94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
// Copyright 2020 - 2025, project-repo and the NEDM contributors
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
#include <cairo.h>
|
|
#include <cairo/cairo.h>
|
|
#include <pango/pangocairo.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <wlr/util/log.h>
|
|
|
|
char *
|
|
lenient_strcat(char *dest, const char *src) {
|
|
if(dest && src) {
|
|
return strcat(dest, src);
|
|
}
|
|
return dest;
|
|
}
|
|
|
|
PangoLayout *
|
|
get_pango_layout(cairo_t *cairo, const char *font, const char *text,
|
|
double scale) {
|
|
PangoLayout *layout = pango_cairo_create_layout(cairo);
|
|
PangoAttrList *attrs;
|
|
|
|
attrs = pango_attr_list_new();
|
|
pango_layout_set_text(layout, text, -1);
|
|
|
|
pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
|
|
PangoFontDescription *desc = pango_font_description_from_string(font);
|
|
pango_layout_set_font_description(layout, desc);
|
|
pango_layout_set_single_paragraph_mode(layout, false);
|
|
pango_layout_set_attributes(layout, attrs);
|
|
pango_attr_list_unref(attrs);
|
|
pango_font_description_free(desc);
|
|
return layout;
|
|
}
|
|
|
|
void
|
|
get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
|
|
int *baseline, double scale, const char *fmt, ...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
// Add one since vsnprintf excludes null terminator.
|
|
int length = vsnprintf(NULL, 0, fmt, args) + 1;
|
|
va_end(args);
|
|
|
|
char *buf = malloc(length);
|
|
if(buf == NULL) {
|
|
wlr_log(WLR_ERROR, "Failed to allocate memory");
|
|
return;
|
|
}
|
|
va_start(args, fmt);
|
|
vsnprintf(buf, length, fmt, args);
|
|
va_end(args);
|
|
|
|
PangoLayout *layout = get_pango_layout(cairo, font, buf, scale);
|
|
pango_cairo_update_layout(cairo, layout);
|
|
pango_layout_get_pixel_size(layout, width, height);
|
|
if(baseline) {
|
|
*baseline = pango_layout_get_baseline(layout) / PANGO_SCALE;
|
|
}
|
|
g_object_unref(layout);
|
|
free(buf);
|
|
}
|
|
|
|
void
|
|
pango_printf(cairo_t *cairo, const char *font, double scale, const char *fmt,
|
|
...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
// Add one since vsnprintf excludes null terminator.
|
|
int length = vsnprintf(NULL, 0, fmt, args) + 1;
|
|
va_end(args);
|
|
|
|
char *buf = malloc(length);
|
|
if(buf == NULL) {
|
|
wlr_log(WLR_ERROR, "Failed to allocate memory");
|
|
return;
|
|
}
|
|
va_start(args, fmt);
|
|
vsnprintf(buf, length, fmt, args);
|
|
va_end(args);
|
|
|
|
PangoLayout *layout = get_pango_layout(cairo, font, buf, scale);
|
|
cairo_font_options_t *fo = cairo_font_options_create();
|
|
cairo_get_font_options(cairo, fo);
|
|
pango_cairo_context_set_font_options(pango_layout_get_context(layout), fo);
|
|
cairo_font_options_destroy(fo);
|
|
pango_cairo_update_layout(cairo, layout);
|
|
pango_cairo_show_layout(cairo, layout);
|
|
g_object_unref(layout);
|
|
free(buf);
|
|
}
|