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-Optimizations to frame buffer drawing

This commit is contained in:
cyberwarriorx 2007-01-26 06:32:39 +00:00
parent 4f32c12385
commit 9c816b2a50
1 changed files with 16 additions and 23 deletions
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37
desmume/src/GPU.h
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@ -517,30 +517,23 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
return; return;
case 2: // Display framebuffer case 2: // Display framebuffer
{ {
//addition from Normatt int ii = l * 256 * 2;
/* we only draw one of the VRAM blocks */ u8 * vram;
vram_bank = gpu->dispCnt.bits.VRAM_Block ;
// if(!(gpu->lcd)) dest = mdst; else dest = sdst; /* we only draw one of the VRAM blocks */
dest = dst ; vram_bank = gpu->dispCnt.bits.VRAM_Block ;
{
int ii = l * 256 * 2;
for (i=0; i<(256 * 2); i+=2)
{
u8 * vram ;
if (MMU.vram_mode[vram_bank] & 4)
{
vram = ARM9Mem.ARM9_LCD + (MMU.vram_mode[vram_bank] & 3) * 0x20000;
} else
{
vram = ARM9Mem.ARM9_ABG + MMU.vram_mode[vram_bank] * 0x20000;
}
T2WriteWord(dest, i, T1ReadWord(vram, ii)); // This probably only needs to be calculated once per frame, but at least it's better than before >_<
ii+=2; if (MMU.vram_mode[vram_bank] & 4)
} vram = ARM9Mem.ARM9_LCD + (MMU.vram_mode[vram_bank] & 3) * 0x20000;
return; else
} vram = ARM9Mem.ARM9_ABG + MMU.vram_mode[vram_bank] * 0x20000;
for (i=0; i<(256 * 2); i+=2)
{
T2WriteWord(dst, i, T1ReadWord(vram, ii));
ii+=2;
}
} }
return; return;
case 3: case 3: