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/* Cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Chris Wilson
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Chris Wilson.
*/
#include "cairo-boilerplate-private.h"
#include <cairo-gl.h>
#include <X11/X.h>
#include <X11/Xutil.h> /* for XDestroyImage */
static const cairo_user_data_key_t gl_closure_key;
typedef struct _gl_target_closure {
Display *dpy;
int screen;
Window drawable;
GLXContext ctx;
cairo_device_t *device;
cairo_surface_t *surface;
} gl_target_closure_t;
static void
_cairo_boilerplate_gl_cleanup (void *closure)
{
gl_target_closure_t *gltc = closure;
cairo_device_finish (gltc->device);
cairo_device_destroy (gltc->device);
glXDestroyContext (gltc->dpy, gltc->ctx);
if (gltc->drawable)
XDestroyWindow (gltc->dpy, gltc->drawable);
XCloseDisplay (gltc->dpy);
free (gltc);
}
static cairo_surface_t *
_cairo_boilerplate_gl_create_surface (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
void **closure)
{
int rgba_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
int rgb_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
XVisualInfo *visinfo;
GLXContext ctx;
gl_target_closure_t *gltc;
cairo_surface_t *surface;
Display *dpy;
gltc = calloc (1, sizeof (gl_target_closure_t));
*closure = gltc;
width = ceil (width);
height = ceil (height);
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);
if (content == CAIRO_CONTENT_COLOR)
visinfo = glXChooseVisual (dpy, DefaultScreen (dpy), rgb_attribs);
else
visinfo = glXChooseVisual (dpy, DefaultScreen (dpy), rgba_attribs);
if (visinfo == NULL) {
fprintf (stderr, "Failed to create RGB, double-buffered visual\n");
XCloseDisplay (dpy);
free (gltc);
return NULL;
}
ctx = glXCreateContext (dpy, visinfo, NULL, True);
XFree (visinfo);
gltc->ctx = ctx;
gltc->device = cairo_glx_device_create (dpy, ctx);
if (mode == CAIRO_BOILERPLATE_MODE_PERF)
cairo_gl_device_set_thread_aware(gltc->device, FALSE);
gltc->surface = surface = cairo_gl_surface_create (gltc->device,
content, width, height);
if (cairo_surface_status (surface))
_cairo_boilerplate_gl_cleanup (gltc);
return surface;
}
static cairo_surface_t *
_cairo_boilerplate_gl_create_window_common (int rgba_attribs[],
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
gl_target_closure_t *gltc)
{
XVisualInfo *vi;
GLXContext ctx;
cairo_surface_t *surface;
Display *dpy;
XSetWindowAttributes attr;
width = ceil (width);
height = ceil (height);
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), rgba_attribs);
if (vi == NULL) {
fprintf (stderr, "Failed to create RGBA, 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,
width, height);
if (cairo_surface_status (surface)) {
_cairo_boilerplate_gl_cleanup (gltc);
return NULL;
}
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,
void **closure)
{
gl_target_closure_t *gltc;
int rgba_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DOUBLEBUFFER,
GLX_NONE };
gltc = calloc (1, sizeof (gl_target_closure_t));
*closure = gltc;
return _cairo_boilerplate_gl_create_window_common (rgba_attribs, content,
width, height,
max_width, max_height,
mode, gltc);
}
static cairo_surface_t *
_cairo_boilerplate_gl_create_window_msaa (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
void **closure)
{
gl_target_closure_t *gltc;
int rgba_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_STENCIL_SIZE, 1,
GLX_SAMPLES, 4,
GLX_SAMPLE_BUFFERS, 1,
GLX_DOUBLEBUFFER,
GLX_NONE };
gltc = calloc (1, sizeof (gl_target_closure_t));
*closure = gltc;
return _cairo_boilerplate_gl_create_window_common (rgba_attribs, content,
width, height,
max_width, max_height,
mode, gltc);
}
static cairo_surface_t *
_cairo_boilerplate_gl_create_window_db (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
void **closure)
{
cairo_status_t status;
cairo_surface_t *surface;
gl_target_closure_t *gltc;
int rgba_attribs[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DOUBLEBUFFER,
GLX_NONE };
gltc = calloc (1, sizeof (gl_target_closure_t));
*closure = gltc;
surface = _cairo_boilerplate_gl_create_window_common (rgba_attribs, content,
width, height,
max_width, max_height,
mode, gltc);
if (! surface)
return NULL;
surface = cairo_surface_create_similar (gltc->surface, content, width, height);
status = cairo_surface_set_user_data (surface, &gl_closure_key, gltc, NULL);
if (status == CAIRO_STATUS_SUCCESS)
return surface;
cairo_surface_destroy (surface);
_cairo_boilerplate_gl_cleanup (gltc);
return cairo_boilerplate_surface_create_in_error (status);
}
static cairo_status_t
_cairo_boilerplate_gl_finish_window (cairo_surface_t *surface)
{
gl_target_closure_t *gltc = cairo_surface_get_user_data (surface,
&gl_closure_key);
if (gltc != NULL && gltc->surface != NULL) {
cairo_t *cr;
cr = cairo_create (gltc->surface);
cairo_surface_set_device_offset (surface, 0, 0);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_destroy (cr);
surface = gltc->surface;
}
cairo_gl_surface_swapbuffers (surface);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_boilerplate_gl_synchronize (void *closure)
{
gl_target_closure_t *gltc = closure;
if (cairo_device_acquire (gltc->device))
return;
glFinish ();
cairo_device_release (gltc->device);
}
static char *
_cairo_boilerplate_gl_describe (void *closure)
{
gl_target_closure_t *gltc = closure;
char *s;
const GLubyte *vendor, *renderer, *version;
if (cairo_device_acquire (gltc->device))
return NULL;
vendor = glGetString (GL_VENDOR);
renderer = glGetString (GL_RENDERER);
version = glGetString (GL_VERSION);
xasprintf (&s, "%s %s %s", vendor, renderer, version);
cairo_device_release (gltc->device);
return s;
}
static const cairo_boilerplate_target_t targets[] = {
{
"gl", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
"cairo_gl_surface_create",
_cairo_boilerplate_gl_create_surface,
cairo_surface_create_similar,
NULL, NULL,
_cairo_boilerplate_get_image_surface,
cairo_surface_write_to_png,
_cairo_boilerplate_gl_cleanup,
_cairo_boilerplate_gl_synchronize,
_cairo_boilerplate_gl_describe,
TRUE, FALSE, FALSE
},
{
"gl", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR, 1,
"cairo_gl_surface_create",
_cairo_boilerplate_gl_create_surface,
cairo_surface_create_similar,
NULL, NULL,
_cairo_boilerplate_get_image_surface,
cairo_surface_write_to_png,
_cairo_boilerplate_gl_cleanup,
_cairo_boilerplate_gl_synchronize,
_cairo_boilerplate_gl_describe,
FALSE, FALSE, FALSE
},
{
"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,
cairo_surface_create_similar,
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_describe,
FALSE, FALSE, FALSE
},
{
"gl-window-msaa", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
"cairo_gl_surface_create_for_window",
_cairo_boilerplate_gl_create_window_msaa,
cairo_surface_create_similar,
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_describe,
FALSE, FALSE, FALSE
},
{
"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_db,
cairo_surface_create_similar,
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_describe,
FALSE, FALSE, FALSE
},
};
CAIRO_BOILERPLATE (gl, targets)