senorblanco@chromium.org | 535e1cc | 2014-01-14 22:20:48 +0000 | [diff] [blame^] | 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 | } |