Fix drawBitmap() of scratch texture.

gm/imagefiltersgraph.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #include "SkArithmeticMode.h"
@@ skipping 91 matching lines @@
         SkCanvas canvas(&device);
         canvas.clear(0x00000000);
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setColor(0xFFFFFFFF);
         paint.setTextSize(SkIntToScalar(96));
         const char* str = "e";
         canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
     }
 
+    void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint) {
+        canvas->save();
+        canvas->clipRect(SkRect::MakeXYWH(0, 0,
+            SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())));
+        canvas->drawBitmap(bitmap, 0, 0, &paint);
+        canvas->restore();
+    }
+
     virtual SkISize onISize() { return SkISize::Make(500, 150); }
 
     virtual void onDraw(SkCanvas* canvas) {
         if (!fInitialized) {
             this->make_bitmap();
             fInitialized = true;
         }
         canvas->clear(0x00000000);
         {
             SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
             SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED,
                                                          SkXfermode::kSrcIn_Mode));
             SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(4.0f, 4.0f, bitmapSource));
             SkAutoTUnref<SkImageFilter> erode(new SkErodeImageFilter(4, 4, blur));
             SkAutoTUnref<SkImageFilter> color(SkColorFilterImageFilter::Create(cf, erode));
             SkAutoTUnref<SkImageFilter> merge(new SkMergeImageFilter(blur, color));
 
             SkPaint paint;
             paint.setImageFilter(merge);
             canvas->drawPaint(paint);
+            canvas->translate(SkIntToScalar(100), 0);
         }
         {
             SkAutoTUnref<SkImageFilter> morph(new SkDilateImageFilter(5, 5));
 
             SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
                                     0, SK_Scalar1, 0, 0, 0,
                                     0, 0, SK_Scalar1, 0, 0,
                                     0, 0, 0, SkFloatToScalar(0.5f), 0 };
 
             SkAutoTUnref<SkColorFilter> matrixFilter(new SkColorMatrixFilter(matrix));
             SkAutoTUnref<SkImageFilter> colorMorph(SkColorFilterImageFilter::Create(matrixFilter, morph));
             SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
             SkAutoTUnref<SkImageFilter> blendColor(new SkXfermodeImageFilter(mode, colorMorph));
 
             SkPaint paint;
             paint.setImageFilter(blendColor);
-            canvas->drawBitmap(fBitmap, 100, 0, &paint);
+            drawClippedBitmap(canvas, fBitmap, paint);
+            canvas->translate(SkIntToScalar(100), 0);
         }
         {
             SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
                                     0, SK_Scalar1, 0, 0, 0,
                                     0, 0, SK_Scalar1, 0, 0,
                                     0, 0, 0, SkFloatToScalar(0.5f), 0 };
             SkColorMatrixFilter matrixCF(matrix);
             SkAutoTUnref<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Create(&matrixCF));
             SimpleOffsetFilter offsetFilter(SkIntToScalar(10), SkIntToScalar(10), matrixFilter);
 
             SkAutoTUnref<SkXfermode> arith(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
             SkXfermodeImageFilter arithFilter(arith, matrixFilter, &offsetFilter);
 
             SkPaint paint;
             paint.setImageFilter(&arithFilter);
-            canvas->drawSprite(fBitmap, 200, 0, &paint);
+            drawClippedBitmap(canvas, fBitmap, paint);
+            canvas->translate(SkIntToScalar(100), 0);
+        }
+        {
+            SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(
+              SkIntToScalar(10), SkIntToScalar(10)));
+
+            SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcIn_Mode));
+            SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100)));
+            SkAutoTUnref<SkImageFilter> blend(new SkXfermodeImageFilter(mode, blur, NULL, &cropRect));
+
+            SkPaint paint;
+            paint.setImageFilter(blend);
+            drawClippedBitmap(canvas, fBitmap, paint);
+            canvas->translate(SkIntToScalar(100), 0);
         }
     }
 
 private:
     typedef GM INHERITED;
     SkBitmap fBitmap;
     bool fInitialized;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
 static skiagm::GMRegistry reg(MyFactory);