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/*
* Copyright © 2012 Igalia S.L.
* Copyright © 2009 Eric Anholt
* Copyright © 2009 Chris Wilson
* Copyright © 2005 Red Hat, Inc
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* IGALIA S.L. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Martin Robinson <mrobinson@igalia.com>
*/
#include "cairo-test.h"
#include <cairo-gl.h>
#include <assert.h>
static Window
create_test_window (Display *display,
GLXContext glx_context,
XVisualInfo *visual_info)
{
Colormap colormap;
XSetWindowAttributes window_attributes;
Window window = None;
colormap = XCreateColormap (display,
RootWindow (display, visual_info->screen),
visual_info->visual,
AllocNone);
window_attributes.colormap = colormap;
window_attributes.border_pixel = 0;
window = XCreateWindow (display, RootWindow (display, visual_info->screen),
-1, -1, 1, 1, 0,
visual_info->depth,
InputOutput,
visual_info->visual,
CWBorderPixel | CWColormap, &window_attributes);
XFreeColormap (display, colormap);
XFlush (display);
return window;
}
static cairo_bool_t
multithread_makecurrent_available (Display *display)
{
const char *extensions = glXQueryExtensionsString (display,
DefaultScreen (display));
return !! strstr(extensions, "GLX_MESA_multithread_makecurrent");
}
static void
draw_to_surface (cairo_surface_t *surface)
{
cairo_t *cr = cairo_create (surface);
cairo_paint (cr);
cairo_destroy (cr);
}
static cairo_test_status_t
preamble (cairo_test_context_t *test_ctx)
{
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 *visual_info;
GLXContext glx_context;
cairo_device_t *device;
Display *display;
Window test_window;
cairo_surface_t *window_surface;
cairo_bool_t has_multithread_makecurrent;
display = XOpenDisplay (NULL);
if (display == NULL)
return CAIRO_TEST_UNTESTED;
visual_info = glXChooseVisual (display, DefaultScreen (display), rgba_attribs);
if (visual_info == NULL) {
XCloseDisplay (display);
return CAIRO_TEST_UNTESTED;
}
glx_context = glXCreateContext (display, visual_info, NULL, True);
if (glx_context == NULL) {
XCloseDisplay (display);
return CAIRO_TEST_UNTESTED;
}
test_window = create_test_window (display, glx_context, visual_info);
XFree (visual_info);
if (test_window == None) {
XCloseDisplay (display);
return CAIRO_TEST_UNTESTED;
}
has_multithread_makecurrent = multithread_makecurrent_available (display);
glXMakeCurrent (display, None, None);
/* Creating the device should actually change the GL context, because of
* the creation/activation of a dummy window used for texture surfaces. */
device = cairo_glx_device_create (display, glx_context);
/* It's important that when multithread_makecurrent isn't available the
* Cairo backend clears the current context, so that the dummy texture
* window is not active while the device is unlocked. */
if (has_multithread_makecurrent) {
assert (None != glXGetCurrentDrawable ());
assert (display == glXGetCurrentDisplay ());
assert (glx_context == glXGetCurrentContext ());
} else {
assert (None == glXGetCurrentDrawable ());
assert (None == glXGetCurrentDisplay ());
assert (None == glXGetCurrentContext ());
}
window_surface = cairo_gl_surface_create_for_window (device, test_window,
1, 1);
assert (cairo_surface_status (window_surface) == CAIRO_STATUS_SUCCESS);
draw_to_surface (window_surface);
if (has_multithread_makecurrent) {
assert (test_window == glXGetCurrentDrawable ());
assert (display == glXGetCurrentDisplay ());
assert (glx_context == glXGetCurrentContext ());
} else {
assert (None == glXGetCurrentDrawable ());
assert (None == glXGetCurrentDisplay ());
assert (None == glXGetCurrentContext ());
}
/* In this case, drawing to the window surface will not change the current
* GL context, so Cairo setting the current surface and context to none. */
glXMakeCurrent (display, test_window, glx_context);
draw_to_surface (window_surface);
assert (test_window == glXGetCurrentDrawable ());
assert (display == glXGetCurrentDisplay ());
assert (glx_context == glXGetCurrentContext ());
/* There should be no context change when destroying the device. */
cairo_device_destroy (device);
assert (test_window == glXGetCurrentDrawable ());
assert (display == glXGetCurrentDisplay ());
assert (glx_context == glXGetCurrentContext ());
glXDestroyContext(display, glx_context);
XDestroyWindow (display, test_window);
XCloseDisplay (display);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (gl_device_creation_changes_context,
"Test that using the Cairo GL backend leaves the current GL context in the appropriate state",
"gl", /* keywords */
NULL, /* requirements */
0, 0,
preamble, NULL)
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