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

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// Copyright (C) 2003-2009 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 "Profiler.h"
#include "PixelShaderGen.h"
#include "XFMemory.h" // for texture projection mode
#include "BPMemory.h"
// 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 ....
void GetPixelShaderId(PIXELSHADERUID &uid, u32 s_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] = s_texturemask;
uid.values[3] = (u32)bpmem.fog.c_proj_fsel.fsel |
((u32)bpmem.fog.c_proj_fsel.proj << 3);
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;
}
}
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;
}
}
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;
}
}
// 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);
static void SampleTexture(char *&p, const char *destination, const char *texcoords, const char *texswap, int texmap, u32 texture_mask);
static void WriteAlphaCompare(char *&p, int num, int comp);
static bool WriteAlphaTest(char *&p, bool HLSL);
static void WriteFog(char *&p);
const float epsilon8bit = 1.0f / 255.0f;
static const char *tevKSelTableC[] = // KCSEL
{
"1.0f,1.0f,1.0f", //1 = 0x00
"0.875,0.875,0.875",//7_8 = 0x01
"0.75,0.75,0.75", //3_4 = 0x02
"0.625,0.625,0.625",//5_8 = 0x03
"0.5,0.5,0.5", //1_2 = 0x04
"0.375,0.375,0.375",//3_8 = 0x05
"0.25,0.25,0.25", //1_4 = 0x06
"0.125,0.125,0.125",//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 *tevCompOpTable[] = { ">", "==" };
#define TEVCMP_R8 0
#define TEVCMP_GR16 1
#define TEVCMP_BGR24 2
#define TEVCMP_RGB8 3
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(.5f,.5f,.5f)", //HALF,
"konsttemp.rgb", //KONST,
"float3(0.0f,0.0f,0.0f)", //ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
};
static const char *tevCInputTable2[] = // CC
{
"prev", //CPREV,
"(prev.aaa)", //APREV,
"c0", //C0,
"(c0.aaa)", //A0,
"c1", //C1,
"(c1.aaa)", //A1,
"c2", //C2,
"(c2.aaa)", //A2,
"textemp", //TEXC,
"(textemp.aaa)", //TEXA,
"rastemp", //RASC,
"(rastemp.aaa)", //RASA,
"float3(1.0f,1.0f,1.0f)", //ONE,
"float3(.5f,.5f,.5f)", //HALF,
"konsttemp", //"konsttemp.rgb", //KONST,
"float3(0.0f,0.0f,0.0f)", //ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
};
static const char *tevAInputTable[] = // CA
{
"prev.a", //APREV,
"c0.a", //A0,
"c1.a", //A1,
"c2.a", //A2,
"textemp.a", //TEXA,
"rastemp.a", //RASA,
"konsttemp.a", //KONST
"0.0", //ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR",
};
static const char *tevAInputTable2[] = // CA
{
"prev", //APREV,
"c0", //A0,
"c1", //A1,
"c2", //A2,
"textemp", //TEXA,
"rastemp", //RASA,
"konsttemp", //KONST, (hw1 had quarter)
"float4(0,0,0,0)", //ZERO
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"PADERROR", "PADERROR", "PADERROR", "PADERROR",
"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(0,0,0,0)", // zero
};
static const char *alphaRef[2] =
{
I_ALPHA"[0].x",
I_ALPHA"[0].y"
};
//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 *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", "256", "128", "64", "32", "16", "0.001" };
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 void BuildSwapModeTable()
{
//bpmem.tevregs[0].
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 *GeneratePixelShader(u32 texture_mask, bool dstAlphaEnable, bool HLSL)
{
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;
}
}
}
// Declare samplers
if (texture_mask) {
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) {
WRITE(p, "uniform sampler2D ");
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");
}
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");
WRITE(p, " out half4 ocol0 : COLOR0,\n");
WRITE(p, " out float depth : DEPTH,\n");
// 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, " in float3 uv%d : TEXCOORD%d, \n", i, i);
WRITE(p, " in float4 clipPos : TEXCOORD%d, \n", numTexgen);
} else {
// wpos is in w of first 4 texcoords
for (int i = 0; i < numTexgen; ++i)
WRITE(p, " in float%d uv%d : TEXCOORD%d, \n", i<4?4:3, i, i);
}
WRITE(p, " in float4 colors[2] : COLOR0){\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,rastemp,konsttemp=float4(0.0f,0.0f,0.0f,0.0f);\n"
"float3 comp16 = float3(1,255,0), comp24 = float3(1,255,255*255);\n"
"float4 alphabump=0;\n"
"float3 tevcoord;\n"
"float2 wrappedcoord, tempcoord;\n\n");
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);
}
}
// 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");
}
for (int i = 0; i < numStages; i++)
WriteStage(p, i, texture_mask); //build the equation for this stage
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");
// 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, "depth = frac(dot("I_ZBIAS"[0].xyzw, textemp.xyzw) + "I_ZBIAS"[1].w + zCoord);\n");
}
else if (bpmem.ztex2.op == ZTEXTURE_REPLACE) {
WRITE(p, "depth = frac(dot("I_ZBIAS"[0].xyzw, textemp.xyzw) + "I_ZBIAS"[1].w);\n");
}
else {
WRITE(p, "depth = zCoord;\n");
}
//if (bpmem.genMode.numindstages ) WRITE(p, "prev.rg = indtex0.xy;\nprev.b = 0;\n");
if (!WriteAlphaTest(p, HLSL)) {
// alpha test will always fail, so restart the shader and just make it an empty function
p = pmainstart;
WRITE(p, "discard;\n");
WRITE(p, "ocol0 = 0;\n");
}
else {
if (dstAlphaEnable) {
WRITE(p, " ocol0 = float4(prev.rgb,"I_ALPHA"[0].w);\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!");
return text;
}
static void WriteStage(char *&p, int n, u32 texture_mask)
{
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 the bump alpha
if (bpmem.tevind[n].fmt == ITF_8) {
WRITE(p, "alphabump = indtex%d.%s %s;\n", bpmem.tevind[n].bt,
tevIndAlphaSel[bpmem.tevind[n].bs], tevIndAlphaScale[bpmem.tevind[n].fmt]);
}
else {
// donkopunchstania: really bad way to do this
// cannot always use fract because fract(1.0) is 0.0 when it needs to be 1.0
// omitting fract seems to work as well
WRITE(p, "if (indtex%d.%s >= 1.0f )\n", bpmem.tevind[n].bt,
tevIndAlphaSel[bpmem.tevind[n].bs]);
WRITE(p, " alphabump = 1.0f;\n");
WRITE(p, "else\n");
WRITE(p, " alphabump = fract ( 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);
}
else
WRITE(p, "textemp=float4(1,1,1,1);\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]);
WRITE(p, "%s= ", tevCOutputTable[cc.dest]);
// combine the color channel
if (cc.bias != 3) { // if not compare
//normal color combiner goes here
WRITE(p, " %s*(%s%s",tevScaleTable[cc.shift],tevCInputTable[cc.d],tevOpTable[cc.op]);
WRITE(p, "lerp(%s,%s,%s) %s);\n",
tevCInputTable[cc.a], tevCInputTable[cc.b],
tevCInputTable[cc.c], tevBiasTable[cc.bias]);
}
else {
int cmp = (cc.shift<<1)|cc.op|8; // comparemode stored here
switch(cmp) {
case TEVCMP_R8_GT:
case TEVCMP_RGB8_GT: // per component compares
WRITE(p, " %s + ((%s.%s > %s.%s) ? %s : float3(0.0f,0.0f,0.0f));\n",
tevCInputTable[cc.d], tevCInputTable2[cc.a], cmp==TEVCMP_R8_GT?"r":"rgb", tevCInputTable2[cc.b], cmp==TEVCMP_R8_GT?"r":"rgb", tevCInputTable[cc.c]);
break;
case TEVCMP_R8_EQ:
case TEVCMP_RGB8_EQ:
WRITE(p, " %s + (abs(%s.r - %s.r)<%f ? %s : float3(0.0f,0.0f,0.0f));\n",
tevCInputTable[cc.d], tevCInputTable2[cc.a], tevCInputTable2[cc.b], epsilon8bit, tevCInputTable[cc.c]);
break;
case TEVCMP_GR16_GT: // 16 bit compares: 255*g+r (probably used for ztextures, so make sure in ztextures, g is the most significant byte)
case TEVCMP_BGR24_GT: // 24 bit compares: 255*255*b+255*g+r
WRITE(p, " %s + (( dot(%s.rgb-%s.rgb, comp%s) > 0) ? %s : float3(0.0f,0.0f,0.0f));\n",
tevCInputTable[cc.d], tevCInputTable2[cc.a], tevCInputTable2[cc.b], cmp==TEVCMP_GR16_GT?"16":"24", tevCInputTable[cc.c]);
break;
case TEVCMP_GR16_EQ:
case TEVCMP_BGR24_EQ:
WRITE(p, " %s + (abs(dot(%s.rgb - %s.rgb, comp%s))<%f ? %s : float3(0.0f,0.0f,0.0f));\n",
tevCInputTable[cc.d], tevCInputTable2[cc.a], tevCInputTable2[cc.b], cmp==TEVCMP_GR16_EQ?"16":"24", epsilon8bit, tevCInputTable[cc.c]);
break;
default:
WRITE(p, "float3(0.0f,0.0f,0.0f);\n");
break;
}
}
if (cc.clamp)
WRITE(p, "%s = clamp(%s,0.0f,1.0f);\n", tevCOutputTable[cc.dest],tevCOutputTable[cc.dest]);
// combine the alpha channel
WRITE(p, "%s= ", tevAOutputTable[ac.dest]);
if (ac.bias != 3) { // if not compare
//normal alpha combiner goes here
WRITE(p, " %s*(%s%s",tevScaleTable[ac.shift],tevAInputTable[ac.d],tevOpTable[ac.op]);
WRITE(p, "lerp(%s,%s,%s) %s)\n",
tevAInputTable[ac.a],tevAInputTable[ac.b],
tevAInputTable[ac.c],tevBiasTable[ac.bias]);
}
else {
//compare alpha combiner goes here
int cmp = (ac.shift<<1)|ac.op|8; // comparemode stored here
switch(cmp) {
case TEVCMP_R8_GT:
case TEVCMP_A8_GT:
WRITE(p, " %s + ((%s.%s > %s.%s) ? %s : 0)\n",
tevAInputTable[ac.d],tevAInputTable2[ac.a], cmp==TEVCMP_R8_GT?"r":"a", tevAInputTable2[ac.b], cmp==TEVCMP_R8_GT?"r":"a", tevAInputTable[ac.c]);
break;
case TEVCMP_R8_EQ:
case TEVCMP_A8_EQ:
WRITE(p, " %s + (abs(%s.r - %s.r)<%f ? %s : 0)\n",
tevAInputTable[ac.d],tevAInputTable2[ac.a], tevAInputTable2[ac.b],epsilon8bit,tevAInputTable[ac.c]);
break;
case TEVCMP_GR16_GT: // 16 bit compares: 255*g+r (probably used for ztextures, so make sure in ztextures, g is the most significant byte)
case TEVCMP_BGR24_GT: // 24 bit compares: 255*255*b+255*g+r
WRITE(p, " %s + (( dot(%s.rgb-%s.rgb, comp%s) > 0) ? %s : 0)\n",
tevAInputTable[ac.d],tevAInputTable2[ac.a], tevAInputTable2[ac.b], cmp==TEVCMP_GR16_GT?"16":"24", tevAInputTable[ac.c]);
break;
case TEVCMP_GR16_EQ:
case TEVCMP_BGR24_EQ:
WRITE(p, " %s + (abs(dot(%s.rgb - %s.rgb, comp%s))<%f ? %s : 0)\n",
tevAInputTable[ac.d],tevAInputTable2[ac.a], tevAInputTable2[ac.b],cmp==TEVCMP_GR16_EQ?"16":"24",epsilon8bit,tevAInputTable[ac.c]);
break;
default:
WRITE(p, "0)\n");
break;
}
}
WRITE(p, ";\n");
if (ac.clamp)
WRITE(p, "%s = clamp(%s,0.0f,1.0f);\n", tevAOutputTable[ac.dest],tevAOutputTable[ac.dest]);
WRITE(p, "\n");
}
void SampleTexture(char *&p, const char *destination, const char *texcoords, const char *texswap, int texmap, u32 texture_mask)
{
if (texture_mask & (1<<texmap)) {
// 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 {
WRITE(p, "%s=tex2D(samp%d,%s.xy * "I_TEXDIMS"[%d].xy).%s;\n", destination, texmap, texcoords, texmap, texswap);
}
}
static void WriteAlphaCompare(char *&p, int num, int comp)
{
switch(comp) {
case ALPHACMP_ALWAYS: WRITE(p, "(false)"); break;
case ALPHACMP_NEVER: WRITE(p, "(true)"); break;
case ALPHACMP_LEQUAL: WRITE(p, "(prev.a > %s)",alphaRef[num]); break;
case ALPHACMP_LESS: WRITE(p, "(prev.a >= %s - %f)",alphaRef[num],epsilon8bit*0.5f);break;
case ALPHACMP_GEQUAL: WRITE(p, "(prev.a < %s)",alphaRef[num]); break;
case ALPHACMP_GREATER: WRITE(p, "(prev.a <= %s + %f)",alphaRef[num],epsilon8bit*0.5f);break;
case ALPHACMP_EQUAL: WRITE(p, "(abs(prev.a-%s)>%f)",alphaRef[num],epsilon8bit*2); break;
case ALPHACMP_NEQUAL: WRITE(p, "(abs(prev.a-%s)<%f)",alphaRef[num],epsilon8bit*2); break;
}
}
static bool WriteAlphaTest(char *&p, bool HLSL)
{
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) {
WRITE(p, "discard;\n");
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) {
WRITE(p, "discard;\n");
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)) {
WRITE(p, "discard;\n");
return false;
}
break;
case 3: // xnor
if ( (comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_NEVER) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_ALWAYS)) {
WRITE(p, "discard;\n");
return false;
}
if ( (comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER) )
return true;
break;
}
// Seems we need discard for Cg and clip for d3d. sigh.
if (HLSL)
WRITE(p, "clip( ");
else {
WRITE(p, "discard( ");
}
WriteAlphaCompare(p, 0, bpmem.alphaFunc.comp0);
// negated because testing the inverse condition
switch (bpmem.alphaFunc.logic) {
case 0: WRITE(p, " || "); break; // and
case 1: WRITE(p, " && "); break; // or
case 2: WRITE(p, " == "); break; // xor
case 3: WRITE(p, " != "); break; // xnor
}
WriteAlphaCompare(p, 1, bpmem.alphaFunc.comp1);
WRITE(p, ");\n");
return true;
}
static void WriteFog(char *&p)
{
bool enabled = bpmem.fog.c_proj_fsel.fsel == 0 ? false : true;
if (enabled) {
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 - depth);\n");
} else {
// orthographic
// ze = a*Zs
WRITE (p, " float ze = "I_FOG"[1].x * depth;\n");
}
WRITE (p, " float fog = clamp(ze - "I_FOG"[1].z, 0.0f, 1.0f);\n");
}
switch (bpmem.fog.c_proj_fsel.fsel) {
case 2: // linear
// empty
break;
case 4: // exp
WRITE(p, " fog = 1.0f - pow(2, -8.0f * fog);\n");
break;
case 5: // exp2
WRITE(p, " fog = 1.0f - pow(2, -8.0f * fog * fog);\n");
break;
case 6: // backward exp
WRITE(p, " fog = 1.0f - fog;\n");
WRITE(p, " fog = pow(2, -8.0f * fog);\n");
break;
case 7: // backward exp2
WRITE(p, " fog = 1.0f - fog;\n");
WRITE(p, " fog = pow(2, -8.0f * fog * fog);\n");
break;
}
if (enabled) {
WRITE(p, " prev.rgb = (1.0f - fog) * prev.rgb + (fog * "I_FOG"[0].rgb);\n");
}
}
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