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| 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.h" |
| 9 #include "SkCanvas.h" |
| 10 #include "SkData.h" |
| 11 #include "SkImage.h" |
| 12 #include "SkPictureRecorder.h" |
| 13 #include "SkSurface.h" |
| 14 |
| 15 static void draw_something(SkCanvas* canvas, const SkRect& bounds) { |
| 16 SkPaint paint; |
| 17 paint.setAntiAlias(true); |
| 18 paint.setColor(SK_ColorRED); |
| 19 paint.setStyle(SkPaint::kStroke_Style); |
| 20 paint.setStrokeWidth(10); |
| 21 canvas->drawRect(bounds, paint); |
| 22 paint.setStyle(SkPaint::kFill_Style); |
| 23 paint.setColor(SK_ColorBLUE); |
| 24 canvas->drawOval(bounds, paint); |
| 25 } |
| 26 |
| 27 typedef SkImage* (*ImageMakerProc)(GrContext*, const SkPicture*, const SkImageIn
fo&); |
| 28 |
| 29 static SkImage* make_raster(GrContext*, const SkPicture* pic, const SkImageInfo&
info) { |
| 30 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); |
| 31 surface->getCanvas()->clear(0); |
| 32 surface->getCanvas()->drawPicture(pic); |
| 33 return surface->newImageSnapshot(); |
| 34 } |
| 35 |
| 36 static SkImage* make_texture(GrContext* ctx, const SkPicture* pic, const SkImage
Info& info) { |
| 37 if (!ctx) { |
| 38 return nullptr; |
| 39 } |
| 40 SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::k
No_Budgeted, |
| 41 info, 0)); |
| 42 surface->getCanvas()->clear(0); |
| 43 surface->getCanvas()->drawPicture(pic); |
| 44 return surface->newImageSnapshot(); |
| 45 } |
| 46 |
| 47 static SkImage* make_pict_gen(GrContext*, const SkPicture* pic, const SkImageInf
o& info) { |
| 48 return SkImage::NewFromPicture(pic, info.dimensions(), nullptr, nullptr); |
| 49 } |
| 50 |
| 51 static SkImage* make_encode_gen(GrContext* ctx, const SkPicture* pic, const SkIm
ageInfo& info) { |
| 52 SkAutoTUnref<SkImage> src(make_raster(ctx, pic, info)); |
| 53 if (!src) { |
| 54 return nullptr; |
| 55 } |
| 56 SkAutoTUnref<SkData> encoded(src->encode(SkImageEncoder::kPNG_Type, 100)); |
| 57 if (!encoded) { |
| 58 return nullptr; |
| 59 } |
| 60 return SkImage::NewFromEncoded(encoded); |
| 61 } |
| 62 |
| 63 const ImageMakerProc gProcs[] = { |
| 64 make_raster, |
| 65 make_texture, |
| 66 make_pict_gen, |
| 67 make_encode_gen, |
| 68 }; |
| 69 |
| 70 /* |
| 71 * Exercise drawing pictures inside an image, showing that the image version is
pixelated |
| 72 * (correctly) when it is inside an image. |
| 73 */ |
| 74 class ImageShaderGM : public skiagm::GM { |
| 75 SkAutoTUnref<SkPicture> fPicture; |
| 76 |
| 77 public: |
| 78 ImageShaderGM() {} |
| 79 |
| 80 protected: |
| 81 SkString onShortName() override { |
| 82 return SkString("image-shader"); |
| 83 } |
| 84 |
| 85 SkISize onISize() override { |
| 86 return SkISize::Make(850, 450); |
| 87 } |
| 88 |
| 89 void onOnceBeforeDraw() override { |
| 90 const SkRect bounds = SkRect::MakeWH(100, 100); |
| 91 SkPictureRecorder recorder; |
| 92 draw_something(recorder.beginRecording(bounds), bounds); |
| 93 fPicture.reset(recorder.endRecording()); |
| 94 } |
| 95 |
| 96 void testImage(SkCanvas* canvas, SkImage* image) { |
| 97 SkAutoCanvasRestore acr(canvas, true); |
| 98 |
| 99 canvas->drawImage(image, 0, 0); |
| 100 canvas->translate(0, 120); |
| 101 |
| 102 const SkShader::TileMode tile = SkShader::kRepeat_TileMode; |
| 103 const SkMatrix localM = SkMatrix::MakeTrans(-50, -50); |
| 104 SkAutoTUnref<SkShader> shader(image->newShader(tile, tile, &localM)); |
| 105 SkPaint paint; |
| 106 paint.setAntiAlias(true); |
| 107 paint.setShader(shader); |
| 108 canvas->drawCircle(50, 50, 50, paint); |
| 109 } |
| 110 |
| 111 void onDraw(SkCanvas* canvas) override { |
| 112 canvas->translate(20, 20); |
| 113 |
| 114 const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); |
| 115 |
| 116 for (size_t i = 0; i < SK_ARRAY_COUNT(gProcs); ++i) { |
| 117 SkAutoTUnref<SkImage> image(gProcs[i](canvas->getGrContext(), fPictu
re, info)); |
| 118 if (image) { |
| 119 this->testImage(canvas, image); |
| 120 } |
| 121 canvas->translate(120, 0); |
| 122 } |
| 123 } |
| 124 |
| 125 private: |
| 126 typedef skiagm::GM INHERITED; |
| 127 }; |
| 128 DEF_GM( return new ImageShaderGM; ) |
| 129 |
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