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Diffstat (limited to 'Source/Core/VideoBackends/Software/Tev.cpp')
| -rw-r--r-- | Source/Core/VideoBackends/Software/Tev.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Source/Core/VideoBackends/Software/Tev.cpp b/Source/Core/VideoBackends/Software/Tev.cpp index ee0a789ec6..6905920405 100644 --- a/Source/Core/VideoBackends/Software/Tev.cpp +++ b/Source/Core/VideoBackends/Software/Tev.cpp @@ -714,6 +714,19 @@ void Tev::Draw() if (!TevAlphaTest(output[ALP_C])) return; + // Hardware testing indicates that an alpha of 1 can pass an alpha test, + // but doesn't do anything in blending + // This situation is important for Mario Kart Wii's menus (they will render incorrectly if the + // alpha test for the FMV in the background fails, since they depend on depth for drawing a yellow + // border) and Fortune Street's gameplay (where a rectangle with an alpha value of 1 is drawn over + // the center of the screen several times, but those rectangles shouldn't be visible). + // Blending seems to result in no changes to the output with an alpha of 1, even if the input + // color is white. + // TODO: Investigate this further: we might be handling blending incorrectly in general (though + // there might not be any good way of changing blending behavior) + if (output[ALP_C] == 1) + output[ALP_C] = 0; + // z texture if (bpmem.ztex2.op != ZTexOp::Disabled) { |