Implement path cover with nv_path_rendering

src/gpu/GrDrawTarget.h

Index: src/gpu/GrDrawTarget.h
diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrDrawTarget.h
index 5b1954609cf2fdcce13c41e05fd1493ddaf3e7e1..18df018401708f1997838bdbbf9e47371e5d9763 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrDrawTarget.h
@@ -328,6 +328,13 @@ public:
     void stencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill);
 
     /**

[Mark Kilgard, 2013/09/13 15:42:24]

Kimmo, I notice other method explanation comments wrap to a narrower line width
which may be the Skia code style convention.

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

About a year ago the convention changed from 80 lines to 100. However, if you're
in a file that still wraps at 80, they want you to either wrap your new lines at
80, or promote all the surrounding code to 100.

Here's the style guide:

https://sites.google.com/site/skiadocs/developer-documentation/contributing-c...

[bsalomon, 2013/09/13 20:25:28]

In practice it's not quite so strict as whole-file at 80 or 100 it would
probably look better if this matched the other method comments.

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

Done.

+     * Draws a path definedy by the path and the bits in the stencil buffer. The fill must be
+     * either even/odd or winding (not inverse or hairline). It will respect the HW antialias flag
+     * on the draw state (if possible in the 3D API).
+     */
+    void drawPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill);

[Mark Kilgard, 2013/09/13 15:42:24]

Really drawPath is filling the path so does fillPath make more sense here?

Perhaps it should be named that way?

For another commit...

I'd like to see a similar strokePath version so we can do
glStencilStrokePathNV/glCoverStrokePathNV similarly.

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

The fillPath does not seem to differ that significantly from strokePath to
justify the extra boilerplate that would be needed IMO.

I'll call this fillPath now and then rename the function to drawPath in the
later commit, just to pre-empt discussing this comment now.

+
+    /**
      * Helper function for drawing rects. It performs a geometry src push and pop
      * and thus will finalize any reserved geometry.
      *
@@ -833,6 +840,7 @@ private:
                             const SkRect* localRect,
                             const SkMatrix* localMatrix);
     virtual void onStencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill) = 0;
+    virtual void onDrawPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill) = 0;
 
     // helpers for reserving vertex and index space.
     bool reserveVertexSpace(size_t vertexSize,