Added an abstract Renderer::clear method.

TRAC #22041

Unimplemented in Renderer11 and Renderer9 only forces the depth stencil state
to reset.

Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch

Author:    Geoff Lang

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1423 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer9.cpp b/src/libGLESv2/renderer/Renderer9.cpp
index d183750..d45cd8f 100644
--- a/src/libGLESv2/renderer/Renderer9.cpp
+++ b/src/libGLESv2/renderer/Renderer9.cpp
@@ -865,6 +865,14 @@
     // TODO
 }
 
+void Renderer9::clear(GLbitfield mask, const gl::Color &colorClear, float depthClear, int stencilClear,
+                      gl::Framebuffer *frameBuffer)
+{
+    mForceSetDepthStencilState = true;
+
+    // TODO
+}
+
 void Renderer9::releaseDeviceResources()
 {
     while (!mEventQueryPool.empty())