diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/gl/GrGLProgram.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/gl/GrGLProgram.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,345 @@
+/*
+ * 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 "GrCoordTransform.h"
+#include "GrDrawEffect.h"
+#include "GrGLEffect.h"
+#include "GrGpuGL.h"
+#include "GrGLShaderVar.h"
+#include "GrGLSL.h"
+#include "SkXfermode.h"
+
+#define GL_CALL(X) GR_GL_CALL(fGpu->glInterface(), X)
+#define GL_CALL_RET(R, X) GR_GL_CALL_RET(fGpu->glInterface(), R, X)
+
+GrGLProgram* GrGLProgram::Create(GrGpuGL* gpu,
+                                 const GrGLProgramDesc& desc,
+                                 const GrEffectStage* colorStages[],
+                                 const GrEffectStage* coverageStages[]) {
+    GrGLProgram* program = SkNEW_ARGS(GrGLProgram, (gpu, desc, colorStages, coverageStages));
+    if (!program->succeeded()) {
+        delete program;
+        program = NULL;
+    }
+    return program;
+}
+
+GrGLProgram::GrGLProgram(GrGpuGL* gpu,
+                         const GrGLProgramDesc& desc,
+                         const GrEffectStage* colorStages[],
+                         const GrEffectStage* coverageStages[])
+: fGpu(gpu)
+, fUniformManager(gpu)
+, fHasVertexShader(false)
+, fNumTexCoordSets(0) {
+    fDesc = desc;
+    fProgramID = 0;
+
+    fDstCopyTexUnit = -1;
+
+    fColor = GrColor_ILLEGAL;
+
+    if (fDesc.getHeader().fHasVertexCode ||
+        !fGpu->shouldUseFixedFunctionTexturing()) {
+        GrGLFullShaderBuilder fullBuilder(fGpu, fUniformManager, fDesc);
+        if (this->genProgram(&fullBuilder, colorStages, coverageStages)) {
+            fUniformHandles.fViewMatrixUni = fullBuilder.getViewMatrixUniform();
+            fHasVertexShader = true;
+        }
+    } else {
+        GrGLFragmentOnlyShaderBuilder fragmentOnlyBuilder(fGpu, fUniformManager, fDesc);
+        if (this->genProgram(&fragmentOnlyBuilder, colorStages, coverageStages)) {
+            fNumTexCoordSets = fragmentOnlyBuilder.getNumTexCoordSets();
+        }
+    }
+}
+
+GrGLProgram::~GrGLProgram() {
+    if (fProgramID) {
+        GL_CALL(DeleteProgram(fProgramID));
+    }
+}
+
+void GrGLProgram::abandon() {
+    fProgramID = 0;
+}
+
+void GrGLProgram::overrideBlend(GrBlendCoeff* srcCoeff,
+                                GrBlendCoeff* dstCoeff) const {
+    switch (fDesc.getHeader().fCoverageOutput) {
+        case GrGLProgramDesc::kModulate_CoverageOutput:
+            break;
+        // The prog will write a coverage value to the secondary
+        // output and the dst is blended by one minus that value.
+        case GrGLProgramDesc::kSecondaryCoverage_CoverageOutput:
+        case GrGLProgramDesc::kSecondaryCoverageISA_CoverageOutput:
+        case GrGLProgramDesc::kSecondaryCoverageISC_CoverageOutput:
+            *dstCoeff = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff;
+            break;
+        case GrGLProgramDesc::kCombineWithDst_CoverageOutput:
+            // We should only have set this if the blend was specified as (1, 0)
+            SkASSERT(kOne_GrBlendCoeff == *srcCoeff && kZero_GrBlendCoeff == *dstCoeff);
+            break;
+        default:
+            GrCrash("Unexpected coverage output");
+            break;
+    }
+}
+
+bool GrGLProgram::genProgram(GrGLShaderBuilder* builder,
+                             const GrEffectStage* colorStages[],
+                             const GrEffectStage* coverageStages[]) {
+    SkASSERT(0 == fProgramID);
+
+    const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
+
+    // incoming color to current stage being processed.
+    GrGLSLExpr4 inColor = builder->getInputColor();
+
+    fColorEffects.reset(
+        builder->createAndEmitEffects(colorStages,
+                                      fDesc.effectKeys(),
+                                      fDesc.numColorEffects(),
+                                      &inColor));
+
+    ///////////////////////////////////////////////////////////////////////////
+    // compute the partial coverage
+    GrGLSLExpr4 inCoverage = builder->getInputCoverage();
+
+    fCoverageEffects.reset(
+        builder->createAndEmitEffects(coverageStages,
+                                      fDesc.getEffectKeys() + fDesc.numColorEffects(),
+                                      fDesc.numCoverageEffects(),
+                                      &inCoverage));
+
+    if (GrGLProgramDesc::CoverageOutputUsesSecondaryOutput(header.fCoverageOutput)) {
+        const char* secondaryOutputName = builder->enableSecondaryOutput();
+
+        // default coeff to ones for kCoverage_DualSrcOutput
+        GrGLSLExpr4 coeff(1);
+        if (GrGLProgramDesc::kSecondaryCoverageISA_CoverageOutput == header.fCoverageOutput) {
+            // Get (1-A) into coeff
+            coeff = GrGLSLExpr4::VectorCast(GrGLSLExpr1(1) - inColor.a());
+        } else if (GrGLProgramDesc::kSecondaryCoverageISC_CoverageOutput == header.fCoverageOutput) {
+            // Get (1-RGBA) into coeff
+            coeff = GrGLSLExpr4(1) - inColor;
+        }
+        // Get coeff * coverage into modulate and then write that to the dual source output.
+        builder->fsCodeAppendf("\t%s = %s;\n", secondaryOutputName, (coeff * inCoverage).c_str());
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // combine color and coverage as frag color
+
+    // Get "color * coverage" into fragColor
+    GrGLSLExpr4 fragColor = inColor * inCoverage;
+    // Now tack on "+(1-coverage)dst onto the frag color if we were asked to do so.
+    if (GrGLProgramDesc::kCombineWithDst_CoverageOutput == header.fCoverageOutput) {
+        GrGLSLExpr4 dstCoeff = GrGLSLExpr4(1) - inCoverage;
+
+        GrGLSLExpr4 dstContribution = dstCoeff * GrGLSLExpr4(builder->dstColor());
+
+        fragColor = fragColor + dstContribution;
+    }
+    builder->fsCodeAppendf("\t%s = %s;\n", builder->getColorOutputName(), fragColor.c_str());
+
+    if (!builder->finish(&fProgramID)) {
+        return false;
+    }
+
+    fUniformHandles.fRTHeightUni = builder->getRTHeightUniform();
+    fUniformHandles.fDstCopyTopLeftUni = builder->getDstCopyTopLeftUniform();
+    fUniformHandles.fDstCopyScaleUni = builder->getDstCopyScaleUniform();
+    fUniformHandles.fColorUni = builder->getColorUniform();
+    fUniformHandles.fCoverageUni = builder->getCoverageUniform();
+    fUniformHandles.fDstCopySamplerUni = builder->getDstCopySamplerUniform();
+    // This must be called after we set fDstCopySamplerUni above.
+    this->initSamplerUniforms();
+
+    return true;
+}
+
+void GrGLProgram::initSamplerUniforms() {
+    GL_CALL(UseProgram(fProgramID));
+    GrGLint texUnitIdx = 0;
+    if (fUniformHandles.fDstCopySamplerUni.isValid()) {
+        fUniformManager.setSampler(fUniformHandles.fDstCopySamplerUni, texUnitIdx);
+        fDstCopyTexUnit = texUnitIdx++;
+    }
+    fColorEffects->initSamplers(fUniformManager, &texUnitIdx);
+    fCoverageEffects->initSamplers(fUniformManager, &texUnitIdx);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void GrGLProgram::setData(GrDrawState::BlendOptFlags blendOpts,
+                          const GrEffectStage* colorStages[],
+                          const GrEffectStage* coverageStages[],
+                          const GrDeviceCoordTexture* dstCopy,
+                          SharedGLState* sharedState) {
+    const GrDrawState& drawState = fGpu->getDrawState();
+
+    GrColor color;
+    GrColor coverage;
+    if (blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag) {
+        color = 0;
+        coverage = 0;
+    } else if (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) {
+        color = 0xffffffff;
+        coverage = drawState.getCoverageColor();
+    } else {
+        color = drawState.getColor();
+        coverage = drawState.getCoverageColor();
+    }
+
+    this->setColor(drawState, color, sharedState);
+    this->setCoverage(drawState, coverage, sharedState);
+    this->setMatrixAndRenderTargetHeight(drawState);
+
+    if (NULL != dstCopy) {
+        if (fUniformHandles.fDstCopyTopLeftUni.isValid()) {
+            fUniformManager.set2f(fUniformHandles.fDstCopyTopLeftUni,
+                                  static_cast<GrGLfloat>(dstCopy->offset().fX),
+                                  static_cast<GrGLfloat>(dstCopy->offset().fY));
+            fUniformManager.set2f(fUniformHandles.fDstCopyScaleUni,
+                                  1.f / dstCopy->texture()->width(),
+                                  1.f / dstCopy->texture()->height());
+            GrGLTexture* texture = static_cast<GrGLTexture*>(dstCopy->texture());
+            static GrTextureParams kParams; // the default is clamp, nearest filtering.
+            fGpu->bindTexture(fDstCopyTexUnit, kParams, texture);
+        } else {
+            SkASSERT(!fUniformHandles.fDstCopyScaleUni.isValid());
+            SkASSERT(!fUniformHandles.fDstCopySamplerUni.isValid());
+        }
+    } else {
+        SkASSERT(!fUniformHandles.fDstCopyTopLeftUni.isValid());
+        SkASSERT(!fUniformHandles.fDstCopyScaleUni.isValid());
+        SkASSERT(!fUniformHandles.fDstCopySamplerUni.isValid());
+    }
+
+    fColorEffects->setData(fGpu, fUniformManager, colorStages);
+    fCoverageEffects->setData(fGpu, fUniformManager, coverageStages);
+
+
+    // TexGen state applies to the the fixed function vertex shader. For custom shaders, it's
+    // ignored, so we don't need to change the texgen settings in that case.
+    if (!fHasVertexShader) {
+        fGpu->flushTexGenSettings(fNumTexCoordSets);
+    }
+}
+
+void GrGLProgram::setColor(const GrDrawState& drawState,
+                           GrColor color,
+                           SharedGLState* sharedState) {
+    const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
+    if (!drawState.hasColorVertexAttribute()) {
+        switch (header.fColorInput) {
+            case GrGLProgramDesc::kAttribute_ColorInput:
+                SkASSERT(-1 != header.fColorAttributeIndex);
+                if (sharedState->fConstAttribColor != color ||
+                    sharedState->fConstAttribColorIndex != header.fColorAttributeIndex) {
+                    // OpenGL ES only supports the float varieties of glVertexAttrib
+                    GrGLfloat c[4];
+                    GrColorToRGBAFloat(color, c);
+                    GL_CALL(VertexAttrib4fv(header.fColorAttributeIndex, c));
+                    sharedState->fConstAttribColor = color;
+                    sharedState->fConstAttribColorIndex = header.fColorAttributeIndex;
+                }
+                break;
+            case GrGLProgramDesc::kUniform_ColorInput:
+                if (fColor != color && fUniformHandles.fColorUni.isValid()) {
+                    // OpenGL ES doesn't support unsigned byte varieties of glUniform
+                    GrGLfloat c[4];
+                    GrColorToRGBAFloat(color, c);
+                    fUniformManager.set4fv(fUniformHandles.fColorUni, 1, c);
+                    fColor = color;
+                }
+                sharedState->fConstAttribColorIndex = -1;
+                break;
+            case GrGLProgramDesc::kSolidWhite_ColorInput:
+            case GrGLProgramDesc::kTransBlack_ColorInput:
+                sharedState->fConstAttribColorIndex = -1;
+                break;
+            default:
+                GrCrash("Unknown color type.");
+        }
+    } else {
+        sharedState->fConstAttribColorIndex = -1;
+    }
+}
+
+void GrGLProgram::setCoverage(const GrDrawState& drawState,
+                              GrColor coverage,
+                              SharedGLState* sharedState) {
+    const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
+    if (!drawState.hasCoverageVertexAttribute()) {
+        switch (header.fCoverageInput) {
+            case GrGLProgramDesc::kAttribute_ColorInput:
+                if (sharedState->fConstAttribCoverage != coverage ||
+                    sharedState->fConstAttribCoverageIndex != header.fCoverageAttributeIndex) {
+                    // OpenGL ES only supports the float varieties of  glVertexAttrib
+                    GrGLfloat c[4];
+                    GrColorToRGBAFloat(coverage, c);
+                    GL_CALL(VertexAttrib4fv(header.fCoverageAttributeIndex, c));
+                    sharedState->fConstAttribCoverage = coverage;
+                    sharedState->fConstAttribCoverageIndex = header.fCoverageAttributeIndex;
+                }
+                break;
+            case GrGLProgramDesc::kUniform_ColorInput:
+                if (fCoverage != coverage) {
+                    // OpenGL ES doesn't support unsigned byte varieties of glUniform
+                    GrGLfloat c[4];
+                    GrColorToRGBAFloat(coverage, c);
+                    fUniformManager.set4fv(fUniformHandles.fCoverageUni, 1, c);
+                    fCoverage = coverage;
+                }
+                sharedState->fConstAttribCoverageIndex = -1;
+                break;
+            case GrGLProgramDesc::kSolidWhite_ColorInput:
+            case GrGLProgramDesc::kTransBlack_ColorInput:
+                sharedState->fConstAttribCoverageIndex = -1;
+                break;
+            default:
+                GrCrash("Unknown coverage type.");
+        }
+    } else {
+        sharedState->fConstAttribCoverageIndex = -1;
+    }
+}
+
+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 (fUniformHandles.fRTHeightUni.isValid() &&
+        fMatrixState.fRenderTargetSize.fHeight != size.fHeight) {
+        fUniformManager.set1f(fUniformHandles.fRTHeightUni, SkIntToScalar(size.fHeight));
+    }
+
+    if (!fHasVertexShader) {
+        SkASSERT(!fUniformHandles.fViewMatrixUni.isValid());
+        fGpu->setProjectionMatrix(drawState.getViewMatrix(), size, rt->origin());
+    } else if (fMatrixState.fRenderTargetOrigin != rt->origin() ||
+               fMatrixState.fRenderTargetSize != size ||
+               !fMatrixState.fViewMatrix.cheapEqualTo(drawState.getViewMatrix())) {
+        SkASSERT(fUniformHandles.fViewMatrixUni.isValid());
+
+        fMatrixState.fViewMatrix = drawState.getViewMatrix();
+        fMatrixState.fRenderTargetSize = size;
+        fMatrixState.fRenderTargetOrigin = rt->origin();
+
+        GrGLfloat viewMatrix[3 * 3];
+        fMatrixState.getGLMatrix<3>(viewMatrix);
+        fUniformManager.setMatrix3f(fUniformHandles.fViewMatrixUni, viewMatrix);
+    }
+}