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  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.  */
  48. static struct pipe_screen *
  49. swrast_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.  
  71. fail:
  72.    if (winsys)
  73.       winsys->destroy( winsys );
  74.  
  75.    return NULL;
  76. }
  77.  
  78. static 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.  */
  87. static void _init( void ) __attribute__((constructor));
  88. static 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.  */
  101. extern void (*linker_foo(const unsigned char *procName))();
  102. extern void (*glXGetProcAddress(const unsigned char *procName))();
  103.  
  104. extern 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 "main/glheader.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.