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      1 /*
      2  * Copyright 2011 Google Inc. All Rights Reserved.
      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 #include "subtly/merger.h"
     18 
     19 #include <stdio.h>
     20 
     21 #include "sfntly/font.h"
     22 #include "sfntly/font_factory.h"
     23 #include "subtly/character_predicate.h"
     24 #include "subtly/font_assembler.h"
     25 #include "subtly/font_info.h"
     26 #include "subtly/utils.h"
     27 
     28 namespace subtly {
     29 using namespace sfntly;
     30 
     31 /******************************************************************************
     32  * Merger class
     33  ******************************************************************************/
     34 Merger::Merger(FontArray* fonts) {
     35   if (!fonts) {
     36     return;
     37   }
     38   int32_t num_fonts = fonts->size();
     39   for (int32_t i = 0; i < num_fonts; ++i) {
     40     fonts_.insert(std::make_pair(i, fonts->at(i)));
     41   }
     42 }
     43 
     44 CALLER_ATTACH Font* Merger::Merge() {
     45   Ptr<FontInfo> merged_info;
     46   merged_info.Attach(MergeFontInfos());
     47   if (!merged_info) {
     48 #if defined (SUBTLY_DEBUG)
     49     fprintf(stderr, "Could not create merged font info\n");
     50 #endif
     51     return NULL;
     52   }
     53   Ptr<FontAssembler> font_assembler = new FontAssembler(merged_info);
     54   return font_assembler->Assemble();
     55 }
     56 
     57 CALLER_ATTACH FontInfo* Merger::MergeFontInfos() {
     58   Ptr<FontInfo> font_info = new FontInfo;
     59   font_info->set_fonts(&fonts_);
     60   for (FontIdMap::iterator it = fonts_.begin(),
     61            e = fonts_.end(); it != e; ++it) {
     62     Ptr<FontSourcedInfoBuilder> info_builder =
     63         new FontSourcedInfoBuilder(it->second, it->first, NULL);
     64     Ptr<FontInfo> current_font_info;
     65     current_font_info.Attach(info_builder->GetFontInfo());
     66     if (!current_font_info) {
     67 #if defined (SUBTLY_DEBUG)
     68       fprintf(stderr, "Couldn't create font info. "
     69               "No subset will be generated.\n");
     70 #endif
     71       return NULL;
     72     }
     73     font_info->chars_to_glyph_ids()->insert(
     74         current_font_info->chars_to_glyph_ids()->begin(),
     75         current_font_info->chars_to_glyph_ids()->end());
     76     font_info->resolved_glyph_ids()->insert(
     77         current_font_info->resolved_glyph_ids()->begin(),
     78         current_font_info->resolved_glyph_ids()->end());
     79 #if defined (SUBTLY_DEBUG)
     80     fprintf(stderr, "Counts: chars_to_glyph_ids: %d; resoved_glyph_ids: %d\n",
     81             font_info->chars_to_glyph_ids()->size(),
     82             font_info->resolved_glyph_ids()->size());
     83 #endif
     84   }
     85   return font_info.Detach();
     86 }
     87 }
     88