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/* $XFree86: xc/programs/Xserver/GL/glx/glxutil.c,v 1.5 2001/03/21 16:29:37 dawes 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.
**
*/
#define NEED_REPLIES
#define FONT_PCF
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <string.h>
#include "glxserver.h"
#include <GL/glxtokens.h>
#include <unpack.h>
#include <pixmapstr.h>
#include <windowstr.h>
#include "glxutil.h"
#include "GL/internal/glcore.h"
#include "GL/glxint.h"
#include "glcontextmodes.h"
/************************************************************************/
/* Context stuff */
/*
** associate a context with a drawable
*/
void
__glXAssociateContext(__GLXcontext *glxc)
{
glxc->nextDrawPriv = glxc->drawPriv->drawGlxc;
glxc->drawPriv->drawGlxc = glxc;
__glXRefDrawable(glxc->drawPriv);
glxc->nextReadPriv = glxc->readPriv->readGlxc;
glxc->readPriv->readGlxc = glxc;
__glXRefDrawable(glxc->readPriv);
}
/*
** Deassociate a context from a drawable
*/
void
__glXDeassociateContext(__GLXcontext *glxc)
{
__GLXcontext *curr, *prev;
prev = NULL;
for ( curr = glxc->drawPriv->drawGlxc
; curr != NULL
; prev = curr, curr = curr->nextDrawPriv ) {
if (curr == glxc) {
/* found context. Deassociate. */
if (prev == NULL) {
glxc->drawPriv->drawGlxc = curr->nextDrawPriv;
} else {
prev->nextDrawPriv = curr->nextDrawPriv;
}
curr->nextDrawPriv = NULL;
__glXUnrefDrawable(glxc->drawPriv);
break;
}
}
prev = NULL;
for ( curr = glxc->readPriv->readGlxc
; curr != NULL
; prev = curr, curr = curr->nextReadPriv ) {
if (curr == glxc) {
/* found context. Deassociate. */
if (prev == NULL) {
glxc->readPriv->readGlxc = curr->nextReadPriv;
} else {
prev->nextReadPriv = curr->nextReadPriv;
}
curr->nextReadPriv = NULL;
__glXUnrefDrawable(glxc->readPriv);
break;
}
}
}
/*****************************************************************************/
/* Drawable private stuff */
void
__glXRefDrawable(__GLXdrawable *glxPriv)
{
glxPriv->refCount++;
}
void
__glXUnrefDrawable(__GLXdrawable *glxPriv)
{
glxPriv->refCount--;
if (glxPriv->refCount == 0) {
/* remove the drawable from the drawable list */
FreeResourceByType(glxPriv->drawId, __glXDrawableRes, FALSE);
glxPriv->destroy(glxPriv);
}
}
GLboolean
__glXDrawableInit(__GLXdrawable *drawable,
__GLXcontext *ctx, DrawablePtr pDraw, XID drawId)
{
drawable->type = pDraw->type;
drawable->pDraw = pDraw;
drawable->drawId = drawId;
drawable->refCount = 1;
/* if not a pixmap, lookup will fail, so pGlxPixmap will be NULL */
drawable->pGlxPixmap = (__GLXpixmap *)
LookupIDByType(drawId, __glXPixmapRes);
return GL_TRUE;
}
__GLXdrawable *
__glXFindDrawable(XID drawId)
{
__GLXdrawable *glxPriv;
glxPriv = (__GLXdrawable *)LookupIDByType(drawId, __glXDrawableRes);
return glxPriv;
}
__GLXdrawable *
__glXGetDrawable(__GLXcontext *ctx, DrawablePtr pDraw, XID drawId)
{
__GLXdrawable *glxPriv;
glxPriv = __glXFindDrawable(drawId);
if (glxPriv == NULL)
{
glxPriv = ctx->createDrawable(ctx, pDraw, drawId);
/* since we are creating the drawablePrivate, drawId should be new */
if (!AddResource(drawId, __glXDrawableRes, glxPriv))
{
glxPriv->destroy (glxPriv);
return NULL;
}
}
return glxPriv;
}
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