[PATCH 03/20] glx: Add __glX_send_client_info super function
Ian Romanick
idr at freedesktop.org
Tue Dec 20 12:31:06 PST 2011
From: Ian Romanick <ian.d.romanick at intel.com>
This function picks the correct client-info protocol (based on the
server's GLX version and set of extensions) and sends it to the
server.
Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/glx/Makefile | 1 +
src/glx/clientinfo.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++
src/glx/glxclient.h | 3 +
3 files changed, 160 insertions(+), 0 deletions(-)
create mode 100644 src/glx/clientinfo.c
diff --git a/src/glx/Makefile b/src/glx/Makefile
index 183ffb1..69d7c7c 100644
--- a/src/glx/Makefile
+++ b/src/glx/Makefile
@@ -10,6 +10,7 @@ EXTRA_DEFINES = $(EXTRA_DEFINES_XF86VIDMODE) -D_REENTRANT \
SOURCES = \
clientattrib.c \
+ clientinfo.c \
compsize.c \
eval.c \
glxconfig.c \
diff --git a/src/glx/clientinfo.c b/src/glx/clientinfo.c
new file mode 100644
index 0000000..429e9a3
--- /dev/null
+++ b/src/glx/clientinfo.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <ctype.h>
+
+#include "glxclient.h"
+#include <xcb/glx.h>
+#include <X11/Xlib-xcb.h>
+
+_X_HIDDEN void
+__glX_send_client_info(struct glx_display *glx_dpy)
+{
+ const unsigned ext_length = strlen("GLX_ARB_create_context");
+ const unsigned prof_length = strlen("_profile");
+ char *gl_extension_string;
+ int gl_extension_length;
+ xcb_connection_t *c;
+ Bool any_screen_has_ARB_create_context = False;
+ Bool any_screen_has_ARB_create_context_profile = False;
+ unsigned i;
+ static const uint32_t gl_versions[] = {
+ 1, 4,
+ };
+ static const uint32_t gl_versions_profiles[] = {
+ 1, 4, 0x00000000,
+ };
+ static const char glx_extensions[] =
+ "GLX_ARB_create_context GLX_ARB_create_context_profile";
+
+ /* There are three possible flavors of the client info structure that the
+ * client could send to the server. The version sent depends on the
+ * combination of GLX versions and extensions supported by the client and
+ * the server.
+ *
+ * Server supports Client sends
+ * ----------------------------------------------------------------------
+ * GLX version = 1.0 Nothing.
+ *
+ * GLX version >= 1.1 struct GLXClientInfo
+ *
+ * GLX version >= 1.4 and
+ * GLX_ARB_create_context struct glXSetClientInfoARB
+ *
+ * GLX version >= 1.4 and
+ * GLX_ARB_create_context_profile struct glXSetClientInfo2ARB
+ *
+ * GLX_ARB_create_context and GLX_ARB_create_context_profile use FBConfigs,
+ * and these only exist in GLX 1.4 or with GLX_SGIX_fbconfig. I can't
+ * imagine an implementation that supports GLX_SGIX_fbconfig and
+ * GLX_ARB_create_context but not GLX 1.4. Making GLX 1.4 a hard
+ * requirement in this case does not seem like a limitation.
+ *
+ * This library currently only supports struct GLXClientInfo.
+ */
+
+ if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 0)
+ return;
+
+ /* Determine whether any screen on the server supports either of the
+ * create-context extensions.
+ */
+ for (i = 0; i < ScreenCount(glx_dpy->dpy); i++) {
+ struct glx_screen *src = glx_dpy->screens[i];
+
+ const char *haystack = src->serverGLXexts;
+ while (haystack != NULL) {
+ char *match = strstr(haystack, "GLX_ARB_create_context");
+
+ if (match == NULL)
+ break;
+
+ match += ext_length;
+
+ switch (match[0]) {
+ case '\0':
+ case ' ':
+ any_screen_has_ARB_create_context = True;
+ break;
+
+ case '_':
+ if (strncmp(match, "_profile", prof_length) == 0
+ && (match[prof_length] == '\0'
+ || match[prof_length] == ' ')) {
+ any_screen_has_ARB_create_context_profile = True;
+ match += prof_length;
+ }
+ break;
+ }
+
+ haystack = match;
+ }
+ }
+
+ gl_extension_string = __glXGetClientGLExtensionString();
+ gl_extension_length = strlen(gl_extension_string) + 1;
+
+ c = XGetXCBConnection(glx_dpy->dpy);
+
+ /* Depending on the GLX verion and the available extensions on the server,
+ * send the correct "flavor" of protocol to the server.
+ *
+ * THE ORDER IS IMPORTANT. We want to send the most recent version of the
+ * protocol that the server can support.
+ */
+ if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 4
+ && any_screen_has_ARB_create_context_profile) {
+ xcb_glx_set_client_info_2arb(c,
+ GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
+ sizeof(gl_versions_profiles)
+ / (3 * sizeof(gl_versions_profiles[0])),
+ gl_extension_length,
+ strlen(glx_extensions) + 1,
+ gl_versions_profiles,
+ gl_extension_string,
+ glx_extensions);
+ } else if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 4
+ && any_screen_has_ARB_create_context) {
+ xcb_glx_set_client_info_arb(c,
+ GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
+ sizeof(gl_versions)
+ / (2 * sizeof(gl_versions[0])),
+ gl_extension_length,
+ strlen(glx_extensions) + 1,
+ gl_versions,
+ gl_extension_string,
+ glx_extensions);
+ } else {
+ xcb_glx_client_info(c,
+ GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
+ gl_extension_length,
+ gl_extension_string);
+ }
+
+ Xfree(gl_extension_string);
+}
diff --git a/src/glx/glxclient.h b/src/glx/glxclient.h
index 109206f..0011d39 100644
--- a/src/glx/glxclient.h
+++ b/src/glx/glxclient.h
@@ -726,6 +726,9 @@ extern void __glXFreeVertexArrayState(struct glx_context *);
*/
extern void __glXClientInfo(Display * dpy, int opcode);
+_X_HIDDEN void
+__glX_send_client_info(struct glx_display *glx_dpy);
+
/************************************************************************/
/*
--
1.7.6.4
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