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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 #include "SkColor.h" |
| 10 #include "SkResizeImageFilter.h" |
| 11 |
| 12 namespace skiagm { |
| 13 |
| 14 class ResizeGM : public GM { |
| 15 public: |
| 16 ResizeGM() { |
| 17 this->setBGColor(0x00000000); |
| 18 } |
| 19 |
| 20 protected: |
| 21 virtual SkString onShortName() { |
| 22 return SkString("resizeimagefilter"); |
| 23 } |
| 24 |
| 25 void draw(SkCanvas* canvas, |
| 26 const SkRect& rect, |
| 27 const SkSize& deviceSize, |
| 28 SkPaint::FilterLevel filterLevel) { |
| 29 SkRect dstRect; |
| 30 canvas->getTotalMatrix().mapRect(&dstRect, rect); |
| 31 canvas->save(); |
| 32 SkScalar deviceScaleX = SkScalarDiv(deviceSize.width(), dstRect.width())
; |
| 33 SkScalar deviceScaleY = SkScalarDiv(deviceSize.height(), dstRect.height(
)); |
| 34 canvas->translate(rect.x(), rect.y()); |
| 35 canvas->scale(deviceScaleX, deviceScaleY); |
| 36 canvas->translate(-rect.x(), -rect.y()); |
| 37 SkAutoTUnref<SkImageFilter> imageFilter( |
| 38 new SkResizeImageFilter(SkScalarInvert(deviceScaleX), |
| 39 SkScalarInvert(deviceScaleY), |
| 40 filterLevel)); |
| 41 SkPaint filteredPaint; |
| 42 filteredPaint.setImageFilter(imageFilter.get()); |
| 43 canvas->saveLayer(&rect, &filteredPaint); |
| 44 SkPaint paint; |
| 45 paint.setColor(0xFF00FF00); |
| 46 SkRect ovalRect = rect; |
| 47 ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4)); |
| 48 canvas->drawOval(ovalRect, paint); |
| 49 canvas->restore(); // for saveLayer |
| 50 canvas->restore(); |
| 51 } |
| 52 |
| 53 virtual SkISize onISize() { |
| 54 return make_isize(420, 100); |
| 55 } |
| 56 |
| 57 virtual void onDraw(SkCanvas* canvas) { |
| 58 canvas->clear(0x00000000); |
| 59 |
| 60 SkRect srcRect = SkRect::MakeWH(96, 96); |
| 61 |
| 62 SkSize deviceSize = SkSize::Make(16, 16); |
| 63 draw(canvas, |
| 64 srcRect, |
| 65 deviceSize, |
| 66 SkPaint::kNone_FilterLevel); |
| 67 |
| 68 canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| 69 draw(canvas, |
| 70 srcRect, |
| 71 deviceSize, |
| 72 SkPaint::kLow_FilterLevel); |
| 73 |
| 74 canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| 75 draw(canvas, |
| 76 srcRect, |
| 77 deviceSize, |
| 78 SkPaint::kMedium_FilterLevel); |
| 79 |
| 80 canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| 81 draw(canvas, |
| 82 srcRect, |
| 83 deviceSize, |
| 84 SkPaint::kHigh_FilterLevel); |
| 85 } |
| 86 |
| 87 private: |
| 88 typedef GM INHERITED; |
| 89 }; |
| 90 |
| 91 ////////////////////////////////////////////////////////////////////////////// |
| 92 |
| 93 static GM* MyFactory(void*) { return new ResizeGM; } |
| 94 static GMRegistry reg(MyFactory); |
| 95 |
| 96 } |
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