1 files changed, 67 insertions, 0 deletions

diff --git a/common/pango.c b/common/pango.c
new file mode 100644
index 00000000..212d96cf
--- /dev/null
+++ b/common/pango.c
@@ -0,0 +1,67 @@
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
+                const char *text, int32_t scale, bool markup) {
+        PangoLayout *layout = pango_cairo_create_layout(cairo);
+        PangoAttrList *attrs;
+        if (markup) {
+                char *buf;
+                pango_parse_markup(text, -1, 0, &attrs, &buf, NULL, NULL);
+                pango_layout_set_markup(layout, buf, -1);
+                free(buf);
+        } else {
+                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, 1);
+        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,
+                int32_t scale, bool markup, const char *fmt, ...) {
+        char *buf = malloc(2048);
+
+        va_list args;
+        va_start(args, fmt);
+        if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+                strcpy(buf, "[buffer overflow]");
+        }
+        va_end(args);
+
+        PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+        pango_cairo_update_layout(cairo, layout);
+        pango_layout_get_pixel_size(layout, width, height);
+        g_object_unref(layout);
+        free(buf);
+}
+
+void pango_printf(cairo_t *cairo, const char *font,
+                int32_t scale, bool markup, const char *fmt, ...) {
+        char *buf = malloc(2048);
+
+        va_list args;
+        va_start(args, fmt);
+        if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+                strcpy(buf, "[buffer overflow]");
+        }
+        va_end(args);
+
+        PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+        pango_cairo_update_layout(cairo, layout);
+        pango_cairo_show_layout(cairo, layout);
+        g_object_unref(layout);
+        free(buf);
+}