1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 *
27 **************************************************************************/
28
29/*
30 * Authors:
31 *   Keith Whitwell
32 */
33#include "pipe/p_compiler.h"
34#include "util/u_debug.h"
35#include "state_tracker/xlib_sw_winsys.h"
36#include "xm_public.h"
37
38#include "state_tracker/st_gl_api.h"
39#include "target-helpers/inline_sw_helper.h"
40#include "target-helpers/inline_debug_helper.h"
41
42
43
44/* Helper function to build a subset of a driver stack consisting of
45 * one of the software rasterizers (llvmpipe, softpipe) and the
46 * xlib winsys.
47 */
48static struct pipe_screen *
49swrast_xlib_create_screen( Display *display )
50{
51   struct sw_winsys *winsys;
52   struct pipe_screen *screen = NULL;
53
54   /* Create the underlying winsys, which performs presents to Xlib
55    * drawables:
56    */
57   winsys = xlib_create_sw_winsys( display );
58   if (winsys == NULL)
59      return NULL;
60
61   /* Create a software rasterizer on top of that winsys:
62    */
63   screen = sw_screen_create( winsys );
64   if (screen == NULL)
65      goto fail;
66
67   /* Inject any wrapping layers we want to here:
68    */
69   return debug_screen_wrap( screen );
70
71fail:
72   if (winsys)
73      winsys->destroy( winsys );
74
75   return NULL;
76}
77
78static struct xm_driver xlib_driver =
79{
80   .create_pipe_screen = swrast_xlib_create_screen,
81   .create_st_api = st_gl_api_create,
82};
83
84
85/* Build the rendering stack.
86 */
87static void _init( void ) __attribute__((constructor));
88static void _init( void )
89{
90   /* Initialize the xlib libgl code, pass in the winsys:
91    */
92   xmesa_set_driver( &xlib_driver );
93}
94
95
96/***********************************************************************
97 *
98 * Butt-ugly hack to convince the linker not to throw away public GL
99 * symbols (they are all referenced from getprocaddress, I guess).
100 */
101extern void (*linker_foo(const unsigned char *procName))();
102extern void (*glXGetProcAddress(const unsigned char *procName))();
103
104extern void (*linker_foo(const unsigned char *procName))()
105{
106   return glXGetProcAddress(procName);
107}
108
109
110/**
111 * When GLX_INDIRECT_RENDERING is defined, some symbols are missing in
112 * libglapi.a.  We need to define them here.
113 */
114#ifdef GLX_INDIRECT_RENDERING
115
116#define GL_GLEXT_PROTOTYPES
117#include "GL/gl.h"
118#include "glapi/glapi.h"
119#include "glapi/glapitable.h"
120
121#if defined(USE_MGL_NAMESPACE)
122#define NAME(func)  mgl##func
123#else
124#define NAME(func)  gl##func
125#endif
126
127#define DISPATCH(FUNC, ARGS, MESSAGE)		\
128   GET_DISPATCH()->FUNC ARGS
129
130#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) 	\
131   return GET_DISPATCH()->FUNC ARGS
132
133/* skip normal ones */
134#define _GLAPI_SKIP_NORMAL_ENTRY_POINTS
135#include "glapi/glapitemp.h"
136
137#endif /* GLX_INDIRECT_RENDERING */
138