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Stop quads with partially bad W components from getting through.

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Should fix stretched textures in games like Spyro.
This commit is contained in:
iCatButler 2016-10-01 19:34:05 +01:00
parent 61876ee5bd
commit 5c73e07129
2 changed files with 8 additions and 1 deletions
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1
mednafen/psx/gpu.h
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@ -258,6 +258,7 @@ class PS_GPU
tri_vertex InQuad_F3Vertices[3];
uint32 InQuad_clut;
bool InQuad_invalidW;
line_point InPLine_PrevPoint;

8
mednafen/psx/gpu_polygon.cpp
View File

@ -443,6 +443,7 @@ INLINE void PS_GPU::Command_DrawPolygon(const uint32_t *cb)
{
memcpy(&vertices[0], &InQuad_F3Vertices[1], 2 * sizeof(tri_vertex));
clut = InQuad_clut;
invalidW = InQuad_invalidW;
sv = 2;
}
}
@ -510,7 +511,7 @@ INLINE void PS_GPU::Command_DrawPolygon(const uint32_t *cb)
// iCB: If any vertices lack w components then set all to 1
if (invalidW)
for (unsigned v = sv; v < 3; v++)
for (unsigned v = 0; v < 3; v++)
vertices[v].precise[2] = 1.f;
@ -519,6 +520,10 @@ INLINE void PS_GPU::Command_DrawPolygon(const uint32_t *cb)
if(InCmd == INCMD_QUAD)
{
InCmd = INCMD_NONE;
// default first vertex of quad to 1 if any of the vertices are 1 (even if the first triangle was okay)
if (invalidW)
InQuad_F3Vertices[0].precise[2] = 1.f;
}
else
{
@ -526,6 +531,7 @@ INLINE void PS_GPU::Command_DrawPolygon(const uint32_t *cb)
InCmd_CC = cb0 >> 24;
memcpy(&InQuad_F3Vertices[0], &vertices[0], sizeof(tri_vertex) * 3);
InQuad_clut = clut;
InQuad_invalidW = invalidW;
}
}