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gl: Exercise Window destinations with boilerplate

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Add a gl-window boilerplate target to exercise using GL to render to a
visible Drawable -- for instance, a window has a different coordinate
system to a framebuffer...
This commit is contained in:
Chris Wilson 2010-01-18 23:37:36 +00:00
parent ccea7fd7c1
commit 0f09349dd8
1 changed files with 99 additions and 0 deletions
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99
boilerplate/cairo-boilerplate-gl.c
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@ -138,6 +138,93 @@ _cairo_boilerplate_gl_create_surface (const char *name,
return surface;
}
static cairo_surface_t *
_cairo_boilerplate_gl_create_window (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
int id,
void **closure)
{
int rgb_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
XVisualInfo *vi;
GLXContext ctx;
gl_target_closure_t *gltc;
cairo_surface_t *surface;
Display *dpy;
XSetWindowAttributes attr;
gltc = calloc (1, sizeof (gl_target_closure_t));
*closure = gltc;
if (width == 0)
width = 1;
if (height == 0)
height = 1;
dpy = XOpenDisplay (NULL);
gltc->dpy = dpy;
if (!gltc->dpy) {
fprintf (stderr, "Failed to open display: %s\n", XDisplayName(0));
free (gltc);
return NULL;
}
if (mode == CAIRO_BOILERPLATE_MODE_TEST)
XSynchronize (gltc->dpy, 1);
vi = glXChooseVisual (dpy, DefaultScreen (dpy), rgb_attribs);
if (vi == NULL) {
fprintf (stderr, "Failed to create RGB, double-buffered visual\n");
XCloseDisplay (dpy);
free (gltc);
return NULL;
}
attr.colormap = XCreateColormap (dpy,
RootWindow (dpy, vi->screen),
vi->visual,
AllocNone);
attr.border_pixel = 0;
attr.override_redirect = True;
gltc->drawable = XCreateWindow (dpy, DefaultRootWindow (dpy), 0, 0,
width, height, 0, vi->depth,
InputOutput, vi->visual,
CWOverrideRedirect | CWBorderPixel | CWColormap,
&attr);
XMapWindow (dpy, gltc->drawable);
ctx = glXCreateContext (dpy, vi, NULL, True);
XFree (vi);
gltc->ctx = ctx;
gltc->device = cairo_glx_device_create (dpy, ctx);
gltc->surface = surface = cairo_gl_surface_create_for_window (gltc->device,
gltc->drawable,
ceil (width),
ceil (height));
if (cairo_surface_status (surface))
_cairo_boilerplate_gl_cleanup (gltc);
return surface;
}
static cairo_status_t
_cairo_boilerplate_gl_finish_window (cairo_surface_t *surface)
{
cairo_gl_surface_swapbuffers (surface);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_boilerplate_gl_synchronize (void *closure)
{
@ -169,5 +256,17 @@ static const cairo_boilerplate_target_t targets[] = {
_cairo_boilerplate_gl_cleanup,
_cairo_boilerplate_gl_synchronize
},
{
"gl-window", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
"cairo_gl_surface_create_for_window",
_cairo_boilerplate_gl_create_window,
NULL,
_cairo_boilerplate_gl_finish_window,
_cairo_boilerplate_get_image_surface,
cairo_surface_write_to_png,
_cairo_boilerplate_gl_cleanup,
_cairo_boilerplate_gl_synchronize
},
};
CAIRO_BOILERPLATE (gl, targets)