Initial implementation of GPU no filter NinePatch

include/gpu/GrDrawContext.h

Index: include/gpu/GrDrawContext.h
diff --git a/include/gpu/GrDrawContext.h b/include/gpu/GrDrawContext.h
index d55818b6d7420d40f8fa44a924d422abd86e2323..77c3c06fdb16a385824b42f9c2c3aa2e2ca98373 100644
--- a/include/gpu/GrDrawContext.h
+++ b/include/gpu/GrDrawContext.h
@@ -26,6 +26,7 @@ class GrRenderTarget;
 class GrStrokeInfo;
 class GrSurface;
 class GrTextContext;

[robertphillips, 2015/11/18 18:12:06]

Do we need this guy ?

[joshualitt, 2015/11/18 19:07:07]

Acknowledged.

+class SkBitmap;
 class SkDrawFilter;
 struct SkIPoint;
 struct SkIRect;
@@ -242,6 +243,27 @@ public:
                   const SkRect& oval,
                   const GrStrokeInfo& strokeInfo);
 
+    /**
+     *  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
+     */
+    void drawImageNine(const GrClip&,
+                       const GrPaint& paint,
+                       const SkMatrix& viewMatrix,
+                       int imageWidth,
+                       int imageHeight,
+                       const SkIRect& center,
+                       const SkRect& dst);
 
     /**
      * Draws a batch