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dolphin/Source/Core/VideoCommon/Src/VertexShaderGen.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 <math.h>
#include <locale.h>
#include "NativeVertexFormat.h"
#include "BPMemory.h"
#include "CPMemory.h"
#include "VertexShaderGen.h"
#include "VideoConfig.h"
VERTEXSHADERUID last_vertex_shader_uid;
// Mash together all the inputs that contribute to the code of a generated vertex shader into
// a unique identifier, basically containing all the bits. Yup, it's a lot ....
void GetVertexShaderId(VERTEXSHADERUID *uid, u32 components)
{
uid->values[0] = components |
(xfregs.numTexGens << 23) |
(xfregs.nNumChans << 27) |
((u32)xfregs.bEnableDualTexTransform << 29);
for (int i = 0; i < 2; ++i) {
uid->values[1+i] = xfregs.colChans[i].color.enablelighting ?
(u32)xfregs.colChans[i].color.hex :
(u32)xfregs.colChans[i].color.matsource;
uid->values[1+i] |= (xfregs.colChans[i].alpha.enablelighting ?
(u32)xfregs.colChans[i].alpha.hex :
(u32)xfregs.colChans[i].alpha.matsource) << 15;
}
uid->values[2] |= (g_ActiveConfig.bEnablePixelLigting && g_ActiveConfig.backend_info.bSupportsPixelLighting) << 31;
u32 *pcurvalue = &uid->values[3];
for (int i = 0; i < xfregs.numTexGens; ++i) {
TexMtxInfo tinfo = xfregs.texcoords[i].texmtxinfo;
if (tinfo.texgentype != XF_TEXGEN_EMBOSS_MAP)
tinfo.hex &= 0x7ff;
if (tinfo.texgentype != XF_TEXGEN_REGULAR)
tinfo.projection = 0;
u32 val = ((tinfo.hex >> 1) & 0x1ffff);
if (xfregs.bEnableDualTexTransform && tinfo.texgentype == XF_TEXGEN_REGULAR) {
// rewrite normalization and post index
val |= ((u32)xfregs.texcoords[i].postmtxinfo.index << 17) | ((u32)xfregs.texcoords[i].postmtxinfo.normalize << 23);
}
switch (i & 3) {
case 0: pcurvalue[0] |= val; break;
case 1: pcurvalue[0] |= val << 24; pcurvalue[1] = val >> 8; ++pcurvalue; break;
case 2: pcurvalue[0] |= val << 16; pcurvalue[1] = val >> 16; ++pcurvalue; break;
case 3: pcurvalue[0] |= val << 8; ++pcurvalue; break;
}
}
}
static char text[16384];
#define WRITE p+=sprintf
#define LIGHTS_POS ""
char *GenerateLightShader(char *p, int index, const LitChannel& chan, const char *dest, int coloralpha);
const char *GenerateVertexShaderCode(u32 components, API_TYPE api_type)
{
setlocale(LC_NUMERIC, "C"); // Reset locale for compilation
text[sizeof(text) - 1] = 0x7C; // canary
_assert_(bpmem.genMode.numtexgens == xfregs.numTexGens);
_assert_(bpmem.genMode.numcolchans == xfregs.nNumChans);
bool is_d3d = (api_type == API_D3D9 || api_type == API_D3D11);
u32 lightMask = 0;
if (xfregs.nNumChans > 0)
lightMask |= xfregs.colChans[0].color.GetFullLightMask() | xfregs.colChans[0].alpha.GetFullLightMask();
if (xfregs.nNumChans > 1)
lightMask |= xfregs.colChans[1].color.GetFullLightMask() | xfregs.colChans[1].alpha.GetFullLightMask();
char *p = text;
WRITE(p, "//Vertex Shader: comp:%x, \n", components);
WRITE(p, "typedef struct { float4 T0, T1, T2; float4 N0, N1, N2; } s_"I_POSNORMALMATRIX";\n"
"typedef struct { float4 t; } FLT4;\n"
"typedef struct { FLT4 T[24]; } s_"I_TEXMATRICES";\n"
"typedef struct { FLT4 T[64]; } s_"I_TRANSFORMMATRICES";\n"
"typedef struct { FLT4 T[32]; } s_"I_NORMALMATRICES";\n"
"typedef struct { FLT4 T[64]; } s_"I_POSTTRANSFORMMATRICES";\n"
"typedef struct { float4 col; float4 cosatt; float4 distatt; float4 pos; float4 dir; } Light;\n"
"typedef struct { Light lights[8]; } s_"I_LIGHTS";\n"
"typedef struct { float4 C0, C1, C2, C3; } s_"I_MATERIALS";\n"
"typedef struct { float4 T0, T1, T2, T3; } s_"I_PROJECTION";\n"
);
WRITE(p, "struct VS_OUTPUT {\n");
WRITE(p, " float4 pos : POSITION;\n");
WRITE(p, " float4 colors_0 : COLOR0;\n");
WRITE(p, " float4 colors_1 : COLOR1;\n");
if (xfregs.numTexGens < 7) {
for (int i = 0; i < xfregs.numTexGens; ++i)
WRITE(p, " float3 tex%d : TEXCOORD%d;\n", i, i);
WRITE(p, " float4 clipPos : TEXCOORD%d;\n", xfregs.numTexGens);
if(g_ActiveConfig.bEnablePixelLigting && g_ActiveConfig.backend_info.bSupportsPixelLighting)
WRITE(p, " float4 Normal : TEXCOORD%d;\n", xfregs.numTexGens + 1);
} else {
// clip position is in w of first 4 texcoords
if(g_ActiveConfig.bEnablePixelLigting && g_ActiveConfig.backend_info.bSupportsPixelLighting)
{
for (int i = 0; i < 8; ++i)
WRITE(p, " float4 tex%d : TEXCOORD%d;\n", i, i);
}
else
{
for (int i = 0; i < xfregs.numTexGens; ++i)
WRITE(p, " float%d tex%d : TEXCOORD%d;\n", i < 4 ? 4 : 3 , i, i);
}
}
WRITE(p, "};\n");
// uniforms
WRITE(p, "uniform s_"I_TRANSFORMMATRICES" "I_TRANSFORMMATRICES" : register(c%d);\n", C_TRANSFORMMATRICES);
WRITE(p, "uniform s_"I_TEXMATRICES" "I_TEXMATRICES" : register(c%d);\n", C_TEXMATRICES); // also using tex matrices
WRITE(p, "uniform s_"I_NORMALMATRICES" "I_NORMALMATRICES" : register(c%d);\n", C_NORMALMATRICES);
WRITE(p, "uniform s_"I_POSNORMALMATRIX" "I_POSNORMALMATRIX" : register(c%d);\n", C_POSNORMALMATRIX);
WRITE(p, "uniform s_"I_POSTTRANSFORMMATRICES" "I_POSTTRANSFORMMATRICES" : register(c%d);\n", C_POSTTRANSFORMMATRICES);
WRITE(p, "uniform s_"I_LIGHTS" "I_LIGHTS" : register(c%d);\n", C_LIGHTS);
WRITE(p, "uniform s_"I_MATERIALS" "I_MATERIALS" : register(c%d);\n", C_MATERIALS);
WRITE(p, "uniform s_"I_PROJECTION" "I_PROJECTION" : register(c%d);\n", C_PROJECTION);
WRITE(p, "uniform float4 "I_DEPTHPARAMS" : register(c%d);\n", C_DEPTHPARAMS);
WRITE(p, "VS_OUTPUT main(\n");
// inputs
if (components & VB_HAS_NRM0)
WRITE(p, " float3 rawnorm0 : NORMAL0,\n");
if (components & VB_HAS_NRM1) {
if (is_d3d)
WRITE(p, " float3 rawnorm1 : NORMAL1,\n");
else
WRITE(p, " float3 rawnorm1 : ATTR%d,\n", SHADER_NORM1_ATTRIB);
}
if (components & VB_HAS_NRM2) {
if (is_d3d)
WRITE(p, " float3 rawnorm2 : NORMAL2,\n");
else
WRITE(p, " float3 rawnorm2 : ATTR%d,\n", SHADER_NORM2_ATTRIB);
}
if (components & VB_HAS_COL0)
WRITE(p, " float4 color0 : COLOR0,\n");
if (components & VB_HAS_COL1)
WRITE(p, " float4 color1 : COLOR1,\n");
for (int i = 0; i < 8; ++i) {
u32 hastexmtx = (components & (VB_HAS_TEXMTXIDX0<<i));
if ((components & (VB_HAS_UV0<<i)) || hastexmtx)
WRITE(p, " float%d tex%d : TEXCOORD%d,\n", hastexmtx ? 3 : 2, i, i);
}
if (components & VB_HAS_POSMTXIDX) {
if (is_d3d)
{
WRITE(p, " float4 blend_indices : BLENDINDICES,\n");
}
else
WRITE(p, " float fposmtx : ATTR%d,\n", SHADER_POSMTX_ATTRIB);
}
WRITE(p, " float4 rawpos : POSITION) {\n");
WRITE(p, "VS_OUTPUT o;\n");
// transforms
if (components & VB_HAS_POSMTXIDX) {
if (api_type == API_D3D9)
{
WRITE(p, "int4 indices = D3DCOLORtoUBYTE4(blend_indices);\n");
WRITE(p, "int posmtx = indices.x;\n");
}
else if (api_type == API_D3D11)
{
WRITE(p, "int posmtx = blend_indices.x * 255.0f;\n");
}
else
{
WRITE(p, "int posmtx = fposmtx;\n");
}
WRITE(p, "float4 pos = float4(dot("I_TRANSFORMMATRICES".T[posmtx].t, rawpos), dot("I_TRANSFORMMATRICES".T[posmtx+1].t, rawpos), dot("I_TRANSFORMMATRICES".T[posmtx+2].t, rawpos), 1);\n");
if (components & VB_HAS_NRMALL) {
WRITE(p, "int normidx = posmtx >= 32 ? (posmtx-32) : posmtx;\n");
WRITE(p, "float3 N0 = "I_NORMALMATRICES".T[normidx].t.xyz, N1 = "I_NORMALMATRICES".T[normidx+1].t.xyz, N2 = "I_NORMALMATRICES".T[normidx+2].t.xyz;\n");
}
if (components & VB_HAS_NRM0)
WRITE(p, "float3 _norm0 = normalize(float3(dot(N0, rawnorm0), dot(N1, rawnorm0), dot(N2, rawnorm0)));\n");
if (components & VB_HAS_NRM1)
WRITE(p, "float3 _norm1 = float3(dot(N0, rawnorm1), dot(N1, rawnorm1), dot(N2, rawnorm1));\n");
if (components & VB_HAS_NRM2)
WRITE(p, "float3 _norm2 = float3(dot(N0, rawnorm2), dot(N1, rawnorm2), dot(N2, rawnorm2));\n");
}
else
{
WRITE(p, "float4 pos = float4(dot("I_POSNORMALMATRIX".T0, rawpos), dot("I_POSNORMALMATRIX".T1, rawpos), dot("I_POSNORMALMATRIX".T2, rawpos), 1.0f);\n");
if (components & VB_HAS_NRM0)
WRITE(p, "float3 _norm0 = normalize(float3(dot("I_POSNORMALMATRIX".N0.xyz, rawnorm0), dot("I_POSNORMALMATRIX".N1.xyz, rawnorm0), dot("I_POSNORMALMATRIX".N2.xyz, rawnorm0)));\n");
if (components & VB_HAS_NRM1)
WRITE(p, "float3 _norm1 = float3(dot("I_POSNORMALMATRIX".N0.xyz, rawnorm1), dot("I_POSNORMALMATRIX".N1.xyz, rawnorm1), dot("I_POSNORMALMATRIX".N2.xyz, rawnorm1));\n");
if (components & VB_HAS_NRM2)
WRITE(p, "float3 _norm2 = float3(dot("I_POSNORMALMATRIX".N0.xyz, rawnorm2), dot("I_POSNORMALMATRIX".N1.xyz, rawnorm2), dot("I_POSNORMALMATRIX".N2.xyz, rawnorm2));\n");
}
if (!(components & VB_HAS_NRM0))
WRITE(p, "float3 _norm0 = float3(0.0f, 0.0f, 0.0f);\n");
WRITE(p, "o.pos = float4(dot("I_PROJECTION".T0, pos), dot("I_PROJECTION".T1, pos), dot("I_PROJECTION".T2, pos), dot("I_PROJECTION".T3, pos));\n");
WRITE(p, "float4 mat, lacc;\n"
"float3 ldir, h;\n"
"float dist, dist2, attn;\n");
if(xfregs.nNumChans == 0)
{
if (components & VB_HAS_COL0)
WRITE(p, "o.colors_0 = color0;\n");
else
WRITE(p, "o.colors_0 = float4(1.0f, 1.0f, 1.0f, 1.0f);\n");
}
// lights/colors
for (int j = 0; j < xfregs.nNumChans; j++)
{
const LitChannel& color = xfregs.colChans[j].color;
const LitChannel& alpha = xfregs.colChans[j].alpha;
WRITE(p, "{\n");
if (color.matsource) {// from vertex
if (components & (VB_HAS_COL0 << j))
WRITE(p, "mat = color%d;\n", j);
else if (components & VB_HAS_COL0)
WRITE(p, "mat = color0;\n");
else
WRITE(p, "mat = float4(1.0f, 1.0f, 1.0f, 1.0f);\n");
}
else // from color
WRITE(p, "mat = "I_MATERIALS".C%d;\n", j+2);
if (color.enablelighting) {
if (color.ambsource) { // from vertex
if (components & (VB_HAS_COL0<<j) )
WRITE(p, "lacc = color%d;\n", j);
else if (components & VB_HAS_COL0 )
WRITE(p, "lacc = color0;\n");
else
WRITE(p, "lacc = float4(0.0f, 0.0f, 0.0f, 0.0f);\n");
}
else // from color
WRITE(p, "lacc = "I_MATERIALS".C%d;\n", j);
}
else
{
WRITE(p, "lacc = float4(1.0f, 1.0f, 1.0f, 1.0f);\n");
}
// check if alpha is different
if (alpha.matsource != color.matsource) {
if (alpha.matsource) {// from vertex
if (components & (VB_HAS_COL0<<j))
WRITE(p, "mat.w = color%d.w;\n", j);
else if (components & VB_HAS_COL0)
WRITE(p, "mat.w = color0.w;\n");
else WRITE(p, "mat.w = 1.0f;\n");
}
else // from color
WRITE(p, "mat.w = "I_MATERIALS".C%d.w;\n", j+2);
}
if (alpha.enablelighting)
{
if (alpha.ambsource) {// from vertex
if (components & (VB_HAS_COL0<<j) )
WRITE(p, "lacc.w = color%d.w;\n", j);
else if (components & VB_HAS_COL0 )
WRITE(p, "lacc.w = color0.w;\n");
else
WRITE(p, "lacc.w = 0.0f;\n");
}
else // from color
WRITE(p, "lacc.w = "I_MATERIALS".C%d.w;\n", j);
}
else
{
WRITE(p, "lacc.w = 1.0f;\n");
}
if(color.enablelighting && alpha.enablelighting)
{
// both have lighting, test if they use the same lights
int mask = 0;
if(color.lightparams == alpha.lightparams)
{
mask = color.GetFullLightMask() & alpha.GetFullLightMask();
if(mask)
{
for (int i = 0; i < 8; ++i)
{
if (mask & (1<<i))
p = GenerateLightShader(p, i, color, "lacc", 3);
}
}
}
// no shared lights
for (int i = 0; i < 8; ++i)
{
if (!(mask&(1<<i)) && (color.GetFullLightMask() & (1<<i)))
p = GenerateLightShader(p, i, color, "lacc", 1);
if (!(mask&(1<<i)) && (alpha.GetFullLightMask() & (1<<i)))
p = GenerateLightShader(p, i, alpha, "lacc", 2);
}
}
else if (color.enablelighting || alpha.enablelighting)
{
// lights are disabled on one channel so process only the active ones
LitChannel workingchannel = color.enablelighting ? color : alpha;
int coloralpha = color.enablelighting ? 1 : 2;
for (int i = 0; i < 8; ++i)
{
if (workingchannel.GetFullLightMask() & (1<<i))
p = GenerateLightShader(p, i, workingchannel, "lacc", coloralpha);
}
}
WRITE(p, "o.colors_%d = mat * saturate(lacc);\n", j);
WRITE(p, "}\n");
}
if(xfregs.nNumChans < 2)
{
if (components & VB_HAS_COL1)
WRITE(p, "o.colors_1 = color1;\n");
else
WRITE(p, "o.colors_1 = o.colors_0;\n");
}
// special case if only pos and tex coord 0 and tex coord input is AB11
// donko - this has caused problems in some games. removed for now.
bool texGenSpecialCase = false;
/*bool texGenSpecialCase =
((g_VtxDesc.Hex & 0x60600L) == g_VtxDesc.Hex) && // only pos and tex coord 0
(g_VtxDesc.Tex0Coord != NOT_PRESENT) &&
(xfregs.texcoords[0].texmtxinfo.inputform == XF_TEXINPUT_AB11);
*/
// transform texcoords
WRITE(p, "float4 coord = float4(0.0f, 0.0f, 1.0f, 1.0f);\n");
for (int i = 0; i < xfregs.numTexGens; ++i) {
TexMtxInfo& texinfo = xfregs.texcoords[i].texmtxinfo;
WRITE(p, "{\n");
WRITE(p, "coord = float4(0.0f, 0.0f, 1.0f, 1.0f);\n");
switch (texinfo.sourcerow) {
case XF_SRCGEOM_INROW:
_assert_( texinfo.inputform == XF_TEXINPUT_ABC1 );
WRITE(p, "coord = rawpos;\n"); // pos.w is 1
break;
case XF_SRCNORMAL_INROW:
if (components & VB_HAS_NRM0) {
_assert_( texinfo.inputform == XF_TEXINPUT_ABC1 );
WRITE(p, "coord = float4(rawnorm0.xyz, 1.0f);\n");
}
break;
case XF_SRCCOLORS_INROW:
_assert_( texinfo.texgentype == XF_TEXGEN_COLOR_STRGBC0 || texinfo.texgentype == XF_TEXGEN_COLOR_STRGBC1 );
break;
case XF_SRCBINORMAL_T_INROW:
if (components & VB_HAS_NRM1) {
_assert_( texinfo.inputform == XF_TEXINPUT_ABC1 );
WRITE(p, "coord = float4(rawnorm1.xyz, 1.0f);\n");
}
break;
case XF_SRCBINORMAL_B_INROW:
if (components & VB_HAS_NRM2) {
_assert_( texinfo.inputform == XF_TEXINPUT_ABC1 );
WRITE(p, "coord = float4(rawnorm2.xyz, 1.0f);\n");
}
break;
default:
_assert_(texinfo.sourcerow <= XF_SRCTEX7_INROW);
if (components & (VB_HAS_UV0<<(texinfo.sourcerow - XF_SRCTEX0_INROW)) )
WRITE(p, "coord = float4(tex%d.x, tex%d.y, 1.0f, 1.0f);\n", texinfo.sourcerow - XF_SRCTEX0_INROW, texinfo.sourcerow - XF_SRCTEX0_INROW);
break;
}
// first transformation
switch (texinfo.texgentype) {
case XF_TEXGEN_EMBOSS_MAP: // calculate tex coords into bump map
if (components & (VB_HAS_NRM1|VB_HAS_NRM2)) {
// transform the light dir into tangent space
WRITE(p, "ldir = normalize("I_LIGHTS".lights[%d].pos.xyz - pos.xyz);\n", texinfo.embosslightshift);
WRITE(p, "o.tex%d.xyz = o.tex%d.xyz + float3(dot(ldir, _norm1), dot(ldir, _norm2), 0.0f);\n", i, texinfo.embosssourceshift);
}
else
{
_assert_(0); // should have normals
WRITE(p, "o.tex%d.xyz = o.tex%d.xyz;\n", i, texinfo.embosssourceshift);
}
break;
case XF_TEXGEN_COLOR_STRGBC0:
_assert_(texinfo.sourcerow == XF_SRCCOLORS_INROW);
WRITE(p, "o.tex%d.xyz = float3(o.colors_0.x, o.colors_0.y, 1);\n", i);
break;
case XF_TEXGEN_COLOR_STRGBC1:
_assert_(texinfo.sourcerow == XF_SRCCOLORS_INROW);
WRITE(p, "o.tex%d.xyz = float3(o.colors_1.x, o.colors_1.y, 1);\n", i);
break;
case XF_TEXGEN_REGULAR:
default:
if (components & (VB_HAS_TEXMTXIDX0<<i)) {
if (texinfo.projection == XF_TEXPROJ_STQ)
WRITE(p, "o.tex%d.xyz = float3(dot(coord, "I_TRANSFORMMATRICES".T[tex%d.z].t), dot(coord, "I_TRANSFORMMATRICES".T[tex%d.z+1].t), dot(coord, "I_TRANSFORMMATRICES".T[tex%d.z+2].t));\n", i, i, i, i);
else {
WRITE(p, "o.tex%d.xyz = float3(dot(coord, "I_TRANSFORMMATRICES".T[tex%d.z].t), dot(coord, "I_TRANSFORMMATRICES".T[tex%d.z+1].t), 1);\n", i, i, i);
}
}
else {
if (texinfo.projection == XF_TEXPROJ_STQ)
WRITE(p, "o.tex%d.xyz = float3(dot(coord, "I_TEXMATRICES".T[%d].t), dot(coord, "I_TEXMATRICES".T[%d].t), dot(coord, "I_TEXMATRICES".T[%d].t));\n", i, 3*i, 3*i+1, 3*i+2);
else
WRITE(p, "o.tex%d.xyz = float3(dot(coord, "I_TEXMATRICES".T[%d].t), dot(coord, "I_TEXMATRICES".T[%d].t), 1);\n", i, 3*i, 3*i+1);
}
break;
}
if (xfregs.bEnableDualTexTransform && texinfo.texgentype == XF_TEXGEN_REGULAR) { // only works for regular tex gen types?
int postidx = xfregs.texcoords[i].postmtxinfo.index;
WRITE(p, "float4 P0 = "I_POSTTRANSFORMMATRICES".T[%d].t;\n"
"float4 P1 = "I_POSTTRANSFORMMATRICES".T[%d].t;\n"
"float4 P2 = "I_POSTTRANSFORMMATRICES".T[%d].t;\n",
postidx&0x3f, (postidx+1)&0x3f, (postidx+2)&0x3f);
if (texGenSpecialCase) {
// no normalization
// q of input is 1
// q of output is unknown
// multiply by postmatrix
WRITE(p, "o.tex%d.xyz = float3(dot(P0.xy, o.tex%d.xy) + P0.z + P0.w, dot(P1.xy, o.tex%d.xy) + P1.z + P1.w, 0.0f);\n", i, i, i);
}
else
{
if (xfregs.texcoords[i].postmtxinfo.normalize)
WRITE(p, "o.tex%d.xyz = normalize(o.tex%d.xyz);\n", i, i);
// multiply by postmatrix
WRITE(p, "o.tex%d.xyz = float3(dot(P0.xyz, o.tex%d.xyz) + P0.w, dot(P1.xyz, o.tex%d.xyz) + P1.w, dot(P2.xyz, o.tex%d.xyz) + P2.w);\n", i, i, i, i);
}
}
WRITE(p, "}\n");
}
// clipPos/w needs to be done in pixel shader, not here
if (xfregs.numTexGens < 7) {
WRITE(p, "o.clipPos = float4(pos.x,pos.y,o.pos.z,o.pos.w);\n");
} else {
WRITE(p, "o.tex0.w = pos.x;\n");
WRITE(p, "o.tex1.w = pos.y;\n");
WRITE(p, "o.tex2.w = o.pos.z;\n");
WRITE(p, "o.tex3.w = o.pos.w;\n");
}
if(g_ActiveConfig.bEnablePixelLigting && g_ActiveConfig.backend_info.bSupportsPixelLighting)
{
if (xfregs.numTexGens < 7) {
WRITE(p, "o.Normal = float4(_norm0.x,_norm0.y,_norm0.z,pos.z);\n");
} else {
WRITE(p, "o.tex4.w = _norm0.x;\n");
WRITE(p, "o.tex5.w = _norm0.y;\n");
WRITE(p, "o.tex6.w = _norm0.z;\n");
if (xfregs.numTexGens < 8)
WRITE(p, "o.tex7 = pos.xyzz;\n");
else
WRITE(p, "o.tex7.w = pos.z;\n");
}
if (components & VB_HAS_COL0)
WRITE(p, "o.colors_0 = color0;\n");
if (components & VB_HAS_COL1)
WRITE(p, "o.colors_1 = color1;\n");
}
//write the true depth value, if the game uses depth textures pixel shaders will override with the correct values
//if not early z culling will improve speed
if (is_d3d) {
WRITE(p, "o.pos.z = "I_DEPTHPARAMS".x * o.pos.w + o.pos.z * "I_DEPTHPARAMS".y;\n");
} else {
// this results in a scale from -1..0 to -1..1 after perspective
// divide
WRITE(p, "o.pos.z = o.pos.w + o.pos.z * 2.0f;\n");
// Sonic Unleashed puts its final rendering at the near or
// far plane of the viewing frustrum(actually box, they use
// orthogonal projection for that), and we end up putting it
// just beyond, and the rendering gets clipped away. (The
// primitive gets dropped)
WRITE(p, "o.pos.z = o.pos.z * 1048575.0f/1048576.0f;\n");
// the next steps of the OGL pipeline are:
// (x_c,y_c,z_c,w_c) = o.pos //switch to OGL spec terminology
// clipping to -w_c <= (x_c,y_c,z_c) <= w_c
// (x_d,y_d,z_d) = (x_c,y_c,z_c)/w_c//perspective divide
// z_w = (f-n)/2*z_d + (n+f)/2
// z_w now contains the value to go to the 0..1 depth buffer
//trying to get the correct semantic while not using glDepthRange
//seems to get rather complicated
}
WRITE(p, "return o;\n}\n");
if (text[sizeof(text) - 1] != 0x7C)
PanicAlert("VertexShader generator - buffer too small, canary has been eaten!");
setlocale(LC_NUMERIC, ""); // restore locale
return text;
}
// coloralpha - 1 if color, 2 if alpha
char *GenerateLightShader(char *p, int index, const LitChannel& chan, const char *dest, int coloralpha)
{
const char* swizzle = "xyzw";
if (coloralpha == 1 ) swizzle = "xyz";
else if (coloralpha == 2 ) swizzle = "w";
if (!(chan.attnfunc & 1)) {
// atten disabled
switch (chan.diffusefunc) {
case LIGHTDIF_NONE:
WRITE(p, "%s.%s += "I_LIGHTS".lights[%d].col.%s;\n", dest, swizzle, index, swizzle);
break;
case LIGHTDIF_SIGN:
case LIGHTDIF_CLAMP:
WRITE(p, "ldir = normalize("I_LIGHTS".lights[%d].pos.xyz - pos.xyz);\n", index);
WRITE(p, "%s.%s += %sdot(ldir, _norm0)) * "I_LIGHTS".lights[%d].col.%s;\n",
dest, swizzle, chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(", index, swizzle);
break;
default: _assert_(0);
}
}
else { // spec and spot
if (chan.attnfunc == 3)
{ // spot
WRITE(p, "ldir = "I_LIGHTS".lights[%d].pos.xyz - pos.xyz;\n", index);
WRITE(p, "dist2 = dot(ldir, ldir);\n"
"dist = sqrt(dist2);\n"
"ldir = ldir / dist;\n"
"attn = max(0.0f, dot(ldir, "I_LIGHTS".lights[%d].dir.xyz));\n",index);
WRITE(p, "attn = max(0.0f, dot("I_LIGHTS".lights[%d].cosatt.xyz, float3(1.0f, attn, attn*attn))) / dot("I_LIGHTS".lights[%d].distatt.xyz, float3(1.0f,dist,dist2));\n", index, index);
}
else if (chan.attnfunc == 1)
{ // specular
WRITE(p, "ldir = normalize("I_LIGHTS".lights[%d].pos.xyz);\n",index);
WRITE(p, "attn = (dot(_norm0,ldir) >= 0.0f) ? max(0.0f, dot(_norm0, "I_LIGHTS".lights[%d].dir.xyz)) : 0.0f;\n", index);
WRITE(p, "attn = max(0.0f, dot("I_LIGHTS".lights[%d].cosatt.xyz, float3(1,attn,attn*attn))) / dot("I_LIGHTS".lights[%d].distatt.xyz, float3(1,attn,attn*attn));\n", index, index);
}
switch (chan.diffusefunc)
{
case LIGHTDIF_NONE:
WRITE(p, "%s.%s += attn * "I_LIGHTS".lights[%d].col.%s;\n", dest, swizzle, index, swizzle);
break;
case LIGHTDIF_SIGN:
case LIGHTDIF_CLAMP:
WRITE(p, "%s.%s += attn * %sdot(ldir, _norm0)) * "I_LIGHTS".lights[%d].col.%s;\n",
dest,
swizzle,
chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(",
index,
swizzle);
break;
default: _assert_(0);
}
}
WRITE(p, "\n");
return p;
}
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