Rought font extractor that probably has a memory error causing it to behave mysteriously, and the designer now uses a json file of the characters that will work.
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9ab064126f
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a9e25668fb
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#include <fstream> |
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#include <iostream> |
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#include <chrono> // for operator""s, chrono_literals |
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#include <thread> // for sleep_for |
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#include "dbc.hpp" |
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#include <filesystem> |
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#include <fcntl.h> |
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#include "constants.hpp" |
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#include <fmt/core.h> |
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#include <locale> |
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#include <codecvt> |
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#include <vector> |
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#include <nlohmann/json.hpp> |
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#include <ft2build.h> |
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#include <SFML/Graphics/Font.hpp> |
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#include FT_FREETYPE_H |
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#include FT_TRUETYPE_TABLES_H |
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#include FT_TRUETYPE_IDS_H |
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using namespace nlohmann; |
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using namespace fmt; |
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namespace fs = std::filesystem; |
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using std::string, std::wstring, std::vector; |
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const size_t CLEAR_CACHE_POINT=100; |
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struct FontIndex { |
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size_t cm_index; // charmap index
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string glyph; |
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}; |
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struct FontExtractor { |
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size_t $clear_count = 1; |
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wchar_t ui_base_char = L'█'; |
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vector<FontIndex> $index; |
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std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> $converter; |
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vector<string> $charmap; |
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vector<wchar_t> $wcharmap; |
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sf::Font $font; |
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sf::FloatRect $grid_bounds; |
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int $font_size; |
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fs::path $font_path; |
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json $results; |
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FontExtractor(fs::path font_path) : |
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$font_path(font_path) |
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{ |
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bool good = $font.loadFromFile($font_path.string()); |
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dbc::check(good, format("failed to load font {}", $font_path.string())); |
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$font.setSmooth(false); |
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for(int i = 100; i < 200; i++) { |
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auto glyph = $font.getGlyph(ui_base_char, i, false); |
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if(glyph.bounds.width > 0 && glyph.bounds.height > 0) { |
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$grid_bounds = glyph.bounds; |
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$font_size = i; |
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break; |
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} |
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} |
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dbc::check($grid_bounds.width > 0 && $grid_bounds.height > 0, "couldn't find a valid font size"); |
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println("!!!!!!!!!!!!!!!!!!!!! FONT SIZE {}", $font_size); |
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} |
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void configure_font() { |
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FT_ULong charcode; |
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FT_UInt gindex; |
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FT_String buf[32] = {0}; |
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FT_Library library; |
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FT_Face face; |
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auto error = FT_Init_FreeType(&library); |
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dbc::check(!error, "Failed to initialize freetype library."); |
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error = FT_New_Face(library, FONT_FILE_NAME, 0, &face); |
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dbc::check(face->num_faces == 1, format("Font {} has {} but I only support 1.", FONT_FILE_NAME, face->num_faces)); |
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dbc::check(face->charmap, "Font doesn't have a charmap."); |
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println("Font charmaps {}", face->num_charmaps); |
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auto active = FT_Get_Charmap_Index(face->charmap); |
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for(int i = 0; i < face->num_charmaps; i++) { |
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auto format = FT_Get_CMap_Format(face->charmaps[i]); |
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auto lang_id = FT_Get_CMap_Language_ID(face->charmaps[i]); |
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println("{}: {} {}, active: {}, platform: {}, encoding: {}, ms_unicode: {}, language: {}", |
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i, |
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format >= 0 ? "format" : "synthetic", |
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format, |
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i == active, |
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face->charmaps[i]->platform_id, |
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face->charmaps[i]->encoding_id, |
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TT_MS_ID_UNICODE_CS, |
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lang_id); |
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// BUG: this is windows only
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if(face->charmaps[i]->encoding_id == TT_MS_ID_UNICODE_CS) { |
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FT_Set_Charmap(face, face->charmaps[i]); |
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} |
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} |
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bool has_names = FT_HAS_GLYPH_NAMES(face); |
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// get the first char of the map
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charcode = FT_Get_First_Char(face, &gindex); |
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// go through every char and pre-convert
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for(int i = 0; gindex; i++) { |
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if(has_names) FT_Get_Glyph_Name(face, gindex, buf, 32 ); |
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// store it in my pre-convert charmap for later
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wstring wcodestr{(wchar_t)charcode}; |
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string codestr = from_unicode(wcodestr); |
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$charmap.emplace_back(codestr); |
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$wcharmap.push_back(charcode); |
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// keep going
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charcode = FT_Get_Next_Char(face, charcode, &gindex ); |
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} |
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FT_Done_Face(face); |
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FT_Done_FreeType(library); |
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println("FreeType extracted {} glyphs.", $charmap.size()); |
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} |
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size_t next_valid_char(size_t cur_char) { |
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for(size_t i = cur_char+1; i < $wcharmap.size(); i++) { |
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wchar_t test_char = $wcharmap[i]; |
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if($font.hasGlyph(test_char)) { |
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auto glyph = $font.getGlyph(test_char, $font_size, false); |
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auto bounds = glyph.bounds; |
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// skip bad chars
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if(bounds.width <= 0 || bounds.height <= 0) continue; |
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if(bounds.width <= $grid_bounds.width && |
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bounds.height <= $grid_bounds.height) { |
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return i; |
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} |
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} |
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clear_font_cache(); |
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} |
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return 0; |
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} |
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void extract_valid() { |
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size_t cur_char = next_valid_char(1); |
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while(cur_char != 0) { |
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string out = from_unicode(wstring_at(cur_char)); |
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$results.push_back(out); |
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cur_char = next_valid_char(cur_char + 1); |
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} |
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} |
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string from_unicode(wstring input) { |
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try { |
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return $converter.to_bytes(input); |
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} catch(...) { |
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return $converter.to_bytes(L"?"); |
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} |
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} |
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string at(size_t x) { |
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return $index[x].glyph; |
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} |
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wstring wstring_at(size_t cm_index) { |
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return wstring{$wcharmap[cm_index]}; |
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} |
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void clear_font_cache() { |
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if($clear_count % CLEAR_CACHE_POINT == 0) { |
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bool good = $font.loadFromFile($font_path.string()); |
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dbc::check(good, format("failed to load font {}", $font_path.string())); |
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$font.setSmooth(false); |
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$clear_count++; |
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} |
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} |
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}; |
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int main(int argc, char *argv[]) { |
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if(argc != 3) { |
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println("USAGE: fontextractor <input> <output>"); |
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return 1; |
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} |
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fs::path font_path = argv[1]; |
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fs::path out_path = argv[2]; |
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dbc::check(fs::exists(font_path), "ERROR: input file doesn't exist"); |
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FontExtractor fex(font_path); |
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fex.configure_font(); |
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fex.extract_valid(); |
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std::ofstream json_out(out_path, std::ios::binary); |
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json_out << fex.$results.dump(2) << std::endl; |
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println("Wrote {} chars to {}.", fex.$results.size(), out_path.string()); |
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} |
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