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GPU: Elide VRAM copies when they will have no effect

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Can provide a performance boost in most games because of the redundant
copy they issue once a frame.
This commit is contained in:
Connor McLaughlin 2021-02-06 19:10:46 +10:00
parent 5a9abd55a1
commit c03c4cb95a
1 changed files with 9 additions and 2 deletions
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11
src/core/gpu_commands.cpp
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@ -602,8 +602,15 @@ bool GPU::HandleCopyRectangleVRAMToVRAMCommand()
Log_DebugPrintf("Copy rectangle from VRAM to VRAM src=(%u,%u), dst=(%u,%u), size=(%u,%u)", src_x, src_y, dst_x, dst_y,
width, height);
FlushRender();
CopyVRAM(src_x, src_y, dst_x, dst_y, width, height);
// Some VRAM copies aren't going to do anything. Most games seem to send a 2x2 VRAM copy at the end of a frame.
const bool skip_copy =
width == 0 || height == 0 || (src_x == dst_x && src_y == dst_y && !m_GPUSTAT.set_mask_while_drawing);
if (!skip_copy)
{
FlushRender();
CopyVRAM(src_x, src_y, dst_x, dst_y, width, height);
}
m_stats.num_vram_copies++;
AddCommandTicks(width * height * 2);
EndCommand();