gl-surface-source.c [plain text]
#include "cairo-test.h"
#include <cairo-gl.h>
#include "surface-source.c"
struct closure {
Display *dpy;
GLXContext ctx;
};
static void
cleanup (void *data)
{
struct closure *arg = data;
glXDestroyContext (arg->dpy, arg->ctx);
XCloseDisplay (arg->dpy);
free (arg);
}
static cairo_surface_t *
create_source_surface (int size)
{
int rgba_attribs[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DOUBLEBUFFER,
None
};
XVisualInfo *visinfo;
GLXContext ctx;
struct closure *arg;
cairo_device_t *device;
cairo_surface_t *surface;
Display *dpy;
dpy = XOpenDisplay (NULL);
if (dpy == NULL)
return NULL;
visinfo = glXChooseVisual (dpy, DefaultScreen (dpy), rgba_attribs);
if (visinfo == NULL) {
XCloseDisplay (dpy);
return NULL;
}
ctx = glXCreateContext (dpy, visinfo, NULL, True);
XFree (visinfo);
if (ctx == NULL) {
XCloseDisplay (dpy);
return NULL;
}
arg = xmalloc (sizeof (struct closure));
arg->dpy = dpy;
arg->ctx = ctx;
device = cairo_glx_device_create (dpy, ctx);
if (cairo_device_set_user_data (device,
(cairo_user_data_key_t *) cleanup,
arg,
cleanup))
{
cleanup (arg);
return NULL;
}
surface = cairo_gl_surface_create (device,
CAIRO_CONTENT_COLOR_ALPHA,
size, size);
cairo_device_destroy (device);
return surface;
}
CAIRO_TEST (gl_surface_source,
"Test using a GL surface as the source",
"source",
NULL,
SIZE, SIZE,
preamble, draw)