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desmume
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gpu: reorder the layer rendering, capture, and final display, to be a little less confusing, and it should get rid of a frame of latency on motion blurs

This commit is contained in:
zeromus 2009-05-21 08:55:37 +00:00
parent 4bbb85bb83
commit 698cfe1f93
1 changed files with 16 additions and 29 deletions
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45
desmume/src/GPU.cpp
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@ -71,8 +71,7 @@ GPU::MosaicLookup GPU::mosaicLookup;
CACHE_ALIGN u8 GPU_screen[4*256*192];
CACHE_ALIGN u8 GPU_tempScreen[4*256*192];
CACHE_ALIGN u8 GPU_tempScanline[4*256]; //only one scanline
bool GPU_tempScanline_valid; //whether GPU_tempScanline is valid (if not, fetch it from GPU_screen)
CACHE_ALIGN u8 *GPU_tempScanline;
CACHE_ALIGN u8 sprWin[256];
@ -2790,10 +2789,7 @@ static void GPU_ligne_DispCapture(u16 l)
//INFO("Capture screen (BG + OBJ + 3D)\n");
u8 *src;
if(GPU_tempScanline_valid)
src = (u8*)(GPU_tempScanline);
else
src = (u8 *)(GPU_tempScreen + (MainScreen.offset + l) * 512);
src = (u8*)(GPU_tempScanline);
CAPCOPY(src,cap_dst);
}
break;
@ -2837,10 +2833,7 @@ static void GPU_ligne_DispCapture(u16 l)
if (gpu->dispCapCnt.srcA == 0)
{
// Capture screen (BG + OBJ + 3D)
if(GPU_tempScanline_valid)
srcA = (u16*)(GPU_tempScanline);
else
srcA = (u16*)((u8 *)GPU_tempScreen + (MainScreen.offset + l) * 512);
srcA = (u16*)(GPU_tempScanline);
}
else
{
@ -3039,7 +3032,6 @@ void GPU::update_winh(int WIN_NUM)
void GPU_ligne(NDS_Screen * screen, u16 l)
{
GPU * gpu = screen->gpu;
GPU_tempScanline_valid = false;
//here is some setup which is only done on line 0
if(l == 0) {
@ -3077,7 +3069,17 @@ void GPU_ligne(NDS_Screen * screen, u16 l)
gpu->setup_windows<0>();
gpu->setup_windows<1>();
// This could almost be changed to use function pointers
//always generate the 2d+3d, no matter what we're displaying, since we may need to capture it
//(if this seems inefficient in some cases, consider that the speed in those cases is not really a problem)
GPU_tempScanline = screen->gpu->currDst = (u8 *)(GPU_tempScreen) + (screen->offset + l) * 512;
GPU_ligne_layer(screen, l);
if (gpu->core == GPU_MAIN)
{
GPU_ligne_DispCapture(l);
if (l == 191) { disp_fifo.head = disp_fifo.tail = 0; }
}
switch (gpu->dispMode)
{
case 0: // Display Off(Display white)
@ -3090,8 +3092,7 @@ void GPU_ligne(NDS_Screen * screen, u16 l)
break;
case 1: // Display BG and OBJ layers
screen->gpu->currDst = (u8 *)(GPU_tempScreen) + (screen->offset + l) * 512;
GPU_ligne_layer(screen, l);
//do nothing: it has already been generated into the right place
break;
case 2: // Display framebuffer
@ -3110,22 +3111,8 @@ void GPU_ligne(NDS_Screen * screen, u16 l)
break;
}
if (gpu->core == GPU_MAIN)
{
//when not displaying the BG and OBJ, we might still need to generate it
//for purposes of capturing. therefore:
//TODO - LOW PRIORITY OPTIMIZATION - based on capture settings, selectively generate this
//we have already optimized it a tiny bit by putting it under the if(core is main)
if(gpu->dispMode != 1)
{
screen->gpu->currDst = (u8 *)(GPU_tempScanline);
GPU_ligne_layer(screen, l);
GPU_tempScanline_valid = true;
}
GPU_ligne_DispCapture(l);
if (l == 191) { disp_fifo.head = disp_fifo.tail = 0; }
}
GPU_ligne_MasterBrightness(screen, l);
}