use SkTreatAsSprite in SkDraw (with guard for chrome if needed)

git-svn-id: http://skia.googlecode.com/svn/trunk@6994 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 13 insertions, 2 deletions

diff --git a/src/core/SkMatrixUtils.h b/src/core/SkMatrixUtils.h
index 04c0892776..2074267b7d 100644
--- a/src/core/SkMatrixUtils.h
+++ b/src/core/SkMatrixUtils.h
@@ -17,16 +17,27 @@
 #define kSkSubPixelBitsForBilerp   4
 
 /**
- *  Given a matrix and a src-rect, return true if the computed dst-rect would
+ *  Given a matrix and width/height, return true if the computed dst-rect would
  *  align such that there is a 1-to-1 coorspondence between src and dst pixels.
  *  This can be called by drawing code to see if drawBitmap can be turned into
  *  drawSprite (which is faster).
  *
+ *  The src-rect is defined to be { 0, 0, width, height }
+ *
  *  The "closeness" test is based on the subpixelBits parameter. Pass 0 for
  *  round-to-nearest behavior (e.g. nearest neighbor sampling). Pass the number
  *  of subpixel-bits to simulate filtering.
  */
-bool SkTreatAsSprite(const SkMatrix&, const SkRect& src, unsigned subpixelBits);
+bool SkTreatAsSprite(const SkMatrix&, int width, int height,
+                     unsigned subpixelBits);
 
+/**
+ *  Calls SkTreatAsSprite() with default subpixelBits value to match Skia's
+ *  filter-bitmap implementation (i.e. kSkSubPixelBitsForBilerp).
+ */
+static inline bool SkTreatAsSpriteFilter(const SkMatrix& matrix,
+                                         int width, int height) {
+    return SkTreatAsSprite(matrix, width, height, kSkSubPixelBitsForBilerp);
+}
 
 #endif