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softgpu: Fix some stencil testing related bugs.

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Tony Wasserka 2013-07-27 14:51:39 +02:00 • committed by neobrain
parent 67f95d38e5
commit d0c05b78d6
1 changed files with 19 additions and 6 deletions
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25
GPU/Software/Rasterizer.cpp
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@ -261,14 +261,25 @@ static inline void SetPixelDepth(int x, int y, u16 value)
static inline u8 GetPixelStencil(int x, int y)
{
// TODO: Fix for other pixel formats ?
return (((*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()]) & 0x80000000) != 0) ? 0xFF : 0;
if (gstate.FrameBufFormat() == GE_FORMAT_565) {
// TODO: Should we return 0xFF instead here?
return 0;
} else if (gstate.FrameBufFormat() != GE_FORMAT_8888) {
return (((*(u16*)&fb[2*x + 2*y*gstate.FrameBufStride()]) & 0x8000) != 0) ? 0xFF : 0;
} else {
return (((*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()]) & 0x80000000) != 0) ? 0xFF : 0;
}
}
static inline void SetPixelStencil(int x, int y, u8 value)
{
// TODO: Fix for other pixel formats ?
*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()] = (*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()] & ~0x80000000) | ((value&0x80)<<24);
if (gstate.FrameBufFormat() == GE_FORMAT_565) {
// Do nothing
} else if (gstate.FrameBufFormat() != GE_FORMAT_8888) {
*(u16*)&fb[2*x + 2*y*gstate.FrameBufStride()] = (*(u16*)&fb[2*x + 2*y*gstate.FrameBufStride()] & ~0x8000) | ((value&0x80)<<8);
} else {
*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()] = (*(u32*)&fb[4*x + 4*y*gstate.FrameBufStride()] & ~0x80000000) | ((value&0x80)<<24);
}
}
static inline bool DepthTestPassed(int x, int y, u16 z)
@ -374,12 +385,14 @@ static inline void ApplyStencilOp(int op, int x, int y)
case GE_STENCILOP_INCR:
// TODO: Does this overflow?
SetPixelStencil(x, y, old_stencil+1);
if (old_stencil != 0xFF)
SetPixelStencil(x, y, old_stencil+1);
break;
case GE_STENCILOP_DECR:
// TODO: Does this underflow?
SetPixelStencil(x, y, old_stencil-1);
if (old_stencil != 0)
SetPixelStencil(x, y, old_stencil-1);
break;
}
}