Add getGLMatrix method to MatrixState

src/gpu/gl/GrGLProgram.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 GrGLProgram_DEFINED
 #define GrGLProgram_DEFINED
@@ skipping 82 matching lines @@
         SkISize         fRenderTargetSize;
         GrSurfaceOrigin fRenderTargetOrigin;
 
         MatrixState() { this->invalidate(); }
         void invalidate() {
             fViewMatrix = SkMatrix::InvalidMatrix();
             fRenderTargetSize.fWidth = -1;
             fRenderTargetSize.fHeight = -1;
             fRenderTargetOrigin = (GrSurfaceOrigin) -1;
         }
+        template<int Size> void getGLMatrix(GrGLfloat* destMatrix) {
+            SkMatrix combined;
+            if (kBottomLeft_GrSurfaceOrigin == fRenderTargetOrigin) {
+                combined.setAll(SkIntToScalar(2) / fRenderTargetSize.fWidth, 0, -SK_Scalar1,
+                                0, -SkIntToScalar(2) / fRenderTargetSize.fHeight, SK_Scalar1,
+                                0, 0, SkMatrix::I()[8]);
+            } else {
+                combined.setAll(SkIntToScalar(2) / fRenderTargetSize.fWidth, 0, -SK_Scalar1,
+                                0, SkIntToScalar(2) / fRenderTargetSize.fHeight, -SK_Scalar1,
+                                0, 0, SkMatrix::I()[8]);
+            }
+            combined.setConcat(combined, fViewMatrix);
+            GrGLGetMatrix<Size>(destMatrix, combined);
+        }
     };
 
     /**
      * This function uploads uniforms and calls each GrGLEffect's setData. It is called before a
      * draw occurs using the program after the program has already been bound. It also uses the
      * GrGpuGL object to bind the textures required by the GrGLEffects. The color and coverage
      * stages come from GrGLProgramDesc::Build().
      */
     void setData(GrDrawState::BlendOptFlags,
                  const GrEffectStage* colorStages[],
@@ skipping 97 matching lines @@
     GrGLProgramDesc             fDesc;
     GrGpuGL*                    fGpu;
 
     GrGLUniformManager          fUniformManager;
     UniformHandles              fUniformHandles;
 
     typedef GrRefCnt INHERITED;
 };
 
 #endif