Implement path cover with nv_path_rendering

src/gpu/GrGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGpu_DEFINED
 #define GrGpu_DEFINED
 
@@ skipping 317 matching lines @@
     virtual void clearStencilClip(const SkIRect& rect, bool insideClip) = 0;
 
     enum PrivateDrawStateStateBits {
         kFirstBit = (GrDrawState::kLastPublicStateBit << 1),
 
         kModifyStencilClip_StateBit = kFirstBit, // allows draws to modify
                                                  // stencil bits used for
                                                  // clipping.
     };
 
+    void setStencilPathSettings(const GrStencilSettings& settings) {
+        fStencilPathSettings = settings;
+    }
+
 protected:
     enum DrawType {
         kDrawPoints_DrawType,
         kDrawLines_DrawType,
         kDrawTriangles_DrawType,
         kStencilPath_DrawType,
+        kDrawPath_DrawType,
     };
 
     DrawType PrimTypeToDrawType(GrPrimitiveType type) {
         switch (type) {
             case kTriangles_GrPrimitiveType:
             case kTriangleStrip_GrPrimitiveType:
             case kTriangleFan_GrPrimitiveType:
                 return kDrawTriangles_DrawType;
             case kPoints_GrPrimitiveType:
                 return kDrawPoints_DrawType;
@@ skipping 36 matching lines @@
     }
 
     // The state of the scissor is controlled by the clip manager
     struct ScissorState {
         bool    fEnabled;
         SkIRect fRect;
     } fScissorState;
 
     // The final stencil settings to use as determined by the clip manager.
     GrStencilSettings fStencilSettings;
+    GrStencilSettings fStencilPathSettings;
 
     // Derived classes need access to this so they can fill it out in their
     // constructors
     bool    fConfigRenderSupport[kGrPixelConfigCnt];
 
     // Helpers for setting up geometry state
     void finalizeReservedVertices();
     void finalizeReservedIndices();
 
 private:
@@ skipping 23 matching lines @@
     virtual GrVertexBuffer* onCreateVertexBuffer(uint32_t size, bool dynamic) = 0;
     virtual GrIndexBuffer* onCreateIndexBuffer(uint32_t size, bool dynamic) = 0;
     virtual GrPath* onCreatePath(const SkPath& path) = 0;
 
     // overridden by backend-specific derived class to perform the clear and
     // clearRect. NULL rect means clear whole target.
     virtual void onClear(const SkIRect* rect, GrColor color) = 0;
 
     // overridden by backend-specific derived class to perform the draw call.
     virtual void onGpuDraw(const DrawInfo&) = 0;
-    // when GrDrawTarget::stencilPath is called the draw state's current stencil
-    // settings are ignored. Instead the GrGpu decides the stencil rules
-    // necessary to stencil the path. These are still subject to filtering by
-    // the clip mask manager.
-    virtual void setStencilPathSettings(const GrPath&,
-                                        SkPath::FillType,
-                                        GrStencilSettings* settings) = 0;
+
     // overridden by backend-specific derived class to perform the path stenciling.
+    virtual const GrStencilSettings& getStencilPathSettings(const GrPath&,
+                                                            SkPath::FillType) = 0;
     virtual void onGpuStencilPath(const GrPath*, SkPath::FillType) = 0;
+    virtual void onGpuDrawPath(const GrPath*, SkPath::FillType) = 0;
 
     // overridden by backend-specific derived class to perform flush
     virtual void onForceRenderTargetFlush() = 0;
 
     // overridden by backend-specific derived class to perform the read pixels.
     virtual bool onReadPixels(GrRenderTarget* target,
                               int left, int top, int width, int height,
                               GrPixelConfig,
                               void* buffer,
                               size_t rowBytes) = 0;
@@ skipping 25 matching lines @@
     virtual void clearStencil() = 0;
 
     // Given a rt, find or create a stencil buffer and attach it
     bool attachStencilBufferToRenderTarget(GrRenderTarget* target);
 
     // GrDrawTarget overrides
     virtual void onDraw(const DrawInfo&) SK_OVERRIDE;
     virtual void onStencilPath(const GrPath* path, const SkStrokeRec& stroke,
                                SkPath::FillType) SK_OVERRIDE;
 
+    virtual void onDrawPath(const GrPath* path, const SkStrokeRec& stroke,
+                               SkPath::FillType) SK_OVERRIDE;
+
     // readies the pools to provide vertex/index data.
     void prepareVertexPool();
     void prepareIndexPool();
 
     void resetContext() {
         // We call this because the client may have messed with the
         // stencil buffer. Perhaps we should detect whether it is a
         // internally created stencil buffer and if so skip the invalidate.
         fClipMaskManager.invalidateStencilMask();
         this->onResetContext(fResetBits);
@@ skipping 22 matching lines @@
     // these are mutable so they can be created on-demand
     mutable GrIndexBuffer*                                              fQuadIndexBuffer;
     // Used to abandon/release all resources created by this GrGpu. TODO: Move this
     // functionality to GrResourceCache.
     ResourceList                                                        fResourceList;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif