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ppsspp/GPU/Common/FragmentShaderGenerator.cpp
Henrik Rydgård d32fc34b2b Remove inPrefix. HLSL shaders gets slightly longer but probably no biggie. 
The extra variable should be optimized out anyway.

Tried doing it with the preprocessor, couldn't get it to work.
2020-10-31 23:22:06 +01:00

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// Copyright (c) 2012- PPSSPP 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 or later versions.
// 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 git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <cstdio>
#include <sstream>
#include "Common/Log.h"
#include "Common/StringUtils.h"
#include "Common/GPU/OpenGL/GLFeatures.h"
#include "Core/Reporting.h"
#include "Core/Config.h"
#include "GPU/Common/GPUStateUtils.h"
#include "GPU/Common/ShaderId.h"
#include "GPU/Common/ShaderUniforms.h"
#include "GPU/Common/FragmentShaderGenerator.h"
#include "GPU/ge_constants.h"
#include "GPU/GPUState.h"
#define WRITE p+=sprintf
const char *vulkan_glsl_preamble_fs =
"#version 450\n"
"#extension GL_ARB_separate_shader_objects : enable\n"
"#extension GL_ARB_shading_language_420pack : enable\n"
"#extension GL_ARB_conservative_depth : enable\n"
"#extension GL_ARB_shader_image_load_store : enable\n"
"#define splat3(x) vec3(x)\n"
"#define lowp\n"
"#define mediump\n"
"#define highp\n"
"#define DISCARD discard\n"
"\n";
const char *hlsl_preamble_fs =
"#define vec2 float2\n"
"#define vec3 float3\n"
"#define vec4 float4\n"
"#define uvec3 uint3\n"
"#define ivec3 int3\n"
"#define splat3(x) float3(x, x, x)\n"
"#define mix lerp\n"
"#define mod(x, y) fmod(x, y)\n";
const char *hlsl_d3d11_preamble_fs =
"#define DISCARD discard\n"
"#define DISCARD_BELOW(x) clip(x);\n";
const char *hlsl_d3d9_preamble_fs =
"#define DISCARD clip(-1)\n"
"#define DISCARD_BELOW(x) clip(x)\n";
bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLanguageDesc &compat, uint64_t *uniformMask, std::string *errorString) {
*uniformMask = 0;
errorString->clear();
bool highpFog = false;
bool highpTexcoord = false;
bool enableFragmentTestCache = g_Config.bFragmentTestCache && ShaderLanguageIsOpenGL(compat.shaderLanguage);
if (compat.gles) {
// PowerVR needs highp to do the fog in MHU correctly.
// Others don't, and some can't handle highp in the fragment shader.
highpFog = (gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_BAD) ? true : false;
highpTexcoord = highpFog;
}
ReplaceAlphaType stencilToAlpha = static_cast<ReplaceAlphaType>(id.Bits(FS_BIT_STENCIL_TO_ALPHA, 2));
char *p = buffer;
switch (compat.shaderLanguage) {
case ShaderLanguage::GLSL_VULKAN:
WRITE(p, "%s", vulkan_glsl_preamble_fs);
break;
case ShaderLanguage::HLSL_D3D11:
WRITE(p, "%s", hlsl_preamble_fs);
WRITE(p, "%s", hlsl_d3d11_preamble_fs);
break;
case ShaderLanguage::HLSL_D3D9:
WRITE(p, "%s", hlsl_preamble_fs);
WRITE(p, "%s", hlsl_d3d9_preamble_fs);
break;
default:
// OpenGL
WRITE(p, "#version %d%s\n", compat.glslVersionNumber, compat.gles ? " es" : "");
WRITE(p, "#define DISCARD discard\n");
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE && gl_extensions.EXT_blend_func_extended) {
WRITE(p, "#extension GL_EXT_blend_func_extended : require\n");
}
if (gl_extensions.EXT_gpu_shader4) {
WRITE(p, "#extension GL_EXT_gpu_shader4 : enable\n");
}
if (compat.framebufferFetchExtension) {
WRITE(p, "%s\n", compat.framebufferFetchExtension);
}
if (!compat.gles) {
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
} else {
WRITE(p, "precision lowp float;\n");
}
WRITE(p, "#define splat3(x) vec3(x)\n");
}
bool lmode = id.Bit(FS_BIT_LMODE);
bool doTexture = id.Bit(FS_BIT_DO_TEXTURE);
bool enableFog = id.Bit(FS_BIT_ENABLE_FOG);
bool enableAlphaTest = id.Bit(FS_BIT_ALPHA_TEST);
bool alphaTestAgainstZero = id.Bit(FS_BIT_ALPHA_AGAINST_ZERO);
bool testForceToZero = id.Bit(FS_BIT_TEST_DISCARD_TO_ZERO);
bool enableColorTest = id.Bit(FS_BIT_COLOR_TEST);
bool colorTestAgainstZero = id.Bit(FS_BIT_COLOR_AGAINST_ZERO);
bool enableColorDoubling = id.Bit(FS_BIT_COLOR_DOUBLE);
bool doTextureProjection = id.Bit(FS_BIT_DO_TEXTURE_PROJ);
bool doTextureAlpha = id.Bit(FS_BIT_TEXALPHA);
bool doFlatShading = id.Bit(FS_BIT_FLATSHADE);
bool shaderDepal = id.Bit(FS_BIT_SHADER_DEPAL);
bool bgraTexture = id.Bit(FS_BIT_BGRA_TEXTURE);
GEComparison alphaTestFunc = (GEComparison)id.Bits(FS_BIT_ALPHA_TEST_FUNC, 3);
GEComparison colorTestFunc = (GEComparison)id.Bits(FS_BIT_COLOR_TEST_FUNC, 2);
bool needShaderTexClamp = id.Bit(FS_BIT_SHADER_TEX_CLAMP);
GETexFunc texFunc = (GETexFunc)id.Bits(FS_BIT_TEXFUNC, 3);
bool textureAtOffset = id.Bit(FS_BIT_TEXTURE_AT_OFFSET);
ReplaceBlendType replaceBlend = static_cast<ReplaceBlendType>(id.Bits(FS_BIT_REPLACE_BLEND, 3));
GEBlendSrcFactor replaceBlendFuncA = (GEBlendSrcFactor)id.Bits(FS_BIT_BLENDFUNC_A, 4);
GEBlendDstFactor replaceBlendFuncB = (GEBlendDstFactor)id.Bits(FS_BIT_BLENDFUNC_B, 4);
GEBlendMode replaceBlendEq = (GEBlendMode)id.Bits(FS_BIT_BLENDEQ, 3);
StencilValueType replaceAlphaWithStencilType = (StencilValueType)id.Bits(FS_BIT_REPLACE_ALPHA_WITH_STENCIL_TYPE, 4);
bool isModeClear = id.Bit(FS_BIT_CLEARMODE);
const char *shading = "";
if (compat.glslES30 || compat.shaderLanguage == ShaderLanguage::GLSL_VULKAN)
shading = doFlatShading ? "flat" : "";
bool earlyFragmentTests = ((!enableAlphaTest && !enableColorTest) || testForceToZero) && !gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT);
bool useAdrenoBugWorkaround = id.Bit(FS_BIT_NO_DEPTH_CANNOT_DISCARD_STENCIL);
if (compat.shaderLanguage == ShaderLanguage::GLSL_VULKAN) {
if (earlyFragmentTests) {
WRITE(p, "layout (early_fragment_tests) in;\n");
} else if (useAdrenoBugWorkaround && !gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT)) {
WRITE(p, "layout (depth_unchanged) out float gl_FragDepth;\n");
}
WRITE(p, "layout (std140, set = 0, binding = 3) uniform baseUBO {\n%s};\n", ub_baseStr);
if (doTexture) {
WRITE(p, "layout (binding = 0) uniform sampler2D tex;\n");
}
if (!isModeClear && replaceBlend > REPLACE_BLEND_STANDARD) {
if (replaceBlend == REPLACE_BLEND_COPY_FBO) {
WRITE(p, "layout (binding = 1) uniform sampler2D fbotex;\n");
}
}
if (shaderDepal) {
WRITE(p, "layout (binding = 2) uniform sampler2D pal;\n");
}
WRITE(p, "layout (location = 1) %s in vec4 v_color0;\n", shading);
if (lmode)
WRITE(p, "layout (location = 2) %s in vec3 v_color1;\n", shading);
if (enableFog) {
WRITE(p, "layout (location = 3) in float v_fogdepth;\n");
}
if (doTexture) {
WRITE(p, "layout (location = 0) in vec3 v_texcoord;\n");
}
if (enableAlphaTest && !alphaTestAgainstZero) {
WRITE(p, "int roundAndScaleTo255i(in float x) { return int(floor(x * 255.0 + 0.5)); }\n");
}
if (enableColorTest && !colorTestAgainstZero) {
WRITE(p, "ivec3 roundAndScaleTo255iv(in vec3 x) { return ivec3(floor(x * 255.0 + 0.5)); }\n");
}
WRITE(p, "layout (location = 0, index = 0) out vec4 fragColor0;\n");
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE) {
WRITE(p, "layout (location = 0, index = 1) out vec4 fragColor1;\n");
}
} else if (compat.shaderLanguage == HLSL_D3D11 || compat.shaderLanguage == HLSL_D3D9) {
if (compat.shaderLanguage == HLSL_D3D9) {
if (doTexture)
WRITE(p, "sampler tex : register(s0);\n");
if (!isModeClear && replaceBlend > REPLACE_BLEND_STANDARD) {
if (replaceBlend == REPLACE_BLEND_COPY_FBO) {
WRITE(p, "vec2 u_fbotexSize : register(c%i);\n", CONST_PS_FBOTEXSIZE);
WRITE(p, "sampler fbotex : register(s1);\n");
}
if (replaceBlendFuncA >= GE_SRCBLEND_FIXA) {
WRITE(p, "float3 u_blendFixA : register(c%i);\n", CONST_PS_BLENDFIXA);
}
if (replaceBlendFuncB >= GE_DSTBLEND_FIXB) {
WRITE(p, "float3 u_blendFixB : register(c%i);\n", CONST_PS_BLENDFIXB);
}
}
if (needShaderTexClamp && doTexture) {
WRITE(p, "vec4 u_texclamp : register(c%i);\n", CONST_PS_TEXCLAMP);
if (textureAtOffset) {
WRITE(p, "vec2 u_texclampoff : register(c%i);\n", CONST_PS_TEXCLAMPOFF);
}
}
if (enableAlphaTest || enableColorTest) {
WRITE(p, "vec4 u_alphacolorref : register(c%i);\n", CONST_PS_ALPHACOLORREF);
WRITE(p, "vec4 u_alphacolormask : register(c%i);\n", CONST_PS_ALPHACOLORMASK);
}
if (stencilToAlpha && replaceAlphaWithStencilType == STENCIL_VALUE_UNIFORM) {
WRITE(p, "float u_stencilReplaceValue : register(c%i);\n", CONST_PS_STENCILREPLACE);
}
if (doTexture && texFunc == GE_TEXFUNC_BLEND) {
WRITE(p, "float3 u_texenv : register(c%i);\n", CONST_PS_TEXENV);
}
if (enableFog) {
WRITE(p, "float3 u_fogcolor : register(c%i);\n", CONST_PS_FOGCOLOR);
}
} else {
WRITE(p, "SamplerState samp : register(s0);\n");
WRITE(p, "Texture2D<vec4> tex : register(t0);\n");
if (!isModeClear && replaceBlend > REPLACE_BLEND_STANDARD) {
if (replaceBlend == REPLACE_BLEND_COPY_FBO) {
// No sampler required, we Load
WRITE(p, "Texture2D<vec4> fboTex : register(t1);\n");
}
}
WRITE(p, "cbuffer base : register(b0) {\n%s};\n", cb_baseStr);
}
if (enableAlphaTest) {
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, "int roundAndScaleTo255i(float x) { return int(floor(x * 255.0f + 0.5f)); }\n");
} else {
// D3D11 level 9 gets to take this path.
WRITE(p, "float roundAndScaleTo255f(float x) { return floor(x * 255.0f + 0.5f); }\n");
}
}
if (enableColorTest) {
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, "uvec3 roundAndScaleTo255iv(float3 x) { return uvec3(floor(x * 255.0f + 0.5f)); }\n");
} else {
WRITE(p, "vec3 roundAndScaleTo255v(float3 x) { return floor(x * 255.0f + 0.5f); }\n");
}
}
WRITE(p, "struct PS_IN {\n");
if (doTexture) {
WRITE(p, " vec3 v_texcoord: TEXCOORD0;\n");
}
const char *colorInterpolation = doFlatShading && compat.shaderLanguage == HLSL_D3D11 ? "nointerpolation " : "";
WRITE(p, " %svec4 v_color0: COLOR0;\n", colorInterpolation);
if (lmode) {
WRITE(p, " vec3 v_color1: COLOR1;\n");
}
if (enableFog) {
WRITE(p, " float v_fogdepth: TEXCOORD1;\n");
}
if (compat.shaderLanguage == HLSL_D3D11 && ((replaceBlend == REPLACE_BLEND_COPY_FBO) || gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT))) {
WRITE(p, " vec4 pixelPos : SV_POSITION;\n");
}
WRITE(p, "};\n");
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, "struct PS_OUT {\n");
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE) {
WRITE(p, " vec4 target : SV_Target0;\n");
WRITE(p, " vec4 target1 : SV_Target1;\n");
} else {
WRITE(p, " vec4 target : SV_Target;\n");
}
if (gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT)) {
WRITE(p, " float depth : SV_DEPTH;\n");
}
WRITE(p, "};\n");
}
} else if (compat.shaderLanguage == HLSL_D3D9) {
if (doTexture)
WRITE(p, "sampler tex : register(s0);\n");
if (!isModeClear && replaceBlend > REPLACE_BLEND_STANDARD) {
if (replaceBlend == REPLACE_BLEND_COPY_FBO) {
WRITE(p, "vec2 u_fbotexSize : register(c%i);\n", CONST_PS_FBOTEXSIZE);
WRITE(p, "sampler fbotex : register(s1);\n");
}
if (replaceBlendFuncA >= GE_SRCBLEND_FIXA) {
WRITE(p, "float3 u_blendFixA : register(c%i);\n", CONST_PS_BLENDFIXA);
}
if (replaceBlendFuncB >= GE_DSTBLEND_FIXB) {
WRITE(p, "float3 u_blendFixB : register(c%i);\n", CONST_PS_BLENDFIXB);
}
}
if (needShaderTexClamp && doTexture) {
WRITE(p, "vec4 u_texclamp : register(c%i);\n", CONST_PS_TEXCLAMP);
if (textureAtOffset) {
WRITE(p, "vec2 u_texclampoff : register(c%i);\n", CONST_PS_TEXCLAMPOFF);
}
}
if (enableAlphaTest || enableColorTest) {
WRITE(p, "vec4 u_alphacolorref : register(c%i);\n", CONST_PS_ALPHACOLORREF);
WRITE(p, "vec4 u_alphacolormask : register(c%i);\n", CONST_PS_ALPHACOLORMASK);
}
if (stencilToAlpha && replaceAlphaWithStencilType == STENCIL_VALUE_UNIFORM) {
WRITE(p, "float u_stencilReplaceValue : register(c%i);\n", CONST_PS_STENCILREPLACE);
}
if (doTexture && texFunc == GE_TEXFUNC_BLEND) {
WRITE(p, "float3 u_texenv : register(c%i);\n", CONST_PS_TEXENV);
}
if (enableFog) {
WRITE(p, "float3 u_fogcolor : register(c%i);\n", CONST_PS_FOGCOLOR);
}
} else if (ShaderLanguageIsOpenGL(compat.shaderLanguage)) {
if (shaderDepal && gl_extensions.IsGLES) {
WRITE(p, "precision highp int;\n");
}
if (doTexture)
WRITE(p, "uniform sampler2D tex;\n");
if (!isModeClear && replaceBlend > REPLACE_BLEND_STANDARD) {
*uniformMask |= DIRTY_SHADERBLEND;
if (!gstate_c.Supports(GPU_SUPPORTS_ANY_FRAMEBUFFER_FETCH) && replaceBlend == REPLACE_BLEND_COPY_FBO) {
if (!compat.texelFetch) {
WRITE(p, "uniform vec2 u_fbotexSize;\n");
}
WRITE(p, "uniform sampler2D fbotex;\n");
}
if (replaceBlendFuncA >= GE_SRCBLEND_FIXA) {
WRITE(p, "uniform vec3 u_blendFixA;\n");
}
if (replaceBlendFuncB >= GE_DSTBLEND_FIXB) {
WRITE(p, "uniform vec3 u_blendFixB;\n");
}
}
if (needShaderTexClamp && doTexture) {
*uniformMask |= DIRTY_TEXCLAMP;
WRITE(p, "uniform vec4 u_texclamp;\n");
if (id.Bit(FS_BIT_TEXTURE_AT_OFFSET)) {
WRITE(p, "uniform vec2 u_texclampoff;\n");
}
}
if (enableAlphaTest || enableColorTest) {
if (enableFragmentTestCache) {
WRITE(p, "uniform sampler2D testtex;\n");
} else {
*uniformMask |= DIRTY_ALPHACOLORREF;
WRITE(p, "uniform vec4 u_alphacolorref;\n");
if (compat.bitwiseOps && ((enableColorTest && !colorTestAgainstZero) || (enableAlphaTest && !alphaTestAgainstZero))) {
*uniformMask |= DIRTY_ALPHACOLORMASK;
WRITE(p, "uniform ivec4 u_alphacolormask;\n");
}
}
}
if (shaderDepal) {
WRITE(p, "uniform sampler2D pal;\n");
WRITE(p, "uniform int u_depal_mask_shift_off_fmt;\n");
*uniformMask |= DIRTY_DEPAL;
}
if (stencilToAlpha && replaceAlphaWithStencilType == STENCIL_VALUE_UNIFORM) {
*uniformMask |= DIRTY_STENCILREPLACEVALUE;
WRITE(p, "uniform float u_stencilReplaceValue;\n");
}
if (doTexture && texFunc == GE_TEXFUNC_BLEND) {
*uniformMask |= DIRTY_TEXENV;
WRITE(p, "uniform vec3 u_texenv;\n");
}
WRITE(p, "%s %s vec4 v_color0;\n", shading, compat.varying_fs);
if (lmode)
WRITE(p, "%s %s vec3 v_color1;\n", shading, compat.varying_fs);
if (enableFog) {
*uniformMask |= DIRTY_FOGCOLOR;
WRITE(p, "uniform vec3 u_fogcolor;\n");
WRITE(p, "%s %s float v_fogdepth;\n", compat.varying_fs, highpFog ? "highp" : "mediump");
}
if (doTexture) {
WRITE(p, "%s %s vec3 v_texcoord;\n", compat.varying_fs, highpTexcoord ? "highp" : "mediump");
}
if (!enableFragmentTestCache) {
if (enableAlphaTest && !alphaTestAgainstZero) {
if (compat.bitwiseOps) {
WRITE(p, "int roundAndScaleTo255i(in float x) { return int(floor(x * 255.0 + 0.5)); }\n");
} else if (gl_extensions.gpuVendor == GPU_VENDOR_IMGTEC) {
WRITE(p, "float roundTo255thf(in mediump float x) { mediump float y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
} else {
WRITE(p, "float roundAndScaleTo255f(in float x) { return floor(x * 255.0 + 0.5); }\n");
}
}
if (enableColorTest && !colorTestAgainstZero) {
if (compat.bitwiseOps) {
WRITE(p, "ivec3 roundAndScaleTo255iv(in vec3 x) { return ivec3(floor(x * 255.0 + 0.5)); }\n");
} else if (gl_extensions.gpuVendor == GPU_VENDOR_IMGTEC) {
WRITE(p, "vec3 roundTo255thv(in vec3 x) { vec3 y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
} else {
WRITE(p, "vec3 roundAndScaleTo255v(in vec3 x) { return floor(x * 255.0 + 0.5); }\n");
}
}
}
if (!strcmp(compat.fragColor0, "fragColor0")) {
const char *qualifierColor0 = "out";
if (compat.lastFragData && !strcmp(compat.lastFragData, compat.fragColor0)) {
qualifierColor0 = "inout";
}
// Output the output color definitions.
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE) {
WRITE(p, "%s vec4 fragColor0;\n", qualifierColor0);
WRITE(p, "out vec4 fragColor1;\n");
} else {
WRITE(p, "%s vec4 fragColor0;\n", qualifierColor0);
}
}
}
// PowerVR needs a custom modulo function. For some reason, this has far higher precision than the builtin one.
if ((gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_BAD) && needShaderTexClamp) {
WRITE(p, "float mymod(float a, float b) { return a - b * floor(a / b); }\n");
}
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, "PS_OUT main( PS_IN In ) {\n");
WRITE(p, " PS_OUT outfragment;\n");
} else if (compat.shaderLanguage == HLSL_D3D9) {
WRITE(p, "vec4 main( PS_IN In ) : COLOR {\n");
} else {
WRITE(p, "void main() {\n");
}
if (compat.shaderLanguage == HLSL_D3D11 || compat.shaderLanguage == HLSL_D3D9) {
WRITE(p, " vec4 v_color0 = In.v_color0;\n");
if (lmode)
WRITE(p, " vec3 v_color1 = In.v_color1;\n");
if (enableFog) {
WRITE(p, " float v_fogdepth = In.v_fogdepth;\n");
}
if (doTexture) {
WRITE(p, " vec3 v_texcoord = In.v_texcoord;\n");
}
}
if (isModeClear) {
// Clear mode does not allow any fancy shading.
WRITE(p, " vec4 v = v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " vec4 s = vec4(v_color1, 0.0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (doTexture) {
char texcoord[64] = "v_texcoord";
// TODO: Not sure the right way to do this for projection.
// This path destroys resolution on older PowerVR no matter what I do if projection is needed,
// so we disable it on SGX 540 and lesser, and live with the consequences.
bool terriblePrecision = (gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_TERRIBLE) != 0;
bool clampDisabled = doTextureProjection && terriblePrecision;
// Also with terrible precision we can't do wrapping without destroying the image. See #9189
if (terriblePrecision && (!id.Bit(FS_BIT_CLAMP_S) || !id.Bit(FS_BIT_CLAMP_T))) {
clampDisabled = true;
}
if (needShaderTexClamp && !clampDisabled) {
// We may be clamping inside a larger surface (tex = 64x64, buffer=480x272).
// We may also be wrapping in such a surface, or either one in a too-small surface.
// Obviously, clamping to a smaller surface won't work. But better to clamp to something.
std::string ucoord = "v_texcoord.x";
std::string vcoord = "v_texcoord.y";
if (doTextureProjection) {
ucoord = "(v_texcoord.x / v_texcoord.z)";
vcoord = "(v_texcoord.y / v_texcoord.z)";
}
std::string modulo = (gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_BAD) ? "mymod" : "mod";
if (id.Bit(FS_BIT_CLAMP_S)) {
ucoord = "clamp(" + ucoord + ", u_texclamp.z, u_texclamp.x - u_texclamp.z)";
} else {
ucoord = modulo + "(" + ucoord + ", u_texclamp.x)";
}
if (id.Bit(FS_BIT_CLAMP_T)) {
vcoord = "clamp(" + vcoord + ", u_texclamp.w, u_texclamp.y - u_texclamp.w)";
} else {
vcoord = modulo + "(" + vcoord + ", u_texclamp.y)";
}
if (textureAtOffset) {
ucoord = "(" + ucoord + " + u_texclampoff.x)";
vcoord = "(" + vcoord + " + u_texclampoff.y)";
}
WRITE(p, " vec2 fixedcoord = vec2(%s, %s);\n", ucoord.c_str(), vcoord.c_str());
truncate_cpy(texcoord, "fixedcoord");
// We already projected it.
doTextureProjection = false;
}
if (!shaderDepal) {
if (compat.shaderLanguage == HLSL_D3D11) {
if (doTextureProjection) {
WRITE(p, " vec4 t = tex.Sample(samp, v_texcoord.xy / v_texcoord.z)%s;\n", bgraTexture ? ".bgra" : "");
} else {
WRITE(p, " vec4 t = tex.Sample(samp, %s.xy)%s;\n", texcoord, bgraTexture ? ".bgra" : "");
}
} else if (compat.shaderLanguage == HLSL_D3D9) {
if (doTextureProjection) {
WRITE(p, " vec4 t = tex2Dproj(tex, vec4(v_texcoord.x, v_texcoord.y, 0, v_texcoord.z))%s;\n", bgraTexture ? ".bgra" : "");
} else {
WRITE(p, " vec4 t = tex2D(tex, %s.xy)%s;\n", texcoord, bgraTexture ? ".bgra" : "");
}
} else {
if (doTextureProjection) {
WRITE(p, " vec4 t = %sProj(tex, %s);\n", compat.texture, texcoord);
} else {
WRITE(p, " vec4 t = %s(tex, %s.xy);\n", compat.texture, texcoord);
}
}
} else {
if (doTextureProjection) {
// We don't use textureProj because we need better control and it's probably not much of a savings anyway.
// However it is good for precision on older hardware like PowerVR.
WRITE(p, " vec2 uv = %s.xy/%s.z;\n vec2 uv_round;\n", texcoord, texcoord);
} else {
WRITE(p, " vec2 uv = %s.xy;\n vec2 uv_round;\n", texcoord);
}
WRITE(p, " vec2 tsize = vec2(textureSize(tex, 0));\n");
WRITE(p, " vec2 fraction;\n");
WRITE(p, " bool bilinear = (u_depal_mask_shift_off_fmt >> 31) != 0;\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " uv_round = uv * tsize - vec2(0.5, 0.5);\n");
WRITE(p, " fraction = fract(uv_round);\n");
WRITE(p, " uv_round = (uv_round - fraction + vec2(0.5, 0.5)) / tsize;\n"); // We want to take our four point samples at pixel centers.
WRITE(p, " } else {\n");
WRITE(p, " uv_round = uv;\n");
WRITE(p, " }\n");
WRITE(p, " vec4 t = %s(tex, uv_round);\n", compat.texture);
WRITE(p, " vec4 t1 = %sOffset(tex, uv_round, ivec2(1, 0));\n", compat.texture);
WRITE(p, " vec4 t2 = %sOffset(tex, uv_round, ivec2(0, 1));\n", compat.texture);
WRITE(p, " vec4 t3 = %sOffset(tex, uv_round, ivec2(1, 1));\n", compat.texture);
WRITE(p, " uint depalMask = (u_depal_mask_shift_off_fmt & 0xFF);\n");
WRITE(p, " uint depalShift = (u_depal_mask_shift_off_fmt >> 8) & 0xFF;\n");
WRITE(p, " uint depalOffset = ((u_depal_mask_shift_off_fmt >> 16) & 0xFF) << 4;\n");
WRITE(p, " uint depalFmt = (u_depal_mask_shift_off_fmt >> 24) & 0x3;\n");
WRITE(p, " uvec4 col; uint index0; uint index1; uint index2; uint index3;\n");
WRITE(p, " switch (depalFmt) {\n"); // We might want to include fmt in the shader ID if this is a performance issue.
WRITE(p, " case 0:\n"); // 565
WRITE(p, " col = uvec4(t.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index0 = (col.b << 11) | (col.g << 5) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index1 = (col.b << 11) | (col.g << 5) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index2 = (col.b << 11) | (col.g << 5) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index3 = (col.b << 11) | (col.g << 5) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 1:\n"); // 5551
WRITE(p, " col = uvec4(t.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index0 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index1 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index2 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index3 = (col.a << 15) | (col.b << 10) | (col.g << 5) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 2:\n"); // 4444
WRITE(p, " col = uvec4(t.rgba * 15.99);\n");
WRITE(p, " index0 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 15.99);\n");
WRITE(p, " index1 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 15.99);\n");
WRITE(p, " index2 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 15.99);\n");
WRITE(p, " index3 = (col.a << 12) | (col.b << 8) | (col.g << 4) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 3:\n"); // 8888
WRITE(p, " col = uvec4(t.rgba * 255.99);\n");
WRITE(p, " index0 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 255.99);\n");
WRITE(p, " index1 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 255.99);\n");
WRITE(p, " index2 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 255.99);\n");
WRITE(p, " index3 = (col.a << 24) | (col.b << 16) | (col.g << 8) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " };\n");
WRITE(p, " index0 = ((index0 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " t = texelFetch(pal, ivec2(index0, 0), 0);\n");
WRITE(p, " if (bilinear && !(index0 == index1 && index1 == index2 && index2 == index3)) {\n");
WRITE(p, " index1 = ((index1 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " index2 = ((index2 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " index3 = ((index3 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " t1 = texelFetch(pal, ivec2(index1, 0), 0);\n");
WRITE(p, " t2 = texelFetch(pal, ivec2(index2, 0), 0);\n");
WRITE(p, " t3 = texelFetch(pal, ivec2(index3, 0), 0);\n");
WRITE(p, " t = mix(t, t1, fraction.x);\n");
WRITE(p, " t2 = mix(t2, t3, fraction.x);\n");
WRITE(p, " t = mix(t, t2, fraction.y);\n");
WRITE(p, " }\n");
}
if (texFunc != GE_TEXFUNC_REPLACE || !doTextureAlpha)
WRITE(p, " vec4 p = v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (texFunc) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = p * t%s;\n", secondary);
break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary);
break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = t%s;\n", secondary);
break;
case GE_TEXFUNC_ADD:
case GE_TEXFUNC_UNKNOWN1:
case GE_TEXFUNC_UNKNOWN2:
case GE_TEXFUNC_UNKNOWN3:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a * t.a)%s;\n", secondary);
break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (texFunc) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = vec4(t.rgb * p.rgb, p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_ADD:
case GE_TEXFUNC_UNKNOWN1:
case GE_TEXFUNC_UNKNOWN2:
case GE_TEXFUNC_UNKNOWN3:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a)%s;\n", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
}
if (enableColorDoubling) {
// This happens before fog is applied.
WRITE(p, " v.rgb = clamp(v.rgb * 2.0, 0.0, 1.0);\n");
}
} else {
// No texture mapping
WRITE(p, " vec4 v = v_color0 %s;\n", secondary);
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(v_fogdepth, 0.0, 1.0);\n");
WRITE(p, " v = mix(vec4(u_fogcolor, v.a), v, fogCoef);\n");
}
// Texture access is at half texels [0.5/256, 255.5/256], but colors are normalized [0, 255].
// So we have to scale to account for the difference.
char alphaTestXCoord[64] = "0";
if (enableFragmentTestCache) {
if (enableColorTest && !colorTestAgainstZero) {
WRITE(p, " vec4 vScale256 = v * %f + %f;\n", 255.0 / 256.0, 0.5 / 256.0);
truncate_cpy(alphaTestXCoord, "vScale256.a");
} else if (enableAlphaTest && !alphaTestAgainstZero) {
snprintf(alphaTestXCoord, sizeof(alphaTestXCoord), "v.a * %f + %f", 255.0 / 256.0, 0.5 / 256.0);
}
}
const char *discardStatement = testForceToZero ? "v.a = 0.0;" : "DISCARD;";
if (enableAlphaTest) {
if (alphaTestAgainstZero) {
// When testing against 0 (extremely common), we can avoid some math.
// 0.002 is approximately half of 1.0 / 255.0.
if (alphaTestFunc == GE_COMP_NOTEQUAL || alphaTestFunc == GE_COMP_GREATER) {
WRITE(p, " if (v.a < 0.002) %s\n", discardStatement);
} else if (alphaTestFunc != GE_COMP_NEVER) {
// Anything else is a test for == 0. Happens sometimes, actually...
WRITE(p, " if (v.a > 0.002) %s\n", discardStatement);
} else {
// NEVER has been logged as used by games, although it makes little sense - statically failing.
// Maybe we could discard the drawcall, but it's pretty rare. Let's just statically discard here.
WRITE(p, " %s\n", discardStatement);
}
} else if (enableFragmentTestCache) {
WRITE(p, " float aResult = %s(testtex, vec2(%s, 0)).a;\n", compat.texture, alphaTestXCoord);
WRITE(p, " if (aResult < 0.5) %s\n", discardStatement);
} else {
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " };
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
if (compat.bitwiseOps) {
WRITE(p, " if ((roundAndScaleTo255i(v.a) & u_alphacolormask.a) %s int(u_alphacolorref.a)) %s\n", alphaTestFuncs[alphaTestFunc], discardStatement);
} else if (gl_extensions.gpuVendor == GPU_VENDOR_IMGTEC) {
// Work around bad PVR driver problem where equality check + discard just doesn't work.
if (alphaTestFunc != GE_COMP_NOTEQUAL) {
WRITE(p, " if (roundTo255thf(v.a) %s u_alphacolorref.a) %s\n", alphaTestFuncs[alphaTestFunc], discardStatement);
}
} else {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) %s\n", alphaTestFuncs[alphaTestFunc], discardStatement);
}
} else {
// This means NEVER. See above.
WRITE(p, " %s\n", discardStatement);
}
}
}
if (enableColorTest) {
if (colorTestAgainstZero) {
// When testing against 0 (common), we can avoid some math.
// 0.002 is approximately half of 1.0 / 255.0.
if (colorTestFunc == GE_COMP_NOTEQUAL) {
WRITE(p, " if (v.r < 0.002 && v.g < 0.002 && v.b < 0.002) %s\n", discardStatement);
} else if (colorTestFunc != GE_COMP_NEVER) {
// Anything else is a test for == 0.
WRITE(p, " if (v.r > 0.002 || v.g > 0.002 || v.b > 0.002) %s\n", discardStatement);
} else {
// NEVER has been logged as used by games, although it makes little sense - statically failing.
// Maybe we could discard the drawcall, but it's pretty rare. Let's just statically discard here.
WRITE(p, " %s\n", discardStatement);
}
} else if (enableFragmentTestCache) {
WRITE(p, " float rResult = %s(testtex, vec2(vScale256.r, 0)).r;\n", compat.texture);
WRITE(p, " float gResult = %s(testtex, vec2(vScale256.g, 0)).g;\n", compat.texture);
WRITE(p, " float bResult = %s(testtex, vec2(vScale256.b, 0)).b;\n", compat.texture);
if (colorTestFunc == GE_COMP_EQUAL) {
// Equal means all parts must be equal (so discard if any is not.)
WRITE(p, " if (rResult < 0.5 || gResult < 0.5 || bResult < 0.5) %s\n", discardStatement);
} else {
// Not equal means any part must be not equal.
WRITE(p, " if (rResult < 0.5 && gResult < 0.5 && bResult < 0.5) %s\n", discardStatement);
}
} else {
const char *colorTestFuncs[] = { "#", "#", " != ", " == " };
if (colorTestFuncs[colorTestFunc][0] != '#') {
// TODO: Unify these paths better.
if (compat.shaderLanguage == HLSL_D3D11) {
const char *test = colorTestFuncs[colorTestFunc];
WRITE(p, " uvec3 v_scaled = roundAndScaleTo255iv(v.rgb);\n");
WRITE(p, " uvec3 v_masked = v_scaled & u_alphacolormask.rgb;\n");
WRITE(p, " uvec3 colorTestRef = u_alphacolorref.rgb & u_alphacolormask.rgb;\n");
// We have to test the components separately, or we get incorrect results. See #10629.
WRITE(p, " if (v_masked.r %s colorTestRef.r && v_masked.g %s colorTestRef.g && v_masked.b %s colorTestRef.b) %s\n", test, test, test, discardStatement);
} else if (compat.shaderLanguage == HLSL_D3D9) {
const char *test = colorTestFuncs[colorTestFunc];
// TODO: Use a texture to lookup bitwise ops instead?
WRITE(p, " vec3 colortest = roundAndScaleTo255v(v.rgb);\n");
WRITE(p, " if ((colortest.r %s u_alphacolorref.r) && (colortest.g %s u_alphacolorref.g) && (colortest.b %s u_alphacolorref.b)) %s\n", test, test, test, discardStatement);
} else if (compat.bitwiseOps) {
// Apparently GLES3 does not support vector bitwise ops.
WRITE(p, " ivec3 v_scaled = roundAndScaleTo255iv(v.rgb);\n");
if (compat.shaderLanguage == GLSL_VULKAN) {
// TODO: Use this for GL as well?
WRITE(p, " if ((v_scaled & u_alphacolormask.rgb) %s (u_alphacolorref.rgb & u_alphacolormask.rgb)) %s\n", colorTestFuncs[colorTestFunc], discardStatement);
} else {
const char *maskedFragColor = "ivec3(v_scaled.r & u_alphacolormask.r, v_scaled.g & u_alphacolormask.g, v_scaled.b & u_alphacolormask.b)";
const char *maskedColorRef = "ivec3(int(u_alphacolorref.r) & u_alphacolormask.r, int(u_alphacolorref.g) & u_alphacolormask.g, int(u_alphacolorref.b) & u_alphacolormask.b)";
WRITE(p, " if (%s %s %s) %s\n", maskedFragColor, colorTestFuncs[colorTestFunc], maskedColorRef, discardStatement);
}
} else if (gl_extensions.gpuVendor == GPU_VENDOR_IMGTEC) {
WRITE(p, " if (roundTo255thv(v.rgb) %s u_alphacolorref.rgb) %s\n", colorTestFuncs[colorTestFunc], discardStatement);
} else {
WRITE(p, " if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) %s\n", colorTestFuncs[colorTestFunc], discardStatement);
}
} else {
WRITE(p, " %s\n", discardStatement);
}
}
}
if (replaceBlend == REPLACE_BLEND_2X_SRC) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
}
if (replaceBlend == REPLACE_BLEND_PRE_SRC || replaceBlend == REPLACE_BLEND_PRE_SRC_2X_ALPHA) {
const char *srcFactor = "ERROR";
switch (replaceBlendFuncA) {
case GE_SRCBLEND_DSTCOLOR: srcFactor = "ERROR"; break;
case GE_SRCBLEND_INVDSTCOLOR: srcFactor = "ERROR"; break;
case GE_SRCBLEND_SRCALPHA: srcFactor = "splat3(v.a)"; break;
case GE_SRCBLEND_INVSRCALPHA: srcFactor = "splat3(1.0 - v.a)"; break;
case GE_SRCBLEND_DSTALPHA: srcFactor = "ERROR"; break;
case GE_SRCBLEND_INVDSTALPHA: srcFactor = "ERROR"; break;
case GE_SRCBLEND_DOUBLESRCALPHA: srcFactor = "splat3(v.a * 2.0)"; break;
case GE_SRCBLEND_DOUBLEINVSRCALPHA: srcFactor = "splat3(1.0 - v.a * 2.0)"; break;
// PRE_SRC for REPLACE_BLEND_PRE_SRC_2X_ALPHA means "double the src."
// It's close to the same, but clamping can still be an issue.
case GE_SRCBLEND_DOUBLEDSTALPHA: srcFactor = "splat3(2.0)"; break;
case GE_SRCBLEND_DOUBLEINVDSTALPHA: srcFactor = "ERROR"; break;
case GE_SRCBLEND_FIXA: srcFactor = "u_blendFixA"; break;
default: srcFactor = "u_blendFixA"; break;
}
if (!strcmp(srcFactor, "ERROR")) {
*errorString = "Bad replaceblend src factor";
return false;
}
WRITE(p, " v.rgb = v.rgb * %s;\n", srcFactor);
}
if (replaceBlend == REPLACE_BLEND_COPY_FBO && compat.shaderLanguage != HLSL_D3D9) {
// If we have NV_shader_framebuffer_fetch / EXT_shader_framebuffer_fetch, we skip the blit.
// We can just read the prev value more directly.
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, " vec4 destColor = fboTex.Load(int3((int)In.pixelPos.x, (int)In.pixelPos.y, 0));\n");
} else if (gstate_c.Supports(GPU_SUPPORTS_ANY_FRAMEBUFFER_FETCH)) {
WRITE(p, " lowp vec4 destColor = %s;\n", compat.lastFragData);
} else if (!compat.texelFetch) {
WRITE(p, " lowp vec4 destColor = %s(fbotex, gl_FragCoord.xy * u_fbotexSize.xy);\n", compat.texture);
} else {
WRITE(p, " lowp vec4 destColor = %s(fbotex, ivec2(gl_FragCoord.x, gl_FragCoord.y), 0);\n", compat.texelFetch);
}
const char *srcFactor = nullptr;
const char *dstFactor = nullptr;
switch (replaceBlendFuncA) {
case GE_SRCBLEND_DSTCOLOR: srcFactor = "destColor.rgb"; break;
case GE_SRCBLEND_INVDSTCOLOR: srcFactor = "(splat3(1.0) - destColor.rgb)"; break;
case GE_SRCBLEND_SRCALPHA: srcFactor = "v.aaa"; break;
case GE_SRCBLEND_INVSRCALPHA: srcFactor = "splat3(1.0 - v.a)"; break;
case GE_SRCBLEND_DSTALPHA: srcFactor = "destColor.aaa"; break;
case GE_SRCBLEND_INVDSTALPHA: srcFactor = "splat3(1.0) - destColor.aaa"; break;
case GE_SRCBLEND_DOUBLESRCALPHA: srcFactor = "v.aaa * 2.0"; break;
case GE_SRCBLEND_DOUBLEINVSRCALPHA: srcFactor = "splat3(1.0) - v.aaa * 2.0"; break;
case GE_SRCBLEND_DOUBLEDSTALPHA: srcFactor = "destColor.aaa * 2.0"; break;
case GE_SRCBLEND_DOUBLEINVDSTALPHA: srcFactor = "splat3(1.0) - destColor.aaa * 2.0"; break;
case GE_SRCBLEND_FIXA: srcFactor = "u_blendFixA"; break;
default: srcFactor = "u_blendFixA"; break;
}
switch (replaceBlendFuncB) {
case GE_DSTBLEND_SRCCOLOR: dstFactor = "v.rgb"; break;
case GE_DSTBLEND_INVSRCCOLOR: dstFactor = "(splat3(1.0) - v.rgb)"; break;
case GE_DSTBLEND_SRCALPHA: dstFactor = "v.aaa"; break;
case GE_DSTBLEND_INVSRCALPHA: dstFactor = "splat3(1.0) - v.aaa"; break;
case GE_DSTBLEND_DSTALPHA: dstFactor = "destColor.aaa"; break;
case GE_DSTBLEND_INVDSTALPHA: dstFactor = "splat3(1.0) - destColor.aaa"; break;
case GE_DSTBLEND_DOUBLESRCALPHA: dstFactor = "v.aaa * 2.0"; break;
case GE_DSTBLEND_DOUBLEINVSRCALPHA: dstFactor = "splat3(1.0) - v.aaa * 2.0"; break;
case GE_DSTBLEND_DOUBLEDSTALPHA: dstFactor = "destColor.aaa * 2.0"; break;
case GE_DSTBLEND_DOUBLEINVDSTALPHA: dstFactor = "splat3(1.0) - destColor.aaa * 2.0"; break;
case GE_DSTBLEND_FIXB: dstFactor = "u_blendFixB"; break;
default: dstFactor = "u_blendFixB"; break;
}
switch (replaceBlendEq) {
case GE_BLENDMODE_MUL_AND_ADD:
WRITE(p, " v.rgb = v.rgb * %s + destColor.rgb * %s;\n", srcFactor, dstFactor);
break;
case GE_BLENDMODE_MUL_AND_SUBTRACT:
WRITE(p, " v.rgb = v.rgb * %s - destColor.rgb * %s;\n", srcFactor, dstFactor);
break;
case GE_BLENDMODE_MUL_AND_SUBTRACT_REVERSE:
WRITE(p, " v.rgb = destColor.rgb * %s - v.rgb * %s;\n", dstFactor, srcFactor);
break;
case GE_BLENDMODE_MIN:
WRITE(p, " v.rgb = min(v.rgb, destColor.rgb);\n");
break;
case GE_BLENDMODE_MAX:
WRITE(p, " v.rgb = max(v.rgb, destColor.rgb);\n");
break;
case GE_BLENDMODE_ABSDIFF:
WRITE(p, " v.rgb = abs(v.rgb - destColor.rgb);\n");
break;
default:
*errorString = "Bad replace blend eq";
return false;
}
}
if (replaceBlend == REPLACE_BLEND_2X_ALPHA || replaceBlend == REPLACE_BLEND_PRE_SRC_2X_ALPHA) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
}
char replacedAlpha[64] = "0.0";
if (stencilToAlpha != REPLACE_ALPHA_NO) {
switch (replaceAlphaWithStencilType) {
case STENCIL_VALUE_UNIFORM:
truncate_cpy(replacedAlpha, "u_stencilReplaceValue");
break;
case STENCIL_VALUE_ZERO:
truncate_cpy(replacedAlpha, "0.0");
break;
case STENCIL_VALUE_ONE:
case STENCIL_VALUE_INVERT:
// In invert, we subtract by one, but we want to output one here.
truncate_cpy(replacedAlpha, "1.0");
break;
case STENCIL_VALUE_INCR_4:
case STENCIL_VALUE_DECR_4:
// We're adding/subtracting, just by the smallest value in 4-bit.
snprintf(replacedAlpha, sizeof(replacedAlpha), "%f", 1.0 / 15.0);
break;
case STENCIL_VALUE_INCR_8:
case STENCIL_VALUE_DECR_8:
// We're adding/subtracting, just by the smallest value in 8-bit.
snprintf(replacedAlpha, sizeof(replacedAlpha), "%f", 1.0 / 255.0);
break;
case STENCIL_VALUE_KEEP:
// Do nothing. We'll mask out the alpha using color mask.
break;
}
}
switch (stencilToAlpha) {
case REPLACE_ALPHA_DUALSOURCE:
// Handled at the end.
break;
case REPLACE_ALPHA_YES:
WRITE(p, " v.a = %s;\n", replacedAlpha);
break;
case REPLACE_ALPHA_NO:
// Nothing to do.
break;
default:
*errorString = "Bad stencil-to-alpha type, corrupt ID?";
return false;
}
LogicOpReplaceType replaceLogicOpType = (LogicOpReplaceType)id.Bits(FS_BIT_REPLACE_LOGIC_OP_TYPE, 2);
switch (replaceLogicOpType) {
case LOGICOPTYPE_ONE:
WRITE(p, " v.rgb = splat3(1.0);\n");
break;
case LOGICOPTYPE_INVERT:
WRITE(p, " v.rgb = splat3(1.0) - v.rgb;\n");
break;
case LOGICOPTYPE_NORMAL:
break;
default:
*errorString = "Bad logic op type, corrupt ID?";
return false;
}
if (gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT)) {
const double scale = DepthSliceFactor() * 65535.0;
WRITE(p, " highp float z = gl_FragCoord.z;\n");
if (gstate_c.Supports(GPU_SUPPORTS_ACCURATE_DEPTH)) {
// We center the depth with an offset, but only its fraction matters.
// When (DepthSliceFactor() - 1) is odd, it will be 0.5, otherwise 0.
if (((int)(DepthSliceFactor() - 1.0f) & 1) == 1) {
WRITE(p, " z = (floor((z * %f) - (1.0 / 2.0)) + (1.0 / 2.0)) * (1.0 / %f);\n", scale, scale);
} else {
WRITE(p, " z = floor(z * %f) * (1.0 / %f);\n", scale, scale);
}
} else {
WRITE(p, " z = (1.0/65535.0) * floor(z * 65535.0);\n");
}
WRITE(p, " gl_FragDepth = z;\n");
} else if (!earlyFragmentTests && useAdrenoBugWorkaround) {
// Adreno (and possibly MESA/others) apply early frag tests even with discard in the shader.
// Writing depth prevents the bug, even with depth_unchanged specified.
WRITE(p, " gl_FragDepth = gl_FragCoord.z;\n");
}
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE) {
WRITE(p, " %s = vec4(v.rgb, %s);\n", compat.fragColor0, replacedAlpha);
WRITE(p, " %s = vec4(0.0, 0.0, 0.0, v.a);\n", compat.fragColor1);
} else if (compat.shaderLanguage != HLSL_D3D9) {
WRITE(p, " %s = v;\n", compat.fragColor0);
}
if (compat.shaderLanguage == HLSL_D3D11) {
WRITE(p, " return outfragment;\n");
} else if (compat.shaderLanguage == HLSL_D3D9) {
WRITE(p, " return v;\n");
}
WRITE(p, "}\n");
return true;
}
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