1 /* 2 * Copyright 2015 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/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkColor.h" 11 #include "include/core/SkImageFilter.h" 12 #include "include/core/SkMatrix.h" 13 #include "include/core/SkPaint.h" 14 #include "include/core/SkRect.h" 15 #include "include/core/SkRefCnt.h" 16 #include "include/core/SkScalar.h" 17 #include "include/core/SkSize.h" 18 #include "include/core/SkString.h" 19 #include "include/core/SkTypes.h" 20 #include "include/effects/SkImageFilters.h" 21 22 #define RESIZE_FACTOR_X SkIntToScalar(2) 23 #define RESIZE_FACTOR_Y SkIntToScalar(5) 24 25 namespace skiagm { 26 27 class ImageFiltersStrokedGM : public GM { 28 public: ImageFiltersStrokedGM()29 ImageFiltersStrokedGM() { 30 this->setBGColor(0x00000000); 31 } 32 33 protected: getName() const34 SkString getName() const override { return SkString("imagefiltersstroked"); } 35 getISize()36 SkISize getISize() override { return SkISize::Make(860, 500); } 37 draw_circle(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)38 static void draw_circle(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 39 canvas->drawCircle(r.centerX(), r.centerY(), 40 r.width() * 2 / 5, paint); 41 } 42 draw_line(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)43 static void draw_line(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 44 canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, paint); 45 } 46 draw_rect(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)47 static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 48 canvas->drawRect(r, paint); 49 } 50 onDraw(SkCanvas * canvas)51 void onDraw(SkCanvas* canvas) override { 52 void (*drawProc[])(SkCanvas*, const SkRect&, const SkPaint&) = { 53 draw_line, draw_rect, draw_circle, 54 }; 55 56 canvas->clear(SK_ColorBLACK); 57 58 SkMatrix resizeMatrix; 59 resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y); 60 61 sk_sp<SkImageFilter> filters[] = { 62 SkImageFilters::Blur(5, 5, nullptr), 63 SkImageFilters::DropShadow(10, 10, 3, 3, SK_ColorGREEN, nullptr), 64 SkImageFilters::Offset(-16, 32, nullptr), 65 SkImageFilters::MatrixTransform(resizeMatrix, SkSamplingOptions(), nullptr), 66 }; 67 68 SkRect r = SkRect::MakeWH(64, 64); 69 SkScalar margin = 32; 70 SkPaint paint; 71 paint.setColor(SK_ColorWHITE); 72 paint.setAntiAlias(true); 73 paint.setStrokeWidth(10); 74 paint.setStyle(SkPaint::kStroke_Style); 75 76 for (size_t i = 0; i < std::size(drawProc); ++i) { 77 canvas->translate(0, margin); 78 canvas->save(); 79 for (size_t j = 0; j < std::size(filters); ++j) { 80 canvas->translate(margin, 0); 81 canvas->save(); 82 if (2 == j) { 83 canvas->translate(16, -32); 84 } else if (3 == j) { 85 canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), 86 SkScalarInvert(RESIZE_FACTOR_Y)); 87 } 88 paint.setImageFilter(filters[j]); 89 drawProc[i](canvas, r, paint); 90 canvas->restore(); 91 canvas->translate(r.width() + margin, 0); 92 } 93 canvas->restore(); 94 canvas->translate(0, r.height()); 95 } 96 } 97 98 private: 99 using INHERITED = GM; 100 }; 101 102 ////////////////////////////////////////////////////////////////////////////// 103 104 DEF_GM(return new ImageFiltersStrokedGM;) 105 106 } // namespace skiagm 107