libdgl/DGLRECT.H
Gered 62af8575c6 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
2020-07-19 19:24:48 -04:00

50 lines
908 B
C
Executable file

#ifndef LIBDGL_DGLRECT_H
#define LIBDGL_DGLRECT_H
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
int x;
int y;
int width;
int height;
} RECT;
static RECT rect(int x, int y, int width, int height);
static int rect_right(const RECT *r);
static int rect_bottom(const RECT *r);
// --------------------------------------------------------------------------
static RECT rect(int x, int y, int width, int height) {
RECT result;
result.x = x;
result.y = y;
result.width = width;
result.height = height;
return result;
}
static int rect_right(const RECT *r) {
if (r->width)
return r->x + r->width - 1;
else
return r->x;
}
static int rect_bottom(const RECT *r) {
if (r->height)
return r->y + r->height - 1;
else
return r->y;
}
#ifdef __cplusplus
}
#endif
#endif