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Software: Disable clipping based on xfmem

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This fixes https://bugs.dolphin-emu.org/issues/12562, and is also needed for a hardware test of mine.
This commit is contained in:
Pokechu22 2021-11-18 16:52:43 -08:00
parent 925ceab82f
commit 8745d84949
1 changed files with 18 additions and 1 deletions
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19
Source/Core/VideoBackends/Software/Clipper.cpp
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@ -345,7 +345,24 @@ void ProcessTriangle(OutputVertexData* v0, OutputVertexData* v1, OutputVertexDat
Vertices[2] = v2;
}
ClipTriangle(indices, &numIndices);
// TODO: behavior when disable_clipping_detection is set doesn't quite match actual hardware;
// there does still seem to be a maximum size after which things are clipped. Also, currently
// when clipping is enabled triangles are clipped to exactly the viewport, but on hardware there
// is a guardband (and with certain scissor configurations, things can show up in it)
// Mario Party 8 in widescreen breaks without this: https://bugs.dolphin-emu.org/issues/12769
bool skip_clipping = false;
if (xfmem.clipDisable.disable_clipping_detection)
{
// If any w coordinate is negative, then the perspective divide will flip coordinates, breaking
// various assumptions (including backface). So, we still need to do clipping in that case.
// This isn't the actual condition hardware uses.
if (Vertices[0]->projectedPosition.w >= 0 && Vertices[1]->projectedPosition.w >= 0 &&
Vertices[2]->projectedPosition.w >= 0)
skip_clipping = true;
}
if (!skip_clipping)
ClipTriangle(indices, &numIndices);
for (int i = 0; i + 3 <= numIndices; i += 3)
{