glxapi.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*** GLX_SGIX_swap_barrier ***/

void PUBLIC
glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return;
   (*t->BindSwapBarrierSGIX)(dpy, drawable, barrier);
}

Bool PUBLIC
glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return False;
   return (*t->QueryMaxSwapBarriersSGIX)(dpy, screen, max);
}



/*** GLX_SUN_get_transparent_index ***/

Status PUBLIC
glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return False;
   return (*t->GetTransparentIndexSUN)(dpy, overlay, underlay, pTransparent);
}



/*** GLX_MESA_copy_sub_buffer ***/

void PUBLIC
glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable, int x, int y, int width, int height)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return;
   (t->CopySubBufferMESA)(dpy, drawable, x, y, width, height);
}



/*** GLX_MESA_release_buffers ***/

Bool PUBLIC
glXReleaseBuffersMESA(Display *dpy, Window w)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return False;
   return (t->ReleaseBuffersMESA)(dpy, w);
}



/*** GLX_MESA_pixmap_colormap ***/

GLXPixmap PUBLIC
glXCreateGLXPixmapMESA(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap, Colormap cmap)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (!t)
      return 0;
   return (t->CreateGLXPixmapMESA)(dpy, visinfo, pixmap, cmap);
}



/*** GLX_MESA_set_3dfx_mode ***/

Bool PUBLIC
glXSet3DfxModeMESA(int mode)
{
   struct _glxapi_table *t;
   Display *dpy = glXGetCurrentDisplay();
   GET_DISPATCH(dpy, t);
   if (!t)
      return False;
   return (t->Set3DfxModeMESA)(mode);
}



/*** GLX_NV_vertex_array_range ***/

void PUBLIC *
glXAllocateMemoryNV( GLsizei size,
                     GLfloat readFrequency,
                     GLfloat writeFrequency,
                     GLfloat priority )
{
   struct _glxapi_table *t;
   Display *dpy = glXGetCurrentDisplay();
   GET_DISPATCH(dpy, t);
   if (!t)
      return NULL;
   return (t->AllocateMemoryNV)(size, readFrequency, writeFrequency, priority);
}


void PUBLIC
glXFreeMemoryNV( GLvoid *pointer )
{
   struct _glxapi_table *t;
   Display *dpy = glXGetCurrentDisplay();
   GET_DISPATCH(dpy, t);
   if (!t)
      return;
   (t->FreeMemoryNV)(pointer);
}




/*** GLX_MESA_agp_offset */

GLuint PUBLIC
glXGetAGPOffsetMESA( const GLvoid *pointer )
{
   struct _glxapi_table *t;
   Display *dpy = glXGetCurrentDisplay();
   GET_DISPATCH(dpy, t);
   if (!t)
      return ~0;
   return (t->GetAGPOffsetMESA)(pointer);
}


/*** GLX_MESA_allocate_memory */

void *
glXAllocateMemoryMESA(Display *dpy, int scrn, size_t size,
                      float readfreq, float writefreq, float priority)
{
   /* dummy */
   return NULL;
}

void
glXFreeMemoryMESA(Display *dpy, int scrn, void *pointer)
{
   /* dummy */
}


GLuint
glXGetMemoryOffsetMESA(Display *dpy, int scrn, const void *pointer)
{
   /* dummy */
   return 0;
}


/*** GLX_EXT_texture_from_pixmap */

void
glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
                   const int *attrib_list)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (t)
      t->BindTexImageEXT(dpy, drawable, buffer, attrib_list);
}

void
glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
{
   struct _glxapi_table *t;
   GET_DISPATCH(dpy, t);
   if (t)
      t->ReleaseTexImageEXT(dpy, drawable, buffer);
}


/**********************************************************************/
/* GLX API management functions                                       */
/**********************************************************************/


const char *
_glxapi_get_version(void)
{
   return "1.3";
}


/*
 * Return array of extension strings.
 */
const char **
_glxapi_get_extensions(void)
{
   static const char *extensions[] = {
#ifdef GLX_EXT_import_context
      "GLX_EXT_import_context",
#endif
#ifdef GLX_SGI_video_sync
      "GLX_SGI_video_sync",
#endif
#ifdef GLX_MESA_copy_sub_buffer
      "GLX_MESA_copy_sub_buffer",
#endif
#ifdef GLX_MESA_release_buffers
      "GLX_MESA_release_buffers",
#endif
#ifdef GLX_MESA_pixmap_colormap
      "GLX_MESA_pixmap_colormap",
#endif
#ifdef GLX_MESA_set_3dfx_mode
      "GLX_MESA_set_3dfx_mode",
#endif
#ifdef GLX_SGIX_fbconfig
      "GLX_SGIX_fbconfig",
#endif
#ifdef GLX_SGIX_pbuffer
      "GLX_SGIX_pbuffer",
#endif
#ifdef GLX_EXT_texture_from_pixmap
      "GLX_EXT_texture_from_pixmap",
#endif
      NULL
   };
   return extensions;
}


/*
 * Return size of the GLX dispatch table, in entries, not bytes.
 */
GLuint
_glxapi_get_dispatch_table_size(void)
{
   return sizeof(struct _glxapi_table) / sizeof(void *);
}


static int
generic_no_op_func(void)
{
   return 0;
}


/*
 * Initialize all functions in given dispatch table to be no-ops
 */
void
_glxapi_set_no_op_table(struct _glxapi_table *t)
{
   typedef int (*nop_func)(void);
   nop_func *dispatch = (nop_func *) t;
   GLuint n = _glxapi_get_dispatch_table_size();
   GLuint i;
   for (i = 0; i < n; i++) {
      dispatch[i] = generic_no_op_func;
   }
}


struct name_address_pair {
   const char *Name;
   __GLXextFuncPtr Address;
};

static struct name_address_pair GLX_functions[] = {
   /*** GLX_VERSION_1_0 ***/
   { "glXChooseVisual", (__GLXextFuncPtr) glXChooseVisual },
   { "glXCopyContext", (__GLXextFuncPtr) glXCopyContext },
   { "glXCreateContext", (__GLXextFuncPtr) glXCreateContext },
   { "glXCreateGLXPixmap", (__GLXextFuncPtr) glXCreateGLXPixmap },
   { "glXDestroyContext", (__GLXextFuncPtr) glXDestroyContext },
   { "glXDestroyGLXPixmap", (__GLXextFuncPtr) glXDestroyGLXPixmap },
   { "glXGetConfig", (__GLXextFuncPtr) glXGetConfig },
   { "glXGetCurrentContext", (__GLXextFuncPtr) glXGetCurrentContext },
   { "glXGetCurrentDrawable", (__GLXextFuncPtr) glXGetCurrentDrawable },
   { "glXIsDirect", (__GLXextFuncPtr) glXIsDirect },
   { "glXMakeCurrent", (__GLXextFuncPtr) glXMakeCurrent },
   { "glXQueryExtension", (__GLXextFuncPtr) glXQueryExtension },
   { "glXQueryVersion", (__GLXextFuncPtr) glXQueryVersion },
   { "glXSwapBuffers", (__GLXextFuncPtr) glXSwapBuffers },
   { "glXUseXFont", (__GLXextFuncPtr) glXUseXFont },
   { "glXWaitGL", (__GLXextFuncPtr) glXWaitGL },
   { "glXWaitX", (__GLXextFuncPtr) glXWaitX },

   /*** GLX_VERSION_1_1 ***/
   { "glXGetClientString", (__GLXextFuncPtr) glXGetClientString },
   { "glXQueryExtensionsString", (__GLXextFuncPtr) glXQueryExtensionsString },
   { "glXQueryServerString", (__GLXextFuncPtr) glXQueryServerString },

   /*** GLX_VERSION_1_2 ***/
   { "glXGetCurrentDisplay", (__GLXextFuncPtr) glXGetCurrentDisplay },

   /*** GLX_VERSION_1_3 ***/
   { "glXChooseFBConfig", (__GLXextFuncPtr) glXChooseFBConfig },
   { "glXCreateNewContext", (__GLXextFuncPtr) glXCreateNewContext },
   { "glXCreatePbuffer", (__GLXextFuncPtr) glXCreatePbuffer },
   { "glXCreatePixmap", (__GLXextFuncPtr) glXCreatePixmap },
   { "glXCreateWindow", (__GLXextFuncPtr) glXCreateWindow },
   { "glXDestroyPbuffer", (__GLXextFuncPtr) glXDestroyPbuffer },
   { "glXDestroyPixmap", (__GLXextFuncPtr) glXDestroyPixmap },
   { "glXDestroyWindow", (__GLXextFuncPtr) glXDestroyWindow },
   { "glXGetCurrentReadDrawable", (__GLXextFuncPtr) glXGetCurrentReadDrawable },
   { "glXGetFBConfigAttrib", (__GLXextFuncPtr) glXGetFBConfigAttrib },
   { "glXGetFBConfigs", (__GLXextFuncPtr) glXGetFBConfigs },
   { "glXGetSelectedEvent", (__GLXextFuncPtr) glXGetSelectedEvent },
   { "glXGetVisualFromFBConfig", (__GLXextFuncPtr) glXGetVisualFromFBConfig },
   { "glXMakeContextCurrent", (__GLXextFuncPtr) glXMakeContextCurrent },
   { "glXQueryContext", (__GLXextFuncPtr) glXQueryContext },
   { "glXQueryDrawable", (__GLXextFuncPtr) glXQueryDrawable },
   { "glXSelectEvent", (__GLXextFuncPtr) glXSelectEvent },

   /*** GLX_VERSION_1_4 ***/
   { "glXGetProcAddress", (__GLXextFuncPtr) glXGetProcAddress },

   /*** GLX_SGI_swap_control ***/
   { "glXSwapIntervalSGI", (__GLXextFuncPtr) glXSwapIntervalSGI },

   /*** GLX_SGI_video_sync ***/
   { "glXGetVideoSyncSGI", (__GLXextFuncPtr) glXGetVideoSyncSGI },
   { "glXWaitVideoSyncSGI", (__GLXextFuncPtr) glXWaitVideoSyncSGI },

   /*** GLX_SGI_make_current_read ***/
   { "glXMakeCurrentReadSGI", (__GLXextFuncPtr) glXMakeCurrentReadSGI },
   { "glXGetCurrentReadDrawableSGI", (__GLXextFuncPtr) glXGetCurrentReadDrawableSGI },

   /*** GLX_SGIX_video_source ***/
#if defined(_VL_H)
   { "glXCreateGLXVideoSourceSGIX", (__GLXextFuncPtr) glXCreateGLXVideoSourceSGIX },
   { "glXDestroyGLXVideoSourceSGIX", (__GLXextFuncPtr) glXDestroyGLXVideoSourceSGIX },
#endif

   /*** GLX_EXT_import_context ***/
   { "glXFreeContextEXT", (__GLXextFuncPtr) glXFreeContextEXT },
   { "glXGetContextIDEXT", (__GLXextFuncPtr) glXGetContextIDEXT },
   { "glXGetCurrentDisplayEXT", (__GLXextFuncPtr) glXGetCurrentDisplayEXT },
   { "glXImportContextEXT", (__GLXextFuncPtr) glXImportContextEXT },
   { "glXQueryContextInfoEXT", (__GLXextFuncPtr) glXQueryContextInfoEXT },

   /*** GLX_SGIX_fbconfig ***/
   { "glXGetFBConfigAttribSGIX", (__GLXextFuncPtr) glXGetFBConfigAttribSGIX },
   { "glXChooseFBConfigSGIX", (__GLXextFuncPtr) glXChooseFBConfigSGIX },
   { "glXCreateGLXPixmapWithConfigSGIX", (__GLXextFuncPtr) glXCreateGLXPixmapWithConfigSGIX },
   { "glXCreateContextWithConfigSGIX", (__GLXextFuncPtr) glXCreateContextWithConfigSGIX },
   { "glXGetVisualFromFBConfigSGIX", (__GLXextFuncPtr) glXGetVisualFromFBConfigSGIX },
   { "glXGetFBConfigFromVisualSGIX", (__GLXextFuncPtr) glXGetFBConfigFromVisualSGIX },

   /*** GLX_SGIX_pbuffer ***/
   { "glXCreateGLXPbufferSGIX", (__GLXextFuncPtr) glXCreateGLXPbufferSGIX },
   { "glXDestroyGLXPbufferSGIX", (__GLXextFuncPtr) glXDestroyGLXPbufferSGIX },
   { "glXQueryGLXPbufferSGIX", (__GLXextFuncPtr) glXQueryGLXPbufferSGIX },
   { "glXSelectEventSGIX", (__GLXextFuncPtr) glXSelectEventSGIX },
   { "glXGetSelectedEventSGIX", (__GLXextFuncPtr) glXGetSelectedEventSGIX },

   /*** GLX_SGI_cushion ***/
   { "glXCushionSGI", (__GLXextFuncPtr) glXCushionSGI },

   /*** GLX_SGIX_video_resize ***/
   { "glXBindChannelToWindowSGIX", (__GLXextFuncPtr) glXBindChannelToWindowSGIX },
   { "glXChannelRectSGIX", (__GLXextFuncPtr) glXChannelRectSGIX },
   { "glXQueryChannelRectSGIX", (__GLXextFuncPtr) glXQueryChannelRectSGIX },
   { "glXQueryChannelDeltasSGIX", (__GLXextFuncPtr) glXQueryChannelDeltasSGIX },
   { "glXChannelRectSyncSGIX", (__GLXextFuncPtr) glXChannelRectSyncSGIX },

   /*** GLX_SGIX_dmbuffer **/
#if defined(_DM_BUFFER_H_)
   { "glXAssociateDMPbufferSGIX", (__GLXextFuncPtr) glXAssociateDMPbufferSGIX },
#endif

   /*** GLX_SGIX_swap_group ***/
   { "glXJoinSwapGroupSGIX", (__GLXextFuncPtr) glXJoinSwapGroupSGIX },

   /*** GLX_SGIX_swap_barrier ***/
   { "glXBindSwapBarrierSGIX", (__GLXextFuncPtr) glXBindSwapBarrierSGIX },
   { "glXQueryMaxSwapBarriersSGIX", (__GLXextFuncPtr) glXQueryMaxSwapBarriersSGIX },

   /*** GLX_SUN_get_transparent_index ***/
   { "glXGetTransparentIndexSUN", (__GLXextFuncPtr) glXGetTransparentIndexSUN },

   /*** GLX_MESA_copy_sub_buffer ***/
   { "glXCopySubBufferMESA", (__GLXextFuncPtr) glXCopySubBufferMESA },

   /*** GLX_MESA_pixmap_colormap ***/
   { "glXCreateGLXPixmapMESA", (__GLXextFuncPtr) glXCreateGLXPixmapMESA },

   /*** GLX_MESA_release_buffers ***/
   { "glXReleaseBuffersMESA", (__GLXextFuncPtr) glXReleaseBuffersMESA },

   /*** GLX_MESA_set_3dfx_mode ***/
   { "glXSet3DfxModeMESA", (__GLXextFuncPtr) glXSet3DfxModeMESA },

   /*** GLX_ARB_get_proc_address ***/
   { "glXGetProcAddressARB", (__GLXextFuncPtr) glXGetProcAddressARB },

   /*** GLX_NV_vertex_array_range ***/
   { "glXAllocateMemoryNV", (__GLXextFuncPtr) glXAllocateMemoryNV },
   { "glXFreeMemoryNV", (__GLXextFuncPtr) glXFreeMemoryNV },

   /*** GLX_MESA_agp_offset ***/
   { "glXGetAGPOffsetMESA", (__GLXextFuncPtr) glXGetAGPOffsetMESA },

   /*** GLX_MESA_allocate_memory ***/
   { "glXAllocateMemoryMESA", (__GLXextFuncPtr) glXAllocateMemoryMESA },
   { "glXFreeMemoryMESA", (__GLXextFuncPtr) glXFreeMemoryMESA },
   { "glXGetMemoryOffsetMESA", (__GLXextFuncPtr) glXGetMemoryOffsetMESA },

   /*** GLX_EXT_texture_from_pixmap ***/
   { "glXBindTexImageEXT", (__GLXextFuncPtr) glXBindTexImageEXT },
   { "glXReleaseTexImageEXT", (__GLXextFuncPtr) glXReleaseTexImageEXT },

   { NULL, NULL }   /* end of list */
};



/*
 * Return address of named glX function, or NULL if not found.
 */
__GLXextFuncPtr
_glxapi_get_proc_address(const char *funcName)
{
   GLuint i;
   for (i = 0; GLX_functions[i].Name; i++) {
      if (strcmp(GLX_functions[i].Name, funcName) == 0)
         return GLX_functions[i].Address;
   }
   return NULL;
}



/*
 * This function does not get dispatched through the dispatch table
 * since it's really a "meta" function.
 */
__GLXextFuncPtr
glXGetProcAddressARB(const GLubyte *procName)
{
   __GLXextFuncPtr f;

   f = _glxapi_get_proc_address((const char *) procName);
   if (f) {
      return f;
   }

   f = (__GLXextFuncPtr) _glapi_get_proc_address((const char *) procName);
   return f;
}


/* GLX 1.4 */
void (*glXGetProcAddress(const GLubyte *procName))()
{
   return glXGetProcAddressARB(procName);
}