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PixelShaderGen: Use new multiplier everywhere and directly cast to int instead or rounding.

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This commit is contained in:
Jules Blok 2015-05-07 23:49:09 +02:00
parent a224c604a3
commit 5dbb43ae1d
1 changed files with 4 additions and 4 deletions
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8
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -563,12 +563,12 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
// The performance impact of this additional calculation doesn't matter, but it prevents // The performance impact of this additional calculation doesn't matter, but it prevents
// the host GPU driver from performing any early depth test optimizations. // the host GPU driver from performing any early depth test optimizations.
if (g_ActiveConfig.bFastDepthCalc) if (g_ActiveConfig.bFastDepthCalc)
out.Write("\tint zCoord = iround(rawpos.z * float(0xFFFFFF));\n"); out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n");
else else
{ {
out.SetConstantsUsed(C_ZBIAS+1, C_ZBIAS+1); out.SetConstantsUsed(C_ZBIAS+1, C_ZBIAS+1);
// the screen space depth value = far z + (clip z / clip w) * z range // the screen space depth value = far z + (clip z / clip w) * z range
out.Write("\tint zCoord = " I_ZBIAS"[1].x + iround((clipPos.z / clipPos.w) * float(" I_ZBIAS"[1].y));\n"); out.Write("\tint zCoord = " I_ZBIAS"[1].x + int((clipPos.z / clipPos.w) * float(" I_ZBIAS"[1].y));\n");
} }
// depth texture can safely be ignored if the result won't be written to the depth buffer (early_ztest) and isn't used for fog either // depth texture can safely be ignored if the result won't be written to the depth buffer (early_ztest) and isn't used for fog either
@ -1169,13 +1169,13 @@ static inline void WriteFog(T& out, pixel_shader_uid_data* uid_data)
// TODO: Verify that we want to drop lower bits here! (currently taken over from software renderer) // TODO: Verify that we want to drop lower bits here! (currently taken over from software renderer)
// Maybe we want to use "ze = (A << B_SHF)/((B << B_SHF) - Zs)" instead? // Maybe we want to use "ze = (A << B_SHF)/((B << B_SHF) - Zs)" instead?
// That's equivalent, but keeps the lower bits of Zs. // That's equivalent, but keeps the lower bits of Zs.
out.Write("\tfloat ze = (" I_FOGF"[1].x * 16777215.0) / float(" I_FOGI".y - (zCoord >> " I_FOGI".w));\n"); out.Write("\tfloat ze = (" I_FOGF"[1].x * 16777216.0) / float(" I_FOGI".y - (zCoord >> " I_FOGI".w));\n");
} }
else else
{ {
// orthographic // orthographic
// ze = a*Zs (here, no B_SHF) // ze = a*Zs (here, no B_SHF)
out.Write("\tfloat ze = " I_FOGF"[1].x * float(zCoord) / 16777215.0;\n"); out.Write("\tfloat ze = " I_FOGF"[1].x * float(zCoord) / 16777216.0;\n");
} }
// x_adjust = sqrt((x-center)^2 + k^2)/k // x_adjust = sqrt((x-center)^2 + k^2)/k