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/SkFilterQuality.h" 12 #include "include/core/SkImageFilter.h" 13 #include "include/core/SkMatrix.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkRefCnt.h" 17 #include "include/core/SkScalar.h" 18 #include "include/core/SkSize.h" 19 #include "include/core/SkString.h" 20 #include "include/core/SkTypes.h" 21 #include "include/effects/SkImageFilters.h" 22 23 #define RESIZE_FACTOR_X SkIntToScalar(2) 24 #define RESIZE_FACTOR_Y SkIntToScalar(5) 25 26 namespace skiagm { 27 28 class ImageFiltersStrokedGM : public GM { 29 public: ImageFiltersStrokedGM()30 ImageFiltersStrokedGM() { 31 this->setBGColor(0x00000000); 32 } 33 34 protected: 35 onShortName()36 SkString onShortName() override { 37 return SkString("imagefiltersstroked"); 38 } 39 onISize()40 SkISize onISize() override { 41 return SkISize::Make(860, 500); 42 } 43 draw_circle(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)44 static void draw_circle(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 45 canvas->drawCircle(r.centerX(), r.centerY(), 46 r.width() * 2 / 5, paint); 47 } 48 draw_line(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)49 static void draw_line(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 50 canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, paint); 51 } 52 draw_rect(SkCanvas * canvas,const SkRect & r,const SkPaint & paint)53 static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& paint) { 54 canvas->drawRect(r, paint); 55 } 56 onDraw(SkCanvas * canvas)57 void onDraw(SkCanvas* canvas) override { 58 void (*drawProc[])(SkCanvas*, const SkRect&, const SkPaint&) = { 59 draw_line, draw_rect, draw_circle, 60 }; 61 62 canvas->clear(SK_ColorBLACK); 63 64 SkMatrix resizeMatrix; 65 resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y); 66 67 sk_sp<SkImageFilter> filters[] = { 68 SkImageFilters::Blur(5, 5, nullptr), 69 SkImageFilters::DropShadow(10, 10, 3, 3, SK_ColorGREEN, nullptr), 70 SkImageFilters::Offset(-16, 32, nullptr), 71 SkImageFilters::MatrixTransform(resizeMatrix, kNone_SkFilterQuality, nullptr), 72 }; 73 74 SkRect r = SkRect::MakeWH(64, 64); 75 SkScalar margin = 32; 76 SkPaint paint; 77 paint.setColor(SK_ColorWHITE); 78 paint.setAntiAlias(true); 79 paint.setStrokeWidth(10); 80 paint.setStyle(SkPaint::kStroke_Style); 81 82 for (size_t i = 0; i < SK_ARRAY_COUNT(drawProc); ++i) { 83 canvas->translate(0, margin); 84 canvas->save(); 85 for (size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) { 86 canvas->translate(margin, 0); 87 canvas->save(); 88 if (2 == j) { 89 canvas->translate(16, -32); 90 } else if (3 == j) { 91 canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), 92 SkScalarInvert(RESIZE_FACTOR_Y)); 93 } 94 paint.setImageFilter(filters[j]); 95 drawProc[i](canvas, r, paint); 96 canvas->restore(); 97 canvas->translate(r.width() + margin, 0); 98 } 99 canvas->restore(); 100 canvas->translate(0, r.height()); 101 } 102 } 103 104 private: 105 typedef GM INHERITED; 106 }; 107 108 ////////////////////////////////////////////////////////////////////////////// 109 110 DEF_GM(return new ImageFiltersStrokedGM;) 111 112 } 113