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 "SkCanvas.h" 9 #include "SkPictureRecorder.h" 10 #include "SkTileGrid.h" 11 #include "Test.h" 12 13 enum Tile { 14 kTopLeft_Tile = 0x1, 15 kTopRight_Tile = 0x2, 16 kBottomLeft_Tile = 0x4, 17 kBottomRight_Tile = 0x8, 18 19 kAll_Tile = kTopLeft_Tile | kTopRight_Tile | kBottomLeft_Tile | kBottomRight_Tile, 20 }; 21 22 class MockCanvas : public SkCanvas { 23 public: 24 MockCanvas(const SkBitmap& bm) : SkCanvas(bm) {} 25 26 virtual void drawRect(const SkRect& rect, const SkPaint&) { 27 // This capture occurs before quick reject. 28 fRects.push(rect); 29 } 30 31 SkTDArray<SkRect> fRects; 32 }; 33 34 static void verifyTileHits(skiatest::Reporter* reporter, SkRect rect, 35 uint32_t tileMask, int borderPixels = 0) { 36 SkTileGridFactory::TileGridInfo info; 37 info.fMargin.set(borderPixels, borderPixels); 38 info.fOffset.setZero(); 39 info.fTileInterval.set(10 - 2 * borderPixels, 10 - 2 * borderPixels); 40 SkTileGrid grid(2, 2, info); 41 grid.insert(NULL, rect, false); 42 REPORTER_ASSERT(reporter, grid.tileCount(0, 0) == 43 ((tileMask & kTopLeft_Tile)? 1 : 0)); 44 REPORTER_ASSERT(reporter, grid.tileCount(1, 0) == 45 ((tileMask & kTopRight_Tile)? 1 : 0)); 46 REPORTER_ASSERT(reporter, grid.tileCount(0, 1) == 47 ((tileMask & kBottomLeft_Tile)? 1 : 0)); 48 REPORTER_ASSERT(reporter, grid.tileCount(1, 1) == 49 ((tileMask & kBottomRight_Tile)? 1 : 0)); 50 } 51 52 DEF_TEST(TileGrid_UnalignedQuery, reporter) { 53 // Use SkTileGridPicture to generate a SkTileGrid with a helper 54 SkTileGridFactory::TileGridInfo info; 55 info.fMargin.setEmpty(); 56 info.fOffset.setZero(); 57 info.fTileInterval.set(10, 10); 58 SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0), 59 SkIntToScalar(8), SkIntToScalar(8)); 60 SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(11), SkIntToScalar(11), 61 SkIntToScalar(1), SkIntToScalar(1)); 62 SkTileGridFactory factory(info); 63 SkPictureRecorder recorder; 64 SkCanvas* canvas = recorder.beginRecording(20, 20, &factory, 0); 65 SkPaint paint; 66 canvas->drawRect(rect1, paint); 67 canvas->drawRect(rect2, paint); 68 SkAutoTUnref<SkPicture> picture(recorder.endRecording()); 69 70 SkBitmap store; 71 store.allocN32Pixels(1, 1); 72 73 // Test parts of top-left tile 74 { 75 MockCanvas mockCanvas(store); 76 picture->playback(&mockCanvas); 77 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 78 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 79 } 80 { 81 MockCanvas mockCanvas(store); 82 mockCanvas.translate(-7.99f, -7.99f); 83 picture->playback(&mockCanvas); 84 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 85 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 86 } 87 // Corner overlap 88 { 89 MockCanvas mockCanvas(store); 90 mockCanvas.translate(-9.5f, -9.5f); 91 picture->playback(&mockCanvas); 92 REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count()); 93 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 94 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]); 95 } 96 // Intersect bottom right tile, but does not overlap rect 2 97 { 98 MockCanvas mockCanvas(store); 99 mockCanvas.translate(-16.0f, -16.0f); 100 picture->playback(&mockCanvas); 101 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 102 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]); 103 } 104 // Out of bounds queries, snap to border tiles 105 { 106 MockCanvas mockCanvas(store); 107 mockCanvas.translate(2.0f, 0.0f); 108 picture->playback(&mockCanvas); 109 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 110 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 111 } 112 { 113 MockCanvas mockCanvas(store); 114 mockCanvas.translate(0.0f, 2.0f); 115 picture->playback(&mockCanvas); 116 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 117 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 118 } 119 { 120 MockCanvas mockCanvas(store); 121 mockCanvas.translate(-22.0f, -16.0f); 122 picture->playback(&mockCanvas); 123 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 124 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]); 125 } 126 { 127 MockCanvas mockCanvas(store); 128 mockCanvas.translate(-16.0f, -22.0f); 129 picture->playback(&mockCanvas); 130 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 131 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]); 132 } 133 } 134 135 DEF_TEST(TileGrid_OverlapOffsetQueryAlignment, reporter) { 136 // Use SkTileGridPicture to generate a SkTileGrid with a helper 137 SkTileGridFactory::TileGridInfo info; 138 info.fMargin.set(1, 1); 139 info.fOffset.set(-1, -1); 140 info.fTileInterval.set(8, 8); 141 142 // rect landing entirely in top left tile 143 SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0), 144 SkIntToScalar(1), SkIntToScalar(1)); 145 // rect landing entirely in center tile 146 SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(12), SkIntToScalar(12), 147 SkIntToScalar(1), SkIntToScalar(1)); 148 // rect landing entirely in bottomright tile 149 SkRect rect3 = SkRect::MakeXYWH(SkIntToScalar(19), SkIntToScalar(19), 150 SkIntToScalar(1), SkIntToScalar(1)); 151 SkTileGridFactory factory(info); 152 SkPictureRecorder recorder; 153 SkCanvas* canvas = recorder.beginRecording(20, 20, &factory, 0); 154 SkPaint paint; 155 canvas->drawRect(rect1, paint); 156 canvas->drawRect(rect2, paint); 157 canvas->drawRect(rect3, paint); 158 SkAutoTUnref<SkPicture> picture(recorder.endRecording()); 159 160 SkBitmap tileBitmap; 161 tileBitmap.allocN32Pixels(10, 10); 162 SkBitmap moreThanATileBitmap; 163 moreThanATileBitmap.allocN32Pixels(11, 11); 164 SkBitmap tinyBitmap; 165 tinyBitmap.allocN32Pixels(2, 2); 166 // Test parts of top-left tile 167 { 168 // The offset should cancel the top and left borders of the top left tile 169 // So a look-up at interval 0-10 should be grid aligned, 170 MockCanvas mockCanvas(tileBitmap); 171 picture->playback(&mockCanvas); 172 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 173 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 174 } 175 { 176 // Encroaching border by one pixel 177 MockCanvas mockCanvas(moreThanATileBitmap); 178 picture->playback(&mockCanvas); 179 REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count()); 180 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 181 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]); 182 } 183 { 184 // Tile stride is 8 (tileWidth - 2 * border pixels 185 // so translating by 8, should make query grid-aligned 186 // with middle tile. 187 MockCanvas mockCanvas(tileBitmap); 188 mockCanvas.translate(SkIntToScalar(-8), SkIntToScalar(-8)); 189 picture->playback(&mockCanvas); 190 REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count()); 191 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]); 192 } 193 { 194 MockCanvas mockCanvas(tileBitmap); 195 mockCanvas.translate(-7.9f, -7.9f); 196 picture->playback(&mockCanvas); 197 REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count()); 198 REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]); 199 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]); 200 } 201 { 202 MockCanvas mockCanvas(tileBitmap); 203 mockCanvas.translate(-8.1f, -8.1f); 204 picture->playback(&mockCanvas); 205 REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count()); 206 REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]); 207 REPORTER_ASSERT(reporter, rect3 == mockCanvas.fRects[1]); 208 } 209 { 210 // Regression test for crbug.com/234688 211 // Once the 2x2 device region is inset by margin, it yields an empty 212 // adjusted region, sitting right on top of the tile boundary. 213 MockCanvas mockCanvas(tinyBitmap); 214 mockCanvas.translate(-8.0f, -8.0f); 215 picture->playback(&mockCanvas); 216 // This test passes by not asserting. We do not validate the rects recorded 217 // because the result is numerically unstable (floating point equality). 218 // The content of any one of the four tiles of the tilegrid would be a valid 219 // result since any bbox that covers the center point of the canvas will be 220 // recorded in all four tiles. 221 } 222 } 223 224 DEF_TEST(TileGrid, reporter) { 225 // Out of bounds 226 verifyTileHits(reporter, SkRect::MakeXYWH(30, 0, 1, 1), 0); 227 verifyTileHits(reporter, SkRect::MakeXYWH(0, 30, 1, 1), 0); 228 verifyTileHits(reporter, SkRect::MakeXYWH(-10, 0, 1, 1), 0); 229 verifyTileHits(reporter, SkRect::MakeXYWH(0, -10, 1, 1), 0); 230 231 // Dilation for AA consideration 232 verifyTileHits(reporter, SkRect::MakeXYWH(0, 0, 9, 9), kTopLeft_Tile); 233 verifyTileHits(reporter, SkRect::MakeXYWH(0, 0, 10, 10), kAll_Tile); 234 verifyTileHits(reporter, SkRect::MakeXYWH(9, 9, 1, 1), kAll_Tile); 235 verifyTileHits(reporter, SkRect::MakeXYWH(10, 10, 1, 1), kAll_Tile); 236 verifyTileHits(reporter, SkRect::MakeXYWH(11, 11, 1, 1), kBottomRight_Tile); 237 238 // BorderPixels 239 verifyTileHits(reporter, SkRect::MakeXYWH(0, 0, 6, 6), kTopLeft_Tile, 1); 240 verifyTileHits(reporter, SkRect::MakeXYWH(0, 0, 7, 7), kAll_Tile, 1); 241 verifyTileHits(reporter, SkRect::MakeXYWH(9, 9, 1, 1), kAll_Tile, 1); 242 verifyTileHits(reporter, SkRect::MakeXYWH(10, 10, 1, 1), kBottomRight_Tile, 1); 243 verifyTileHits(reporter, SkRect::MakeXYWH(17, 17, 1, 1), kBottomRight_Tile, 1); 244 245 // BBoxes that overlap tiles 246 verifyTileHits(reporter, SkRect::MakeXYWH(5, 5, 10, 1), kTopLeft_Tile | kTopRight_Tile); 247 verifyTileHits(reporter, SkRect::MakeXYWH(5, 5, 1, 10), kTopLeft_Tile | 248 kBottomLeft_Tile); 249 verifyTileHits(reporter, SkRect::MakeXYWH(5, 5, 10, 10), kAll_Tile); 250 verifyTileHits(reporter, SkRect::MakeXYWH(-10, -10, 40, 40), kAll_Tile); 251 } 252
