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 // File is originally from Chromium third_party/sfntly/src/subsetter. 17 // Use as test case in sfntly so that problems can be caught in upstream early. 18 #ifndef SFNTLY_CPP_SRC_TEST_FONT_SUBSETTER_H_ 19 #define SFNTLY_CPP_SRC_TEST_FONT_SUBSETTER_H_ 20 21 #include <stddef.h> 22 23 class SfntlyWrapper { 24 public: 25 26 // Font subsetting API 27 // 28 // Input TTF/TTC/OTF fonts, specify the glyph IDs to subset, and the subset 29 // font is returned in |output_buffer| (caller to delete[]). Return value is 30 // the length of output_buffer allocated. 31 // 32 // If subsetting fails, a negative value is returned. If none of the glyph 33 // IDs specified is found, the function will return 0. 34 // 35 // |font_name| Font name, required for TTC files. If specified NULL, 36 // the first available font is selected. 37 // |original_font| Original font file contents. 38 // |font_size| Size of |original_font| in bytes. 39 // |glyph_ids| Glyph IDs to subset. If the specified glyph ID is not 40 // found in the font file, it will be ignored silently. 41 // |glyph_count| Number of glyph IDs in |glyph_ids| 42 // |output_buffer| Generated subset font. Caller to delete[]. 43 static int SubsetFont(const char* font_name, 44 const unsigned char* original_font, 45 size_t font_size, 46 const unsigned int* glyph_ids, 47 size_t glyph_count, 48 unsigned char** output_buffer); 49 50 51 // Font subsetting API 52 // 53 // Input TTF/TTC/OTF fonts, specify the glyph IDs to subset, and the subset 54 // font is returned in |output_buffer| (caller to delete[]). Return value is 55 // the length of output_buffer allocated. 56 // 57 // If subsetting fails, a negative value is returned. If none of the glyph 58 // IDs specified is found, the function will return 0. 59 // 60 // |font_name| Font index, ignored for non-TTC files, 0-indexed. 61 // |original_font| Original font file contents. 62 // |font_size| Size of |original_font| in bytes. 63 // |glyph_ids| Glyph IDs to subset. If the specified glyph ID is not 64 // found in the font file, it will be ignored silently. 65 // |glyph_count| Number of glyph IDs in |glyph_ids| 66 // |output_buffer| Generated subset font. Caller to delete[]. 67 static int SubsetFont(int font_index, 68 const unsigned char* original_font, 69 size_t font_size, 70 const unsigned int* glyph_ids, 71 size_t glyph_count, 72 unsigned char** output_buffer); 73 }; 74 75 #endif // SFNTLY_CPP_SRC_TEST_FONT_SUBSETTER_H_ 76
