FontFamily.cpp revision c31e3883456e018d742e9f29815ba5ff8b315ea1
1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "Minikin" 18 19#include <cutils/log.h> 20#include <stdlib.h> 21#include <stdint.h> 22 23#include "MinikinInternal.h" 24#include <minikin/MinikinFont.h> 25#include <minikin/AnalyzeStyle.h> 26#include <minikin/FontFamily.h> 27#include <UniquePtr.h> 28 29using std::vector; 30 31namespace android { 32 33FontFamily::~FontFamily() { 34 for (size_t i = 0; i < mFonts.size(); i++) { 35 mFonts[i].typeface->UnrefLocked(); 36 } 37} 38 39bool FontFamily::addFont(MinikinFont* typeface) { 40 AutoMutex _l(gMinikinLock); 41 const uint32_t os2Tag = MinikinFont::MakeTag('O', 'S', '/', '2'); 42 size_t os2Size = 0; 43 bool ok = typeface->GetTable(os2Tag, NULL, &os2Size); 44 if (!ok) return false; 45 UniquePtr<uint8_t[]> os2Data(new uint8_t[os2Size]); 46 ok = typeface->GetTable(os2Tag, os2Data.get(), &os2Size); 47 if (!ok) return false; 48 int weight; 49 bool italic; 50 if (analyzeStyle(os2Data.get(), os2Size, &weight, &italic)) { 51 //ALOGD("analyzed weight = %d, italic = %s", weight, italic ? "true" : "false"); 52 FontStyle style(weight, italic); 53 addFontLocked(typeface, style); 54 return true; 55 } else { 56 ALOGD("failed to analyze style"); 57 } 58 return false; 59} 60 61void FontFamily::addFont(MinikinFont* typeface, FontStyle style) { 62 AutoMutex _l(gMinikinLock); 63 addFontLocked(typeface, style); 64} 65 66void FontFamily::addFontLocked(MinikinFont* typeface, FontStyle style) { typeface->RefLocked(); 67 mFonts.push_back(Font(typeface, style)); 68} 69 70// Compute a matching metric between two styles - 0 is an exact match 71int computeMatch(FontStyle style1, FontStyle style2) { 72 if (style1 == style2) return 0; 73 int score = abs(style1.getWeight() - style2.getWeight()); 74 if (style1.getItalic() != style2.getItalic()) { 75 score += 2; 76 } 77 return score; 78} 79 80MinikinFont* FontFamily::getClosestMatch(FontStyle style) const { 81 const Font* bestFont = NULL; 82 int bestMatch = 0; 83 for (size_t i = 0; i < mFonts.size(); i++) { 84 const Font& font = mFonts[i]; 85 int match = computeMatch(font.style, style); 86 if (i == 0 || match < bestMatch) { 87 bestFont = &font; 88 bestMatch = match; 89 } 90 } 91 return bestFont == NULL ? NULL : bestFont->typeface; 92} 93 94size_t FontFamily::getNumFonts() const { 95 return mFonts.size(); 96} 97 98MinikinFont* FontFamily::getFont(size_t index) const { 99 return mFonts[index].typeface; 100} 101 102FontStyle FontFamily::getStyle(size_t index) const { 103 return mFonts[index].style; 104} 105 106} // namespace android 107