add SkCanvas::drawAtlas

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 8a71f1d0bbe9827f6eeae21aee322e59c8e65808..ad8890dcb063d9fdfd361bf42b6157db7235503d 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -28,6 +28,7 @@ class SkImage;
 class SkMetaData;
 class SkPicture;
 class SkRRect;
+struct SkRSXform;
 class SkSurface;
 class SkSurface_Base;
 class SkTextBlob;
@@ -1024,6 +1025,12 @@ public:
                    const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint);
 
     /**
+     *  colors, cullRect and paint are all optional.
+     */
+    void drawAtlas(const SkImage* atlas, const SkRSXform[], const SkRect tex[], const SkColor[],

[bsalomon, 2015/06/15 15:44:15]

What does SkRSXform apply to? A standard rectangle?

[reed1, 2015/06/15 18:52:33]

added to dox:

xform maps [0, 0, tex.width, tex.height] -> quad

+                   int count, const SkRect* cullRect, const SkPaint* paint);
+
+    /**
      *  Draw the contents of this drawable into the canvas. If the canvas is async
      *  (e.g. it is recording into a picture) then the drawable will be referenced instead,
      *  to have its draw() method called when the picture is finalized.