reed | 499abab | 2015-08-20 12:30:20 -0700 | [diff] [blame] | 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 SkImageInfo&); |
| 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 SkImageInfo& info) { |
| 37 | if (!ctx) { |
| 38 | return nullptr; |
| 39 | } |
bsalomon | 5ec26ae | 2016-02-25 08:33:02 -0800 | [diff] [blame^] | 40 | SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkBudgeted::kNo, |
reed | 499abab | 2015-08-20 12:30:20 -0700 | [diff] [blame] | 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 SkImageInfo& info) { |
| 48 | return SkImage::NewFromPicture(pic, info.dimensions(), nullptr, nullptr); |
| 49 | } |
| 50 | |
| 51 | static SkImage* make_encode_gen(GrContext* ctx, const SkPicture* pic, const SkImageInfo& 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(), fPicture, 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 | |