add peekPixels to SkCanvas and SkSurface

clone of https://codereview.chromium.org/159723006/

Review URL: https://codereview.chromium.org/161733002

git-svn-id: http://skia.googlecode.com/svn/trunk@13427 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 3 insertions, 6 deletions

diff --git a/gm/offsetimagefilter.cpp b/gm/offsetimagefilter.cpp
index 1b76ba2bc9..0425311b0a 100644
--- a/gm/offsetimagefilter.cpp
+++ b/gm/offsetimagefilter.cpp
@@ -28,8 +28,7 @@ protected:
 
     void make_bitmap() {
         fBitmap.allocN32Pixels(80, 80);
-        SkBitmapDevice device(fBitmap);
-        SkCanvas canvas(&device);
+        SkCanvas canvas(fBitmap);
         canvas.clear(0x00000000);
         SkPaint paint;
         paint.setAntiAlias(true);
@@ -40,10 +39,8 @@ protected:
     }
 
     void make_checkerboard() {
-        fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, 80, 80);
-        fCheckerboard.allocPixels();
-        SkBitmapDevice device(fCheckerboard);
-        SkCanvas canvas(&device);
+        fCheckerboard.allocN32Pixels(80, 80);
+        SkCanvas canvas(fCheckerboard);
         canvas.clear(0x00000000);
         SkPaint darkPaint;
         darkPaint.setColor(0xFF404040);