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#include <cogl/cogl.h>
#include <cogl/cogl-xlib.h>
#include <glib.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#define X11_FOREIGN_EVENT_MASK \
(KeyPressMask | \
KeyReleaseMask | \
ButtonPressMask | \
ButtonReleaseMask | \
PointerMotionMask)
static void
update_cogl_x11_event_mask (CoglOnscreen *onscreen,
uint32_t event_mask,
void *user_data)
{
Display *xdpy = user_data;
XSetWindowAttributes attrs;
uint32_t xwin;
attrs.event_mask = event_mask | X11_FOREIGN_EVENT_MASK;
xwin = cogl_x11_onscreen_get_window_xid (onscreen);
XChangeWindowAttributes (xdpy,
(Window)xwin,
CWEventMask,
&attrs);
}
static void
resize_handler (CoglOnscreen *onscreen,
int width,
int height,
void *user_data)
{
CoglFramebuffer *fb = user_data;
cogl_framebuffer_set_viewport (fb, width / 4, height / 4, width / 2, height / 2);
}
int
main (int argc, char **argv)
{
Display *xdpy;
CoglRenderer *renderer;
CoglOnscreenTemplate *onscreen_template;
CoglDisplay *display;
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
CoglPipeline *pipeline;
CoglError *error = NULL;
uint32_t visual;
XVisualInfo template, *xvisinfo;
int visinfos_count;
XSetWindowAttributes xattr;
unsigned long mask;
Window xwin;
CoglVertexP2C4 triangle_vertices[] = {
{0, 0.7, 0xff, 0x00, 0x00, 0xff},
{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
};
CoglPrimitive *triangle;
/* Since we want to test external ownership of the X display,
* connect to X manually... */
xdpy = XOpenDisplay (NULL);
if (!xdpy)
{
fprintf (stderr, "Failed to open X Display\n");
return 1;
}
/* Choose a means to render... */
renderer = cogl_renderer_new ();
cogl_xlib_renderer_set_foreign_display (renderer, xdpy);
if (!cogl_renderer_connect (renderer, &error))
{
fprintf (stderr, "Failed to connect to a renderer: %s\n",
error->message);
}
/* Create a template for onscreen framebuffers that requests an
* alpha component */
onscreen_template = cogl_onscreen_template_new ();
cogl_onscreen_template_set_has_alpha (onscreen_template, TRUE);
/* Give Cogl our template for onscreen framebuffers which can
* influence how the context will be setup */
display = cogl_display_new (renderer, onscreen_template);
cogl_object_unref (renderer);
if (!cogl_display_setup (display, &error))
{
fprintf (stderr, "Failed to setup a display pipeline: %s\n",
error->message);
return 1;
}
ctx = cogl_context_new (display, &error);
if (!ctx)
{
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
onscreen = cogl_onscreen_new (ctx, 640, 480);
/* We want to test that Cogl can handle foreign X windows... */
visual = cogl_x11_onscreen_get_visual_xid (onscreen);
if (!visual)
{
fprintf (stderr, "Failed to query an X visual suitable for the "
"configured CoglOnscreen framebuffer\n");
return 1;
}
template.visualid = visual;
xvisinfo = XGetVisualInfo (xdpy, VisualIDMask, &template, &visinfos_count);
/* window attributes */
xattr.background_pixel = WhitePixel (xdpy, DefaultScreen (xdpy));
xattr.border_pixel = 0;
xattr.colormap = XCreateColormap (xdpy,
DefaultRootWindow (xdpy),
xvisinfo->visual,
AllocNone);
mask = CWBorderPixel | CWColormap;
xwin = XCreateWindow (xdpy,
DefaultRootWindow (xdpy),
0, 0,
800, 600,
0,
xvisinfo->depth,
InputOutput,
xvisinfo->visual,
mask, &xattr);
XFree (xvisinfo);
cogl_x11_onscreen_set_foreign_window_xid (onscreen, xwin,
update_cogl_x11_event_mask,
xdpy);
XMapWindow (xdpy, xwin);
fb = onscreen;
cogl_onscreen_set_resizable (onscreen, TRUE);
cogl_onscreen_add_resize_callback (onscreen, resize_handler, onscreen, NULL);
triangle = cogl_primitive_new_p2c4 (ctx, COGL_VERTICES_MODE_TRIANGLES,
3, triangle_vertices);
pipeline = cogl_pipeline_new (ctx);
for (;;)
{
CoglPollFD *poll_fds;
int n_poll_fds;
int64_t timeout;
while (XPending (xdpy))
{
XEvent event;
XNextEvent (xdpy, &event);
switch (event.type)
{
case KeyRelease:
case ButtonRelease:
return 0;
}
cogl_xlib_renderer_handle_event (renderer, &event);
}
/* After forwarding native events directly to Cogl you should
* then allow Cogl to dispatch any corresponding event
* callbacks, such as resize notification callbacks...
*/
cogl_poll_renderer_get_info (cogl_context_get_renderer (ctx),
&poll_fds, &n_poll_fds, &timeout);
g_poll ((GPollFD *) poll_fds, n_poll_fds, 0);
cogl_poll_renderer_dispatch (cogl_context_get_renderer (ctx),
poll_fds, n_poll_fds);
cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
cogl_primitive_draw (triangle, fb, pipeline);
cogl_onscreen_swap_buffers (onscreen);
}
return 0;
}
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