[Mesa-dev] [PATCH 09/20] glx: Initial implementation of glXCreateContextAttribsARB
Ian Romanick
idr at freedesktop.org
Tue Dec 20 12:31:12 PST 2011
From: Ian Romanick <ian.d.romanick at intel.com>
Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/glx/Makefile | 1 +
src/glx/create_context.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++
src/glx/glxclient.h | 2 +
src/glx/glxcmds.c | 2 +-
4 files changed, 121 insertions(+), 1 deletions(-)
create mode 100644 src/glx/create_context.c
diff --git a/src/glx/Makefile b/src/glx/Makefile
index 69d7c7c..67d03bc 100644
--- a/src/glx/Makefile
+++ b/src/glx/Makefile
@@ -12,6 +12,7 @@ SOURCES = \
clientattrib.c \
clientinfo.c \
compsize.c \
+ create_context.c \
eval.c \
glxconfig.c \
glxcmds.c \
diff --git a/src/glx/create_context.c b/src/glx/create_context.c
new file mode 100644
index 0000000..41f0805
--- /dev/null
+++ b/src/glx/create_context.c
@@ -0,0 +1,117 @@
+/*
+ * 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 <limits.h>
+#include "glxclient.h"
+#include "glx_error.h"
+#include <xcb/glx.h>
+#include <X11/Xlib-xcb.h>
+
+#include <assert.h>
+
+#if INT_MAX != 2147483647
+#error This code requires sizeof(uint32_t) == sizeof(int).
+#endif
+
+_X_HIDDEN GLXContext
+glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
+ GLXContext share_context, Bool direct,
+ const int *attrib_list)
+{
+ xcb_connection_t *const c = XGetXCBConnection(dpy);
+ struct glx_config *const cfg = (struct glx_config *) config;
+ struct glx_context *const share = (struct glx_context *) share_context;
+ struct glx_context *gc = NULL;
+ unsigned num_attribs = 0;
+ struct glx_screen *psc;
+ xcb_generic_error_t *err;
+ xcb_void_cookie_t cookie;
+ unsigned dummy_err = 0;
+
+
+ if (dpy == NULL || cfg == NULL)
+ return NULL;
+
+ /* This means that either the caller passed the wrong display pointer or
+ * one of the internal GLX data structures (probably the fbconfig) has an
+ * error. There is nothing sensible to do, so return an error.
+ */
+ psc = GetGLXScreenConfigs(dpy, cfg->screen);
+ if (psc == NULL)
+ return NULL;
+
+ assert(cfg->screen == psc->scr);
+
+ /* Count the number of attributes specified by the application. All
+ * attributes appear in pairs, except the terminating None.
+ */
+ if (attrib_list != NULL) {
+ for (/* empty */; attrib_list[num_attribs * 2] != 0; num_attribs++)
+ /* empty */ ;
+ }
+
+ if (direct && psc->vtable->create_context_attribs) {
+ /* GLX drops the error returned by the driver. The expectation is that
+ * an error will also be returned by the server. The server's error
+ * will be delivered to the application.
+ */
+ gc = psc->vtable->create_context_attribs(psc, cfg, share, num_attribs,
+ (const uint32_t *) attrib_list,
+ &dummy_err);
+ }
+
+ if (gc == NULL)
+ gc = indirect_create_context(psc, cfg, share, 0);
+
+ gc->xid = xcb_generate_id(c);
+ gc->share_xid = (share != NULL) ? share->xid : 0;
+
+ /* The manual pages for glXCreateContext and glXCreateNewContext say:
+ *
+ * "NULL is returned if execution fails on the client side."
+ *
+ * If the server generates an error, the application is supposed to catch
+ * the protocol error and handle it. Part of handling the error is freeing
+ * the possibly non-NULL value returned by this function.
+ */
+ cookie =
+ xcb_glx_create_context_attribs_arb_checked(c,
+ gc->xid,
+ cfg->fbconfigID,
+ cfg->screen,
+ gc->share_xid,
+ gc->isDirect,
+ num_attribs,
+ (const uint32_t *)
+ attrib_list);
+ err = xcb_request_check(c, cookie);
+ if (err != NULL) {
+ gc->vtable->destroy(gc);
+ gc = NULL;
+
+ __glXSendErrorForXcb(dpy, err);
+ free(err);
+ }
+
+ return (GLXContext) gc;
+}
diff --git a/src/glx/glxclient.h b/src/glx/glxclient.h
index ecfd823..13cd939 100644
--- a/src/glx/glxclient.h
+++ b/src/glx/glxclient.h
@@ -789,6 +789,8 @@ extern __GLXDRIdrawable *
GetGLXDRIDrawable(Display *dpy, GLXDrawable drawable);
#endif
+extern struct glx_screen *GetGLXScreenConfigs(Display * dpy, int scrn);
+
#ifdef GLX_USE_APPLEGL
extern struct glx_screen *
applegl_create_screen(int screen, struct glx_display * priv);
diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index d3f5bf0..f7cbf2f 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -150,7 +150,7 @@ DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
* number range for \c dpy?
*/
-static struct glx_screen *
+_X_HIDDEN struct glx_screen *
GetGLXScreenConfigs(Display * dpy, int scrn)
{
struct glx_display *const priv = __glXInitialize(dpy);
--
1.7.6.4
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