Implement stroking a path with nv_path_rendering

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
@@ skipping 308 matching lines @@
     void drawNonIndexed(GrPrimitiveType type,
                         int startVertex,
                         int vertexCount,
                         const SkRect* devBounds = NULL);
 
     /**
      * Draws path into 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 stencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill);
+    void stencilPath(const GrPath*, SkPath::FillType fill);
 
     /**
-     * Fills a path. Fill must not be a hairline. It will respect the HW
+     * Draws a path. Fill must not be a hairline. It will respect the HW
      * antialias flag on the draw state (if possible in the 3D API).
      */
-    void fillPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill);
+    void drawPath(const GrPath*, SkPath::FillType fill);
 
     /**
      * Helper function for drawing rects. It performs a geometry src push and pop
      * and thus will finalize any reserved geometry.
      *
      * @param rect        the rect to draw
      * @param matrix      optional matrix applied to rect (before viewMatrix)
      * @param localRect   optional rect that specifies local coords to map onto
      *                    rect. If NULL then rect serves as the local coords.
      * @param localMatrix optional matrix applied to localRect. If
@@ skipping 102 matching lines @@
      * is intended to give an application some recourse when resources are low.
      */
     virtual void purgeResources() {};
 
     /**
      * For subclass internal use to invoke a call to onDraw(). See DrawInfo below.
      */
     void executeDraw(const DrawInfo& info) { this->onDraw(info); }
 
     /**
-     * For subclass internal use to invoke a call to onFillPath().
+     * For subclass internal use to invoke a call to onDrawPath().
      */
-    void executeFillPath(const GrPath* path, const SkStrokeRec& stroke,
-                         SkPath::FillType fill, const GrDeviceCoordTexture* dstCopy) {
-        this->onFillPath(path, stroke, fill, dstCopy);
+    void executeDrawPath(const GrPath* path, SkPath::FillType fill,
+                         const GrDeviceCoordTexture* dstCopy) {
+        this->onDrawPath(path, fill, dstCopy);
     }
 
     ////////////////////////////////////////////////////////////////////////////
 
     /**
      * See AutoStateRestore below.
      */
     enum ASRInit {
         kPreserve_ASRInit,
         kReset_ASRInit
@@ skipping 358 matching lines @@
     // Implementation of drawRect. The geometry src and vertex attribs will already
     // be saved before this is called and restored afterwards. A subclass may override
     // this to perform more optimal rect rendering. Its draws should be funneled through
     // one of the public GrDrawTarget draw methods (e.g. drawNonIndexed,
     // drawIndexedInstances, ...). The base class draws a two triangle fan using
     // drawNonIndexed from reserved vertex space.
     virtual void onDrawRect(const SkRect& rect,
                             const SkMatrix* matrix,
                             const SkRect* localRect,
                             const SkMatrix* localMatrix);
-    virtual void onStencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill) = 0;
-    virtual void onFillPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType fill,
+
+    virtual void onStencilPath(const GrPath*, SkPath::FillType) = 0;
+    virtual void onDrawPath(const GrPath*, SkPath::FillType,
                             const GrDeviceCoordTexture* dstCopy) = 0;
 
     // helpers for reserving vertex and index space.
     bool reserveVertexSpace(size_t vertexSize,
                             int vertexCount,
                             void** vertices);
     bool reserveIndexSpace(int indexCount, void** indices);
 
     // called by drawIndexed and drawNonIndexed. Use a negative indexCount to
     // indicate non-indexed drawing.
@@ skipping 21 matching lines @@
     const GrClipData*                                               fClip;
     GrDrawState*                                                    fDrawState;
     GrDrawState                                                     fDefaultDrawState;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by DrawTarget.
     GrContext*                                                      fContext;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif