Add support for transformedLocalCoords to GrDefaultGeoProc

src/gpu/gl/GrGLGeometryProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGeometryProcessor_DEFINED
 #define GrGLGeometryProcessor_DEFINED
 
@@ skipping 23 matching lines @@
     template <class GeometryProcessor>
     void setTransformDataHelper(const GrPrimitiveProcessor& primProc,
                                 const GrGLProgramDataManager& pdman,
                                 int index,
                                 const SkTArray<const GrCoordTransform*, true>& transforms) {
         const GeometryProcessor& gp = primProc.cast<GeometryProcessor>();
         this->setTransformDataMatrix(gp.localMatrix(), pdman, index, transforms);
     }
 
 protected:
-    // A helper for subclasses which don't have an explicit local matrix
+    // Emit a uniform matrix for each coord transform.
     void emitTransforms(GrGLGPBuilder* gp,
                         const GrShaderVar& posVar,
                         const char* localCoords,
                         const TransformsIn& tin,
                         TransformsOut* tout) {
         this->emitTransforms(gp, posVar, localCoords, SkMatrix::I(), tin, tout);
     }
 
+    // Emit pre-transformed coords as a vertex attribute per coord-transform.
     void emitTransforms(GrGLGPBuilder*,
                         const GrShaderVar& posVar,
                         const char* localCoords,
                         const SkMatrix& localMatrix,
                         const TransformsIn&,
                         TransformsOut*);
 
+    // caller has emitted transforms via attributes
+    void emitTransforms(GrGLGPBuilder*,
+                        const char* localCoords,
+                        const TransformsIn& tin,
+                        TransformsOut* tout);
+
     struct GrGPArgs {
         // The variable used by a GP to store its position. It can be
         // either a vec2 or a vec3 depending on the presence of perspective.
         GrShaderVar fPositionVar;
     };
 
     // Create the correct type of position variable given the CTM
     void setupPosition(GrGLGPBuilder*, GrGPArgs*, const char* posName);
     void setupPosition(GrGLGPBuilder*, GrGPArgs*, const char* posName, const SkMatrix& mat,
                        UniformHandle* viewMatrixUniform);
@@ skipping 24 matching lines @@
             }
         }
     }
 
     virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0;
 
     typedef GrGLPrimitiveProcessor INHERITED;
 };
 
 #endif