reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* libs/graphics/sgl/SkScalerContext.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkScalerContext.h" |
| 19 | #include "SkDescriptor.h" |
| 20 | #include "SkDraw.h" |
| 21 | #include "SkFontHost.h" |
| 22 | #include "SkMaskFilter.h" |
| 23 | #include "SkPathEffect.h" |
| 24 | #include "SkRasterizer.h" |
| 25 | #include "SkRegion.h" |
| 26 | #include "SkStroke.h" |
| 27 | #include "SkThread.h" |
| 28 | |
| 29 | #ifdef SK_DEBUG |
| 30 | // #define TRACK_MISSING_CHARS |
| 31 | #endif |
| 32 | |
| 33 | #define ComputeBWRowBytes(width) (((unsigned)(width) + 7) >> 3) |
| 34 | |
| 35 | static const uint8_t* gBlackGammaTable; |
| 36 | static const uint8_t* gWhiteGammaTable; |
| 37 | |
| 38 | void SkGlyph::toMask(SkMask* mask) const { |
| 39 | SkASSERT(mask); |
| 40 | |
| 41 | mask->fImage = (uint8_t*)fImage; |
| 42 | mask->fBounds.set(fLeft, fTop, fLeft + fWidth, fTop + fHeight); |
| 43 | mask->fRowBytes = this->rowBytes(); |
| 44 | mask->fFormat = fMaskFormat; |
| 45 | } |
| 46 | |
| 47 | size_t SkGlyph::computeImageSize() const { |
| 48 | size_t size = this->rowBytes() * fHeight; |
| 49 | if (fMaskFormat == SkMask::k3D_Format) { |
| 50 | size *= 3; |
| 51 | } |
| 52 | return size; |
| 53 | } |
| 54 | |
| 55 | #ifdef SK_DEBUG |
| 56 | #define DUMP_RECx |
| 57 | #endif |
| 58 | |
| 59 | static SkFlattenable* load_flattenable(const SkDescriptor* desc, uint32_t tag) { |
| 60 | SkFlattenable* obj = NULL; |
| 61 | uint32_t len; |
| 62 | const void* data = desc->findEntry(tag, &len); |
| 63 | |
| 64 | if (data) { |
| 65 | SkFlattenableReadBuffer buffer(data, len); |
| 66 | obj = buffer.readFlattenable(); |
| 67 | SkASSERT(buffer.offset() == buffer.size()); |
| 68 | } |
| 69 | return obj; |
| 70 | } |
| 71 | |
| 72 | SkScalerContext::SkScalerContext(const SkDescriptor* desc) |
| 73 | : fPathEffect(NULL), fMaskFilter(NULL) |
| 74 | { |
| 75 | static bool gHaveGammaTables; |
| 76 | if (!gHaveGammaTables) { |
| 77 | const uint8_t* tables[2]; |
| 78 | SkFontHost::GetGammaTables(tables); |
| 79 | gBlackGammaTable = tables[0]; |
| 80 | gWhiteGammaTable = tables[1]; |
| 81 | gHaveGammaTables = true; |
| 82 | } |
| 83 | |
| 84 | fBaseGlyphCount = 0; |
| 85 | fAuxScalerContext = NULL; |
| 86 | |
| 87 | const Rec* rec = (const Rec*)desc->findEntry(kRec_SkDescriptorTag, NULL); |
| 88 | SkASSERT(rec); |
| 89 | |
| 90 | fRec = *rec; |
| 91 | |
| 92 | #ifdef DUMP_REC |
| 93 | desc->assertChecksum(); |
| 94 | SkDebugf("SkScalarContext checksum %x count %d length %d\n", desc->getChecksum(), desc->getCount(), desc->getLength()); |
| 95 | SkDebugf(" textsize %g prescale %g preskew %g post [%g %g %g %g]\n", |
| 96 | rec->fTextSize, rec->fPreScaleX, rec->fPreSkewX, rec->fPost2x2[0][0], |
| 97 | rec->fPost2x2[0][1], rec->fPost2x2[1][0], rec->fPost2x2[1][1]); |
| 98 | SkDebugf(" frame %g miter %g hints %d framefill %d format %d join %d\n", |
| 99 | rec->fFrameWidth, rec->fMiterLimit, rec->fHints, rec->fFrameAndFill, |
| 100 | rec->fMaskFormat, rec->fStrokeJoin); |
| 101 | SkDebugf(" pathEffect %x maskFilter %x\n", desc->findEntry(kPathEffect_SkDescriptorTag, NULL), |
| 102 | desc->findEntry(kMaskFilter_SkDescriptorTag, NULL)); |
| 103 | #endif |
| 104 | |
| 105 | fPathEffect = (SkPathEffect*)load_flattenable(desc, kPathEffect_SkDescriptorTag); |
| 106 | fMaskFilter = (SkMaskFilter*)load_flattenable(desc, kMaskFilter_SkDescriptorTag); |
| 107 | fRasterizer = (SkRasterizer*)load_flattenable(desc, kRasterizer_SkDescriptorTag); |
| 108 | } |
| 109 | |
| 110 | SkScalerContext::~SkScalerContext() { |
| 111 | fPathEffect->safeUnref(); |
| 112 | fMaskFilter->safeUnref(); |
| 113 | fRasterizer->safeUnref(); |
| 114 | |
| 115 | SkDELETE(fAuxScalerContext); |
| 116 | } |
| 117 | |
| 118 | SkScalerContext* SkScalerContext::loadAuxContext() const { |
| 119 | if (NULL == fAuxScalerContext) { |
| 120 | fAuxScalerContext = SkFontHost::CreateFallbackScalerContext(fRec); |
| 121 | if (NULL != fAuxScalerContext) { |
| 122 | fAuxScalerContext->setBaseGlyphCount(this->getGlyphCount()); |
| 123 | } |
| 124 | } |
| 125 | return fAuxScalerContext; |
| 126 | } |
| 127 | |
| 128 | #ifdef TRACK_MISSING_CHARS |
| 129 | static uint8_t gMissingChars[1 << 13]; |
| 130 | #endif |
| 131 | |
| 132 | uint16_t SkScalerContext::charToGlyphID(SkUnichar uni) { |
| 133 | unsigned glyphID = this->generateCharToGlyph(uni); |
| 134 | |
| 135 | if (0 == glyphID) { // try auxcontext |
| 136 | SkScalerContext* ctx = this->loadAuxContext(); |
| 137 | if (NULL != ctx) { |
| 138 | glyphID = ctx->generateCharToGlyph(uni); |
| 139 | if (0 != glyphID) { // only fiddle with it if its not missing |
| 140 | glyphID += this->getGlyphCount(); |
| 141 | if (glyphID > 0xFFFF) { |
| 142 | glyphID = 0; |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | #ifdef TRACK_MISSING_CHARS |
| 148 | if (0 == glyphID) { |
| 149 | bool announce = false; |
| 150 | if (uni > 0xFFFF) { // we don't record these |
| 151 | announce = true; |
| 152 | } else { |
| 153 | unsigned index = uni >> 3; |
| 154 | unsigned mask = 1 << (uni & 7); |
| 155 | SkASSERT(index < SK_ARRAY_COUNT(gMissingChars)); |
| 156 | if ((gMissingChars[index] & mask) == 0) { |
| 157 | gMissingChars[index] |= mask; |
| 158 | announce = true; |
| 159 | } |
| 160 | } |
| 161 | if (announce) { |
| 162 | printf(">>> MISSING CHAR <<< 0x%04X\n", uni); |
| 163 | } |
| 164 | } |
| 165 | #endif |
| 166 | return SkToU16(glyphID); |
| 167 | } |
| 168 | |
| 169 | /* Internal routine to resolve auxContextID into a real context. |
| 170 | Only makes sense to call once the glyph has been given a |
| 171 | valid auxGlyphID. |
| 172 | */ |
| 173 | SkScalerContext* SkScalerContext::getGlyphContext(const SkGlyph& glyph) const { |
| 174 | SkScalerContext* ctx = const_cast<SkScalerContext*>(this); |
| 175 | |
| 176 | if (glyph.getGlyphID() >= this->getGlyphCount()) { |
| 177 | ctx = this->loadAuxContext(); |
| 178 | if (NULL == ctx) { // if no aux, just return us |
| 179 | ctx = const_cast<SkScalerContext*>(this); |
| 180 | } |
| 181 | } |
| 182 | return ctx; |
| 183 | } |
| 184 | |
| 185 | static int plus_minus_pin(int value, int max) { |
| 186 | SkASSERT(max >= 0); |
| 187 | |
| 188 | if (value > max) { |
| 189 | value = max; |
| 190 | } else if (value < -max) { |
| 191 | value = -max; |
| 192 | } |
| 193 | return value; |
| 194 | } |
| 195 | |
| 196 | void SkScalerContext::getAdvance(SkGlyph* glyph) { |
| 197 | // mark us as just having a valid advance |
| 198 | glyph->fMaskFormat = MASK_FORMAT_JUST_ADVANCE; |
| 199 | // we mark the format before making the call, in case the impl |
| 200 | // internally ends up calling its generateMetrics, which is OK |
| 201 | // albeit slower than strictly necessary |
| 202 | this->getGlyphContext(*glyph)->generateAdvance(glyph); |
| 203 | } |
| 204 | |
| 205 | void SkScalerContext::getMetrics(SkGlyph* glyph) { |
| 206 | this->getGlyphContext(*glyph)->generateMetrics(glyph); |
| 207 | |
| 208 | // for now we have separate cache entries for devkerning on and off |
| 209 | // in the future we might share caches, but make our measure/draw |
| 210 | // code make the distinction. Thus we zap the values if the caller |
| 211 | // has not asked for them. |
| 212 | if ((fRec.fFlags & SkScalerContext::kDevKernText_Flag) == 0) { |
| 213 | // no devkern, so zap the fields |
| 214 | glyph->fLsbDelta = glyph->fRsbDelta = 0; |
| 215 | } |
| 216 | |
| 217 | // if either dimension is empty, zap the image bounds of the glyph |
| 218 | if (0 == glyph->fWidth || 0 == glyph->fHeight) { |
| 219 | glyph->fWidth = 0; |
| 220 | glyph->fHeight = 0; |
| 221 | glyph->fTop = 0; |
| 222 | glyph->fLeft = 0; |
| 223 | glyph->fMaskFormat = 0; |
| 224 | return; |
| 225 | } |
| 226 | |
| 227 | if (fRec.fFrameWidth > 0 || fPathEffect != NULL || fRasterizer != NULL) { |
| 228 | SkPath devPath, fillPath; |
| 229 | SkMatrix fillToDevMatrix; |
| 230 | |
| 231 | this->internalGetPath(*glyph, &fillPath, &devPath, &fillToDevMatrix); |
| 232 | |
| 233 | if (fRasterizer) { |
| 234 | SkMask mask; |
| 235 | |
| 236 | if (fRasterizer->rasterize(fillPath, fillToDevMatrix, NULL, |
| 237 | fMaskFilter, &mask, |
| 238 | SkMask::kJustComputeBounds_CreateMode)) { |
| 239 | glyph->fLeft = mask.fBounds.fLeft; |
| 240 | glyph->fTop = mask.fBounds.fTop; |
| 241 | glyph->fWidth = SkToU16(mask.fBounds.width()); |
| 242 | glyph->fHeight = SkToU16(mask.fBounds.height()); |
| 243 | } else { |
| 244 | // draw nothing 'cause we failed |
| 245 | glyph->fLeft = 0; |
| 246 | glyph->fTop = 0; |
| 247 | glyph->fWidth = 0; |
| 248 | glyph->fHeight = 0; |
| 249 | return; |
| 250 | } |
| 251 | } else { |
| 252 | // just use devPath |
| 253 | SkRect r; |
| 254 | SkIRect ir; |
| 255 | |
| 256 | devPath.computeBounds(&r, SkPath::kExact_BoundsType); |
| 257 | r.roundOut(&ir); |
| 258 | |
| 259 | glyph->fLeft = ir.fLeft; |
| 260 | glyph->fTop = ir.fTop; |
| 261 | glyph->fWidth = SkToU16(ir.width()); |
| 262 | glyph->fHeight = SkToU16(ir.height()); |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | glyph->fMaskFormat = fRec.fMaskFormat; |
| 267 | |
| 268 | if (fMaskFilter) { |
| 269 | SkMask src, dst; |
| 270 | SkMatrix matrix; |
| 271 | |
| 272 | glyph->toMask(&src); |
| 273 | fRec.getMatrixFrom2x2(&matrix); |
| 274 | |
| 275 | src.fImage = NULL; // only want the bounds from the filter |
| 276 | if (fMaskFilter->filterMask(&dst, src, matrix, NULL)) { |
| 277 | SkASSERT(dst.fImage == NULL); |
| 278 | glyph->fLeft = dst.fBounds.fLeft; |
| 279 | glyph->fTop = dst.fBounds.fTop; |
| 280 | glyph->fWidth = SkToU16(dst.fBounds.width()); |
| 281 | glyph->fHeight = SkToU16(dst.fBounds.height()); |
| 282 | glyph->fMaskFormat = dst.fFormat; |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | void SkScalerContext::getImage(const SkGlyph& origGlyph) { |
| 288 | const SkGlyph* glyph = &origGlyph; |
| 289 | SkGlyph tmpGlyph; |
| 290 | |
| 291 | if (fMaskFilter) { // restore the prefilter bounds |
| 292 | tmpGlyph.fID = origGlyph.fID; |
| 293 | |
| 294 | // need the original bounds, sans our maskfilter |
| 295 | SkMaskFilter* mf = fMaskFilter; |
| 296 | fMaskFilter = NULL; // temp disable |
| 297 | this->getMetrics(&tmpGlyph); |
| 298 | fMaskFilter = mf; // restore |
| 299 | |
| 300 | tmpGlyph.fImage = origGlyph.fImage; |
| 301 | |
| 302 | // we need the prefilter bounds to be <= filter bounds |
| 303 | SkASSERT(tmpGlyph.fWidth <= origGlyph.fWidth); |
| 304 | SkASSERT(tmpGlyph.fHeight <= origGlyph.fHeight); |
| 305 | glyph = &tmpGlyph; |
| 306 | } |
| 307 | |
| 308 | if (fRec.fFrameWidth > 0 || fPathEffect != NULL || fRasterizer != NULL) { |
| 309 | SkPath devPath, fillPath; |
| 310 | SkMatrix fillToDevMatrix; |
| 311 | |
| 312 | this->internalGetPath(*glyph, &fillPath, &devPath, &fillToDevMatrix); |
| 313 | |
| 314 | if (fRasterizer) { |
| 315 | SkMask mask; |
| 316 | |
| 317 | glyph->toMask(&mask); |
| 318 | mask.fFormat = SkMask::kA8_Format; |
| 319 | bzero(glyph->fImage, mask.computeImageSize()); |
| 320 | |
| 321 | if (!fRasterizer->rasterize(fillPath, fillToDevMatrix, NULL, |
| 322 | fMaskFilter, &mask, |
| 323 | SkMask::kJustRenderImage_CreateMode)) { |
| 324 | return; |
| 325 | } |
| 326 | } else { |
| 327 | SkBitmap bm; |
| 328 | SkBitmap::Config config; |
| 329 | SkMatrix matrix; |
| 330 | SkRegion clip; |
| 331 | SkPaint paint; |
| 332 | SkDraw draw; |
| 333 | |
| 334 | if (SkMask::kA8_Format == fRec.fMaskFormat) { |
| 335 | config = SkBitmap::kA8_Config; |
| 336 | paint.setAntiAlias(true); |
| 337 | } else { |
| 338 | SkASSERT(SkMask::kBW_Format == fRec.fMaskFormat); |
| 339 | config = SkBitmap::kA1_Config; |
| 340 | paint.setAntiAlias(false); |
| 341 | } |
| 342 | |
| 343 | clip.setRect(0, 0, glyph->fWidth, glyph->fHeight); |
| 344 | matrix.setTranslate(-SkIntToScalar(glyph->fLeft), |
| 345 | -SkIntToScalar(glyph->fTop)); |
| 346 | bm.setConfig(config, glyph->fWidth, glyph->fHeight, |
| 347 | glyph->rowBytes()); |
| 348 | bm.setPixels(glyph->fImage); |
| 349 | bzero(glyph->fImage, bm.height() * bm.rowBytes()); |
| 350 | |
| 351 | draw.fClip = &clip; |
| 352 | draw.fMatrix = &matrix; |
| 353 | draw.fBitmap = &bm; |
| 354 | draw.fBounder = NULL; |
| 355 | draw.drawPath(devPath, paint); |
| 356 | } |
| 357 | } else { |
| 358 | this->getGlyphContext(*glyph)->generateImage(*glyph); |
| 359 | } |
| 360 | |
| 361 | if (fMaskFilter) { |
| 362 | SkMask srcM, dstM; |
| 363 | SkMatrix matrix; |
| 364 | |
| 365 | // the src glyph image shouldn't be 3D |
| 366 | SkASSERT(SkMask::k3D_Format != glyph->fMaskFormat); |
| 367 | glyph->toMask(&srcM); |
| 368 | fRec.getMatrixFrom2x2(&matrix); |
| 369 | |
| 370 | if (fMaskFilter->filterMask(&dstM, srcM, matrix, NULL)) { |
| 371 | int width = SkFastMin32(origGlyph.fWidth, dstM.fBounds.width()); |
| 372 | int height = SkFastMin32(origGlyph.fHeight, dstM.fBounds.height()); |
| 373 | int dstRB = origGlyph.rowBytes(); |
| 374 | int srcRB = dstM.fRowBytes; |
| 375 | |
| 376 | const uint8_t* src = (const uint8_t*)dstM.fImage; |
| 377 | uint8_t* dst = (uint8_t*)origGlyph.fImage; |
| 378 | |
| 379 | if (SkMask::k3D_Format == dstM.fFormat) { |
| 380 | // we have to copy 3 times as much |
| 381 | height *= 3; |
| 382 | } |
| 383 | |
| 384 | // clean out our glyph, since it may be larger than dstM |
| 385 | //bzero(dst, height * dstRB); |
| 386 | |
| 387 | while (--height >= 0) { |
| 388 | memcpy(dst, src, width); |
| 389 | src += srcRB; |
| 390 | dst += dstRB; |
| 391 | } |
| 392 | SkMask::FreeImage(dstM.fImage); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | // check to see if we should filter the alpha channel |
| 397 | |
| 398 | if (NULL == fMaskFilter && |
| 399 | fRec.fMaskFormat != SkMask::kBW_Format && |
| 400 | (fRec.fFlags & (kGammaForBlack_Flag | kGammaForWhite_Flag)) != 0) |
| 401 | { |
| 402 | const uint8_t* table = (fRec.fFlags & kGammaForBlack_Flag) ? gBlackGammaTable : gWhiteGammaTable; |
| 403 | if (NULL != table) |
| 404 | { |
| 405 | uint8_t* dst = (uint8_t*)origGlyph.fImage; |
| 406 | unsigned rowBytes = origGlyph.rowBytes(); |
| 407 | |
| 408 | for (int y = origGlyph.fHeight - 1; y >= 0; --y) |
| 409 | { |
| 410 | for (int x = origGlyph.fWidth - 1; x >= 0; --x) |
| 411 | dst[x] = table[dst[x]]; |
| 412 | dst += rowBytes; |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | void SkScalerContext::getPath(const SkGlyph& glyph, SkPath* path) |
| 419 | { |
| 420 | this->internalGetPath(glyph, NULL, path, NULL); |
| 421 | } |
| 422 | |
| 423 | void SkScalerContext::getFontMetrics(SkPaint::FontMetrics* mx, SkPaint::FontMetrics* my) |
| 424 | { |
| 425 | this->generateFontMetrics(mx, my); |
| 426 | } |
| 427 | |
| 428 | /////////////////////////////////////////////////////////////////////// |
| 429 | |
| 430 | void SkScalerContext::internalGetPath(const SkGlyph& glyph, SkPath* fillPath, SkPath* devPath, SkMatrix* fillToDevMatrix) |
| 431 | { |
| 432 | SkPath path; |
| 433 | |
| 434 | this->getGlyphContext(glyph)->generatePath(glyph, &path); |
| 435 | |
| 436 | if (fRec.fFrameWidth > 0 || fPathEffect != NULL) |
| 437 | { |
| 438 | // need the path in user-space, with only the point-size applied |
| 439 | // so that our stroking and effects will operate the same way they |
| 440 | // would if the user had extracted the path themself, and then |
| 441 | // called drawPath |
| 442 | SkPath localPath; |
| 443 | SkMatrix matrix, inverse; |
| 444 | |
| 445 | fRec.getMatrixFrom2x2(&matrix); |
| 446 | matrix.invert(&inverse); |
| 447 | path.transform(inverse, &localPath); |
| 448 | // now localPath is only affected by the paint settings, and not the canvas matrix |
| 449 | |
| 450 | SkScalar width = fRec.fFrameWidth; |
| 451 | |
| 452 | if (fPathEffect) |
| 453 | { |
| 454 | SkPath effectPath; |
| 455 | |
| 456 | if (fPathEffect->filterPath(&effectPath, localPath, &width)) |
| 457 | localPath.swap(effectPath); |
| 458 | } |
| 459 | |
| 460 | if (width > 0) |
| 461 | { |
| 462 | SkStroke stroker; |
| 463 | SkPath outline; |
| 464 | |
| 465 | stroker.setWidth(width); |
| 466 | stroker.setMiterLimit(fRec.fMiterLimit); |
| 467 | stroker.setJoin((SkPaint::Join)fRec.fStrokeJoin); |
| 468 | stroker.setDoFill(SkToBool(fRec.fFlags & kFrameAndFill_Flag)); |
| 469 | stroker.strokePath(localPath, &outline); |
| 470 | localPath.swap(outline); |
| 471 | } |
| 472 | |
| 473 | // now return stuff to the caller |
| 474 | if (fillToDevMatrix) |
| 475 | *fillToDevMatrix = matrix; |
| 476 | |
| 477 | if (devPath) |
| 478 | localPath.transform(matrix, devPath); |
| 479 | |
| 480 | if (fillPath) |
| 481 | fillPath->swap(localPath); |
| 482 | } |
| 483 | else // nothing tricky to do |
| 484 | { |
| 485 | if (fillToDevMatrix) |
| 486 | fillToDevMatrix->reset(); |
| 487 | |
| 488 | if (devPath) |
| 489 | { |
| 490 | if (fillPath == NULL) |
| 491 | devPath->swap(path); |
| 492 | else |
| 493 | *devPath = path; |
| 494 | } |
| 495 | |
| 496 | if (fillPath) |
| 497 | fillPath->swap(path); |
| 498 | } |
| 499 | |
| 500 | if (devPath) |
| 501 | devPath->updateBoundsCache(); |
| 502 | if (fillPath) |
| 503 | fillPath->updateBoundsCache(); |
| 504 | } |
| 505 | |
| 506 | |
| 507 | void SkScalerContext::Rec::getMatrixFrom2x2(SkMatrix* dst) const |
| 508 | { |
| 509 | dst->reset(); |
| 510 | dst->setScaleX(fPost2x2[0][0]); |
| 511 | dst->setSkewX( fPost2x2[0][1]); |
| 512 | dst->setSkewY( fPost2x2[1][0]); |
| 513 | dst->setScaleY(fPost2x2[1][1]); |
| 514 | } |
| 515 | |
| 516 | void SkScalerContext::Rec::getLocalMatrix(SkMatrix* m) const |
| 517 | { |
| 518 | m->setScale(SkScalarMul(fTextSize, fPreScaleX), fTextSize); |
| 519 | if (fPreSkewX) |
| 520 | m->postSkew(fPreSkewX, 0); |
| 521 | } |
| 522 | |
| 523 | void SkScalerContext::Rec::getSingleMatrix(SkMatrix* m) const |
| 524 | { |
| 525 | this->getLocalMatrix(m); |
| 526 | |
| 527 | // now concat the device matrix |
| 528 | { |
| 529 | SkMatrix deviceMatrix; |
| 530 | this->getMatrixFrom2x2(&deviceMatrix); |
| 531 | m->postConcat(deviceMatrix); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | #include "SkFontHost.h" |
| 536 | |
| 537 | SkScalerContext* SkScalerContext::Create(const SkDescriptor* desc) |
| 538 | { |
| 539 | return SkFontHost::CreateScalerContext(desc); |
| 540 | } |
| 541 | |