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font: sync cairo's options with the FC pattern

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Configure cairo's 'options' with default values, then update the
FontConfig pattern. Finally, update the cairo options after having
retrieved the final FontConfig option.
This commit is contained in:
Daniel Eklöf 2019-07-17 22:50:26 +02:00
parent 8bd969262b
commit 89450bfd44
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GPG key ID: 5BBD4992C116573F
1 changed files with 24 additions and 1 deletions
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25
font.c
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@ -2,6 +2,7 @@
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <fontconfig/fontconfig.h>
#include <cairo-ft.h>
@ -35,6 +36,12 @@ font_from_name(const char *name)
return NULL;
}
cairo_font_options_t *options = cairo_font_options_create();
cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_DEFAULT);
cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_DEFAULT);
cairo_font_options_set_subpixel_order(options, CAIRO_SUBPIXEL_ORDER_DEFAULT);
cairo_ft_font_options_substitute(options, pattern);
FcDefaultSubstitute(pattern);
FcResult result;
@ -46,6 +53,23 @@ font_from_name(const char *name)
return NULL;
}
FcBool fc_hinting, fc_antialias;
if (FcPatternGetBool(final_pattern, FC_HINTING,0, &fc_hinting) != FcResultMatch) {
LOG_WARN("failed to get fontconfig hinting style");
fc_hinting = FcTrue;
}
if (FcPatternGetBool(final_pattern, FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch) {
LOG_WARN("failed to get fontconfig antialias");
fc_antialias = FcTrue;
}
cairo_font_options_set_hint_style(
options, fc_hinting ? CAIRO_HINT_STYLE_DEFAULT : CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_antialias(
options, fc_antialias ? CAIRO_ANTIALIAS_DEFAULT : CAIRO_ANTIALIAS_NONE);
assert(cairo_font_options_get_antialias(options) == CAIRO_ANTIALIAS_NONE);
double size;
if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &size)) {
LOG_ERR("%s: failed to get size", name);
@ -68,7 +92,6 @@ font_from_name(const char *name)
cairo_matrix_init_identity(&ctm);
cairo_matrix_init_scale(&matrix, size, size);
cairo_font_options_t *options = cairo_font_options_create();
cairo_scaled_font_t *scaled_font = cairo_scaled_font_create(
face, &matrix, &ctm, options);