Adding support for per vertex opacity on textured layer

cc/shader.h

Index: cc/shader.h
diff --git a/cc/shader.h b/cc/shader.h
index a1aec88d69298193d883e15bc8ea05d9c8daa2c3..0d929f90f19af9a1fa20f191abee6468a66f8880 100644
--- a/cc/shader.h
+++ b/cc/shader.h
@@ -70,10 +70,12 @@ public:
 
     int matrixLocation() const { return m_matrixLocation; }
     int texTransformLocation() const { return m_texTransformLocation; }
+    int vertexOpacityLocation() const { return m_vertexOpacityLocation; }
 
 private:
     int m_matrixLocation;
     int m_texTransformLocation;
+    int m_vertexOpacityLocation;
 };
 
 class VertexShaderQuad {
@@ -154,7 +156,12 @@ private:
     int m_samplerLocation;
 };
 
-class FragmentShaderRGBATexFlipAlpha : public FragmentTexAlphaBinding {
+class FragmentShaderRGBATexFlipVaryingAlpha : public FragmentTexOpaqueBinding {
+public:
+    std::string getShaderString() const;
+};
+
+class FragmentShaderRGBATexVaryingAlpha : public FragmentTexOpaqueBinding {
 public:
     std::string getShaderString() const;
 };
@@ -164,12 +171,12 @@ public:
     std::string getShaderString() const;
 };
 
-class FragmentShaderRGBATexRectFlipAlpha : public FragmentTexAlphaBinding {
+class FragmentShaderRGBATexRectFlipVaryingAlpha : public FragmentTexAlphaBinding {
 public:
     std::string getShaderString() const;
 };
 
-class FragmentShaderRGBATexRectAlpha : public FragmentTexAlphaBinding {
+class FragmentShaderRGBATexRectVaryingAlpha : public FragmentTexAlphaBinding {
 public:
     std::string getShaderString() const;
 };