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 <initializer_list> 9 #include "SkCanvas.h" 10 #include "SkColorData.h" 11 #include "SkHalf.h" 12 #include "SkImageInfoPriv.h" 13 #include "SkMathPriv.h" 14 #include "SkSurface.h" 15 #include "Test.h" 16 17 #include "GrContext.h" 18 #include "GrContextFactory.h" 19 #include "GrContextPriv.h" 20 #include "GrProxyProvider.h" 21 #include "ProxyUtils.h" 22 #include "SkGr.h" 23 24 25 static const int DEV_W = 100, DEV_H = 100; 26 static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); 27 static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1, 28 DEV_H * SK_Scalar1); 29 30 static SkPMColor get_src_color(int x, int y) { 31 SkASSERT(x >= 0 && x < DEV_W); 32 SkASSERT(y >= 0 && y < DEV_H); 33 34 U8CPU r = x; 35 U8CPU g = y; 36 U8CPU b = 0xc; 37 38 U8CPU a = 0xff; 39 switch ((x+y) % 5) { 40 case 0: 41 a = 0xff; 42 break; 43 case 1: 44 a = 0x80; 45 break; 46 case 2: 47 a = 0xCC; 48 break; 49 case 4: 50 a = 0x01; 51 break; 52 case 3: 53 a = 0x00; 54 break; 55 } 56 return SkPremultiplyARGBInline(a, r, g, b); 57 } 58 59 static SkPMColor get_dst_bmp_init_color(int x, int y, int w) { 60 int n = y * w + x; 61 62 U8CPU b = n & 0xff; 63 U8CPU g = (n >> 8) & 0xff; 64 U8CPU r = (n >> 16) & 0xff; 65 return SkPackARGB32(0xff, r, g , b); 66 } 67 68 // TODO: Make this consider both ATs 69 static SkPMColor convert_to_pmcolor(SkColorType ct, SkAlphaType at, const uint32_t* addr, 70 bool* doUnpremul) { 71 *doUnpremul = (kUnpremul_SkAlphaType == at); 72 73 const uint8_t* c = reinterpret_cast<const uint8_t*>(addr); 74 U8CPU a,r,g,b; 75 switch (ct) { 76 case kBGRA_8888_SkColorType: 77 b = static_cast<U8CPU>(c[0]); 78 g = static_cast<U8CPU>(c[1]); 79 r = static_cast<U8CPU>(c[2]); 80 a = static_cast<U8CPU>(c[3]); 81 break; 82 case kRGB_888x_SkColorType: // fallthrough 83 case kRGBA_8888_SkColorType: 84 r = static_cast<U8CPU>(c[0]); 85 g = static_cast<U8CPU>(c[1]); 86 b = static_cast<U8CPU>(c[2]); 87 // We set this even when for kRGB_888x because our caller will validate that it is 0xff. 88 a = static_cast<U8CPU>(c[3]); 89 break; 90 default: 91 SkDEBUGFAIL("Unexpected colortype"); 92 return 0; 93 } 94 95 if (*doUnpremul) { 96 r = SkMulDiv255Ceiling(r, a); 97 g = SkMulDiv255Ceiling(g, a); 98 b = SkMulDiv255Ceiling(b, a); 99 } 100 return SkPackARGB32(a, r, g, b); 101 } 102 103 static SkBitmap make_src_bitmap() { 104 static SkBitmap bmp; 105 if (bmp.isNull()) { 106 bmp.allocN32Pixels(DEV_W, DEV_H); 107 intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels()); 108 for (int y = 0; y < DEV_H; ++y) { 109 for (int x = 0; x < DEV_W; ++x) { 110 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel()); 111 *pixel = get_src_color(x, y); 112 } 113 } 114 } 115 return bmp; 116 } 117 118 static void fill_src_canvas(SkCanvas* canvas) { 119 canvas->save(); 120 canvas->setMatrix(SkMatrix::I()); 121 canvas->clipRect(DEV_RECT_S, kReplace_SkClipOp); 122 SkPaint paint; 123 paint.setBlendMode(SkBlendMode::kSrc); 124 canvas->drawBitmap(make_src_bitmap(), 0, 0, &paint); 125 canvas->restore(); 126 } 127 128 static void fill_dst_bmp_with_init_data(SkBitmap* bitmap) { 129 int w = bitmap->width(); 130 int h = bitmap->height(); 131 intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels()); 132 for (int y = 0; y < h; ++y) { 133 for (int x = 0; x < w; ++x) { 134 SkPMColor initColor = get_dst_bmp_init_color(x, y, w); 135 if (kAlpha_8_SkColorType == bitmap->colorType()) { 136 uint8_t* alpha = reinterpret_cast<uint8_t*>(pixels + y * bitmap->rowBytes() + x); 137 *alpha = SkGetPackedA32(initColor); 138 } else { 139 SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bitmap->rowBytes() + x * bitmap->bytesPerPixel()); 140 *pixel = initColor; 141 } 142 } 143 } 144 } 145 146 static bool check_read_pixel(SkPMColor a, SkPMColor b, bool didPremulConversion) { 147 if (!didPremulConversion) { 148 return a == b; 149 } 150 int32_t aA = static_cast<int32_t>(SkGetPackedA32(a)); 151 int32_t aR = static_cast<int32_t>(SkGetPackedR32(a)); 152 int32_t aG = static_cast<int32_t>(SkGetPackedG32(a)); 153 int32_t aB = SkGetPackedB32(a); 154 155 int32_t bA = static_cast<int32_t>(SkGetPackedA32(b)); 156 int32_t bR = static_cast<int32_t>(SkGetPackedR32(b)); 157 int32_t bG = static_cast<int32_t>(SkGetPackedG32(b)); 158 int32_t bB = static_cast<int32_t>(SkGetPackedB32(b)); 159 160 return aA == bA && 161 SkAbs32(aR - bR) <= 1 && 162 SkAbs32(aG - bG) <= 1 && 163 SkAbs32(aB - bB) <= 1; 164 } 165 166 // checks the bitmap contains correct pixels after the readPixels 167 // if the bitmap was prefilled with pixels it checks that these weren't 168 // overwritten in the area outside the readPixels. 169 static bool check_read(skiatest::Reporter* reporter, const SkBitmap& bitmap, int x, int y, 170 bool checkSurfacePixels, bool checkBitmapPixels, 171 SkImageInfo surfaceInfo) { 172 SkAlphaType bmpAT = bitmap.alphaType(); 173 SkColorType bmpCT = bitmap.colorType(); 174 SkASSERT(!bitmap.isNull()); 175 SkASSERT(checkSurfacePixels || checkBitmapPixels); 176 177 int bw = bitmap.width(); 178 int bh = bitmap.height(); 179 180 SkIRect srcRect = SkIRect::MakeXYWH(x, y, bw, bh); 181 SkIRect clippedSrcRect = DEV_RECT; 182 if (!clippedSrcRect.intersect(srcRect)) { 183 clippedSrcRect.setEmpty(); 184 } 185 if (kAlpha_8_SkColorType == bmpCT) { 186 for (int by = 0; by < bh; ++by) { 187 for (int bx = 0; bx < bw; ++bx) { 188 int devx = bx + srcRect.fLeft; 189 int devy = by + srcRect.fTop; 190 const uint8_t* alpha = bitmap.getAddr8(bx, by); 191 192 if (clippedSrcRect.contains(devx, devy)) { 193 if (checkSurfacePixels) { 194 uint8_t surfaceAlpha = (surfaceInfo.alphaType() == kOpaque_SkAlphaType) 195 ? 0xFF 196 : SkGetPackedA32(get_src_color(devx, devy)); 197 if (surfaceAlpha != *alpha) { 198 ERRORF(reporter, 199 "Expected readback alpha (%d, %d) value 0x%02x, got 0x%02x. ", 200 bx, by, surfaceAlpha, *alpha); 201 return false; 202 } 203 } 204 } else if (checkBitmapPixels) { 205 uint32_t origDstAlpha = SkGetPackedA32(get_dst_bmp_init_color(bx, by, bw)); 206 if (origDstAlpha != *alpha) { 207 ERRORF(reporter, "Expected clipped out area of readback to be unchanged. " 208 "Expected 0x%02x, got 0x%02x", origDstAlpha, *alpha); 209 return false; 210 } 211 } 212 } 213 } 214 return true; 215 } 216 for (int by = 0; by < bh; ++by) { 217 for (int bx = 0; bx < bw; ++bx) { 218 int devx = bx + srcRect.fLeft; 219 int devy = by + srcRect.fTop; 220 221 const uint32_t* pixel = bitmap.getAddr32(bx, by); 222 223 if (clippedSrcRect.contains(devx, devy)) { 224 if (checkSurfacePixels) { 225 SkPMColor surfacePMColor = get_src_color(devx, devy); 226 if (SkColorTypeIsAlphaOnly(surfaceInfo.colorType())) { 227 surfacePMColor &= 0xFF000000; 228 } 229 if (kOpaque_SkAlphaType == surfaceInfo.alphaType() || kOpaque_SkAlphaType == bmpAT) { 230 surfacePMColor |= 0xFF000000; 231 } 232 bool didPremul; 233 SkPMColor pmPixel = convert_to_pmcolor(bmpCT, bmpAT, pixel, &didPremul); 234 if (!check_read_pixel(pmPixel, surfacePMColor, didPremul)) { 235 ERRORF(reporter, 236 "Expected readback pixel (%d, %d) value 0x%08x, got 0x%08x. " 237 "Readback was unpremul: %d", 238 bx, by, surfacePMColor, pmPixel, didPremul); 239 return false; 240 } 241 } 242 } else if (checkBitmapPixels) { 243 uint32_t origDstPixel = get_dst_bmp_init_color(bx, by, bw); 244 if (origDstPixel != *pixel) { 245 ERRORF(reporter, "Expected clipped out area of readback to be unchanged. " 246 "Expected 0x%08x, got 0x%08x", origDstPixel, *pixel); 247 return false; 248 } 249 } 250 } 251 } 252 return true; 253 } 254 255 enum BitmapInit { 256 kFirstBitmapInit = 0, 257 258 kTight_BitmapInit = kFirstBitmapInit, 259 kRowBytes_BitmapInit, 260 kRowBytesOdd_BitmapInit, 261 262 kLastAligned_BitmapInit = kRowBytes_BitmapInit, 263 264 #if 0 // THIS CAUSES ERRORS ON WINDOWS AND SOME ANDROID DEVICES 265 kLast_BitmapInit = kRowBytesOdd_BitmapInit 266 #else 267 kLast_BitmapInit = kLastAligned_BitmapInit 268 #endif 269 }; 270 271 static BitmapInit nextBMI(BitmapInit bmi) { 272 int x = bmi; 273 return static_cast<BitmapInit>(++x); 274 } 275 276 static void init_bitmap(SkBitmap* bitmap, const SkIRect& rect, BitmapInit init, SkColorType ct, 277 SkAlphaType at) { 278 SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), ct, at); 279 size_t rowBytes = 0; 280 switch (init) { 281 case kTight_BitmapInit: 282 break; 283 case kRowBytes_BitmapInit: 284 rowBytes = SkAlign4((info.width() + 16) * info.bytesPerPixel()); 285 break; 286 case kRowBytesOdd_BitmapInit: 287 rowBytes = SkAlign4(info.width() * info.bytesPerPixel()) + 3; 288 break; 289 default: 290 SkASSERT(0); 291 break; 292 } 293 bitmap->allocPixels(info, rowBytes); 294 } 295 296 static const struct { 297 SkColorType fColorType; 298 SkAlphaType fAlphaType; 299 } gReadPixelsConfigs[] = { 300 {kRGBA_8888_SkColorType, kPremul_SkAlphaType}, 301 {kRGBA_8888_SkColorType, kUnpremul_SkAlphaType}, 302 {kRGB_888x_SkColorType, kOpaque_SkAlphaType}, 303 {kBGRA_8888_SkColorType, kPremul_SkAlphaType}, 304 {kBGRA_8888_SkColorType, kUnpremul_SkAlphaType}, 305 {kAlpha_8_SkColorType, kPremul_SkAlphaType}, 306 }; 307 const SkIRect gReadPixelsTestRects[] = { 308 // entire thing 309 DEV_RECT, 310 // larger on all sides 311 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10), 312 // fully contained 313 SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4), 314 // outside top left 315 SkIRect::MakeLTRB(-10, -10, -1, -1), 316 // touching top left corner 317 SkIRect::MakeLTRB(-10, -10, 0, 0), 318 // overlapping top left corner 319 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4), 320 // overlapping top left and top right corners 321 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4), 322 // touching entire top edge 323 SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0), 324 // overlapping top right corner 325 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4), 326 // contained in x, overlapping top edge 327 SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4), 328 // outside top right corner 329 SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1), 330 // touching top right corner 331 SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0), 332 // overlapping top left and bottom left corners 333 SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10), 334 // touching entire left edge 335 SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10), 336 // overlapping bottom left corner 337 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10), 338 // contained in y, overlapping left edge 339 SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4), 340 // outside bottom left corner 341 SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10), 342 // touching bottom left corner 343 SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10), 344 // overlapping bottom left and bottom right corners 345 SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), 346 // touching entire left edge 347 SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10), 348 // overlapping bottom right corner 349 SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), 350 // overlapping top right and bottom right corners 351 SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10), 352 }; 353 354 enum class ReadSuccessExpectation { 355 kNo, 356 kMaybe, 357 kYes, 358 }; 359 360 bool check_success_expectation(ReadSuccessExpectation expectation, bool actualSuccess) { 361 switch (expectation) { 362 case ReadSuccessExpectation::kMaybe: 363 return true; 364 case ReadSuccessExpectation::kNo: 365 return !actualSuccess; 366 case ReadSuccessExpectation::kYes: 367 return actualSuccess; 368 } 369 return false; 370 } 371 372 ReadSuccessExpectation read_should_succeed(const SkIRect& srcRect, const SkImageInfo& dstInfo, 373 const SkImageInfo& srcInfo, bool isGPU) { 374 if (!SkIRect::Intersects(srcRect, DEV_RECT)) { 375 return ReadSuccessExpectation::kNo; 376 } 377 if (!SkImageInfoValidConversion(dstInfo, srcInfo)) { 378 return ReadSuccessExpectation::kNo; 379 } 380 if (!isGPU) { 381 return ReadSuccessExpectation::kYes; 382 } 383 // This serves more as documentation of what currently works on the GPU rather than desired 384 // expectations. Once we make GrSurfaceContext color/alpha type aware and clean up some read 385 // pixels code we will make more scenarios work. 386 387 // The GPU code current only does the premul->unpremul conversion, not the reverse. 388 if (srcInfo.alphaType() == kUnpremul_SkAlphaType && 389 dstInfo.alphaType() == kPremul_SkAlphaType) { 390 return ReadSuccessExpectation::kNo; 391 } 392 // We don't currently require reading alpha-only surfaces to succeed because of some pessimistic 393 // caps decisions and alpha/red complexity in GL. 394 if (SkColorTypeIsAlphaOnly(srcInfo.colorType())) { 395 return ReadSuccessExpectation::kMaybe; 396 } 397 return ReadSuccessExpectation::kYes; 398 } 399 400 static void test_readpixels(skiatest::Reporter* reporter, const sk_sp<SkSurface>& surface, 401 const SkImageInfo& surfaceInfo, BitmapInit lastBitmapInit) { 402 SkCanvas* canvas = surface->getCanvas(); 403 fill_src_canvas(canvas); 404 for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) { 405 const SkIRect& srcRect = gReadPixelsTestRects[rect]; 406 for (BitmapInit bmi = kFirstBitmapInit; bmi <= lastBitmapInit; bmi = nextBMI(bmi)) { 407 for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) { 408 SkBitmap bmp; 409 init_bitmap(&bmp, srcRect, bmi, 410 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); 411 412 // if the bitmap has pixels allocated before the readPixels, 413 // note that and fill them with pattern 414 bool startsWithPixels = !bmp.isNull(); 415 if (startsWithPixels) { 416 fill_dst_bmp_with_init_data(&bmp); 417 } 418 uint32_t idBefore = surface->generationID(); 419 bool success = surface->readPixels(bmp, srcRect.fLeft, srcRect.fTop); 420 uint32_t idAfter = surface->generationID(); 421 422 // we expect to succeed when the read isn't fully clipped out and the infos are 423 // compatible. 424 bool isGPU = SkToBool(surface->getCanvas()->getGrContext()); 425 auto expectSuccess = read_should_succeed(srcRect, bmp.info(), surfaceInfo, isGPU); 426 // determine whether we expected the read to succeed. 427 REPORTER_ASSERT(reporter, check_success_expectation(expectSuccess, success), 428 "Read succeed=%d unexpectedly, src ct/at: %d/%d, dst ct/at: %d/%d", 429 success, surfaceInfo.colorType(), surfaceInfo.alphaType(), 430 bmp.info().colorType(), bmp.info().alphaType()); 431 // read pixels should never change the gen id 432 REPORTER_ASSERT(reporter, idBefore == idAfter); 433 434 if (success || startsWithPixels) { 435 check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop, success, 436 startsWithPixels, surfaceInfo); 437 } else { 438 // if we had no pixels beforehand and the readPixels 439 // failed then our bitmap should still not have pixels 440 REPORTER_ASSERT(reporter, bmp.isNull()); 441 } 442 } 443 } 444 } 445 } 446 447 DEF_TEST(ReadPixels, reporter) { 448 const SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H); 449 auto surface(SkSurface::MakeRaster(info)); 450 // SW readback fails a premul check when reading back to an unaligned rowbytes. 451 test_readpixels(reporter, surface, info, kLastAligned_BitmapInit); 452 } 453 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Gpu, reporter, ctxInfo) { 454 if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType || 455 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_GL_ES2_ContextType || 456 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) { 457 // skbug.com/6742 ReadPixels_Texture & _Gpu don't work with ANGLE ES2 configs 458 return; 459 } 460 461 static const SkImageInfo kImageInfos[] = { 462 SkImageInfo::Make(DEV_W, DEV_H, kRGBA_8888_SkColorType, kPremul_SkAlphaType), 463 SkImageInfo::Make(DEV_W, DEV_H, kBGRA_8888_SkColorType, kPremul_SkAlphaType), 464 SkImageInfo::Make(DEV_W, DEV_H, kRGB_888x_SkColorType, kOpaque_SkAlphaType), 465 SkImageInfo::Make(DEV_W, DEV_H, kAlpha_8_SkColorType, kPremul_SkAlphaType), 466 }; 467 for (const auto& ii : kImageInfos) { 468 for (auto& origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) { 469 sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget( 470 ctxInfo.grContext(), SkBudgeted::kNo, ii, 0, origin, nullptr)); 471 if (!surface) { 472 continue; 473 } 474 test_readpixels(reporter, surface, ii, kLast_BitmapInit); 475 } 476 } 477 } 478 479 static void test_readpixels_texture(skiatest::Reporter* reporter, 480 sk_sp<GrSurfaceContext> sContext, 481 const SkImageInfo& surfaceInfo) { 482 for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) { 483 const SkIRect& srcRect = gReadPixelsTestRects[rect]; 484 for (BitmapInit bmi = kFirstBitmapInit; bmi <= kLast_BitmapInit; bmi = nextBMI(bmi)) { 485 for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) { 486 SkBitmap bmp; 487 init_bitmap(&bmp, srcRect, bmi, 488 gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); 489 490 // if the bitmap has pixels allocated before the readPixels, 491 // note that and fill them with pattern 492 bool startsWithPixels = !bmp.isNull(); 493 // Try doing the read directly from a non-renderable texture 494 if (startsWithPixels) { 495 fill_dst_bmp_with_init_data(&bmp); 496 uint32_t flags = 0; 497 // TODO: These two hacks can go away when the surface context knows the alpha 498 // type. 499 // Tell the read to perform an unpremul step since it doesn't know alpha type. 500 if (gReadPixelsConfigs[c].fAlphaType == kUnpremul_SkAlphaType) { 501 flags = GrContextPriv::kUnpremul_PixelOpsFlag; 502 } 503 // The surface context doesn't know that the src is opaque. We don't support 504 // converting non-opaque data to opaque during a read. 505 if (bmp.alphaType() == kOpaque_SkAlphaType && 506 surfaceInfo.alphaType() != kOpaque_SkAlphaType) { 507 continue; 508 } 509 bool success = sContext->readPixels(bmp.info(), bmp.getPixels(), 510 bmp.rowBytes(), 511 srcRect.fLeft, srcRect.fTop, flags); 512 auto expectSuccess = 513 read_should_succeed(srcRect, bmp.info(), surfaceInfo, true); 514 REPORTER_ASSERT( 515 reporter, check_success_expectation(expectSuccess, success), 516 "Read succeed=%d unexpectedly, src ct/at: %d/%d, dst ct/at: %d/%d", 517 success, surfaceInfo.colorType(), surfaceInfo.alphaType(), 518 bmp.info().colorType(), bmp.info().alphaType()); 519 if (success) { 520 check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop, success, true, 521 surfaceInfo); 522 } 523 } 524 } 525 } 526 } 527 } 528 529 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Texture, reporter, ctxInfo) { 530 if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType || 531 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_GL_ES2_ContextType || 532 ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) { 533 // skbug.com/6742 ReadPixels_Texture & _Gpu don't work with ANGLE ES2 configs 534 return; 535 } 536 537 GrContext* context = ctxInfo.grContext(); 538 SkBitmap bmp = make_src_bitmap(); 539 540 // On the GPU we will also try reading back from a non-renderable texture. 541 for (auto origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) { 542 for (auto isRT : {false, true}) { 543 sk_sp<GrTextureProxy> proxy = sk_gpu_test::MakeTextureProxyFromData( 544 context, isRT, DEV_W, DEV_H, bmp.colorType(), origin, bmp.getPixels(), 545 bmp.rowBytes()); 546 sk_sp<GrSurfaceContext> sContext = context->priv().makeWrappedSurfaceContext( 547 std::move(proxy)); 548 auto info = SkImageInfo::Make(DEV_W, DEV_H, kN32_SkColorType, kPremul_SkAlphaType); 549 test_readpixels_texture(reporter, std::move(sContext), info); 550 } 551 } 552 } 553 554 /////////////////////////////////////////////////////////////////////////////////////////////////// 555 556 static const uint32_t kNumPixels = 5; 557 558 // The five reference pixels are: red, green, blue, white, black. 559 // Five is an interesting number to test because we'll exercise a full 4-wide SIMD vector 560 // plus a tail pixel. 561 static const uint32_t rgba[kNumPixels] = { 562 0xFF0000FF, 0xFF00FF00, 0xFFFF0000, 0xFFFFFFFF, 0xFF000000 563 }; 564 static const uint32_t bgra[kNumPixels] = { 565 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFFFFFFFF, 0xFF000000 566 }; 567 static const uint16_t rgb565[kNumPixels] = { 568 SK_R16_MASK_IN_PLACE, SK_G16_MASK_IN_PLACE, SK_B16_MASK_IN_PLACE, 0xFFFF, 0x0 569 }; 570 571 static const uint16_t rgba4444[kNumPixels] = { 0xF00F, 0x0F0F, 0x00FF, 0xFFFF, 0x000F }; 572 573 static const uint64_t kRed = (uint64_t) SK_Half1 << 0; 574 static const uint64_t kGreen = (uint64_t) SK_Half1 << 16; 575 static const uint64_t kBlue = (uint64_t) SK_Half1 << 32; 576 static const uint64_t kAlpha = (uint64_t) SK_Half1 << 48; 577 static const uint64_t f16[kNumPixels] = { 578 kAlpha | kRed, kAlpha | kGreen, kAlpha | kBlue, kAlpha | kBlue | kGreen | kRed, kAlpha 579 }; 580 581 static const uint8_t alpha8[kNumPixels] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 582 static const uint8_t gray8[kNumPixels] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 583 584 static const void* five_reference_pixels(SkColorType colorType) { 585 switch (colorType) { 586 case kUnknown_SkColorType: 587 return nullptr; 588 case kAlpha_8_SkColorType: 589 return alpha8; 590 case kRGB_565_SkColorType: 591 return rgb565; 592 case kARGB_4444_SkColorType: 593 return rgba4444; 594 case kRGBA_8888_SkColorType: 595 return rgba; 596 case kBGRA_8888_SkColorType: 597 return bgra; 598 case kGray_8_SkColorType: 599 return gray8; 600 case kRGBA_F16_SkColorType: 601 return f16; 602 default: 603 return nullptr; 604 } 605 606 SkASSERT(false); 607 return nullptr; 608 } 609 610 static void test_conversion(skiatest::Reporter* r, const SkImageInfo& dstInfo, 611 const SkImageInfo& srcInfo) { 612 if (!SkImageInfoIsValid(srcInfo)) { 613 return; 614 } 615 616 const void* srcPixels = five_reference_pixels(srcInfo.colorType()); 617 SkPixmap srcPixmap(srcInfo, srcPixels, srcInfo.minRowBytes()); 618 sk_sp<SkImage> src = SkImage::MakeFromRaster(srcPixmap, nullptr, nullptr); 619 REPORTER_ASSERT(r, src); 620 621 // Enough space for 5 pixels when color type is F16, more than enough space in other cases. 622 uint64_t dstPixels[kNumPixels]; 623 SkPixmap dstPixmap(dstInfo, dstPixels, dstInfo.minRowBytes()); 624 bool success = src->readPixels(dstPixmap, 0, 0); 625 REPORTER_ASSERT(r, success == SkImageInfoValidConversion(dstInfo, srcInfo)); 626 627 if (success) { 628 if (kGray_8_SkColorType == srcInfo.colorType() && 629 kGray_8_SkColorType != dstInfo.colorType()) { 630 // TODO: test (r,g,b) == (gray,gray,gray)? 631 return; 632 } 633 634 if (kGray_8_SkColorType == dstInfo.colorType() && 635 kGray_8_SkColorType != srcInfo.colorType()) { 636 // TODO: test gray = luminance? 637 return; 638 } 639 640 if (kAlpha_8_SkColorType == srcInfo.colorType() && 641 kAlpha_8_SkColorType != dstInfo.colorType()) { 642 // TODO: test output = black with this alpha? 643 return; 644 } 645 646 REPORTER_ASSERT(r, 0 == memcmp(dstPixels, five_reference_pixels(dstInfo.colorType()), 647 kNumPixels * SkColorTypeBytesPerPixel(dstInfo.colorType()))); 648 } 649 } 650 651 DEF_TEST(ReadPixels_ValidConversion, reporter) { 652 const SkColorType kColorTypes[] = { 653 kUnknown_SkColorType, 654 kAlpha_8_SkColorType, 655 kRGB_565_SkColorType, 656 kARGB_4444_SkColorType, 657 kRGBA_8888_SkColorType, 658 kBGRA_8888_SkColorType, 659 kGray_8_SkColorType, 660 kRGBA_F16_SkColorType, 661 }; 662 663 const SkAlphaType kAlphaTypes[] = { 664 kUnknown_SkAlphaType, 665 kOpaque_SkAlphaType, 666 kPremul_SkAlphaType, 667 kUnpremul_SkAlphaType, 668 }; 669 670 const sk_sp<SkColorSpace> kColorSpaces[] = { 671 nullptr, 672 SkColorSpace::MakeSRGB(), 673 }; 674 675 for (SkColorType dstCT : kColorTypes) { 676 for (SkAlphaType dstAT: kAlphaTypes) { 677 for (sk_sp<SkColorSpace> dstCS : kColorSpaces) { 678 for (SkColorType srcCT : kColorTypes) { 679 for (SkAlphaType srcAT: kAlphaTypes) { 680 for (sk_sp<SkColorSpace> srcCS : kColorSpaces) { 681 test_conversion(reporter, 682 SkImageInfo::Make(kNumPixels, 1, dstCT, dstAT, dstCS), 683 SkImageInfo::Make(kNumPixels, 1, srcCT, srcAT, srcCS)); 684 } 685 } 686 } 687 } 688 } 689 } 690 } 691
