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author | 2010-12-22 21:39:39 +0000 | |
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committer | 2010-12-22 21:39:39 +0000 | |
commit | ac10a2d039c5d52eed66e27cbbc503ab523c1cd5 (patch) | |
tree | c5be0c3dd15052016e7d32f376507cb1ea7101dd /gpu/src/GrTextStrike_impl.h | |
parent | ea8509cd3b1771b36054313d3ccd56679df56044 (diff) |
add gpu backend (not hooked up yet)
git-svn-id: http://skia.googlecode.com/svn/trunk@649 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'gpu/src/GrTextStrike_impl.h')
-rw-r--r-- | gpu/src/GrTextStrike_impl.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/gpu/src/GrTextStrike_impl.h b/gpu/src/GrTextStrike_impl.h new file mode 100644 index 0000000000..7e03e2aff4 --- /dev/null +++ b/gpu/src/GrTextStrike_impl.h @@ -0,0 +1,113 @@ +/* + Copyright 2010 Google Inc. + + 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. + */ + + +#ifndef GrTextStrike_impl_DEFINED +#define GrTextStrike_impl_DEFINED + +class GrFontCache::Key { +public: + Key(GrFontScaler* scaler) { + fFontScalerKey = scaler->getKey(); + } + + uint32_t getHash() const { return fFontScalerKey->getHash(); } + + static bool LT(const GrTextStrike& strike, const Key& key) { + return *strike.getFontScalerKey() < *key.fFontScalerKey; + } + static bool EQ(const GrTextStrike& strike, const Key& key) { + return *strike.getFontScalerKey() == *key.fFontScalerKey; + } + +private: + const GrKey* fFontScalerKey; +}; + +void GrFontCache::detachStrikeFromList(GrTextStrike* strike) { + if (strike->fPrev) { + GrAssert(fHead != strike); + strike->fPrev->fNext = strike->fNext; + } else { + GrAssert(fHead == strike); + fHead = strike->fNext; + } + + if (strike->fNext) { + GrAssert(fTail != strike); + strike->fNext->fPrev = strike->fPrev; + } else { + GrAssert(fTail == strike); + fTail = strike->fPrev; + } +} + +GrTextStrike* GrFontCache::getStrike(GrFontScaler* scaler) { + this->validate(); + + Key key(scaler); + GrTextStrike* strike = fCache.find(key); + if (NULL == strike) { + strike = this->generateStrike(scaler, key); + } else if (strike->fPrev) { + // Need to put the strike at the head of its dllist, since that is how + // we age the strikes for purging (we purge from the back of the list + this->detachStrikeFromList(strike); + // attach at the head + fHead->fPrev = strike; + strike->fNext = fHead; + strike->fPrev = NULL; + fHead = strike; + } + + this->validate(); + return strike; +} + +/////////////////////////////////////////////////////////////////////////////// + +/** + * This Key just wraps a glyphID, and matches the protocol need for + * GrTHashTable + */ +class GrTextStrike::Key { +public: + Key(GrGlyph::PackedID id) : fPackedID(id) {} + + uint32_t getHash() const { return fPackedID; } + + static bool LT(const GrGlyph& glyph, const Key& key) { + return glyph.fPackedID < key.fPackedID; + } + static bool EQ(const GrGlyph& glyph, const Key& key) { + return glyph.fPackedID == key.fPackedID; + } + +private: + GrGlyph::PackedID fPackedID; +}; + +GrGlyph* GrTextStrike::getGlyph(GrGlyph::PackedID packed, + GrFontScaler* scaler) { + GrGlyph* glyph = fCache.find(packed); + if (NULL == glyph) { + glyph = this->generateGlyph(packed, scaler); + } + return glyph; +} + +#endif + |