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Window: Blit24bpp optimizations

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This commit is contained in:
Blue 2021-12-07 16:12:59 +01:00
parent 2868eb5534
commit 3da05b2f05
1 changed files with 11 additions and 6 deletions
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17
ProjectPSX.WinForms/UI/Window.cs
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@ -169,16 +169,20 @@ namespace ProjectPSX {
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private void blit24bpp(int[] vramBits) {
private unsafe void blit24bpp(int[] vramBits) {
int yRangeOffset = (240 - (displayY2 - displayY1)) >> (verticalRes == 480 ? 0 : 1);
if (yRangeOffset < 0) yRangeOffset = 0;
var display = new Span<int>(this.display.BitmapData.ToPointer(), 0x80000);
Span<int> scanLine = stackalloc int[horizontalRes];
for (int y = yRangeOffset; y < verticalRes - yRangeOffset; y++) {
int offset = 0;
var startXYPosition = displayVRAMXStart + ((y - yRangeOffset + displayVRAMYStart) * 1024);
for (int x = 0; x < horizontalRes; x += 2) {
int p0rgb = vramBits[(offset++ + displayVRAMXStart) + ((y - yRangeOffset + displayVRAMYStart) * 1024)];
int p1rgb = vramBits[(offset++ + displayVRAMXStart) + ((y - yRangeOffset + displayVRAMYStart) * 1024)];
int p2rgb = vramBits[(offset++ + displayVRAMXStart) + ((y - yRangeOffset + displayVRAMYStart) * 1024)];
int p0rgb = vramBits[startXYPosition + offset++];
int p1rgb = vramBits[startXYPosition + offset++];
int p2rgb = vramBits[startXYPosition + offset++];
ushort p0bgr555 = GetPixelBGR555(p0rgb);
ushort p1bgr555 = GetPixelBGR555(p1rgb);
@ -197,9 +201,10 @@ namespace ProjectPSX {
int p0rgb24bpp = p0R << 16 | p0G << 8 | p0B;
int p1rgb24bpp = p1R << 16 | p1G << 8 | p1B;
display.DrawPixel(x, y, p0rgb24bpp);
display.DrawPixel(x + 1, y, p1rgb24bpp);
scanLine[x] = p0rgb24bpp;
scanLine[x + 1] = p1rgb24bpp;
}
scanLine.CopyTo(display.Slice(y * 1024));
}
}