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dolphin/Source/Core/VideoCommon/Src/PixelShaderGen.cpp

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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include <stdio.h>
#include <cmath>
#include <assert.h>
#include <locale.h>
#include "Profiler.h"
#include "PixelShaderGen.h"
#include "XFMemory.h" // for texture projection mode
#include "BPMemory.h"
PIXELSHADERUID last_pixel_shader_uid;
// Mash together all the inputs that contribute to the code of a generated pixel shader into
// a unique identifier, basically containing all the bits. Yup, it's a lot ....
// It would likely be a lot more efficient to build this incrementally as the attributes
// are set...
void GetPixelShaderId(PIXELSHADERUID *uid, u32 texturemask, u32 dstAlphaEnable)
{
u32 projtexcoords = 0;
for (u32 i = 0; i < (u32)bpmem.genMode.numtevstages + 1; i++)
{
if (bpmem.tevorders[i/2].getEnable(i & 1))
{
int texcoord = bpmem.tevorders[i / 2].getTexCoord(i & 1);
if (xfregs.texcoords[texcoord].texmtxinfo.projection)
projtexcoords |= 1 << texcoord;
}
}
uid->values[0] = (u32)bpmem.genMode.numtevstages |
((u32)bpmem.genMode.numindstages << 4) |
((u32)bpmem.genMode.numtexgens << 7) |
((u32)dstAlphaEnable << 11) |
((u32)((bpmem.alphaFunc.hex >> 16) & 0xff) << 12) |
(projtexcoords << 20) |
((u32)bpmem.ztex2.op << 28);
uid->values[0] = (uid->values[0] & ~0x0ff00000) | (projtexcoords << 20);
// swap table
for (int i = 0; i < 8; i += 2)
((u8*)&uid->values[1])[i / 2] = (bpmem.tevksel[i].hex & 0xf) | ((bpmem.tevksel[i + 1].hex & 0xf) << 4);
uid->values[2] = texturemask;
u32 enableZTexture = (!bpmem.zcontrol.zcomploc && bpmem.zmode.testenable && bpmem.zmode.updateenable)?1:0;
uid->values[3] = (u32)bpmem.fog.c_proj_fsel.fsel |
((u32)bpmem.fog.c_proj_fsel.proj << 3) |
((u32)enableZTexture << 4);
int hdr = 4;
u32 *pcurvalue = &uid->values[hdr];
for (u32 i = 0; i < (u32)bpmem.genMode.numtevstages + 1; ++i)
{
TevStageCombiner::ColorCombiner &cc = bpmem.combiners[i].colorC;
TevStageCombiner::AlphaCombiner &ac = bpmem.combiners[i].alphaC;
u32 val0 = cc.hex & 0xffffff;
u32 val1 = ac.hex & 0xffffff;
val0 |= bpmem.tevksel[i / 2].getKC(i & 1) << 24;
val1 |= bpmem.tevksel[i / 2].getKA(i & 1) << 24;
pcurvalue[0] = val0;
pcurvalue[1] = val1;
pcurvalue += 2;
}
for (u32 i = 0; i < ((u32)bpmem.genMode.numtevstages+1) / 2; ++i)
{
u32 val0, val1;
if (bpmem.tevorders[i].hex & 0x40)
val0 = bpmem.tevorders[i].hex & 0x3ff;
else
val0 = bpmem.tevorders[i].hex & 0x380;
if (bpmem.tevorders[i].hex & 0x40000)
val1 = (bpmem.tevorders[i].hex & 0x3ff000) >> 12;
else
val1 = (bpmem.tevorders[i].hex & 0x380000) >> 12;
switch (i % 3) {
case 0: pcurvalue[0] = val0|(val1<<10); break;
case 1: pcurvalue[0] |= val0<<20; pcurvalue[1] = val1; pcurvalue++; break;
case 2: pcurvalue[1] |= (val0<<10)|(val1<<20); pcurvalue++; break;
default: PanicAlert("Unknown case for Tev Stages / 2: %08x", (i % 3));
}
}
if ((bpmem.genMode.numtevstages + 1) & 1) { // odd
u32 val0;
if (bpmem.tevorders[bpmem.genMode.numtevstages/2].hex & 0x40)
val0 = bpmem.tevorders[bpmem.genMode.numtevstages/2].hex & 0x3ff;
else
val0 = bpmem.tevorders[bpmem.genMode.numtevstages/2].hex & 0x380;
switch (bpmem.genMode.numtevstages % 3)
{
case 0: pcurvalue[0] = val0; break;
case 1: pcurvalue[0] |= val0 << 20; break;
case 2: pcurvalue[1] |= val0 << 10; pcurvalue++; break;
default: PanicAlert("Unknown case for Tev Stages: %08x", bpmem.genMode.numtevstages % 3);
}
}
if ((bpmem.genMode.numtevstages % 3) != 2)
++pcurvalue;
uid->tevstages = (u32)(pcurvalue - &uid->values[0] - hdr);
for (u32 i = 0; i < bpmem.genMode.numindstages; ++i)
{
u32 val = bpmem.tevind[i].hex & 0x1fffff; // 21 bits
switch (i % 3)
{
case 0: pcurvalue[0] = val; break;
case 1: pcurvalue[0] |= val << 21; pcurvalue[1] = val >> 11; ++pcurvalue; break;
case 2: pcurvalue[0] |= val << 10; ++pcurvalue; break;
default: PanicAlert("Unknown case for Ind Stages: %08x", (i % 3));
}
}
// yeah, well ....
uid->indstages = (u32)(pcurvalue - &uid->values[0] - (hdr - 1) - uid->tevstages);
}
// old tev->pixelshader notes
//
// color for this stage (alpha, color) is given by bpmem.tevorders[0].colorchan0
// konstant for this stage (alpha, color) is given by bpmem.tevksel
// inputs are given by bpmem.combiners[0].colorC.a/b/c/d << could be current chan color
// according to GXTevColorArg table above
// output is given by .outreg
// tevtemp is set according to swapmodetables and
static void WriteStage(char *&p, int n, u32 texture_mask, API_TYPE ApiType);
static void SampleTexture(char *&p, const char *destination, const char *texcoords, const char *texswap, int texmap, u32 texture_mask, API_TYPE ApiType);
// static void WriteAlphaCompare(char *&p, int num, int comp);
static bool WriteAlphaTest(char *&p, API_TYPE ApiType);
static void WriteFog(char *&p);
static const char *tevKSelTableC[] = // KCSEL
{
"1.0f,1.0f,1.0f", // 1 = 0x00
"0.875f,0.875f,0.875f", // 7_8 = 0x01
"0.75f,0.75f,0.75f", // 3_4 = 0x02
"0.625f,0.625f,0.625f", // 5_8 = 0x03
"0.5f,0.5f,0.5f", // 1_2 = 0x04
"0.375f,0.375f,0.375f", // 3_8 = 0x05
"0.25f,0.25f,0.25f", // 1_4 = 0x06
"0.125f,0.125f,0.125f", // 1_8 = 0x07
"ERROR", // 0x08
"ERROR", // 0x09
"ERROR", // 0x0a
"ERROR", // 0x0b
I_KCOLORS"[0].rgb", // K0 = 0x0C
I_KCOLORS"[1].rgb", // K1 = 0x0D
I_KCOLORS"[2].rgb", // K2 = 0x0E
I_KCOLORS"[3].rgb", // K3 = 0x0F
I_KCOLORS"[0].rrr", // K0_R = 0x10
I_KCOLORS"[1].rrr", // K1_R = 0x11
I_KCOLORS"[2].rrr", // K2_R = 0x12
I_KCOLORS"[3].rrr", // K3_R = 0x13
I_KCOLORS"[0].ggg", // K0_G = 0x14
I_KCOLORS"[1].ggg", // K1_G = 0x15
I_KCOLORS"[2].ggg", // K2_G = 0x16
I_KCOLORS"[3].ggg", // K3_G = 0x17
I_KCOLORS"[0].bbb", // K0_B = 0x18
I_KCOLORS"[1].bbb", // K1_B = 0x19
I_KCOLORS"[2].bbb", // K2_B = 0x1A
I_KCOLORS"[3].bbb", // K3_B = 0x1B
I_KCOLORS"[0].aaa", // K0_A = 0x1C
I_KCOLORS"[1].aaa", // K1_A = 0x1D
I_KCOLORS"[2].aaa", // K2_A = 0x1E
I_KCOLORS"[3].aaa", // K3_A = 0x1F
};
static const char *tevKSelTableA[] = // KASEL
{
"1.0f", // 1 = 0x00
"0.875f",// 7_8 = 0x01
"0.75f", // 3_4 = 0x02
"0.625f",// 5_8 = 0x03
"0.5f", // 1_2 = 0x04
"0.375f",// 3_8 = 0x05
"0.25f", // 1_4 = 0x06
"0.125f",// 1_8 = 0x07
"ERROR", // 0x08
"ERROR", // 0x09
"ERROR", // 0x0a
"ERROR", // 0x0b
"ERROR", // 0x0c
"ERROR", // 0x0d
"ERROR", // 0x0e
"ERROR", // 0x0f
I_KCOLORS"[0].r", // K0_R = 0x10
I_KCOLORS"[1].r", // K1_R = 0x11
I_KCOLORS"[2].r", // K2_R = 0x12
I_KCOLORS"[3].r", // K3_R = 0x13
I_KCOLORS"[0].g", // K0_G = 0x14
I_KCOLORS"[1].g", // K1_G = 0x15
I_KCOLORS"[2].g", // K2_G = 0x16
I_KCOLORS"[3].g", // K3_G = 0x17
I_KCOLORS"[0].b", // K0_B = 0x18
I_KCOLORS"[1].b", // K1_B = 0x19
I_KCOLORS"[2].b", // K2_B = 0x1A
I_KCOLORS"[3].b", // K3_B = 0x1B
I_KCOLORS"[0].a", // K0_A = 0x1C
I_KCOLORS"[1].a", // K1_A = 0x1D
I_KCOLORS"[2].a", // K2_A = 0x1E
I_KCOLORS"[3].a", // K3_A = 0x1F
};
static const char *tevScaleTable[] = // CS
{
"1.0f", // SCALE_1
"2.0f", // SCALE_2
"4.0f", // SCALE_4
"0.5f", // DIVIDE_2
};
static const char *tevBiasTable[] = // TB
{
"", // ZERO,
"+0.5f", // ADDHALF,
"-0.5f", // SUBHALF,
"",
};
static const char *tevOpTable[] = { // TEV
"+", // TEVOP_ADD = 0,
"-", // TEVOP_SUB = 1,
};
static const char *tevCInputTable[] = // CC
{
"(prev.rgb)", // CPREV,
"(prev.aaa)", // APREV,
"(c0.rgb)", // C0,
"(c0.aaa)", // A0,
"(c1.rgb)", // C1,
"(c1.aaa)", // A1,
"(c2.rgb)", // C2,
"(c2.aaa)", // A2,
"(textemp.rgb)", // TEXC,
"(textemp.aaa)", // TEXA,
"(rastemp.rgb)", // RASC,
"(rastemp.aaa)", // RASA,
"float3(1.0f, 1.0f, 1.0f)", // ONE
"float3(0.5f, 0.5f, 0.5f)", // HALF
"(konsttemp.rgb)", //"konsttemp.rgb", // KONST
"float3(0.0f, 0.0f, 0.0f)", // ZERO
///aded extra values to map clamped values
"(cprev.rgb)", // CPREV,
"(cprev.aaa)", // APREV,
"(cc0.rgb)", // C0,
"(cc0.aaa)", // A0,
"(cc1.rgb)", // C1,
"(cc1.aaa)", // A1,
"(cc2.rgb)", // C2,
"(cc2.aaa)", // A2,
"(textemp.rgb)", // TEXC,
"(textemp.aaa)", // TEXA,
"(rastemp.rgb)", // RASC,
"(rastemp.aaa)", // RASA,
"float3(1.0f, 1.0f, 1.0f)", // ONE
"float3(0.5f, 0.5f, 0.5f)", // HALF
"(konsttemp.rgb)", //"konsttemp.rgb", // KONST
"float3(0.0f, 0.0f, 0.0f)", // ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR"
};
static const char *tevAInputTable[] = // CA
{
"prev", // APREV,
"c0", // A0,
"c1", // A1,
"c2", // A2,
"textemp", // TEXA,
"rastemp", // RASA,
"konsttemp", // KONST, (hw1 had quarter)
"float4(0.0f, 0.0f, 0.0f, 0.0f)", // ZERO
///aded extra values to map clamped values
"cprev", // APREV,
"cc0", // A0,
"cc1", // A1,
"cc2", // A2,
"textemp", // TEXA,
"rastemp", // RASA,
"konsttemp", // KONST, (hw1 had quarter)
"float4(0.0f, 0.0f, 0.0f, 0.0f)", // ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
};
static const char *tevRasTable[] =
{
"colors_0",
"colors_1",
"ERROR", //2
"ERROR", //3
"ERROR", //4
"alphabump", // use bump alpha
"(alphabump*(255.0f/248.0f))", //normalized
"float4(0.0f, 0.0f, 0.0f, 0.0f)", // zero
};
static const char *alphaRef[2] =
{
I_ALPHA"[0].r",
I_ALPHA"[0].g"
};
//static const char *tevTexFunc[] = { "tex2D", "texRECT" };
static const char *tevCOutputTable[] = { "prev.rgb", "c0.rgb", "c1.rgb", "c2.rgb" };
static const char *tevAOutputTable[] = { "prev.a", "c0.a", "c1.a", "c2.a" };
static const char *tevIndAlphaSel[] = {"", "x", "y", "z"};
//static const char *tevIndAlphaScale[] = {"", "*32", "*16", "*8"};
static const char *tevIndAlphaScale[] = {"*(248.0f/255.0f)", "*(224.0f/255.0f)", "*(240.0f/255.0f)", "*(248.0f/255.0f)"};
static const char *tevIndBiasField[] = {"", "x", "y", "xy", "z", "xz", "yz", "xyz"}; // indexed by bias
static const char *tevIndBiasAdd[] = {"-128.0f", "1.0f", "1.0f", "1.0f" }; // indexed by fmt
static const char *tevIndWrapStart[] = {"0.0f", "256.0f", "128.0f", "64.0f", "32.0f", "16.0f", "0.001f" };
static const char *tevIndFmtScale[] = {"255.0f", "31.0f", "15.0f", "7.0f" };
#define WRITE p+=sprintf
static const char *swapColors = "rgba";
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++)
{
swapModeTable[i][0] = swapColors[bpmem.tevksel[i*2].swap1];
swapModeTable[i][1] = swapColors[bpmem.tevksel[i*2].swap2];
swapModeTable[i][2] = swapColors[bpmem.tevksel[i*2+1].swap1];
swapModeTable[i][3] = swapColors[bpmem.tevksel[i*2+1].swap2];
swapModeTable[i][4] = 0;
}
}
const char *GeneratePixelShaderCode(u32 texture_mask, bool dstAlphaEnable, API_TYPE ApiType)
{
setlocale(LC_NUMERIC, "C"); // Reset locale for compilation
text[sizeof(text) - 1] = 0x7C; // canary
DVSTARTPROFILE();
BuildSwapModeTable();
int numStages = bpmem.genMode.numtevstages + 1;
int numTexgen = bpmem.genMode.numtexgens;
char *p = text;
WRITE(p, "//Pixel Shader for TEV stages\n");
WRITE(p, "//%i TEV stages, %i texgens, %i IND stages\n",
numStages, numTexgen, bpmem.genMode.numindstages);
int nIndirectStagesUsed = 0;
if (bpmem.genMode.numindstages > 0)
{
for (int i = 0; i < numStages; ++i)
{
if (bpmem.tevind[i].IsActive() && bpmem.tevind[i].bt < bpmem.genMode.numindstages)
nIndirectStagesUsed |= 1 << bpmem.tevind[i].bt;
}
}
DepthTextureEnable = bpmem.ztex2.op != ZTEXTURE_DISABLE && !bpmem.zcontrol.zcomploc && bpmem.zmode.testenable && bpmem.zmode.updateenable;
// Declare samplers
if (texture_mask && ApiType == API_OPENGL)
{
WRITE(p, "uniform samplerRECT ");
bool bfirst = true;
for (int i = 0; i < 8; ++i)
{
if (texture_mask & (1<<i))
{
WRITE(p, "%s samp%d : register(s%d)", bfirst?"":",", i, i);
bfirst = false;
}
}
WRITE(p, ";\n");
}
if (texture_mask != 0xff)
{
if(ApiType != API_D3D11)
{
WRITE(p, "uniform sampler2D ");
}
else
{
WRITE(p, "sampler ");
}
bool bfirst = true;
for (int i = 0; i < 8; ++i)
{
if (!(texture_mask & (1<<i))) {
WRITE(p, "%s samp%d : register(s%d)", bfirst?"":",", i, i);
bfirst = false;
}
}
WRITE(p, ";\n");
if(ApiType == API_D3D11)
{
WRITE(p, "Texture2D ");
bfirst = true;
for (int i = 0; i < 8; ++i)
{
if (!(texture_mask & (1<<i)))
{
WRITE(p, "%s Tex%d : register(t%d)", bfirst?"":",", i, i);
bfirst = false;
}
}
WRITE(p, ";\n");
}
}
WRITE(p, "\n");
WRITE(p, "uniform float4 "I_COLORS"[4] : register(c%d);\n", C_COLORS);
WRITE(p, "uniform float4 "I_KCOLORS"[4] : register(c%d);\n", C_KCOLORS);
WRITE(p, "uniform float4 "I_ALPHA"[1] : register(c%d);\n", C_ALPHA);
WRITE(p, "uniform float4 "I_TEXDIMS"[8] : register(c%d);\n", C_TEXDIMS);
WRITE(p, "uniform float4 "I_ZBIAS"[2] : register(c%d);\n", C_ZBIAS);
WRITE(p, "uniform float4 "I_INDTEXSCALE"[2] : register(c%d);\n", C_INDTEXSCALE);
WRITE(p, "uniform float4 "I_INDTEXMTX"[6] : register(c%d);\n", C_INDTEXMTX);
WRITE(p, "uniform float4 "I_FOG"[2] : register(c%d);\n", C_FOG);
WRITE(p, "void main(\n");
if(ApiType != API_D3D11)
WRITE(p, " out float4 ocol0 : COLOR0,%s\n in float4 rawpos : POSITION,\n",DepthTextureEnable ? "\n out float depth : DEPTH," : "");
else
WRITE(p, " out float4 ocol0 : SV_Target,%s\n in float4 rawpos : SV_Position,\n",DepthTextureEnable ? "\n out float depth : SV_Depth," : "");
WRITE(p, " in float4 colors_0 : COLOR0,\n");
WRITE(p, " in float4 colors_1 : COLOR1");
// compute window position if needed because binding semantic WPOS is not widely supported
if (numTexgen < 7)
{
for (int i = 0; i < numTexgen; ++i)
WRITE(p, ",\n in float3 uv%d : TEXCOORD%d", i, i);
WRITE(p, ",\n in float4 clipPos : TEXCOORD%d", numTexgen);
}
else
{
// wpos is in w of first 4 texcoords
for (int i = 0; i < numTexgen; ++i)
WRITE(p, ",\n in float%d uv%d : TEXCOORD%d", i<4?4:3, i, i);
}
WRITE(p, " ) {\n");
char* pmainstart = p;
WRITE(p, " float4 c0 = "I_COLORS"[1], c1 = "I_COLORS"[2], c2 = "I_COLORS"[3], prev = float4(0.0f, 0.0f, 0.0f, 0.0f), textemp = float4(0.0f, 0.0f, 0.0f, 0.0f), rastemp = float4(0.0f, 0.0f, 0.0f, 0.0f), konsttemp = float4(0.0f, 0.0f, 0.0f, 0.0f);\n"
" float3 comp16 = float3(1.0f, 255.0f, 0.0f), comp24 = float3(1.0f, 255.0f, 255.0f*255.0f);\n"
" float4 alphabump=0;\n"
" float3 tevcoord;\n"
" float2 wrappedcoord, tempcoord;\n"
" float4 cc0, cc1, cc2, cprev;\n\n");
// HACK to handle cases where the tex gen is not enabled
if (numTexgen == 0)
{
WRITE(p, "float3 uv0 = float3(0.0f, 0.0f, 0.0f);\n");
}
else
{
for (int i = 0; i < numTexgen; ++i)
{
// optional perspective divides
if (xfregs.texcoords[i].texmtxinfo.projection == XF_TEXPROJ_STQ)
WRITE(p, "uv%d.xy = uv%d.xy/uv%d.z;\n", i, i, i);
// scale texture coordinates
WRITE(p, "uv%d.xy = uv%d.xy * "I_TEXDIMS"[%d].zw;\n", i, i, i);
}
}
// indirect texture map lookup
for(u32 i = 0; i < bpmem.genMode.numindstages; ++i)
{
if (nIndirectStagesUsed & (1<<i))
{
int texcoord = bpmem.tevindref.getTexCoord(i);
if (texcoord < numTexgen)
WRITE(p, "tempcoord = uv%d.xy * "I_INDTEXSCALE"[%d].%s;\n", texcoord, i/2, (i&1)?"zw":"xy");
else
WRITE(p, "tempcoord = float2(0.0f, 0.0f);\n");
char buffer[32];
sprintf(buffer, "float3 indtex%d", i);
SampleTexture(p, buffer, "tempcoord", "abg", bpmem.tevindref.getTexMap(i), texture_mask, 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, texture_mask, ApiType); //build the equation for this stage
if(numStages)
{
// 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(4.0f + prev * (255.0f/256.0f)) * (256.0f/255.0f);\n");
if (!WriteAlphaTest(p, ApiType))
{
// alpha test will always fail, so restart the shader and just make it an empty function
p = pmainstart;
WRITE(p, "ocol0 = 0;\n");
if(DepthTextureEnable)
WRITE(p, "depth = 1.f;\n");
WRITE(p, "discard;\n");
if(ApiType != API_D3D11)
WRITE(p, "return;\n");
}
else
{
if((bpmem.fog.c_proj_fsel.fsel != 0) || DepthTextureEnable)
{
if (numTexgen >= 7)
WRITE(p, "float4 clipPos = float4(uv0.w, uv1.w, uv2.w, uv3.w);\n");
// the screen space depth value = far z + (clip z / clip w) * z range
WRITE(p, "float zCoord = "I_ZBIAS"[1].x + (clipPos.z / clipPos.w) * "I_ZBIAS"[1].y;\n");
}
if (DepthTextureEnable)
{
// use the texture input of the last texture stage (textemp), hopefully this has been read and is in correct format...
if (bpmem.ztex2.op == ZTEXTURE_ADD)
WRITE(p, "zCoord = dot("I_ZBIAS"[0].xyzw, textemp.xyzw) + "I_ZBIAS"[1].w + zCoord;\n");
else
WRITE(p, "zCoord = dot("I_ZBIAS"[0].xyzw, textemp.xyzw) + "I_ZBIAS"[1].w;\n");
// scale to make result from frac correct
WRITE(p, "zCoord = zCoord * (16777215.0f/16777216.0f);\n");
WRITE(p, "zCoord = frac(zCoord);\n");
WRITE(p, "zCoord = zCoord * (16777216.0f/16777215.0f);\n");
WRITE(p, "depth = zCoord;\n");
}
if (dstAlphaEnable)
WRITE(p, " ocol0 = float4(prev.rgb, "I_ALPHA"[0].a);\n");
else
{
WriteFog(p);
WRITE(p, " ocol0 = prev;\n");
}
}
WRITE(p, "}\n");
if (text[sizeof(text) - 1] != 0x7C)
PanicAlert("PixelShader generator - buffer too small, canary has been eaten!");
setlocale(LC_NUMERIC, ""); // restore locale
return text;
}
//table with the color compare operations
static const char *TEVCMPColorOPTable[16] =
{
"float3(0.0f, 0.0f, 0.0f)",//0
"float3(0.0f, 0.0f, 0.0f)",//1
"float3(0.0f, 0.0f, 0.0f)",//2
"float3(0.0f, 0.0f, 0.0f)",//3
"float3(0.0f, 0.0f, 0.0f)",//4
"float3(0.0f, 0.0f, 0.0f)",//5
"float3(0.0f, 0.0f, 0.0f)",//6
"float3(0.0f, 0.0f, 0.0f)",//7
" %s + ((%s.r >= %s.r + (0.25f/255.0f)) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_R8_GT 8
" %s + ((abs(%s.r - %s.r) < (0.5f/255.0f)) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_R8_EQ 9
" %s + (( dot(%s.rgb, comp16) >= (dot(%s.rgb, comp16) + (0.25f/255.0f))) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_GR16_GT 10
" %s + (abs(dot(%s.rgb, comp16) - dot(%s.rgb, comp16)) < (0.5f/255.0f) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_GR16_EQ 11
" %s + (( dot(%s.rgb, comp24) >= (dot(%s.rgb, comp24) + (0.25f/255.0f))) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_BGR24_GT 12
" %s + (abs(dot(%s.rgb, comp24) - dot(%s.rgb, comp24)) < (0.5f/255.0f) ? %s : float3(0.0f, 0.0f, 0.0f))",//#define TEVCMP_BGR24_EQ 13
" %s + (max(sign(%s.rgb - %s.rgb - (0.25f/255.0f)), float3(0.0f, 0.0f, 0.0f)) * %s)",//#define TEVCMP_RGB8_GT 14
" %s + ((float3(1.0f, 1.0f, 1.0f) - max(sign(abs(%s.rgb - %s.rgb) - (0.5f/255.0f)), float3(0.0f, 0.0f, 0.0f))) * %s)"//#define TEVCMP_RGB8_EQ 15
};
//table with the alpha compare operations
static const char *TEVCMPAlphaOPTable[16] =
{
"0.0f",//0
"0.0f",//1
"0.0f",//2
"0.0f",//3
"0.0f",//4
"0.0f",//5
"0.0f",//6
"0.0f",//7
" %s.a + ((%s.r >= (%s.r + (0.25f/255.0f))) ? %s.a : 0.0f)",//#define TEVCMP_R8_GT 8
" %s.a + (abs(%s.r - %s.r) < (0.5f/255.0f) ? %s.a : 0.0f)",//#define TEVCMP_R8_EQ 9
" %s.a + ((dot(%s.rgb, comp16) >= (dot(%s.rgb, comp16) + (0.25f/255.0f))) ? %s.a : 0.0f)",//#define TEVCMP_GR16_GT 10
" %s.a + (abs(dot(%s.rgb, comp16) - dot(%s.rgb, comp16)) < (0.5f/255.0f) ? %s.a : 0.0f)",//#define TEVCMP_GR16_EQ 11
" %s.a + ((dot(%s.rgb, comp24) >= (dot(%s.rgb, comp24) + (0.25f/255.0f))) ? %s.a : 0.0f)",//#define TEVCMP_BGR24_GT 12
" %s.a + (abs(dot(%s.rgb, comp24) - dot(%s.rgb, comp24)) < (0.5f/255.0f) ? %s.a : 0.0f)",//#define TEVCMP_BGR24_EQ 13
" %s.a + ((%s.a >= (%s.a + (0.25f/255.0f))) ? %s.a : 0.0f)",//#define TEVCMP_A8_GT 14
" %s.a + (abs(%s.a - %s.a) < (0.5f/255.0f) ? %s.a : 0.0f)"//#define TEVCMP_A8_EQ 15
};
static void WriteStage(char *&p, int n, u32 texture_mask, API_TYPE ApiType)
{
char *rasswap = swapModeTable[bpmem.combiners[n].alphaC.rswap];
char *texswap = swapModeTable[bpmem.combiners[n].alphaC.tswap];
int texcoord = bpmem.tevorders[n/2].getTexCoord(n&1);
bool bHasTexCoord = (u32)texcoord < bpmem.genMode.numtexgens;
bool bHasIndStage = bpmem.tevind[n].IsActive() && bpmem.tevind[n].bt < bpmem.genMode.numindstages;
// HACK to handle cases where the tex gen is not enabled
if (!bHasTexCoord)
texcoord = 0;
if (bHasIndStage)
{
// perform the indirect op on the incoming regular coordinates using indtex%d as the offset coords
if (bpmem.tevind[n].bs != ITBA_OFF)
{
WRITE(p, "alphabump = indtex%d.%s %s;\n",
bpmem.tevind[n].bt,
tevIndAlphaSel[bpmem.tevind[n].bs],
tevIndAlphaScale[bpmem.tevind[n].fmt]);
}
// format
WRITE(p, "float3 indtevcrd%d = indtex%d * %s;\n", n, bpmem.tevind[n].bt, tevIndFmtScale[bpmem.tevind[n].fmt]);
// bias
if (bpmem.tevind[n].bias != ITB_NONE )
WRITE(p, "indtevcrd%d.%s += %s;\n", n, tevIndBiasField[bpmem.tevind[n].bias], tevIndBiasAdd[bpmem.tevind[n].fmt]);
// multiply by offset matrix and scale
if (bpmem.tevind[n].mid != 0)
{
if (bpmem.tevind[n].mid <= 3)
{
int mtxidx = 2*(bpmem.tevind[n].mid-1);
WRITE(p, "float2 indtevtrans%d = float2(dot("I_INDTEXMTX"[%d].xyz, indtevcrd%d), dot("I_INDTEXMTX"[%d].xyz, indtevcrd%d));\n",
n, mtxidx, n, mtxidx+1, n);
}
else if (bpmem.tevind[n].mid <= 7 && bHasTexCoord)
{ // s matrix
int mtxidx = 2*(bpmem.tevind[n].mid-5);
WRITE(p, "float2 indtevtrans%d = "I_INDTEXMTX"[%d].ww * uv%d.xy * indtevcrd%d.xx;\n", n, mtxidx, texcoord, n);
}
else if (bpmem.tevind[n].mid <= 11 && bHasTexCoord)
{ // t matrix
int mtxidx = 2*(bpmem.tevind[n].mid-9);
WRITE(p, "float2 indtevtrans%d = "I_INDTEXMTX"[%d].ww * uv%d.xy * indtevcrd%d.yy;\n", n, mtxidx, texcoord, n);
}
else
WRITE(p, "float2 indtevtrans%d = 0;\n", n);
}
else
WRITE(p, "float2 indtevtrans%d = 0;\n", n);
// ---------
// Wrapping
// ---------
// wrap S
if (bpmem.tevind[n].sw == ITW_OFF)
WRITE(p, "wrappedcoord.x = uv%d.x;\n", texcoord);
else if (bpmem.tevind[n].sw == ITW_0)
WRITE(p, "wrappedcoord.x = 0.0f;\n");
else
WRITE(p, "wrappedcoord.x = fmod( uv%d.x, %s );\n", texcoord, tevIndWrapStart[bpmem.tevind[n].sw]);
// wrap T
if (bpmem.tevind[n].tw == ITW_OFF)
WRITE(p, "wrappedcoord.y = uv%d.y;\n", texcoord);
else if (bpmem.tevind[n].tw == ITW_0)
WRITE(p, "wrappedcoord.y = 0.0f;\n");
else
WRITE(p, "wrappedcoord.y = fmod( uv%d.y, %s );\n", texcoord, tevIndWrapStart[bpmem.tevind[n].tw]);
if (bpmem.tevind[n].fb_addprev) // add previous tevcoord
WRITE(p, "tevcoord.xy += wrappedcoord + indtevtrans%d;\n", n);
else
WRITE(p, "tevcoord.xy = wrappedcoord + indtevtrans%d;\n", n);
}
WRITE(p, "rastemp = %s.%s;\n", tevRasTable[bpmem.tevorders[n / 2].getColorChan(n & 1)], rasswap);
if (bpmem.tevorders[n/2].getEnable(n&1))
{
int texmap = bpmem.tevorders[n/2].getTexMap(n&1);
if(!bHasIndStage)
{
// calc tevcord
if(bHasTexCoord)
WRITE(p, "tevcoord.xy = uv%d.xy;\n", texcoord);
else
WRITE(p, "tevcoord.xy = float2(0.0f, 0.0f);\n");
}
SampleTexture(p, "textemp", "tevcoord", texswap, texmap, texture_mask, ApiType);
}
else
WRITE(p, "textemp = float4(1.0f, 1.0f, 1.0f, 1.0f);\n");
int kc = bpmem.tevksel[n / 2].getKC(n & 1);
int ka = bpmem.tevksel[n / 2].getKA(n & 1);
TevStageCombiner::ColorCombiner &cc = bpmem.combiners[n].colorC;
TevStageCombiner::AlphaCombiner &ac = bpmem.combiners[n].alphaC;
bool bCKonst = cc.a == TEVCOLORARG_KONST || cc.b == TEVCOLORARG_KONST || cc.c == TEVCOLORARG_KONST || cc.d == TEVCOLORARG_KONST;
bool bAKonst = ac.a == TEVALPHAARG_KONST || ac.b == TEVALPHAARG_KONST || ac.c == TEVALPHAARG_KONST || ac.d == TEVALPHAARG_KONST;
if (bCKonst || bAKonst )
WRITE(p, "konsttemp = float4(%s, %s);\n", tevKSelTableC[kc], tevKSelTableA[ka]);
if(cc.a == TEVCOLORARG_CPREV
|| cc.a == TEVCOLORARG_APREV
|| 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(4.0f + 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;
}
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(4.0f + 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;
}
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(4.0f + 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;
}
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(4.0f + 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
WRITE(p, "%s = ", tevCOutputTable[cc.dest]);
// combine the color channel
if (cc.bias != TevBias_COMPARE) // if not compare
{
//normal color combiner goes here
if (cc.shift > TEVSCALE_1)
WRITE(p, "%s*(", tevScaleTable[cc.shift]);
if(!(cc.d == TEVCOLORARG_ZERO && cc.op == TEVOP_ADD))
WRITE(p, "%s%s", tevCInputTable[cc.d], tevOpTable[cc.op]);
if (cc.a == cc.b)
WRITE(p, "%s", tevCInputTable[cc.a + 16]);
else if (cc.c == TEVCOLORARG_ZERO)
WRITE(p, "%s", tevCInputTable[cc.a + 16]);
else if (cc.c == TEVCOLORARG_ONE)
WRITE(p, "%s", tevCInputTable[cc.b + 16]);
else if (cc.a == TEVCOLORARG_ZERO)
WRITE(p, "%s*%s", tevCInputTable[cc.b + 16], tevCInputTable[cc.c + 16]);
else if (cc.b == TEVCOLORARG_ZERO)
WRITE(p, "%s*(float3(1.0f, 1.0f, 1.0f)-%s)", tevCInputTable[cc.a + 16], tevCInputTable[cc.c + 16]);
else
WRITE(p, "lerp(%s, %s, %s)", tevCInputTable[cc.a + 16], tevCInputTable[cc.b + 16], tevCInputTable[cc.c + 16]);
WRITE(p, "%s", tevBiasTable[cc.bias]);
if (cc.shift > 0)
WRITE(p, ")");
}
else
{
int cmp = (cc.shift<<1)|cc.op|8; // comparemode stored here
WRITE(p, TEVCMPColorOPTable[cmp],//lookup the function from the op table
tevCInputTable[cc.d],
tevCInputTable[cc.a + 16],
tevCInputTable[cc.b + 16],
tevCInputTable[cc.c + 16]);
}
if (cc.clamp)
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]);
else
WRITE(p, "%s = ", tevAOutputTable[ac.dest]);
if (ac.bias != TevBias_COMPARE) // if not compare
{
//normal alpha combiner goes here
if (ac.shift > TEVSCALE_1)
WRITE(p, "%s*(", tevScaleTable[ac.shift]);
if(!(ac.d == TEVALPHAARG_ZERO && ac.op == TEVOP_ADD))
WRITE(p, "%s.a%s", tevAInputTable[ac.d], tevOpTable[ac.op]);
if (ac.a == ac.b)
WRITE(p, "%s.a", tevAInputTable[ac.a + 8]);
else if (ac.c == TEVALPHAARG_ZERO)
WRITE(p, "%s.a", tevAInputTable[ac.a + 8]);
else if (ac.a == TEVALPHAARG_ZERO)
WRITE(p, "%s.a*%s.a", tevAInputTable[ac.b + 8], tevAInputTable[ac.c + 8]);
else if (ac.b == TEVALPHAARG_ZERO)
WRITE(p, "%s.a*(1.0f-%s.a)", tevAInputTable[ac.a + 8], tevAInputTable[ac.c + 8]);
else
WRITE(p, "lerp(%s.a, %s.a, %s.a)", tevAInputTable[ac.a + 8], tevAInputTable[ac.b + 8], tevAInputTable[ac.c + 8]);
WRITE(p, "%s",tevBiasTable[ac.bias]);
if (ac.shift>0)
WRITE(p, ")");
}
else
{
//compare alpha combiner goes here
int cmp = (ac.shift<<1)|ac.op|8; // comparemode stored here
WRITE(p, TEVCMPAlphaOPTable[cmp],
tevAInputTable[ac.d],
tevAInputTable[ac.a + 8],
tevAInputTable[ac.b + 8],
tevAInputTable[ac.c + 8]);
}
if (ac.clamp)
WRITE(p, ")");
WRITE(p, ";\n\n");
}
void SampleTexture(char *&p, const char *destination, const char *texcoords, const char *texswap, int texmap, u32 texture_mask, API_TYPE ApiType)
{
if (texture_mask & (1<<texmap)) {// opengl only
// non pow 2
bool bwraps = (texture_mask & (0x100<<texmap)) ? true : false;
bool bwrapt = (texture_mask & (0x10000<<texmap)) ? true : false;
if (bwraps || bwrapt) {
if (bwraps) {
WRITE(p, "tempcoord.x = fmod(%s.x, "I_TEXDIMS"[%d].x);\n", texcoords, texmap);
}
else {
WRITE(p, "tempcoord.x = %s.x;\n", texcoords);
}
if (bwrapt) {
WRITE(p, "tempcoord.y = fmod(%s.y, "I_TEXDIMS"[%d].y);\n", texcoords, texmap);
}
else {
WRITE(p, "tempcoord.y = %s.y;\n", texcoords);
}
WRITE(p, "%s=texRECT(samp%d,tempcoord.xy).%s;\n", destination, texmap, texswap);
}
else
{
WRITE(p, "%s=texRECT(samp%d,%s.xy).%s;\n", destination, texmap, texcoords, texswap);
}
}
else
{
if (ApiType == API_D3D11)
WRITE(p, "%s=Tex%d.Sample(samp%d,%s.xy * "I_TEXDIMS"[%d].xy).%s;\n", destination, texmap,texmap, texcoords, texmap, texswap);
else
WRITE(p, "%s=tex2D(samp%d,%s.xy * "I_TEXDIMS"[%d].xy).%s;\n", destination, texmap, texcoords, texmap, texswap);
}
}
static const char *tevAlphaFuncsTable[] =
{
"(false)", //ALPHACMP_NEVER 0
"(prev.a <= %s - (0.25f/255.0f))", //ALPHACMP_LESS 1
"(abs( prev.a - %s ) < (0.5f/255.0f))", //ALPHACMP_EQUAL 2
"(prev.a < %s + (0.25f/255.0f))", //ALPHACMP_LEQUAL 3
"(prev.a >= %s + (0.25f/255.0f))", //ALPHACMP_GREATER 4
"(abs( prev.a - %s ) >= (0.5f/255.0f))", //ALPHACMP_NEQUAL 5
"(prev.a > %s - (0.25f/255.0f))", //ALPHACMP_GEQUAL 6
"(true)" //ALPHACMP_ALWAYS 7
};
static const char *tevAlphaFunclogicTable[] =
{
" && ", // and
" || ", // or
" != ", // xor
" == " // xnor
};
static bool WriteAlphaTest(char *&p, API_TYPE ApiType)
{
u32 op = bpmem.alphaFunc.logic;
u32 comp[2] = {bpmem.alphaFunc.comp0, bpmem.alphaFunc.comp1};
// First kill all the simple cases
switch(op)
{
case 0: // AND
if (comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) return true;
if (comp[0] == ALPHACMP_NEVER || comp[1] == ALPHACMP_NEVER) return false;
break;
case 1: // OR
if (comp[0] == ALPHACMP_ALWAYS || comp[1] == ALPHACMP_ALWAYS) return true;
if (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER)return false;
break;
case 2: // XOR
if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_NEVER) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_ALWAYS))
return true;
if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER))
return false;
break;
case 3: // XNOR
if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_NEVER) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_ALWAYS))
return false;
if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER))
return true;
break;
default: PanicAlert("bad logic for alpha test? %08x", op);
}
// using discard then return works the same in cg and dx9 but not in dx11
WRITE(p, "if(!( ");
int compindex = bpmem.alphaFunc.comp0 % 8;
WRITE(p, tevAlphaFuncsTable[compindex],alphaRef[0]);//lookup the first component from the alpha function table
WRITE(p, "%s", tevAlphaFunclogicTable[bpmem.alphaFunc.logic % 4]);//lookup the logic op
compindex = bpmem.alphaFunc.comp1 % 8;
WRITE(p, tevAlphaFuncsTable[compindex],alphaRef[1]);//lookup the second component from the alpha function table
WRITE(p, ")){ocol0 = 0;%sdiscard;%s}\n",DepthTextureEnable ? "depth = 1.f;" : "",(ApiType != API_D3D11)? "return;" : "");
return true;
}
static const char *tevFogFuncsTable[] =
{
"", //No Fog
"", //?
"", //Linear
"", //?
" fog = 1.0f - pow(2, -8.0f * fog);\n", //exp
" fog = 1.0f - pow(2, -8.0f * fog * fog);\n", //exp2
" fog = pow(2, -8.0f * (1.0f - fog));\n", //backward exp
" fog = 1.0f - fog;\n fog = pow(2, -8.0f * fog * fog);\n" //backward exp2
};
static void WriteFog(char *&p)
{
if(bpmem.fog.c_proj_fsel.fsel == 0)return;//no Fog
if (bpmem.fog.c_proj_fsel.proj == 0)
{
// perspective
// ze = A/(B - Zs)
WRITE (p, " float ze = "I_FOG"[1].x / ("I_FOG"[1].y - zCoord);\n");
}
else
{
// orthographic
// ze = a*Zs
WRITE (p, " float ze = "I_FOG"[1].x * zCoord;\n");
}
WRITE (p, " float fog = saturate(ze - "I_FOG"[1].z);\n");
if(bpmem.fog.c_proj_fsel.fsel > 3)
{
WRITE(p, "%s", tevFogFuncsTable[bpmem.fog.c_proj_fsel.fsel]);
}
else
{
if(bpmem.fog.c_proj_fsel.fsel != 2)
WARN_LOG(VIDEO, "Unknown Fog Type! %08x", bpmem.fog.c_proj_fsel.fsel);
}
WRITE(p, " prev.rgb = lerp(prev.rgb,"I_FOG"[0].rgb,fog);\n");
}
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