1 /* 2 * Copyright 2014 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 10 #include "SkPaint.h" 11 #include "SkPicture.h" 12 #include "SkPictureRecorder.h" 13 #include "SkShader.h" 14 15 constexpr SkScalar kPictureSize = SK_Scalar1; 16 constexpr SkScalar kFillSize = 100; 17 constexpr unsigned kRowSize = 6; 18 19 constexpr struct { 20 SkScalar x, y, w, h; 21 SkScalar offsetX, offsetY; 22 } tiles[] = { 23 { 0, 0, 1, 1, 0, 0 }, 24 { -0.5f, -0.5f, 1, 1, 0, 0 }, 25 { 0.5f, 0.5f, 1, 1, 0, 0 }, 26 27 { 0, 0, 1.5f, 1.5f, 0, 0 }, 28 { -0.5f, -0.5f, 1.5f, 1.5f, 0, 0 }, 29 { 0.5f, 0.5f, 1.5f, 1.5f, 0, 0 }, 30 31 { 0, 0, 0.5f, 0.5f, 0, 0 }, 32 { 0.25f, 0.25f, 0.5f, 0.5f, 0, 0 }, 33 { -0.25f, -0.25f, 0.5f, 0.5f, 0, 0 }, 34 35 { 0, 0, 1, 1, 0.5f, 0.5f }, 36 { -0.5f, -0.5f, 1, 1, 0.5f, 0.5f }, 37 { 0.5f, 0.5f, 1, 1, 0.5f, 0.5f }, 38 39 { 0, 0, 1.5f, 1.5f, 0.5f, 0.5f }, 40 { -0.5f, -0.5f, 1.5f, 1.5f, 0.5f, 0.5f }, 41 { 0.5f, 0.5f, 1.5f, 1.5f, 0.5f, 0.5f }, 42 43 { 0, 0, 1.5f, 1, 0, 0 }, 44 { -0.5f, -0.5f, 1.5f, 1, 0, 0 }, 45 { 0.5f, 0.5f, 1.5f, 1, 0, 0 }, 46 47 { 0, 0, 0.5f, 1, 0, 0 }, 48 { 0.25f, 0.25f, 0.5f, 1, 0, 0 }, 49 { -0.25f, -0.25f, 0.5f, 1, 0, 0 }, 50 51 { 0, 0, 1, 1.5f, 0, 0 }, 52 { -0.5f, -0.5f, 1, 1.5f, 0, 0 }, 53 { 0.5f, 0.5f, 1, 1.5f, 0, 0 }, 54 55 { 0, 0, 1, 0.5f, 0, 0 }, 56 { 0.25f, 0.25f, 1, 0.5f, 0, 0 }, 57 { -0.25f, -0.25f, 1, 0.5f, 0, 0 }, 58 }; 59 60 static void draw_scene(SkCanvas* canvas, SkScalar pictureSize) { 61 canvas->clear(SK_ColorWHITE); 62 63 SkPaint paint; 64 paint.setColor(SK_ColorGREEN); 65 paint.setStyle(SkPaint::kFill_Style); 66 paint.setAntiAlias(true); 67 68 canvas->drawCircle(pictureSize / 4, pictureSize / 4, pictureSize / 4, paint); 69 canvas->drawRect(SkRect::MakeXYWH(pictureSize / 2, pictureSize / 2, 70 pictureSize / 2, pictureSize / 2), paint); 71 72 paint.setColor(SK_ColorRED); 73 canvas->drawLine(pictureSize / 2, pictureSize * 1 / 3, 74 pictureSize / 2, pictureSize * 2 / 3, paint); 75 canvas->drawLine(pictureSize * 1 / 3, pictureSize / 2, 76 pictureSize * 2 / 3, pictureSize / 2, paint); 77 78 paint.setColor(SK_ColorBLACK); 79 paint.setStyle(SkPaint::kStroke_Style); 80 canvas->drawRect(SkRect::MakeWH(pictureSize, pictureSize), paint); 81 } 82 83 class PictureShaderTileGM : public skiagm::GM { 84 protected: 85 86 SkString onShortName() override { 87 return SkString("pictureshadertile"); 88 } 89 90 SkISize onISize() override { 91 return SkISize::Make(800, 600); 92 } 93 94 void onOnceBeforeDraw() override { 95 SkPictureRecorder recorder; 96 SkCanvas* pictureCanvas = recorder.beginRecording(kPictureSize, kPictureSize); 97 draw_scene(pictureCanvas, kPictureSize); 98 sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture()); 99 100 SkPoint offset = SkPoint::Make(100, 100); 101 pictureCanvas = recorder.beginRecording(SkRect::MakeXYWH(offset.x(), offset.y(), 102 kPictureSize, kPictureSize)); 103 pictureCanvas->translate(offset.x(), offset.y()); 104 draw_scene(pictureCanvas, kPictureSize); 105 sk_sp<SkPicture> offsetPicture(recorder.finishRecordingAsPicture()); 106 107 for (unsigned i = 0; i < SK_ARRAY_COUNT(tiles); ++i) { 108 SkRect tile = SkRect::MakeXYWH(tiles[i].x * kPictureSize, 109 tiles[i].y * kPictureSize, 110 tiles[i].w * kPictureSize, 111 tiles[i].h * kPictureSize); 112 SkMatrix localMatrix; 113 localMatrix.setTranslate(tiles[i].offsetX * kPictureSize, 114 tiles[i].offsetY * kPictureSize); 115 localMatrix.postScale(kFillSize / (2 * kPictureSize), 116 kFillSize / (2 * kPictureSize)); 117 118 sk_sp<SkPicture> pictureRef = picture; 119 SkRect* tilePtr = &tile; 120 121 if (tile == SkRect::MakeWH(kPictureSize, kPictureSize)) { 122 // When the tile == picture bounds, exercise the picture + offset path. 123 pictureRef = offsetPicture; 124 tilePtr = nullptr; 125 } 126 127 fShaders[i] = SkShader::MakePictureShader(pictureRef, SkShader::kRepeat_TileMode, 128 SkShader::kRepeat_TileMode, &localMatrix, 129 tilePtr); 130 } 131 } 132 133 void onDraw(SkCanvas* canvas) override { 134 canvas->clear(SK_ColorBLACK); 135 136 SkPaint paint; 137 paint.setStyle(SkPaint::kFill_Style); 138 139 for (unsigned i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) { 140 paint.setShader(fShaders[i]); 141 142 canvas->save(); 143 canvas->translate((i % kRowSize) * kFillSize * 1.1f, 144 (i / kRowSize) * kFillSize * 1.1f); 145 canvas->drawRect(SkRect::MakeWH(kFillSize, kFillSize), paint); 146 canvas->restore(); 147 } 148 } 149 150 private: 151 sk_sp<SkShader> fShaders[SK_ARRAY_COUNT(tiles)]; 152 153 typedef GM INHERITED; 154 }; 155 156 DEF_GM(return new PictureShaderTileGM;) 157
