1 /* 2 * Copyright 2011 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 "SkBitmapDevice.h" 9 #include "SkCanvas.h" 10 #include "SkColorPriv.h" 11 #include "SkMathPriv.h" 12 #include "SkRegion.h" 13 #include "SkSurface.h" 14 #include "Test.h" 15 16 #if SK_SUPPORT_GPU 17 #include "GrContextFactory.h" 18 #include "SkGpuDevice.h" 19 #endif 20 21 static const int DEV_W = 100, DEV_H = 100; 22 static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); 23 static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1, 24 DEV_H * SK_Scalar1); 25 26 static SkPMColor getCanvasColor(int x, int y) { 27 SkASSERT(x >= 0 && x < DEV_W); 28 SkASSERT(y >= 0 && y < DEV_H); 29 30 U8CPU r = x; 31 U8CPU g = y; 32 U8CPU b = 0xc; 33 34 U8CPU a = 0xff; 35 switch ((x+y) % 5) { 36 case 0: 37 a = 0xff; 38 break; 39 case 1: 40 a = 0x80; 41 break; 42 case 2: 43 a = 0xCC; 44 break; 45 case 4: 46 a = 0x01; 47 break; 48 case 3: 49 a = 0x00; 50 break; 51 } 52 return SkPremultiplyARGBInline(a, r, g, b); 53 } 54 55 static SkPMColor getBitmapColor(int x, int y, int w) { 56 int n = y * w + x; 57 58 U8CPU b = n & 0xff; 59 U8CPU g = (n >> 8) & 0xff; 60 U8CPU r = (n >> 16) & 0xff; 61 return SkPackARGB32(0xff, r, g , b); 62 } 63 64 static SkPMColor convertToPMColor(SkColorType ct, SkAlphaType at, const uint32_t* addr, 65 bool* doUnpremul) { 66 *doUnpremul = (kUnpremul_SkAlphaType == at); 67 68 const uint8_t* c = reinterpret_cast<const uint8_t*>(addr); 69 U8CPU a,r,g,b; 70 switch (ct) { 71 case kBGRA_8888_SkColorType: 72 b = static_cast<U8CPU>(c[0]); 73 g = static_cast<U8CPU>(c[1]); 74 r = static_cast<U8CPU>(c[2]); 75 a = static_cast<U8CPU>(c[3]); 76 break; 77 case kRGBA_8888_SkColorType: 78 r = static_cast<U8CPU>(c[0]); 79 g = static_cast<U8CPU>(c[1]); 80 b = static_cast<U8CPU>(c[2]); 81 a = static_cast<U8CPU>(c[3]); 82 break; 83 default: 84 SkDEBUGFAIL("Unexpected colortype"); 85 return 0; 86 } 87 88 if (*doUnpremul) { 89 r = SkMulDiv255Ceiling(r, a); 90 g = SkMulDiv255Ceiling(g, a); 91 b = SkMulDiv255Ceiling(b, a); 92 } 93 return SkPackARGB32(a, r, g, b); 94 } 95 96 static void fillCanvas(SkCanvas* canvas) { 97 static SkBitmap bmp; 98 if (bmp.isNull()) { 99 bmp.allocN32Pixels(DEV_W, DEV_H); 100 intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels()); 101 for (int y = 0; y < DEV_H; ++y) { 102 for (int x = 0; x < DEV_W; ++x) { 103 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel()); 104 *pixel = getCanvasColor(x, y); 105 } 106 } 107 } 108 canvas->save(); 109 canvas->setMatrix(SkMatrix::I()); 110 canvas->clipRect(DEV_RECT_S, SkRegion::kReplace_Op); 111 SkPaint paint; 112 paint.setXfermodeMode(SkXfermode::kSrc_Mode); 113 canvas->drawBitmap(bmp, 0, 0, &paint); 114 canvas->restore(); 115 } 116 117 static void fillBitmap(SkBitmap* bitmap) { 118 SkASSERT(bitmap->lockPixelsAreWritable()); 119 SkAutoLockPixels alp(*bitmap); 120 int w = bitmap->width(); 121 int h = bitmap->height(); 122 intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels()); 123 for (int y = 0; y < h; ++y) { 124 for (int x = 0; x < w; ++x) { 125 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bitmap->rowBytes() + x * bitmap->bytesPerPixel()); 126 *pixel = getBitmapColor(x, y, w); 127 } 128 } 129 } 130 131 static bool checkPixel(SkPMColor a, SkPMColor b, bool didPremulConversion) { 132 if (!didPremulConversion) { 133 return a == b; 134 } 135 int32_t aA = static_cast<int32_t>(SkGetPackedA32(a)); 136 int32_t aR = static_cast<int32_t>(SkGetPackedR32(a)); 137 int32_t aG = static_cast<int32_t>(SkGetPackedG32(a)); 138 int32_t aB = SkGetPackedB32(a); 139 140 int32_t bA = static_cast<int32_t>(SkGetPackedA32(b)); 141 int32_t bR = static_cast<int32_t>(SkGetPackedR32(b)); 142 int32_t bG = static_cast<int32_t>(SkGetPackedG32(b)); 143 int32_t bB = static_cast<int32_t>(SkGetPackedB32(b)); 144 145 return aA == bA && 146 SkAbs32(aR - bR) <= 1 && 147 SkAbs32(aG - bG) <= 1 && 148 SkAbs32(aB - bB) <= 1; 149 } 150 151 // checks the bitmap contains correct pixels after the readPixels 152 // if the bitmap was prefilled with pixels it checks that these weren't 153 // overwritten in the area outside the readPixels. 154 static bool checkRead(skiatest::Reporter* reporter, 155 const SkBitmap& bitmap, 156 int x, int y, 157 bool checkCanvasPixels, 158 bool checkBitmapPixels) { 159 SkASSERT(4 == bitmap.bytesPerPixel()); 160 SkASSERT(!bitmap.isNull()); 161 SkASSERT(checkCanvasPixels || checkBitmapPixels); 162 163 const SkColorType ct = bitmap.colorType(); 164 const SkAlphaType at = bitmap.alphaType(); 165 166 int bw = bitmap.width(); 167 int bh = bitmap.height(); 168 169 SkIRect srcRect = SkIRect::MakeXYWH(x, y, bw, bh); 170 SkIRect clippedSrcRect = DEV_RECT; 171 if (!clippedSrcRect.intersect(srcRect)) { 172 clippedSrcRect.setEmpty(); 173 } 174 SkAutoLockPixels alp(bitmap); 175 for (int by = 0; by < bh; ++by) { 176 for (int bx = 0; bx < bw; ++bx) { 177 int devx = bx + srcRect.fLeft; 178 int devy = by + srcRect.fTop; 179 180 const uint32_t* pixel = bitmap.getAddr32(bx, by); 181 182 if (clippedSrcRect.contains(devx, devy)) { 183 if (checkCanvasPixels) { 184 SkPMColor canvasPixel = getCanvasColor(devx, devy); 185 bool didPremul; 186 SkPMColor pmPixel = convertToPMColor(ct, at, pixel, &didPremul); 187 bool check; 188 REPORTER_ASSERT(reporter, check = checkPixel(pmPixel, canvasPixel, didPremul)); 189 if (!check) { 190 return false; 191 } 192 } 193 } else if (checkBitmapPixels) { 194 REPORTER_ASSERT(reporter, getBitmapColor(bx, by, bw) == *pixel); 195 if (getBitmapColor(bx, by, bw) != *pixel) { 196 return false; 197 } 198 } 199 } 200 } 201 return true; 202 } 203 204 enum BitmapInit { 205 kFirstBitmapInit = 0, 206 207 kNoPixels_BitmapInit = kFirstBitmapInit, 208 kTight_BitmapInit, 209 kRowBytes_BitmapInit, 210 211 kBitmapInitCnt 212 }; 213 214 static BitmapInit nextBMI(BitmapInit bmi) { 215 int x = bmi; 216 return static_cast<BitmapInit>(++x); 217 } 218 219 static void init_bitmap(SkBitmap* bitmap, const SkIRect& rect, BitmapInit init, SkColorType ct, 220 SkAlphaType at) { 221 SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), ct, at); 222 size_t rowBytes = 0; 223 bool alloc = true; 224 switch (init) { 225 case kNoPixels_BitmapInit: 226 alloc = false; 227 case kTight_BitmapInit: 228 break; 229 case kRowBytes_BitmapInit: 230 rowBytes = (info.width() + 16) * sizeof(SkPMColor); 231 break; 232 default: 233 SkASSERT(0); 234 break; 235 } 236 237 if (alloc) { 238 bitmap->allocPixels(info); 239 } else { 240 bitmap->setInfo(info, rowBytes); 241 } 242 } 243 244 DEF_GPUTEST(ReadPixels, reporter, factory) { 245 const SkIRect testRects[] = { 246 // entire thing 247 DEV_RECT, 248 // larger on all sides 249 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10), 250 // fully contained 251 SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4), 252 // outside top left 253 SkIRect::MakeLTRB(-10, -10, -1, -1), 254 // touching top left corner 255 SkIRect::MakeLTRB(-10, -10, 0, 0), 256 // overlapping top left corner 257 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4), 258 // overlapping top left and top right corners 259 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4), 260 // touching entire top edge 261 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0), 262 // overlapping top right corner 263 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4), 264 // contained in x, overlapping top edge 265 SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4), 266 // outside top right corner 267 SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1), 268 // touching top right corner 269 SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0), 270 // overlapping top left and bottom left corners 271 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10), 272 // touching entire left edge 273 SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10), 274 // overlapping bottom left corner 275 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10), 276 // contained in y, overlapping left edge 277 SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4), 278 // outside bottom left corner 279 SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10), 280 // touching bottom left corner 281 SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10), 282 // overlapping bottom left and bottom right corners 283 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), 284 // touching entire left edge 285 SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10), 286 // overlapping bottom right corner 287 SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), 288 // overlapping top right and bottom right corners 289 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10), 290 }; 291 292 for (int dtype = 0; dtype < 3; ++dtype) { 293 int glCtxTypeCnt = 1; 294 #if SK_SUPPORT_GPU 295 if (0 != dtype) { 296 glCtxTypeCnt = GrContextFactory::kGLContextTypeCnt; 297 } 298 #endif 299 const SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H); 300 for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) { 301 SkAutoTUnref<SkSurface> surface; 302 if (0 == dtype) { 303 surface.reset(SkSurface::NewRaster(info)); 304 } else { 305 #if SK_SUPPORT_GPU 306 GrContextFactory::GLContextType type = 307 static_cast<GrContextFactory::GLContextType>(glCtxType); 308 if (!GrContextFactory::IsRenderingGLContext(type)) { 309 continue; 310 } 311 GrContext* context = factory->get(type); 312 if (NULL == context) { 313 continue; 314 } 315 GrTextureDesc desc; 316 desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit; 317 desc.fWidth = DEV_W; 318 desc.fHeight = DEV_H; 319 desc.fConfig = kSkia8888_GrPixelConfig; 320 desc.fOrigin = 1 == dtype ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin; 321 GrAutoScratchTexture ast(context, desc, GrContext::kExact_ScratchTexMatch); 322 SkAutoTUnref<GrTexture> tex(ast.detach()); 323 surface.reset(SkSurface::NewRenderTargetDirect(tex->asRenderTarget())); 324 #else 325 continue; 326 #endif 327 } 328 SkCanvas& canvas = *surface->getCanvas(); 329 fillCanvas(&canvas); 330 331 static const struct { 332 SkColorType fColorType; 333 SkAlphaType fAlphaType; 334 } gReadConfigs[] = { 335 { kRGBA_8888_SkColorType, kPremul_SkAlphaType }, 336 { kRGBA_8888_SkColorType, kUnpremul_SkAlphaType }, 337 { kBGRA_8888_SkColorType, kPremul_SkAlphaType }, 338 { kBGRA_8888_SkColorType, kUnpremul_SkAlphaType }, 339 }; 340 for (size_t rect = 0; rect < SK_ARRAY_COUNT(testRects); ++rect) { 341 const SkIRect& srcRect = testRects[rect]; 342 for (BitmapInit bmi = kFirstBitmapInit; bmi < kBitmapInitCnt; bmi = nextBMI(bmi)) { 343 for (size_t c = 0; c < SK_ARRAY_COUNT(gReadConfigs); ++c) { 344 SkBitmap bmp; 345 init_bitmap(&bmp, srcRect, bmi, 346 gReadConfigs[c].fColorType, gReadConfigs[c].fAlphaType); 347 348 // if the bitmap has pixels allocated before the readPixels, 349 // note that and fill them with pattern 350 bool startsWithPixels = !bmp.isNull(); 351 if (startsWithPixels) { 352 fillBitmap(&bmp); 353 } 354 uint32_t idBefore = surface->generationID(); 355 bool success = canvas.readPixels(&bmp, srcRect.fLeft, srcRect.fTop); 356 uint32_t idAfter = surface->generationID(); 357 358 // we expect to succeed when the read isn't fully clipped 359 // out. 360 bool expectSuccess = SkIRect::Intersects(srcRect, DEV_RECT); 361 // determine whether we expected the read to succeed. 362 REPORTER_ASSERT(reporter, success == expectSuccess); 363 // read pixels should never change the gen id 364 REPORTER_ASSERT(reporter, idBefore == idAfter); 365 366 if (success || startsWithPixels) { 367 checkRead(reporter, bmp, srcRect.fLeft, srcRect.fTop, 368 success, startsWithPixels); 369 } else { 370 // if we had no pixels beforehand and the readPixels 371 // failed then our bitmap should still not have pixels 372 REPORTER_ASSERT(reporter, bmp.isNull()); 373 } 374 } 375 // check the old webkit version of readPixels that clips the 376 // bitmap size 377 SkBitmap wkbmp; 378 bool success = canvas.readPixels(srcRect, &wkbmp); 379 SkIRect clippedRect = DEV_RECT; 380 if (clippedRect.intersect(srcRect)) { 381 REPORTER_ASSERT(reporter, success); 382 REPORTER_ASSERT(reporter, kN32_SkColorType == wkbmp.colorType()); 383 REPORTER_ASSERT(reporter, kPremul_SkAlphaType == wkbmp.alphaType()); 384 checkRead(reporter, wkbmp, clippedRect.fLeft, 385 clippedRect.fTop, true, false); 386 } else { 387 REPORTER_ASSERT(reporter, !success); 388 } 389 } 390 } 391 } 392 } 393 } 394
