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| 1 /* |
| 2 * Copyright 2013 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "gm.h" |
| 9 |
| 10 #include "SkBitmapSource.h" |
| 11 |
| 12 // This GM exercises the SkBitmapSource ImageFilter class. |
| 13 |
| 14 class BitmapSourceGM : public skiagm::GM { |
| 15 public: |
| 16 BitmapSourceGM() { |
| 17 } |
| 18 |
| 19 protected: |
| 20 virtual SkString onShortName() SK_OVERRIDE { |
| 21 return SkString("bitmapsource"); |
| 22 } |
| 23 |
| 24 void makeBitmap() { |
| 25 fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); |
| 26 fBitmap.allocPixels(); |
| 27 SkBitmapDevice device(fBitmap); |
| 28 SkCanvas canvas(&device); |
| 29 canvas.clear(0x00000000); |
| 30 SkPaint paint; |
| 31 paint.setAntiAlias(true); |
| 32 paint.setColor(0xFFFFFFFF); |
| 33 paint.setTextSize(SkIntToScalar(96)); |
| 34 const char* str = "e"; |
| 35 canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70),
paint); |
| 36 } |
| 37 |
| 38 virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(500, 150); } |
| 39 |
| 40 virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 41 this->makeBitmap(); |
| 42 } |
| 43 |
| 44 static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkIma
geFilter* filter) { |
| 45 SkPaint paint; |
| 46 paint.setImageFilter(filter); |
| 47 canvas->save(); |
| 48 canvas->clipRect(clipRect); |
| 49 canvas->drawPaint(paint); |
| 50 canvas->restore(); |
| 51 } |
| 52 |
| 53 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 54 canvas->clear(0x00000000); |
| 55 { |
| 56 SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30); |
| 57 SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60); |
| 58 SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100); |
| 59 SkRect bounds; |
| 60 fBitmap.getBounds(&bounds); |
| 61 SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap)
); |
| 62 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(new SkBitmapSource(f
Bitmap, srcRect, srcRect)); |
| 63 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(new SkBitmapS
ource(fBitmap, srcRect, dstRect)); |
| 64 SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(new SkBitmapSour
ce(fBitmap, bounds, dstRect)); |
| 65 |
| 66 // Draw an unscaled bitmap. |
| 67 fillRectFiltered(canvas, clipRect, bitmapSource); |
| 68 canvas->translate(SkIntToScalar(100), 0); |
| 69 |
| 70 // Draw an unscaled subset of the source bitmap (srcRect -> srcRect)
. |
| 71 fillRectFiltered(canvas, clipRect, bitmapSourceSrcRect); |
| 72 canvas->translate(SkIntToScalar(100), 0); |
| 73 |
| 74 // Draw a subset of the bitmap scaled to a destination rect (srcRect
-> dstRect). |
| 75 fillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect); |
| 76 canvas->translate(SkIntToScalar(100), 0); |
| 77 |
| 78 // Draw the entire bitmap scaled to a destination rect (bounds -> ds
tRect). |
| 79 fillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly); |
| 80 canvas->translate(SkIntToScalar(100), 0); |
| 81 } |
| 82 } |
| 83 |
| 84 private: |
| 85 SkBitmap fBitmap; |
| 86 typedef GM INHERITED; |
| 87 }; |
| 88 |
| 89 /////////////////////////////////////////////////////////////////////////////// |
| 90 |
| 91 DEF_GM( return new BitmapSourceGM; ) |
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