Batched implementation of drawLattice() for GPU

include/gpu/GrDrawContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawContext_DEFINED
 #define GrDrawContext_DEFINED
 
@@ skipping 17 matching lines @@
 class GrPaint;
 class GrPathProcessor;
 class GrPipelineBuilder;
 class GrRenderTarget;
 class GrStyle;
 class GrSurface;
 struct GrUserStencilSettings;
 class SkDrawFilter;
 struct SkIPoint;
 struct SkIRect;
+class SkLatticeIter;
 class SkMatrix;
 class SkPaint;
 class SkPath;
 struct SkPoint;
 struct SkRect;
 class SkRRect;
 struct SkRSXform;
 class SkTextBlob;
 
 /*
@@ skipping 176 matching lines @@
      * @param oval          the bounding rect of the oval.
      * @param style         style to apply to the oval. Currently path effects are not allowed.
      */
     void drawOval(const GrClip&,
                   const GrPaint& paint,
                   const SkMatrix& viewMatrix,
                   const SkRect& oval,
                   const GrStyle& style);
 
     /**
-     *  Draw the image stretched differentially to fit into dst.
-     *  center is a rect within the image, and logically divides the image
-     *  into 9 sections (3x3). For example, if the middle pixel of a [5x5]
-     *  image is the "center", then the center-rect should be [2, 2, 3, 3].
-     *
-     *  If the dst is >= the image size, then...
-     *  - The 4 corners are not stretched at all.
-     *  - The sides are stretched in only one axis.
-     *  - The center is stretched in both axes.
-     * Else, for each axis where dst < image,
-     *  - The corners shrink proportionally
-     *  - The sides (along the shrink axis) and center are not drawn
+     *  Draw the image as a set of rects, specified by |iter|.
      */
-    void drawImageNine(const GrClip&,
-                       const GrPaint& paint,
-                       const SkMatrix& viewMatrix,
-                       int imageWidth,
-                       int imageHeight,
-                       const SkIRect& center,
-                       const SkRect& dst);
+    void drawImageLattice(const GrClip&,
+                          const GrPaint& paint,
+                          const SkMatrix& viewMatrix,
+                          int imageWidth,
+                          int imageHeight,
+                          std::unique_ptr<SkLatticeIter> iter,
+                          const SkRect& dst);
 
     /**
      * After this returns any pending surface IO will be issued to the backend 3D API and
      * if the surface has MSAA it will be resolved.
      */
     void prepareForExternalIO();
 
     bool isStencilBufferMultisampled() const {
         return fRenderTarget->isStencilBufferMultisampled();
     }
@@ skipping 107 matching lines @@
 
     sk_sp<SkColorSpace>               fColorSpace;
     SkSurfaceProps                    fSurfaceProps;
     GrAuditTrail*                     fAuditTrail;
 
     // In debug builds we guard against improper thread handling
     SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;)
 };
 
 #endif