204 lines
7.3 KiB
C
204 lines
7.3 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <ctype.h>
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#include "glxclient.h"
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#include <xcb/glx.h>
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#include <X11/Xlib-xcb.h>
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_X_HIDDEN void
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__glX_send_client_info(struct glx_display *glx_dpy)
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{
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const unsigned ext_length = strlen("GLX_ARB_create_context");
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const unsigned prof_length = strlen("_profile");
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char *gl_extension_string;
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int gl_extension_length;
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xcb_connection_t *c;
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Bool any_screen_has_ARB_create_context = False;
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Bool any_screen_has_ARB_create_context_profile = False;
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unsigned i;
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/* You need GLX_ARB_create_context_profile to get beyond 3.1 anyway */
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static const uint32_t gl_versions[] = {
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2, 1,
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3, 0,
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3, 1,
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};
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/*
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* This is weird, but it matches what NVIDIA does/expects. For big-GL
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* below 3.2 there is no such thing as a "profile", so we name them all
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* with no profile bits. Except we don't name anything lower than 2.1,
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* since GLX_ARB_create_context_profile says:
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*
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* "Only the highest supported version below 3.0 should be sent, since
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* OpenGL 2.1 is backwards compatible with all earlier versions."
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*
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* In order to also support GLES below 3.2, we name every possible GLES
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* version with the ES2 bit set, which happens to just mean GLES generally
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* and not a particular major version. 3.2 happens to be a legal version
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* number for both big-GL and GLES, so it gets all three bits set.
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* Everything 3.3 and above is big-GL only so gets the core and compat
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* bits set.
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*/
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static const uint32_t gl_versions_profiles[] = {
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1, 0, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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1, 1, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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2, 0, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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2, 1, 0x0,
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3, 0, 0x0,
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3, 0, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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3, 1, 0x0,
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3, 1, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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3, 2, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB |
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GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
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3, 3, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 0, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 1, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 2, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 3, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 4, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 5, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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4, 6, GLX_CONTEXT_CORE_PROFILE_BIT_ARB |
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GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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};
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static const char glx_extensions[] =
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"GLX_ARB_create_context GLX_ARB_create_context_profile";
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/* There are three possible flavors of the client info structure that the
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* client could send to the server. The version sent depends on the
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* combination of GLX versions and extensions supported by the client and
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* the server. This client only supports GLX major version 1.
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*
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* Server supports Client sends
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* ----------------------------------------------------------------------
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* GLX version = 1.0 Nothing.
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*
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* GLX version >= 1.1 struct GLXClientInfo
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*
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* GLX version >= 1.4 and
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* GLX_ARB_create_context struct glXSetClientInfoARB
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*
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* GLX version >= 1.4 and
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* GLX_ARB_create_context_profile struct glXSetClientInfo2ARB
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*
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* GLX_ARB_create_context and GLX_ARB_create_context_profile use FBConfigs,
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* and these only exist in GLX 1.4 or with GLX_SGIX_fbconfig. I can't
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* imagine an implementation that supports GLX_SGIX_fbconfig and
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* GLX_ARB_create_context but not GLX 1.4. Making GLX 1.4 a hard
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* requirement in this case does not seem like a limitation.
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*/
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if (glx_dpy->minorVersion == 0)
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return;
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/* Determine whether any screen on the server supports either of the
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* create-context extensions.
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*/
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for (i = 0; i < ScreenCount(glx_dpy->dpy); i++) {
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struct glx_screen *src = glx_dpy->screens[i];
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const char *haystack = src->serverGLXexts;
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while (haystack != NULL) {
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char *match = strstr(haystack, "GLX_ARB_create_context");
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if (match == NULL)
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break;
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match += ext_length;
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switch (match[0]) {
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case '\0':
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case ' ':
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any_screen_has_ARB_create_context = True;
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break;
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case '_':
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if (strncmp(match, "_profile", prof_length) == 0
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&& (match[prof_length] == '\0'
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|| match[prof_length] == ' ')) {
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any_screen_has_ARB_create_context_profile = True;
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match += prof_length;
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}
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break;
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}
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haystack = match;
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}
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}
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gl_extension_string = __glXGetClientGLExtensionString();
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if (gl_extension_string == NULL) {
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return;
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}
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gl_extension_length = strlen(gl_extension_string) + 1;
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c = XGetXCBConnection(glx_dpy->dpy);
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/* Depending on the GLX verion and the available extensions on the server,
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* send the correct "flavor" of protocol to the server.
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*
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* THE ORDER IS IMPORTANT. We want to send the most recent version of the
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* protocol that the server can support.
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*/
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if (glx_dpy->minorVersion == 4
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&& any_screen_has_ARB_create_context_profile) {
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xcb_glx_set_client_info_2arb(c,
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GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
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sizeof(gl_versions_profiles)
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/ (3 * sizeof(gl_versions_profiles[0])),
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gl_extension_length,
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strlen(glx_extensions) + 1,
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gl_versions_profiles,
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gl_extension_string,
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glx_extensions);
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} else if (glx_dpy->minorVersion == 4
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&& any_screen_has_ARB_create_context) {
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xcb_glx_set_client_info_arb(c,
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GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
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sizeof(gl_versions)
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/ (2 * sizeof(gl_versions[0])),
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gl_extension_length,
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strlen(glx_extensions) + 1,
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gl_versions,
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gl_extension_string,
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glx_extensions);
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} else {
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xcb_glx_client_info(c,
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GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
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gl_extension_length,
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gl_extension_string);
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}
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free(gl_extension_string);
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}
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