| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrGLProgram.h" |
| |
| #include "GrAllocator.h" |
| #include "GrEffect.h" |
| #include "GrGLEffect.h" |
| #include "GrGpuGL.h" |
| #include "GrGLShaderVar.h" |
| #include "GrBackendEffectFactory.h" |
| #include "SkTrace.h" |
| #include "SkXfermode.h" |
| |
| #include "SkRTConf.h" |
| |
| SK_DEFINE_INST_COUNT(GrGLProgram) |
| |
| #define GL_CALL(X) GR_GL_CALL(fContext.interface(), X) |
| #define GL_CALL_RET(R, X) GR_GL_CALL_RET(fContext.interface(), R, X) |
| |
| SK_CONF_DECLARE(bool, c_PrintShaders, "gpu.printShaders", false, "Print the source code for all shaders generated."); |
| |
| #define TEX_ATTR_NAME "aTexCoord" |
| #define COL_ATTR_NAME "aColor" |
| #define COV_ATTR_NAME "aCoverage" |
| #define EDGE_ATTR_NAME "aEdge" |
| |
| namespace { |
| inline const char* declared_color_output_name() { return "fsColorOut"; } |
| inline const char* dual_source_output_name() { return "dualSourceOut"; } |
| } |
| |
| void GrGLProgram::BuildDesc(const GrDrawState& drawState, |
| bool isPoints, |
| GrDrawState::BlendOptFlags blendOpts, |
| GrBlendCoeff srcCoeff, |
| GrBlendCoeff dstCoeff, |
| const GrGpuGL* gpu, |
| Desc* desc) { |
| |
| // This should already have been caught |
| GrAssert(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts)); |
| |
| bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag); |
| |
| bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag | |
| GrDrawState::kEmitCoverage_BlendOptFlag)); |
| |
| // The descriptor is used as a cache key. Thus when a field of the |
| // descriptor will not affect program generation (because of the vertex |
| // layout in use or other descriptor field settings) it should be set |
| // to a canonical value to avoid duplicate programs with different keys. |
| |
| // Must initialize all fields or cache will have false negatives! |
| desc->fVertexLayout = drawState.getVertexLayout(); |
| |
| desc->fEmitsPointSize = isPoints; |
| |
| bool requiresAttributeColors = !skipColor && |
| SkToBool(desc->fVertexLayout & GrDrawState::kColor_VertexLayoutBit); |
| bool requiresAttributeCoverage = !skipCoverage && |
| SkToBool(desc->fVertexLayout & GrDrawState::kCoverage_VertexLayoutBit); |
| |
| // fColorInput/fCoverageInput records how colors are specified for the program So we strip the |
| // bits from the layout to avoid false negatives when searching for an existing program in the |
| // cache. |
| desc->fVertexLayout &= ~(GrDrawState::kColor_VertexLayoutBit | GrDrawState::kCoverage_VertexLayoutBit); |
| |
| desc->fColorFilterXfermode = skipColor ? |
| SkXfermode::kDst_Mode : |
| drawState.getColorFilterMode(); |
| |
| // no reason to do edge aa or look at per-vertex coverage if coverage is ignored |
| if (skipCoverage) { |
| desc->fVertexLayout &= ~(GrDrawState::kEdge_VertexLayoutBit | |
| GrDrawState::kCoverage_VertexLayoutBit); |
| } |
| |
| bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag); |
| bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) || |
| (!requiresAttributeColors && 0xffffffff == drawState.getColor()); |
| if (colorIsTransBlack) { |
| desc->fColorInput = Desc::kTransBlack_ColorInput; |
| } else if (colorIsSolidWhite) { |
| desc->fColorInput = Desc::kSolidWhite_ColorInput; |
| } else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeColors) { |
| desc->fColorInput = Desc::kUniform_ColorInput; |
| } else { |
| desc->fColorInput = Desc::kAttribute_ColorInput; |
| } |
| |
| bool covIsSolidWhite = !requiresAttributeCoverage && 0xffffffff == drawState.getCoverage(); |
| |
| if (skipCoverage) { |
| desc->fCoverageInput = Desc::kTransBlack_ColorInput; |
| } else if (covIsSolidWhite) { |
| desc->fCoverageInput = Desc::kSolidWhite_ColorInput; |
| } else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeCoverage) { |
| desc->fCoverageInput = Desc::kUniform_ColorInput; |
| } else { |
| desc->fCoverageInput = Desc::kAttribute_ColorInput; |
| } |
| |
| int lastEnabledStage = -1; |
| |
| if (!skipCoverage && (desc->fVertexLayout & GrDrawState::kEdge_VertexLayoutBit)) { |
| desc->fVertexEdgeType = drawState.getVertexEdgeType(); |
| desc->fDiscardIfOutsideEdge = drawState.getStencil().doesWrite(); |
| } else { |
| // Use canonical values when edge-aa is not enabled to avoid program cache misses. |
| desc->fVertexEdgeType = GrDrawState::kHairLine_EdgeType; |
| desc->fDiscardIfOutsideEdge = false; |
| } |
| |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| |
| bool skip = s < drawState.getFirstCoverageStage() ? skipColor : skipCoverage; |
| if (!skip && drawState.isStageEnabled(s)) { |
| lastEnabledStage = s; |
| const GrEffectRef& effect = *drawState.getStage(s).getEffect(); |
| const GrBackendEffectFactory& factory = effect->getFactory(); |
| desc->fEffectKeys[s] = factory.glEffectKey(drawState.getStage(s), gpu->glCaps()); |
| } else { |
| desc->fEffectKeys[s] = 0; |
| } |
| } |
| |
| desc->fDualSrcOutput = Desc::kNone_DualSrcOutput; |
| |
| // Currently the experimental GS will only work with triangle prims (and it doesn't do anything |
| // other than pass through values from the VS to the FS anyway). |
| #if GR_GL_EXPERIMENTAL_GS |
| #if 0 |
| desc->fExperimentalGS = gpu->getCaps().geometryShaderSupport(); |
| #else |
| desc->fExperimentalGS = false; |
| #endif |
| #endif |
| |
| // We want to avoid generating programs with different "first cov stage" values when they would |
| // compute the same result. We set field in the desc to kNumStages when either there are no |
| // coverage stages or the distinction between coverage and color is immaterial. |
| int firstCoverageStage = GrDrawState::kNumStages; |
| desc->fFirstCoverageStage = GrDrawState::kNumStages; |
| bool hasCoverage = drawState.getFirstCoverageStage() <= lastEnabledStage; |
| if (hasCoverage) { |
| firstCoverageStage = drawState.getFirstCoverageStage(); |
| } |
| |
| // other coverage inputs |
| if (!hasCoverage) { |
| hasCoverage = requiresAttributeCoverage || |
| (desc->fVertexLayout & GrDrawState::kEdge_VertexLayoutBit); |
| } |
| |
| if (hasCoverage) { |
| // color filter is applied between color/coverage computation |
| if (SkXfermode::kDst_Mode != desc->fColorFilterXfermode) { |
| desc->fFirstCoverageStage = firstCoverageStage; |
| } |
| |
| if (gpu->getCaps().dualSourceBlendingSupport() && |
| !(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag | |
| GrDrawState::kCoverageAsAlpha_BlendOptFlag))) { |
| if (kZero_GrBlendCoeff == dstCoeff) { |
| // write the coverage value to second color |
| desc->fDualSrcOutput = Desc::kCoverage_DualSrcOutput; |
| desc->fFirstCoverageStage = firstCoverageStage; |
| } else if (kSA_GrBlendCoeff == dstCoeff) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| desc->fDualSrcOutput = Desc::kCoverageISA_DualSrcOutput; |
| desc->fFirstCoverageStage = firstCoverageStage; |
| } else if (kSC_GrBlendCoeff == dstCoeff) { |
| // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered. |
| desc->fDualSrcOutput = Desc::kCoverageISC_DualSrcOutput; |
| desc->fFirstCoverageStage = firstCoverageStage; |
| } |
| } |
| } |
| } |
| |
| GrGLProgram* GrGLProgram::Create(const GrGLContext& gl, |
| const Desc& desc, |
| const GrEffectStage* stages[]) { |
| GrGLProgram* program = SkNEW_ARGS(GrGLProgram, (gl, desc, stages)); |
| if (!program->succeeded()) { |
| delete program; |
| program = NULL; |
| } |
| return program; |
| } |
| |
| GrGLProgram::GrGLProgram(const GrGLContext& gl, |
| const Desc& desc, |
| const GrEffectStage* stages[]) |
| : fContext(gl) |
| , fUniformManager(gl) { |
| fDesc = desc; |
| fVShaderID = 0; |
| fGShaderID = 0; |
| fFShaderID = 0; |
| fProgramID = 0; |
| |
| fColor = GrColor_ILLEGAL; |
| fColorFilterColor = GrColor_ILLEGAL; |
| |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| fEffects[s] = NULL; |
| } |
| |
| this->genProgram(stages); |
| } |
| |
| GrGLProgram::~GrGLProgram() { |
| if (fVShaderID) { |
| GL_CALL(DeleteShader(fVShaderID)); |
| } |
| if (fGShaderID) { |
| GL_CALL(DeleteShader(fGShaderID)); |
| } |
| if (fFShaderID) { |
| GL_CALL(DeleteShader(fFShaderID)); |
| } |
| if (fProgramID) { |
| GL_CALL(DeleteProgram(fProgramID)); |
| } |
| |
| for (int i = 0; i < GrDrawState::kNumStages; ++i) { |
| delete fEffects[i]; |
| } |
| } |
| |
| void GrGLProgram::abandon() { |
| fVShaderID = 0; |
| fGShaderID = 0; |
| fFShaderID = 0; |
| fProgramID = 0; |
| } |
| |
| void GrGLProgram::overrideBlend(GrBlendCoeff* srcCoeff, |
| GrBlendCoeff* dstCoeff) const { |
| switch (fDesc.fDualSrcOutput) { |
| case Desc::kNone_DualSrcOutput: |
| break; |
| // the prog will write a coverage value to the secondary |
| // output and the dst is blended by one minus that value. |
| case Desc::kCoverage_DualSrcOutput: |
| case Desc::kCoverageISA_DualSrcOutput: |
| case Desc::kCoverageISC_DualSrcOutput: |
| *dstCoeff = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff; |
| break; |
| default: |
| GrCrash("Unexpected dual source blend output"); |
| break; |
| } |
| } |
| |
| namespace { |
| |
| // given two blend coeffecients determine whether the src |
| // and/or dst computation can be omitted. |
| inline void need_blend_inputs(SkXfermode::Coeff srcCoeff, |
| SkXfermode::Coeff dstCoeff, |
| bool* needSrcValue, |
| bool* needDstValue) { |
| if (SkXfermode::kZero_Coeff == srcCoeff) { |
| switch (dstCoeff) { |
| // these all read the src |
| case SkXfermode::kSC_Coeff: |
| case SkXfermode::kISC_Coeff: |
| case SkXfermode::kSA_Coeff: |
| case SkXfermode::kISA_Coeff: |
| *needSrcValue = true; |
| break; |
| default: |
| *needSrcValue = false; |
| break; |
| } |
| } else { |
| *needSrcValue = true; |
| } |
| if (SkXfermode::kZero_Coeff == dstCoeff) { |
| switch (srcCoeff) { |
| // these all read the dst |
| case SkXfermode::kDC_Coeff: |
| case SkXfermode::kIDC_Coeff: |
| case SkXfermode::kDA_Coeff: |
| case SkXfermode::kIDA_Coeff: |
| *needDstValue = true; |
| break; |
| default: |
| *needDstValue = false; |
| break; |
| } |
| } else { |
| *needDstValue = true; |
| } |
| } |
| |
| /** |
| * Create a blend_coeff * value string to be used in shader code. Sets empty |
| * string if result is trivially zero. |
| */ |
| inline void blend_term_string(SkString* str, SkXfermode::Coeff coeff, |
| const char* src, const char* dst, |
| const char* value) { |
| switch (coeff) { |
| case SkXfermode::kZero_Coeff: /** 0 */ |
| *str = ""; |
| break; |
| case SkXfermode::kOne_Coeff: /** 1 */ |
| *str = value; |
| break; |
| case SkXfermode::kSC_Coeff: |
| str->printf("(%s * %s)", src, value); |
| break; |
| case SkXfermode::kISC_Coeff: |
| str->printf("((%s - %s) * %s)", GrGLSLOnesVecf(4), src, value); |
| break; |
| case SkXfermode::kDC_Coeff: |
| str->printf("(%s * %s)", dst, value); |
| break; |
| case SkXfermode::kIDC_Coeff: |
| str->printf("((%s - %s) * %s)", GrGLSLOnesVecf(4), dst, value); |
| break; |
| case SkXfermode::kSA_Coeff: /** src alpha */ |
| str->printf("(%s.a * %s)", src, value); |
| break; |
| case SkXfermode::kISA_Coeff: /** inverse src alpha (i.e. 1 - sa) */ |
| str->printf("((1.0 - %s.a) * %s)", src, value); |
| break; |
| case SkXfermode::kDA_Coeff: /** dst alpha */ |
| str->printf("(%s.a * %s)", dst, value); |
| break; |
| case SkXfermode::kIDA_Coeff: /** inverse dst alpha (i.e. 1 - da) */ |
| str->printf("((1.0 - %s.a) * %s)", dst, value); |
| break; |
| default: |
| GrCrash("Unexpected xfer coeff."); |
| break; |
| } |
| } |
| /** |
| * Adds a line to the fragment shader code which modifies the color by |
| * the specified color filter. |
| */ |
| void add_color_filter(SkString* fsCode, const char * outputVar, |
| SkXfermode::Coeff uniformCoeff, |
| SkXfermode::Coeff colorCoeff, |
| const char* filterColor, |
| const char* inColor) { |
| SkString colorStr, constStr; |
| blend_term_string(&colorStr, colorCoeff, filterColor, inColor, inColor); |
| blend_term_string(&constStr, uniformCoeff, filterColor, inColor, filterColor); |
| |
| fsCode->appendf("\t%s = ", outputVar); |
| GrGLSLAdd4f(fsCode, colorStr.c_str(), constStr.c_str()); |
| fsCode->append(";\n"); |
| } |
| } |
| |
| bool GrGLProgram::genEdgeCoverage(SkString* coverageVar, |
| GrGLShaderBuilder* builder) const { |
| if (fDesc.fVertexLayout & GrDrawState::kEdge_VertexLayoutBit) { |
| const char *vsName, *fsName; |
| builder->addVarying(kVec4f_GrSLType, "Edge", &vsName, &fsName); |
| builder->fVSAttrs.push_back().set(kVec4f_GrSLType, |
| GrGLShaderVar::kAttribute_TypeModifier, |
| EDGE_ATTR_NAME); |
| builder->fVSCode.appendf("\t%s = " EDGE_ATTR_NAME ";\n", vsName); |
| switch (fDesc.fVertexEdgeType) { |
| case GrDrawState::kHairLine_EdgeType: |
| builder->fFSCode.appendf("\tfloat edgeAlpha = abs(dot(vec3(%s.xy,1), %s.xyz));\n", builder->fragmentPosition(), fsName); |
| builder->fFSCode.append("\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); |
| break; |
| case GrDrawState::kQuad_EdgeType: |
| builder->fFSCode.append("\tfloat edgeAlpha;\n"); |
| // keep the derivative instructions outside the conditional |
| builder->fFSCode.appendf("\tvec2 duvdx = dFdx(%s.xy);\n", fsName); |
| builder->fFSCode.appendf("\tvec2 duvdy = dFdy(%s.xy);\n", fsName); |
| builder->fFSCode.appendf("\tif (%s.z > 0.0 && %s.w > 0.0) {\n", fsName, fsName); |
| // today we know z and w are in device space. We could use derivatives |
| builder->fFSCode.appendf("\t\tedgeAlpha = min(min(%s.z, %s.w) + 0.5, 1.0);\n", fsName, fsName); |
| builder->fFSCode.append ("\t} else {\n"); |
| builder->fFSCode.appendf("\t\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" |
| "\t\t 2.0*%s.x*duvdy.x - duvdy.y);\n", |
| fsName, fsName); |
| builder->fFSCode.appendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, fsName); |
| builder->fFSCode.append("\t\tedgeAlpha = clamp(0.5 - edgeAlpha / length(gF), 0.0, 1.0);\n" |
| "\t}\n"); |
| if (kES2_GrGLBinding == fContext.info().binding()) { |
| builder->fHeader.printf("#extension GL_OES_standard_derivatives: enable\n"); |
| } |
| break; |
| case GrDrawState::kHairQuad_EdgeType: |
| builder->fFSCode.appendf("\tvec2 duvdx = dFdx(%s.xy);\n", fsName); |
| builder->fFSCode.appendf("\tvec2 duvdy = dFdy(%s.xy);\n", fsName); |
| builder->fFSCode.appendf("\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" |
| "\t 2.0*%s.x*duvdy.x - duvdy.y);\n", |
| fsName, fsName); |
| builder->fFSCode.appendf("\tfloat edgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, fsName); |
| builder->fFSCode.append("\tedgeAlpha = sqrt(edgeAlpha*edgeAlpha / dot(gF, gF));\n"); |
| builder->fFSCode.append("\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); |
| if (kES2_GrGLBinding == fContext.info().binding()) { |
| builder->fHeader.printf("#extension GL_OES_standard_derivatives: enable\n"); |
| } |
| break; |
| case GrDrawState::kCircle_EdgeType: |
| builder->fFSCode.append("\tfloat edgeAlpha;\n"); |
| builder->fFSCode.appendf("\tfloat d = distance(%s.xy, %s.xy);\n", builder->fragmentPosition(), fsName); |
| builder->fFSCode.appendf("\tfloat outerAlpha = smoothstep(d - 0.5, d + 0.5, %s.z);\n", fsName); |
| builder->fFSCode.appendf("\tfloat innerAlpha = %s.w == 0.0 ? 1.0 : smoothstep(%s.w - 0.5, %s.w + 0.5, d);\n", fsName, fsName, fsName); |
| builder->fFSCode.append("\tedgeAlpha = outerAlpha * innerAlpha;\n"); |
| break; |
| case GrDrawState::kEllipse_EdgeType: |
| builder->fFSCode.append("\tfloat edgeAlpha;\n"); |
| builder->fFSCode.appendf("\tvec2 offset = (%s.xy - %s.xy);\n", builder->fragmentPosition(), fsName); |
| builder->fFSCode.appendf("\toffset.y *= %s.w;\n", fsName); |
| builder->fFSCode.append("\tfloat d = length(offset);\n"); |
| builder->fFSCode.appendf("\tedgeAlpha = smoothstep(d - 0.5, d + 0.5, %s.z);\n", fsName); |
| break; |
| default: |
| GrCrash("Unknown Edge Type!"); |
| break; |
| } |
| if (fDesc.fDiscardIfOutsideEdge) { |
| builder->fFSCode.appendf("\tif (edgeAlpha <= 0.0) {\n\t\tdiscard;\n\t}\n"); |
| } |
| *coverageVar = "edgeAlpha"; |
| return true; |
| } else { |
| coverageVar->reset(); |
| return false; |
| } |
| } |
| |
| void GrGLProgram::genInputColor(GrGLShaderBuilder* builder, SkString* inColor) { |
| switch (fDesc.fColorInput) { |
| case GrGLProgram::Desc::kAttribute_ColorInput: { |
| builder->fVSAttrs.push_back().set(kVec4f_GrSLType, |
| GrGLShaderVar::kAttribute_TypeModifier, |
| COL_ATTR_NAME); |
| const char *vsName, *fsName; |
| builder->addVarying(kVec4f_GrSLType, "Color", &vsName, &fsName); |
| builder->fVSCode.appendf("\t%s = " COL_ATTR_NAME ";\n", vsName); |
| *inColor = fsName; |
| } break; |
| case GrGLProgram::Desc::kUniform_ColorInput: { |
| const char* name; |
| fUniformHandles.fColorUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec4f_GrSLType, "Color", &name); |
| *inColor = name; |
| break; |
| } |
| case GrGLProgram::Desc::kTransBlack_ColorInput: |
| GrAssert(!"needComputedColor should be false."); |
| break; |
| case GrGLProgram::Desc::kSolidWhite_ColorInput: |
| break; |
| default: |
| GrCrash("Unknown color type."); |
| break; |
| } |
| } |
| |
| void GrGLProgram::genUniformCoverage(GrGLShaderBuilder* builder, SkString* inOutCoverage) { |
| const char* covUniName; |
| fUniformHandles.fCoverageUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec4f_GrSLType, "Coverage", &covUniName); |
| if (inOutCoverage->size()) { |
| builder->fFSCode.appendf("\tvec4 uniCoverage = %s * %s;\n", |
| covUniName, inOutCoverage->c_str()); |
| *inOutCoverage = "uniCoverage"; |
| } else { |
| *inOutCoverage = covUniName; |
| } |
| } |
| |
| namespace { |
| void gen_attribute_coverage(GrGLShaderBuilder* segments, |
| SkString* inOutCoverage) { |
| segments->fVSAttrs.push_back().set(kVec4f_GrSLType, |
| GrGLShaderVar::kAttribute_TypeModifier, |
| COV_ATTR_NAME); |
| const char *vsName, *fsName; |
| segments->addVarying(kVec4f_GrSLType, "Coverage", &vsName, &fsName); |
| segments->fVSCode.appendf("\t%s = " COV_ATTR_NAME ";\n", vsName); |
| if (inOutCoverage->size()) { |
| segments->fFSCode.appendf("\tvec4 attrCoverage = %s * %s;\n", |
| fsName, inOutCoverage->c_str()); |
| *inOutCoverage = "attrCoverage"; |
| } else { |
| *inOutCoverage = fsName; |
| } |
| } |
| } |
| |
| void GrGLProgram::genGeometryShader(GrGLShaderBuilder* segments) const { |
| #if GR_GL_EXPERIMENTAL_GS |
| if (fDesc.fExperimentalGS) { |
| GrAssert(fContext.info().glslGeneration() >= k150_GrGLSLGeneration); |
| segments->fGSHeader.append("layout(triangles) in;\n" |
| "layout(triangle_strip, max_vertices = 6) out;\n"); |
| segments->fGSCode.append("\tfor (int i = 0; i < 3; ++i) {\n" |
| "\t\tgl_Position = gl_in[i].gl_Position;\n"); |
| if (fDesc.fEmitsPointSize) { |
| segments->fGSCode.append("\t\tgl_PointSize = 1.0;\n"); |
| } |
| GrAssert(segments->fGSInputs.count() == segments->fGSOutputs.count()); |
| int count = segments->fGSInputs.count(); |
| for (int i = 0; i < count; ++i) { |
| segments->fGSCode.appendf("\t\t%s = %s[i];\n", |
| segments->fGSOutputs[i].getName().c_str(), |
| segments->fGSInputs[i].getName().c_str()); |
| } |
| segments->fGSCode.append("\t\tEmitVertex();\n" |
| "\t}\n" |
| "\tEndPrimitive();\n"); |
| } |
| #endif |
| } |
| |
| const char* GrGLProgram::adjustInColor(const SkString& inColor) const { |
| if (inColor.size()) { |
| return inColor.c_str(); |
| } else { |
| if (Desc::kSolidWhite_ColorInput == fDesc.fColorInput) { |
| return GrGLSLOnesVecf(4); |
| } else { |
| return GrGLSLZerosVecf(4); |
| } |
| } |
| } |
| |
| namespace { |
| // prints a shader using params similar to glShaderSource |
| void print_shader(GrGLint stringCnt, |
| const GrGLchar** strings, |
| GrGLint* stringLengths) { |
| for (int i = 0; i < stringCnt; ++i) { |
| if (NULL == stringLengths || stringLengths[i] < 0) { |
| GrPrintf(strings[i]); |
| } else { |
| GrPrintf("%.*s", stringLengths[i], strings[i]); |
| } |
| } |
| } |
| |
| // Compiles a GL shader, returns shader ID or 0 if failed params have same meaning as glShaderSource |
| GrGLuint compile_shader(const GrGLContext& gl, |
| GrGLenum type, |
| int stringCnt, |
| const char** strings, |
| int* stringLengths) { |
| SK_TRACE_EVENT1("GrGLProgram::CompileShader", |
| "stringCount", SkStringPrintf("%i", stringCnt).c_str()); |
| |
| GrGLuint shader; |
| GR_GL_CALL_RET(gl.interface(), shader, CreateShader(type)); |
| if (0 == shader) { |
| return 0; |
| } |
| |
| const GrGLInterface* gli = gl.interface(); |
| GrGLint compiled = GR_GL_INIT_ZERO; |
| GR_GL_CALL(gli, ShaderSource(shader, stringCnt, strings, stringLengths)); |
| GR_GL_CALL(gli, CompileShader(shader)); |
| GR_GL_CALL(gli, GetShaderiv(shader, GR_GL_COMPILE_STATUS, &compiled)); |
| |
| if (!compiled) { |
| GrGLint infoLen = GR_GL_INIT_ZERO; |
| GR_GL_CALL(gli, GetShaderiv(shader, GR_GL_INFO_LOG_LENGTH, &infoLen)); |
| SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger |
| if (infoLen > 0) { |
| // retrieve length even though we don't need it to workaround bug in chrome cmd buffer |
| // param validation. |
| GrGLsizei length = GR_GL_INIT_ZERO; |
| GR_GL_CALL(gli, GetShaderInfoLog(shader, infoLen+1, |
| &length, (char*)log.get())); |
| print_shader(stringCnt, strings, stringLengths); |
| GrPrintf("\n%s", log.get()); |
| } |
| GrAssert(!"Shader compilation failed!"); |
| GR_GL_CALL(gli, DeleteShader(shader)); |
| return 0; |
| } |
| return shader; |
| } |
| |
| // helper version of above for when shader is already flattened into a single SkString |
| GrGLuint compile_shader(const GrGLContext& gl, GrGLenum type, const SkString& shader) { |
| const GrGLchar* str = shader.c_str(); |
| int length = shader.size(); |
| return compile_shader(gl, type, 1, &str, &length); |
| } |
| |
| } |
| |
| // compiles all the shaders from builder and stores the shader IDs |
| bool GrGLProgram::compileShaders(const GrGLShaderBuilder& builder) { |
| |
| SkString shader; |
| |
| builder.getShader(GrGLShaderBuilder::kVertex_ShaderType, &shader); |
| if (c_PrintShaders) { |
| GrPrintf(shader.c_str()); |
| GrPrintf("\n"); |
| } |
| |
| if (!(fVShaderID = compile_shader(fContext, GR_GL_VERTEX_SHADER, shader))) { |
| return false; |
| } |
| |
| if (builder.fUsesGS) { |
| builder.getShader(GrGLShaderBuilder::kGeometry_ShaderType, &shader); |
| if (c_PrintShaders) { |
| GrPrintf(shader.c_str()); |
| GrPrintf("\n"); |
| } |
| if (!(fGShaderID = compile_shader(fContext, GR_GL_GEOMETRY_SHADER, shader))) { |
| return false; |
| } |
| } else { |
| fGShaderID = 0; |
| } |
| |
| builder.getShader(GrGLShaderBuilder::kFragment_ShaderType, &shader); |
| if (c_PrintShaders) { |
| GrPrintf(shader.c_str()); |
| GrPrintf("\n"); |
| } |
| if (!(fFShaderID = compile_shader(fContext, GR_GL_FRAGMENT_SHADER, shader))) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool GrGLProgram::genProgram(const GrEffectStage* stages[]) { |
| GrAssert(0 == fProgramID); |
| |
| GrGLShaderBuilder builder(fContext.info(), fUniformManager); |
| const uint32_t& layout = fDesc.fVertexLayout; |
| |
| #if GR_GL_EXPERIMENTAL_GS |
| builder.fUsesGS = fDesc.fExperimentalGS; |
| #endif |
| |
| SkXfermode::Coeff colorCoeff, uniformCoeff; |
| // The rest of transfer mode color filters have not been implemented |
| if (fDesc.fColorFilterXfermode < SkXfermode::kCoeffModesCnt) { |
| GR_DEBUGCODE(bool success =) |
| SkXfermode::ModeAsCoeff(static_cast<SkXfermode::Mode> |
| (fDesc.fColorFilterXfermode), |
| &uniformCoeff, &colorCoeff); |
| GR_DEBUGASSERT(success); |
| } else { |
| colorCoeff = SkXfermode::kOne_Coeff; |
| uniformCoeff = SkXfermode::kZero_Coeff; |
| } |
| |
| // no need to do the color filter if coverage is 0. The output color is scaled by the coverage. |
| // All the dual source outputs are scaled by the coverage as well. |
| if (Desc::kTransBlack_ColorInput == fDesc.fCoverageInput) { |
| colorCoeff = SkXfermode::kZero_Coeff; |
| uniformCoeff = SkXfermode::kZero_Coeff; |
| } |
| |
| // If we know the final color is going to be all zeros then we can |
| // simplify the color filter coefficients. needComputedColor will then |
| // come out false below. |
| if (Desc::kTransBlack_ColorInput == fDesc.fColorInput) { |
| colorCoeff = SkXfermode::kZero_Coeff; |
| if (SkXfermode::kDC_Coeff == uniformCoeff || |
| SkXfermode::kDA_Coeff == uniformCoeff) { |
| uniformCoeff = SkXfermode::kZero_Coeff; |
| } else if (SkXfermode::kIDC_Coeff == uniformCoeff || |
| SkXfermode::kIDA_Coeff == uniformCoeff) { |
| uniformCoeff = SkXfermode::kOne_Coeff; |
| } |
| } |
| |
| bool needColorFilterUniform; |
| bool needComputedColor; |
| need_blend_inputs(uniformCoeff, colorCoeff, |
| &needColorFilterUniform, &needComputedColor); |
| |
| // the dual source output has no canonical var name, have to |
| // declare an output, which is incompatible with gl_FragColor/gl_FragData. |
| bool dualSourceOutputWritten = false; |
| builder.fHeader.append(GrGetGLSLVersionDecl(fContext.info().binding(), |
| fContext.info().glslGeneration())); |
| |
| GrGLShaderVar colorOutput; |
| bool isColorDeclared = GrGLSLSetupFSColorOuput(fContext.info().glslGeneration(), |
| declared_color_output_name(), |
| &colorOutput); |
| if (isColorDeclared) { |
| builder.fFSOutputs.push_back(colorOutput); |
| } |
| |
| const char* viewMName; |
| fUniformHandles.fViewMatrixUni = builder.addUniform(GrGLShaderBuilder::kVertex_ShaderType, |
| kMat33f_GrSLType, "ViewM", &viewMName); |
| |
| |
| builder.fVSCode.appendf("\tvec3 pos3 = %s * vec3(%s, 1);\n" |
| "\tgl_Position = vec4(pos3.xy, 0, pos3.z);\n", |
| viewMName, builder.positionAttribute().getName().c_str()); |
| |
| // incoming color to current stage being processed. |
| SkString inColor; |
| |
| if (needComputedColor) { |
| this->genInputColor(&builder, &inColor); |
| } |
| |
| // we output point size in the GS if present |
| if (fDesc.fEmitsPointSize && !builder.fUsesGS){ |
| builder.fVSCode.append("\tgl_PointSize = 1.0;\n"); |
| } |
| |
| // add texture coordinates that are used to the list of vertex attr decls |
| if (GrDrawState::VertexUsesTexCoords(layout)) { |
| builder.fVSAttrs.push_back().set(kVec2f_GrSLType, |
| GrGLShaderVar::kAttribute_TypeModifier, |
| TEX_ATTR_NAME); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // compute the final color |
| |
| // if we have color stages string them together, feeding the output color |
| // of each to the next and generating code for each stage. |
| if (needComputedColor) { |
| SkString outColor; |
| for (int s = 0; s < fDesc.fFirstCoverageStage; ++s) { |
| if (GrGLEffect::kNoEffectKey != fDesc.fEffectKeys[s]) { |
| // create var to hold stage result |
| outColor = "color"; |
| outColor.appendS32(s); |
| builder.fFSCode.appendf("\tvec4 %s;\n", outColor.c_str()); |
| |
| const char* inCoords; |
| // figure out what our input coords are |
| if (!GrDrawState::StageUsesTexCoords(layout, s)) { |
| inCoords = builder.positionAttribute().c_str(); |
| } else { |
| // must have input tex coordinates if stage is enabled. |
| inCoords = TEX_ATTR_NAME; |
| } |
| |
| builder.setCurrentStage(s); |
| fEffects[s] = builder.createAndEmitGLEffect(*stages[s], |
| fDesc.fEffectKeys[s], |
| inColor.size() ? inColor.c_str() : NULL, |
| outColor.c_str(), |
| inCoords, |
| &fUniformHandles.fSamplerUnis[s]); |
| builder.setNonStage(); |
| inColor = outColor; |
| } |
| } |
| } |
| |
| // if have all ones or zeros for the "dst" input to the color filter then we |
| // may be able to make additional optimizations. |
| if (needColorFilterUniform && needComputedColor && !inColor.size()) { |
| GrAssert(Desc::kSolidWhite_ColorInput == fDesc.fColorInput); |
| bool uniformCoeffIsZero = SkXfermode::kIDC_Coeff == uniformCoeff || |
| SkXfermode::kIDA_Coeff == uniformCoeff; |
| if (uniformCoeffIsZero) { |
| uniformCoeff = SkXfermode::kZero_Coeff; |
| bool bogus; |
| need_blend_inputs(SkXfermode::kZero_Coeff, colorCoeff, |
| &needColorFilterUniform, &bogus); |
| } |
| } |
| const char* colorFilterColorUniName = NULL; |
| if (needColorFilterUniform) { |
| fUniformHandles.fColorFilterUni = builder.addUniform( |
| GrGLShaderBuilder::kFragment_ShaderType, |
| kVec4f_GrSLType, "FilterColor", |
| &colorFilterColorUniName); |
| } |
| bool wroteFragColorZero = false; |
| if (SkXfermode::kZero_Coeff == uniformCoeff && |
| SkXfermode::kZero_Coeff == colorCoeff) { |
| builder.fFSCode.appendf("\t%s = %s;\n", |
| colorOutput.getName().c_str(), |
| GrGLSLZerosVecf(4)); |
| wroteFragColorZero = true; |
| } else if (SkXfermode::kDst_Mode != fDesc.fColorFilterXfermode) { |
| builder.fFSCode.append("\tvec4 filteredColor;\n"); |
| const char* color = adjustInColor(inColor); |
| add_color_filter(&builder.fFSCode, "filteredColor", uniformCoeff, |
| colorCoeff, colorFilterColorUniName, color); |
| inColor = "filteredColor"; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // compute the partial coverage (coverage stages and edge aa) |
| |
| SkString inCoverage; |
| bool coverageIsZero = Desc::kTransBlack_ColorInput == fDesc.fCoverageInput; |
| // we don't need to compute coverage at all if we know the final shader |
| // output will be zero and we don't have a dual src blend output. |
| if (!wroteFragColorZero || Desc::kNone_DualSrcOutput != fDesc.fDualSrcOutput) { |
| |
| if (!coverageIsZero) { |
| bool inCoverageIsScalar = this->genEdgeCoverage(&inCoverage, &builder); |
| |
| switch (fDesc.fCoverageInput) { |
| case Desc::kSolidWhite_ColorInput: |
| // empty string implies solid white |
| break; |
| case Desc::kAttribute_ColorInput: |
| gen_attribute_coverage(&builder, &inCoverage); |
| inCoverageIsScalar = false; |
| break; |
| case Desc::kUniform_ColorInput: |
| this->genUniformCoverage(&builder, &inCoverage); |
| inCoverageIsScalar = false; |
| break; |
| default: |
| GrCrash("Unexpected input coverage."); |
| } |
| |
| SkString outCoverage; |
| const int& startStage = fDesc.fFirstCoverageStage; |
| for (int s = startStage; s < GrDrawState::kNumStages; ++s) { |
| if (fDesc.fEffectKeys[s]) { |
| // create var to hold stage output |
| outCoverage = "coverage"; |
| outCoverage.appendS32(s); |
| builder.fFSCode.appendf("\tvec4 %s;\n", outCoverage.c_str()); |
| |
| const char* inCoords; |
| // figure out what our input coords are |
| if (!GrDrawState::StageUsesTexCoords(layout, s)) { |
| inCoords = builder.positionAttribute().c_str(); |
| } else { |
| // must have input tex coordinates if stage is |
| // enabled. |
| inCoords = TEX_ATTR_NAME; |
| } |
| |
| // stages don't know how to deal with a scalar input. (Maybe they should. We |
| // could pass a GrGLShaderVar) |
| if (inCoverageIsScalar) { |
| builder.fFSCode.appendf("\tvec4 %s4 = vec4(%s);\n", |
| inCoverage.c_str(), inCoverage.c_str()); |
| inCoverage.append("4"); |
| } |
| builder.setCurrentStage(s); |
| fEffects[s] = builder.createAndEmitGLEffect( |
| *stages[s], |
| fDesc.fEffectKeys[s], |
| inCoverage.size() ? inCoverage.c_str() : NULL, |
| outCoverage.c_str(), |
| inCoords, |
| &fUniformHandles.fSamplerUnis[s]); |
| builder.setNonStage(); |
| inCoverage = outCoverage; |
| } |
| } |
| } |
| |
| if (Desc::kNone_DualSrcOutput != fDesc.fDualSrcOutput) { |
| builder.fFSOutputs.push_back().set(kVec4f_GrSLType, |
| GrGLShaderVar::kOut_TypeModifier, |
| dual_source_output_name()); |
| bool outputIsZero = coverageIsZero; |
| SkString coeff; |
| if (!outputIsZero && |
| Desc::kCoverage_DualSrcOutput != fDesc.fDualSrcOutput && !wroteFragColorZero) { |
| if (!inColor.size()) { |
| outputIsZero = true; |
| } else { |
| if (Desc::kCoverageISA_DualSrcOutput == fDesc.fDualSrcOutput) { |
| coeff.printf("(1 - %s.a)", inColor.c_str()); |
| } else { |
| coeff.printf("(vec4(1,1,1,1) - %s)", inColor.c_str()); |
| } |
| } |
| } |
| if (outputIsZero) { |
| builder.fFSCode.appendf("\t%s = %s;\n", |
| dual_source_output_name(), |
| GrGLSLZerosVecf(4)); |
| } else { |
| builder.fFSCode.appendf("\t%s =", dual_source_output_name()); |
| GrGLSLModulate4f(&builder.fFSCode, coeff.c_str(), inCoverage.c_str()); |
| builder.fFSCode.append(";\n"); |
| } |
| dualSourceOutputWritten = true; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // combine color and coverage as frag color |
| |
| if (!wroteFragColorZero) { |
| if (coverageIsZero) { |
| builder.fFSCode.appendf("\t%s = %s;\n", |
| colorOutput.getName().c_str(), |
| GrGLSLZerosVecf(4)); |
| } else { |
| builder.fFSCode.appendf("\t%s = ", colorOutput.getName().c_str()); |
| GrGLSLModulate4f(&builder.fFSCode, inColor.c_str(), inCoverage.c_str()); |
| builder.fFSCode.append(";\n"); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // insert GS |
| #if GR_DEBUG |
| this->genGeometryShader(&builder); |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // compile and setup attribs and unis |
| |
| if (!this->compileShaders(builder)) { |
| return false; |
| } |
| |
| if (!this->bindOutputsAttribsAndLinkProgram(builder, |
| isColorDeclared, |
| dualSourceOutputWritten)) { |
| return false; |
| } |
| |
| builder.finished(fProgramID); |
| this->initSamplerUniforms(); |
| fUniformHandles.fRTHeightUni = builder.getRTHeightUniform(); |
| |
| return true; |
| } |
| |
| bool GrGLProgram::bindOutputsAttribsAndLinkProgram(const GrGLShaderBuilder& builder, |
| bool bindColorOut, |
| bool bindDualSrcOut) { |
| GL_CALL_RET(fProgramID, CreateProgram()); |
| if (!fProgramID) { |
| return false; |
| } |
| |
| GL_CALL(AttachShader(fProgramID, fVShaderID)); |
| if (fGShaderID) { |
| GL_CALL(AttachShader(fProgramID, fGShaderID)); |
| } |
| GL_CALL(AttachShader(fProgramID, fFShaderID)); |
| |
| if (bindColorOut) { |
| GL_CALL(BindFragDataLocation(fProgramID, 0, declared_color_output_name())); |
| } |
| if (bindDualSrcOut) { |
| GL_CALL(BindFragDataLocationIndexed(fProgramID, 0, 1, dual_source_output_name())); |
| } |
| |
| // Bind the attrib locations to same values for all shaders |
| GL_CALL(BindAttribLocation(fProgramID, |
| kPositionAttributeIndex, |
| builder.positionAttribute().c_str())); |
| GL_CALL(BindAttribLocation(fProgramID, kTexCoordAttributeIndex, TEX_ATTR_NAME)); |
| GL_CALL(BindAttribLocation(fProgramID, kColorAttributeIndex, COL_ATTR_NAME)); |
| GL_CALL(BindAttribLocation(fProgramID, kCoverageAttributeIndex, COV_ATTR_NAME)); |
| GL_CALL(BindAttribLocation(fProgramID, kEdgeAttributeIndex, EDGE_ATTR_NAME)); |
| |
| GL_CALL(LinkProgram(fProgramID)); |
| |
| GrGLint linked = GR_GL_INIT_ZERO; |
| GL_CALL(GetProgramiv(fProgramID, GR_GL_LINK_STATUS, &linked)); |
| if (!linked) { |
| GrGLint infoLen = GR_GL_INIT_ZERO; |
| GL_CALL(GetProgramiv(fProgramID, GR_GL_INFO_LOG_LENGTH, &infoLen)); |
| SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger |
| if (infoLen > 0) { |
| // retrieve length even though we don't need it to workaround |
| // bug in chrome cmd buffer param validation. |
| GrGLsizei length = GR_GL_INIT_ZERO; |
| GL_CALL(GetProgramInfoLog(fProgramID, |
| infoLen+1, |
| &length, |
| (char*)log.get())); |
| GrPrintf((char*)log.get()); |
| } |
| GrAssert(!"Error linking program"); |
| GL_CALL(DeleteProgram(fProgramID)); |
| fProgramID = 0; |
| return false; |
| } |
| return true; |
| } |
| |
| void GrGLProgram::initSamplerUniforms() { |
| GL_CALL(UseProgram(fProgramID)); |
| // We simply bind the uniforms to successive texture units beginning at 0. setData() assumes this |
| // behavior. |
| GrGLint texUnitIdx = 0; |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| int numSamplers = fUniformHandles.fSamplerUnis[s].count(); |
| for (int u = 0; u < numSamplers; ++u) { |
| UniformHandle handle = fUniformHandles.fSamplerUnis[s][u]; |
| if (GrGLUniformManager::kInvalidUniformHandle != handle) { |
| fUniformManager.setSampler(handle, texUnitIdx); |
| ++texUnitIdx; |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLProgram::setData(GrGpuGL* gpu, |
| GrColor color, |
| GrColor coverage, |
| SharedGLState* sharedState) { |
| const GrDrawState& drawState = gpu->getDrawState(); |
| |
| this->setColor(drawState, color, sharedState); |
| this->setCoverage(drawState, coverage, sharedState); |
| this->setMatrixAndRenderTargetHeight(drawState); |
| |
| // Setup the SkXfermode::Mode-based colorfilter uniform if necessary |
| if (GrGLUniformManager::kInvalidUniformHandle != fUniformHandles.fColorFilterUni && |
| fColorFilterColor != drawState.getColorFilterColor()) { |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(drawState.getColorFilterColor(), c); |
| fUniformManager.set4fv(fUniformHandles.fColorFilterUni, 0, 1, c); |
| fColorFilterColor = drawState.getColorFilterColor(); |
| } |
| |
| GrGLint texUnitIdx = 0; |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| if (NULL != fEffects[s]) { |
| const GrEffectStage& stage = drawState.getStage(s); |
| GrAssert(NULL != stage.getEffect()); |
| fEffects[s]->setData(fUniformManager, stage); |
| int numSamplers = fUniformHandles.fSamplerUnis[s].count(); |
| for (int u = 0; u < numSamplers; ++u) { |
| UniformHandle handle = fUniformHandles.fSamplerUnis[s][u]; |
| if (GrGLUniformManager::kInvalidUniformHandle != handle) { |
| const GrTextureAccess& access = (*stage.getEffect())->textureAccess(u); |
| GrGLTexture* texture = static_cast<GrGLTexture*>(access.getTexture()); |
| gpu->bindTexture(texUnitIdx, access.getParams(), texture); |
| ++texUnitIdx; |
| } |
| } |
| } |
| } |
| } |
| |
| void GrGLProgram::setColor(const GrDrawState& drawState, |
| GrColor color, |
| SharedGLState* sharedState) { |
| if (!(drawState.getVertexLayout() & GrDrawState::kColor_VertexLayoutBit)) { |
| switch (fDesc.fColorInput) { |
| case GrGLProgram::Desc::kAttribute_ColorInput: |
| if (sharedState->fConstAttribColor != color) { |
| // OpenGL ES only supports the float varieties of glVertexAttrib |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(color, c); |
| GL_CALL(VertexAttrib4fv(kColorAttributeIndex, c)); |
| sharedState->fConstAttribColor = color; |
| } |
| break; |
| case GrGLProgram::Desc::kUniform_ColorInput: |
| if (fColor != color) { |
| // OpenGL ES doesn't support unsigned byte varieties of glUniform |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(color, c); |
| GrAssert(GrGLUniformManager::kInvalidUniformHandle != |
| fUniformHandles.fColorUni); |
| fUniformManager.set4fv(fUniformHandles.fColorUni, 0, 1, c); |
| fColor = color; |
| } |
| break; |
| case GrGLProgram::Desc::kSolidWhite_ColorInput: |
| case GrGLProgram::Desc::kTransBlack_ColorInput: |
| break; |
| default: |
| GrCrash("Unknown color type."); |
| } |
| } |
| } |
| |
| void GrGLProgram::setCoverage(const GrDrawState& drawState, |
| GrColor coverage, |
| SharedGLState* sharedState) { |
| if (!(drawState.getVertexLayout() & GrDrawState::kCoverage_VertexLayoutBit)) { |
| switch (fDesc.fCoverageInput) { |
| case Desc::kAttribute_ColorInput: |
| if (sharedState->fConstAttribCoverage != coverage) { |
| // OpenGL ES only supports the float varieties of glVertexAttrib |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(coverage, c); |
| GL_CALL(VertexAttrib4fv(kCoverageAttributeIndex, c)); |
| sharedState->fConstAttribCoverage = coverage; |
| } |
| break; |
| case Desc::kUniform_ColorInput: |
| if (fCoverage != coverage) { |
| // OpenGL ES doesn't support unsigned byte varieties of glUniform |
| GrGLfloat c[4]; |
| GrColorToRGBAFloat(coverage, c); |
| GrAssert(GrGLUniformManager::kInvalidUniformHandle != |
| fUniformHandles.fCoverageUni); |
| fUniformManager.set4fv(fUniformHandles.fCoverageUni, 0, 1, c); |
| fCoverage = coverage; |
| } |
| break; |
| case Desc::kSolidWhite_ColorInput: |
| case Desc::kTransBlack_ColorInput: |
| break; |
| default: |
| GrCrash("Unknown coverage type."); |
| } |
| } |
| } |
| |
| void GrGLProgram::setMatrixAndRenderTargetHeight(const GrDrawState& drawState) { |
| const GrRenderTarget* rt = drawState.getRenderTarget(); |
| SkISize size; |
| size.set(rt->width(), rt->height()); |
| |
| // Load the RT height uniform if it is needed to y-flip gl_FragCoord. |
| if (GrGLUniformManager::kInvalidUniformHandle != fUniformHandles.fRTHeightUni && |
| fMatrixState.fRenderTargetSize.fHeight != size.fHeight) { |
| fUniformManager.set1f(fUniformHandles.fRTHeightUni, SkIntToScalar(size.fHeight)); |
| } |
| |
| if (fMatrixState.fRenderTargetOrigin != rt->origin() || |
| !fMatrixState.fViewMatrix.cheapEqualTo(drawState.getViewMatrix()) || |
| fMatrixState.fRenderTargetSize != size) { |
| SkMatrix m; |
| if (kBottomLeft_GrSurfaceOrigin == rt->origin()) { |
| m.setAll( |
| SkIntToScalar(2) / size.fWidth, 0, -SK_Scalar1, |
| 0,-SkIntToScalar(2) / size.fHeight, SK_Scalar1, |
| 0, 0, SkMatrix::I()[8]); |
| } else { |
| m.setAll( |
| SkIntToScalar(2) / size.fWidth, 0, -SK_Scalar1, |
| 0, SkIntToScalar(2) / size.fHeight,-SK_Scalar1, |
| 0, 0, SkMatrix::I()[8]); |
| } |
| m.setConcat(m, drawState.getViewMatrix()); |
| |
| // ES doesn't allow you to pass true to the transpose param so we do our own transpose. |
| GrGLfloat mt[] = { |
| SkScalarToFloat(m[SkMatrix::kMScaleX]), |
| SkScalarToFloat(m[SkMatrix::kMSkewY]), |
| SkScalarToFloat(m[SkMatrix::kMPersp0]), |
| SkScalarToFloat(m[SkMatrix::kMSkewX]), |
| SkScalarToFloat(m[SkMatrix::kMScaleY]), |
| SkScalarToFloat(m[SkMatrix::kMPersp1]), |
| SkScalarToFloat(m[SkMatrix::kMTransX]), |
| SkScalarToFloat(m[SkMatrix::kMTransY]), |
| SkScalarToFloat(m[SkMatrix::kMPersp2]) |
| }; |
| fUniformManager.setMatrix3f(fUniformHandles.fViewMatrixUni, mt); |
| fMatrixState.fViewMatrix = drawState.getViewMatrix(); |
| fMatrixState.fRenderTargetSize = size; |
| fMatrixState.fRenderTargetOrigin = rt->origin(); |
| } |
| } |