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