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softgpu: Optimization, part 2.

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Tony Wasserka 2013-07-24 10:42:04 +02:00 committed by neobrain
parent 0c6a9dcf50
commit b22a82d350
2 changed files with 7 additions and 1 deletions
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7
GPU/Software/Rasterizer.cpp
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@ -372,9 +372,14 @@ static inline Vec4<int> GetTextureFunctionOutput(const Vec3<int>& prim_color_rgb
return Vec4<int>(out_rgb.r(), out_rgb.g(), out_rgb.b(), out_a);
}
// Draws triangle, vertices specified in counter-clockwise direction (TODO: Make sure this is actually enforced)
// Draws triangle, vertices specified in counter-clockwise direction
void DrawTriangle(const VertexData& v0, const VertexData& v1, const VertexData& v2)
{
// Drop primitives which are not in CCW order.
if (((int)v1.drawpos.x - (int)v0.drawpos.x) * ((int)v2.drawpos.y - (int)v0.drawpos.y) - ((int)v1.drawpos.y - (int)v0.drawpos.y) * ((int)v2.drawpos.x - (int)v0.drawpos.x) < 0)
return;
int minX = std::min(std::min(v0.drawpos.x, v1.drawpos.x), v2.drawpos.x);
int minY = std::min(std::min(v0.drawpos.y, v1.drawpos.y), v2.drawpos.y);
int maxX = std::max(std::max(v0.drawpos.x, v1.drawpos.x), v2.drawpos.x);

1
GPU/Software/Rasterizer.h
View File

@ -21,6 +21,7 @@
namespace Rasterizer {
// Draws a triangle if its vertices are specified in counter-clockwise order
void DrawTriangle(const VertexData& v0, const VertexData& v1, const VertexData& v2);
}