Implement path cover with nv_path_rendering

src/gpu/gl/GrGpuGL_program.cpp

Index: src/gpu/gl/GrGpuGL_program.cpp
diff --git a/src/gpu/gl/GrGpuGL_program.cpp b/src/gpu/gl/GrGpuGL_program.cpp
index 26ad9b8f159fa59be32960ea068e5bc2157e5997..18fe9d8d6926adf122714cd4ed85b27953b42325 100644
--- a/src/gpu/gl/GrGpuGL_program.cpp
+++ b/src/gpu/gl/GrGpuGL_program.cpp
@@ -208,12 +208,14 @@ bool GrGpuGL::flushGraphicsState(DrawType type, const GrDeviceCoordTexture* dstC
     // GrGpu::setupClipAndFlushState should have already checked this and bailed if not true.
     SkASSERT(NULL != drawState.getRenderTarget());
 
-    if (kStencilPath_DrawType == type) {
+    if (kStencilPath_DrawType == type || kDrawPath_DrawType == type) {
         const GrRenderTarget* rt = this->getDrawState().getRenderTarget();
         SkISize size;
         size.set(rt->width(), rt->height());
         this->setProjectionMatrix(drawState.getViewMatrix(), size, rt->origin());
-    } else {
+    }
+
+    if (kStencilPath_DrawType != type) {

[Chris Dalton, 2013/09/13 19:49:58]

Kimmo, we should be able to leave this function as-is, except perhaps for an
assert:

  SkASSERT(kDrawPath_DrawType != type || !fCurrentProgram->hasVertexShader());

When there isn't a vertex shader, fCurrentProgram->setData updates the
projection matrix already.

[Kimmo Kinnunen, 2013/09/18 07:52:38]

But sometimes gpu draw path is selected when the program has vertex shader. We
will still stencil the path with gpu path stencil func. This needs the proper
projection matrix.

[Chris Dalton, 2013/09/23 02:05:59]

When does it use kDrawPath_DrawType with a vertex shader? The intention is to
never do that, so if there are any cases where that happens we need to fix it.

[bsalomon, 2013/10/08 14:05:08]

agreed.

         this->flushMiscFixedFunctionState();
 
         GrBlendCoeff srcCoeff;