1 /* 2 * Copyright 2014 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 "SkMatrixImageFilter.h" 11 12 namespace skiagm { 13 14 class MatrixImageFilterGM : public GM { 15 public: 16 MatrixImageFilterGM() { 17 this->setBGColor(0x00000000); 18 } 19 20 protected: 21 virtual SkString onShortName() { 22 return SkString("matriximagefilter"); 23 } 24 25 void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap, 26 const SkMatrix& matrix, SkPaint::FilterLevel filterLevel) { 27 SkAutoTUnref<SkImageFilter> imageFilter( 28 SkMatrixImageFilter::Create(matrix, filterLevel)); 29 SkPaint paint; 30 paint.setImageFilter(imageFilter.get()); 31 canvas->saveLayer(&rect, &paint); 32 canvas->drawBitmap(bitmap, 0, 0); 33 canvas->restore(); 34 } 35 36 virtual SkISize onISize() { 37 return SkISize::Make(420, 100); 38 } 39 40 void make_checkerboard(SkBitmap* bitmap) { 41 bitmap->allocN32Pixels(64, 64); 42 SkCanvas canvas(*bitmap); 43 SkPaint darkPaint; 44 darkPaint.setColor(0xFF404040); 45 SkPaint lightPaint; 46 lightPaint.setColor(0xFFA0A0A0); 47 for (int y = 0; y < 64; y += 32) { 48 for (int x = 0; x < 64; x += 32) { 49 canvas.save(); 50 canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); 51 canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint); 52 canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint); 53 canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint); 54 canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint); 55 canvas.restore(); 56 } 57 } 58 } 59 60 virtual void onDraw(SkCanvas* canvas) { 61 canvas->clear(0x00000000); 62 SkMatrix matrix; 63 SkScalar margin = SkIntToScalar(10); 64 matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2)); 65 SkBitmap checkerboard; 66 make_checkerboard(&checkerboard); 67 68 SkRect srcRect = SkRect::MakeWH(96, 96); 69 70 canvas->translate(margin, margin); 71 draw(canvas, srcRect, checkerboard, matrix, SkPaint::kNone_FilterLevel); 72 73 canvas->translate(srcRect.width() + margin, 0); 74 draw(canvas, srcRect, checkerboard, matrix, SkPaint::kLow_FilterLevel); 75 76 #if 0 77 // This may be causing Mac 10.6 to barf. 78 canvas->translate(srcRect.width() + margin, 0); 79 draw(canvas, srcRect, checkerboard, matrix, SkPaint::kMedium_FilterLevel); 80 81 canvas->translate(srcRect.width() + margin, 0); 82 draw(canvas, srcRect, checkerboard, matrix, SkPaint::kHigh_FilterLevel); 83 #endif 84 } 85 86 private: 87 typedef GM INHERITED; 88 }; 89 90 ////////////////////////////////////////////////////////////////////////////// 91 92 static GM* MyFactory(void*) { return new MatrixImageFilterGM; } 93 static GMRegistry reg(MyFactory); 94 95 } 96
