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Software renderer: Add a zfreeze related TODO.

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This commit is contained in:
Tony Wasserka 2013-12-30 20:17:56 +01:00
parent a5bfdbf6cd
commit bbde075420
1 changed files with 4 additions and 0 deletions
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4
Source/Core/VideoBackends/Software/Src/Rasterizer.cpp
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@ -385,6 +385,10 @@ void DrawTriangleFrontFace(OutputVertexData *v0, OutputVertexData *v1, OutputVer
float w[3] = { 1.0f / v0->projectedPosition.w, 1.0f / v1->projectedPosition.w, 1.0f / v2->projectedPosition.w }; float w[3] = { 1.0f / v0->projectedPosition.w, 1.0f / v1->projectedPosition.w, 1.0f / v2->projectedPosition.w };
InitSlope(&WSlope, w[0], w[1], w[2], fltdx31, fltdx12, fltdy12, fltdy31); InitSlope(&WSlope, w[0], w[1], w[2], fltdx31, fltdx12, fltdy12, fltdy31);
// TODO: The zfreeze emulation is not quite correct, yet!
// Many things might prevent us from reaching this line (culling, clipping, scissoring).
// However, the zslope is always guaranteed to be calculated unless all vertices are trivially rejected during clipping!
// We're currently sloppy at this since we abort early if any of the culling/clipping/scissoring tests fail.
if (!bpmem.genMode.zfreeze || !g_SWVideoConfig.bZFreeze) if (!bpmem.genMode.zfreeze || !g_SWVideoConfig.bZFreeze)
InitSlope(&ZSlope, v0->screenPosition[2], v1->screenPosition[2], v2->screenPosition[2], fltdx31, fltdx12, fltdy12, fltdy31); InitSlope(&ZSlope, v0->screenPosition[2], v1->screenPosition[2], v2->screenPosition[2], fltdx31, fltdx12, fltdy12, fltdy31);