mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
c31e388345
These changes were supposed to be committed in the previous patch "Better refcounting and locking" but seem to have gotten lost in a rebase. It fixes a memory leak and some possible race conditions. Change-Id: I54ca1e37500ec49756fe317cc6d6d03da9911501
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2013 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 "Minikin"
|
|
|
|
#include <cutils/log.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
#include "MinikinInternal.h"
|
|
#include <minikin/MinikinFont.h>
|
|
#include <minikin/AnalyzeStyle.h>
|
|
#include <minikin/FontFamily.h>
|
|
#include <UniquePtr.h>
|
|
|
|
using std::vector;
|
|
|
|
namespace android {
|
|
|
|
FontFamily::~FontFamily() {
|
|
for (size_t i = 0; i < mFonts.size(); i++) {
|
|
mFonts[i].typeface->UnrefLocked();
|
|
}
|
|
}
|
|
|
|
bool FontFamily::addFont(MinikinFont* typeface) {
|
|
AutoMutex _l(gMinikinLock);
|
|
const uint32_t os2Tag = MinikinFont::MakeTag('O', 'S', '/', '2');
|
|
size_t os2Size = 0;
|
|
bool ok = typeface->GetTable(os2Tag, NULL, &os2Size);
|
|
if (!ok) return false;
|
|
UniquePtr<uint8_t[]> os2Data(new uint8_t[os2Size]);
|
|
ok = typeface->GetTable(os2Tag, os2Data.get(), &os2Size);
|
|
if (!ok) return false;
|
|
int weight;
|
|
bool italic;
|
|
if (analyzeStyle(os2Data.get(), os2Size, &weight, &italic)) {
|
|
//ALOGD("analyzed weight = %d, italic = %s", weight, italic ? "true" : "false");
|
|
FontStyle style(weight, italic);
|
|
addFontLocked(typeface, style);
|
|
return true;
|
|
} else {
|
|
ALOGD("failed to analyze style");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void FontFamily::addFont(MinikinFont* typeface, FontStyle style) {
|
|
AutoMutex _l(gMinikinLock);
|
|
addFontLocked(typeface, style);
|
|
}
|
|
|
|
void FontFamily::addFontLocked(MinikinFont* typeface, FontStyle style) { typeface->RefLocked();
|
|
mFonts.push_back(Font(typeface, style));
|
|
}
|
|
|
|
// Compute a matching metric between two styles - 0 is an exact match
|
|
int computeMatch(FontStyle style1, FontStyle style2) {
|
|
if (style1 == style2) return 0;
|
|
int score = abs(style1.getWeight() - style2.getWeight());
|
|
if (style1.getItalic() != style2.getItalic()) {
|
|
score += 2;
|
|
}
|
|
return score;
|
|
}
|
|
|
|
MinikinFont* FontFamily::getClosestMatch(FontStyle style) const {
|
|
const Font* bestFont = NULL;
|
|
int bestMatch = 0;
|
|
for (size_t i = 0; i < mFonts.size(); i++) {
|
|
const Font& font = mFonts[i];
|
|
int match = computeMatch(font.style, style);
|
|
if (i == 0 || match < bestMatch) {
|
|
bestFont = &font;
|
|
bestMatch = match;
|
|
}
|
|
}
|
|
return bestFont == NULL ? NULL : bestFont->typeface;
|
|
}
|
|
|
|
size_t FontFamily::getNumFonts() const {
|
|
return mFonts.size();
|
|
}
|
|
|
|
MinikinFont* FontFamily::getFont(size_t index) const {
|
|
return mFonts[index].typeface;
|
|
}
|
|
|
|
FontStyle FontFamily::getStyle(size_t index) const {
|
|
return mFonts[index].style;
|
|
}
|
|
|
|
} // namespace android
|