Implement NVPR on GLES

src/gpu/gl/GrGLProgramEffects.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrGLProgramEffects.h"
 #include "GrDrawEffect.h"
 #include "gl/GrGLEffect.h"
+#include "gl/GrGLPathRendering.h"
+#include "gl/builders/GrGLProgramBuilder.h"
 #include "gl/GrGLVertexEffect.h"
 #include "gl/GrGpuGL.h"
 
 typedef GrGLProgramEffects::TransformedCoords TransformedCoords;
 typedef GrGLProgramEffects::TransformedCoordsArray TransformedCoordsArray;
 typedef GrGLProgramEffects::TextureSampler TextureSampler;
 typedef GrGLProgramEffects::TextureSamplerArray TextureSamplerArray;
 
 /**
  * We specialize the vertex code for each of these matrix types.
@@ skipping 265 matching lines @@
     fsBuilder->codeAppend("\t}\n");
 }
 
 void GrGLVertexProgramEffects::emitTransforms(GrGLFullProgramBuilder* builder,
                                               const GrDrawEffect& drawEffect,
                                               TransformedCoordsArray* outCoords) {
     SkTArray<Transform, true>& transforms = fTransforms.push_back();
     uint32_t totalKey = GenTransformKey(drawEffect);
     int numTransforms = drawEffect.effect()->numTransforms();
     transforms.push_back_n(numTransforms);
+
+    SkTArray<PathTransform, true>* pathTransforms = NULL;
+    const GrGLCaps* glCaps = builder->ctxInfo().caps();
+    if (glCaps->pathRenderingSupport() &&
+        builder->gpu()->glPathRendering()->texturingMode() ==
+           GrGLPathRendering::SeparableShaders_TexturingMode) {
+        pathTransforms = &fPathTransforms.push_back();
+        pathTransforms->push_back_n(numTransforms);
+    }
+
     for (int t = 0; t < numTransforms; t++) {
         GrSLType varyingType = kVoid_GrSLType;
         const char* uniName;
         switch (get_matrix_type(totalKey, t)) {
             case kNoPersp_MatrixType:
                 uniName = "StageMatrix";
                 varyingType = kVec2f_GrSLType;
                 break;
             case kGeneral_MatrixType:
                 uniName = "StageMatrix";
@@ skipping 16 matching lines @@
         const char* varyingName = "MatrixCoord";
         SkString suffixedVaryingName;
         if (0 != t) {
             suffixedVaryingName.append(varyingName);
             suffixedVaryingName.appendf("_%i", t);
             varyingName = suffixedVaryingName.c_str();
         }
         const char* vsVaryingName;
         const char* fsVaryingName;
         GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder();
-        builder->addVarying(varyingType, varyingName, &vsVaryingName, &fsVaryingName);
+        if (pathTransforms) {
+            (*pathTransforms)[t].fHandle =
+                builder->addSeparableVarying(varyingType, varyingName, &vsVaryingName, &fsVaryingName);
+            (*pathTransforms)[t].fType = varyingType;
+        } else {
+            builder->addVarying(varyingType, varyingName, &vsVaryingName, &fsVaryingName);
+        }
 
         const GrGLShaderVar& coords = kPosition_GrCoordSet == get_source_coords(totalKey, t) ?
                                           vsBuilder->positionAttribute() :
                                           vsBuilder->localCoordsAttribute();
         // varying = matrix * coords (logically)
         SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
         if (kVec2f_GrSLType == varyingType) {
             vsBuilder->codeAppendf("\t%s = (%s * vec3(%s, 1)).xy;\n",
                                    vsVaryingName, uniName, coords.c_str());
         } else {
             vsBuilder->codeAppendf("\t%s = %s * vec3(%s, 1);\n",
                                    vsVaryingName, uniName, coords.c_str());
         }
         SkNEW_APPEND_TO_TARRAY(outCoords, TransformedCoords,
                                (SkString(fsVaryingName), varyingType));
     }
 }
 
 void GrGLVertexProgramEffects::setData(GrGpuGL* gpu,
-                                       const GrGLProgramDataManager& programResourceManager,
+                                       GrGpu::DrawType drawType,
+                                       const GrGLProgramDataManager& programDataManager,
                                        const GrEffectStage* effectStages[]) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fTransforms.count());
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         GrDrawEffect drawEffect(*effectStages[e], fHasExplicitLocalCoords);
-        fGLEffects[e]->setData(programResourceManager, drawEffect);
-        this->setTransformData(programResourceManager, drawEffect, e);
+        fGLEffects[e]->setData(programDataManager, drawEffect);
+        if (GrGpu::IsPathRenderingDrawType(drawType)) {
+            this->setPathTransformData(gpu, programDataManager, drawEffect, e);
+        } else {
+            this->setTransformData(gpu, programDataManager, drawEffect, e);
+        }
+
         this->bindTextures(gpu, drawEffect.effect(), e);
     }
 }
 
-void GrGLVertexProgramEffects::setTransformData(const GrGLProgramDataManager& programResourceManager,
+void GrGLVertexProgramEffects::setTransformData(GrGpuGL* gpu,
+                                                const GrGLProgramDataManager& pdman,
                                                 const GrDrawEffect& drawEffect,
                                                 int effectIdx) {
     SkTArray<Transform, true>& transforms = fTransforms[effectIdx];
     int numTransforms = transforms.count();
     SkASSERT(numTransforms == drawEffect.effect()->numTransforms());
     for (int t = 0; t < numTransforms; ++t) {
         SkASSERT(transforms[t].fHandle.isValid());
         const SkMatrix& matrix = get_transform_matrix(drawEffect, t);
         if (!transforms[t].fCurrentValue.cheapEqualTo(matrix)) {
-            programResourceManager.setSkMatrix(transforms[t].fHandle, matrix);
+            pdman.setSkMatrix(transforms[t].fHandle, matrix);
             transforms[t].fCurrentValue = matrix;
         }
     }
 }
 
+void GrGLVertexProgramEffects::setPathTransformData(GrGpuGL* gpu,
+                                                    const GrGLProgramDataManager& pdman,
+                                                    const GrDrawEffect& drawEffect,
+                                                    int effectIdx) {
+    SkTArray<PathTransform, true>& transforms = fPathTransforms[effectIdx];
+    int numTransforms = transforms.count();
+    SkASSERT(numTransforms == drawEffect.effect()->numTransforms());
+    for (int t = 0; t < numTransforms; ++t) {
+        SkASSERT(transforms[t].fHandle.isValid());
+        const SkMatrix& transform = get_transform_matrix(drawEffect, t);
+        if (transforms[t].fCurrentValue.cheapEqualTo(transform)) {
+            continue;
+        }
+        transforms[t].fCurrentValue = transform;
+        switch (transforms[t].fType) {
+            case kVec2f_GrSLType:
+                pdman.setProgramPathFragmentInputTransform(transforms[t].fHandle, 2, transform);
+                break;
+            case kVec3f_GrSLType:
+                pdman.setProgramPathFragmentInputTransform(transforms[t].fHandle, 3, transform);
+                break;
+            default:
+                SkFAIL("Unexpected matrix type.");
+        }
+    }
+}
+
 GrGLVertexProgramEffectsBuilder::GrGLVertexProgramEffectsBuilder(GrGLFullProgramBuilder* builder,
                                                                  int reserveCount)
     : fBuilder(builder)
     , fProgramEffects(SkNEW_ARGS(GrGLVertexProgramEffects,
                                  (reserveCount,
                                   fBuilder->getVertexShaderBuilder()->hasExplicitLocalCoords()))) {
 }
 void GrGLVertexProgramEffectsBuilder::emitEffect(const GrEffectStage& stage,
                                                  const GrEffectKey& key,
                                                  const char* outColor,
@@ skipping 46 matching lines @@
     for (int t = 0; t < numTransforms; ++t) {
         GrSLType type = kGeneral_MatrixType == get_matrix_type(totalKey, t) ?
                             kVec3f_GrSLType :
                             kVec2f_GrSLType;
         name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex++);
         SkNEW_APPEND_TO_TARRAY(outCoords, TransformedCoords, (name, type));
     }
 }
 
 void GrGLPathTexGenProgramEffects::setData(GrGpuGL* gpu,
-                                       const GrGLProgramDataManager& programResourceManager,
-                                       const GrEffectStage* effectStages[]) {
+                                           GrGpu::DrawType,
+                                           const GrGLProgramDataManager& pdman,
+                                           const GrEffectStage* effectStages[]) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fTransforms.count());
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         GrDrawEffect drawEffect(*effectStages[e], false);
-        fGLEffects[e]->setData(programResourceManager, drawEffect);
+        fGLEffects[e]->setData(pdman, drawEffect);
         this->setPathTexGenState(gpu, drawEffect, e);
         this->bindTextures(gpu, drawEffect.effect(), e);
     }
 }
 
 void GrGLPathTexGenProgramEffects::setPathTexGenState(GrGpuGL* gpu,
                                               const GrDrawEffect& drawEffect,
                                               int effectIdx) {
     uint32_t totalKey = fTransforms[effectIdx].fTransformKey;
     int texCoordIndex = fTransforms[effectIdx].fTexCoordIndex;
@@ skipping 30 matching lines @@
 }
 void GrGLPathTexGenProgramEffectsBuilder::emitEffect(const GrEffectStage& stage,
                                                      const GrEffectKey& key,
                                                      const char* outColor,
                                                      const char* inColor,
                                                      int stageIndex) {
     SkASSERT(NULL != fProgramEffects.get());
     fProgramEffects->emitEffect(fBuilder, stage, key, outColor, inColor, stageIndex);
 }