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 <stdio.h>
18 #include <stdlib.h>
19
20 #include <map>
21 #include <utility>
22
23 #include "sfntly/font.h"
24 #include "subtly/character_predicate.h"
25 #include "subtly/stats.h"
26 #include "subtly/subsetter.h"
27 #include "subtly/utils.h"
28
29 using namespace subtly;
30
PrintUsage(const char * program_name)31 void PrintUsage(const char* program_name) {
32 fprintf(stdout, "Usage: %s <input_font_file> <output_font_file>"
33 "<start_char> <end_char>\n", program_name);
34 }
35
main(int argc,const char ** argv)36 int main(int argc, const char** argv) {
37 const char* program_name = argv[0];
38 if (argc < 5) {
39 PrintUsage(program_name);
40 exit(1);
41 }
42
43 const char* input_font_path = argv[1];
44 const char* output_font_path = argv[2];
45 FontPtr font;
46 font.Attach(subtly::LoadFont(input_font_path));
47 if (font->num_tables() == 0) {
48 fprintf(stderr, "Could not load font %s.\n", input_font_path);
49 exit(1);
50 }
51
52 const char* start_char = argv[3];
53 const char* end_char = argv[4];
54 if (start_char[1] != 0) {
55 fprintf(stderr, "Start character %c invalid.\n", start_char[0]);
56 exit(1);
57 }
58 if (end_char[1] != 0) {
59 fprintf(stderr, "Start character %c invalid.\n", end_char[0]);
60 exit(1);
61 }
62 int32_t original_size = TotalFontSize(font);
63
64
65 Ptr<CharacterPredicate> range_predicate =
66 new AcceptRange(start_char[0], end_char[0]);
67 Ptr<Subsetter> subsetter = new Subsetter(font, range_predicate);
68 Ptr<Font> new_font;
69 new_font.Attach(subsetter->Subset());
70 if (!new_font) {
71 fprintf(stdout, "Cannot create subset.\n");
72 return 0;
73 }
74
75 subtly::SerializeFont(output_font_path, new_font);
76 subtly::PrintComparison(stdout, font, new_font);
77 int32_t new_size = TotalFontSize(new_font);
78 fprintf(stdout, "Went from %d to %d: %lf%% of original\n",
79 original_size, new_size,
80 static_cast<double>(new_size) / original_size * 100);
81 return 0;
82 }
83