2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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21 * DEALINGS IN THE SOFTWARE.
25 #include "glxclient.h"
26 #include "glx_error.h"
28 #include <X11/Xlib-xcb.h>
32 #if INT_MAX != 2147483647
33 #error This code requires sizeof(uint32_t) == sizeof(int).
37 glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
38 GLXContext share_context, Bool direct,
39 const int *attrib_list)
41 xcb_connection_t *const c = XGetXCBConnection(dpy);
42 struct glx_config *const cfg = (struct glx_config *) config;
43 struct glx_context *const share = (struct glx_context *) share_context;
44 struct glx_context *gc = NULL;
45 unsigned num_attribs = 0;
46 struct glx_screen *psc;
47 xcb_generic_error_t *err;
48 xcb_void_cookie_t cookie;
49 unsigned dummy_err = 0;
52 if (dpy == NULL || cfg == NULL)
55 /* This means that either the caller passed the wrong display pointer or
56 * one of the internal GLX data structures (probably the fbconfig) has an
57 * error. There is nothing sensible to do, so return an error.
59 psc = GetGLXScreenConfigs(dpy, cfg->screen);
63 assert(cfg->screen == psc->scr);
65 /* Count the number of attributes specified by the application. All
66 * attributes appear in pairs, except the terminating None.
68 if (attrib_list != NULL) {
69 for (/* empty */; attrib_list[num_attribs * 2] != 0; num_attribs++)
73 if (direct && psc->vtable->create_context_attribs) {
74 /* GLX drops the error returned by the driver. The expectation is that
75 * an error will also be returned by the server. The server's error
76 * will be delivered to the application.
78 gc = psc->vtable->create_context_attribs(psc, cfg, share, num_attribs,
79 (const uint32_t *) attrib_list,
84 #ifdef GLX_USE_APPLEGL
85 gc = applegl_create_context(psc, cfg, share, 0);
87 gc = indirect_create_context(psc, cfg, share, 0);
91 gc->xid = xcb_generate_id(c);
92 gc->share_xid = (share != NULL) ? share->xid : 0;
94 /* The manual pages for glXCreateContext and glXCreateNewContext say:
96 * "NULL is returned if execution fails on the client side."
98 * If the server generates an error, the application is supposed to catch
99 * the protocol error and handle it. Part of handling the error is freeing
100 * the possibly non-NULL value returned by this function.
102 #ifdef HAVE_XCB_GLX_CREATE_CONTEXT
104 xcb_glx_create_context_attribs_arb_checked(c,
113 err = xcb_request_check(c, cookie);
115 /* This is a hugely ugly hack to make things compile on systems that lack
116 * the proper XCB version.
118 memset(&cookie, 0, sizeof(cookie));
120 err = calloc(1, sizeof(*err));
121 err->error_code = BadRequest;
122 err->sequence = dpy->request;
123 err->resource_id = gc->xid;
124 err->minor_code = gc->majorOpcode;
125 err->major_code = 34;
128 gc->vtable->destroy(gc);
131 __glXSendErrorForXcb(dpy, err);
135 return (GLXContext) gc;