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GPU/HW: Fix incorrect texel offset when upscaling

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Fixes incorrectly coloured triangles in Tomb Raider.
This commit is contained in:
Connor McLaughlin 2020-08-12 02:27:03 +10:00
parent c7af998d08
commit 17a1719450
1 changed files with 4 additions and 1 deletions
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5
src/core/gpu_hw.cpp
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@ -182,8 +182,11 @@ void GPU_HW::HandleFlippedQuadTextureCoordinates(BatchVertex* vertices)
const s32 texArea = (vertices[1].u - vertices[0].u) * (vertices[2].v - vertices[0].v) -
(vertices[2].u - vertices[0].u) * (vertices[1].v - vertices[0].v);
// Leverage PGXP to further avoid 3D polygons that just happen to align this way after projection
const bool is_3d = (vertices[0].w != vertices[1].w || vertices[0].w != vertices[2].w);
// Shouldn't matter as degenerate primitives will be culled anyways.
if (area == 0.0f && texArea == 0)
if (area == 0.0f || texArea == 0 || is_3d)
return;
// Use floats here as it'll be faster than integer divides.