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 #if SK_SUPPORT_GPU 26 #include "effects/GrSRGBEffect.h" 27 #include "SkColorFilter.h" 28 29 // Color filter that just wraps GrSRGBEffect 30 class SkSRGBColorFilter : public SkColorFilter { 31 public: 32 static sk_sp<SkColorFilter> Make(GrSRGBEffect::Mode mode) { 33 return sk_sp<SkColorFilter>(new SkSRGBColorFilter(mode)); 34 } 35 36 sk_sp<GrFragmentProcessor> asFragmentProcessor(GrContext*, SkColorSpace*) const override { 37 return GrSRGBEffect::Make(fMode); 38 } 39 40 void filterSpan(const SkPMColor src[], int count, SkPMColor dst[]) const override { 41 SK_ABORT("SkSRGBColorFilter is only implemented for GPU"); 42 } 43 Factory getFactory() const override { return nullptr; } 44 45 #ifndef SK_IGNORE_TO_STRING 46 void toString(SkString* str) const override {} 47 #endif 48 49 private: 50 SkSRGBColorFilter(GrSRGBEffect::Mode mode) : fMode(mode) {} 51 52 GrSRGBEffect::Mode fMode; 53 typedef SkColorFilter INHERITED; 54 }; 55 #endif 56 57 namespace sk_tool_utils { 58 59 /* these are the default fonts chosen by Chrome for serif, sans-serif, and monospace */ 60 static const char* gStandardFontNames[][3] = { 61 { "Times", "Helvetica", "Courier" }, // Mac 62 { "Times New Roman", "Helvetica", "Courier" }, // iOS 63 { "Times New Roman", "Arial", "Courier New" }, // Win 64 { "Times New Roman", "Arial", "Monospace" }, // Ubuntu 65 { "serif", "sans-serif", "monospace" }, // Android 66 { "Tinos", "Arimo", "Cousine" } // ChromeOS 67 }; 68 69 const char* platform_font_name(const char* name) { 70 SkString platform = major_platform_os_name(); 71 int index; 72 if (!strcmp(name, "serif")) { 73 index = 0; 74 } else if (!strcmp(name, "san-serif")) { 75 index = 1; 76 } else if (!strcmp(name, "monospace")) { 77 index = 2; 78 } else { 79 return name; 80 } 81 if (platform.equals("Mac")) { 82 return gStandardFontNames[0][index]; 83 } 84 if (platform.equals("iOS")) { 85 return gStandardFontNames[1][index]; 86 } 87 if (platform.equals("Win")) { 88 return gStandardFontNames[2][index]; 89 } 90 if (platform.equals("Ubuntu")) { 91 return gStandardFontNames[3][index]; 92 } 93 if (platform.equals("Android")) { 94 return gStandardFontNames[4][index]; 95 } 96 if (platform.equals("ChromeOS")) { 97 return gStandardFontNames[5][index]; 98 } 99 return name; 100 } 101 102 const char* platform_os_emoji() { 103 const char* osName = platform_os_name(); 104 if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu")) { 105 return "CBDT"; 106 } 107 if (!strncmp(osName, "Mac", 3) || !strncmp(osName, "iOS", 3)) { 108 return "SBIX"; 109 } 110 if (!strncmp(osName, "Win", 3)) { 111 return "COLR"; 112 } 113 return ""; 114 } 115 116 sk_sp<SkTypeface> emoji_typeface() { 117 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 118 return MakeResourceAsTypeface("/fonts/Funkster.ttf"); 119 } 120 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) { 121 return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle()); 122 } 123 if (!strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) { 124 sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault()); 125 const char *colorEmojiFontName = "Segoe UI Emoji"; 126 sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle())); 127 if (typeface) { 128 return typeface; 129 } 130 sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter( 131 colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */, 132 0x1f4b0 /* character: */)); 133 if (fallback) { 134 return fallback; 135 } 136 // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol. 137 // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji. 138 return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle()); 139 } 140 return nullptr; 141 } 142 143 const char* emoji_sample_text() { 144 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 145 return "Hamburgefons"; 146 } 147 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX") || 148 !strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) 149 { 150 return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // 151 "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // 152 "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 153 "\xF0\x9F\x93\xA6" // 154 "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 155 } 156 return ""; 157 } 158 159 const char* platform_os_name() { 160 for (int index = 0; index < FLAGS_key.count(); index += 2) { 161 if (!strcmp("os", FLAGS_key[index])) { 162 return FLAGS_key[index + 1]; 163 } 164 } 165 // when running SampleApp or dm without a --key pair, omit the platform name 166 return ""; 167 } 168 169 // omit version number in returned value 170 SkString major_platform_os_name() { 171 SkString name; 172 for (int index = 0; index < FLAGS_key.count(); index += 2) { 173 if (!strcmp("os", FLAGS_key[index])) { 174 const char* platform = FLAGS_key[index + 1]; 175 const char* end = platform; 176 while (*end && (*end < '0' || *end > '9')) { 177 ++end; 178 } 179 name.append(platform, end - platform); 180 break; 181 } 182 } 183 return name; 184 } 185 186 const char* platform_extra_config(const char* config) { 187 for (int index = 0; index < FLAGS_key.count(); index += 2) { 188 if (!strcmp("extra_config", FLAGS_key[index]) && !strcmp(config, FLAGS_key[index + 1])) { 189 return config; 190 } 191 } 192 return ""; 193 } 194 195 const char* colortype_name(SkColorType ct) { 196 switch (ct) { 197 case kUnknown_SkColorType: return "Unknown"; 198 case kAlpha_8_SkColorType: return "Alpha_8"; 199 case kIndex_8_SkColorType: return "Index_8"; 200 case kARGB_4444_SkColorType: return "ARGB_4444"; 201 case kRGB_565_SkColorType: return "RGB_565"; 202 case kRGBA_8888_SkColorType: return "RGBA_8888"; 203 case kBGRA_8888_SkColorType: return "BGRA_8888"; 204 case kRGBA_F16_SkColorType: return "RGBA_F16"; 205 default: 206 SkASSERT(false); 207 return "unexpected colortype"; 208 } 209 } 210 211 SkColor color_to_565(SkColor color) { 212 SkPMColor pmColor = SkPreMultiplyColor(color); 213 U16CPU color16 = SkPixel32ToPixel16(pmColor); 214 return SkPixel16ToColor(color16); 215 } 216 217 sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) { 218 return create_font(name, style); 219 } 220 221 void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) { 222 paint->setTypeface(create_font(name, style)); 223 } 224 225 void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y, 226 SkColorType colorType, SkAlphaType alphaType) { 227 SkBitmap tmp(bitmap); 228 tmp.lockPixels(); 229 230 const SkImageInfo info = SkImageInfo::Make(tmp.width(), tmp.height(), colorType, alphaType); 231 232 canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y); 233 } 234 235 sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) { 236 SkBitmap bm; 237 bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType)); 238 bm.eraseColor(c1); 239 bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2); 240 bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2); 241 return SkShader::MakeBitmapShader( 242 bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); 243 } 244 245 SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int checkSize) { 246 SkBitmap bitmap; 247 bitmap.allocPixels(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 248 SkCanvas canvas(bitmap); 249 250 sk_tool_utils::draw_checkerboard(&canvas, c1, c2, checkSize); 251 return bitmap; 252 } 253 254 void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) { 255 SkPaint paint; 256 paint.setShader(create_checkerboard_shader(c1, c2, size)); 257 paint.setBlendMode(SkBlendMode::kSrc); 258 canvas->drawPaint(paint); 259 } 260 261 SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y, 262 int textSize, const char* str) { 263 SkBitmap bitmap; 264 bitmap.allocN32Pixels(w, h); 265 SkCanvas canvas(bitmap); 266 267 SkPaint paint; 268 paint.setAntiAlias(true); 269 sk_tool_utils::set_portable_typeface(&paint); 270 paint.setColor(c); 271 paint.setTextSize(SkIntToScalar(textSize)); 272 273 canvas.clear(0x00000000); 274 canvas.drawText(str, strlen(str), SkIntToScalar(x), SkIntToScalar(y), paint); 275 276 // Tag data as sRGB (without doing any color space conversion). Color-space aware configs 277 // will process this correctly but legacy configs will render as if this returned N32. 278 SkBitmap result; 279 result.setInfo(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 280 result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0); 281 return result; 282 } 283 284 void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint, 285 SkScalar x, SkScalar y) { 286 SkPaint paint(origPaint); 287 SkTDArray<uint16_t> glyphs; 288 289 size_t len = strlen(text); 290 glyphs.append(paint.textToGlyphs(text, len, nullptr)); 291 paint.textToGlyphs(text, len, glyphs.begin()); 292 293 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 294 const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y, 295 nullptr); 296 memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t)); 297 } 298 299 static inline void norm_to_rgb(SkBitmap* bm, int x, int y, const SkVector3& norm) { 300 SkASSERT(SkScalarNearlyEqual(norm.length(), 1.0f)); 301 unsigned char r = static_cast<unsigned char>((0.5f * norm.fX + 0.5f) * 255); 302 unsigned char g = static_cast<unsigned char>((-0.5f * norm.fY + 0.5f) * 255); 303 unsigned char b = static_cast<unsigned char>((0.5f * norm.fZ + 0.5f) * 255); 304 *bm->getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b); 305 } 306 307 void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst) { 308 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 309 dst.fTop + (dst.height() / 2.0f)); 310 const SkPoint halfSize = SkPoint::Make(dst.width() / 2.0f, dst.height() / 2.0f); 311 312 SkVector3 norm; 313 314 for (int y = dst.fTop; y < dst.fBottom; ++y) { 315 for (int x = dst.fLeft; x < dst.fRight; ++x) { 316 norm.fX = (x + 0.5f - center.fX) / halfSize.fX; 317 norm.fY = (y + 0.5f - center.fY) / halfSize.fY; 318 319 SkScalar tmp = norm.fX * norm.fX + norm.fY * norm.fY; 320 if (tmp >= 1.0f) { 321 norm.set(0.0f, 0.0f, 1.0f); 322 } else { 323 norm.fZ = sqrtf(1.0f - tmp); 324 } 325 326 norm_to_rgb(bm, x, y, norm); 327 } 328 } 329 } 330 331 void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst) { 332 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 333 dst.fTop + (dst.height() / 2.0f)); 334 335 SkIRect inner = dst; 336 inner.inset(dst.width()/4, dst.height()/4); 337 338 SkPoint3 norm; 339 const SkPoint3 left = SkPoint3::Make(-SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); 340 const SkPoint3 up = SkPoint3::Make(0.0f, -SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 341 const SkPoint3 right = SkPoint3::Make(SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); 342 const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 343 344 for (int y = dst.fTop; y < dst.fBottom; ++y) { 345 for (int x = dst.fLeft; x < dst.fRight; ++x) { 346 if (inner.contains(x, y)) { 347 norm.set(0.0f, 0.0f, 1.0f); 348 } else { 349 SkScalar locX = x + 0.5f - center.fX; 350 SkScalar locY = y + 0.5f - center.fY; 351 352 if (locX >= 0.0f) { 353 if (locY > 0.0f) { 354 norm = locX >= locY ? right : down; // LR corner 355 } else { 356 norm = locX > -locY ? right : up; // UR corner 357 } 358 } else { 359 if (locY > 0.0f) { 360 norm = -locX > locY ? left : down; // LL corner 361 } else { 362 norm = locX > locY ? up : left; // UL corner 363 } 364 } 365 } 366 367 norm_to_rgb(bm, x, y, norm); 368 } 369 } 370 } 371 372 void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst) { 373 const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), 374 dst.fTop + (dst.height() / 2.0f)); 375 376 static const SkScalar k1OverRoot3 = 0.5773502692f; 377 378 SkPoint3 norm; 379 const SkPoint3 leftUp = SkPoint3::Make(-k1OverRoot3, -k1OverRoot3, k1OverRoot3); 380 const SkPoint3 rightUp = SkPoint3::Make(k1OverRoot3, -k1OverRoot3, k1OverRoot3); 381 const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); 382 383 for (int y = dst.fTop; y < dst.fBottom; ++y) { 384 for (int x = dst.fLeft; x < dst.fRight; ++x) { 385 SkScalar locX = x + 0.5f - center.fX; 386 SkScalar locY = y + 0.5f - center.fY; 387 388 if (locX >= 0.0f) { 389 if (locY > 0.0f) { 390 norm = locX >= locY ? rightUp : down; // LR corner 391 } else { 392 norm = rightUp; 393 } 394 } else { 395 if (locY > 0.0f) { 396 norm = -locX > locY ? leftUp : down; // LL corner 397 } else { 398 norm = leftUp; 399 } 400 } 401 402 norm_to_rgb(bm, x, y, norm); 403 } 404 } 405 } 406 407 #if defined(_MSC_VER) 408 // MSVC takes ~2 minutes to compile this function with optimization. 409 // We don't really care to wait that long for this function. 410 #pragma optimize("", off) 411 #endif 412 void make_big_path(SkPath& path) { 413 #include "BigPathBench.inc" 414 } 415 416 static float gaussian2d_value(int x, int y, float sigma) { 417 // don't bother with the scale term since we're just going to normalize the 418 // kernel anyways 419 float temp = expf(-(x*x + y*y)/(2*sigma*sigma)); 420 return temp; 421 } 422 423 static float* create_2d_kernel(float sigma, int* filterSize) { 424 // We will actually take 2*halfFilterSize+1 samples (i.e., our filter kernel 425 // sizes are always odd) 426 int halfFilterSize = SkScalarCeilToInt(6*sigma)/2; 427 int wh = *filterSize = 2*halfFilterSize + 1; 428 429 float* temp = new float[wh*wh]; 430 431 float filterTot = 0.0f; 432 for (int yOff = 0; yOff < wh; ++yOff) { 433 for (int xOff = 0; xOff < wh; ++xOff) { 434 temp[yOff*wh+xOff] = gaussian2d_value(xOff-halfFilterSize, yOff-halfFilterSize, sigma); 435 436 filterTot += temp[yOff*wh+xOff]; 437 } 438 } 439 440 // normalize the kernel 441 for (int yOff = 0; yOff < wh; ++yOff) { 442 for (int xOff = 0; xOff < wh; ++xOff) { 443 temp[yOff*wh+xOff] /= filterTot; 444 } 445 } 446 447 return temp; 448 } 449 450 static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) { 451 SkASSERT(wh & 0x1); 452 453 int halfFilterSize = (wh-1)/2; 454 455 float r = 0.0f, g = 0.0f, b = 0.0f; 456 for (int yOff = 0; yOff < wh; ++yOff) { 457 int ySamp = y + yOff - halfFilterSize; 458 459 if (ySamp < 0) { 460 ySamp = 0; 461 } else if (ySamp > bm.height()-1) { 462 ySamp = bm.height()-1; 463 } 464 465 for (int xOff = 0; xOff < wh; ++xOff) { 466 int xSamp = x + xOff - halfFilterSize; 467 468 if (xSamp < 0) { 469 xSamp = 0; 470 } else if (xSamp > bm.width()-1) { 471 xSamp = bm.width()-1; 472 } 473 474 float filter = kernel[yOff*wh + xOff]; 475 476 SkPMColor c = *bm.getAddr32(xSamp, ySamp); 477 478 r += SkGetPackedR32(c) * filter; 479 g += SkGetPackedG32(c) * filter; 480 b += SkGetPackedB32(c) * filter; 481 } 482 } 483 484 U8CPU r8, g8, b8; 485 486 r8 = (U8CPU) (r+0.5f); 487 g8 = (U8CPU) (g+0.5f); 488 b8 = (U8CPU) (b+0.5f); 489 490 return SkPackARGB32(255, r8, g8, b8); 491 } 492 493 SkBitmap slow_blur(const SkBitmap& src, float sigma) { 494 SkBitmap dst; 495 496 dst.allocN32Pixels(src.width(), src.height(), true); 497 498 int wh; 499 std::unique_ptr<float[]> kernel(create_2d_kernel(sigma, &wh)); 500 501 for (int y = 0; y < src.height(); ++y) { 502 for (int x = 0; x < src.width(); ++x) { 503 *dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh); 504 } 505 } 506 507 return dst; 508 } 509 510 // compute the intersection point between the diagonal and the ellipse in the 511 // lower right corner 512 static SkPoint intersection(SkScalar w, SkScalar h) { 513 SkASSERT(w > 0.0f || h > 0.0f); 514 515 return SkPoint::Make(w / SK_ScalarSqrt2, h / SK_ScalarSqrt2); 516 } 517 518 // Use the intersection of the corners' diagonals with their ellipses to shrink 519 // the bounding rect 520 SkRect compute_central_occluder(const SkRRect& rr) { 521 const SkRect r = rr.getBounds(); 522 523 SkScalar newL = r.fLeft, newT = r.fTop, newR = r.fRight, newB = r.fBottom; 524 525 SkVector radii = rr.radii(SkRRect::kUpperLeft_Corner); 526 if (!radii.isZero()) { 527 SkPoint p = intersection(radii.fX, radii.fY); 528 529 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 530 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 531 } 532 533 radii = rr.radii(SkRRect::kUpperRight_Corner); 534 if (!radii.isZero()) { 535 SkPoint p = intersection(radii.fX, radii.fY); 536 537 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 538 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 539 } 540 541 radii = rr.radii(SkRRect::kLowerRight_Corner); 542 if (!radii.isZero()) { 543 SkPoint p = intersection(radii.fX, radii.fY); 544 545 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 546 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 547 } 548 549 radii = rr.radii(SkRRect::kLowerLeft_Corner); 550 if (!radii.isZero()) { 551 SkPoint p = intersection(radii.fX, radii.fY); 552 553 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 554 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 555 } 556 557 return SkRect::MakeLTRB(newL, newT, newR, newB); 558 } 559 560 // The widest inset rect 561 SkRect compute_widest_occluder(const SkRRect& rr) { 562 const SkRect& r = rr.getBounds(); 563 564 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 565 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 566 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 567 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 568 569 SkScalar maxT = SkTMax(ul.fY, ur.fY); 570 SkScalar maxB = SkTMax(ll.fY, lr.fY); 571 572 return SkRect::MakeLTRB(r.fLeft, r.fTop + maxT, r.fRight, r.fBottom - maxB); 573 574 } 575 576 // The tallest inset rect 577 SkRect compute_tallest_occluder(const SkRRect& rr) { 578 const SkRect& r = rr.getBounds(); 579 580 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 581 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 582 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 583 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 584 585 SkScalar maxL = SkTMax(ul.fX, ll.fX); 586 SkScalar maxR = SkTMax(ur.fX, lr.fX); 587 588 return SkRect::MakeLTRB(r.fLeft + maxL, r.fTop, r.fRight - maxR, r.fBottom); 589 } 590 591 void copy_to_g8(SkBitmap* dst, const SkBitmap& src) { 592 SkASSERT(kBGRA_8888_SkColorType == src.colorType() || 593 kRGBA_8888_SkColorType == src.colorType()); 594 595 SkImageInfo grayInfo = src.info().makeColorType(kGray_8_SkColorType); 596 dst->allocPixels(grayInfo); 597 uint8_t* dst8 = (uint8_t*)dst->getPixels(); 598 const uint32_t* src32 = (const uint32_t*)src.getPixels(); 599 600 const int w = src.width(); 601 const int h = src.height(); 602 const bool isBGRA = (kBGRA_8888_SkColorType == src.colorType()); 603 for (int y = 0; y < h; ++y) { 604 if (isBGRA) { 605 // BGRA 606 for (int x = 0; x < w; ++x) { 607 uint32_t s = src32[x]; 608 dst8[x] = SkComputeLuminance((s >> 16) & 0xFF, (s >> 8) & 0xFF, s & 0xFF); 609 } 610 } else { 611 // RGBA 612 for (int x = 0; x < w; ++x) { 613 uint32_t s = src32[x]; 614 dst8[x] = SkComputeLuminance(s & 0xFF, (s >> 8) & 0xFF, (s >> 16) & 0xFF); 615 } 616 } 617 src32 = (const uint32_t*)((const char*)src32 + src.rowBytes()); 618 dst8 += dst->rowBytes(); 619 } 620 } 621 622 #if SK_SUPPORT_GPU 623 sk_sp<SkColorFilter> MakeLinearToSRGBColorFilter() { 624 return SkSRGBColorFilter::Make(GrSRGBEffect::Mode::kLinearToSRGB); 625 } 626 627 sk_sp<SkColorFilter> MakeSRGBToLinearColorFilter() { 628 return SkSRGBColorFilter::Make(GrSRGBEffect::Mode::kSRGBToLinear); 629 } 630 #endif 631 632 } // namespace sk_tool_utils 633