1 /* 2 * Copyright 2012 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/SkBitmap.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkFont.h" 12 #include "include/core/SkImageFilter.h" 13 #include "include/core/SkPaint.h" 14 #include "include/core/SkRect.h" 15 #include "include/core/SkScalar.h" 16 #include "include/core/SkSize.h" 17 #include "include/core/SkString.h" 18 #include "include/core/SkTypeface.h" 19 #include "include/core/SkTypes.h" 20 #include "include/effects/SkImageFilters.h" 21 #include "tools/ToolUtils.h" 22 23 #define WIDTH 700 24 #define HEIGHT 560 25 26 namespace skiagm { 27 28 class MorphologyGM : public GM { 29 public: MorphologyGM()30 MorphologyGM() { 31 this->setBGColor(0xFF000000); 32 } 33 34 protected: onShortName()35 SkString onShortName() override { 36 return SkString("morphology"); 37 } 38 onOnceBeforeDraw()39 void onOnceBeforeDraw() override { 40 auto surf = SkSurface::MakeRasterN32Premul(135, 135); 41 42 SkFont font(ToolUtils::create_portable_typeface(), 64.0f); 43 SkPaint paint; 44 paint.setColor(0xFFFFFFFF); 45 surf->getCanvas()->drawString("ABC", 10, 55, font, paint); 46 surf->getCanvas()->drawString("XYZ", 10, 110, font, paint); 47 48 fImage = surf->makeImageSnapshot(); 49 } 50 onISize()51 SkISize onISize() override { 52 return SkISize::Make(WIDTH, HEIGHT); 53 } 54 drawClippedBitmap(SkCanvas * canvas,const SkPaint & paint,int x,int y)55 void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) { 56 canvas->save(); 57 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 58 canvas->clipIRect(fImage->bounds()); 59 canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint); 60 canvas->restore(); 61 } 62 onDraw(SkCanvas * canvas)63 void onDraw(SkCanvas* canvas) override { 64 struct { 65 int fWidth, fHeight; 66 int fRadiusX, fRadiusY; 67 } samples[] = { 68 { 140, 140, 0, 0 }, 69 { 140, 140, 0, 2 }, 70 { 140, 140, 2, 0 }, 71 { 140, 140, 2, 2 }, 72 { 24, 24, 25, 25 }, 73 }; 74 SkPaint paint; 75 SkIRect cropRect = SkIRect::MakeXYWH(25, 20, 100, 80); 76 77 for (unsigned j = 0; j < 4; ++j) { 78 for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) { 79 const SkIRect* cr = j & 0x02 ? &cropRect : nullptr; 80 if (j & 0x01) { 81 paint.setImageFilter(SkImageFilters::Erode( 82 samples[i].fRadiusX, samples[i].fRadiusY, nullptr, cr)); 83 } else { 84 paint.setImageFilter(SkImageFilters::Dilate( 85 samples[i].fRadiusX, samples[i].fRadiusY, nullptr, cr)); 86 } 87 this->drawClippedBitmap(canvas, paint, i * 140, j * 140); 88 } 89 } 90 } 91 92 private: 93 sk_sp<SkImage> fImage; 94 95 using INHERITED = GM; 96 }; 97 98 ////////////////////////////////////////////////////////////////////////////// 99 100 DEF_GM(return new MorphologyGM;) 101 102 } // namespace skiagm 103