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/*
* 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 <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) {
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);
addFont(typeface, style);
return true;
} else {
ALOGD("failed to analyze style");
}
return false;
}
void FontFamily::addFont(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
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