/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkTypeface_remote.h"
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#include "SkPaint.h"
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#include "SkRemoteGlyphCache.h"
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#include "SkStrike.h"
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#include "SkStrikeCache.h"
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#include "SkTraceEvent.h"
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SkScalerContextProxy::SkScalerContextProxy(sk_sp<SkTypeface> tf,
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const SkScalerContextEffects& effects,
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const SkDescriptor* desc,
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sk_sp<SkStrikeClient::DiscardableHandleManager> manager)
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: SkScalerContext{std::move(tf), effects, desc}
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, fDiscardableManager{std::move(manager)} {}
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void SkScalerContextProxy::initCache(SkStrike* cache, SkStrikeCache* strikeCache) {
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SkASSERT(fCache == nullptr);
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SkASSERT(cache != nullptr);
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fCache = cache;
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fStrikeCache = strikeCache;
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}
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unsigned SkScalerContextProxy::generateGlyphCount() {
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SK_ABORT("Should never be called.");
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return 0;
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}
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uint16_t SkScalerContextProxy::generateCharToGlyph(SkUnichar) {
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SK_ABORT("Should never be called.");
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return 0;
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}
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bool SkScalerContextProxy::generateAdvance(SkGlyph* glyph) {
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return false;
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}
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void SkScalerContextProxy::generateMetrics(SkGlyph* glyph) {
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TRACE_EVENT1("skia", "generateMetrics", "rec", TRACE_STR_COPY(this->getRec().dump().c_str()));
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if (this->getProxyTypeface()->isLogging()) {
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SkDebugf("GlyphCacheMiss generateMetrics: %s\n", this->getRec().dump().c_str());
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}
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glyph->fMaskFormat = fRec.fMaskFormat;
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// Since the scaler context is being called, we don't have the needed data. Try to find a
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// fallback before failing.
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if (fCache && fCache->belongsToCache(glyph)) {
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// First check the original cache, in case there is a sub-pixel pos mismatch.
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if (const auto* fallback =
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fCache->getCachedGlyphAnySubPix(glyph->getGlyphID(), glyph->getPackedID())) {
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fCache->initializeGlyphFromFallback(glyph, *fallback);
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fDiscardableManager->notifyCacheMiss(
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SkStrikeClient::CacheMissType::kGlyphMetricsFallback);
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return;
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}
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// Now check other caches for a desc mismatch.
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if (fStrikeCache->desperationSearchForImage(fCache->getDescriptor(), glyph, fCache)) {
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fDiscardableManager->notifyCacheMiss(
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SkStrikeClient::CacheMissType::kGlyphMetricsFallback);
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return;
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}
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}
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glyph->zeroMetrics();
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fDiscardableManager->notifyCacheMiss(SkStrikeClient::CacheMissType::kGlyphMetrics);
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}
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void SkScalerContextProxy::generateImage(const SkGlyph& glyph) {
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TRACE_EVENT1("skia", "generateImage", "rec", TRACE_STR_COPY(this->getRec().dump().c_str()));
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if (this->getProxyTypeface()->isLogging()) {
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SkDebugf("GlyphCacheMiss generateImage: %s\n", this->getRec().dump().c_str());
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}
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// There is no desperation search here, because if there was an image to be found it was
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// copied over with the metrics search.
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fDiscardableManager->notifyCacheMiss(SkStrikeClient::CacheMissType::kGlyphImage);
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}
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bool SkScalerContextProxy::generatePath(SkGlyphID glyphID, SkPath* path) {
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TRACE_EVENT1("skia", "generatePath", "rec", TRACE_STR_COPY(this->getRec().dump().c_str()));
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if (this->getProxyTypeface()->isLogging()) {
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SkDebugf("GlyphCacheMiss generatePath: %s\n", this->getRec().dump().c_str());
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}
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// Since the scaler context is being called, we don't have the needed data. Try to find a
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// fallback before failing.
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auto desc = SkScalerContext::DescriptorGivenRecAndEffects(this->getRec(), this->getEffects());
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bool foundPath = fStrikeCache && fStrikeCache->desperationSearchForPath(*desc, glyphID, path);
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fDiscardableManager->notifyCacheMiss(foundPath
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? SkStrikeClient::CacheMissType::kGlyphPathFallback
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: SkStrikeClient::CacheMissType::kGlyphPath);
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return foundPath;
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}
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void SkScalerContextProxy::generateFontMetrics(SkFontMetrics* metrics) {
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TRACE_EVENT1(
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"skia", "generateFontMetrics", "rec", TRACE_STR_COPY(this->getRec().dump().c_str()));
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if (this->getProxyTypeface()->isLogging()) {
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SkDebugf("GlyphCacheMiss generateFontMetrics: %s\n", this->getRec().dump().c_str());
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SkDEBUGCODE(SkStrikeCache::Dump());
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}
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// Font metrics aren't really used for render, so just zero out the data and return.
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fDiscardableManager->notifyCacheMiss(SkStrikeClient::CacheMissType::kFontMetrics);
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sk_bzero(metrics, sizeof(*metrics));
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}
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SkTypefaceProxy* SkScalerContextProxy::getProxyTypeface() const {
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return (SkTypefaceProxy*)this->getTypeface();
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}
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