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+/* $XFree86: xc/programs/Xserver/GL/glx/glxscreens.c,v 1.14 2004/02/09 23:46:31 alanh Exp $ */
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifdef IN_MODULE
+#include <xf86_ansic.h>
+#else
+#include <string.h>
+#include <signal.h>
+#endif
+
+#include <windowstr.h>
+
+#include "glxserver.h"
+#include "glxutil.h"
+#include "glxext.h"
+
+const char GLServerVersion[] = "1.2";
+static const char GLServerExtensions[] =
+ "GL_ARB_depth_texture "
+ "GL_ARB_imaging "
+ "GL_ARB_multitexture "
+ "GL_ARB_point_parameters "
+ "GL_ARB_point_sprite "
+ "GL_ARB_shadow "
+ "GL_ARB_shadow_ambient "
+ "GL_ARB_texture_border_clamp "
+ "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_transpose_matrix "
+ "GL_ARB_window_pos "
+ "GL_EXT_abgr "
+ "GL_EXT_bgra "
+ "GL_EXT_blend_color "
+ "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_multi_draw_arrays "
+ "GL_EXT_packed_pixels "
+ "GL_EXT_polygon_offset "
+ "GL_EXT_rescale_normal "
+ "GL_EXT_secondary_color "
+ "GL_EXT_separate_specular_color "
+ "GL_EXT_shadow_funcs "
+ "GL_EXT_stencil_two_side "
+ "GL_EXT_stencil_wrap "
+ "GL_EXT_subtexture "
+ "GL_EXT_texture "
+ "GL_EXT_texture3D "
+ "GL_EXT_texture_edge_clamp "
+ "GL_EXT_texture_env_add "
+ "GL_EXT_texture_env_combine "
+ "GL_EXT_texture_env_dot3 "
+ "GL_EXT_texture_lod "
+ "GL_EXT_texture_lod_bias "
+ "GL_EXT_texture_object "
+ "GL_EXT_texture_rectangle "
+ "GL_EXT_vertex_array "
+ "GL_APPLE_packed_pixels "
+ "GL_ATI_texture_mirror_once "
+ "GL_ATI_texture_env_combine3 "
+ "GL_HP_occlusion_test "
+ "GL_IBM_texture_mirrored_repeat "
+ "GL_MESA_pack_invert "
+ "GL_MESA_ycbcr_texture "
+ "GL_NV_blend_square "
+ "GL_NV_point_sprite "
+ "GL_NV_texgen_reflection "
+ "GL_NV_texture_rectangle "
+ "GL_SGIS_generate_mipmap "
+ "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 "
+ ;
+
+/*
+** We have made the simplifying assuption that the same extensions are
+** supported across all screens in a multi-screen system.
+*/
+static char GLXServerVendorName[] = "SGI";
+static char GLXServerVersion[] = "1.2";
+static char GLXServerExtensions[] =
+ "GLX_ARB_multisample "
+ "GLX_EXT_visual_info "
+ "GLX_EXT_visual_rating "
+ "GLX_EXT_import_context "
+ "GLX_OML_swap_method "
+ "GLX_SGI_make_current_read "
+#ifndef __DARWIN__
+ "GLX_SGIS_multisample "
+ "GLX_SGIX_hyperpipe "
+ "GLX_SGIX_swap_barrier "
+#endif
+ "GLX_SGIX_fbconfig "
+ ;
+
+/*
+ * __glDDXScreenInfo comes from GLcore, so we can't resolve this symbol at
+ * module open time. Leave a placeholder, and fill this in when we first
+ * need it (in __glXScreenInit). XXX Why make this an array?
+ */
+static __GLXscreenInfo *__glXScreens[] = {
+ NULL /* &__glDDXScreenInfo */ ,
+};
+
+static GLint __glXNumStaticScreens =
+ (sizeof __glXScreens / sizeof __glXScreens[0]);
+
+__GLXscreenInfo *__glXActiveScreens;
+GLint __glXNumActiveScreens;
+
+__GLXSwapBarrierExtensionFuncs *__glXSwapBarrierFuncs = NULL;
+static int __glXNumSwapBarrierFuncs = 0;
+__GLXHyperpipeExtensionFuncs *__glXHyperpipeFuncs = NULL;
+static int __glXNumHyperpipeFuncs = 0;
+
+
+RESTYPE __glXDrawableRes;
+
+__GLXscreenInfo *__glXgetActiveScreen(int num) {
+ return &__glXActiveScreens[num];
+}
+
+/*
+** Destroy routine that gets called when a drawable is freed. A drawable
+** contains the ancillary buffers needed for rendering.
+*/
+static Bool DrawableGone(__GLXdrawablePrivate *glxPriv, XID xid)
+{
+ __GLXcontext *cx, *cx1;
+
+ /*
+ ** Use glxPriv->type to figure out what kind of drawable this is. Don't
+ ** use glxPriv->pDraw->type because by the time this routine is called,
+ ** the pDraw might already have been freed.
+ */
+ if (glxPriv->type == DRAWABLE_WINDOW) {
+ /*
+ ** When a window is destroyed, notify all context bound to
+ ** it, that there are no longer bound to anything.
+ */
+ for (cx = glxPriv->drawGlxc; cx; cx = cx1) {
+ cx1 = cx->nextDrawPriv;
+ cx->pendingState |= __GLX_PENDING_DESTROY;
+ }
+
+ for (cx = glxPriv->readGlxc; cx; cx = cx1) {
+ cx1 = cx->nextReadPriv;
+ cx->pendingState |= __GLX_PENDING_DESTROY;
+ }
+ }
+
+ /*
+ ** set the size to 0, so that context that may still be using this
+ ** drawable not do anything harmful
+ */
+ glxPriv->xorigin = 0;
+ glxPriv->yorigin = 0;
+ glxPriv->width = 0;
+ glxPriv->height = 0;
+
+ __glXUnrefDrawablePrivate(glxPriv);
+
+ return True;
+}
+
+/*
+** This hook gets called when a window moves or changes size.
+*/
+static Bool PositionWindow(WindowPtr pWin, int x, int y)
+{
+ ScreenPtr pScreen;
+ __GLXcontext *glxc;
+ __GLXdrawablePrivate *glxPriv;
+ Bool ret;
+
+ /*
+ ** Call wrapped position window routine
+ */
+ pScreen = pWin->drawable.pScreen;
+ pScreen->PositionWindow =
+ __glXActiveScreens[pScreen->myNum].WrappedPositionWindow;
+ ret = (*pScreen->PositionWindow)(pWin, x, y);
+ pScreen->PositionWindow = PositionWindow;
+
+ /*
+ ** Tell all contexts rendering into this window that the window size
+ ** has changed.
+ */
+ glxPriv = (__GLXdrawablePrivate *) LookupIDByType(pWin->drawable.id,
+ __glXDrawableRes);
+ if (glxPriv == NULL) {
+ /*
+ ** This window is not being used by the OpenGL.
+ */
+ return ret;
+ }
+
+ /*
+ ** resize the drawable
+ */
+ /* first change the drawable size */
+ if (__glXResizeDrawableBuffers(glxPriv) == GL_FALSE) {
+ /* resize failed! */
+ /* XXX: what can we possibly do here? */
+ ret = False;
+ }
+
+ /* mark contexts as needing resize */
+
+ for (glxc = glxPriv->drawGlxc; glxc; glxc = glxc->nextDrawPriv) {
+ glxc->pendingState |= __GLX_PENDING_RESIZE;
+ }
+
+ for (glxc = glxPriv->readGlxc; glxc; glxc = glxc->nextReadPriv) {
+ glxc->pendingState |= __GLX_PENDING_RESIZE;
+ }
+
+ return ret;
+}
+
+/*
+** Wrap our own PositionWindow routine around the server's, so we can
+** be notified when a window changes size
+*/
+static void wrapPositionWindow(int screen)
+{
+ ScreenPtr pScreen = screenInfo.screens[screen];
+
+ __glXActiveScreens[screen].WrappedPositionWindow = pScreen->PositionWindow;
+ pScreen->PositionWindow = PositionWindow;
+}
+
+/*
+ * 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)
+{
+ if (__glXNumHyperpipeFuncs < screen + 1) {
+ __glXHyperpipeFuncs = __glXRealloc(__glXHyperpipeFuncs,
+ (screen+1) * sizeof(__GLXHyperpipeExtensionFuncs));
+ __glXNumHyperpipeFuncs = screen + 1;
+ }
+
+ __glXHyperpipeFuncs[screen].queryHyperpipeNetworkFunc =
+ *funcs->queryHyperpipeNetworkFunc;
+ __glXHyperpipeFuncs[screen].queryHyperpipeConfigFunc =
+ *funcs->queryHyperpipeConfigFunc;
+ __glXHyperpipeFuncs[screen].destroyHyperpipeConfigFunc =
+ *funcs->destroyHyperpipeConfigFunc;
+ __glXHyperpipeFuncs[screen].hyperpipeConfigFunc =
+ *funcs->hyperpipeConfigFunc;
+}
+
+void __glXSwapBarrierInit(int screen, __GLXSwapBarrierExtensionFuncs *funcs)
+{
+ if (__glXNumSwapBarrierFuncs < screen + 1) {
+ __glXSwapBarrierFuncs = __glXRealloc(__glXSwapBarrierFuncs,
+ (screen+1) * sizeof(__GLXSwapBarrierExtensionFuncs));
+ __glXNumSwapBarrierFuncs = screen + 1;
+ }
+
+ __glXSwapBarrierFuncs[screen].bindSwapBarrierFunc =
+ funcs->bindSwapBarrierFunc;
+ __glXSwapBarrierFuncs[screen].queryMaxSwapBarriersFunc =
+ funcs->queryMaxSwapBarriersFunc;
+}
+
+void __glXScreenInit(GLint numscreens)
+{
+ GLint i,j;
+
+ __glXScreens[0] = __glXglDDXScreenInfo(); /* from GLcore */
+
+ /*
+ ** This alloc has to work or else the server might as well core dump.
+ */
+ __glXActiveScreens =
+ (__GLXscreenInfo *) __glXMalloc(sizeof(__GLXscreenInfo) * numscreens);
+
+ for (i=0; i < numscreens; i++) {
+ /*
+ ** Probe each static screen to see which exists.
+ */
+ for (j=0; j < __glXNumStaticScreens; j++) {
+ if ((*__glXScreens[j]->screenProbe)(i)) {
+ __glXActiveScreens[i] = *__glXScreens[j];
+
+ __glXActiveScreens[i].numUsableVisuals = __glXActiveScreens[i].numVisuals;
+ __glXActiveScreens[i].GLextensions = __glXStrdup(GLServerExtensions);
+ __glXActiveScreens[i].GLXvendor = __glXStrdup(GLXServerVendorName);
+ __glXActiveScreens[i].GLXversion = __glXStrdup(GLXServerVersion);
+ __glXActiveScreens[i].GLXextensions = __glXStrdup(GLXServerExtensions);
+
+ __glXDrawableRes = CreateNewResourceType((DeleteType)DrawableGone);
+ wrapPositionWindow(i);
+ }
+ }
+ }
+ __glXNumActiveScreens = numscreens;
+}
+
+void __glXScreenReset(void)
+{
+ int i;
+
+ for (i = 0; i < __glXNumActiveScreens; i++) {
+ __glXFree(__glXActiveScreens[i].GLXvendor);
+ __glXFree(__glXActiveScreens[i].GLXversion);
+ __glXFree(__glXActiveScreens[i].GLXextensions);
+ __glXFree(__glXActiveScreens[i].GLextensions);
+ }
+ xfree(__glXActiveScreens);
+ xfree(__glXHyperpipeFuncs);
+ xfree(__glXSwapBarrierFuncs);
+ __glXNumHyperpipeFuncs = 0;
+ __glXNumSwapBarrierFuncs = 0;
+ __glXHyperpipeFuncs = NULL;
+ __glXSwapBarrierFuncs = NULL;
+ __glXActiveScreens = NULL;
+ __glXNumActiveScreens = 0;
+}