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98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
#include "font.h"
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#include <stdlib.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <fontconfig/fontconfig.h>
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#define LOG_MODULE "font"
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#include "log.h"
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static FT_Library ft_lib;
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static void __attribute__((constructor))
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init(void)
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{
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FcInit();
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FT_Init_FreeType(&ft_lib);
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}
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static void __attribute__((destructor))
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fini(void)
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{
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FcFini();
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FT_Done_FreeType(ft_lib);
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}
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bool
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font_from_name(const char *name, struct font *font)
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{
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memset(font, 0, sizeof(*font));
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FcPattern *pattern = FcNameParse((const unsigned char *)name);
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if (pattern == NULL) {
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LOG_ERR("%s: failed to lookup font", name);
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return false;
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}
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if (!FcConfigSubstitute(NULL, pattern, FcMatchPattern)) {
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LOG_ERR("%s: failed to do config substitution", name);
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FcPatternDestroy(pattern);
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return false;
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}
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FcDefaultSubstitute(pattern);
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FcResult result;
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FcPattern *final_pattern = FcFontMatch(NULL, pattern, &result);
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FcPatternDestroy(pattern);
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if (final_pattern == NULL) {
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LOG_ERR("%s: failed to match font", name);
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return false;
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}
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FcChar8 *face_file = NULL;
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if (FcPatternGetString(final_pattern, FC_FT_FACE, 0, &face_file) != FcResultMatch) {
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if (FcPatternGetString(final_pattern, FC_FILE, 0, &face_file) != FcResultMatch) {
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LOG_ERR("no font file name available");
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FcPatternDestroy(final_pattern);
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return false;
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}
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}
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double dpi;
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if (FcPatternGetDouble(final_pattern, FC_DPI, 0, &dpi) != FcResultMatch)
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dpi = 96;
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double size;
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if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &size)) {
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LOG_ERR("%s: failed to get size", name);
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FcPatternDestroy(final_pattern);
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return false;
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}
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LOG_DBG("loading: %s", face_file);
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FT_Face ft_face;
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FT_Error ft_err = FT_New_Face(ft_lib, (const char *)face_file, 0, &ft_face);
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if (ft_err != 0)
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LOG_ERR("%s: failed to create FreeType face", face_file);
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/* TODO: use FT_Set_Char_Size() if FC_PIXEL_SIZE doesn't exist, and use size instead? */
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if ((ft_err = FT_Set_Pixel_Sizes(ft_face, 0, size)) != 0)
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LOG_WARN("failed to set FreeType pixel sizes");
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FcBool fc_hinting, fc_antialias;
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if (FcPatternGetBool(final_pattern, FC_HINTING,0, &fc_hinting) != FcResultMatch)
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fc_hinting = FcTrue;
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if (FcPatternGetBool(final_pattern, FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch)
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fc_antialias = FcTrue;
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FcPatternDestroy(final_pattern);
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font->face = ft_face;
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return true;
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}
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