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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 "SkBicubicImageFilter.h" | |
| 11 | |
| 12 namespace skiagm { | |
| 13 | |
| 14 class BicubicGM : public GM { | |
| 15 public: | |
| 16 BicubicGM() : fInitialized(false) { | |
| 17 this->setBGColor(0x00000000); | |
| 18 } | |
| 19 | |
| 20 protected: | |
| 21 virtual uint32_t onGetFlags() const SK_OVERRIDE { | |
| 22 return kSkipTiled_Flag; | |
| 23 } | |
| 24 | |
| 25 virtual SkString onShortName() { | |
| 26 return SkString("bicubicfilter"); | |
| 27 } | |
| 28 | |
| 29 void make_checkerboard(int width, int height) { | |
| 30 SkASSERT(width % 2 == 0); | |
| 31 SkASSERT(height % 2 == 0); | |
| 32 fCheckerboard.allocN32Pixels(width, height); | |
| 33 for (int y = 0; y < height; y += 2) { | |
| 34 SkPMColor* s = fCheckerboard.getAddr32(0, y); | |
| 35 for (int x = 0; x < width; x += 2) { | |
| 36 *s++ = 0xFFFFFFFF; | |
| 37 *s++ = 0xFF000000; | |
| 38 } | |
| 39 s = fCheckerboard.getAddr32(0, y + 1); | |
| 40 for (int x = 0; x < width; x += 2) { | |
| 41 *s++ = 0xFF000000; | |
| 42 *s++ = 0xFFFFFFFF; | |
| 43 } | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 virtual SkISize onISize() { | |
| 48 return SkISize::Make(400, 300); | |
| 49 } | |
| 50 | |
| 51 virtual void onDraw(SkCanvas* canvas) { | |
| 52 if (!fInitialized) { | |
| 53 make_checkerboard(4, 4); | |
| 54 fInitialized = true; | |
| 55 } | |
| 56 SkScalar sk32 = SkIntToScalar(32); | |
| 57 canvas->clear(0x00000000); | |
| 58 SkPaint bilinearPaint, bicubicPaint; | |
| 59 SkSize scale = SkSize::Make(sk32, sk32); | |
| 60 canvas->save(); | |
| 61 canvas->scale(sk32, sk32); | |
| 62 bilinearPaint.setFilterLevel(SkPaint::kLow_FilterLevel); | |
| 63 canvas->drawBitmap(fCheckerboard, 0, 0, &bilinearPaint); | |
| 64 canvas->restore(); | |
| 65 SkAutoTUnref<SkImageFilter> bicubic(SkBicubicImageFilter::CreateMitchell
(scale)); | |
| 66 bicubicPaint.setImageFilter(bicubic); | |
| 67 SkRect srcBounds; | |
| 68 fCheckerboard.getBounds(&srcBounds); | |
| 69 canvas->translate(SkIntToScalar(140), 0); | |
| 70 canvas->saveLayer(&srcBounds, &bicubicPaint); | |
| 71 canvas->drawBitmap(fCheckerboard, 0, 0); | |
| 72 canvas->restore(); | |
| 73 } | |
| 74 | |
| 75 private: | |
| 76 typedef GM INHERITED; | |
| 77 SkBitmap fCheckerboard; | |
| 78 bool fInitialized; | |
| 79 }; | |
| 80 | |
| 81 ////////////////////////////////////////////////////////////////////////////// | |
| 82 | |
| 83 static GM* MyFactory(void*) { return new BicubicGM; } | |
| 84 static GMRegistry reg(MyFactory); | |
| 85 | |
| 86 } | |
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