Beginning of support for texture rectangles.

src/gpu/gl/GrGLGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 506 matching lines @@
     TriState                    fHWSRGBFramebuffer;
     SkTArray<uint32_t, true>    fHWBoundTextureUniqueIDs;
     ///@}
 
     /** IDs for copy surface program. */
     struct {
         GrGLuint    fProgram;
         GrGLint     fTextureUniform;
         GrGLint     fTexCoordXformUniform;
         GrGLint     fPosXformUniform;
-    }                           fCopyPrograms[2];
+    }                           fCopyPrograms[3];
     GrGLuint                    fCopyProgramArrayBuffer;
 
     struct {
         GrGLuint fProgram;
         GrGLint  fColorUniform;
         GrGLint  fRectUniform;
     }                           fWireRectProgram;
     GrGLuint                    fWireRectArrayBuffer;
 
     static int TextureTargetToCopyProgramIdx(GrGLenum target) {
-        if (target == GR_GL_TEXTURE_2D) {
-            return 0;
-        } else {
-            SkASSERT(target == GR_GL_TEXTURE_EXTERNAL);
-            return 1;
+        switch (target) {
+            case GR_GL_TEXTURE_2D:
+                return 0;
+            case GR_GL_TEXTURE_EXTERNAL:
+                return 1;
+            case GR_GL_TEXTURE_RECTANGLE:
+                return 2;
+            default:
+                SkFAIL("Unexpected texture target type.");
+                return 0;
         }
     }
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif