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font: load FreeType face, and set it's pixel sizes

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Daniel Eklöf 2019-07-28 12:09:22 +02:00
parent 90d357befb
commit cb02c9cf41
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GPG key ID: 5BBD4992C116573F
6 changed files with 63 additions and 25 deletions
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63
font.c
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@ -10,30 +10,37 @@
#define LOG_MODULE "font"
#include "log.h"
static FT_Library ft_lib;
static void __attribute__((constructor))
init(void)
{
FcInit();
FT_Init_FreeType(&ft_lib);
}
static void __attribute__((destructor))
fini(void)
{
FcFini();
FT_Done_FreeType(ft_lib);
}
cairo_scaled_font_t *
font_from_name(const char *name)
bool
font_from_name(const char *name, struct font *font)
{
memset(font, 0, sizeof(*font));
FcPattern *pattern = FcNameParse((const unsigned char *)name);
if (pattern == NULL) {
LOG_ERR("%s: failed to lookup font", name);
return NULL;
return false;
}
if (!FcConfigSubstitute(NULL, pattern, FcMatchPattern)) {
LOG_ERR("%s: failed to do config substitution", name);
FcPatternDestroy(pattern);
return NULL;
return false;
}
cairo_font_options_t *options = cairo_font_options_create();
@ -50,9 +57,40 @@ font_from_name(const char *name)
if (final_pattern == NULL) {
LOG_ERR("%s: failed to match font", name);
return NULL;
return false;
}
FcChar8 *face_file = NULL;
if (FcPatternGetString(final_pattern, FC_FT_FACE, 0, &face_file) != FcResultMatch) {
if (FcPatternGetString(final_pattern, FC_FILE, 0, &face_file) != FcResultMatch) {
LOG_ERR("no font file name available");
FcPatternDestroy(final_pattern);
return false;
}
}
double dpi;
if (FcPatternGetDouble(final_pattern, FC_DPI, 0, &dpi) != FcResultMatch)
dpi = 96;
double size;
if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &size)) {
LOG_ERR("%s: failed to get size", name);
FcPatternDestroy(final_pattern);
return false;
}
LOG_DBG("loading: %s", face_file);
FT_Face ft_face;
FT_Error ft_err = FT_New_Face(ft_lib, (const char *)face_file, 0, &ft_face);
if (ft_err != 0)
LOG_ERR("%s: failed to create FreeType face", face_file);
/* TODO: use FT_Set_Char_Size() if FC_PIXEL_SIZE doesn't exist, and use size instead? */
if ((ft_err = FT_Set_Pixel_Sizes(ft_face, 0, size)) != 0)
LOG_WARN("failed to set FreeType pixel sizes");
FcBool fc_hinting, fc_antialias;
if (FcPatternGetBool(final_pattern, FC_HINTING,0, &fc_hinting) != FcResultMatch)
fc_hinting = FcTrue;
@ -65,13 +103,6 @@ font_from_name(const char *name)
cairo_font_options_set_antialias(
options, fc_antialias ? CAIRO_ANTIALIAS_DEFAULT : CAIRO_ANTIALIAS_NONE);
double size;
if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &size)) {
LOG_ERR("%s: failed to get size", name);
FcPatternDestroy(final_pattern);
return NULL;
}
cairo_font_face_t *face = cairo_ft_font_face_create_for_pattern(
final_pattern);
@ -80,7 +111,7 @@ font_from_name(const char *name)
if (cairo_font_face_status(face) != CAIRO_STATUS_SUCCESS) {
LOG_ERR("%s: failed to create cairo font face", name);
cairo_font_face_destroy(face);
return NULL;
return false;
}
cairo_matrix_t matrix, ctm;
@ -96,8 +127,10 @@ font_from_name(const char *name)
if (cairo_scaled_font_status(scaled_font) != CAIRO_STATUS_SUCCESS) {
LOG_ERR("%s: failed to create scaled font", name);
cairo_scaled_font_destroy(scaled_font);
return NULL;
return false;
}
return scaled_font;
font->face = ft_face;
font->font = scaled_font;
return true;
}