/*
** 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 1.0 (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.
**
** $Date$ $Revision$
** $Header: //depot/main/glx/lib/glxcmds.c#12 $
*/
#include "packsingle.h"
#include "glxclient.h"
#include <extutil.h>
#include <Xext.h>
#include <strings.h>
static const char __glXGLClientExtensions[] =
"GL_ARB_multitexture "
"GL_ARB_imaging "
"GL_EXT_abgr "
"GL_EXT_blend_color "
"GL_EXT_blend_minmax "
"GL_EXT_blend_subtract "
;
static const char __glXGLXClientVendorName[] = "SGI";
static const char __glXGLXClientVersion[] = "1.2";
static const char __glXGLXClientExtensions[] =
"GLX_EXT_visual_info "
"GLX_EXT_visual_rating "
"GLX_EXT_import_context "
;
/*
** Create a new context.
** NOTE: no direct rendering support here, or anywhere else in the library.
*/
static
GLXContext CreateContext(Display *dpy, XVisualInfo *vis,
GLXContext shareList,
Bool allowDirect, GLXContextID contextID)
{
xGLXCreateContextReq *req;
GLXContext gc;
int bufSize = XMaxRequestSize(dpy) * 4;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return NULL;
}
/* Allocate our context record */
gc = (GLXContext) Xmalloc(sizeof(struct __GLXcontextRec));
if (!gc) {
/* Out of memory */
return NULL;
}
memset(gc, 0, sizeof(struct __GLXcontextRec));
/* Allocate transport buffer */
gc->buf = (GLubyte *) Xmalloc(bufSize);
if (!gc->buf) {
Xfree(gc);
return NULL;
}
gc->bufSize = bufSize;
/* Fill in the new context */
gc->renderMode = GL_RENDER;
gc->state.storePack.alignment = 4;
gc->state.storeUnpack.alignment = 4;
__glXInitVertexArrayState(gc);
gc->attributes.stackPointer = &gc->attributes.stack[0];
/*
** PERFORMANCE NOTE: A mode dependent fill image can speed things up.
** Other code uses the fastImageUnpack bit, but it is never set
** to GL_TRUE.
*/
gc->fastImageUnpack = GL_FALSE;
gc->fillImage = __glFillImage;
gc->isDirect = GL_FALSE;
gc->pc = gc->buf;
gc->bufEnd = gc->buf + bufSize;
if (__glXDebug) {
/*
** Set limit register so that there will be one command per packet
*/
gc->limit = gc->buf;
} else {
gc->limit = gc->buf + bufSize - __GLX_BUFFER_LIMIT_SIZE;
}
gc->createDpy = dpy;
gc->majorOpcode = opcode;
/*
** Constrain the maximum drawing command size allowed to be
** transfered using the X_GLXRender protocol request. First
** constrain by a software limit, then constrain by the protocl
** limit.
*/
if (bufSize > __GLX_RENDER_CMD_SIZE_LIMIT) {
bufSize = __GLX_RENDER_CMD_SIZE_LIMIT;
}
if (bufSize > __GLX_MAX_RENDER_CMD_SIZE) {
bufSize = __GLX_MAX_RENDER_CMD_SIZE;
}
gc->maxSmallRenderCommandSize = bufSize;
if (None == contextID) {
/* Send the glXCreateContext request */
LockDisplay(dpy);
GetReq(GLXCreateContext,req);
req->reqType = gc->majorOpcode;
req->glxCode = X_GLXCreateContext;
req->context = gc->xid = XAllocID(dpy);
req->visual = vis->visualid;
req->screen = vis->screen;
req->shareList = shareList ? shareList->xid : None;
req->isDirect = GL_FALSE;
UnlockDisplay(dpy);
SyncHandle();
gc->imported = GL_FALSE;
}
else {
gc->xid = contextID;
gc->imported = GL_TRUE;
}
return gc;
}
GLXContext glXCreateContext(Display *dpy, XVisualInfo *vis,
GLXContext shareList, Bool allowDirect)
{
return CreateContext(dpy, vis, shareList, allowDirect, None);
}
void __glXFreeContext(__GLXcontext *gc)
{
if (gc->vendor) XFree((char *) gc->vendor);
if (gc->renderer) XFree((char *) gc->renderer);
if (gc->version) XFree((char *) gc->version);
if (gc->extensions) XFree((char *) gc->extensions);
__glFreeAttributeState(gc);
XFree((char *) gc->buf);
XFree((char *) gc);
}
/*
** Destroy the named context
*/
static void
DestroyContext(Display *dpy, GLXContext gc)
{
xGLXDestroyContextReq *req;
GLXContextID xid;
CARD8 opcode;
GLboolean imported;
opcode = __glXSetupForCommand(dpy);
if (!opcode || !gc) {
return;
}
__glXLock();
xid = gc->xid;
imported = gc->imported;
gc->xid = None;
if (gc->currentDpy) {
/* Have to free later cuz it's in use now */
__glXUnlock();
} else {
/* Destroy the handle if not current to anybody */
__glXUnlock();
__glXFreeContext(gc);
}
if (!imported) {
/*
** This dpy also created the server side part of the context.
** Send the glXDestroyContext request.
*/
LockDisplay(dpy);
GetReq(GLXDestroyContext,req);
req->reqType = opcode;
req->glxCode = X_GLXDestroyContext;
req->context = xid;
UnlockDisplay(dpy);
SyncHandle();
}
}
void glXDestroyContext(Display *dpy, GLXContext gc)
{
DestroyContext(dpy, gc);
}
/*
** Return the major and minor version #s for the GLX extension
*/
Bool glXQueryVersion(Display *dpy, int *major, int *minor)
{
__GLXdisplayPrivate *priv;
/* Init the extension. This fetches the major and minor version. */
priv = __glXInitialize(dpy);
if (!priv) return GL_FALSE;
if (major) *major = priv->majorVersion;
if (minor) *minor = priv->minorVersion;
return GL_TRUE;
}
/*
** Query the existance of the GLX extension
*/
Bool glXQueryExtension(Display *dpy, int *errorBase, int *eventBase)
{
int major_op, erb, evb;
Bool rv;
rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
if (rv) {
if (errorBase) *errorBase = erb;
if (eventBase) *eventBase = evb;
}
return rv;
}
/*
** Put a barrier in the token stream that forces the GL to finish its
** work before X can proceed.
*/
void glXWaitGL(void)
{
xGLXWaitGLReq *req;
GLXContext gc = __glXGetCurrentContext();
Display *dpy = gc->currentDpy;
if (!dpy) return;
/* Flush any pending commands out */
__glXFlushRenderBuffer(gc, gc->pc);
/* Send the glXWaitGL request */
LockDisplay(dpy);
GetReq(GLXWaitGL,req);
req->reqType = gc->majorOpcode;
req->glxCode = X_GLXWaitGL;
req->contextTag = gc->currentContextTag;
UnlockDisplay(dpy);
SyncHandle();
}
/*
** Put a barrier in the token stream that forces X to finish its
** work before GL can proceed.
*/
void glXWaitX(void)
{
xGLXWaitXReq *req;
GLXContext gc = __glXGetCurrentContext();
Display *dpy = gc->currentDpy;
if (!dpy) return;
/* Flush any pending commands out */
__glXFlushRenderBuffer(gc, gc->pc);
/*
** Send the glXWaitX request.
*/
LockDisplay(dpy);
GetReq(GLXWaitX,req);
req->reqType = gc->majorOpcode;
req->glxCode = X_GLXWaitX;
req->contextTag = gc->currentContextTag;
UnlockDisplay(dpy);
SyncHandle();
}
void glXUseXFont(Font font, int first, int count, int listBase)
{
xGLXUseXFontReq *req;
GLXContext gc = __glXGetCurrentContext();
Display *dpy = gc->currentDpy;
if (!dpy) return;
/* Flush any pending commands out */
(void) __glXFlushRenderBuffer(gc, gc->pc);
/* Send the glXUseFont request */
LockDisplay(dpy);
GetReq(GLXUseXFont,req);
req->reqType = gc->majorOpcode;
req->glxCode = X_GLXUseXFont;
req->contextTag = gc->currentContextTag;
req->font = font;
req->first = first;
req->count = count;
req->listBase = listBase;
UnlockDisplay(dpy);
SyncHandle();
}
/************************************************************************/
/*
** Copy the source context to the destination context using the
** attribute "mask".
*/
void glXCopyContext(Display *dpy, GLXContext source, GLXContext dest,
unsigned long mask)
{
xGLXCopyContextReq *req;
GLXContext gc = __glXGetCurrentContext();
GLXContextTag tag;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return;
}
/*
** If the source is the current context, send its tag so that the context
** can be flushed before the copy.
*/
if (source == gc && dpy == gc->currentDpy) {
tag = gc->currentContextTag;
} else {
tag = 0;
}
/* Send the glXCopyContext request */
LockDisplay(dpy);
GetReq(GLXCopyContext,req);
req->reqType = opcode;
req->glxCode = X_GLXCopyContext;
req->source = source ? source->xid : None;
req->dest = dest ? dest->xid : None;
req->mask = mask;
req->contextTag = tag;
UnlockDisplay(dpy);
SyncHandle();
}
/*
** Return GL_TRUE if the context is direct rendering or not.
*/
static Bool __glXIsDirect(Display *dpy, GLXContextID contextID)
{
xGLXIsDirectReq *req;
xGLXIsDirectReply reply;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return GL_FALSE;
}
/* Send the glXIsDirect request */
LockDisplay(dpy);
GetReq(GLXIsDirect,req);
req->reqType = opcode;
req->glxCode = X_GLXIsDirect;
req->context = contextID;
_XReply(dpy, (xReply*) &reply, 0, False);
UnlockDisplay(dpy);
SyncHandle();
return reply.isDirect;
}
Bool glXIsDirect(Display *dpy, GLXContext gc)
{
if (!gc) {
return GL_FALSE;
}
return __glXIsDirect(dpy, gc->xid);
}
GLXPixmap glXCreateGLXPixmap(Display *dpy, XVisualInfo *vis, Pixmap pixmap)
{
xGLXCreateGLXPixmapReq *req;
GLXPixmap xid;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return None;
}
/* Send the glXCreateGLXPixmap request */
LockDisplay(dpy);
GetReq(GLXCreateGLXPixmap,req);
req->reqType = opcode;
req->glxCode = X_GLXCreateGLXPixmap;
req->screen = vis->screen;
req->visual = vis->visualid;
req->pixmap = pixmap;
req->glxpixmap = xid = XAllocID(dpy);
UnlockDisplay(dpy);
SyncHandle();
return xid;
}
/*
** Destroy the named pixmap
*/
void glXDestroyGLXPixmap(Display *dpy, GLXPixmap glxpixmap)
{
xGLXDestroyGLXPixmapReq *req;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return;
}
/* Send the glXDestroyGLXPixmap request */
LockDisplay(dpy);
GetReq(GLXDestroyGLXPixmap,req);
req->reqType = opcode;
req->glxCode = X_GLXDestroyGLXPixmap;
req->glxpixmap = glxpixmap;
UnlockDisplay(dpy);
SyncHandle();
}
void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
{
xGLXSwapBuffersReq *req;
GLXContext gc = __glXGetCurrentContext();
GLXContextTag tag;
CARD8 opcode;
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return;
}
/*
** The calling thread may or may not have a current context. If it
** does, send the context tag so the server can do a flush.
*/
if ((dpy == gc->currentDpy) && (drawable == gc->currentDrawable)) {
tag = gc->currentContextTag;
} else {
tag = 0;
}
/* Send the glXSwapBuffers request */
LockDisplay(dpy);
GetReq(GLXSwapBuffers,req);
req->reqType = opcode;
req->glxCode = X_GLXSwapBuffers;
req->drawable = drawable;
req->contextTag = tag;
UnlockDisplay(dpy);
SyncHandle();
XFlush(dpy);
}
/*
** Return configuration information for the given display, screen and
** visual combination.
*/
int glXGetConfig(Display *dpy, XVisualInfo *vis, int attribute,
int *value_return)
{
__GLXvisualConfig *pConfig;
__GLXscreenConfigs *psc;
__GLXdisplayPrivate *priv;
GLint i, items;
XVisualInfo* vi;
XVisualInfo template;
/* Initialize the extension, if needed */
priv = __glXInitialize(dpy);
if (!priv) {
/* No extension */
return GLX_NO_EXTENSION;
}
/* Check screen number to see if its valid */
if ((vis->screen < 0) || (vis->screen >= ScreenCount(dpy))) {
return GLX_BAD_SCREEN;
}
/* Check to see if the GL is supported on this screen */
psc = &priv->screenConfigs[vis->screen];
pConfig = psc->configs;
if (!pConfig) {
/* No support for GL on this screen regardless of visual */
if (attribute == GLX_USE_GL) {
*value_return = GL_FALSE;
return Success;
}
return GLX_BAD_VISUAL;
}
/* Lookup attribute after first finding a match on the visual */
for (i = psc->numConfigs; --i >= 0; pConfig++) {
if (pConfig->vid == vis->visualid) {
switch (attribute) {
case GLX_USE_GL:
*value_return = GL_TRUE;
return Success;
case GLX_BUFFER_SIZE:
*value_return = pConfig->bufferSize;
return Success;
case GLX_RGBA:
*value_return = pConfig->rgba;
return Success;
case GLX_RED_SIZE:
*value_return = pConfig->redSize;
return Success;
case GLX_GREEN_SIZE:
*value_return = pConfig->greenSize;
return Success;
case GLX_BLUE_SIZE:
*value_return = pConfig->blueSize;
return Success;
case GLX_ALPHA_SIZE:
*value_return = pConfig->alphaSize;
return Success;
case GLX_DOUBLEBUFFER:
*value_return = pConfig->doubleBuffer;
return Success;
case GLX_STEREO:
*value_return = pConfig->stereo;
return Success;
case GLX_AUX_BUFFERS:
*value_return = pConfig->auxBuffers;
return Success;
case GLX_DEPTH_SIZE:
*value_return = pConfig->depthSize;
return Success;
case GLX_STENCIL_SIZE:
*value_return = pConfig->stencilSize;
return Success;
case GLX_ACCUM_RED_SIZE:
*value_return = pConfig->accumRedSize;
return Success;
case GLX_ACCUM_GREEN_SIZE:
*value_return = pConfig->accumGreenSize;
return Success;
case GLX_ACCUM_BLUE_SIZE:
*value_return = pConfig->accumBlueSize;
return Success;
case GLX_ACCUM_ALPHA_SIZE:
*value_return = pConfig->accumAlphaSize;
return Success;
case GLX_LEVEL:
*value_return = pConfig->level;
return Success;
case GLX_TRANSPARENT_TYPE_EXT:
*value_return = pConfig->transparentPixel;
return Success;
case GLX_TRANSPARENT_RED_VALUE_EXT:
*value_return = pConfig->transparentRed;
return Success;
case GLX_TRANSPARENT_GREEN_VALUE_EXT:
*value_return = pConfig->transparentGreen;
return Success;
case GLX_TRANSPARENT_BLUE_VALUE_EXT:
*value_return = pConfig->transparentBlue;
return Success;
case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
*value_return = pConfig->transparentAlpha;
return Success;
case GLX_TRANSPARENT_INDEX_VALUE_EXT:
*value_return = pConfig->transparentIndex;
return Success;
case GLX_X_VISUAL_TYPE_EXT:
switch(pConfig->class) {
case TrueColor:
*value_return = GLX_TRUE_COLOR_EXT; break;
case DirectColor:
*value_return = GLX_DIRECT_COLOR_EXT; break;
case PseudoColor:
*value_return = GLX_PSEUDO_COLOR_EXT; break;
case StaticColor:
*value_return = GLX_STATIC_COLOR_EXT; break;
case GrayScale:
*value_return = GLX_GRAY_SCALE_EXT; break;
case StaticGray:
*value_return = GLX_STATIC_GRAY_EXT; break;
}
return Success;
case GLX_VISUAL_CAVEAT_EXT:
*value_return = pConfig->visualRating;
return Success;
default:
return GLX_BAD_ATTRIBUTE;
}
}
}
/*
** If we can't find the config for this visual, this visual is not
** supported by the OpenGL implementation on the server.
*/
if (attribute == GLX_USE_GL) {
*value_return = GL_FALSE;
return Success;
}
return GLX_BAD_VISUAL;
}
/************************************************************************/
/*
** Penalize for more auxiliary buffers than requested
*/
static int AuxScore(int minAux, int aux)
{
return minAux - aux;
}
/*
** If color is desired, give increasing score for amount available.
** Scale this score by a multiplier to make color differences more
** important than other differences. Otherwise give decreasing score for
** amount available.
*/
static int ColorScore(int minColor, int color)
{
if (minColor)
return 4 * (color - minColor);
else
return -color;
}
/*
** If accum buffer is desired, give increasing score for amount
** available. Otherwise give decreasing score for amount available.
*/
static int AccumScore(int minAccum, int accum)
{
if (minAccum)
return accum - minAccum;
else
return -accum;
}
/*
** Penalize for indexes larger than requested
*/
static int IndexScore(int minIndex, int ix)
{
return minIndex - ix;
}
/*
** If depth buffer is desired, give increasing score for amount
** available. Scale this score by a multiplier to make depth differences
** more important than other non-color differences. Otherwise give
** decreasing score for amount available.
*/
static int DepthScore(int minDepth, int depth)
{
if (minDepth)
return 2 * (depth - minDepth);
else
return -depth;
}
/*
** Penalize for stencil buffer larger than requested
*/
static int StencilScore(int minStencil, int stencil)
{
return minStencil - stencil;
}
/* "Logical" xor - like && or ||; would be ^^ */
#define __GLX_XOR(a,b) (((a) && !(b)) || (!(a) && (b)))
/* Fetch a configuration value */
#define __GLX_GCONF(attrib) \
if (glXGetConfig(dpy, thisVis, attrib, &val)) { \
XFree((char *)visualList); \
return NULL; \
}
/*
** Return the visual that best matches the template. Return None if no
** visual matches the template.
*/
XVisualInfo *glXChooseVisual(Display *dpy, int screen, int *attribList)
{
XVisualInfo visualTemplate;
XVisualInfo *visualList;
XVisualInfo *thisVis;
int count, i, maxscore = 0, maxi, score, val, thisVisRating, maxRating = 0;
/*
** Declare and initialize template variables
*/
int bufferSize = 0;
int level = 0;
int rgba = 0;
int doublebuffer = 0;
int stereo = 0;
int auxBuffers = 0;
int redSize = 0;
int greenSize = 0;
int blueSize = 0;
int alphaSize = 0;
int depthSize = 0;
int stencilSize = 0;
int accumRedSize = 0;
int accumGreenSize = 0;
int accumBlueSize = 0;
int accumAlphaSize = 0;
/* for visual_info extension */
int visualType = 0;
int visualTypeValue = 0;
int transparentPixel = 0;
int transparentPixelValue = GLX_NONE_EXT;
int transparentIndex = 0;
int transparentIndexValue = 0;
int transparentRed = 0;
int transparentRedValue = 0;
int transparentGreen = 0;
int transparentGreenValue = 0;
int transparentBlue = 0;
int transparentBlueValue = 0;
int transparentAlpha = 0;
int transparentAlphaValue = 0;
/* for visual_rating extension */
int visualRating = 0;
int visualRatingValue = GLX_NONE_EXT;
/*
** Get a list of all visuals, return if list is empty
*/
visualTemplate.screen = screen;
visualList = XGetVisualInfo(dpy,VisualScreenMask,&visualTemplate,&count);
if (visualList == NULL)
return None;
/*
** Build a template from the defaults and the attribute list
** Free visual list and return if an unexpected token is encountered
*/
while (*attribList != None) {
switch (*attribList++) {
case GLX_USE_GL:
break;
case GLX_BUFFER_SIZE:
bufferSize = *attribList++;
break;
case GLX_LEVEL:
level = *attribList++;
break;
case GLX_RGBA:
rgba = 1;
break;
case GLX_DOUBLEBUFFER:
doublebuffer = 1;
break;
case GLX_STEREO:
stereo = 1;
break;
case GLX_AUX_BUFFERS:
auxBuffers = *attribList++;
break;
case GLX_RED_SIZE:
redSize = *attribList++;
break;
case GLX_GREEN_SIZE:
greenSize = *attribList++;
break;
case GLX_BLUE_SIZE:
blueSize = *attribList++;
break;
case GLX_ALPHA_SIZE:
alphaSize = *attribList++;
break;
case GLX_DEPTH_SIZE:
depthSize = *attribList++;
break;
case GLX_STENCIL_SIZE:
stencilSize = *attribList++;
break;
case GLX_ACCUM_RED_SIZE:
accumRedSize = *attribList++;
break;
case GLX_ACCUM_GREEN_SIZE:
accumGreenSize = *attribList++;
break;
case GLX_ACCUM_BLUE_SIZE:
accumBlueSize = *attribList++;
break;
case GLX_ACCUM_ALPHA_SIZE:
accumAlphaSize = *attribList++;
break;
case GLX_X_VISUAL_TYPE_EXT:
visualType = 1;
visualTypeValue = *attribList++;
break;
case GLX_TRANSPARENT_TYPE_EXT:
transparentPixel = 1;
transparentPixelValue = *attribList++;
break;
case GLX_TRANSPARENT_INDEX_VALUE_EXT:
transparentIndex= 1;
transparentIndexValue = *attribList++;
break;
case GLX_TRANSPARENT_RED_VALUE_EXT:
transparentRed = 1;
transparentRedValue = *attribList++;
break;
case GLX_TRANSPARENT_GREEN_VALUE_EXT:
transparentGreen = 1;
transparentGreenValue = *attribList++;
break;
case GLX_TRANSPARENT_BLUE_VALUE_EXT:
transparentBlue = 1;
transparentBlueValue = *attribList++;
break;
case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
transparentAlpha = 1;
transparentAlphaValue = *attribList++;
break;
case GLX_VISUAL_CAVEAT_EXT:
visualRating = 1;
visualRatingValue = *attribList++;
break;
default:
XFree((char *)visualList);
return None;
}
}
/*
** Eliminate visuals that don't meet minimum requirements
** Compute a score for those that do
** Remember which visual, if any, got the highest score
*/
maxi = -1;
for (i = 0; i < count; i++) {
score = 0;
thisVis = &visualList[i]; /* NOTE: used by __GLX_GCONF */
if (thisVis->class == TrueColor || thisVis->class == PseudoColor) {
/* Bump score by one for TrueColor and PseudoColor visuals. */
score++;
}
__GLX_GCONF(GLX_USE_GL);
if (! val)
continue;
__GLX_GCONF(GLX_LEVEL);
if (level != val)
continue;
__GLX_GCONF(GLX_RGBA);
if (__GLX_XOR(rgba, val))
continue;
__GLX_GCONF(GLX_DOUBLEBUFFER);
if (__GLX_XOR(doublebuffer, val))
continue;
__GLX_GCONF(GLX_STEREO);
if (__GLX_XOR(stereo, val))
continue;
__GLX_GCONF(GLX_AUX_BUFFERS);
if (auxBuffers > val)
continue;
else
score += AuxScore(auxBuffers, val);
if (transparentPixel) {
if (transparentPixelValue != val)
continue;
if (transparentPixelValue == GLX_TRANSPARENT_TYPE_EXT) {
if (rgba) {
__GLX_GCONF(GLX_TRANSPARENT_RGB_EXT);
if (transparentRed) {
__GLX_GCONF(GLX_TRANSPARENT_RED_VALUE_EXT);
if (transparentRedValue != val)
continue;
}
if (transparentGreen) {
__GLX_GCONF(GLX_TRANSPARENT_GREEN_VALUE_EXT);
if (transparentGreenValue != val)
continue;
}
if (transparentBlue) {
__GLX_GCONF(GLX_TRANSPARENT_BLUE_VALUE_EXT);
if (transparentBlueValue != val)
continue;
}
/* Transparent Alpha ignored for now */
} else {
__GLX_GCONF(GLX_TRANSPARENT_INDEX_EXT);
if (transparentIndex) {
__GLX_GCONF(GLX_TRANSPARENT_INDEX_VALUE_EXT);
if (transparentIndexValue != val)
continue;
}
}
}
}
if (visualType) {
__GLX_GCONF(GLX_X_VISUAL_TYPE_EXT);
if (visualTypeValue != val)
continue;
} else if (rgba) {
/* If the extension isn't specified then insure that rgba
** and ci return the usual visual types.
*/
if (!(thisVis->class == TrueColor || thisVis->class == DirectColor))
continue;
} else {
if (!(thisVis->class == PseudoColor
|| thisVis->class == StaticColor))
continue;
}
__GLX_GCONF(GLX_VISUAL_CAVEAT_EXT);
/**
** Unrated visuals are given rating GLX_NONE.
*/
thisVisRating = val ? val : GLX_NONE_EXT;
if (visualRating && (visualRatingValue != val))
continue;
if (rgba) {
__GLX_GCONF(GLX_RED_SIZE);
if (redSize > val)
continue;
else
score += ColorScore(redSize,val);
__GLX_GCONF(GLX_GREEN_SIZE);
if (greenSize > val)
continue;
else
score += ColorScore(greenSize, val);
__GLX_GCONF(GLX_BLUE_SIZE);
if (blueSize > val)
continue;
else
score += ColorScore(blueSize, val);
__GLX_GCONF(GLX_ALPHA_SIZE);
if (alphaSize > val)
continue;
else
score += ColorScore(alphaSize, val);
__GLX_GCONF(GLX_ACCUM_RED_SIZE);
if (accumRedSize > val)
continue;
else
score += AccumScore(accumRedSize, val);
__GLX_GCONF(GLX_ACCUM_GREEN_SIZE);
if (accumGreenSize > val)
continue;
else
score += AccumScore(accumGreenSize, val);
__GLX_GCONF(GLX_ACCUM_BLUE_SIZE);
if (accumBlueSize > val)
continue;
else
score += AccumScore(accumBlueSize, val);
__GLX_GCONF(GLX_ACCUM_ALPHA_SIZE);
if (accumAlphaSize > val)
continue;
else
score += AccumScore(accumAlphaSize, val);
} else {
__GLX_GCONF(GLX_BUFFER_SIZE);
if (bufferSize > val)
continue;
else
score += IndexScore(bufferSize, val);
}
__GLX_GCONF(GLX_DEPTH_SIZE);
if (depthSize > val)
continue;
else
score += DepthScore(depthSize, val);
__GLX_GCONF(GLX_STENCIL_SIZE);
if (stencilSize > val)
continue;
else
score += StencilScore(stencilSize, val);
/*
** The visual_rating extension indicates that a NONE visual
** is always returned in preference to a SLOW one.
** Note that enum values are in increasing order (NONE < SLOW).
*/
if (maxi < 0 || maxRating > thisVisRating) {
maxi = i;
maxscore = score;
maxRating = thisVisRating;
} else {
if (score > maxscore) {
maxi = i;
maxscore = score;
}
}
}
/*
** If no visual is acceptable, return None
** Otherwise, create an XVisualInfo list with just the selected X visual
** and return this after freeing the original list
*/
if (maxi < 0) {
XFree((char *)visualList);
return None;
} else {
visualTemplate.visualid = visualList[maxi].visualid;
XFree((char *)visualList);
visualList = XGetVisualInfo(dpy,VisualScreenMask|VisualIDMask,&visualTemplate,&count);
return visualList;
}
}
/*
** Query the Server GLX string and cache it in the display private.
** This routine will allocate the necessay space for the string.
*/
static char *QueryServerString( Display *dpy, int opcode,
int screen, int name )
{
xGLXQueryServerStringReq *req;
xGLXQueryServerStringReply reply;
int length, numbytes, slop;
char *buf;
/* Send the glXQueryServerString request */
LockDisplay(dpy);
GetReq(GLXQueryServerString,req);
req->reqType = opcode;
req->glxCode = X_GLXQueryServerString;
req->screen = screen;
req->name = name;
_XReply(dpy, (xReply*) &reply, 0, False);
length = reply.length;
numbytes = reply.n;
slop = numbytes * __GLX_SIZE_INT8 & 3;
buf = (char *)Xmalloc(numbytes);
if (!buf) {
/* Throw data on the floor */
_XEatData(dpy, length);
} else {
_XRead(dpy, (char *)buf, numbytes);
if (slop) _XEatData(dpy,4-slop);
}
UnlockDisplay(dpy);
SyncHandle();
return buf;
}
#define SEPARATOR " "
static char *combine_strings( const char *cext_string, const char *sext_string )
{
int clen, slen;
char *combo_string, *token, *s1;
const char *s2, *end;
/*
** String can't be longer than min(cstring, sstring)
** pull tokens out of shortest string
** include space in combo_string for final separator and null terminator
*/
if ( (clen = strlen( cext_string)) > (slen = strlen( sext_string)) ) {
combo_string = (char *) Xmalloc( slen + 2 );
s1 = (char *) malloc( slen + 2 ); strcpy( s1, sext_string );
s2 = cext_string;
} else {
combo_string = (char *) malloc( clen + 2 );
s1 = (char *) Xmalloc( clen + 2 ); strcpy( s1, cext_string);
s2 = sext_string;
}
if (!combo_string || !s1) {
if (combo_string) Xfree(combo_string);
if (s1) Xfree(s1);
return NULL;
}
combo_string[0] = '\0';
/* Get first extension token */
token = strtok( s1, SEPARATOR);
while ( token != NULL ) {
/*
** if token in second string then save it
** beware of extension names which are prefixes of other extension names
*/
const char *p = s2;
end = p + strlen(p);
while (p < end) {
int n = strcspn(p, SEPARATOR);
if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) {
combo_string = strcat( combo_string, token);
combo_string = strcat( combo_string, SEPARATOR);
}
p += (n + 1);
}
/* Get next extension token */
token = strtok( NULL, SEPARATOR);
}
Xfree(s1);
return combo_string;
}
const char *glXQueryExtensionsString( Display *dpy, int screen )
{
__GLXvisualConfig *pConfig;
__GLXscreenConfigs *psc;
__GLXdisplayPrivate *priv;
/* Initialize the extension, if needed . This has the added value
of initializing/allocating the display private */
priv = __glXInitialize(dpy);
if (!priv) {
return NULL;
}
/* Check screen number to see if its valid */
if ((screen < 0) || (screen >= ScreenCount(dpy))) {
return NULL;
}
/* Check to see if the GL is supported on this screen */
psc = &priv->screenConfigs[screen];
pConfig = psc->configs;
if (!pConfig) {
/* No support for GL on this screen regardless of visual */
return NULL;
}
if (!psc->effectiveGLXexts) {
if (!psc->serverGLXexts) {
psc->serverGLXexts = QueryServerString(dpy, priv->majorOpcode,
screen, GLX_EXTENSIONS);
}
psc->effectiveGLXexts = combine_strings(__glXGLXClientExtensions,
psc->serverGLXexts);
}
return psc->effectiveGLXexts;
}
const char *glXGetClientString( Display *dpy, int name )
{
switch(name) {
case GLX_VENDOR:
return (__glXGLXClientVendorName);
case GLX_VERSION:
return (__glXGLXClientVersion);
case GLX_EXTENSIONS:
return (__glXGLXClientExtensions);
default:
return NULL;
}
}
const char *glXQueryServerString( Display *dpy, int screen, int name )
{
__GLXvisualConfig *pConfig;
__GLXscreenConfigs *psc;
__GLXdisplayPrivate *priv;
/* Initialize the extension, if needed . This has the added value
of initializing/allocating the display private */
priv = __glXInitialize(dpy);
if (!priv) {
/* No extension */
return NULL;
}
/* Check screen number to see if its valid */
if ((screen < 0) || (screen >= ScreenCount(dpy))) {
return NULL;
}
/* Check to see if the GL is supported on this screen */
psc = &priv->screenConfigs[screen];
pConfig = psc->configs;
if (!pConfig) {
/* No support for GL on this screen regardless of visual */
return NULL;
}
switch(name) {
case GLX_VENDOR:
if (!priv->serverGLXvendor) {
priv->serverGLXvendor =
QueryServerString(dpy, priv->majorOpcode,
screen, GLX_VENDOR);
}
return(priv->serverGLXvendor);
case GLX_VERSION:
if (!priv->serverGLXversion) {
priv->serverGLXversion =
QueryServerString(dpy, priv->majorOpcode,
screen, GLX_VERSION);
}
return(priv->serverGLXversion);
case GLX_EXTENSIONS:
if (!psc->serverGLXexts) {
psc->serverGLXexts =
QueryServerString(dpy, priv->majorOpcode,
screen, GLX_EXTENSIONS);
}
return(psc->serverGLXexts);
default:
return NULL;
}
}
void __glXClientInfo ( Display *dpy, int opcode )
{
xGLXClientInfoReq *req;
int size;
/* Send the glXClientInfo request */
LockDisplay(dpy);
GetReq(GLXClientInfo,req);
req->reqType = opcode;
req->glxCode = X_GLXClientInfo;
req->major = GLX_MAJOR_VERSION;
req->minor = GLX_MINOR_VERSION;
size = strlen(__glXGLClientExtensions) + 1;
req->length += (size + 3) >> 2;
req->numbytes = size;
Data(dpy, __glXGLClientExtensions, size);
UnlockDisplay(dpy);
SyncHandle();
}
/************************************************************************/
/*
** EXT_import_context entry points
*/
/************************************************************************/
Display *glXGetCurrentDisplay(void)
{
GLXContext gc = __glXGetCurrentContext();
if (NULL == gc) return NULL;
return gc->currentDpy;
}
static int __glXQueryContextInfo(Display *dpy, GLXContext ctx)
{
xGLXVendorPrivateReq *vpreq;
xGLXQueryContextInfoEXTReq *req;
xGLXQueryContextInfoEXTReply reply;
CARD8 opcode;
GLXContext gc = __glXGetCurrentContext();
GLuint numValues;
if (ctx == NULL) {
return GLX_BAD_CONTEXT;
}
opcode = __glXSetupForCommand(dpy);
if (!opcode) {
return 0;
}
/* Send the glXQueryContextInfoEXT request */
LockDisplay(dpy);
GetReqExtra(GLXVendorPrivate,
sz_xGLXQueryContextInfoEXTReq-sz_xGLXVendorPrivateReq,vpreq);
req = (xGLXQueryContextInfoEXTReq *)vpreq;
req->reqType = opcode;
req->glxCode = X_GLXVendorPrivateWithReply;
req->vendorCode = X_GLXvop_QueryContextInfoEXT;
req->context = (unsigned int)(ctx->xid);
_XReply(dpy, (xReply*) &reply, 0, False);
UnlockDisplay(dpy);
numValues = reply.n;
if (numValues == 0) return Success;
if (numValues > __GLX_MAX_CONTEXT_PROPS) return 0;
{
int *propList, *pProp;
int nPropListBytes;
int i;
nPropListBytes = numValues << 3;
propList = (int *) Xmalloc(nPropListBytes);
if (NULL == propList) {
return 0;
}
_XRead(dpy, (char *)propList, nPropListBytes);
pProp = propList;
for (i=0; i < numValues; i++) {
switch (*pProp++) {
case GLX_SHARE_CONTEXT_EXT:
ctx->share_xid = *pProp++;
break;
case GLX_VISUAL_ID_EXT:
ctx->vid = *pProp++;
break;
case GLX_SCREEN_EXT:
ctx->screen = *pProp++;
break;
default:
pProp++;
continue;
}
}
Xfree((char *)propList);
}
SyncHandle();
return Success;
}
int glXQueryContextInfoEXT(Display *dpy, GLXContext ctx,
int attribute, int *value)
{
int retVal;
/* get the information from the server if we don't have it already */
if (!ctx->isDirect && (ctx->vid == None)) {
retVal = __glXQueryContextInfo(dpy, ctx);
if (Success != retVal) return retVal;
}
switch (attribute) {
case GLX_SHARE_CONTEXT_EXT:
*value = (int)(ctx->share_xid);
break;
case GLX_VISUAL_ID_EXT:
*value = (int)(ctx->vid);
break;
case GLX_SCREEN_EXT:
*value = (int)(ctx->screen);
break;
default:
return GLX_BAD_ATTRIBUTE;
}
return Success;
}
GLXContextID glXGetContextIDEXT(const GLXContext ctx)
{
return ctx->xid;
}
GLXContext glXImportContextEXT(Display *dpy, GLXContextID contextID)
{
VisualID vid;
int screen;
GLXContextID shareListID;
GLXContext ctx;
if (contextID == None) {
return NULL;
}
if (__glXIsDirect(dpy, contextID)) {
return NULL;
}
ctx = CreateContext(dpy, NULL, NULL, GL_FALSE, contextID);
if (NULL != ctx) {
if (Success != __glXQueryContextInfo(dpy, ctx)) {
return NULL;
}
}
return ctx;
}
void glXFreeContextEXT(Display *dpy, GLXContext ctx)
{
DestroyContext(dpy, ctx);
}
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