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#include <stdlib.h>
#include <pango/pango.h>
#include <pango/pangocairo.h>
const char *text = "The quick brown fox jumped over the lazy dog!";
int num_iters = 100;
GMutex mutex;
static PangoLayout *
create_layout (cairo_t *cr)
{
PangoLayout *layout = pango_cairo_create_layout (cr);
pango_layout_set_text (layout, text, -1);
pango_layout_set_width (layout, 100 * PANGO_SCALE);
return layout;
}
static void
draw (cairo_t *cr, PangoLayout *layout)
{
cairo_set_source_rgba (cr, 1, 1, 1, 1);
cairo_paint (cr);
cairo_set_source_rgba (cr, 1, 1, 1, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
/* force a relayout */
pango_layout_context_changed (layout);
pango_cairo_show_layout (cr, layout);
}
static gpointer
thread_func (gpointer data)
{
int num = GPOINTER_TO_INT (data);
int i;
char *filename;
PangoLayout *layout;
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_A8, 100, 100);
cairo_t *cr = cairo_create (surface);
layout = create_layout (cr);
g_mutex_lock (&mutex);
g_mutex_unlock (&mutex);
for (i = 0; i < num_iters; i++)
draw (cr, layout);
filename = g_strdup_printf ("%d.png", num);
cairo_surface_write_to_png (surface, filename);
g_free (filename);
return 0;
}
int
main (int argc, char **argv)
{
int num_threads = 2;
int i;
GPtrArray *threads = g_ptr_array_new ();
if (argc > 1)
num_threads = atoi (argv[1]);
if (argc > 2)
num_iters = atoi (argv[2]);
g_mutex_lock (&mutex);
for (i = 0; i < num_threads; i++)
g_ptr_array_add (threads,
g_thread_new (g_strdup_printf ("%d", i + 1),
thread_func,
GINT_TO_POINTER (i+1)));
/* Let them loose! */
g_mutex_unlock (&mutex);
for (i = 0; i < num_threads; i++)
g_thread_join (g_ptr_array_index (threads, i));
return 0;
}
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