src/gallium/targets/libgl-xlib/xlib.c

   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
  34 #include "state_tracker/xlib_sw_winsys.h"
  35 #include "xm_winsys.h"
  36 #include "util/u_debug.h"
  37 #include "softpipe/sp_public.h"
  38 #include "llvmpipe/lp_public.h"
  39 #include "cell/ppu/cell_public.h"
  40
  41 /* advertise OpenGL support */
  42 PUBLIC const int st_api_OpenGL = 1;
  43
  44
  45 static struct pipe_screen *
  46 create_screen( struct sw_winsys *winsys )
  47 {
  48 #if defined(GALLIUM_CELL)
  49    if (!getenv("GALLIUM_NOCELL"))
  50       return cell_create_screen( winsys );
  51 #endif
  52
  53 #if defined(GALLIUM_LLVMPIPE)
  54    return llvmpipe_create_screen( winsys );
  55 #endif
  56
  57    return softpipe_create_screen( winsys );
  58 }
  59
  60
  61
  62 static struct pipe_screen *
  63 xlib_create_screen( Display *display )
  64 {
  65    struct sw_winsys *winsys;
  66    struct pipe_screen *screen;
  67
  68    winsys = xlib_create_sw_winsys( display );
  69    if (winsys == NULL)
  70       return NULL;
  71
  72    screen = create_screen(winsys);
  73    if (screen == NULL)
  74       goto fail;
  75
  76    return screen;
  77
  78 fail:
  79    if (winsys)
  80       winsys->destroy( winsys );
  81
  82    return NULL;
  83 }
  84
  85
  86 struct xm_driver xlib_driver =
  87 {
  88    .create_pipe_screen = xlib_create_screen,
  89 };
  90
  91
  92
  93
  94 /* Build the rendering stack.
  95  */
  96 static void _init( void ) __attribute__((constructor));
  97 static void _init( void )
  98 {
  99    /* Initialize the xlib libgl code, pass in the winsys:
 100     */
 101    xmesa_set_driver( &xlib_driver );
 102 }
 103
 104
 105 /***********************************************************************
 106  *
 107  * Butt-ugly hack to convince the linker not to throw away public GL
 108  * symbols (they are all referenced from getprocaddress, I guess).
 109  */
 110 extern void (*linker_foo(const unsigned char *procName))();
 111 extern void (*glXGetProcAddress(const unsigned char *procName))();
 112
 113 extern void (*linker_foo(const unsigned char *procName))()
 114 {
 115    return glXGetProcAddress(procName);
 116 }
 117
 118
 119 /**
 120  * When GLX_INDIRECT_RENDERING is defined, some symbols are missing in
 121  * libglapi.a.  We need to define them here.
 122  */
 123 #ifdef GLX_INDIRECT_RENDERING
 124
 125 #define GL_GLEXT_PROTOTYPES
 126 #include "GL/gl.h"
 127 #include "glapi/glapi.h"
 128 #include "glapi/glapitable.h"
 129 #include "glapi/glapidispatch.h"
 130
 131 #if defined(USE_MGL_NAMESPACE)
 132 #define NAME(func)  mgl##func
 133 #else
 134 #define NAME(func)  gl##func
 135 #endif
 136
 137 #define DISPATCH(FUNC, ARGS, MESSAGE)           \
 138    CALL_ ## FUNC(GET_DISPATCH(), ARGS);
 139
 140 #define RETURN_DISPATCH(FUNC, ARGS, MESSAGE)    \
 141    return CALL_ ## FUNC(GET_DISPATCH(), ARGS);
 142
 143 /* skip normal ones */
 144 #define _GLAPI_SKIP_NORMAL_ENTRY_POINTS
 145 #include "glapi/glapitemp.h"
 146
 147 #endif /* GLX_INDIRECT_RENDERING */