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Issue #80 - Split out GetShapedWord template function

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Moonchild 2020-05-13 14:36:06 +00:00 • committed by Roy Tam
commit 9e45084e77
4 changed files with 84 additions and 64 deletions
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80
gfx/thebes/gfxFont-Impl.h Normal file
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GFX_FONT_IMPL_H
#define GFX_FONT_IMPL_H
#ifdef __GNUC__
#define GFX_MAYBE_UNUSED __attribute__((unused))
#else
#define GFX_MAYBE_UNUSED
#endif
template<typename T>
gfxShapedWord*
gfxFont::GetShapedWord(DrawTarget *aDrawTarget,
const T *aText,
uint32_t aLength,
uint32_t aHash,
Script aRunScript,
bool aVertical,
int32_t aAppUnitsPerDevUnit,
uint32_t aFlags,
gfxTextPerfMetrics *aTextPerf GFX_MAYBE_UNUSED)
{
// if the cache is getting too big, flush it and start over
uint32_t wordCacheMaxEntries =
gfxPlatform::GetPlatform()->WordCacheMaxEntries();
if (mWordCache->Count() > wordCacheMaxEntries) {
NS_WARNING("flushing shaped-word cache");
ClearCachedWords();
}
// if there's a cached entry for this word, just return it
CacheHashKey key(aText, aLength, aHash,
aRunScript,
aAppUnitsPerDevUnit,
aFlags);
CacheHashEntry *entry = mWordCache->PutEntry(key);
if (!entry) {
NS_WARNING("failed to create word cache entry - expect missing text");
return nullptr;
}
gfxShapedWord* sw = entry->mShapedWord.get();
if (sw) {
sw->ResetAge();
#ifndef RELEASE_OR_BETA
if (aTextPerf) {
aTextPerf->current.wordCacheHit++;
}
#endif
return sw;
}
#ifndef RELEASE_OR_BETA
if (aTextPerf) {
aTextPerf->current.wordCacheMiss++;
}
#endif
sw = gfxShapedWord::Create(aText, aLength, aRunScript, aAppUnitsPerDevUnit,
aFlags);
entry->mShapedWord.reset(sw);
if (!sw) {
NS_WARNING("failed to create gfxShapedWord - expect missing text");
return nullptr;
}
DebugOnly<bool> ok =
ShapeText(aDrawTarget, aText, 0, aLength, aRunScript, aVertical, sw);
NS_WARNING_ASSERTION(ok, "failed to shape word - expect garbled text");
return sw;
}
#endif // GFX_FONT_IMPL_H