| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkTextBlobRunIterator.h" |
| |
| #include "SkReadBuffer.h" |
| #include "SkTypeface.h" |
| #include "SkWriteBuffer.h" |
| |
| namespace { |
| |
| // TODO(fmalita): replace with SkFont. |
| class RunFont : SkNoncopyable { |
| public: |
| RunFont(const SkPaint& paint) |
| : fSize(paint.getTextSize()) |
| , fScaleX(paint.getTextScaleX()) |
| , fTypeface(SkSafeRef(paint.getTypeface())) |
| , fSkewX(paint.getTextSkewX()) |
| , fAlign(paint.getTextAlign()) |
| , fHinting(paint.getHinting()) |
| , fFlags(paint.getFlags() & kFlagsMask) { } |
| |
| void applyToPaint(SkPaint* paint) const { |
| paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| paint->setTypeface(fTypeface.get()); |
| paint->setTextSize(fSize); |
| paint->setTextScaleX(fScaleX); |
| paint->setTextSkewX(fSkewX); |
| paint->setTextAlign(static_cast<SkPaint::Align>(fAlign)); |
| paint->setHinting(static_cast<SkPaint::Hinting>(fHinting)); |
| |
| paint->setFlags((paint->getFlags() & ~kFlagsMask) | fFlags); |
| } |
| |
| bool operator==(const RunFont& other) const { |
| return fTypeface == other.fTypeface |
| && fSize == other.fSize |
| && fScaleX == other.fScaleX |
| && fSkewX == other.fSkewX |
| && fAlign == other.fAlign |
| && fHinting == other.fHinting |
| && fFlags == other.fFlags; |
| } |
| |
| bool operator!=(const RunFont& other) const { |
| return !(*this == other); |
| } |
| |
| uint32_t flags() const { return fFlags; } |
| |
| private: |
| const static uint32_t kFlagsMask = |
| SkPaint::kAntiAlias_Flag | |
| SkPaint::kUnderlineText_Flag | |
| SkPaint::kStrikeThruText_Flag | |
| SkPaint::kFakeBoldText_Flag | |
| SkPaint::kLinearText_Flag | |
| SkPaint::kSubpixelText_Flag | |
| SkPaint::kDevKernText_Flag | |
| SkPaint::kLCDRenderText_Flag | |
| SkPaint::kEmbeddedBitmapText_Flag | |
| SkPaint::kAutoHinting_Flag | |
| SkPaint::kVerticalText_Flag | |
| SkPaint::kGenA8FromLCD_Flag; |
| |
| SkScalar fSize; |
| SkScalar fScaleX; |
| |
| // Keep this SkAutoTUnref off the first position, to avoid interfering with SkNoncopyable |
| // empty baseclass optimization (http://code.google.com/p/skia/issues/detail?id=3694). |
| SkAutoTUnref<SkTypeface> fTypeface; |
| SkScalar fSkewX; |
| |
| static_assert(SkPaint::kAlignCount < 4, "insufficient_align_bits"); |
| uint32_t fAlign : 2; |
| static_assert(SkPaint::kFull_Hinting < 4, "insufficient_hinting_bits"); |
| uint32_t fHinting : 2; |
| static_assert((kFlagsMask & 0xffff) == kFlagsMask, "insufficient_flags_bits"); |
| uint32_t fFlags : 16; |
| |
| typedef SkNoncopyable INHERITED; |
| }; |
| |
| struct RunFontStorageEquivalent { |
| SkScalar fSize, fScaleX; |
| void* fTypeface; |
| SkScalar fSkewX; |
| uint32_t fFlags; |
| }; |
| static_assert(sizeof(RunFont) == sizeof(RunFontStorageEquivalent), "runfont_should_stay_packed"); |
| |
| } // anonymous namespace |
| |
| // |
| // Textblob data is laid out into externally-managed storage as follows: |
| // |
| // ----------------------------------------------------------------------------- |
| // | SkTextBlob | RunRecord | Glyphs[] | Pos[] | RunRecord | Glyphs[] | Pos[] | ... |
| // ----------------------------------------------------------------------------- |
| // |
| // Each run record describes a text blob run, and can be used to determine the (implicit) |
| // location of the following record. |
| |
| SkDEBUGCODE(static const unsigned kRunRecordMagic = 0xb10bcafe;) |
| |
| class SkTextBlob::RunRecord { |
| public: |
| RunRecord(uint32_t count, const SkPoint& offset, const SkPaint& font, GlyphPositioning pos) |
| : fFont(font) |
| , fCount(count) |
| , fOffset(offset) |
| , fPositioning(pos) { |
| SkDEBUGCODE(fMagic = kRunRecordMagic); |
| } |
| |
| uint32_t glyphCount() const { |
| return fCount; |
| } |
| |
| const SkPoint& offset() const { |
| return fOffset; |
| } |
| |
| const RunFont& font() const { |
| return fFont; |
| } |
| |
| GlyphPositioning positioning() const { |
| return fPositioning; |
| } |
| |
| uint16_t* glyphBuffer() const { |
| // Glyph are stored immediately following the record. |
| return reinterpret_cast<uint16_t*>(const_cast<RunRecord*>(this) + 1); |
| } |
| |
| SkScalar* posBuffer() const { |
| // Position scalars follow the (aligned) glyph buffer. |
| return reinterpret_cast<SkScalar*>(reinterpret_cast<uint8_t*>(this->glyphBuffer()) + |
| SkAlign4(fCount * sizeof(uint16_t))); |
| } |
| |
| static size_t StorageSize(int glyphCount, SkTextBlob::GlyphPositioning positioning) { |
| // RunRecord object + (aligned) glyph buffer + position buffer |
| return SkAlignPtr(sizeof(SkTextBlob::RunRecord) |
| + SkAlign4(glyphCount* sizeof(uint16_t)) |
| + glyphCount * sizeof(SkScalar) * ScalarsPerGlyph(positioning)); |
| } |
| |
| static const RunRecord* First(const SkTextBlob* blob) { |
| // The first record (if present) is stored following the blob object. |
| return reinterpret_cast<const RunRecord*>(blob + 1); |
| } |
| |
| static const RunRecord* Next(const RunRecord* run) { |
| return reinterpret_cast<const RunRecord*>(reinterpret_cast<const uint8_t*>(run) |
| + StorageSize(run->glyphCount(), run->positioning())); |
| } |
| |
| void validate(const uint8_t* storageTop) const { |
| SkASSERT(kRunRecordMagic == fMagic); |
| SkASSERT((uint8_t*)Next(this) <= storageTop); |
| SkASSERT(glyphBuffer() + fCount <= (uint16_t*)posBuffer()); |
| SkASSERT(posBuffer() + fCount * ScalarsPerGlyph(fPositioning) <= (SkScalar*)Next(this)); |
| } |
| |
| private: |
| friend class SkTextBlobBuilder; |
| |
| void grow(uint32_t count) { |
| SkScalar* initialPosBuffer = posBuffer(); |
| uint32_t initialCount = fCount; |
| fCount += count; |
| |
| // Move the initial pos scalars to their new location. |
| size_t copySize = initialCount * sizeof(SkScalar) * ScalarsPerGlyph(fPositioning); |
| SkASSERT((uint8_t*)posBuffer() + copySize <= (uint8_t*)Next(this)); |
| |
| // memmove, as the buffers may overlap |
| memmove(posBuffer(), initialPosBuffer, copySize); |
| } |
| |
| RunFont fFont; |
| uint32_t fCount; |
| SkPoint fOffset; |
| GlyphPositioning fPositioning; |
| |
| SkDEBUGCODE(unsigned fMagic;) |
| }; |
| |
| static int32_t gNextID = 1; |
| static int32_t next_id() { |
| int32_t id; |
| do { |
| id = sk_atomic_inc(&gNextID); |
| } while (id == SK_InvalidGenID); |
| return id; |
| } |
| |
| SkTextBlob::SkTextBlob(int runCount, const SkRect& bounds) |
| : fRunCount(runCount) |
| , fBounds(bounds) |
| , fUniqueID(next_id()) { |
| } |
| |
| SkTextBlob::~SkTextBlob() { |
| const RunRecord* run = RunRecord::First(this); |
| for (int i = 0; i < fRunCount; ++i) { |
| const RunRecord* nextRun = RunRecord::Next(run); |
| SkDEBUGCODE(run->validate((uint8_t*)this + fStorageSize);) |
| run->~RunRecord(); |
| run = nextRun; |
| } |
| } |
| |
| void SkTextBlob::flatten(SkWriteBuffer& buffer) const { |
| int runCount = fRunCount; |
| |
| buffer.write32(runCount); |
| buffer.writeRect(fBounds); |
| |
| SkPaint runPaint; |
| SkTextBlobRunIterator it(this); |
| while (!it.done()) { |
| SkASSERT(it.glyphCount() > 0); |
| |
| buffer.write32(it.glyphCount()); |
| buffer.write32(it.positioning()); |
| buffer.writePoint(it.offset()); |
| // This should go away when switching to SkFont |
| it.applyFontToPaint(&runPaint); |
| buffer.writePaint(runPaint); |
| |
| buffer.writeByteArray(it.glyphs(), it.glyphCount() * sizeof(uint16_t)); |
| buffer.writeByteArray(it.pos(), |
| it.glyphCount() * sizeof(SkScalar) * ScalarsPerGlyph(it.positioning())); |
| |
| it.next(); |
| SkDEBUGCODE(runCount--); |
| } |
| SkASSERT(0 == runCount); |
| } |
| |
| const SkTextBlob* SkTextBlob::CreateFromBuffer(SkReadBuffer& reader) { |
| int runCount = reader.read32(); |
| if (runCount < 0) { |
| return nullptr; |
| } |
| |
| SkRect bounds; |
| reader.readRect(&bounds); |
| |
| SkTextBlobBuilder blobBuilder; |
| for (int i = 0; i < runCount; ++i) { |
| int glyphCount = reader.read32(); |
| GlyphPositioning pos = static_cast<GlyphPositioning>(reader.read32()); |
| if (glyphCount <= 0 || pos > kFull_Positioning) { |
| return nullptr; |
| } |
| |
| SkPoint offset; |
| reader.readPoint(&offset); |
| SkPaint font; |
| reader.readPaint(&font); |
| |
| const SkTextBlobBuilder::RunBuffer* buf = nullptr; |
| switch (pos) { |
| case kDefault_Positioning: |
| buf = &blobBuilder.allocRun(font, glyphCount, offset.x(), offset.y(), &bounds); |
| break; |
| case kHorizontal_Positioning: |
| buf = &blobBuilder.allocRunPosH(font, glyphCount, offset.y(), &bounds); |
| break; |
| case kFull_Positioning: |
| buf = &blobBuilder.allocRunPos(font, glyphCount, &bounds); |
| break; |
| default: |
| return nullptr; |
| } |
| |
| if (!reader.readByteArray(buf->glyphs, glyphCount * sizeof(uint16_t)) || |
| !reader.readByteArray(buf->pos, |
| glyphCount * sizeof(SkScalar) * ScalarsPerGlyph(pos))) { |
| return nullptr; |
| } |
| } |
| |
| return blobBuilder.build(); |
| } |
| |
| unsigned SkTextBlob::ScalarsPerGlyph(GlyphPositioning pos) { |
| // GlyphPositioning values are directly mapped to scalars-per-glyph. |
| SkASSERT(pos <= 2); |
| return pos; |
| } |
| |
| SkTextBlobRunIterator::SkTextBlobRunIterator(const SkTextBlob* blob) |
| : fCurrentRun(SkTextBlob::RunRecord::First(blob)) |
| , fRemainingRuns(blob->fRunCount) { |
| SkDEBUGCODE(fStorageTop = (uint8_t*)blob + blob->fStorageSize;) |
| } |
| |
| bool SkTextBlobRunIterator::done() const { |
| return fRemainingRuns <= 0; |
| } |
| |
| void SkTextBlobRunIterator::next() { |
| SkASSERT(!this->done()); |
| |
| if (!this->done()) { |
| SkDEBUGCODE(fCurrentRun->validate(fStorageTop);) |
| fCurrentRun = SkTextBlob::RunRecord::Next(fCurrentRun); |
| fRemainingRuns--; |
| } |
| } |
| |
| uint32_t SkTextBlobRunIterator::glyphCount() const { |
| SkASSERT(!this->done()); |
| return fCurrentRun->glyphCount(); |
| } |
| |
| const uint16_t* SkTextBlobRunIterator::glyphs() const { |
| SkASSERT(!this->done()); |
| return fCurrentRun->glyphBuffer(); |
| } |
| |
| const SkScalar* SkTextBlobRunIterator::pos() const { |
| SkASSERT(!this->done()); |
| return fCurrentRun->posBuffer(); |
| } |
| |
| const SkPoint& SkTextBlobRunIterator::offset() const { |
| SkASSERT(!this->done()); |
| return fCurrentRun->offset(); |
| } |
| |
| SkTextBlob::GlyphPositioning SkTextBlobRunIterator::positioning() const { |
| SkASSERT(!this->done()); |
| return fCurrentRun->positioning(); |
| } |
| |
| void SkTextBlobRunIterator::applyFontToPaint(SkPaint* paint) const { |
| SkASSERT(!this->done()); |
| |
| fCurrentRun->font().applyToPaint(paint); |
| } |
| |
| bool SkTextBlobRunIterator::isLCD() const { |
| return SkToBool(fCurrentRun->font().flags() & SkPaint::kLCDRenderText_Flag); |
| } |
| |
| SkTextBlobBuilder::SkTextBlobBuilder() |
| : fStorageSize(0) |
| , fStorageUsed(0) |
| , fRunCount(0) |
| , fDeferredBounds(false) |
| , fLastRun(0) { |
| fBounds.setEmpty(); |
| } |
| |
| SkTextBlobBuilder::~SkTextBlobBuilder() { |
| if (nullptr != fStorage.get()) { |
| // We are abandoning runs and must destruct the associated font data. |
| // The easiest way to accomplish that is to use the blob destructor. |
| build()->unref(); |
| } |
| } |
| |
| SkRect SkTextBlobBuilder::TightRunBounds(const SkTextBlob::RunRecord& run) { |
| SkRect bounds; |
| SkPaint paint; |
| run.font().applyToPaint(&paint); |
| |
| if (SkTextBlob::kDefault_Positioning == run.positioning()) { |
| paint.measureText(run.glyphBuffer(), run.glyphCount() * sizeof(uint16_t), &bounds); |
| return bounds.makeOffset(run.offset().x(), run.offset().y()); |
| } |
| |
| SkAutoSTArray<16, SkRect> glyphBounds(run.glyphCount()); |
| paint.getTextWidths(run.glyphBuffer(), |
| run.glyphCount() * sizeof(uint16_t), |
| NULL, |
| glyphBounds.get()); |
| |
| SkASSERT(SkTextBlob::kFull_Positioning == run.positioning() || |
| SkTextBlob::kHorizontal_Positioning == run.positioning()); |
| // kFull_Positioning => [ x, y, x, y... ] |
| // kHorizontal_Positioning => [ x, x, x... ] |
| // (const y applied by runBounds.offset(run->offset()) later) |
| const SkScalar horizontalConstY = 0; |
| const SkScalar* glyphPosX = run.posBuffer(); |
| const SkScalar* glyphPosY = (run.positioning() == SkTextBlob::kFull_Positioning) ? |
| glyphPosX + 1 : &horizontalConstY; |
| const unsigned posXInc = SkTextBlob::ScalarsPerGlyph(run.positioning()); |
| const unsigned posYInc = (run.positioning() == SkTextBlob::kFull_Positioning) ? |
| posXInc : 0; |
| |
| bounds.setEmpty(); |
| for (unsigned i = 0; i < run.glyphCount(); ++i) { |
| bounds.join(glyphBounds[i].makeOffset(*glyphPosX, *glyphPosY)); |
| glyphPosX += posXInc; |
| glyphPosY += posYInc; |
| } |
| |
| SkASSERT((void*)glyphPosX <= SkTextBlob::RunRecord::Next(&run)); |
| |
| return bounds.makeOffset(run.offset().x(), run.offset().y()); |
| } |
| |
| SkRect SkTextBlobBuilder::ConservativeRunBounds(const SkTextBlob::RunRecord& run) { |
| SkASSERT(run.glyphCount() > 0); |
| SkASSERT(SkTextBlob::kFull_Positioning == run.positioning() || |
| SkTextBlob::kHorizontal_Positioning == run.positioning()); |
| |
| SkPaint paint; |
| run.font().applyToPaint(&paint); |
| const SkRect fontBounds = paint.getFontBounds(); |
| if (fontBounds.isEmpty()) { |
| // Empty font bounds are likely a font bug. TightBounds has a better chance of |
| // producing useful results in this case. |
| return TightRunBounds(run); |
| } |
| |
| // Compute the glyph position bbox. |
| SkRect bounds; |
| switch (run.positioning()) { |
| case SkTextBlob::kHorizontal_Positioning: { |
| const SkScalar* glyphPos = run.posBuffer(); |
| SkASSERT((void*)(glyphPos + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); |
| |
| SkScalar minX = *glyphPos; |
| SkScalar maxX = *glyphPos; |
| for (unsigned i = 1; i < run.glyphCount(); ++i) { |
| SkScalar x = glyphPos[i]; |
| minX = SkMinScalar(x, minX); |
| maxX = SkMaxScalar(x, maxX); |
| } |
| |
| bounds.setLTRB(minX, 0, maxX, 0); |
| } break; |
| case SkTextBlob::kFull_Positioning: { |
| const SkPoint* glyphPosPts = reinterpret_cast<const SkPoint*>(run.posBuffer()); |
| SkASSERT((void*)(glyphPosPts + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); |
| |
| bounds.setBounds(glyphPosPts, run.glyphCount()); |
| } break; |
| default: |
| SkFAIL("unsupported positioning mode"); |
| } |
| |
| // Expand by typeface glyph bounds. |
| bounds.fLeft += fontBounds.left(); |
| bounds.fTop += fontBounds.top(); |
| bounds.fRight += fontBounds.right(); |
| bounds.fBottom += fontBounds.bottom(); |
| |
| // Offset by run position. |
| return bounds.makeOffset(run.offset().x(), run.offset().y()); |
| } |
| |
| void SkTextBlobBuilder::updateDeferredBounds() { |
| SkASSERT(!fDeferredBounds || fRunCount > 0); |
| |
| if (!fDeferredBounds) { |
| return; |
| } |
| |
| SkASSERT(fLastRun >= sizeof(SkTextBlob)); |
| SkTextBlob::RunRecord* run = reinterpret_cast<SkTextBlob::RunRecord*>(fStorage.get() + |
| fLastRun); |
| |
| // FIXME: we should also use conservative bounds for kDefault_Positioning. |
| SkRect runBounds = SkTextBlob::kDefault_Positioning == run->positioning() ? |
| TightRunBounds(*run) : ConservativeRunBounds(*run); |
| fBounds.join(runBounds); |
| fDeferredBounds = false; |
| } |
| |
| void SkTextBlobBuilder::reserve(size_t size) { |
| // We don't currently pre-allocate, but maybe someday... |
| if (fStorageUsed + size <= fStorageSize) { |
| return; |
| } |
| |
| if (0 == fRunCount) { |
| SkASSERT(nullptr == fStorage.get()); |
| SkASSERT(0 == fStorageSize); |
| SkASSERT(0 == fStorageUsed); |
| |
| // the first allocation also includes blob storage |
| fStorageUsed += sizeof(SkTextBlob); |
| } |
| |
| fStorageSize = fStorageUsed + size; |
| // FYI: This relies on everything we store being relocatable, particularly SkPaint. |
| fStorage.realloc(fStorageSize); |
| } |
| |
| bool SkTextBlobBuilder::mergeRun(const SkPaint &font, SkTextBlob::GlyphPositioning positioning, |
| int count, SkPoint offset) { |
| if (0 == fLastRun) { |
| SkASSERT(0 == fRunCount); |
| return false; |
| } |
| |
| SkASSERT(fLastRun >= sizeof(SkTextBlob)); |
| SkTextBlob::RunRecord* run = reinterpret_cast<SkTextBlob::RunRecord*>(fStorage.get() + |
| fLastRun); |
| SkASSERT(run->glyphCount() > 0); |
| |
| if (run->positioning() != positioning |
| || run->font() != font |
| || (run->glyphCount() + count < run->glyphCount())) { |
| return false; |
| } |
| |
| // we can merge same-font/same-positioning runs in the following cases: |
| // * fully positioned run following another fully positioned run |
| // * horizontally postioned run following another horizontally positioned run with the same |
| // y-offset |
| if (SkTextBlob::kFull_Positioning != positioning |
| && (SkTextBlob::kHorizontal_Positioning != positioning |
| || run->offset().y() != offset.y())) { |
| return false; |
| } |
| |
| size_t sizeDelta = SkTextBlob::RunRecord::StorageSize(run->glyphCount() + count, positioning) - |
| SkTextBlob::RunRecord::StorageSize(run->glyphCount(), positioning); |
| this->reserve(sizeDelta); |
| |
| // reserve may have realloced |
| run = reinterpret_cast<SkTextBlob::RunRecord*>(fStorage.get() + fLastRun); |
| uint32_t preMergeCount = run->glyphCount(); |
| run->grow(count); |
| |
| // Callers expect the buffers to point at the newly added slice, ant not at the beginning. |
| fCurrentRunBuffer.glyphs = run->glyphBuffer() + preMergeCount; |
| fCurrentRunBuffer.pos = run->posBuffer() |
| + preMergeCount * SkTextBlob::ScalarsPerGlyph(positioning); |
| |
| fStorageUsed += sizeDelta; |
| |
| SkASSERT(fStorageUsed <= fStorageSize); |
| run->validate(fStorage.get() + fStorageUsed); |
| |
| return true; |
| } |
| |
| void SkTextBlobBuilder::allocInternal(const SkPaint &font, |
| SkTextBlob::GlyphPositioning positioning, |
| int count, SkPoint offset, const SkRect* bounds) { |
| SkASSERT(count > 0); |
| SkASSERT(SkPaint::kGlyphID_TextEncoding == font.getTextEncoding()); |
| |
| if (!this->mergeRun(font, positioning, count, offset)) { |
| this->updateDeferredBounds(); |
| |
| size_t runSize = SkTextBlob::RunRecord::StorageSize(count, positioning); |
| this->reserve(runSize); |
| |
| SkASSERT(fStorageUsed >= sizeof(SkTextBlob)); |
| SkASSERT(fStorageUsed + runSize <= fStorageSize); |
| |
| SkTextBlob::RunRecord* run = new (fStorage.get() + fStorageUsed) |
| SkTextBlob::RunRecord(count, offset, font, positioning); |
| |
| fCurrentRunBuffer.glyphs = run->glyphBuffer(); |
| fCurrentRunBuffer.pos = run->posBuffer(); |
| |
| fLastRun = fStorageUsed; |
| fStorageUsed += runSize; |
| fRunCount++; |
| |
| SkASSERT(fStorageUsed <= fStorageSize); |
| run->validate(fStorage.get() + fStorageUsed); |
| } |
| |
| if (!fDeferredBounds) { |
| if (bounds) { |
| fBounds.join(*bounds); |
| } else { |
| fDeferredBounds = true; |
| } |
| } |
| } |
| |
| const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRun(const SkPaint& font, int count, |
| SkScalar x, SkScalar y, |
| const SkRect* bounds) { |
| this->allocInternal(font, SkTextBlob::kDefault_Positioning, count, SkPoint::Make(x, y), bounds); |
| |
| return fCurrentRunBuffer; |
| } |
| |
| const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunPosH(const SkPaint& font, int count, |
| SkScalar y, |
| const SkRect* bounds) { |
| this->allocInternal(font, SkTextBlob::kHorizontal_Positioning, count, SkPoint::Make(0, y), |
| bounds); |
| |
| return fCurrentRunBuffer; |
| } |
| |
| const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunPos(const SkPaint& font, int count, |
| const SkRect *bounds) { |
| this->allocInternal(font, SkTextBlob::kFull_Positioning, count, SkPoint::Make(0, 0), bounds); |
| |
| return fCurrentRunBuffer; |
| } |
| |
| const SkTextBlob* SkTextBlobBuilder::build() { |
| SkASSERT((fRunCount > 0) == (nullptr != fStorage.get())); |
| |
| this->updateDeferredBounds(); |
| |
| if (0 == fRunCount) { |
| SkASSERT(nullptr == fStorage.get()); |
| fStorageUsed = sizeof(SkTextBlob); |
| fStorage.realloc(fStorageUsed); |
| } |
| |
| const SkTextBlob* blob = new (fStorage.detach()) SkTextBlob(fRunCount, fBounds); |
| SkDEBUGCODE(const_cast<SkTextBlob*>(blob)->fStorageSize = fStorageSize;) |
| |
| SkDEBUGCODE( |
| size_t validateSize = sizeof(SkTextBlob); |
| const SkTextBlob::RunRecord* run = SkTextBlob::RunRecord::First(blob); |
| for (int i = 0; i < fRunCount; ++i) { |
| validateSize += SkTextBlob::RunRecord::StorageSize(run->fCount, run->fPositioning); |
| run->validate(reinterpret_cast<const uint8_t*>(blob) + fStorageUsed); |
| run = SkTextBlob::RunRecord::Next(run); |
| } |
| SkASSERT(validateSize == fStorageUsed); |
| ) |
| |
| fStorageUsed = 0; |
| fStorageSize = 0; |
| fRunCount = 0; |
| fLastRun = 0; |
| fBounds.setEmpty(); |
| |
| return blob; |
| } |
| |
