107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
#include "dgl.h"
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#include "keyboard.h"
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#include "mouse.h"
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#include "gfx.h"
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#include "util.h"
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#include <stdlib.h>
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#include <go32.h>
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#include <sys/nearptr.h>
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static boolean _initialized = FALSE;
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static DGL_ERROR _last_error = DGL_NONE;
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boolean dgl_init(void) {
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if (_initialized) {
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dgl_set_error(DGL_ALREADY_INIT);
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return FALSE;
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}
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if (__djgpp_nearptr_enable() == 0) {
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dgl_set_error(DGL_NEARPTR_ENABLE_FAILURE);
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return FALSE;
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}
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srandom((int)sys_clock());
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// first call will return zero, so call here just to "init"
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sys_clock();
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sys_ticks();
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if (!video_init())
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return FALSE;
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if (!keyboard_init())
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return FALSE;
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if (!mouse_init())
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return FALSE;
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_initialized = TRUE;
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return TRUE;
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}
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boolean dgl_shutdown(void) {
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if (!_initialized)
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return TRUE; // don't care
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// remove installed services
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if (!mouse_shutdown())
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return FALSE;
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if (!keyboard_shutdown())
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return FALSE;
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if (!video_shutdown())
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return FALSE;
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__djgpp_nearptr_disable();
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_initialized = FALSE;
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return TRUE;
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}
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DGL_ERROR dgl_last_error(void) {
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return _last_error;
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}
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const char* dgl_last_error_message(void) {
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switch (_last_error) {
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case DGL_NONE:
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return "No error.";
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case DGL_ALREADY_INIT:
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return "DGL is already initialized.";
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case DGL_NEARPTR_ENABLE_FAILURE:
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return "Failed to enable DJGPP near pointers.";
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case DGL_VIDEO_ALREADY_INITIALIZED:
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return "Video subsystem is already initialized.";
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case DGL_VIDEO_MODE_13H_INIT_FAILURE:
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return "Failed to set VGA mode 13h.";
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case DGL_VIDEO_TEXT_MODE_INIT_FAILURE:
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return "Failed to set text mode.";
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case DGL_KEYBOARD_ALREADY_INITIALIZED:
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return "Keyboard subsystem is already initialized.";
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case DGL_KEYBOARD_IRQ_INSTALL_FAILURE:
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return "Failed to install IRQ handler for keyboard.";
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case DGL_KEYBOARD_IRQ_RESTORE_FAILURE:
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return "Failed to restore original keyboard IRQ handler.";
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case DGL_KEYBOARD_UPDATE_LED_FAILURE:
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return "Failed to update keyboard LED state.";
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case DGL_MOUSE_ALREADY_INITIALIZED:
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return "Mouse subsystem is already initialized.";
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case DGL_MOUSE_ALLOCATE_CALLBACK_FAILURE:
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return "Failed to allocate mouse handler callback.";
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case DGL_MOUSE_FREE_CALLBACK_FAILURE:
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return "Failed to free mouse handler callback.";
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case DGL_MOUSE_INT_CALLBACK_SET_FAILURE:
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return "Failed to set mouse interrupt handler callback.";
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case DGL_MOUSE_INT_CALLBACK_RESTORE_FAILURE:
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return "Failed to restore original mouse interrupt handler callback.";
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case DGL_IO_ERROR:
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return "File IO error.";
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case DGL_PCX_BAD_FORMAT:
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return "PCX file unsupported format or bad file.";
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default:
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return "Unknown error.";
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}
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}
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void dgl_set_error(DGL_ERROR error) {
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_last_error = error;
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}
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