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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
commitf4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch)
tree2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/lib/GL/apple/dri_dispatch.c
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository
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+/* dri_dispatch.c
+ $Id: dri_dispatch.c,v 1.5 2005/07/03 07:00:55 daniels Exp $
+
+ Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
+ Copyright (c) Torrey T. Lyons. All rights reserved.
+
+ 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 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 THE ABOVE LISTED COPYRIGHT
+ HOLDER(S) 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.
+
+ Except as contained in this notice, the name(s) of the above
+ copyright holders shall not be used in advertising or otherwise to
+ promote the sale, use or other dealings in this Software without
+ prior written authorization. */
+/* $XFree86: xc/lib/GL/apple/dri_dispatch.c,v 1.4 2004/04/21 04:59:40 torrey Exp $ */
+
+#include <OpenGL/OpenGL.h>
+#include <OpenGL/CGLContext.h>
+
+/* We use Apple's GL headers, but as of Panther its glext.h
+ did not define the following. */
+#ifndef GL_ARB_vertex_buffer_object
+#include <stddef.h>
+typedef ptrdiff_t GLintptrARB;
+typedef ptrdiff_t GLsizeiptrARB;
+#endif
+
+#define GLAPIENTRYP *
+#include "glapi.h"
+#include "glapitable.h"
+#include "glxclient.h"
+
+#include <Xlibint.h>
+#include <stdio.h>
+
+#ifdef __GNUC__
+# define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
+#else
+# define GCC_VERSION 0
+#endif
+
+#if GCC_VERSION < 3000
+# define __builtin_expect(a, b) a
+#endif
+
+static int indirect_noop (void)
+{
+ return 0;
+}
+
+/* Macro used for gl functions that exist in OpenGL.framework. We'll
+ use the existing stub for the initial dispatch, but need this
+ function to handle indirect contexts. */
+#define DEFUN_LOCAL_1(ret, return, gn, proto, args) \
+static ret indirect__ ## gn proto \
+{ \
+ struct _glapi_table *disp; \
+ \
+ disp = _glapi_Dispatch; \
+ if (__builtin_expect (disp == NULL, 0)) \
+ disp = _glapi_get_dispatch (); \
+ \
+ return (*disp->gn) args; \
+}
+
+/* Macro used for gl functions that don't exist in OpenGL.framework.
+ We drop them on the floor in direct rendering mode, but pass them
+ over the wire normally for indirect contexts. */
+#define DEFUN_EXTERN_1(ret, return, gn, proto, args) \
+ret gl ## gn proto \
+{ \
+ __GLXcontext *gc; \
+ struct _glapi_table *disp; \
+ \
+ gc = __glXGetCurrentContext (); \
+ if (!gc->isDirect) { \
+ disp = _glapi_Dispatch; \
+ if (__builtin_expect (disp == NULL, 0)) \
+ disp = _glapi_get_dispatch (); \
+ \
+ return (*disp->gn) args; \
+ } else { \
+ int a = 0; return (ret) a; \
+ } \
+}
+
+/* Macro for functions that already exist, but with a different name. */
+#define DEFUN_ALIAS_1(ret, return, gn, on, proto, args) \
+ret gl ## gn proto \
+{ \
+ return gl ## on args; \
+}
+
+#define DEFUN_LOCAL(r, gn, p, a) \
+ DEFUN_LOCAL_1 (r, return, gn, p, a)
+#define DEFUN_LOCAL_VOID(gn, p, a) \
+ DEFUN_LOCAL_1 (void, , gn, p, a)
+
+#define DEFUN_EXTERN(r, gn, p, a) \
+ DEFUN_EXTERN_1 (r, return, gn, p, a)
+#define DEFUN_EXTERN_VOID(gn, p, a) \
+ DEFUN_EXTERN_1 (void, , gn, p, a)
+
+#define DEFUN_ALIAS(r, gn, on, p, a) \
+ DEFUN_ALIAS_1 (r, return, gn, on, p, a)
+#define DEFUN_ALIAS_VOID(gn, on, p, a) \
+ DEFUN_ALIAS_1 (void, , gn, on, p, a)
+
+#include "dri_dispatch.h"
+
+__private_extern__ const CGLContextObj
+XAppleDRIGetIndirectContext (void)
+{
+ static CGLContextObj ctx;
+ void **t;
+ int i;
+
+ if (ctx != NULL)
+ return ctx;
+
+ /* initialize gl */
+ CGLSetOption (kCGLGOResetLibrary, 0);
+
+ /* Create an empty "context" for dispatching purposes. Add some slop
+ in case the dispatch table grows in future updates. */
+ ctx = Xcalloc (1, sizeof (struct _CGLContextObject) + 1024);
+
+ /* fill it with no-op vectors */
+ t = (void **) &ctx->disp;
+ for (i = 0; i < (int) (sizeof (ctx->disp) / sizeof (t[0])); i++)
+ t[i] = &indirect_noop;
+
+ /* then install the functions we actually support */
+ INDIRECT_DISPATCH_INIT (((void **) (&ctx->disp)), indirect__);
+
+ return ctx;
+}