infcubes crashes

[dosdemo] / src / dos / gfx.h

diff --git a/src/dos/gfx.h b/src/dos/gfx.h
index b19c992..f23e0f6 100644 (file)
--- a/src/dos/gfx.h
+++ b/src/dos/gfx.h
@@ -5,7 +5,7 @@
 extern "C" {
 #endif
 
-void *set_video_mode(int xsz, int ysz, int bpp);
+void *set_video_mode(int xsz, int ysz, int bpp, int nbuf);
 int set_text_mode(void);
 
 int get_color_depth(void);
@@ -15,7 +15,42 @@ int get_color_mask(unsigned int *rmask, unsigned int *gmask, unsigned int *bmask
 
 void set_palette(int idx, int r, int g, int b);
 
+enum {
+       FLIP_NOW,
+       FLIP_VBLANK,
+};
+/* page flip and return pointer to the start of the display area (front buffer) */
+void *page_flip(int vsync);
+
+#ifdef __WATCOMC__
 void wait_vsync(void);
+#pragma aux wait_vsync = \
+       "mov dx, 0x3da" \
+       "l1:" \
+       "in al, dx" \
+       "and al, 0x8" \
+       "jnz l1" \
+       "l2:" \
+       "in al, dx" \
+       "and al, 0x8" \
+       "jz l2" \
+       modify[al dx];
+#endif
+
+#ifdef __DJGPP__
+#define wait_vsync()  asm volatile ( \
+       "mov $0x3da, %%dx\n\t" \
+       "0:\n\t" \
+       "in %%dx, %%al\n\t" \
+       "and $8, %%al\n\t" \
+       "jnz 0b\n\t" \
+       "0:\n\t" \
+       "in %%dx, %%al\n\t" \
+       "and $8, %%al\n\t" \
+       "jz 0b\n\t" \
+       :::"%eax","%edx")
+#endif
+
 
 #ifdef __cplusplus
 }