-/* video stuff */
-static void gp2x_video_flip_(void)
-{
- unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
- unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
-
- gp2x_memregs[0x2910>>1] = msw;
- gp2x_memregs[0x2914>>1] = msw;
- gp2x_memregs[0x290E>>1] = lsw;
- gp2x_memregs[0x2912>>1] = lsw;
-
- // jump to other buffer:
- g_screen_ptr = gp2x_screens[++screensel&3];
-}
-
-/* doulblebuffered flip */
-static void gp2x_video_flip2_(void)
-{
- unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
-
- gp2x_memregs[0x2910>>1] = msw;
- gp2x_memregs[0x2914>>1] = msw;
- gp2x_memregs[0x290E>>1] = 0;
- gp2x_memregs[0x2912>>1] = 0;
-
- // jump to other buffer:
- g_screen_ptr = gp2x_screens[++screensel&1];
-}
-
-static void gp2x_video_changemode_ll_(int bpp)
-{
- gp2x_memregs[0x28DA>>1] = (((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
- gp2x_memregs[0x290C>>1] = 320*((bpp+1)/8); /*line width in bytes*/
-}
-
-static void gp2x_video_setpalette_(int *pal, int len)
-{
- unsigned short *g = (unsigned short *)pal;
- volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
-
- gp2x_memregs[0x2958>>1] = 0;
-
- len *= 2;
- while (len--)
- *memreg = *g++;
-}
-
-static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
-{
- float escalaw, escalah;
- int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
- unsigned short scalw;
-
- // set offset
- gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
- gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
-
- escalaw = 1024.0; // RGB Horiz LCD
- escalah = 320.0; // RGB Vert LCD
-
- if (gp2x_memregs[0x2800>>1]&0x100) //TV-Out
- {
- escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
- if (gp2x_memregs[0x2818>>1] == 287) //PAL
- escalah=274.0; // RGB Vert TV PAL
- else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
- escalah=331.0; // RGB Vert TV NTSC
- }
-
- // scale horizontal
- scalw = (unsigned short)((float)escalaw *(W/320.0));
- /* if there is no horizontal scaling, vertical doesn't work.
- * Here is a nasty wrokaround... */
- if (H != 240 && W == 320) scalw--;
- gp2x_memregs[0x2906>>1]=scalw;
- // scale vertical
- gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
-}
-
-static void gp2x_video_wait_vsync_(void)
-{
- unsigned short v = gp2x_memregs[0x1182>>1];
- while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10))
- spend_cycles(1024);
-}
-