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Partially revert revision d511b50612. 

Slightly slows down emulation, but deobfuscates the pixel shader gen greatly...
This commit is contained in:
NeoBrainX 2011-08-31 16:09:54 +02:00
parent 8a17e15943
commit 08e06b2293
1 changed files with 12 additions and 90 deletions
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102
Source/Core/VideoCommon/Src/PixelShaderGen.cpp
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@ -353,15 +353,6 @@ static char swapModeTable[4][5];
static char text[16384];
static bool DepthTextureEnable;
struct RegisterState
{
bool ColorNeedOverflowControl;
bool AlphaNeedOverflowControl;
bool AuxStored;
};
static RegisterState RegisterStates[4];
static void BuildSwapModeTable()
{
for (int i = 0; i < 4; i++)
@ -582,16 +573,6 @@ const char *GeneratePixelShaderCode(DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType
}
}
RegisterStates[0].AlphaNeedOverflowControl = false;
RegisterStates[0].ColorNeedOverflowControl = false;
RegisterStates[0].AuxStored = false;
for(int i = 1; i < 4; i++)
{
RegisterStates[i].AlphaNeedOverflowControl = true;
RegisterStates[i].ColorNeedOverflowControl = true;
RegisterStates[i].AuxStored = false;
}
for (int i = 0; i < numStages; i++)
WriteStage(p, i, ApiType); //build the equation for this stage
@ -599,22 +580,11 @@ const char *GeneratePixelShaderCode(DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType
{
// The results of the last texenv stage are put onto the screen,
// regardless of the used destination register
if(bpmem.combiners[numStages - 1].colorC.dest != 0)
{
bool retrieveFromAuxRegister = !RegisterStates[bpmem.combiners[numStages - 1].colorC.dest].ColorNeedOverflowControl && RegisterStates[bpmem.combiners[numStages - 1].colorC.dest].AuxStored;
WRITE(p, "prev.rgb = %s%s;\n", retrieveFromAuxRegister ? "c" : "" , tevCOutputTable[bpmem.combiners[numStages - 1].colorC.dest]);
RegisterStates[0].ColorNeedOverflowControl = RegisterStates[bpmem.combiners[numStages - 1].colorC.dest].ColorNeedOverflowControl;
}
if(bpmem.combiners[numStages - 1].alphaC.dest != 0)
{
bool retrieveFromAuxRegister = !RegisterStates[bpmem.combiners[numStages - 1].alphaC.dest].AlphaNeedOverflowControl && RegisterStates[bpmem.combiners[numStages - 1].alphaC.dest].AuxStored;
WRITE(p, "prev.a = %s%s;\n", retrieveFromAuxRegister ? "c" : "" , tevAOutputTable[bpmem.combiners[numStages - 1].alphaC.dest]);
RegisterStates[0].AlphaNeedOverflowControl = RegisterStates[bpmem.combiners[numStages - 1].alphaC.dest].AlphaNeedOverflowControl;
}
}
// emulation of unisgned 8 overflow when casting if needed
if(RegisterStates[0].AlphaNeedOverflowControl || RegisterStates[0].ColorNeedOverflowControl)
WRITE(p, "prev = frac(prev * (255.0f/256.0f)) * (256.0f/255.0f);\n");
WRITE(p, "prev.rgb = %s;\n",tevCOutputTable[bpmem.combiners[numStages-1].colorC.dest]);
WRITE(p, "prev.a = %s;\n",tevAOutputTable[bpmem.combiners[numStages-1].alphaC.dest]);
}
// emulation of unsigned 8 overflow when casting
WRITE(p, "prev = frac(4.0f + prev * (255.0f/256.0f)) * (256.0f/255.0f);\n");
// TODO: Why are we doing a second alpha pretest here?
if (!WriteAlphaTest(p, ApiType, dstAlphaMode))
@ -864,76 +834,30 @@ static void WriteStage(char *&p, int n, API_TYPE ApiType)
|| cc.b == TEVCOLORARG_CPREV || cc.b == TEVCOLORARG_APREV
|| cc.c == TEVCOLORARG_CPREV || cc.c == TEVCOLORARG_APREV
|| ac.a == TEVALPHAARG_APREV || ac.b == TEVALPHAARG_APREV || ac.c == TEVALPHAARG_APREV)
{
if(RegisterStates[0].AlphaNeedOverflowControl || RegisterStates[0].ColorNeedOverflowControl)
{
WRITE(p, "cprev = frac(prev * (255.0f/256.0f)) * (256.0f/255.0f);\n");
RegisterStates[0].AlphaNeedOverflowControl = false;
RegisterStates[0].ColorNeedOverflowControl = false;
}
else
{
WRITE(p, "cprev = prev;\n");
}
RegisterStates[0].AuxStored = true;
}
WRITE(p, "cprev = frac(prev * (255.0f/256.0f)) * (256.0f/255.0f);\n");
if(cc.a == TEVCOLORARG_C0 || cc.a == TEVCOLORARG_A0
|| cc.b == TEVCOLORARG_C0 || cc.b == TEVCOLORARG_A0
|| cc.c == TEVCOLORARG_C0 || cc.c == TEVCOLORARG_A0
|| ac.a == TEVALPHAARG_A0 || ac.b == TEVALPHAARG_A0 || ac.c == TEVALPHAARG_A0)
{
if(RegisterStates[1].AlphaNeedOverflowControl || RegisterStates[1].ColorNeedOverflowControl)
{
WRITE(p, "cc0 = frac(c0 * (255.0f/256.0f)) * (256.0f/255.0f);\n");
RegisterStates[1].AlphaNeedOverflowControl = false;
RegisterStates[1].ColorNeedOverflowControl = false;
}
else
{
WRITE(p, "cc0 = c0;\n");
}
RegisterStates[1].AuxStored = true;
}
WRITE(p, "cc0 = frac(c0 * (255.0f/256.0f)) * (256.0f/255.0f);\n");
if(cc.a == TEVCOLORARG_C1 || cc.a == TEVCOLORARG_A1
|| cc.b == TEVCOLORARG_C1 || cc.b == TEVCOLORARG_A1
|| cc.c == TEVCOLORARG_C1 || cc.c == TEVCOLORARG_A1
|| ac.a == TEVALPHAARG_A1 || ac.b == TEVALPHAARG_A1 || ac.c == TEVALPHAARG_A1)
{
if(RegisterStates[2].AlphaNeedOverflowControl || RegisterStates[2].ColorNeedOverflowControl)
{
WRITE(p, "cc1 = frac(c1 * (255.0f/256.0f)) * (256.0f/255.0f);\n");
RegisterStates[2].AlphaNeedOverflowControl = false;
RegisterStates[2].ColorNeedOverflowControl = false;
}
else
{
WRITE(p, "cc1 = c1;\n");
}
RegisterStates[2].AuxStored = true;
}
WRITE(p, "cc1 = frac(c1 * (255.0f/256.0f)) * (256.0f/255.0f);\n");
if(cc.a == TEVCOLORARG_C2 || cc.a == TEVCOLORARG_A2
|| cc.b == TEVCOLORARG_C2 || cc.b == TEVCOLORARG_A2
|| cc.c == TEVCOLORARG_C2 || cc.c == TEVCOLORARG_A2
|| ac.a == TEVALPHAARG_A2 || ac.b == TEVALPHAARG_A2 || ac.c == TEVALPHAARG_A2)
{
if(RegisterStates[3].AlphaNeedOverflowControl || RegisterStates[3].ColorNeedOverflowControl)
{
WRITE(p, "cc2 = frac(c2 * (255.0f/256.0f)) * (256.0f/255.0f);\n");
RegisterStates[3].AlphaNeedOverflowControl = false;
RegisterStates[3].ColorNeedOverflowControl = false;
}
else
{
WRITE(p, "cc2 = c2;\n");
}
RegisterStates[3].AuxStored = true;
}
RegisterStates[cc.dest].ColorNeedOverflowControl = (cc.clamp == 0);
RegisterStates[cc.dest].AuxStored = false;
if (cc.clamp)
WRITE(p, "%s = saturate(", tevCOutputTable[cc.dest]);
else
@ -980,8 +904,6 @@ static void WriteStage(char *&p, int n, API_TYPE ApiType)
WRITE(p, ")");
WRITE(p,";\n");
RegisterStates[ac.dest].AlphaNeedOverflowControl = (ac.clamp == 0);
RegisterStates[ac.dest].AuxStored = false;
// combine the alpha channel
if (ac.clamp)
WRITE(p, "%s = saturate(", tevAOutputTable[ac.dest]);