FontFamily.cpp revision b80c1f19c58b927820a8a24bf2218e5645724608
19cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien/* 29cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Copyright (C) 2013 The Android Open Source Project 39cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 49cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Licensed under the Apache License, Version 2.0 (the "License"); 59cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * you may not use this file except in compliance with the License. 69cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * You may obtain a copy of the License at 79cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 89cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * http://www.apache.org/licenses/LICENSE-2.0 99cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Unless required by applicable law or agreed to in writing, software 119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * distributed under the License is distributed on an "AS IS" BASIS, 129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * See the License for the specific language governing permissions and 149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * limitations under the License. 159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien */ 169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#define LOG_TAG "Minikin" 189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <cutils/log.h> 209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <stdlib.h> 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <stdint.h> 22bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFont.h> 239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/AnalyzeStyle.h> 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/FontFamily.h> 251279a3bf5ec6131efefbc51d52d24850fd81f676Kenny Root#include <UniquePtr.h> 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 31b80c1f19c58b927820a8a24bf2218e5645724608Raph LevienFontFamily::~FontFamily() { 32b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien for (size_t i = 0; i < mFonts.size(); i++) { 33b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien mFonts[i].typeface->UnrefLocked(); 34b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien } 35b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien} 36b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien 37bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienbool FontFamily::addFont(MinikinFont* typeface) { 38bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien const uint32_t os2Tag = MinikinFont::MakeTag('O', 'S', '/', '2'); 39bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t os2Size = 0; 40bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = typeface->GetTable(os2Tag, NULL, &os2Size); 41bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) return false; 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien UniquePtr<uint8_t[]> os2Data(new uint8_t[os2Size]); 43bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = typeface->GetTable(os2Tag, os2Data.get(), &os2Size); 44bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) return false; 459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight; 469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic; 479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (analyzeStyle(os2Data.get(), os2Size, &weight, &italic)) { 489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien //ALOGD("analyzed weight = %d, italic = %s", weight, italic ? "true" : "false"); 499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontStyle style(weight, italic); 509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien addFont(typeface, style); 519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } else { 539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien ALOGD("failed to analyze style"); 549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return false; 569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 58bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid FontFamily::addFont(MinikinFont* typeface, FontStyle style) { 59b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien typeface->RefLocked(); 609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFonts.push_back(Font(typeface, style)); 619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// Compute a matching metric between two styles - 0 is an exact match 649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienint computeMatch(FontStyle style1, FontStyle style2) { 659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (style1 == style2) return 0; 669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int score = abs(style1.getWeight() - style2.getWeight()); 679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (style1.getItalic() != style2.getItalic()) { 689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien score += 2; 699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return score; 719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 73bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph LevienMinikinFont* FontFamily::getClosestMatch(FontStyle style) const { 749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const Font* bestFont = NULL; 759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bestMatch = 0; 769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mFonts.size(); i++) { 779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const Font& font = mFonts[i]; 789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int match = computeMatch(font.style, style); 799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (i == 0 || match < bestMatch) { 809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bestFont = &font; 819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bestMatch = match; 829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return bestFont == NULL ? NULL : bestFont->typeface; 859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviensize_t FontFamily::getNumFonts() const { 889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts.size(); 899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 91bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph LevienMinikinFont* FontFamily::getFont(size_t index) const { 929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts[index].typeface; 939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienFontStyle FontFamily::getStyle(size_t index) const { 969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts[index].style; 979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 100