Test pango

main.go

package main

/*
#cgo CFLAGS: -I/usr/local/include/pango-1.0
#cgo CFLAGS: -I/usr/local/include/glib-2.0
#cgo CFLAGS: -I/usr/local/include/cairo
#cgo LDFLAGS: -L/usr/local/lib -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lglib-2.0
#include <pango/pangocairo.h>
#include <stdio.h>
#include <pthread.h>

void hello() {
	printf("threa id: %li\n", (unsigned long int)pthread_self());
	PangoFontMap* font_map = pango_cairo_font_map_get_default();
	PangoFontDescription* font_desc = pango_font_description_new();
	pango_font_description_set_family(font_desc, "monospace");
	pango_font_description_set_weight(font_desc, PANGO_WEIGHT_NORMAL);
	pango_font_description_set_size(font_desc, 20 * PANGO_SCALE * 700 / 96);
	PangoContext* context = pango_font_map_create_context(font_map);
	PangoFont* font = pango_font_map_load_font(font_map, context, font_desc);
	PangoFontMetrics* metrics = pango_font_get_metrics(font, NULL);
	int width = pango_font_metrics_get_approximate_digit_width(metrics) / PANGO_SCALE;
	int height = (pango_font_metrics_get_descent(metrics)
					+ pango_font_metrics_get_ascent(metrics)) / PANGO_SCALE;
	printf("%d, %d\n", width, height);


	cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
	cairo_t* cairo = cairo_create(surface);
	cairo_set_source_rgb(cairo, 155 / 255.0, 155 / 255.0, 155 / 255.0);
	cairo_rectangle(cairo, 0, 0, width, height);
	PangoLayout* layout = pango_cairo_create_layout(cairo);
	pango_layout_set_font_description(layout, font_desc);

	g_object_unref(layout);
	cairo_destroy(cairo);
	cairo_surface_destroy(surface);
}

void* font() {
	hello();
	hello();
	return NULL;
}

void two_threads() {
	pthread_t thread1;
	pthread_create(&thread1, NULL, font, NULL);
	pthread_join(thread1, NULL);
	pthread_t thread2;
	pthread_create(&thread2, NULL, font, NULL);
	pthread_join(thread2, NULL);
}

*/
import "C"
import "sync"

func main() {
	wg := sync.WaitGroup{}
	for i := 0; i < 1; i++ {
		wg.Add(1)
		go func() {
			C.two_threads()
			wg.Done()
		}()
	}
	wg.Wait()
}