1 files changed, 473 insertions, 469 deletions
diff --git a/xorg-server/glx/glxscreens.c b/xorg-server/glx/glxscreens.c
index 674e2c681..2f6d39efa 100644
--- a/xorg-server/glx/glxscreens.c
+++ b/xorg-server/glx/glxscreens.c
@@ -1,469 +1,473 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. 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 including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * 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
- * SILICON GRAPHICS, INC. 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 of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <GL/glxtokens.h>
-#include <string.h>
-#include <windowstr.h>
-#include <os.h>
-#include <colormapst.h>
-
-#include "privates.h"
-#include "glxserver.h"
-#include "glxutil.h"
-#include "glxext.h"
-#include "protocol-versions.h"
-
-static int glxScreenPrivateKeyIndex;
-static DevPrivateKey glxScreenPrivateKey = &glxScreenPrivateKeyIndex;
-
-const char GLServerVersion[] = "1.4";
-static const char GLServerExtensions[] = 
-			"GL_ARB_depth_texture "
-			"GL_ARB_draw_buffers "
-			"GL_ARB_fragment_program "
-			"GL_ARB_fragment_program_shadow "
-			"GL_ARB_imaging "
-			"GL_ARB_multisample "
-			"GL_ARB_multitexture "
-			"GL_ARB_occlusion_query "
-			"GL_ARB_point_parameters "
-			"GL_ARB_point_sprite "
-			"GL_ARB_shadow "
-			"GL_ARB_shadow_ambient "
-			"GL_ARB_texture_border_clamp "
-			"GL_ARB_texture_compression "
-			"GL_ARB_texture_cube_map "
-			"GL_ARB_texture_env_add "
-			"GL_ARB_texture_env_combine "
-			"GL_ARB_texture_env_crossbar "
-			"GL_ARB_texture_env_dot3 "
-			"GL_ARB_texture_mirrored_repeat "
-			"GL_ARB_texture_non_power_of_two "
-			"GL_ARB_transpose_matrix "
-			"GL_ARB_vertex_program "
-			"GL_ARB_window_pos "
-			"GL_EXT_abgr "
-			"GL_EXT_bgra "
- 			"GL_EXT_blend_color "
-			"GL_EXT_blend_equation_separate "
-			"GL_EXT_blend_func_separate "
-			"GL_EXT_blend_logic_op "
- 			"GL_EXT_blend_minmax "
- 			"GL_EXT_blend_subtract "
-			"GL_EXT_clip_volume_hint "
-			"GL_EXT_copy_texture "
-			"GL_EXT_draw_range_elements "
-			"GL_EXT_fog_coord "
-			"GL_EXT_framebuffer_object "
-			"GL_EXT_multi_draw_arrays "
-			"GL_EXT_packed_pixels "
-			"GL_EXT_paletted_texture "
-			"GL_EXT_point_parameters "
-			"GL_EXT_polygon_offset "
-			"GL_EXT_rescale_normal "
-			"GL_EXT_secondary_color "
-			"GL_EXT_separate_specular_color "
-			"GL_EXT_shadow_funcs "
-			"GL_EXT_shared_texture_palette "
- 			"GL_EXT_stencil_two_side "
-			"GL_EXT_stencil_wrap "
-			"GL_EXT_subtexture "
-			"GL_EXT_texture "
-			"GL_EXT_texture3D "
-			"GL_EXT_texture_compression_dxt1 "
-			"GL_EXT_texture_compression_s3tc "
-			"GL_EXT_texture_edge_clamp "
- 			"GL_EXT_texture_env_add "
- 			"GL_EXT_texture_env_combine "
- 			"GL_EXT_texture_env_dot3 "
- 			"GL_EXT_texture_filter_anisotropic "
-			"GL_EXT_texture_lod "
- 			"GL_EXT_texture_lod_bias "
- 			"GL_EXT_texture_mirror_clamp "
-			"GL_EXT_texture_object "
-			"GL_EXT_texture_rectangle "
-			"GL_EXT_vertex_array "
-			"GL_3DFX_texture_compression_FXT1 "
-			"GL_APPLE_packed_pixels "
-			"GL_ATI_draw_buffers "
-			"GL_ATI_texture_env_combine3 "
-			"GL_ATI_texture_mirror_once "
- 			"GL_HP_occlusion_test "
-			"GL_IBM_texture_mirrored_repeat "
-			"GL_INGR_blend_func_separate "
-			"GL_MESA_pack_invert "
-			"GL_MESA_ycbcr_texture "
-			"GL_NV_blend_square "
-			"GL_NV_depth_clamp "
-			"GL_NV_fog_distance "
-			"GL_NV_fragment_program "
-			"GL_NV_fragment_program_option "
-			"GL_NV_fragment_program2 "
-			"GL_NV_light_max_exponent "
-			"GL_NV_multisample_filter_hint "
-			"GL_NV_point_sprite "
-			"GL_NV_texgen_reflection "
-			"GL_NV_texture_compression_vtc "
-			"GL_NV_texture_env_combine4 "
-			"GL_NV_texture_expand_normal "
-			"GL_NV_texture_rectangle "
-			"GL_NV_vertex_program "
-			"GL_NV_vertex_program1_1 "
-			"GL_NV_vertex_program2 "
-			"GL_NV_vertex_program2_option "
-			"GL_NV_vertex_program3 "
-			"GL_OES_compressed_paletted_texture "
-			"GL_SGI_color_matrix "
-			"GL_SGI_color_table "
-			"GL_SGIS_generate_mipmap "
-			"GL_SGIS_multisample "
-			"GL_SGIS_point_parameters "
-			"GL_SGIS_texture_border_clamp "
-			"GL_SGIS_texture_edge_clamp "
-			"GL_SGIS_texture_lod "
-			"GL_SGIX_depth_texture "
-			"GL_SGIX_shadow "
-			"GL_SGIX_shadow_ambient "
-			"GL_SUN_slice_accum "
-			;
-
-/*
-** We have made the simplifying assuption that the same extensions are 
-** supported across all screens in a multi-screen system.
-*/
-static char GLXServerVendorName[] = "SGI";
-unsigned glxMajorVersion = SERVER_GLX_MAJOR_VERSION;
-unsigned glxMinorVersion = SERVER_GLX_MINOR_VERSION;
-static char GLXServerExtensions[] =
-			"GLX_ARB_multisample "
-			"GLX_EXT_visual_info "
-			"GLX_EXT_visual_rating "
-			"GLX_EXT_import_context "
-                        "GLX_EXT_texture_from_pixmap "
-			"GLX_OML_swap_method "
-			"GLX_SGI_make_current_read "
-#ifndef __APPLE__
-			"GLX_SGIS_multisample "
-                        "GLX_SGIX_hyperpipe "
-                        "GLX_SGIX_swap_barrier "
-#endif
-			"GLX_SGIX_fbconfig "
-			"GLX_SGIX_pbuffer "
-			"GLX_MESA_copy_sub_buffer "
-			;
-
-/*
- * If your DDX driver wants to register support for swap barriers or hyperpipe
- * topology, it should call __glXHyperpipeInit() or __glXSwapBarrierInit()
- * with a dispatch table of functions to handle the requests.   In the XFree86
- * DDX, for example, you would call these near the bottom of the driver's
- * ScreenInit method, after DRI has been initialized.
- *
- * This should be replaced with a better method when we teach the server how
- * to load DRI drivers.
- */
-
-void __glXHyperpipeInit(int screen, __GLXHyperpipeExtensionFuncs *funcs)
-{
-    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
-
-    pGlxScreen->hyperpipeFuncs = funcs;
-}
-
-void __glXSwapBarrierInit(int screen, __GLXSwapBarrierExtensionFuncs *funcs)
-{
-    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
-
-    pGlxScreen->swapBarrierFuncs = funcs;
-}
-
-static Bool
-glxCloseScreen (int index, ScreenPtr pScreen)
-{
-    __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
-
-    pScreen->CloseScreen = pGlxScreen->CloseScreen;
-    pScreen->DestroyWindow = pGlxScreen->DestroyWindow;
-
-    pGlxScreen->destroy(pGlxScreen);
-
-    return pScreen->CloseScreen(index, pScreen);
-}
-
-__GLXscreen *
-glxGetScreen(ScreenPtr pScreen)
-{
-    return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey);
-}
-
-_X_EXPORT void GlxSetVisualConfigs(int nconfigs,
-                         void *configs, void **privates)
-{
-    /* We keep this stub around for the DDX drivers that still
-     * call it. */
-}
-
-GLint glxConvertToXVisualType(int visualType)
-{
-    static const int x_visual_types[] = {
-	TrueColor,   DirectColor,
-	PseudoColor, StaticColor,
-	GrayScale,   StaticGray
-    };
-
-    return ( (unsigned) (visualType - GLX_TRUE_COLOR) < 6 )
-	? x_visual_types[ visualType - GLX_TRUE_COLOR ] : -1;
-}
-
-/* This code inspired by composite/compinit.c.  We could move this to
- * mi/ and share it with composite.*/
-
-static VisualPtr
-AddScreenVisuals(ScreenPtr pScreen, int count, int d)
-{
-    int		 i;
-    DepthPtr	 depth;
-
-    depth = NULL;
-    for (i = 0; i < pScreen->numDepths; i++) {
-	if (pScreen->allowedDepths[i].depth == d) {
-	    depth = &pScreen->allowedDepths[i];
-	    break;
-	}
-    }
-    if (depth == NULL)
-	return NULL;
-
-    if (ResizeVisualArray(pScreen, count, depth) == FALSE)
-        return NULL;
-
-    /* Return a pointer to the first of the added visuals. */ 
-    return pScreen->visuals + pScreen->numVisuals - count;
-}
-
-static int
-findFirstSet(unsigned int v)
-{
-    int i;
-
-    for (i = 0; i < 32; i++)
-	if (v & (1 << i))
-	    return i;
-
-    return -1;
-}
-
-static void
-initGlxVisual(VisualPtr visual, __GLXconfig *config)
-{
-    int maxBits;
-    maxBits = max(config->redBits, max(config->greenBits, config->blueBits));
-
-    config->visualID = visual->vid;
-    visual->class = glxConvertToXVisualType(config->visualType);
-    visual->bitsPerRGBValue = maxBits;
-    visual->ColormapEntries = 1 << maxBits;
-    visual->nplanes = config->redBits + config->greenBits + config->blueBits;
-
-    visual->redMask = config->redMask;
-    visual->greenMask = config->greenMask;
-    visual->blueMask = config->blueMask;
-    visual->offsetRed = findFirstSet(config->redMask);
-    visual->offsetGreen = findFirstSet(config->greenMask);
-    visual->offsetBlue = findFirstSet(config->blueMask);
-}
-
-static __GLXconfig *
-pickFBConfig(__GLXscreen *pGlxScreen, VisualPtr visual)
-{
-    __GLXconfig *best = NULL, *config;
-    int best_score = 0;
-
-    for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
-	int score = 0;
-
-	if (config->redMask != visual->redMask ||
-	    config->greenMask != visual->greenMask ||
-	    config->blueMask != visual->blueMask)
-	    continue;
-	if (config->visualRating != GLX_NONE)
-	    continue;
-	if (glxConvertToXVisualType(config->visualType) != visual->class)
-	    continue;
-	/* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */
-	if (visual->nplanes == 32 && config->rgbBits != 32)
-	    continue;
-	/* Can't use the same FBconfig for multiple X visuals.  I think. */
-	if (config->visualID != 0)
-	    continue;
-
-	if (config->doubleBufferMode > 0)
-	    score += 8;
-	if (config->depthBits > 0)
-	    score += 4;
-	if (config->stencilBits > 0)
-	    score += 2;
-	if (config->alphaBits > 0)
-	    score++;
-
-	if (score > best_score) {
-	    best = config;
-	    best_score = score;
-	}
-    }
-
-    return best;
-}
-
-static Bool
-glxDestroyWindow(WindowPtr pWin)
-{
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
-    Bool retval = TRUE;
-
-    FreeResource(pWin->drawable.id, FALSE);
-
-    /* call lower wrapped functions */
-    if (pGlxScreen->DestroyWindow) {
-	/* unwrap */
-	pScreen->DestroyWindow = pGlxScreen->DestroyWindow;
-
-	/* call lower layers */
-	retval = (*pScreen->DestroyWindow)(pWin);
-
-	/* rewrap */
-	pGlxScreen->DestroyWindow = pScreen->DestroyWindow;
-	pScreen->DestroyWindow = glxDestroyWindow;
-    }
-
-    return retval;
-}
-
-void __glXScreenInit(__GLXscreen *pGlxScreen, ScreenPtr pScreen)
-{
-    __GLXconfig *m;
-    __GLXconfig *config;
-    int i;
-
-    pGlxScreen->pScreen       = pScreen;
-    pGlxScreen->GLextensions  = xstrdup(GLServerExtensions);
-    pGlxScreen->GLXvendor     = xstrdup(GLXServerVendorName);
-    pGlxScreen->GLXextensions = xstrdup(GLXServerExtensions);
-
-    /* All GLX providers must support all of the functionality required for at
-     * least GLX 1.2.  If the provider supports a higher version, the GLXminor
-     * version can be changed in the provider's screen-probe routine.  For
-     * most providers, the screen-probe routine is the caller of this
-     * function.
-     */
-    pGlxScreen->GLXmajor      = 1;
-    pGlxScreen->GLXminor      = 2;
-
-    pGlxScreen->CloseScreen = pScreen->CloseScreen;
-    pScreen->CloseScreen = glxCloseScreen;
-    pGlxScreen->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = glxDestroyWindow;
-
-    i = 0;
-    for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) {
-	m->fbconfigID = FakeClientID(0);
-	m->visualID = 0;
-	i++;
-    }
-    pGlxScreen->numFBConfigs = i;
-
-    pGlxScreen->visuals =
-	xcalloc(pGlxScreen->numFBConfigs, sizeof (__GLXconfig *));
-
-    /* First, try to choose featureful FBconfigs for the existing X visuals.
-     * Note that if multiple X visuals end up with the same FBconfig being
-     * chosen, the later X visuals don't get GLX visuals (because we want to
-     * prioritize the root visual being GLX).
-     */
-    for (i = 0; i < pScreen->numVisuals; i++) {
-	VisualPtr visual = &pScreen->visuals[i];
-
-	config = pickFBConfig(pGlxScreen, visual);
-	if (config) {
-	    pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
-	    config->visualID = visual->vid;
-	}
-    }
-
-    /* Then, add new visuals corresponding to all FBconfigs that didn't have
-     * an existing, appropriate visual.
-     */
-    for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
-	int depth;
-
-	VisualPtr visual;
-
-	if (config->visualID != 0)
-	    continue;
-
-	/* Only count RGB bits and not alpha, as we're not trying to create
-	 * visuals for compositing (that's what the 32-bit composite visual
-	 * set up above is for.
-	 */
-	depth = config->redBits + config->greenBits + config->blueBits;
-
-	/* Make sure that our FBconfig's depth can actually be displayed
-	 * (corresponds to an existing visual).
-	 */
-	for (i = 0; i < pScreen->numVisuals; i++) {
-	    if (depth == pScreen->visuals[i].nplanes)
-		break;
-	}
-	if (i == pScreen->numVisuals)
-	    continue;
-
-	/* Create a new X visual for our FBconfig. */
-	visual = AddScreenVisuals(pScreen, 1, depth);
-	if (visual == NULL)
-	    continue;
-
-	pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
-	initGlxVisual(visual, config);
-    }
-
-    dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen);
-}
-
-void __glXScreenDestroy(__GLXscreen *screen)
-{
-    xfree(screen->GLXvendor);
-    xfree(screen->GLXextensions);
-    xfree(screen->GLextensions);
-}
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. 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 including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * 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
+ * SILICON GRAPHICS, INC. 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 of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#else
+
+#include "glheader.h"
+
+#endif
+
+#include <GL/glxtokens.h>
+#include <string.h>
+#include <windowstr.h>
+#include <os.h>
+#include <colormapst.h>
+
+#include "privates.h"
+#include "glxserver.h"
+#include "glxutil.h"
+#include "glxext.h"
+#include "protocol-versions.h"
+
+static int glxScreenPrivateKeyIndex;
+static DevPrivateKey glxScreenPrivateKey = &glxScreenPrivateKeyIndex;
+
+const char GLServerVersion[] = "1.4";
+static const char GLServerExtensions[] = 
+			"GL_ARB_depth_texture "
+			"GL_ARB_draw_buffers "
+			"GL_ARB_fragment_program "
+			"GL_ARB_fragment_program_shadow "
+			"GL_ARB_imaging "
+			"GL_ARB_multisample "
+			"GL_ARB_multitexture "
+			"GL_ARB_occlusion_query "
+			"GL_ARB_point_parameters "
+			"GL_ARB_point_sprite "
+			"GL_ARB_shadow "
+			"GL_ARB_shadow_ambient "
+			"GL_ARB_texture_border_clamp "
+			"GL_ARB_texture_compression "
+			"GL_ARB_texture_cube_map "
+			"GL_ARB_texture_env_add "
+			"GL_ARB_texture_env_combine "
+			"GL_ARB_texture_env_crossbar "
+			"GL_ARB_texture_env_dot3 "
+			"GL_ARB_texture_mirrored_repeat "
+			"GL_ARB_texture_non_power_of_two "
+			"GL_ARB_transpose_matrix "
+			"GL_ARB_vertex_program "
+			"GL_ARB_window_pos "
+			"GL_EXT_abgr "
+			"GL_EXT_bgra "
+ 			"GL_EXT_blend_color "
+			"GL_EXT_blend_equation_separate "
+			"GL_EXT_blend_func_separate "
+			"GL_EXT_blend_logic_op "
+ 			"GL_EXT_blend_minmax "
+ 			"GL_EXT_blend_subtract "
+			"GL_EXT_clip_volume_hint "
+			"GL_EXT_copy_texture "
+			"GL_EXT_draw_range_elements "
+			"GL_EXT_fog_coord "
+			"GL_EXT_framebuffer_object "
+			"GL_EXT_multi_draw_arrays "
+			"GL_EXT_packed_pixels "
+			"GL_EXT_paletted_texture "
+			"GL_EXT_point_parameters "
+			"GL_EXT_polygon_offset "
+			"GL_EXT_rescale_normal "
+			"GL_EXT_secondary_color "
+			"GL_EXT_separate_specular_color "
+			"GL_EXT_shadow_funcs "
+			"GL_EXT_shared_texture_palette "
+ 			"GL_EXT_stencil_two_side "
+			"GL_EXT_stencil_wrap "
+			"GL_EXT_subtexture "
+			"GL_EXT_texture "
+			"GL_EXT_texture3D "
+			"GL_EXT_texture_compression_dxt1 "
+			"GL_EXT_texture_compression_s3tc "
+			"GL_EXT_texture_edge_clamp "
+ 			"GL_EXT_texture_env_add "
+ 			"GL_EXT_texture_env_combine "
+ 			"GL_EXT_texture_env_dot3 "
+ 			"GL_EXT_texture_filter_anisotropic "
+			"GL_EXT_texture_lod "
+ 			"GL_EXT_texture_lod_bias "
+ 			"GL_EXT_texture_mirror_clamp "
+			"GL_EXT_texture_object "
+			"GL_EXT_texture_rectangle "
+			"GL_EXT_vertex_array "
+			"GL_3DFX_texture_compression_FXT1 "
+			"GL_APPLE_packed_pixels "
+			"GL_ATI_draw_buffers "
+			"GL_ATI_texture_env_combine3 "
+			"GL_ATI_texture_mirror_once "
+ 			"GL_HP_occlusion_test "
+			"GL_IBM_texture_mirrored_repeat "
+			"GL_INGR_blend_func_separate "
+			"GL_MESA_pack_invert "
+			"GL_MESA_ycbcr_texture "
+			"GL_NV_blend_square "
+			"GL_NV_depth_clamp "
+			"GL_NV_fog_distance "
+			"GL_NV_fragment_program "
+			"GL_NV_fragment_program_option "
+			"GL_NV_fragment_program2 "
+			"GL_NV_light_max_exponent "
+			"GL_NV_multisample_filter_hint "
+			"GL_NV_point_sprite "
+			"GL_NV_texgen_reflection "
+			"GL_NV_texture_compression_vtc "
+			"GL_NV_texture_env_combine4 "
+			"GL_NV_texture_expand_normal "
+			"GL_NV_texture_rectangle "
+			"GL_NV_vertex_program "
+			"GL_NV_vertex_program1_1 "
+			"GL_NV_vertex_program2 "
+			"GL_NV_vertex_program2_option "
+			"GL_NV_vertex_program3 "
+			"GL_OES_compressed_paletted_texture "
+			"GL_SGI_color_matrix "
+			"GL_SGI_color_table "
+			"GL_SGIS_generate_mipmap "
+			"GL_SGIS_multisample "
+			"GL_SGIS_point_parameters "
+			"GL_SGIS_texture_border_clamp "
+			"GL_SGIS_texture_edge_clamp "
+			"GL_SGIS_texture_lod "
+			"GL_SGIX_depth_texture "
+			"GL_SGIX_shadow "
+			"GL_SGIX_shadow_ambient "
+			"GL_SUN_slice_accum "
+			;
+
+/*
+** We have made the simplifying assuption that the same extensions are 
+** supported across all screens in a multi-screen system.
+*/
+static char GLXServerVendorName[] = "SGI";
+unsigned glxMajorVersion = SERVER_GLX_MAJOR_VERSION;
+unsigned glxMinorVersion = SERVER_GLX_MINOR_VERSION;
+static char GLXServerExtensions[] =
+			"GLX_ARB_multisample "
+			"GLX_EXT_visual_info "
+			"GLX_EXT_visual_rating "
+			"GLX_EXT_import_context "
+                        "GLX_EXT_texture_from_pixmap "
+			"GLX_OML_swap_method "
+			"GLX_SGI_make_current_read "
+#ifndef __APPLE__
+			"GLX_SGIS_multisample "
+                        "GLX_SGIX_hyperpipe "
+                        "GLX_SGIX_swap_barrier "
+#endif
+			"GLX_SGIX_fbconfig "
+			"GLX_SGIX_pbuffer "
+			"GLX_MESA_copy_sub_buffer "
+			;
+
+/*
+ * If your DDX driver wants to register support for swap barriers or hyperpipe
+ * topology, it should call __glXHyperpipeInit() or __glXSwapBarrierInit()
+ * with a dispatch table of functions to handle the requests.   In the XFree86
+ * DDX, for example, you would call these near the bottom of the driver's
+ * ScreenInit method, after DRI has been initialized.
+ *
+ * This should be replaced with a better method when we teach the server how
+ * to load DRI drivers.
+ */
+
+void __glXHyperpipeInit(int screen, __GLXHyperpipeExtensionFuncs *funcs)
+{
+    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+
+    pGlxScreen->hyperpipeFuncs = funcs;
+}
+
+void __glXSwapBarrierInit(int screen, __GLXSwapBarrierExtensionFuncs *funcs)
+{
+    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+
+    pGlxScreen->swapBarrierFuncs = funcs;
+}
+
+static Bool
+glxCloseScreen (int index, ScreenPtr pScreen)
+{
+    __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
+
+    pScreen->CloseScreen = pGlxScreen->CloseScreen;
+    pScreen->DestroyWindow = pGlxScreen->DestroyWindow;
+
+    pGlxScreen->destroy(pGlxScreen);
+
+    return pScreen->CloseScreen(index, pScreen);
+}
+
+__GLXscreen *
+glxGetScreen(ScreenPtr pScreen)
+{
+    return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey);
+}
+
+_X_EXPORT void GlxSetVisualConfigs(int nconfigs,
+                         void *configs, void **privates)
+{
+    /* We keep this stub around for the DDX drivers that still
+     * call it. */
+}
+
+GLint glxConvertToXVisualType(int visualType)
+{
+    static const int x_visual_types[] = {
+	TrueColor,   DirectColor,
+	PseudoColor, StaticColor,
+	GrayScale,   StaticGray
+    };
+
+    return ( (unsigned) (visualType - GLX_TRUE_COLOR) < 6 )
+	? x_visual_types[ visualType - GLX_TRUE_COLOR ] : -1;
+}
+
+/* This code inspired by composite/compinit.c.  We could move this to
+ * mi/ and share it with composite.*/
+
+static VisualPtr
+AddScreenVisuals(ScreenPtr pScreen, int count, int d)
+{
+    int		 i;
+    DepthPtr	 depth;
+
+    depth = NULL;
+    for (i = 0; i < pScreen->numDepths; i++) {
+	if (pScreen->allowedDepths[i].depth == d) {
+	    depth = &pScreen->allowedDepths[i];
+	    break;
+	}
+    }
+    if (depth == NULL)
+	return NULL;
+
+    if (ResizeVisualArray(pScreen, count, depth) == FALSE)
+        return NULL;
+
+    /* Return a pointer to the first of the added visuals. */ 
+    return pScreen->visuals + pScreen->numVisuals - count;
+}
+
+static int
+findFirstSet(unsigned int v)
+{
+    int i;
+
+    for (i = 0; i < 32; i++)
+	if (v & (1 << i))
+	    return i;
+
+    return -1;
+}
+
+static void
+initGlxVisual(VisualPtr visual, __GLXconfig *config)
+{
+    int maxBits;
+    maxBits = max(config->redBits, max(config->greenBits, config->blueBits));
+
+    config->visualID = visual->vid;
+    visual->class = glxConvertToXVisualType(config->visualType);
+    visual->bitsPerRGBValue = maxBits;
+    visual->ColormapEntries = 1 << maxBits;
+    visual->nplanes = config->redBits + config->greenBits + config->blueBits;
+
+    visual->redMask = config->redMask;
+    visual->greenMask = config->greenMask;
+    visual->blueMask = config->blueMask;
+    visual->offsetRed = findFirstSet(config->redMask);
+    visual->offsetGreen = findFirstSet(config->greenMask);
+    visual->offsetBlue = findFirstSet(config->blueMask);
+}
+
+static __GLXconfig *
+pickFBConfig(__GLXscreen *pGlxScreen, VisualPtr visual)
+{
+    __GLXconfig *best = NULL, *config;
+    int best_score = 0;
+
+    for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
+	int score = 0;
+
+	if (config->redMask != visual->redMask ||
+	    config->greenMask != visual->greenMask ||
+	    config->blueMask != visual->blueMask)
+	    continue;
+	if (config->visualRating != GLX_NONE)
+	    continue;
+	if (glxConvertToXVisualType(config->visualType) != visual->class)
+	    continue;
+	/* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */
+	if (visual->nplanes == 32 && config->rgbBits != 32)
+	    continue;
+	/* Can't use the same FBconfig for multiple X visuals.  I think. */
+	if (config->visualID != 0)
+	    continue;
+
+	if (config->doubleBufferMode > 0)
+	    score += 8;
+	if (config->depthBits > 0)
+	    score += 4;
+	if (config->stencilBits > 0)
+	    score += 2;
+	if (config->alphaBits > 0)
+	    score++;
+
+	if (score > best_score) {
+	    best = config;
+	    best_score = score;
+	}
+    }
+
+    return best;
+}
+
+static Bool
+glxDestroyWindow(WindowPtr pWin)
+{
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
+    Bool retval = TRUE;
+
+    FreeResource(pWin->drawable.id, FALSE);
+
+    /* call lower wrapped functions */
+    if (pGlxScreen->DestroyWindow) {
+	/* unwrap */
+	pScreen->DestroyWindow = pGlxScreen->DestroyWindow;
+
+	/* call lower layers */
+	retval = (*pScreen->DestroyWindow)(pWin);
+
+	/* rewrap */
+	pGlxScreen->DestroyWindow = pScreen->DestroyWindow;
+	pScreen->DestroyWindow = glxDestroyWindow;
+    }
+
+    return retval;
+}
+
+void __glXScreenInit(__GLXscreen *pGlxScreen, ScreenPtr pScreen)
+{
+    __GLXconfig *m;
+    __GLXconfig *config;
+    int i;
+
+    pGlxScreen->pScreen       = pScreen;
+    pGlxScreen->GLextensions  = xstrdup(GLServerExtensions);
+    pGlxScreen->GLXvendor     = xstrdup(GLXServerVendorName);
+    pGlxScreen->GLXextensions = xstrdup(GLXServerExtensions);
+
+    /* All GLX providers must support all of the functionality required for at
+     * least GLX 1.2.  If the provider supports a higher version, the GLXminor
+     * version can be changed in the provider's screen-probe routine.  For
+     * most providers, the screen-probe routine is the caller of this
+     * function.
+     */
+    pGlxScreen->GLXmajor      = 1;
+    pGlxScreen->GLXminor      = 2;
+
+    pGlxScreen->CloseScreen = pScreen->CloseScreen;
+    pScreen->CloseScreen = glxCloseScreen;
+    pGlxScreen->DestroyWindow = pScreen->DestroyWindow;
+    pScreen->DestroyWindow = glxDestroyWindow;
+
+    i = 0;
+    for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) {
+	m->fbconfigID = FakeClientID(0);
+	m->visualID = 0;
+	i++;
+    }
+    pGlxScreen->numFBConfigs = i;
+
+    pGlxScreen->visuals =
+	xcalloc(pGlxScreen->numFBConfigs, sizeof (__GLXconfig *));
+
+    /* First, try to choose featureful FBconfigs for the existing X visuals.
+     * Note that if multiple X visuals end up with the same FBconfig being
+     * chosen, the later X visuals don't get GLX visuals (because we want to
+     * prioritize the root visual being GLX).
+     */
+    for (i = 0; i < pScreen->numVisuals; i++) {
+	VisualPtr visual = &pScreen->visuals[i];
+
+	config = pickFBConfig(pGlxScreen, visual);
+	if (config) {
+	    pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
+	    config->visualID = visual->vid;
+	}
+    }
+
+    /* Then, add new visuals corresponding to all FBconfigs that didn't have
+     * an existing, appropriate visual.
+     */
+    for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
+	int depth;
+
+	VisualPtr visual;
+
+	if (config->visualID != 0)
+	    continue;
+
+	/* Only count RGB bits and not alpha, as we're not trying to create
+	 * visuals for compositing (that's what the 32-bit composite visual
+	 * set up above is for.
+	 */
+	depth = config->redBits + config->greenBits + config->blueBits;
+
+	/* Make sure that our FBconfig's depth can actually be displayed
+	 * (corresponds to an existing visual).
+	 */
+	for (i = 0; i < pScreen->numVisuals; i++) {
+	    if (depth == pScreen->visuals[i].nplanes)
+		break;
+	}
+	if (i == pScreen->numVisuals)
+	    continue;
+
+	/* Create a new X visual for our FBconfig. */
+	visual = AddScreenVisuals(pScreen, 1, depth);
+	if (visual == NULL)
+	    continue;
+
+	pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
+	initGlxVisual(visual, config);
+    }
+
+    dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen);
+}
+
+void __glXScreenDestroy(__GLXscreen *screen)
+{
+    xfree(screen->GLXvendor);
+    xfree(screen->GLXextensions);
+    xfree(screen->GLextensions);
+}