a);
+    i = vec2i_lengthsq(a);
     ASSERT(i == 9);
 
-    a = vector2i(5, 0);
-    b = vector2i(10, 0);
-    c = vector2i_lerp(a, b, 0.5f);
+    a = vec2i(5, 0);
+    b = vec2i(10, 0);
+    c = vec2i_lerp(a, b, 0.5f);
     ASSERT(c.x == 7 && c.y == 0);
 }
 
-void test_vector2f(void) {
-    VECTOR2F a, b, c;
-    float f;
+void test_vec2(void) {
+    VEC2 a, b, c;
+    fixed f;
 
-    c = vector2f(3.0f, 7.0f);
-    ASSERT(F_EQU(c.x, 3.0f) && F_EQU(c.y, 7.0f));
+    c = vec2(FTOFIX(3.0f), FTOFIX(7.0f));
+    ASSERT(c.x == FTOFIX(3.0f) && c.y == FTOFIX(7.0f));
 
-    vector2f_set(&c, 1.0f, 2.0f);
-    ASSERT(F_EQU(c.x, 1.0f) && F_EQU(c.y, 2.0f));
+    vec2_set(&c, FTOFIX(1.0f), FTOFIX(2.0f));
+    ASSERT(c.x == FTOFIX(1.0f) && c.y == FTOFIX(2.0f));
 
-    a = vector2f(1.0f, 2.0f);
-    b = vector2f(1.0f, 2.0f);
-    ASSERT(vector2f_equals(a, b));
+    a = vec2(FTOFIX(1.0f), FTOFIX(2.0f));
+    b = vec2(FTOFIX(1.0f), FTOFIX(2.0f));
+    ASSERT(vec2_equals(a, b));
 
-    a = vector2f(3.0f, 4.0f);
-    b = vector2f(1.0f, 2.0f);
+    a = vec2(FTOFIX(3.0f), FTOFIX(4.0f));
+    b = vec2(FTOFIX(1.0f), FTOFIX(2.0f));
 
-    c = vector2f_add(a, b);
-    ASSERT(F_EQU(c.x, 4.0f) && F_EQU(c.y, 6.0f));
+    c = vec2_add(a, b);
+    ASSERT(c.x == FTOFIX(4.0f) && c.y == FTOFIX(6.0f));
 
-    c = vector2f_sub(a, b);
-    ASSERT(F_EQU(c.x, 2.0f) && F_EQU(c.y, 2.0f));
+    c = vec2_sub(a, b);
+    ASSERT(c.x == FTOFIX(2.0f) && c.y == FTOFIX(2.0f));
 
-    c = vector2f_mul(a, b);
-    ASSERT(F_EQU(c.x, 3.0f) && F_EQU(c.y, 8.0f));
+    c = vec2_mul(a, b);
+    ASSERT(c.x == FTOFIX(3.0f) && c.y == FTOFIX(8.0f));
 
-    c = vector2f_muls(a, 0.5f);
-    ASSERT(F_EQU(c.x, 1.5f) && F_EQU(c.y, 2.0f));
+    c = vec2_muls(a, FTOFIX(0.5f));
+    ASSERT(c.x == FTOFIX(1.5f) && c.y == FTOFIX(2.0f));
 
-    c = vector2f_div(a, b);
-    ASSERT(F_EQU(c.x, 3.0f) && F_EQU(c.y, 2.0f));
+    c = vec2_div(a, b);
+    ASSERT(c.x == FTOFIX(3.0f) && c.y == FTOFIX(2.0f));
 
-    c = vector2f_divs(a, 0.5f);
-    ASSERT(F_EQU(c.x, 6.0f) && F_EQU(c.y, 8.0f));
+    c = vec2_divs(a, FTOFIX(0.5f));
+    ASSERT(c.x == FTOFIX(6.0f) && c.y == FTOFIX(8.0f));
 
-    a = vector2f(1.0f, 1.0f);
-    b = vector2f(1.0f, 3.0f);
-    f = vector2f_distance(a, b);
-    ASSERT(F_EQU(f, 2.0f));
+    a = vec2(FTOFIX(1.0f), FTOFIX(1.0f));
+    b = vec2(FTOFIX(1.0f), FTOFIX(3.0f));
+    f = vec2_distance(a, b);
+    ASSERT(f == FTOFIX(2.0f));
 
-    f = vector2f_distancesq(a, b);
-    ASSERT(F_EQU(f, 4.0f));
+    f = vec2_distancesq(a, b);
+    ASSERT(f == FTOFIX(4.0f));
 
-    a = vector2f(-12.0f, 16.0f);
-    b = vector2f(12.0f, 9.0f);
-    f = vector2f_dot(a, b);
-    ASSERT(F_EQU(f, 0.0f));
+    a = vec2(FTOFIX(-12.0f), FTOFIX(16.0f));
+    b = vec2(FTOFIX(12.0f), FTOFIX(9.0f));
+    f = vec2_dot(a, b);
+    ASSERT(f == 0);
 
-    a = vector2f(-3.0f, 0.0f);
-    f = vector2f_length(a);
-    ASSERT(F_EQU(f, 3.0f));
+    a = vec2(FTOFIX(-3.0f), FTOFIX(0.0f));
+    f = vec2_length(a);
+    ASSERT(f == FTOFIX(3.0f));
 
-    f = vector2f_lengthsq(a);
-    ASSERT(F_EQU(f, 9.0f));
+    f = vec2_lengthsq(a);
+    ASSERT(f == FTOFIX(9.0f));
 
-    a = vector2f(7.0f, 7.0f);
-    c = vector2f_normalize(a);
-    ASSERT(F_EQU(c.x, 0.70710f) && F_EQU(c.y, 0.70710f));
+    a = vec2(FTOFIX(7.0f), FTOFIX(7.0f));
+    c = vec2_normalize(a);
+    ASSERT(c.x == FTOFIX(0.70710f) && c.y == FTOFIX(0.70710f));
 
-    a = vector2f(10.0f, 0.0f);
-    c = vector2f_set_length(a, 2.0f);
-    ASSERT(F_EQU(c.x, 2.0f) && F_EQU(c.y, 0.0f));
+    a = vec2(FTOFIX(10.0f), FTOFIX(0.0f));
+    c = vec2_set_length(a, FTOFIX(2.0f));
+    ASSERT(c.x == FTOFIX(2.0f) && c.y == FTOFIX(0.0f));
 
-    a = vector2f(5.0f, 0.0f);
-    b = vector2f(10.0f, 0.0f);
-    c = vector2f_lerp(a, b, 0.5f);
-    ASSERT(F_EQU(c.x, 7.5f) && F_EQU(c.y, 0.0f));
+    a = vec2(FTOFIX(5.0f), FTOFIX(0.0f));
+    b = vec2(FTOFIX(10.0f), FTOFIX(0.0f));
+    c = vec2_lerp(a, b, FTOFIX(0.5f));
+    ASSERT(c.x == FTOFIX(7.5f) && c.y == FTOFIX(0.0f));
 }
 

TEST/VECTOR2.H

@@ -1,8 +1,8 @@
 #ifndef DGL_TEST_VECTOR2_H_INCLUDED
 #define DGL_TEST_VECTOR2_H_INCLUDED
 
-void test_vector2i(void);
-void test_vector2f(void);
+void test_vec2i(void);
+void test_vec2(void);
 
 #endif