sk_tool_utils.cpp revision 5a625e08f05157c1519012d8d04942c8f7606ba8
1dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes/* 2dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes * Copyright 2014 Google Inc. 3dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes * 4dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes * Use of this source code is governed by a BSD-style license that can be 5dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes * found in the LICENSE file. 6dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes */ 7dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 8dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "sk_tool_utils.h" 9dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "sk_tool_utils_flags.h" 10dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 11dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "Resources.h" 12dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkBitmap.h" 13dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkCanvas.h" 14dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkCommonFlags.h" 15dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkFontMgr.h" 16e5fea3d504609d22337a5311d3ce0e72314bceeeNarayan Kamath#include "SkFontStyle.h" 17dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkPixelRef.h" 18dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkPM4f.h" 19dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkPoint3.h" 20dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkShader.h" 21dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkTestScalerContext.h" 22dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes#include "SkTextBlob.h" 23dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 24dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott HughesDEFINE_bool(portableFonts, false, "Use portable fonts"); 25dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 26dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughesnamespace sk_tool_utils { 27dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 28dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes/* these are the default fonts chosen by Chrome for serif, sans-serif, and monospace */ 29dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughesstatic const char* gStandardFontNames[][3] = { 30dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "Times", "Helvetica", "Courier" }, // Mac 31dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "Times New Roman", "Helvetica", "Courier" }, // iOS 32dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "Times New Roman", "Arial", "Courier New" }, // Win 33dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "Times New Roman", "Arial", "Monospace" }, // Ubuntu 34dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "serif", "sans-serif", "monospace" }, // Android 35dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes { "Tinos", "Arimo", "Cousine" } // ChromeOS 36dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes}; 37dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes 38dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughesconst char* platform_font_name(const char* name) { 39dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes SkString platform = major_platform_os_name(); 40dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes int index; 41dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes if (!strcmp(name, "serif")) { 42dce2b2fa9d6b26414a8d5a55918e4d7ca2ab1baaElliott Hughes index = 0; 43 } else if (!strcmp(name, "san-serif")) { 44 index = 1; 45 } else if (!strcmp(name, "monospace")) { 46 index = 2; 47 } else { 48 return name; 49 } 50 if (platform.equals("Mac")) { 51 return gStandardFontNames[0][index]; 52 } 53 if (platform.equals("iOS")) { 54 return gStandardFontNames[1][index]; 55 } 56 if (platform.equals("Win")) { 57 return gStandardFontNames[2][index]; 58 } 59 if (platform.equals("Ubuntu") || platform.equals("Debian")) { 60 return gStandardFontNames[3][index]; 61 } 62 if (platform.equals("Android")) { 63 return gStandardFontNames[4][index]; 64 } 65 if (platform.equals("ChromeOS")) { 66 return gStandardFontNames[5][index]; 67 } 68 return name; 69} 70 71const char* platform_os_emoji() { 72 const char* osName = platform_os_name(); 73 if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu") || !strcmp(osName, "Debian")) { 74 return "CBDT"; 75 } 76 if (!strncmp(osName, "Mac", 3) || !strncmp(osName, "iOS", 3)) { 77 return "SBIX"; 78 } 79 if (!strncmp(osName, "Win", 3)) { 80 return "COLR"; 81 } 82 return ""; 83} 84 85sk_sp<SkTypeface> emoji_typeface() { 86 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 87 return MakeResourceAsTypeface("/fonts/Funkster.ttf"); 88 } 89 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) { 90 return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle()); 91 } 92 if (!strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) { 93 sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault()); 94 const char *colorEmojiFontName = "Segoe UI Emoji"; 95 sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle())); 96 if (typeface) { 97 return typeface; 98 } 99 sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter( 100 colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */, 101 0x1f4b0 /* character: */)); 102 if (fallback) { 103 return fallback; 104 } 105 // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol. 106 // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji. 107 return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle()); 108 } 109 return nullptr; 110} 111 112const char* emoji_sample_text() { 113 if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { 114 return "Hamburgefons"; 115 } 116 if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX") || 117 !strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) 118 { 119 return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // 120 "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // 121 "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 122 "\xF0\x9F\x93\xA6" // 123 "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 124 } 125 return ""; 126} 127 128const char* platform_os_name() { 129 for (int index = 0; index < FLAGS_key.count(); index += 2) { 130 if (!strcmp("os", FLAGS_key[index])) { 131 return FLAGS_key[index + 1]; 132 } 133 } 134 // when running SampleApp or dm without a --key pair, omit the platform name 135 return ""; 136} 137 138// omit version number in returned value 139SkString major_platform_os_name() { 140 SkString name; 141 for (int index = 0; index < FLAGS_key.count(); index += 2) { 142 if (!strcmp("os", FLAGS_key[index])) { 143 const char* platform = FLAGS_key[index + 1]; 144 const char* end = platform; 145 while (*end && (*end < '0' || *end > '9')) { 146 ++end; 147 } 148 name.append(platform, end - platform); 149 break; 150 } 151 } 152 return name; 153} 154 155const char* platform_extra_config(const char* config) { 156 for (int index = 0; index < FLAGS_key.count(); index += 2) { 157 if (!strcmp("extra_config", FLAGS_key[index]) && !strcmp(config, FLAGS_key[index + 1])) { 158 return config; 159 } 160 } 161 return ""; 162} 163 164const char* colortype_name(SkColorType ct) { 165 switch (ct) { 166 case kUnknown_SkColorType: return "Unknown"; 167 case kAlpha_8_SkColorType: return "Alpha_8"; 168 case kARGB_4444_SkColorType: return "ARGB_4444"; 169 case kRGB_565_SkColorType: return "RGB_565"; 170 case kRGBA_8888_SkColorType: return "RGBA_8888"; 171 case kBGRA_8888_SkColorType: return "BGRA_8888"; 172 case kRGBA_F16_SkColorType: return "RGBA_F16"; 173 default: 174 SkASSERT(false); 175 return "unexpected colortype"; 176 } 177} 178 179SkColor color_to_565(SkColor color) { 180 SkPMColor pmColor = SkPreMultiplyColor(color); 181 U16CPU color16 = SkPixel32ToPixel16(pmColor); 182 return SkPixel16ToColor(color16); 183} 184 185sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) { 186 return create_font(name, style); 187} 188 189void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) { 190 paint->setTypeface(create_font(name, style)); 191} 192 193void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y, 194 SkColorType colorType, SkAlphaType alphaType) { 195 SkBitmap tmp(bitmap); 196 const SkImageInfo info = SkImageInfo::Make(tmp.width(), tmp.height(), colorType, alphaType); 197 198 canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y); 199} 200 201sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) { 202 SkBitmap bm; 203 bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType)); 204 bm.eraseColor(c1); 205 bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2); 206 bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2); 207 return SkShader::MakeBitmapShader( 208 bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); 209} 210 211SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int checkSize) { 212 SkBitmap bitmap; 213 bitmap.allocPixels(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 214 SkCanvas canvas(bitmap); 215 216 sk_tool_utils::draw_checkerboard(&canvas, c1, c2, checkSize); 217 return bitmap; 218} 219 220void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) { 221 SkPaint paint; 222 paint.setShader(create_checkerboard_shader(c1, c2, size)); 223 paint.setBlendMode(SkBlendMode::kSrc); 224 canvas->drawPaint(paint); 225} 226 227SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y, 228 int textSize, const char* str) { 229 SkBitmap bitmap; 230 bitmap.allocN32Pixels(w, h); 231 SkCanvas canvas(bitmap); 232 233 SkPaint paint; 234 paint.setAntiAlias(true); 235 sk_tool_utils::set_portable_typeface(&paint); 236 paint.setColor(c); 237 paint.setTextSize(SkIntToScalar(textSize)); 238 239 canvas.clear(0x00000000); 240 canvas.drawString(str, SkIntToScalar(x), SkIntToScalar(y), paint); 241 242 // Tag data as sRGB (without doing any color space conversion). Color-space aware configs 243 // will process this correctly but legacy configs will render as if this returned N32. 244 SkBitmap result; 245 result.setInfo(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); 246 result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0); 247 return result; 248} 249 250void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint, 251 SkScalar x, SkScalar y) { 252 SkPaint paint(origPaint); 253 SkTDArray<uint16_t> glyphs; 254 255 size_t len = strlen(text); 256 glyphs.append(paint.textToGlyphs(text, len, nullptr)); 257 paint.textToGlyphs(text, len, glyphs.begin()); 258 259 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 260 const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y, 261 nullptr); 262 memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t)); 263} 264 265#if !defined(__clang__) && defined(_MSC_VER) 266 // MSVC takes ~2 minutes to compile this function with optimization. 267 // We don't really care to wait that long for this function. 268 #pragma optimize("", off) 269#endif 270void make_big_path(SkPath& path) { 271 #include "BigPathBench.inc" 272} 273 274static float gaussian2d_value(int x, int y, float sigma) { 275 // don't bother with the scale term since we're just going to normalize the 276 // kernel anyways 277 float temp = expf(-(x*x + y*y)/(2*sigma*sigma)); 278 return temp; 279} 280 281static float* create_2d_kernel(float sigma, int* filterSize) { 282 // We will actually take 2*halfFilterSize+1 samples (i.e., our filter kernel 283 // sizes are always odd) 284 int halfFilterSize = SkScalarCeilToInt(6*sigma)/2; 285 int wh = *filterSize = 2*halfFilterSize + 1; 286 287 float* temp = new float[wh*wh]; 288 289 float filterTot = 0.0f; 290 for (int yOff = 0; yOff < wh; ++yOff) { 291 for (int xOff = 0; xOff < wh; ++xOff) { 292 temp[yOff*wh+xOff] = gaussian2d_value(xOff-halfFilterSize, yOff-halfFilterSize, sigma); 293 294 filterTot += temp[yOff*wh+xOff]; 295 } 296 } 297 298 // normalize the kernel 299 for (int yOff = 0; yOff < wh; ++yOff) { 300 for (int xOff = 0; xOff < wh; ++xOff) { 301 temp[yOff*wh+xOff] /= filterTot; 302 } 303 } 304 305 return temp; 306} 307 308static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) { 309 SkASSERT(wh & 0x1); 310 311 int halfFilterSize = (wh-1)/2; 312 313 float r = 0.0f, g = 0.0f, b = 0.0f; 314 for (int yOff = 0; yOff < wh; ++yOff) { 315 int ySamp = y + yOff - halfFilterSize; 316 317 if (ySamp < 0) { 318 ySamp = 0; 319 } else if (ySamp > bm.height()-1) { 320 ySamp = bm.height()-1; 321 } 322 323 for (int xOff = 0; xOff < wh; ++xOff) { 324 int xSamp = x + xOff - halfFilterSize; 325 326 if (xSamp < 0) { 327 xSamp = 0; 328 } else if (xSamp > bm.width()-1) { 329 xSamp = bm.width()-1; 330 } 331 332 float filter = kernel[yOff*wh + xOff]; 333 334 SkPMColor c = *bm.getAddr32(xSamp, ySamp); 335 336 r += SkGetPackedR32(c) * filter; 337 g += SkGetPackedG32(c) * filter; 338 b += SkGetPackedB32(c) * filter; 339 } 340 } 341 342 U8CPU r8, g8, b8; 343 344 r8 = (U8CPU) (r+0.5f); 345 g8 = (U8CPU) (g+0.5f); 346 b8 = (U8CPU) (b+0.5f); 347 348 return SkPackARGB32(255, r8, g8, b8); 349} 350 351SkBitmap slow_blur(const SkBitmap& src, float sigma) { 352 SkBitmap dst; 353 354 dst.allocN32Pixels(src.width(), src.height(), true); 355 356 int wh; 357 std::unique_ptr<float[]> kernel(create_2d_kernel(sigma, &wh)); 358 359 for (int y = 0; y < src.height(); ++y) { 360 for (int x = 0; x < src.width(); ++x) { 361 *dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh); 362 } 363 } 364 365 return dst; 366} 367 368// compute the intersection point between the diagonal and the ellipse in the 369// lower right corner 370static SkPoint intersection(SkScalar w, SkScalar h) { 371 SkASSERT(w > 0.0f || h > 0.0f); 372 373 return SkPoint::Make(w / SK_ScalarSqrt2, h / SK_ScalarSqrt2); 374} 375 376// Use the intersection of the corners' diagonals with their ellipses to shrink 377// the bounding rect 378SkRect compute_central_occluder(const SkRRect& rr) { 379 const SkRect r = rr.getBounds(); 380 381 SkScalar newL = r.fLeft, newT = r.fTop, newR = r.fRight, newB = r.fBottom; 382 383 SkVector radii = rr.radii(SkRRect::kUpperLeft_Corner); 384 if (!radii.isZero()) { 385 SkPoint p = intersection(radii.fX, radii.fY); 386 387 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 388 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 389 } 390 391 radii = rr.radii(SkRRect::kUpperRight_Corner); 392 if (!radii.isZero()) { 393 SkPoint p = intersection(radii.fX, radii.fY); 394 395 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 396 newT = SkTMax(newT, r.fTop + radii.fY - p.fY); 397 } 398 399 radii = rr.radii(SkRRect::kLowerRight_Corner); 400 if (!radii.isZero()) { 401 SkPoint p = intersection(radii.fX, radii.fY); 402 403 newR = SkTMin(newR, r.fRight + p.fX - radii.fX); 404 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 405 } 406 407 radii = rr.radii(SkRRect::kLowerLeft_Corner); 408 if (!radii.isZero()) { 409 SkPoint p = intersection(radii.fX, radii.fY); 410 411 newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); 412 newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); 413 } 414 415 return SkRect::MakeLTRB(newL, newT, newR, newB); 416} 417 418// The widest inset rect 419SkRect compute_widest_occluder(const SkRRect& rr) { 420 const SkRect& r = rr.getBounds(); 421 422 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 423 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 424 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 425 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 426 427 SkScalar maxT = SkTMax(ul.fY, ur.fY); 428 SkScalar maxB = SkTMax(ll.fY, lr.fY); 429 430 return SkRect::MakeLTRB(r.fLeft, r.fTop + maxT, r.fRight, r.fBottom - maxB); 431 432} 433 434// The tallest inset rect 435SkRect compute_tallest_occluder(const SkRRect& rr) { 436 const SkRect& r = rr.getBounds(); 437 438 const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); 439 const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); 440 const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); 441 const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); 442 443 SkScalar maxL = SkTMax(ul.fX, ll.fX); 444 SkScalar maxR = SkTMax(ur.fX, lr.fX); 445 446 return SkRect::MakeLTRB(r.fLeft + maxL, r.fTop, r.fRight - maxR, r.fBottom); 447} 448 449bool copy_to(SkBitmap* dst, SkColorType dstColorType, const SkBitmap& src) { 450 SkPixmap srcPM; 451 if (!src.peekPixels(&srcPM)) { 452 return false; 453 } 454 455 SkBitmap tmpDst; 456 SkImageInfo dstInfo = srcPM.info().makeColorType(dstColorType); 457 if (!tmpDst.setInfo(dstInfo)) { 458 return false; 459 } 460 461 if (!tmpDst.tryAllocPixels()) { 462 return false; 463 } 464 465 SkPixmap dstPM; 466 if (!tmpDst.peekPixels(&dstPM)) { 467 return false; 468 } 469 470 if (!srcPM.readPixels(dstPM)) { 471 return false; 472 } 473 474 dst->swap(tmpDst); 475 return true; 476} 477 478void copy_to_g8(SkBitmap* dst, const SkBitmap& src) { 479 SkASSERT(kBGRA_8888_SkColorType == src.colorType() || 480 kRGBA_8888_SkColorType == src.colorType()); 481 482 SkImageInfo grayInfo = src.info().makeColorType(kGray_8_SkColorType); 483 dst->allocPixels(grayInfo); 484 uint8_t* dst8 = (uint8_t*)dst->getPixels(); 485 const uint32_t* src32 = (const uint32_t*)src.getPixels(); 486 487 const int w = src.width(); 488 const int h = src.height(); 489 const bool isBGRA = (kBGRA_8888_SkColorType == src.colorType()); 490 for (int y = 0; y < h; ++y) { 491 if (isBGRA) { 492 // BGRA 493 for (int x = 0; x < w; ++x) { 494 uint32_t s = src32[x]; 495 dst8[x] = SkComputeLuminance((s >> 16) & 0xFF, (s >> 8) & 0xFF, s & 0xFF); 496 } 497 } else { 498 // RGBA 499 for (int x = 0; x < w; ++x) { 500 uint32_t s = src32[x]; 501 dst8[x] = SkComputeLuminance(s & 0xFF, (s >> 8) & 0xFF, (s >> 16) & 0xFF); 502 } 503 } 504 src32 = (const uint32_t*)((const char*)src32 + src.rowBytes()); 505 dst8 += dst->rowBytes(); 506 } 507} 508 509 ////////////////////////////////////////////////////////////////////////////////////////////// 510 511 static int scale255(float x) { 512 return sk_float_round2int(x * 255); 513 } 514 515 static unsigned diff(const SkColorType ct, const void* a, const void* b) { 516 int dr = 0, 517 dg = 0, 518 db = 0, 519 da = 0; 520 switch (ct) { 521 case kRGBA_8888_SkColorType: 522 case kBGRA_8888_SkColorType: { 523 SkPMColor c0 = *(const SkPMColor*)a; 524 SkPMColor c1 = *(const SkPMColor*)b; 525 dr = SkGetPackedR32(c0) - SkGetPackedR32(c1); 526 dg = SkGetPackedG32(c0) - SkGetPackedG32(c1); 527 db = SkGetPackedB32(c0) - SkGetPackedB32(c1); 528 da = SkGetPackedA32(c0) - SkGetPackedA32(c1); 529 } break; 530 case kRGB_565_SkColorType: { 531 uint16_t c0 = *(const uint16_t*)a; 532 uint16_t c1 = *(const uint16_t*)b; 533 dr = SkGetPackedR16(c0) - SkGetPackedR16(c1); 534 dg = SkGetPackedG16(c0) - SkGetPackedG16(c1); 535 db = SkGetPackedB16(c0) - SkGetPackedB16(c1); 536 } break; 537 case kARGB_4444_SkColorType: { 538 uint16_t c0 = *(const uint16_t*)a; 539 uint16_t c1 = *(const uint16_t*)b; 540 dr = SkGetPackedR4444(c0) - SkGetPackedR4444(c1); 541 dg = SkGetPackedG4444(c0) - SkGetPackedG4444(c1); 542 db = SkGetPackedB4444(c0) - SkGetPackedB4444(c1); 543 da = SkGetPackedA4444(c0) - SkGetPackedA4444(c1); 544 } break; 545 case kAlpha_8_SkColorType: 546 case kGray_8_SkColorType: 547 da = (const uint8_t*)a - (const uint8_t*)b; 548 break; 549 case kRGBA_F16_SkColorType: { 550 const SkPM4f* c0 = (const SkPM4f*)a; 551 const SkPM4f* c1 = (const SkPM4f*)b; 552 dr = scale255(c0->r() - c1->r()); 553 dg = scale255(c0->g() - c1->g()); 554 db = scale255(c0->b() - c1->b()); 555 da = scale255(c0->a() - c1->a()); 556 } break; 557 default: 558 return 0; 559 } 560 dr = SkAbs32(dr); 561 dg = SkAbs32(dg); 562 db = SkAbs32(db); 563 da = SkAbs32(da); 564 return SkMax32(dr, SkMax32(dg, SkMax32(db, da))); 565 } 566 567 bool equal_pixels(const SkPixmap& a, const SkPixmap& b, unsigned maxDiff) { 568 if (a.width() != b.width() || 569 a.height() != b.height() || 570 a.colorType() != b.colorType() || 571 a.colorSpace() != b.colorSpace()) 572 { 573 return false; 574 } 575 576 for (int y = 0; y < a.height(); ++y) { 577 const char* aptr = (const char*)a.addr(0, y); 578 const char* bptr = (const char*)b.addr(0, y); 579 if (memcmp(aptr, bptr, a.width() * a.info().bytesPerPixel())) { 580 for (int x = 0; x < a.width(); ++x) { 581 if (diff(a.colorType(), a.addr(x, y), b.addr(x, y)) > maxDiff) { 582 return false; 583 } 584 } 585 } 586 aptr += a.rowBytes(); 587 bptr += b.rowBytes(); 588 } 589 return true; 590 } 591 592 bool equal_pixels(const SkBitmap& bm0, const SkBitmap& bm1, unsigned maxDiff) { 593 SkPixmap pm0, pm1; 594 return bm0.peekPixels(&pm0) && bm1.peekPixels(&pm1) && equal_pixels(pm0, pm1, maxDiff); 595 } 596} // namespace sk_tool_utils 597