Added an abstract invalidate method to rx::RenderTarget.

src/libGLESv2/renderer/RenderTarget.h

@@ -35,7 +35,9 @@ class RenderTarget
     GLenum getInternalFormat() { return mInternalFormat; }
     GLenum getActualFormat() { return mActualFormat; }
     GLsizei getSamples() { return mSamples; }
-    
+
+    virtual void invalidate(GLint x, GLint y, GLsizei width, GLsizei height) = 0;
+
     struct Desc {
         GLsizei width;
         GLsizei height;

src/libGLESv2/renderer/RenderTarget11.cpp

@@ -386,6 +386,11 @@ RenderTarget11 *RenderTarget11::makeRenderTarget11(RenderTarget *target)
     return static_cast<rx::RenderTarget11*>(target);
 }
 
+void RenderTarget11::invalidate(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+    // Currently a no-op
+}
+
 ID3D11Resource *RenderTarget11::getTexture() const
 {
     if (mTexture)

src/libGLESv2/renderer/RenderTarget11.h

@@ -27,6 +27,8 @@ class RenderTarget11 : public RenderTarget
 
     static RenderTarget11 *makeRenderTarget11(RenderTarget *renderTarget);
 
+    virtual void invalidate(GLint x, GLint y, GLsizei width, GLsizei height);
+
     // Adds reference, caller must call Release
     ID3D11Resource *getTexture() const;
 

src/libGLESv2/renderer/RenderTarget9.cpp

@@ -107,6 +107,11 @@ RenderTarget9 *RenderTarget9::makeRenderTarget9(RenderTarget *target)
     return static_cast<rx::RenderTarget9*>(target);
 }
 
+void RenderTarget9::invalidate(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+    // Currently a no-op
+}
+
 IDirect3DSurface9 *RenderTarget9::getSurface()
 {
     // Caller is responsible for releasing the returned surface reference.

src/libGLESv2/renderer/RenderTarget9.h

@@ -25,6 +25,9 @@ class RenderTarget9 : public RenderTarget
     virtual ~RenderTarget9();
 
     static RenderTarget9 *makeRenderTarget9(RenderTarget *renderTarget);
+
+    virtual void invalidate(GLint x, GLint y, GLsizei width, GLsizei height);
+
     IDirect3DSurface9 *getSurface();
 
   private: