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 "sk_tool_utils.h" 9 #include "sk_tool_utils_flags.h" 10 11 #include "Resources.h" 12 #include "SkBitmap.h" 13 #include "SkCanvas.h" 14 #include "SkCommonFlags.h" 15 #include "SkFontMgr.h" 16 #include "SkFontStyle.h" 17 #include "SkPixelRef.h" 18 #include "SkPoint3.h" 19 #include "SkShader.h" 20 #include "SkTestScalerContext.h" 21 #include "SkTextBlob.h" 22 23 DEFINE_bool(portableFonts, false, "Use portable fonts"); 24 25 namespace sk_tool_utils { 26 27 /* these are the default fonts chosen by Chrome for serif, sans-serif, and monospace */ 28 static const char* gStandardFontNames[][3] = { 29 { "Times", "Helvetica", "Courier" }, // Mac 30 { "Times New Roman", "Helvetica", "Courier" }, // iOS 31 { "Times New Roman", "Arial", "Courier New" }, // Win 32 { "Times New Roman", "Arial", "Monospace" }, // Ubuntu 33 { "serif", "sans-serif", "monospace" }, // Android 34 { "Tinos", "Arimo", "Cousine" } // ChromeOS 35 }; 36 37 const char* platform_font_name(const char* name) { 38 SkString platform = major_platform_os_name(); 39 int index; 40 if (!strcmp(name, "serif")) { 41 index = 0; 42 } else if (!strcmp(name, "san-serif")) { 43 index = 1; 44 } else if (!strcmp(name, "monospace")) { 45 index = 2; 46 } else { 47 return name; 48 } 49 if (platform.equals("Mac")) { 50 return gStandardFontNames[0][index]; 51 } 52 if (platform.equals("iOS")) { 53 return gStandardFontNames[1][index]; 54 } 55 if (platform.equals("Win")) { 56 return gStandardFontNames[2][index]; 57 } 58 if (platform.equals("Ubuntu") || platform.equals("Debian")) { 59 return gStandardFontNames[3][index]; 60 } 61 if (platform.equals("Android")) { 62 return gStandardFontNames[4][index]; 63 } 64 if (platform.equals("ChromeOS")) { 65 return gStandardFontNames[5][index]; 66 } 67 return name; 68 } 69 70 const char* platform_os_emoji() { 71 const char* osName = platform_os_name(); 72 if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu") || !strcmp(osName, "Debian")) { 73 return "CBDT"; 74 } 75 if (!strncmp(osName, "Mac", 3) || !strncmp(osName, "iOS", 3)) { 76 return "SBIX"; 77 } 78 if (!strncmp(osName, "Win", 3)) { 79 return "COLR"; 80 } 81 return ""; 82 } 83 84 sk_sp<SkTypeface> emoji_typeface() { 85 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 86 return MakeResourceAsTypeface("/fonts/Funkster.ttf"); 87 } 88 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) { 89 return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle()); 90 } 91 if (!strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) { 92 sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault()); 93 const char *colorEmojiFontName = "Segoe UI Emoji"; 94 sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle())); 95 if (typeface) { 96 return typeface; 97 } 98 sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter( 99 colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */, 100 0x1f4b0 /* character: */)); 101 if (fallback) { 102 return fallback; 103 } 104 // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol. 105 // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji. 106 return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle()); 107 } 108 return nullptr; 109 } 110 111 const char* emoji_sample_text() { 112 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 113 return "Hamburgefons"; 114 } 115 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX") || 116 !strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) 117 { 118 return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // 119 "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // 120 "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 121 "\xF0\x9F\x93\xA6" // 122 "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 123 } 124 return ""; 125 } 126 127 const char* platform_os_name() { 128 for (int index = 0; index < FLAGS_key.count(); index += 2) { 129 if (!strcmp("os", FLAGS_key[index])) { 130 return FLAGS_key[index + 1]; 131 } 132 } 133 // when running SampleApp or dm without a --key pair, omit the platform name 134 return ""; 135 } 136 137 // omit version number in returned value 138 SkString major_platform_os_name() { 139 SkString name; 140 for (int index = 0; index < FLAGS_key.count(); index += 2) { 141 if (!strcmp("os", FLAGS_key[index])) { 142 const char* platform = FLAGS_key[index + 1]; 143 const char* end = platform; 144 while (*end && (*end < '0' || *end > '9')) { 145 ++end; 146 } 147 name.append(platform, end - platform); 148 break; 149 } 150 } 151 return name; 152 } 153 154 const char* platform_extra_config(const char* config) { 155 for (int index = 0; index < FLAGS_key.count(); index += 2) { 156 if (!strcmp("extra_config", FLAGS_key[index]) && !strcmp(config, FLAGS_key[index + 1])) { 157 return config; 158 } 159 } 160 return ""; 161 } 162 163 const char* colortype_name(SkColorType ct) { 164 switch (ct) { 165 case kUnknown_SkColorType: return "Unknown"; 166 case kAlpha_8_SkColorType: return "Alpha_8"; 167 case kARGB_4444_SkColorType: return "ARGB_4444"; 168 case kRGB_565_SkColorType: return "RGB_565"; 169 case kRGBA_8888_SkColorType: return "RGBA_8888"; 170 case kBGRA_8888_SkColorType: return "BGRA_8888"; 171 case kRGBA_F16_SkColorType: return "RGBA_F16"; 172 default: 173 SkASSERT(false); 174 return "unexpected colortype"; 175 } 176 } 177 178 SkColor color_to_565(SkColor color) { 179 SkPMColor pmColor = SkPreMultiplyColor(color); 180 U16CPU color16 = SkPixel32ToPixel16(pmColor); 181 return SkPixel16ToColor(color16); 182 } 183 184 sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) { 185 return create_font(name, style); 186 } 187 188 void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) { 189 paint->setTypeface(create_font(name, style)); 190 } 191 192 void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y, 193 SkColorType colorType, SkAlphaType alphaType) { 194 SkBitmap tmp(bitmap); 195 const SkImageInfo info = SkImageInfo::Make(tmp.width(), tmp.height(), colorType, alphaType); 196 197 canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y); 198 } 199 200 sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) { 201 SkBitmap bm; 202 bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType)); 203 bm.eraseColor(c1); 204 bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2); 205 bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2); 206 return SkShader::MakeBitmapShader( 207 bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); 208 } 209 210 SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int checkSize) { 211 SkBitmap bitmap; 212 bitmap.allocPixels(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 213 SkCanvas canvas(bitmap); 214 215 sk_tool_utils::draw_checkerboard(&canvas, c1, c2, checkSize); 216 return bitmap; 217 } 218 219 void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) { 220 SkPaint paint; 221 paint.setShader(create_checkerboard_shader(c1, c2, size)); 222 paint.setBlendMode(SkBlendMode::kSrc); 223 canvas->drawPaint(paint); 224 } 225 226 SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y, 227 int textSize, const char* str) { 228 SkBitmap bitmap; 229 bitmap.allocN32Pixels(w, h); 230 SkCanvas canvas(bitmap); 231 232 SkPaint paint; 233 paint.setAntiAlias(true); 234 sk_tool_utils::set_portable_typeface(&paint); 235 paint.setColor(c); 236 paint.setTextSize(SkIntToScalar(textSize)); 237 238 canvas.clear(0x00000000); 239 canvas.drawString(str, SkIntToScalar(x), SkIntToScalar(y), paint); 240 241 // Tag data as sRGB (without doing any color space conversion). Color-space aware configs 242 // will process this correctly but legacy configs will render as if this returned N32. 243 SkBitmap result; 244 result.setInfo(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 245 result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0); 246 return result; 247 } 248 249 void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint, 250 SkScalar x, SkScalar y) { 251 SkPaint paint(origPaint); 252 SkTDArray<uint16_t> glyphs; 253 254 size_t len = strlen(text); 255 glyphs.append(paint.textToGlyphs(text, len, nullptr)); 256 paint.textToGlyphs(text, len, glyphs.begin()); 257 258 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 259 const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y, 260 nullptr); 261 memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t)); 262 } 263 264 static inline void norm_to_rgb(SkBitmap* bm, int x, int y, const SkVector3& norm) { 265 SkASSERT(SkScalarNearlyEqual(norm.length(), 1.0f)); 266 unsigned char r = static_cast<unsigned char>((0.5f * norm.fX + 0.5f) * 255); 267 unsigned char g = static_cast<unsigned char>((-0.5f * norm.fY + 0.5f) * 255); 268 unsigned char b = static_cast<unsigned char>((0.5f * norm.fZ + 0.5f) * 255); 269 *bm->getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b); 270 } 271 272 void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst) { 273 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 274 dst.fTop + (dst.height() / 2.0f)); 275 const SkPoint halfSize = SkPoint::Make(dst.width() / 2.0f, dst.height() / 2.0f); 276 277 SkVector3 norm; 278 279 for (int y = dst.fTop; y < dst.fBottom; ++y) { 280 for (int x = dst.fLeft; x < dst.fRight; ++x) { 281 norm.fX = (x + 0.5f - center.fX) / halfSize.fX; 282 norm.fY = (y + 0.5f - center.fY) / halfSize.fY; 283 284 SkScalar tmp = norm.fX * norm.fX + norm.fY * norm.fY; 285 if (tmp >= 1.0f) { 286 norm.set(0.0f, 0.0f, 1.0f); 287 } else { 288 norm.fZ = sqrtf(1.0f - tmp); 289 } 290 291 norm_to_rgb(bm, x, y, norm); 292 } 293 } 294 } 295 296 void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst) { 297 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 298 dst.fTop + (dst.height() / 2.0f)); 299 300 SkIRect inner = dst; 301 inner.inset(dst.width()/4, dst.height()/4); 302 303 SkPoint3 norm; 304 const SkPoint3 left = SkPoint3::Make(-SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); 305 const SkPoint3 up = SkPoint3::Make(0.0f, -SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 306 const SkPoint3 right = SkPoint3::Make(SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); 307 const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 308 309 for (int y = dst.fTop; y < dst.fBottom; ++y) { 310 for (int x = dst.fLeft; x < dst.fRight; ++x) { 311 if (inner.contains(x, y)) { 312 norm.set(0.0f, 0.0f, 1.0f); 313 } else { 314 SkScalar locX = x + 0.5f - center.fX; 315 SkScalar locY = y + 0.5f - center.fY; 316 317 if (locX >= 0.0f) { 318 if (locY > 0.0f) { 319 norm = locX >= locY ? right : down; // LR corner 320 } else { 321 norm = locX > -locY ? right : up; // UR corner 322 } 323 } else { 324 if (locY > 0.0f) { 325 norm = -locX > locY ? left : down; // LL corner 326 } else { 327 norm = locX > locY ? up : left; // UL corner 328 } 329 } 330 } 331 332 norm_to_rgb(bm, x, y, norm); 333 } 334 } 335 } 336 337 void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst) { 338 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 339 dst.fTop + (dst.height() / 2.0f)); 340 341 static const SkScalar k1OverRoot3 = 0.5773502692f; 342 343 SkPoint3 norm; 344 const SkPoint3 leftUp = SkPoint3::Make(-k1OverRoot3, -k1OverRoot3, k1OverRoot3); 345 const SkPoint3 rightUp = SkPoint3::Make(k1OverRoot3, -k1OverRoot3, k1OverRoot3); 346 const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 347 348 for (int y = dst.fTop; y < dst.fBottom; ++y) { 349 for (int x = dst.fLeft; x < dst.fRight; ++x) { 350 SkScalar locX = x + 0.5f - center.fX; 351 SkScalar locY = y + 0.5f - center.fY; 352 353 if (locX >= 0.0f) { 354 if (locY > 0.0f) { 355 norm = locX >= locY ? rightUp : down; // LR corner 356 } else { 357 norm = rightUp; 358 } 359 } else { 360 if (locY > 0.0f) { 361 norm = -locX > locY ? leftUp : down; // LL corner 362 } else { 363 norm = leftUp; 364 } 365 } 366 367 norm_to_rgb(bm, x, y, norm); 368 } 369 } 370 } 371 372 #if defined(_MSC_VER) 373 // MSVC takes ~2 minutes to compile this function with optimization. 374 // We don't really care to wait that long for this function. 375 #pragma optimize("", off) 376 #endif 377 void make_big_path(SkPath& path) { 378 #include "BigPathBench.inc" 379 } 380 381 static float gaussian2d_value(int x, int y, float sigma) { 382 // don't bother with the scale term since we're just going to normalize the 383 // kernel anyways 384 float temp = expf(-(x*x + y*y)/(2*sigma*sigma)); 385 return temp; 386 } 387 388 static float* create_2d_kernel(float sigma, int* filterSize) { 389 // We will actually take 2*halfFilterSize+1 samples (i.e., our filter kernel 390 // sizes are always odd) 391 int halfFilterSize = SkScalarCeilToInt(6*sigma)/2; 392 int wh = *filterSize = 2*halfFilterSize + 1; 393 394 float* temp = new float[wh*wh]; 395 396 float filterTot = 0.0f; 397 for (int yOff = 0; yOff < wh; ++yOff) { 398 for (int xOff = 0; xOff < wh; ++xOff) { 399 temp[yOff*wh+xOff] = gaussian2d_value(xOff-halfFilterSize, yOff-halfFilterSize, sigma); 400 401 filterTot += temp[yOff*wh+xOff]; 402 } 403 } 404 405 // normalize the kernel 406 for (int yOff = 0; yOff < wh; ++yOff) { 407 for (int xOff = 0; xOff < wh; ++xOff) { 408 temp[yOff*wh+xOff] /= filterTot; 409 } 410 } 411 412 return temp; 413 } 414 415 static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) { 416 SkASSERT(wh & 0x1); 417 418 int halfFilterSize = (wh-1)/2; 419 420 float r = 0.0f, g = 0.0f, b = 0.0f; 421 for (int yOff = 0; yOff < wh; ++yOff) { 422 int ySamp = y + yOff - halfFilterSize; 423 424 if (ySamp < 0) { 425 ySamp = 0; 426 } else if (ySamp > bm.height()-1) { 427 ySamp = bm.height()-1; 428 } 429 430 for (int xOff = 0; xOff < wh; ++xOff) { 431 int xSamp = x + xOff - halfFilterSize; 432 433 if (xSamp < 0) { 434 xSamp = 0; 435 } else if (xSamp > bm.width()-1) { 436 xSamp = bm.width()-1; 437 } 438 439 float filter = kernel[yOff*wh + xOff]; 440 441 SkPMColor c = *bm.getAddr32(xSamp, ySamp); 442 443 r += SkGetPackedR32(c) * filter; 444 g += SkGetPackedG32(c) * filter; 445 b += SkGetPackedB32(c) * filter; 446 } 447 } 448 449 U8CPU r8, g8, b8; 450 451 r8 = (U8CPU) (r+0.5f); 452 g8 = (U8CPU) (g+0.5f); 453 b8 = (U8CPU) (b+0.5f); 454 455 return SkPackARGB32(255, r8, g8, b8); 456 } 457 458 SkBitmap slow_blur(const SkBitmap& src, float sigma) { 459 SkBitmap dst; 460 461 dst.allocN32Pixels(src.width(), src.height(), true); 462 463 int wh; 464 std::unique_ptr<float[]> kernel(create_2d_kernel(sigma, &wh)); 465 466 for (int y = 0; y < src.height(); ++y) { 467 for (int x = 0; x < src.width(); ++x) { 468 *dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh); 469 } 470 } 471 472 return dst; 473 } 474 475 // compute the intersection point between the diagonal and the ellipse in the 476 // lower right corner 477 static SkPoint intersection(SkScalar w, SkScalar h) { 478 SkASSERT(w > 0.0f || h > 0.0f); 479 480 return SkPoint::Make(w / SK_ScalarSqrt2, h / SK_ScalarSqrt2); 481 } 482 483 // Use the intersection of the corners' diagonals with their ellipses to shrink 484 // the bounding rect 485 SkRect compute_central_occluder(const SkRRect& rr) { 486 const SkRect r = rr.getBounds(); 487 488 SkScalar newL = r.fLeft, newT = r.fTop, newR = r.fRight, newB = r.fBottom; 489 490 SkVector radii = rr.radii(SkRRect::kUpperLeft_Corner); 491 if (!radii.isZero()) { 492 SkPoint p = intersection(radii.fX, radii.fY); 493 494 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 495 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 496 } 497 498 radii = rr.radii(SkRRect::kUpperRight_Corner); 499 if (!radii.isZero()) { 500 SkPoint p = intersection(radii.fX, radii.fY); 501 502 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 503 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 504 } 505 506 radii = rr.radii(SkRRect::kLowerRight_Corner); 507 if (!radii.isZero()) { 508 SkPoint p = intersection(radii.fX, radii.fY); 509 510 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 511 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 512 } 513 514 radii = rr.radii(SkRRect::kLowerLeft_Corner); 515 if (!radii.isZero()) { 516 SkPoint p = intersection(radii.fX, radii.fY); 517 518 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 519 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 520 } 521 522 return SkRect::MakeLTRB(newL, newT, newR, newB); 523 } 524 525 // The widest inset rect 526 SkRect compute_widest_occluder(const SkRRect& rr) { 527 const SkRect& r = rr.getBounds(); 528 529 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 530 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 531 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 532 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 533 534 SkScalar maxT = SkTMax(ul.fY, ur.fY); 535 SkScalar maxB = SkTMax(ll.fY, lr.fY); 536 537 return SkRect::MakeLTRB(r.fLeft, r.fTop + maxT, r.fRight, r.fBottom - maxB); 538 539 } 540 541 // The tallest inset rect 542 SkRect compute_tallest_occluder(const SkRRect& rr) { 543 const SkRect& r = rr.getBounds(); 544 545 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 546 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 547 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 548 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 549 550 SkScalar maxL = SkTMax(ul.fX, ll.fX); 551 SkScalar maxR = SkTMax(ur.fX, lr.fX); 552 553 return SkRect::MakeLTRB(r.fLeft + maxL, r.fTop, r.fRight - maxR, r.fBottom); 554 } 555 556 bool copy_to(SkBitmap* dst, SkColorType dstColorType, const SkBitmap& src) { 557 SkPixmap srcPM; 558 if (!src.peekPixels(&srcPM)) { 559 return false; 560 } 561 562 SkBitmap tmpDst; 563 SkImageInfo dstInfo = srcPM.info().makeColorType(dstColorType); 564 if (!tmpDst.setInfo(dstInfo)) { 565 return false; 566 } 567 568 if (!tmpDst.tryAllocPixels()) { 569 return false; 570 } 571 572 SkPixmap dstPM; 573 if (!tmpDst.peekPixels(&dstPM)) { 574 return false; 575 } 576 577 if (!srcPM.readPixels(dstPM)) { 578 return false; 579 } 580 581 dst->swap(tmpDst); 582 return true; 583 } 584 585 void copy_to_g8(SkBitmap* dst, const SkBitmap& src) { 586 SkASSERT(kBGRA_8888_SkColorType == src.colorType() || 587 kRGBA_8888_SkColorType == src.colorType()); 588 589 SkImageInfo grayInfo = src.info().makeColorType(kGray_8_SkColorType); 590 dst->allocPixels(grayInfo); 591 uint8_t* dst8 = (uint8_t*)dst->getPixels(); 592 const uint32_t* src32 = (const uint32_t*)src.getPixels(); 593 594 const int w = src.width(); 595 const int h = src.height(); 596 const bool isBGRA = (kBGRA_8888_SkColorType == src.colorType()); 597 for (int y = 0; y < h; ++y) { 598 if (isBGRA) { 599 // BGRA 600 for (int x = 0; x < w; ++x) { 601 uint32_t s = src32[x]; 602 dst8[x] = SkComputeLuminance((s >> 16) & 0xFF, (s >> 8) & 0xFF, s & 0xFF); 603 } 604 } else { 605 // RGBA 606 for (int x = 0; x < w; ++x) { 607 uint32_t s = src32[x]; 608 dst8[x] = SkComputeLuminance(s & 0xFF, (s >> 8) & 0xFF, (s >> 16) & 0xFF); 609 } 610 } 611 src32 = (const uint32_t*)((const char*)src32 + src.rowBytes()); 612 dst8 += dst->rowBytes(); 613 } 614 } 615 616 } // namespace sk_tool_utils 617
