| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "TextLayoutCache" |
| |
| #include "TextLayoutCache.h" |
| #include "TextLayout.h" |
| #include "SkFontHost.h" |
| |
| extern "C" { |
| #include "harfbuzz-unicode.h" |
| } |
| |
| namespace android { |
| |
| //-------------------------------------------------------------------------------------------------- |
| #define TYPEFACE_ARABIC "/system/fonts/DroidNaskh-Regular.ttf" |
| #define TYPE_FACE_HEBREW_REGULAR "/system/fonts/DroidSansHebrew-Regular.ttf" |
| #define TYPE_FACE_HEBREW_BOLD "/system/fonts/DroidSansHebrew-Bold.ttf" |
| |
| #if USE_TEXT_LAYOUT_CACHE |
| |
| ANDROID_SINGLETON_STATIC_INSTANCE(TextLayoutCache); |
| |
| #endif |
| |
| ANDROID_SINGLETON_STATIC_INSTANCE(TextLayoutEngine); |
| |
| //-------------------------------------------------------------------------------------------------- |
| |
| TextLayoutCache::TextLayoutCache() : |
| mCache(GenerationCache<TextLayoutCacheKey, sp<TextLayoutCacheValue> >::kUnlimitedCapacity), |
| mSize(0), mMaxSize(MB(DEFAULT_TEXT_LAYOUT_CACHE_SIZE_IN_MB)), |
| mCacheHitCount(0), mNanosecondsSaved(0) { |
| init(); |
| } |
| |
| TextLayoutCache::~TextLayoutCache() { |
| mCache.clear(); |
| } |
| |
| void TextLayoutCache::init() { |
| mCache.setOnEntryRemovedListener(this); |
| |
| mDebugLevel = readRtlDebugLevel(); |
| mDebugEnabled = mDebugLevel & kRtlDebugCaches; |
| LOGD("Using debug level = %d - Debug Enabled = %d", mDebugLevel, mDebugEnabled); |
| |
| mCacheStartTime = systemTime(SYSTEM_TIME_MONOTONIC); |
| |
| if (mDebugEnabled) { |
| LOGD("Initialization is done - Start time = %lld", mCacheStartTime); |
| } |
| |
| mInitialized = true; |
| } |
| |
| /** |
| * Callbacks |
| */ |
| void TextLayoutCache::operator()(TextLayoutCacheKey& text, sp<TextLayoutCacheValue>& desc) { |
| size_t totalSizeToDelete = text.getSize() + desc->getSize(); |
| mSize -= totalSizeToDelete; |
| if (mDebugEnabled) { |
| LOGD("Cache value %p deleted, size = %d", desc.get(), totalSizeToDelete); |
| } |
| } |
| |
| /* |
| * Cache clearing |
| */ |
| void TextLayoutCache::clear() { |
| mCache.clear(); |
| } |
| |
| /* |
| * Caching |
| */ |
| sp<TextLayoutCacheValue> TextLayoutCache::getValue(SkPaint* paint, |
| const jchar* text, jint start, jint count, jint contextCount, jint dirFlags) { |
| AutoMutex _l(mLock); |
| nsecs_t startTime = 0; |
| if (mDebugEnabled) { |
| startTime = systemTime(SYSTEM_TIME_MONOTONIC); |
| } |
| |
| // Create the key |
| TextLayoutCacheKey key(paint, text, start, count, contextCount, dirFlags); |
| |
| // Get value from cache if possible |
| sp<TextLayoutCacheValue> value = mCache.get(key); |
| |
| // Value not found for the key, we need to add a new value in the cache |
| if (value == NULL) { |
| if (mDebugEnabled) { |
| startTime = systemTime(SYSTEM_TIME_MONOTONIC); |
| } |
| |
| value = new TextLayoutCacheValue(contextCount); |
| |
| // Compute advances and store them |
| TextLayoutEngine::getInstance().computeValues(value.get(), paint, |
| reinterpret_cast<const UChar*>(text), start, count, |
| size_t(contextCount), int(dirFlags)); |
| |
| if (mDebugEnabled) { |
| value->setElapsedTime(systemTime(SYSTEM_TIME_MONOTONIC) - startTime); |
| } |
| |
| // Don't bother to add in the cache if the entry is too big |
| size_t size = key.getSize() + value->getSize(); |
| if (size <= mMaxSize) { |
| // Cleanup to make some room if needed |
| if (mSize + size > mMaxSize) { |
| if (mDebugEnabled) { |
| LOGD("Need to clean some entries for making some room for a new entry"); |
| } |
| while (mSize + size > mMaxSize) { |
| // This will call the callback |
| bool removedOne = mCache.removeOldest(); |
| LOG_ALWAYS_FATAL_IF(!removedOne, "The cache is non-empty but we " |
| "failed to remove the oldest entry. " |
| "mSize = %u, size = %u, mMaxSize = %u, mCache.size() = %u", |
| mSize, size, mMaxSize, mCache.size()); |
| } |
| } |
| |
| // Update current cache size |
| mSize += size; |
| |
| // Copy the text when we insert the new entry |
| key.internalTextCopy(); |
| |
| bool putOne = mCache.put(key, value); |
| LOG_ALWAYS_FATAL_IF(!putOne, "Failed to put an entry into the cache. " |
| "This indicates that the cache already has an entry with the " |
| "same key but it should not since we checked earlier!" |
| " - start = %d, count = %d, contextCount = %d - Text = '%s'", |
| start, count, contextCount, String8(text + start, count).string()); |
| |
| if (mDebugEnabled) { |
| nsecs_t totalTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime; |
| LOGD("CACHE MISS: Added entry %p " |
| "with start = %d, count = %d, contextCount = %d, " |
| "entry size %d bytes, remaining space %d bytes" |
| " - Compute time %0.6f ms - Put time %0.6f ms - Text = '%s'", |
| value.get(), start, count, contextCount, size, mMaxSize - mSize, |
| value->getElapsedTime() * 0.000001f, |
| (totalTime - value->getElapsedTime()) * 0.000001f, |
| String8(text + start, count).string()); |
| } |
| } else { |
| if (mDebugEnabled) { |
| LOGD("CACHE MISS: Calculated but not storing entry because it is too big " |
| "with start = %d, count = %d, contextCount = %d, " |
| "entry size %d bytes, remaining space %d bytes" |
| " - Compute time %0.6f ms - Text = '%s'", |
| start, count, contextCount, size, mMaxSize - mSize, |
| value->getElapsedTime() * 0.000001f, |
| String8(text + start, count).string()); |
| } |
| value.clear(); |
| } |
| } else { |
| // This is a cache hit, just log timestamp and user infos |
| if (mDebugEnabled) { |
| nsecs_t elapsedTimeThruCacheGet = systemTime(SYSTEM_TIME_MONOTONIC) - startTime; |
| mNanosecondsSaved += (value->getElapsedTime() - elapsedTimeThruCacheGet); |
| ++mCacheHitCount; |
| |
| if (value->getElapsedTime() > 0) { |
| float deltaPercent = 100 * ((value->getElapsedTime() - elapsedTimeThruCacheGet) |
| / ((float)value->getElapsedTime())); |
| LOGD("CACHE HIT #%d with start = %d, count = %d, contextCount = %d" |
| "- Compute time %0.6f ms - " |
| "Cache get time %0.6f ms - Gain in percent: %2.2f - Text = '%s'", |
| mCacheHitCount, start, count, contextCount, |
| value->getElapsedTime() * 0.000001f, |
| elapsedTimeThruCacheGet * 0.000001f, |
| deltaPercent, |
| String8(text + start, count).string()); |
| } |
| if (mCacheHitCount % DEFAULT_DUMP_STATS_CACHE_HIT_INTERVAL == 0) { |
| dumpCacheStats(); |
| } |
| } |
| } |
| return value; |
| } |
| |
| void TextLayoutCache::dumpCacheStats() { |
| float remainingPercent = 100 * ((mMaxSize - mSize) / ((float)mMaxSize)); |
| float timeRunningInSec = (systemTime(SYSTEM_TIME_MONOTONIC) - mCacheStartTime) / 1000000000; |
| |
| size_t bytes = 0; |
| size_t cacheSize = mCache.size(); |
| for (size_t i = 0; i < cacheSize; i++) { |
| bytes += mCache.getKeyAt(i).getSize() + mCache.getValueAt(i)->getSize(); |
| } |
| |
| LOGD("------------------------------------------------"); |
| LOGD("Cache stats"); |
| LOGD("------------------------------------------------"); |
| LOGD("pid : %d", getpid()); |
| LOGD("running : %.0f seconds", timeRunningInSec); |
| LOGD("entries : %d", cacheSize); |
| LOGD("max size : %d bytes", mMaxSize); |
| LOGD("used : %d bytes according to mSize, %d bytes actual", mSize, bytes); |
| LOGD("remaining : %d bytes or %2.2f percent", mMaxSize - mSize, remainingPercent); |
| LOGD("hits : %d", mCacheHitCount); |
| LOGD("saved : %0.6f ms", mNanosecondsSaved * 0.000001f); |
| LOGD("------------------------------------------------"); |
| } |
| |
| /** |
| * TextLayoutCacheKey |
| */ |
| TextLayoutCacheKey::TextLayoutCacheKey(): text(NULL), start(0), count(0), contextCount(0), |
| dirFlags(0), typeface(NULL), textSize(0), textSkewX(0), textScaleX(0), flags(0), |
| hinting(SkPaint::kNo_Hinting) { |
| } |
| |
| TextLayoutCacheKey::TextLayoutCacheKey(const SkPaint* paint, const UChar* text, |
| size_t start, size_t count, size_t contextCount, int dirFlags) : |
| text(text), start(start), count(count), contextCount(contextCount), |
| dirFlags(dirFlags) { |
| typeface = paint->getTypeface(); |
| textSize = paint->getTextSize(); |
| textSkewX = paint->getTextSkewX(); |
| textScaleX = paint->getTextScaleX(); |
| flags = paint->getFlags(); |
| hinting = paint->getHinting(); |
| } |
| |
| TextLayoutCacheKey::TextLayoutCacheKey(const TextLayoutCacheKey& other) : |
| text(NULL), |
| textCopy(other.textCopy), |
| start(other.start), |
| count(other.count), |
| contextCount(other.contextCount), |
| dirFlags(other.dirFlags), |
| typeface(other.typeface), |
| textSize(other.textSize), |
| textSkewX(other.textSkewX), |
| textScaleX(other.textScaleX), |
| flags(other.flags), |
| hinting(other.hinting) { |
| if (other.text) { |
| textCopy.setTo(other.text, other.contextCount); |
| } |
| } |
| |
| int TextLayoutCacheKey::compare(const TextLayoutCacheKey& lhs, const TextLayoutCacheKey& rhs) { |
| int deltaInt = lhs.start - rhs.start; |
| if (deltaInt != 0) return (deltaInt); |
| |
| deltaInt = lhs.count - rhs.count; |
| if (deltaInt != 0) return (deltaInt); |
| |
| deltaInt = lhs.contextCount - rhs.contextCount; |
| if (deltaInt != 0) return (deltaInt); |
| |
| if (lhs.typeface < rhs.typeface) return -1; |
| if (lhs.typeface > rhs.typeface) return +1; |
| |
| if (lhs.textSize < rhs.textSize) return -1; |
| if (lhs.textSize > rhs.textSize) return +1; |
| |
| if (lhs.textSkewX < rhs.textSkewX) return -1; |
| if (lhs.textSkewX > rhs.textSkewX) return +1; |
| |
| if (lhs.textScaleX < rhs.textScaleX) return -1; |
| if (lhs.textScaleX > rhs.textScaleX) return +1; |
| |
| deltaInt = lhs.flags - rhs.flags; |
| if (deltaInt != 0) return (deltaInt); |
| |
| deltaInt = lhs.hinting - rhs.hinting; |
| if (deltaInt != 0) return (deltaInt); |
| |
| deltaInt = lhs.dirFlags - rhs.dirFlags; |
| if (deltaInt) return (deltaInt); |
| |
| return memcmp(lhs.getText(), rhs.getText(), lhs.contextCount * sizeof(UChar)); |
| } |
| |
| void TextLayoutCacheKey::internalTextCopy() { |
| textCopy.setTo(text, contextCount); |
| text = NULL; |
| } |
| |
| size_t TextLayoutCacheKey::getSize() const { |
| return sizeof(TextLayoutCacheKey) + sizeof(UChar) * contextCount; |
| } |
| |
| /** |
| * TextLayoutCacheValue |
| */ |
| TextLayoutCacheValue::TextLayoutCacheValue(size_t contextCount) : |
| mTotalAdvance(0), mElapsedTime(0) { |
| // Give a hint for advances and glyphs vectors size |
| mAdvances.setCapacity(contextCount); |
| mGlyphs.setCapacity(contextCount); |
| } |
| |
| size_t TextLayoutCacheValue::getSize() const { |
| return sizeof(TextLayoutCacheValue) + sizeof(jfloat) * mAdvances.capacity() + |
| sizeof(jchar) * mGlyphs.capacity(); |
| } |
| |
| void TextLayoutCacheValue::setElapsedTime(uint32_t time) { |
| mElapsedTime = time; |
| } |
| |
| uint32_t TextLayoutCacheValue::getElapsedTime() { |
| return mElapsedTime; |
| } |
| |
| TextLayoutEngine::TextLayoutEngine() : mShaperItemGlyphArraySize(0) { |
| mDefaultTypeface = SkFontHost::CreateTypeface(NULL, NULL, NULL, 0, SkTypeface::kNormal); |
| mArabicTypeface = NULL; |
| mHebrewRegularTypeface = NULL; |
| mHebrewBoldTypeface = NULL; |
| |
| mFontRec.klass = &harfbuzzSkiaClass; |
| mFontRec.userData = 0; |
| |
| // The values which harfbuzzSkiaClass returns are already scaled to |
| // pixel units, so we just set all these to one to disable further |
| // scaling. |
| mFontRec.x_ppem = 1; |
| mFontRec.y_ppem = 1; |
| mFontRec.x_scale = 1; |
| mFontRec.y_scale = 1; |
| |
| memset(&mShaperItem, 0, sizeof(mShaperItem)); |
| |
| mShaperItem.font = &mFontRec; |
| mShaperItem.font->userData = &mShapingPaint; |
| } |
| |
| TextLayoutEngine::~TextLayoutEngine() { |
| // FIXME should free fonts and caches but since this class is a singleton, |
| // we don't bother at the moment |
| } |
| |
| void TextLayoutEngine::computeValues(TextLayoutCacheValue* value, SkPaint* paint, const UChar* chars, |
| size_t start, size_t count, size_t contextCount, int dirFlags) { |
| |
| computeValues(paint, chars, start, count, contextCount, dirFlags, |
| &value->mAdvances, &value->mTotalAdvance, &value->mGlyphs); |
| #if DEBUG_ADVANCES |
| LOGD("Advances - start = %d, count = %d, contextCount = %d, totalAdvance = %f", start, count, |
| contextCount, value->mTotalAdvance); |
| #endif |
| } |
| |
| void TextLayoutEngine::computeValues(SkPaint* paint, const UChar* chars, |
| size_t start, size_t count, size_t contextCount, int dirFlags, |
| Vector<jfloat>* const outAdvances, jfloat* outTotalAdvance, |
| Vector<jchar>* const outGlyphs) { |
| if (!count) { |
| *outTotalAdvance = 0; |
| return; |
| } |
| |
| UBiDiLevel bidiReq = 0; |
| bool forceLTR = false; |
| bool forceRTL = false; |
| |
| switch (dirFlags) { |
| case kBidi_LTR: bidiReq = 0; break; // no ICU constant, canonical LTR level |
| case kBidi_RTL: bidiReq = 1; break; // no ICU constant, canonical RTL level |
| case kBidi_Default_LTR: bidiReq = UBIDI_DEFAULT_LTR; break; |
| case kBidi_Default_RTL: bidiReq = UBIDI_DEFAULT_RTL; break; |
| case kBidi_Force_LTR: forceLTR = true; break; // every char is LTR |
| case kBidi_Force_RTL: forceRTL = true; break; // every char is RTL |
| } |
| |
| bool useSingleRun = false; |
| bool isRTL = forceRTL; |
| if (forceLTR || forceRTL) { |
| useSingleRun = true; |
| } else { |
| UBiDi* bidi = ubidi_open(); |
| if (bidi) { |
| UErrorCode status = U_ZERO_ERROR; |
| #if DEBUG_GLYPHS |
| LOGD("******** ComputeValues -- start"); |
| LOGD(" -- string = '%s'", String8(chars + start, count).string()); |
| LOGD(" -- start = %d", start); |
| LOGD(" -- count = %d", count); |
| LOGD(" -- contextCount = %d", contextCount); |
| LOGD(" -- bidiReq = %d", bidiReq); |
| #endif |
| ubidi_setPara(bidi, chars, contextCount, bidiReq, NULL, &status); |
| if (U_SUCCESS(status)) { |
| int paraDir = ubidi_getParaLevel(bidi) & kDirection_Mask; // 0 if ltr, 1 if rtl |
| ssize_t rc = ubidi_countRuns(bidi, &status); |
| #if DEBUG_GLYPHS |
| LOGD(" -- dirFlags = %d", dirFlags); |
| LOGD(" -- paraDir = %d", paraDir); |
| LOGD(" -- run-count = %d", int(rc)); |
| #endif |
| if (U_SUCCESS(status) && rc == 1) { |
| // Normal case: one run, status is ok |
| isRTL = (paraDir == 1); |
| useSingleRun = true; |
| } else if (!U_SUCCESS(status) || rc < 1) { |
| LOGW("Need to force to single run -- string = '%s'," |
| " status = %d, rc = %d", |
| String8(chars + start, count).string(), status, int(rc)); |
| isRTL = (paraDir == 1); |
| useSingleRun = true; |
| } else { |
| int32_t end = start + count; |
| for (size_t i = 0; i < size_t(rc); ++i) { |
| int32_t startRun = -1; |
| int32_t lengthRun = -1; |
| UBiDiDirection runDir = ubidi_getVisualRun(bidi, i, &startRun, &lengthRun); |
| |
| if (startRun == -1 || lengthRun == -1) { |
| // Something went wrong when getting the visual run, need to clear |
| // already computed data before doing a single run pass |
| LOGW("Visual run is not valid"); |
| outGlyphs->clear(); |
| outAdvances->clear(); |
| *outTotalAdvance = 0; |
| isRTL = (paraDir == 1); |
| useSingleRun = true; |
| break; |
| } |
| |
| if (startRun >= end) { |
| continue; |
| } |
| int32_t endRun = startRun + lengthRun; |
| if (endRun <= int32_t(start)) { |
| continue; |
| } |
| if (startRun < int32_t(start)) { |
| startRun = int32_t(start); |
| } |
| if (endRun > end) { |
| endRun = end; |
| } |
| |
| lengthRun = endRun - startRun; |
| isRTL = (runDir == UBIDI_RTL); |
| jfloat runTotalAdvance = 0; |
| #if DEBUG_GLYPHS |
| LOGD("Processing Bidi Run = %d -- run-start = %d, run-len = %d, isRTL = %d", |
| i, startRun, lengthRun, isRTL); |
| #endif |
| computeRunValues(paint, chars + startRun, lengthRun, isRTL, |
| outAdvances, &runTotalAdvance, outGlyphs); |
| |
| *outTotalAdvance += runTotalAdvance; |
| } |
| } |
| } else { |
| LOGW("Cannot set Para"); |
| useSingleRun = true; |
| isRTL = (bidiReq = 1) || (bidiReq = UBIDI_DEFAULT_RTL); |
| } |
| ubidi_close(bidi); |
| } else { |
| LOGW("Cannot ubidi_open()"); |
| useSingleRun = true; |
| isRTL = (bidiReq = 1) || (bidiReq = UBIDI_DEFAULT_RTL); |
| } |
| } |
| |
| // Default single run case |
| if (useSingleRun){ |
| #if DEBUG_GLYPHS |
| LOGD("Using a SINGLE BiDi Run " |
| "-- run-start = %d, run-len = %d, isRTL = %d", start, count, isRTL); |
| #endif |
| computeRunValues(paint, chars + start, count, isRTL, |
| outAdvances, outTotalAdvance, outGlyphs); |
| } |
| |
| #if DEBUG_GLYPHS |
| LOGD(" -- Total returned glyphs-count = %d", outGlyphs->size()); |
| LOGD("******** ComputeValues -- end"); |
| #endif |
| } |
| |
| static void logGlyphs(HB_ShaperItem shaperItem) { |
| LOGD(" -- glyphs count=%d", shaperItem.num_glyphs); |
| for (size_t i = 0; i < shaperItem.num_glyphs; i++) { |
| LOGD(" -- glyph[%d] = %d, offset.x = %f, offset.y = %f", i, shaperItem.glyphs[i], |
| HBFixedToFloat(shaperItem.offsets[i].x), |
| HBFixedToFloat(shaperItem.offsets[i].y)); |
| } |
| } |
| |
| void TextLayoutEngine::computeRunValues(SkPaint* paint, const UChar* chars, |
| size_t count, bool isRTL, |
| Vector<jfloat>* const outAdvances, jfloat* outTotalAdvance, |
| Vector<jchar>* const outGlyphs) { |
| if (!count) { |
| // We cannot shape an empty run. |
| *outTotalAdvance = 0; |
| return; |
| } |
| |
| // Set the string properties |
| mShaperItem.string = chars; |
| mShaperItem.stringLength = count; |
| |
| // Define shaping paint properties |
| mShapingPaint.setTextSize(paint->getTextSize()); |
| mShapingPaint.setTextSkewX(paint->getTextSkewX()); |
| mShapingPaint.setTextScaleX(paint->getTextScaleX()); |
| mShapingPaint.setFlags(paint->getFlags()); |
| mShapingPaint.setHinting(paint->getHinting()); |
| |
| // Split the BiDi run into Script runs. Harfbuzz will populate the pos, length and script |
| // into the shaperItem |
| ssize_t indexFontRun = isRTL ? count - 1 : 0; |
| unsigned numCodePoints = 0; |
| jfloat totalAdvance = 0; |
| while ((isRTL) ? |
| hb_utf16_script_run_prev(&numCodePoints, &mShaperItem.item, chars, |
| count, &indexFontRun): |
| hb_utf16_script_run_next(&numCodePoints, &mShaperItem.item, chars, |
| count, &indexFontRun)) { |
| |
| ssize_t startScriptRun = mShaperItem.item.pos; |
| size_t countScriptRun = mShaperItem.item.length; |
| ssize_t endScriptRun = startScriptRun + countScriptRun; |
| |
| #if DEBUG_GLYPHS |
| LOGD("-------- Start of Script Run --------"); |
| LOGD("Shaping Script Run with"); |
| LOGD(" -- isRTL = %d", isRTL); |
| LOGD(" -- HB script = %d", mShaperItem.item.script); |
| LOGD(" -- startFontRun = %d", int(startScriptRun)); |
| LOGD(" -- endFontRun = %d", int(endScriptRun)); |
| LOGD(" -- countFontRun = %d", countScriptRun); |
| LOGD(" -- run = '%s'", String8(chars + startScriptRun, countScriptRun).string()); |
| LOGD(" -- string = '%s'", String8(chars, count).string()); |
| #endif |
| |
| // Initialize Harfbuzz Shaper and get the base glyph count for offsetting the glyphIDs |
| // and shape the Font run |
| size_t glyphBaseCount = shapeFontRun(paint, isRTL); |
| |
| #if DEBUG_GLYPHS |
| LOGD("Got from Harfbuzz"); |
| LOGD(" -- glyphBaseCount = %d", glyphBaseCount); |
| LOGD(" -- num_glypth = %d", mShaperItem.num_glyphs); |
| LOGD(" -- kerning_applied = %d", mShaperItem.kerning_applied); |
| LOGD(" -- isDevKernText = %d", paint->isDevKernText()); |
| |
| logGlyphs(mShaperItem); |
| #endif |
| if (isRTL) { |
| endScriptRun = startScriptRun; |
| #if DEBUG_GLYPHS |
| LOGD("Updated endScriptRun = %d", int(endScriptRun)); |
| #endif |
| } else { |
| startScriptRun = endScriptRun; |
| #if DEBUG_GLYPHS |
| LOGD("Updated startScriptRun = %d", int(startScriptRun)); |
| #endif |
| } |
| |
| if (mShaperItem.advances == NULL || mShaperItem.num_glyphs == 0) { |
| #if DEBUG_GLYPHS |
| LOGD("Advances array is empty or num_glypth = 0"); |
| #endif |
| outAdvances->insertAt(0, outAdvances->size(), countScriptRun); |
| continue; |
| } |
| |
| // Get Advances and their total |
| jfloat currentAdvance = HBFixedToFloat(mShaperItem.advances[mShaperItem.log_clusters[0]]); |
| jfloat totalFontRunAdvance = currentAdvance; |
| outAdvances->add(currentAdvance); |
| for (size_t i = 1; i < countScriptRun; i++) { |
| size_t clusterPrevious = mShaperItem.log_clusters[i - 1]; |
| size_t cluster = mShaperItem.log_clusters[i]; |
| if (cluster == clusterPrevious) { |
| outAdvances->add(0); |
| } else { |
| currentAdvance = HBFixedToFloat(mShaperItem.advances[mShaperItem.log_clusters[i]]); |
| totalFontRunAdvance += currentAdvance; |
| outAdvances->add(currentAdvance); |
| } |
| } |
| |
| totalAdvance += totalFontRunAdvance; |
| |
| #if DEBUG_ADVANCES |
| LOGD("Returned advances"); |
| for (size_t i = 0; i < countScriptRun; i++) { |
| LOGD(" -- hb-adv[%d] = %f, log_clusters = %d, total = %f", i, |
| (*outAdvances)[i], mShaperItem.log_clusters[i], totalFontRunAdvance); |
| } |
| #endif |
| |
| // Get Glyphs and reverse them in place if RTL |
| if (outGlyphs) { |
| size_t countGlyphs = mShaperItem.num_glyphs; |
| #if DEBUG_GLYPHS |
| LOGD("Returned script run glyphs -- count = %d", countGlyphs); |
| #endif |
| for (size_t i = 0; i < countGlyphs; i++) { |
| jchar glyph = glyphBaseCount + |
| (jchar) mShaperItem.glyphs[(!isRTL) ? i : countGlyphs - 1 - i]; |
| #if DEBUG_GLYPHS |
| LOGD(" -- glyph[%d] = %d", i, glyph); |
| #endif |
| outGlyphs->add(glyph); |
| } |
| } |
| } |
| |
| *outTotalAdvance = totalAdvance; |
| |
| #if DEBUG_GLYPHS |
| LOGD("-------- End of Script Run --------"); |
| #endif |
| } |
| |
| |
| size_t TextLayoutEngine::shapeFontRun(SkPaint* paint, bool isRTL) { |
| // Reset kerning |
| mShaperItem.kerning_applied = false; |
| |
| // Update Harfbuzz Shaper |
| mShaperItem.item.bidiLevel = isRTL; |
| |
| SkTypeface* typeface = paint->getTypeface(); |
| |
| // Set the correct Typeface depending on the script |
| switch (mShaperItem.item.script) { |
| case HB_Script_Arabic: |
| typeface = getCachedTypeface(&mArabicTypeface, TYPEFACE_ARABIC); |
| #if DEBUG_GLYPHS |
| LOGD("Using Arabic Typeface"); |
| #endif |
| break; |
| |
| case HB_Script_Hebrew: |
| if (typeface) { |
| switch (typeface->style()) { |
| case SkTypeface::kBold: |
| case SkTypeface::kBoldItalic: |
| typeface = getCachedTypeface(&mHebrewBoldTypeface, TYPE_FACE_HEBREW_BOLD); |
| #if DEBUG_GLYPHS |
| LOGD("Using Hebrew Bold/BoldItalic Typeface"); |
| #endif |
| break; |
| |
| case SkTypeface::kNormal: |
| case SkTypeface::kItalic: |
| default: |
| typeface = getCachedTypeface(&mHebrewRegularTypeface, TYPE_FACE_HEBREW_REGULAR); |
| #if DEBUG_GLYPHS |
| LOGD("Using Hebrew Regular/Italic Typeface"); |
| #endif |
| break; |
| } |
| } else { |
| typeface = getCachedTypeface(&mHebrewRegularTypeface, TYPE_FACE_HEBREW_REGULAR); |
| #if DEBUG_GLYPHS |
| LOGD("Using Hebrew Regular Typeface"); |
| #endif |
| } |
| break; |
| |
| default: |
| if (!typeface) { |
| typeface = mDefaultTypeface; |
| #if DEBUG_GLYPHS |
| LOGD("Using Default Typeface"); |
| #endif |
| } else { |
| #if DEBUG_GLYPHS |
| LOGD("Using Paint Typeface"); |
| #endif |
| } |
| break; |
| } |
| |
| mShapingPaint.setTypeface(typeface); |
| mShaperItem.face = getCachedHBFace(typeface); |
| |
| #if DEBUG_GLYPHS |
| LOGD("Run typeface = %p, uniqueID = %d, hb_face = %p", |
| typeface, typeface->uniqueID(), mShaperItem.face); |
| #endif |
| |
| // Get the glyphs base count for offsetting the glyphIDs returned by Harfbuzz |
| // This is needed as the Typeface used for shaping can be not the default one |
| // when we are shaping any script that needs to use a fallback Font. |
| // If we are a "common" script we dont need to shift |
| size_t baseGlyphCount = 0; |
| switch (mShaperItem.item.script) { |
| case HB_Script_Arabic: |
| case HB_Script_Hebrew: { |
| const uint16_t* text16 = (const uint16_t*)mShaperItem.string; |
| SkUnichar firstUnichar = SkUTF16_NextUnichar(&text16); |
| baseGlyphCount = paint->getBaseGlyphCount(firstUnichar); |
| break; |
| } |
| default: |
| break; |
| } |
| |
| // Shape |
| assert(mShaperItem.item.length > 0); // Harfbuzz will overwrite other memory if length is 0. |
| ensureShaperItemGlyphArrays(mShaperItem.item.length * 3 / 2); |
| mShaperItem.num_glyphs = mShaperItemGlyphArraySize; |
| while (!HB_ShapeItem(&mShaperItem)) { |
| // We overflowed our glyph arrays. Resize and retry. |
| // HB_ShapeItem fills in shaperItem.num_glyphs with the needed size. |
| ensureShaperItemGlyphArrays(mShaperItem.num_glyphs * 2); |
| mShaperItem.num_glyphs = mShaperItemGlyphArraySize; |
| } |
| return baseGlyphCount; |
| } |
| |
| void TextLayoutEngine::ensureShaperItemGlyphArrays(size_t size) { |
| if (size > mShaperItemGlyphArraySize) { |
| deleteShaperItemGlyphArrays(); |
| createShaperItemGlyphArrays(size); |
| } |
| } |
| |
| void TextLayoutEngine::createShaperItemGlyphArrays(size_t size) { |
| #if DEBUG_GLYPHS |
| LOGD("Creating Glyph Arrays with size = %d", size); |
| #endif |
| mShaperItemGlyphArraySize = size; |
| |
| // These arrays are all indexed by glyph. |
| mShaperItem.glyphs = new HB_Glyph[size]; |
| mShaperItem.attributes = new HB_GlyphAttributes[size]; |
| mShaperItem.advances = new HB_Fixed[size]; |
| mShaperItem.offsets = new HB_FixedPoint[size]; |
| |
| // Although the log_clusters array is indexed by character, Harfbuzz expects that |
| // it is big enough to hold one element per glyph. So we allocate log_clusters along |
| // with the other glyph arrays above. |
| mShaperItem.log_clusters = new unsigned short[size]; |
| } |
| |
| void TextLayoutEngine::deleteShaperItemGlyphArrays() { |
| delete[] mShaperItem.glyphs; |
| delete[] mShaperItem.attributes; |
| delete[] mShaperItem.advances; |
| delete[] mShaperItem.offsets; |
| delete[] mShaperItem.log_clusters; |
| } |
| |
| SkTypeface* TextLayoutEngine::getCachedTypeface(SkTypeface** typeface, const char path[]) { |
| if (!*typeface) { |
| *typeface = SkTypeface::CreateFromFile(path); |
| (*typeface)->ref(); |
| #if DEBUG_GLYPHS |
| LOGD("Created SkTypeface from file '%s' with uniqueID = %d", path, (*typeface)->uniqueID()); |
| #endif |
| } |
| return *typeface; |
| } |
| |
| HB_Face TextLayoutEngine::getCachedHBFace(SkTypeface* typeface) { |
| SkFontID fontId = typeface->uniqueID(); |
| ssize_t index = mCachedHBFaces.indexOfKey(fontId); |
| if (index >= 0) { |
| return mCachedHBFaces.valueAt(index); |
| } |
| HB_Face face = HB_NewFace(typeface, harfbuzzSkiaGetTable); |
| if (face) { |
| #if DEBUG_GLYPHS |
| LOGD("Created HB_NewFace %p from paint typeface = %p", face, typeface); |
| #endif |
| mCachedHBFaces.add(fontId, face); |
| } |
| return face; |
| } |
| |
| } // namespace android |