Add support for vertex and geometry shader textures

src/gpu/glsl/GrGLSLProgramBuilder.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLSLProgramBuilder_DEFINED
 #define GrGLSLProgramBuilder_DEFINED
 
@@ skipping 75 matching lines @@
 
     BuiltinUniformHandles fUniformHandles;
 
     GrGLSLPrimitiveProcessor* fGeometryProcessor;
     GrGLSLXferProcessor* fXferProcessor;
     GrGLSLFragProcs fFragmentProcessors;
 
 protected:
     explicit GrGLSLProgramBuilder(const DrawArgs& args);
 
-    bool emitAndInstallProcs(GrGLSLExpr4* inputColor, GrGLSLExpr4* inputCoverage, int maxTextures);
+    void addFeature(GrShaderFlags shaders, uint32_t featureBit, const char* extensionName);
+
+    bool emitAndInstallProcs(GrGLSLExpr4* inputColor, GrGLSLExpr4* inputCoverage);
 
     void cleanupFragmentProcessors();
 
     void finalizeShaders();
 
+    SkTArray<UniformHandle> fSamplerUniforms;
+
 private:
     // reset is called by program creator between each processor's emit code.  It increments the
     // stage offset for variable name mangling, and also ensures verfication variables in the
     // fragment shader are cleared.
     void reset() {
         this->addStage();
         SkDEBUGCODE(fFS.resetVerification();)
     }
     void addStage() { fStageIndex++; }
 
@@ skipping 20 matching lines @@
     void emitAndInstallFragProcs(int procOffset, int numProcs, GrGLSLExpr4* inOut);
     void emitAndInstallFragProc(const GrFragmentProcessor&,
                                 int index,
                                 const GrGLSLExpr4& input,
                                 GrGLSLExpr4* output);
     void emitAndInstallXferProc(const GrXferProcessor&,
                                 const GrGLSLExpr4& colorIn,
                                 const GrGLSLExpr4& coverageIn,
                                 bool ignoresCoverage,
                                 GrPixelLocalStorageState plsState);
+    void emitSamplers(const GrProcessor& processor,
+                      GrGLSLTextureSampler::TextureSamplerArray* outSamplers);
     void emitFSOutputSwizzle(bool hasSecondaryOutput);
+    bool checkSamplerCounts();
 
 #ifdef SK_DEBUG
     void verify(const GrPrimitiveProcessor&);
     void verify(const GrXferProcessor&);
     void verify(const GrFragmentProcessor&);
 #endif
 
-    virtual void emitSamplers(const GrProcessor& processor,
-                              GrGLSLTextureSampler::TextureSamplerArray* outSamplers) = 0;
-
-    GrGLSLPrimitiveProcessor::TransformsIn  fCoordTransforms;
-    GrGLSLPrimitiveProcessor::TransformsOut fOutCoords;
+    GrGLSLPrimitiveProcessor::TransformsIn     fCoordTransforms;
+    GrGLSLPrimitiveProcessor::TransformsOut    fOutCoords;
+    int                                        fNumVertexSamplers;
+    int                                        fNumGeometrySamplers;
+    int                                        fNumFragmentSamplers;
 };
 
 #endif