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#include <gdk/gdk.h>
#include <cairo.h>
const cairo_user_data_key_t pixel_key;
const cairo_user_data_key_t format_key;
cairo_surface_t *
f_image_surface_create (cairo_format_t format, int width, int height)
{
int size;
cairo_surface_t *surface;
unsigned char *pixels;
switch (format) {
case CAIRO_FORMAT_ARGB32:
case CAIRO_FORMAT_RGB24:
size = 4;
break;
case CAIRO_FORMAT_A8:
size = 8;
break;
case CAIRO_FORMAT_A1:
size = 1;
break;
}
pixels = g_malloc (width * height * size);
surface = cairo_image_surface_create_for_data (pixels,
format,
width,
height,
width * size);
cairo_surface_set_user_data (surface, &pixel_key, pixels, g_free);
cairo_surface_set_user_data (surface, &format_key, GINT_TO_POINTER (format), NULL);
return surface;
}
void *
f_image_surface_get_data (cairo_surface_t *surface)
{
return cairo_surface_get_user_data (surface, &pixel_key);
}
cairo_format_t
f_image_surface_get_format (cairo_surface_t *surface)
{
return GPOINTER_TO_INT (cairo_surface_get_user_data (surface, &format_key));
}
int
f_image_surface_get_width (cairo_surface_t *surface)
{
return cairo_image_surface_get_width (surface);
}
int
f_image_surface_get_height (cairo_surface_t *surface)
{
return cairo_image_surface_get_height (surface);
}
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