| /* |
| Copyright 2011 Google Inc. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| #include "GrGLProgram.h" |
| |
| #include "GrBinHashKey.h" |
| #include "GrGLConfig.h" |
| #include "GrGLEffect.h" |
| #include "GrMemory.h" |
| |
| #include "SkXfermode.h" |
| |
| namespace { |
| |
| const char* GrPrecision() { |
| if (GR_GL_SUPPORT_ES2) { |
| return "mediump"; |
| } else { |
| return " "; |
| } |
| } |
| |
| const char* GrShaderPrecision() { |
| if (GR_GL_SUPPORT_ES2) { |
| return "precision mediump float;\n"; |
| } else { |
| return ""; |
| } |
| } |
| |
| } // namespace |
| |
| #define PRINT_SHADERS 0 |
| |
| #if GR_GL_ATTRIBUTE_MATRICES |
| #define VIEW_MATRIX_NAME "aViewM" |
| #else |
| #define VIEW_MATRIX_NAME "uViewM" |
| #endif |
| |
| #define POS_ATTR_NAME "aPosition" |
| #define COL_ATTR_NAME "aColor" |
| #define COL_UNI_NAME "uColor" |
| #define EDGES_UNI_NAME "uEdges" |
| #define COL_FILTER_UNI_NAME "uColorFilter" |
| |
| static inline void tex_attr_name(int coordIdx, GrStringBuilder* s) { |
| *s = "aTexCoord"; |
| s->appendS32(coordIdx); |
| } |
| |
| static inline const char* float_vector_type(int count) { |
| static const char* FLOAT_VECS[] = {"ERROR", "float", "vec2", "vec3", "vec4"}; |
| GrAssert(count >= 1 && count < (int)GR_ARRAY_COUNT(FLOAT_VECS)); |
| return FLOAT_VECS[count]; |
| } |
| |
| static inline const char* vector_homog_coord(int count) { |
| static const char* HOMOGS[] = {"ERROR", "", ".y", ".z", ".w"}; |
| GrAssert(count >= 1 && count < (int)GR_ARRAY_COUNT(HOMOGS)); |
| return HOMOGS[count]; |
| } |
| |
| static inline const char* vector_nonhomog_coords(int count) { |
| static const char* NONHOMOGS[] = {"ERROR", "", ".x", ".xy", ".xyz"}; |
| GrAssert(count >= 1 && count < (int)GR_ARRAY_COUNT(NONHOMOGS)); |
| return NONHOMOGS[count]; |
| } |
| |
| static inline const char* vector_all_coords(int count) { |
| static const char* ALL[] = {"ERROR", "", ".xy", ".xyz", ".xyzw"}; |
| GrAssert(count >= 1 && count < (int)GR_ARRAY_COUNT(ALL)); |
| return ALL[count]; |
| } |
| |
| static void tex_matrix_name(int stage, GrStringBuilder* s) { |
| #if GR_GL_ATTRIBUTE_MATRICES |
| *s = "aTexM"; |
| #else |
| *s = "uTexM"; |
| #endif |
| s->appendS32(stage); |
| } |
| |
| static void normalized_texel_size_name(int stage, GrStringBuilder* s) { |
| *s = "uTexelSize"; |
| s->appendS32(stage); |
| } |
| |
| static void sampler_name(int stage, GrStringBuilder* s) { |
| *s = "uSampler"; |
| s->appendS32(stage); |
| } |
| |
| static void stage_varying_name(int stage, GrStringBuilder* s) { |
| *s = "vStage"; |
| s->appendS32(stage); |
| } |
| |
| static void radial2_param_name(int stage, GrStringBuilder* s) { |
| *s = "uRadial2Params"; |
| s->appendS32(stage); |
| } |
| |
| static void radial2_varying_name(int stage, GrStringBuilder* s) { |
| *s = "vB"; |
| s->appendS32(stage); |
| } |
| |
| GrGLProgram::GrGLProgram() { |
| for(int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) { |
| fStageEffects[stage] = NULL; |
| } |
| } |
| |
| GrGLProgram::~GrGLProgram() { |
| } |
| |
| void GrGLProgram::buildKey(GrBinHashKeyBuilder& key) const { |
| // Add stage configuration to the key |
| key.keyData(reinterpret_cast<const uint8_t*>(&fProgramDesc), sizeof(ProgramDesc)); |
| |
| for(int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) { |
| // First pass: count effects and write the count to the key. |
| // This may seem like we are adding redundant data to the |
| // key, but in ensures the one key cannot be a prefix of |
| // another key, or identical to the key of a different program. |
| GrGLEffect* currentEffect = fStageEffects[stage]; |
| uint8_t effectCount = 0; |
| while (currentEffect) { |
| GrAssert(effectCount < 255); // overflow detection |
| ++effectCount; |
| currentEffect = currentEffect->nextEffect(); |
| } |
| key.keyData(reinterpret_cast<const uint8_t*>(&effectCount), sizeof(uint8_t)); |
| |
| // Second pass: continue building key using the effects |
| currentEffect = fStageEffects[stage]; |
| while (currentEffect) { |
| fStageEffects[stage]->buildKey(key); |
| } |
| } |
| } |
| |
| bool GrGLProgram::doGLSetup(GrPrimitiveType type, |
| GrGLProgram::CachedData* programData) const { |
| for (int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) { |
| GrGLEffect* effect = fStageEffects[stage]; |
| if (effect) { |
| if (!effect->doGLSetup(type, programData->fProgramID)) { |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| void GrGLProgram::doGLPost() const { |
| for (int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) { |
| GrGLEffect* effect = fStageEffects[stage]; |
| if (effect) { |
| effect->doGLPost(); |
| } |
| } |
| } |
| |
| /** |
| * Create a text coefficient to be used in fragment shader code. |
| */ |
| static void coefficientString(GrStringBuilder* str, SkXfermode::Coeff coeff, |
| const char* src, const char* dst) { |
| switch (coeff) { |
| case SkXfermode::kZero_Coeff: /** 0 */ |
| *str = "0.0"; |
| break; |
| case SkXfermode::kOne_Coeff: /** 1 */ |
| *str = "1.0"; |
| break; |
| case SkXfermode::kSA_Coeff: /** src alpha */ |
| str->appendf("%s.a", src); |
| break; |
| case SkXfermode::kISA_Coeff: /** inverse src alpha (i.e. 1 - sa) */ |
| str->appendf("(1.0 - %s.a)", src); |
| break; |
| case SkXfermode::kDA_Coeff: /** dst alpha */ |
| str->appendf("%s.a", dst); |
| break; |
| case SkXfermode::kIDA_Coeff: /** inverse dst alpha (i.e. 1 - da) */ |
| str->appendf("(1.0 - %s.a)", dst); |
| break; |
| case SkXfermode::kSC_Coeff: |
| str->append(src); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * Adds a line to the fragment shader code which modifies the color by |
| * the specified color filter. |
| */ |
| static void addColorFilter(GrStringBuilder* FSCode, const char * outputVar, |
| SkXfermode::Mode colorFilterXfermode, const char* dstColor) { |
| SkXfermode::Coeff srcCoeff, dstCoeff; |
| SkDEBUGCODE(bool success =) |
| SkXfermode::ModeAsCoeff(colorFilterXfermode, &srcCoeff, &dstCoeff); |
| // We currently do not handle modes that cannot be represented as |
| // coefficients. |
| GrAssert(success); |
| GrStringBuilder srcCoeffStr, dstCoeffStr; |
| coefficientString(&srcCoeffStr, srcCoeff, COL_FILTER_UNI_NAME, dstColor); |
| coefficientString(&dstCoeffStr, dstCoeff, COL_FILTER_UNI_NAME, dstColor); |
| FSCode->appendf("\t%s = %s*%s + %s*%s;\n", outputVar, srcCoeffStr.c_str(), |
| COL_FILTER_UNI_NAME, dstCoeffStr.c_str(), dstColor); |
| } |
| |
| bool GrGLProgram::genProgram(GrGLProgram::CachedData* programData) const { |
| |
| ShaderCodeSegments segments; |
| const uint32_t& layout = fProgramDesc.fVertexLayout; |
| |
| programData->fUniLocations.reset(); |
| |
| #if GR_GL_ATTRIBUTE_MATRICES |
| segments.fVSAttrs += "attribute mat3 " VIEW_MATRIX_NAME ";\n"; |
| programData->fUniLocations.fViewMatrixUni = kSetAsAttribute; |
| #else |
| segments.fVSUnis += "uniform mat3 " VIEW_MATRIX_NAME ";\n"; |
| programData->fUniLocations.fViewMatrixUni = kUseUniform; |
| #endif |
| segments.fVSAttrs += "attribute vec2 " POS_ATTR_NAME ";\n"; |
| |
| segments.fVSCode.append( |
| "void main() {\n" |
| "\tvec3 pos3 = " VIEW_MATRIX_NAME " * vec3("POS_ATTR_NAME", 1);\n" |
| "\tgl_Position = vec4(pos3.xy, 0, pos3.z);\n"); |
| |
| // incoming color to current stage being processed. |
| GrStringBuilder inColor; |
| |
| switch (fProgramDesc.fColorType) { |
| case ProgramDesc::kAttribute_ColorType: |
| segments.fVSAttrs.append( "attribute vec4 " COL_ATTR_NAME ";\n"); |
| segments.fVaryings.append("varying vec4 vColor;\n"); |
| segments.fVSCode.append( "\tvColor = " COL_ATTR_NAME ";\n"); |
| inColor = "vColor"; |
| break; |
| case ProgramDesc::kUniform_ColorType: |
| segments.fFSUnis.append( "uniform vec4 " COL_UNI_NAME ";\n"); |
| programData->fUniLocations.fColorUni = kUseUniform; |
| inColor = COL_UNI_NAME; |
| break; |
| case ProgramDesc::kNone_ColorType: |
| inColor = ""; |
| break; |
| } |
| |
| if (fProgramDesc.fUsesEdgeAA) { |
| segments.fFSUnis.append("uniform vec3 " EDGES_UNI_NAME "[6];\n"); |
| } |
| |
| if (fProgramDesc.fEmitsPointSize){ |
| segments.fVSCode.append("\tgl_PointSize = 1.0;\n"); |
| } |
| |
| segments.fFSCode.append("void main() {\n"); |
| |
| // add texture coordinates that are used to the list of vertex attr decls |
| GrStringBuilder texCoordAttrs[GrDrawTarget::kMaxTexCoords]; |
| for (int t = 0; t < GrDrawTarget::kMaxTexCoords; ++t) { |
| if (GrDrawTarget::VertexUsesTexCoordIdx(t, layout)) { |
| tex_attr_name(t, texCoordAttrs + t); |
| segments.fVSAttrs.appendf("attribute vec2 %s;\n", texCoordAttrs[t].c_str()); |
| } |
| } |
| |
| bool useColorFilter = |
| // The rest of transfer mode color filters have not been implemented |
| fProgramDesc.fColorFilterXfermode <= SkXfermode::kMultiply_Mode |
| // This mode has no effect. |
| && fProgramDesc.fColorFilterXfermode != SkXfermode::kDst_Mode; |
| bool onlyUseColorFilter = useColorFilter |
| && (fProgramDesc.fColorFilterXfermode == SkXfermode::kClear_Mode |
| || fProgramDesc.fColorFilterXfermode == SkXfermode::kSrc_Mode); |
| if (useColorFilter) { |
| // Set up a uniform for the color |
| segments.fFSUnis.append( "uniform vec4 " COL_FILTER_UNI_NAME ";\n"); |
| programData->fUniLocations.fColorFilterUni = kUseUniform; |
| } |
| |
| // for each enabled stage figure out what the input coordinates are |
| // and count the number of stages in use. |
| const char* stageInCoords[GrDrawTarget::kNumStages]; |
| int numActiveStages = 0; |
| |
| if (!onlyUseColorFilter) { |
| for (int s = 0; s < GrDrawTarget::kNumStages; ++s) { |
| if (fProgramDesc.fStages[s].fEnabled) { |
| if (GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(s) & layout) { |
| stageInCoords[s] = POS_ATTR_NAME; |
| } else { |
| int tcIdx = GrDrawTarget::VertexTexCoordsForStage(s, layout); |
| // we better have input tex coordinates if stage is enabled. |
| GrAssert(tcIdx >= 0); |
| GrAssert(texCoordAttrs[tcIdx].size()); |
| stageInCoords[s] = texCoordAttrs[tcIdx].c_str(); |
| } |
| ++numActiveStages; |
| } |
| } |
| } |
| |
| // if we have active stages string them together, feeding the output color |
| // of each to the next and generating code for each stage. |
| if (numActiveStages) { |
| int currActiveStage = 0; |
| GrStringBuilder outColor; |
| for (int s = 0; s < GrDrawTarget::kNumStages; ++s) { |
| if (fProgramDesc.fStages[s].fEnabled) { |
| if (currActiveStage < (numActiveStages - 1) || useColorFilter) { |
| outColor = "color"; |
| outColor.appendS32(currActiveStage); |
| segments.fFSCode.appendf("\tvec4 %s;\n", outColor.c_str()); |
| } else { |
| outColor = "gl_FragColor"; |
| } |
| |
| genStageCode(s, |
| fProgramDesc.fStages[s], |
| inColor.size() ? inColor.c_str() : NULL, |
| outColor.c_str(), |
| stageInCoords[s], |
| &segments, |
| &programData->fUniLocations.fStages[s]); |
| ++currActiveStage; |
| inColor = outColor; |
| } |
| } |
| if (useColorFilter) { |
| addColorFilter(&segments.fFSCode, "gl_FragColor", |
| fProgramDesc.fColorFilterXfermode, outColor.c_str()); |
| } |
| |
| } else { |
| if (fProgramDesc.fUsesEdgeAA) { |
| // FIXME: put the a's in a loop |
| segments.fFSCode.append( |
| "\tvec3 pos = vec3(gl_FragCoord.xy, 1);\n" |
| "\tfloat a0 = clamp(dot(uEdges[0], pos), 0.0, 1.0);\n" |
| "\tfloat a1 = clamp(dot(uEdges[1], pos), 0.0, 1.0);\n" |
| "\tfloat a2 = clamp(dot(uEdges[2], pos), 0.0, 1.0);\n" |
| "\tfloat a3 = clamp(dot(uEdges[3], pos), 0.0, 1.0);\n" |
| "\tfloat a4 = clamp(dot(uEdges[4], pos), 0.0, 1.0);\n" |
| "\tfloat a5 = clamp(dot(uEdges[5], pos), 0.0, 1.0);\n" |
| "\tfloat edgeAlpha = min(min(a0 * a1, a2 * a3), a4 * a5);\n"); |
| if (inColor.size()) { |
| inColor.append(" * edgeAlpha"); |
| } else { |
| inColor = "vec4(edgeAlpha)"; |
| } |
| } |
| // we may not have any incoming color |
| const char * incomingColor = (inColor.size() ? inColor.c_str() |
| : "vec4(1,1,1,1)"); |
| if (useColorFilter) { |
| addColorFilter(&segments.fFSCode, "gl_FragColor", |
| fProgramDesc.fColorFilterXfermode, incomingColor); |
| } else { |
| segments.fFSCode.appendf("\tgl_FragColor = %s;\n", incomingColor); |
| } |
| } |
| segments.fVSCode.append("}\n"); |
| segments.fFSCode.append("}\n"); |
| |
| if (!CompileFSAndVS(segments, programData)) { |
| return false; |
| } |
| |
| if (!this->bindAttribsAndLinkProgram(texCoordAttrs, programData)) { |
| return false; |
| } |
| |
| this->getUniformLocationsAndInitCache(programData); |
| |
| return true; |
| } |
| |
| bool GrGLProgram::CompileFSAndVS(const ShaderCodeSegments& segments, |
| CachedData* programData) { |
| |
| const char* strings[4]; |
| int lengths[4]; |
| int stringCnt = 0; |
| |
| if (segments.fVSUnis.size()) { |
| strings[stringCnt] = segments.fVSUnis.c_str(); |
| lengths[stringCnt] = segments.fVSUnis.size(); |
| ++stringCnt; |
| } |
| if (segments.fVSAttrs.size()) { |
| strings[stringCnt] = segments.fVSAttrs.c_str(); |
| lengths[stringCnt] = segments.fVSAttrs.size(); |
| ++stringCnt; |
| } |
| if (segments.fVaryings.size()) { |
| strings[stringCnt] = segments.fVaryings.c_str(); |
| lengths[stringCnt] = segments.fVaryings.size(); |
| ++stringCnt; |
| } |
| |
| GrAssert(segments.fVSCode.size()); |
| strings[stringCnt] = segments.fVSCode.c_str(); |
| lengths[stringCnt] = segments.fVSCode.size(); |
| ++stringCnt; |
| |
| #if PRINT_SHADERS |
| GrPrintf(segments.fVSUnis.c_str()); |
| GrPrintf(segments.fVSAttrs.c_str()); |
| GrPrintf(segments.fVaryings.c_str()); |
| GrPrintf(segments.fVSCode.c_str()); |
| GrPrintf("\n"); |
| #endif |
| programData->fVShaderID = CompileShader(GR_GL_VERTEX_SHADER, |
| stringCnt, |
| strings, |
| lengths); |
| |
| if (!programData->fVShaderID) { |
| return false; |
| } |
| |
| stringCnt = 0; |
| |
| if (strlen(GrShaderPrecision()) > 1) { |
| strings[stringCnt] = GrShaderPrecision(); |
| lengths[stringCnt] = strlen(GrShaderPrecision()); |
| ++stringCnt; |
| } |
| if (segments.fFSUnis.size()) { |
| strings[stringCnt] = segments.fFSUnis.c_str(); |
| lengths[stringCnt] = segments.fFSUnis.size(); |
| ++stringCnt; |
| } |
| if (segments.fVaryings.size()) { |
| strings[stringCnt] = segments.fVaryings.c_str(); |
| lengths[stringCnt] = segments.fVaryings.size(); |
| ++stringCnt; |
| } |
| |
| GrAssert(segments.fFSCode.size()); |
| strings[stringCnt] = segments.fFSCode.c_str(); |
| lengths[stringCnt] = segments.fFSCode.size(); |
| ++stringCnt; |
| |
| #if PRINT_SHADERS |
| GrPrintf(GrShaderPrecision()); |
| GrPrintf(segments.fFSUnis.c_str()); |
| GrPrintf(segments.fVaryings.c_str()); |
| GrPrintf(segments.fFSCode.c_str()); |
| GrPrintf("\n"); |
| #endif |
| programData->fFShaderID = CompileShader(GR_GL_FRAGMENT_SHADER, |
| stringCnt, |
| strings, |
| lengths); |
| |
| if (!programData->fFShaderID) { |
| return false; |
| } |
| return true; |
| } |
| |
| GrGLuint GrGLProgram::CompileShader(GrGLenum type, |
| int stringCnt, |
| const char** strings, |
| int* stringLengths) { |
| GrGLuint shader = GR_GL(CreateShader(type)); |
| if (0 == shader) { |
| return 0; |
| } |
| |
| GrGLint compiled = GR_GL_INIT_ZERO; |
| GR_GL(ShaderSource(shader, stringCnt, strings, stringLengths)); |
| GR_GL(CompileShader(shader)); |
| GR_GL(GetShaderiv(shader, GR_GL_COMPILE_STATUS, &compiled)); |
| |
| if (!compiled) { |
| GrGLint infoLen = GR_GL_INIT_ZERO; |
| GR_GL(GetShaderiv(shader, GR_GL_INFO_LOG_LENGTH, &infoLen)); |
| GrAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger |
| if (infoLen > 0) { |
| GR_GL(GetShaderInfoLog(shader, infoLen+1, NULL, (char*)log.get())); |
| for (int i = 0; i < stringCnt; ++i) { |
| if (NULL == stringLengths || stringLengths[i] < 0) { |
| GrPrintf(strings[i]); |
| } else { |
| GrPrintf("%.*s", stringLengths[i], strings[i]); |
| } |
| } |
| GrPrintf("\n%s", log.get()); |
| } |
| GrAssert(!"Shader compilation failed!"); |
| GR_GL(DeleteShader(shader)); |
| return 0; |
| } |
| return shader; |
| } |
| |
| bool GrGLProgram::bindAttribsAndLinkProgram(GrStringBuilder texCoordAttrNames[], |
| CachedData* programData) const { |
| programData->fProgramID = GR_GL(CreateProgram()); |
| if (!programData->fProgramID) { |
| return false; |
| } |
| const GrGLint& progID = programData->fProgramID; |
| |
| GR_GL(AttachShader(progID, programData->fVShaderID)); |
| GR_GL(AttachShader(progID, programData->fFShaderID)); |
| |
| // Bind the attrib locations to same values for all shaders |
| GR_GL(BindAttribLocation(progID, PositionAttributeIdx(), POS_ATTR_NAME)); |
| for (int t = 0; t < GrDrawTarget::kMaxTexCoords; ++t) { |
| if (texCoordAttrNames[t].size()) { |
| GR_GL(BindAttribLocation(progID, |
| TexCoordAttributeIdx(t), |
| texCoordAttrNames[t].c_str())); |
| } |
| } |
| |
| |
| if (kSetAsAttribute == programData->fUniLocations.fViewMatrixUni) { |
| GR_GL(BindAttribLocation(progID, |
| ViewMatrixAttributeIdx(), |
| VIEW_MATRIX_NAME)); |
| } |
| |
| for (int s = 0; s < GrDrawTarget::kNumStages; ++s) { |
| const StageUniLocations& unis = programData->fUniLocations.fStages[s]; |
| if (kSetAsAttribute == unis.fTextureMatrixUni) { |
| GrStringBuilder matName; |
| tex_matrix_name(s, &matName); |
| GR_GL(BindAttribLocation(progID, |
| TextureMatrixAttributeIdx(s), |
| matName.c_str())); |
| } |
| } |
| |
| |
| GR_GL(BindAttribLocation(progID, ColorAttributeIdx(), COL_ATTR_NAME)); |
| |
| GR_GL(LinkProgram(progID)); |
| |
| GrGLint linked = GR_GL_INIT_ZERO; |
| GR_GL(GetProgramiv(progID, GR_GL_LINK_STATUS, &linked)); |
| if (!linked) { |
| GrGLint infoLen = GR_GL_INIT_ZERO; |
| GR_GL(GetProgramiv(progID, GR_GL_INFO_LOG_LENGTH, &infoLen)); |
| GrAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger |
| if (infoLen > 0) { |
| GR_GL(GetProgramInfoLog(progID, |
| infoLen+1, |
| NULL, |
| (char*)log.get())); |
| GrPrintf((char*)log.get()); |
| } |
| GrAssert(!"Error linking program"); |
| GR_GL(DeleteProgram(progID)); |
| programData->fProgramID = 0; |
| return false; |
| } |
| return true; |
| } |
| |
| void GrGLProgram::getUniformLocationsAndInitCache(CachedData* programData) const { |
| const GrGLint& progID = programData->fProgramID; |
| |
| if (kUseUniform == programData->fUniLocations.fViewMatrixUni) { |
| programData->fUniLocations.fViewMatrixUni = |
| GR_GL(GetUniformLocation(progID, VIEW_MATRIX_NAME)); |
| GrAssert(kUnusedUniform != programData->fUniLocations.fViewMatrixUni); |
| } |
| if (kUseUniform == programData->fUniLocations.fColorUni) { |
| programData->fUniLocations.fColorUni = |
| GR_GL(GetUniformLocation(progID, COL_UNI_NAME)); |
| GrAssert(kUnusedUniform != programData->fUniLocations.fColorUni); |
| } |
| if (kUseUniform == programData->fUniLocations.fColorFilterUni) { |
| programData->fUniLocations.fColorFilterUni = |
| GR_GL(GetUniformLocation(progID, COL_FILTER_UNI_NAME)); |
| GrAssert(kUnusedUniform != programData->fUniLocations.fColorFilterUni); |
| } |
| |
| if (fProgramDesc.fUsesEdgeAA) { |
| programData->fUniLocations.fEdgesUni = |
| GR_GL(GetUniformLocation(progID, EDGES_UNI_NAME)); |
| GrAssert(kUnusedUniform != programData->fUniLocations.fEdgesUni); |
| } else { |
| programData->fUniLocations.fEdgesUni = kUnusedUniform; |
| } |
| |
| for (int s = 0; s < GrDrawTarget::kNumStages; ++s) { |
| StageUniLocations& locations = programData->fUniLocations.fStages[s]; |
| if (fProgramDesc.fStages[s].fEnabled) { |
| if (kUseUniform == locations.fTextureMatrixUni) { |
| GrStringBuilder texMName; |
| tex_matrix_name(s, &texMName); |
| locations.fTextureMatrixUni = GR_GL(GetUniformLocation( |
| progID, |
| texMName.c_str())); |
| GrAssert(kUnusedUniform != locations.fTextureMatrixUni); |
| } |
| |
| if (kUseUniform == locations.fSamplerUni) { |
| GrStringBuilder samplerName; |
| sampler_name(s, &samplerName); |
| locations.fSamplerUni = GR_GL(GetUniformLocation( |
| progID, |
| samplerName.c_str())); |
| GrAssert(kUnusedUniform != locations.fSamplerUni); |
| } |
| |
| if (kUseUniform == locations.fNormalizedTexelSizeUni) { |
| GrStringBuilder texelSizeName; |
| normalized_texel_size_name(s, &texelSizeName); |
| locations.fNormalizedTexelSizeUni = |
| GR_GL(GetUniformLocation(progID, texelSizeName.c_str())); |
| GrAssert(kUnusedUniform != locations.fNormalizedTexelSizeUni); |
| } |
| |
| if (kUseUniform == locations.fRadial2Uni) { |
| GrStringBuilder radial2ParamName; |
| radial2_param_name(s, &radial2ParamName); |
| locations.fRadial2Uni = GR_GL(GetUniformLocation( |
| progID, |
| radial2ParamName.c_str())); |
| GrAssert(kUnusedUniform != locations.fRadial2Uni); |
| } |
| } |
| } |
| GR_GL(UseProgram(progID)); |
| |
| // init sampler unis and set bogus values for state tracking |
| for (int s = 0; s < GrDrawTarget::kNumStages; ++s) { |
| if (kUnusedUniform != programData->fUniLocations.fStages[s].fSamplerUni) { |
| GR_GL(Uniform1i(programData->fUniLocations.fStages[s].fSamplerUni, s)); |
| } |
| programData->fTextureMatrices[s] = GrMatrix::InvalidMatrix(); |
| programData->fRadial2CenterX1[s] = GR_ScalarMax; |
| programData->fRadial2Radius0[s] = -GR_ScalarMax; |
| programData->fTextureWidth[s] = -1; |
| programData->fTextureHeight[s] = -1; |
| } |
| programData->fViewMatrix = GrMatrix::InvalidMatrix(); |
| programData->fColor = GrColor_ILLEGAL; |
| programData->fColorFilterColor = GrColor_ILLEGAL; |
| } |
| |
| //============================================================================ |
| // Stage code generation |
| //============================================================================ |
| |
| void GrGLProgram::genStageCode(int stageNum, |
| const GrGLProgram::ProgramDesc::StageDesc& desc, |
| const char* fsInColor, // NULL means no incoming color |
| const char* fsOutColor, |
| const char* vsInCoord, |
| ShaderCodeSegments* segments, |
| StageUniLocations* locations) const { |
| |
| GrAssert(stageNum >= 0 && stageNum <= 9); |
| |
| GrStringBuilder varyingName; |
| stage_varying_name(stageNum, &varyingName); |
| |
| // First decide how many coords are needed to access the texture |
| // Right now it's always 2 but we could start using 1D textures for |
| // gradients. |
| static const int coordDims = 2; |
| int varyingDims; |
| /// Vertex Shader Stuff |
| |
| // decide whether we need a matrix to transform texture coords |
| // and whether the varying needs a perspective coord. |
| GrStringBuilder texMName; |
| tex_matrix_name(stageNum, &texMName); |
| if (desc.fOptFlags & ProgramDesc::StageDesc::kIdentityMatrix_OptFlagBit) { |
| varyingDims = coordDims; |
| } else { |
| #if GR_GL_ATTRIBUTE_MATRICES |
| segments->fVSAttrs.appendf("attribute mat3 %s;\n", texMName.c_str()); |
| locations->fTextureMatrixUni = kSetAsAttribute; |
| #else |
| segments->fVSUnis.appendf("uniform mat3 %s;\n", texMName.c_str()); |
| locations->fTextureMatrixUni = kUseUniform; |
| #endif |
| if (desc.fOptFlags & ProgramDesc::StageDesc::kNoPerspective_OptFlagBit) { |
| varyingDims = coordDims; |
| } else { |
| varyingDims = coordDims + 1; |
| } |
| } |
| |
| GrStringBuilder samplerName; |
| sampler_name(stageNum, &samplerName); |
| segments->fFSUnis.appendf("uniform sampler2D %s;\n", samplerName.c_str()); |
| locations->fSamplerUni = kUseUniform; |
| |
| GrStringBuilder texelSizeName; |
| if (ProgramDesc::StageDesc::k2x2_FetchMode == desc.fFetchMode) { |
| normalized_texel_size_name(stageNum, &texelSizeName); |
| segments->fFSUnis.appendf("uniform vec2 %s;\n", texelSizeName.c_str()); |
| } |
| |
| segments->fVaryings.appendf("varying %s %s;\n", |
| float_vector_type(varyingDims), varyingName.c_str()); |
| |
| if (desc.fOptFlags & ProgramDesc::StageDesc::kIdentityMatrix_OptFlagBit) { |
| GrAssert(varyingDims == coordDims); |
| segments->fVSCode.appendf("\t%s = %s;\n", varyingName.c_str(), vsInCoord); |
| } else { |
| // varying = texMatrix * texCoord |
| segments->fVSCode.appendf("\t%s = (%s * vec3(%s, 1))%s;\n", |
| varyingName.c_str(), texMName.c_str(), |
| vsInCoord, vector_all_coords(varyingDims)); |
| } |
| |
| GrStringBuilder radial2ParamsName; |
| radial2_param_name(stageNum, &radial2ParamsName); |
| // for radial grads without perspective we can pass the linear |
| // part of the quadratic as a varying. |
| GrStringBuilder radial2VaryingName; |
| radial2_varying_name(stageNum, &radial2VaryingName); |
| |
| if (ProgramDesc::StageDesc::kRadial2Gradient_CoordMapping == desc.fCoordMapping) { |
| |
| segments->fVSUnis.appendf("uniform %s float %s[6];\n", |
| GrPrecision(), radial2ParamsName.c_str()); |
| segments->fFSUnis.appendf("uniform float %s[6];\n", |
| radial2ParamsName.c_str()); |
| locations->fRadial2Uni = kUseUniform; |
| |
| // if there is perspective we don't interpolate this |
| if (varyingDims == coordDims) { |
| GrAssert(2 == coordDims); |
| segments->fVaryings.appendf("varying float %s;\n", radial2VaryingName.c_str()); |
| |
| // r2Var = 2 * (r2Parm[2] * varCoord.x - r2Param[3]) |
| segments->fVSCode.appendf("\t%s = 2.0 *(%s[2] * %s.x - %s[3]);\n", |
| radial2VaryingName.c_str(), radial2ParamsName.c_str(), |
| varyingName.c_str(), radial2ParamsName.c_str()); |
| } |
| } |
| |
| /// Fragment Shader Stuff |
| GrStringBuilder fsCoordName; |
| // function used to access the shader, may be made projective |
| GrStringBuilder texFunc("texture2D"); |
| if (desc.fOptFlags & (ProgramDesc::StageDesc::kIdentityMatrix_OptFlagBit | |
| ProgramDesc::StageDesc::kNoPerspective_OptFlagBit)) { |
| GrAssert(varyingDims == coordDims); |
| fsCoordName = varyingName; |
| } else { |
| // if we have to do some special op on the varyings to get |
| // our final tex coords then when in perspective we have to |
| // do an explicit divide. Otherwise, we can use a Proj func. |
| if (ProgramDesc::StageDesc::kIdentity_CoordMapping == desc.fCoordMapping && |
| ProgramDesc::StageDesc::kSingle_FetchMode == desc.fFetchMode) { |
| texFunc.append("Proj"); |
| fsCoordName = varyingName; |
| } else { |
| fsCoordName = "inCoord"; |
| fsCoordName.appendS32(stageNum); |
| segments->fFSCode.appendf("\t%s %s = %s%s / %s%s;\n", |
| float_vector_type(coordDims), |
| fsCoordName.c_str(), |
| varyingName.c_str(), |
| vector_nonhomog_coords(varyingDims), |
| varyingName.c_str(), |
| vector_homog_coord(varyingDims)); |
| } |
| } |
| |
| GrStringBuilder sampleCoords; |
| bool complexCoord = false; |
| switch (desc.fCoordMapping) { |
| case ProgramDesc::StageDesc::kIdentity_CoordMapping: |
| sampleCoords = fsCoordName; |
| break; |
| case ProgramDesc::StageDesc::kSweepGradient_CoordMapping: |
| sampleCoords.printf("vec2(atan(- %s.y, - %s.x) * 0.1591549430918 + 0.5, 0.5)", fsCoordName.c_str(), fsCoordName.c_str()); |
| complexCoord = true; |
| break; |
| case ProgramDesc::StageDesc::kRadialGradient_CoordMapping: |
| sampleCoords.printf("vec2(length(%s.xy), 0.5)", fsCoordName.c_str()); |
| complexCoord = true; |
| break; |
| case ProgramDesc::StageDesc::kRadial2Gradient_CoordMapping: { |
| GrStringBuilder cName("c"); |
| GrStringBuilder ac4Name("ac4"); |
| GrStringBuilder rootName("root"); |
| |
| cName.appendS32(stageNum); |
| ac4Name.appendS32(stageNum); |
| rootName.appendS32(stageNum); |
| |
| // if we were able to interpolate the linear component bVar is the varying |
| // otherwise compute it |
| GrStringBuilder bVar; |
| if (coordDims == varyingDims) { |
| bVar = radial2VaryingName; |
| GrAssert(2 == varyingDims); |
| } else { |
| GrAssert(3 == varyingDims); |
| bVar = "b"; |
| bVar.appendS32(stageNum); |
| segments->fFSCode.appendf("\tfloat %s = 2.0 * (%s[2] * %s.x - %s[3]);\n", |
| bVar.c_str(), radial2ParamsName.c_str(), |
| fsCoordName.c_str(), radial2ParamsName.c_str()); |
| } |
| |
| // c = (x^2)+(y^2) - params[4] |
| segments->fFSCode.appendf("\tfloat %s = dot(%s, %s) - %s[4];\n", |
| cName.c_str(), fsCoordName.c_str(), |
| fsCoordName.c_str(), |
| radial2ParamsName.c_str()); |
| // ac4 = 4.0 * params[0] * c |
| segments->fFSCode.appendf("\tfloat %s = %s[0] * 4.0 * %s;\n", |
| ac4Name.c_str(), radial2ParamsName.c_str(), |
| cName.c_str()); |
| |
| // root = sqrt(b^2-4ac) |
| // (abs to avoid exception due to fp precision) |
| segments->fFSCode.appendf("\tfloat %s = sqrt(abs(%s*%s - %s));\n", |
| rootName.c_str(), bVar.c_str(), bVar.c_str(), |
| ac4Name.c_str()); |
| |
| // x coord is: (-b + params[5] * sqrt(b^2-4ac)) * params[1] |
| // y coord is 0.5 (texture is effectively 1D) |
| sampleCoords.printf("vec2((-%s + %s[5] * %s) * %s[1], 0.5)", |
| bVar.c_str(), radial2ParamsName.c_str(), |
| rootName.c_str(), radial2ParamsName.c_str()); |
| complexCoord = true; |
| break;} |
| }; |
| |
| const char* smear; |
| if (desc.fModulation == ProgramDesc::StageDesc::kAlpha_Modulation) { |
| smear = ".aaaa"; |
| } else { |
| smear = ""; |
| } |
| GrStringBuilder modulate; |
| if (NULL != fsInColor) { |
| modulate.printf(" * %s", fsInColor); |
| } |
| |
| if (ProgramDesc::StageDesc::k2x2_FetchMode == desc.fFetchMode) { |
| locations->fNormalizedTexelSizeUni = kUseUniform; |
| if (complexCoord) { |
| // assign the coord to a var rather than compute 4x. |
| GrStringBuilder coordVar("tCoord"); |
| coordVar.appendS32(stageNum); |
| segments->fFSCode.appendf("\t%s %s = %s;\n", |
| float_vector_type(coordDims), |
| coordVar.c_str(), sampleCoords.c_str()); |
| sampleCoords = coordVar; |
| } |
| GrAssert(2 == coordDims); |
| GrStringBuilder accumVar("accum"); |
| accumVar.appendS32(stageNum); |
| segments->fFSCode.appendf("\tvec4 %s = %s(%s, %s + vec2(-%s.x,-%s.y))%s;\n", accumVar.c_str(), texFunc.c_str(), samplerName.c_str(), sampleCoords.c_str(), texelSizeName.c_str(), texelSizeName.c_str(), smear); |
| segments->fFSCode.appendf("\t%s += %s(%s, %s + vec2(+%s.x,-%s.y))%s;\n", accumVar.c_str(), texFunc.c_str(), samplerName.c_str(), sampleCoords.c_str(), texelSizeName.c_str(), texelSizeName.c_str(), smear); |
| segments->fFSCode.appendf("\t%s += %s(%s, %s + vec2(-%s.x,+%s.y))%s;\n", accumVar.c_str(), texFunc.c_str(), samplerName.c_str(), sampleCoords.c_str(), texelSizeName.c_str(), texelSizeName.c_str(), smear); |
| segments->fFSCode.appendf("\t%s += %s(%s, %s + vec2(+%s.x,+%s.y))%s;\n", accumVar.c_str(), texFunc.c_str(), samplerName.c_str(), sampleCoords.c_str(), texelSizeName.c_str(), texelSizeName.c_str(), smear); |
| segments->fFSCode.appendf("\t%s = .25 * %s%s;\n", fsOutColor, accumVar.c_str(), modulate.c_str()); |
| } else { |
| segments->fFSCode.appendf("\t%s = %s(%s, %s)%s %s;\n", fsOutColor, texFunc.c_str(), samplerName.c_str(), sampleCoords.c_str(), smear, modulate.c_str()); |
| } |
| |
| if(fStageEffects[stageNum]) { |
| fStageEffects[stageNum]->genShaderCode(segments); |
| } |
| } |
| |
