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softgpu: Avoid some ScreenToDrawing() overhead.

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Unknown W. Brackets 2013-12-08 22:38:09 -08:00
parent 30394df775
commit cdccf06b62
1 changed files with 6 additions and 3 deletions
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9
GPU/Software/Rasterizer.cpp
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@ -875,11 +875,14 @@ void DrawTriangleSlice(
int w1 = w1_base;
int w2 = w2_base;
for (pprime.x = minX; pprime.x <= maxX; pprime.x +=16,
pprime.x = minX;
DrawingCoords p = TransformUnit::ScreenToDrawing(pprime);
for (; pprime.x <= maxX; pprime.x +=16,
w0 += orient2dIncX(d12.y)*16,
w1 += orient2dIncX(-d02.y)*16,
w2 += orient2dIncX(d01.y)*16) {
DrawingCoords p = TransformUnit::ScreenToDrawing(pprime);
w2 += orient2dIncX(d01.y)*16,
p.x = (p.x + 1) & 0x3FF) {
// If p is on or inside all edges, render pixel
// TODO: Should we render if the pixel is both on the left and the right side? (i.e. degenerated triangle)