/*
* Mesa 3-D graphics library
* Version: 7.6
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, 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 and this permission notice 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
* BRIAN PAUL 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.
*/
/**
* "Fake" GLX API implemented in terms of the XMesa*() functions.
*/
#define GLX_GLXEXT_PROTOTYPES
#include "GL/glx.h"
#include "xm_api.h"
/* This indicates the client-side GLX API and GLX encoder version. */
#define CLIENT_MAJOR_VERSION 1
#define CLIENT_MINOR_VERSION 4 /* but don't have 1.3's pbuffers, etc yet */
/* This indicates the server-side GLX decoder version.
* GLX 1.4 indicates OpenGL 1.3 support
*/
#define SERVER_MAJOR_VERSION 1
#define SERVER_MINOR_VERSION 4
/* Who implemented this GLX? */
#define VENDOR "Brian Paul"
#define EXTENSIONS \
"GLX_MESA_copy_sub_buffer " \
"GLX_MESA_pixmap_colormap " \
"GLX_MESA_release_buffers " \
"GLX_ARB_create_context " \
"GLX_ARB_create_context_profile " \
"GLX_ARB_get_proc_address " \
"GLX_EXT_texture_from_pixmap " \
"GLX_EXT_visual_info " \
"GLX_EXT_visual_rating " \
/*"GLX_SGI_video_sync "*/ \
"GLX_SGIX_fbconfig " \
"GLX_SGIX_pbuffer "
#define DEFAULT_DIRECT GL_TRUE
/** XXX this could be based on gallium's max texture size */
#define PBUFFER_MAX_SIZE 16384
/**
* The GLXContext typedef is defined as a pointer to this structure.
*/
struct __GLXcontextRec
{
Display *currentDpy;
GLboolean isDirect;
GLXDrawable currentDrawable;
GLXDrawable currentReadable;
XID xid;
XMesaContext xmesaContext;
};
static pipe_tsd ContextTSD;
/** Set current context for calling thread */
static void
SetCurrentContext(GLXContext c)
{
pipe_tsd_set(&ContextTSD, c);
}
/** Get current context for calling thread */
static GLXContext
GetCurrentContext(void)
{
return pipe_tsd_get(&ContextTSD);
}
/**********************************************************************/
/*** GLX Visual Code ***/
/**********************************************************************/
#define DONT_CARE -1
static XMesaVisual *VisualTable = NULL;
static int NumVisuals = 0;
/* Macro to handle c_class vs class field name in XVisualInfo struct */
#if defined(__cplusplus) || defined(c_plusplus)
#define CLASS c_class
#else
#define CLASS class
#endif
/*
* Test if the given XVisualInfo is usable for Mesa rendering.
*/
static GLboolean
is_usable_visual( XVisualInfo *vinfo )
{
switch (vinfo->CLASS) {
case StaticGray:
case GrayScale:
/* Any StaticGray/GrayScale visual works in RGB or CI mode */
return GL_TRUE;
case StaticColor:
case PseudoColor:
/* Any StaticColor/PseudoColor visual of at least 4 bits */
if (vinfo->depth>=4) {
return GL_TRUE;
}
else {
return GL_FALSE;
}
case TrueColor:
case DirectColor:
/* Any depth of TrueColor or DirectColor works in RGB mode */
return GL_TRUE;
default:
/* This should never happen */
return GL_FALSE;
}
}
/*
* Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
* configuration in our list of GLX visuals.
*/
static XMesaVisual
save_glx_visual( Display *dpy, XVisualInfo *vinfo,
GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
GLboolean stereoFlag,
GLint depth_size, GLint stencil_size,
GLint accumRedSize, GLint accumGreenSize,
GLint accumBlueSize, GLint accumAlphaSize,
GLint level, GLint numAuxBuffers )
{
GLboolean ximageFlag = GL_TRUE;
XMesaVisual xmvis;
GLint i;
GLboolean comparePointers;
if (dbFlag) {
/* Check if the MESA_BACK_BUFFER env var is set */
char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
if (backbuffer) {
if (backbuffer[0]=='p' || backbuffer[0]=='P') {
ximageFlag = GL_FALSE;
}
else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
ximageFlag = GL_TRUE;
}
else {
_mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
}
}
}
if (stereoFlag) {
/* stereo not supported */
return NULL;
}
if (stencil_size > 0 && depth_size > 0)
depth_size = 24;
/* Comparing IDs uses less memory but sometimes fails. */
/* XXX revisit this after 3.0 is finished. */
if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
comparePointers = GL_TRUE;
else
comparePointers = GL_FALSE;
/* Force the visual to have an alpha channel */
if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
alphaFlag = GL_TRUE;
/* First check if a matching visual is already in the list */
for (i=0; i<NumVisuals; i++) {
XMesaVisual v = VisualTable[i];
if (v->display == dpy
&& v->mesa_visual.level == level
&& v->mesa_visual.numAuxBuffers == numAuxBuffers
&& v->ximage_flag == ximageFlag
&& v->mesa_visual.rgbMode == rgbFlag
&& v->mesa_visual.doubleBufferMode == dbFlag
&& v->mesa_visual.stereoMode == stereoFlag
&& (v->mesa_visual.alphaBits > 0) == alphaFlag
&& (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
&& (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
&& (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
&& (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
&& (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
&& (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
/* now either compare XVisualInfo pointers or visual IDs */
if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
|| (comparePointers && v->vishandle == vinfo)) {
return v;
}
}
}
/* Create a new visual and add it to the list. */
xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
stereoFlag, ximageFlag,
depth_size, stencil_size,
accumRedSize, accumBlueSize,
accumBlueSize, accumAlphaSize, 0, level,
GLX_NONE_EXT );
if (xmvis) {
/* Save a copy of the pointer now so we can find this visual again
* if we need to search for it in find_glx_visual().
*/
xmvis->vishandle = vinfo;
/* Allocate more space for additional visual */
VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
sizeof(XMesaVisual) * NumVisuals,
sizeof(XMesaVisual) * (NumVisuals + 1));
/* add xmvis to the list */
VisualTable[NumVisuals] = xmvis;
NumVisuals++;
/* XXX minor hack, because XMesaCreateVisual doesn't support an
* aux buffers parameter.
*/
xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
}
return xmvis;
}
/**
* Return the default number of bits for the Z buffer.
* If defined, use the MESA_GLX_DEPTH_BITS env var value.
* Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
* XXX probably do the same thing for stencil, accum, etc.
*/
static GLint
default_depth_bits(void)
{
int zBits;
const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
if (zEnv)
zBits = atoi(zEnv);
else
zBits = 24;
return zBits;
}
static GLint
default_alpha_bits(void)
{
int aBits;
const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
if (aEnv)
aBits = atoi(aEnv);
else
aBits = 0;
return aBits;
}
static GLint
default_accum_bits(void)
{
return 16;
}
/*
* Create a GLX visual from a regular XVisualInfo.
* This is called when Fake GLX is given an XVisualInfo which wasn't
* returned by glXChooseVisual. Since this is the first time we're
* considering this visual we'll take a guess at reasonable values
* for depth buffer size, stencil size, accum size, etc.
* This is the best we can do with a client-side emulation of GLX.
*/
static XMesaVisual
create_glx_visual( Display *dpy, XVisualInfo *visinfo )
{
GLint zBits = default_depth_bits();
GLint accBits = default_accum_bits();
GLboolean alphaFlag = default_alpha_bits() > 0;
if (is_usable_visual( visinfo )) {
/* Configure this visual as RGB, double-buffered, depth-buffered. */
/* This is surely wrong for some people's needs but what else */
/* can be done? They should use glXChooseVisual(). */
return save_glx_visual( dpy, visinfo,
GL_TRUE, /* rgb */
alphaFlag, /* alpha */
GL_TRUE, /* double */
GL_FALSE, /* stereo */
zBits,
8, /* stencil bits */
accBits, /* r */
accBits, /* g */
accBits, /* b */
accBits, /* a */
0, /* level */
0 /* numAux */
);
}
else {
_mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
return NULL;
}
}
/*
* Find the GLX visual associated with an XVisualInfo.
*/
static XMesaVisual
find_glx_visual( Display *dpy, XVisualInfo *vinfo )
{
int i;
/* try to match visual id */
for (i=0;i<NumVisuals;i++) {
if (VisualTable[i]->display==dpy
&& VisualTable[i]->visinfo->visualid == vinfo->visualid) {
return VisualTable[i];
}
}
/* if that fails, try to match pointers */
for (i=0;i<NumVisuals;i++) {
if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
return VisualTable[i];
}
}
return NULL;
}
/**
* Try to get an X visual which matches the given arguments.
*/
static XVisualInfo *
get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
{
XVisualInfo temp, *vis;
long mask;
int n;
unsigned int default_depth;
int default_class;
mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
temp.screen = scr;
temp.depth = depth;
temp.CLASS = xclass;
default_depth = DefaultDepth(dpy,scr);
default_class = DefaultVisual(dpy,scr)->CLASS;
if (depth==default_depth && xclass==default_class) {
/* try to get root window's visual */
temp.visualid = DefaultVisual(dpy,scr)->visualid;
mask |= VisualIDMask;
}
vis = XGetVisualInfo( dpy, mask, &temp, &n );
/* In case bits/pixel > 24, make sure color channels are still <=8 bits.
* An SGI Infinite Reality system, for example, can have 30bpp pixels:
* 10 bits per color channel. Mesa's limited to a max of 8 bits/channel.
*/
if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
if (_mesa_bitcount((GLuint) vis->red_mask ) <= 8 &&
_mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
_mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
return vis;
}
else {
XFree((void *) vis);
return NULL;
}
}
return vis;
}
/*
* Retrieve the value of the given environment variable and find
* the X visual which matches it.
* Input: dpy - the display
* screen - the screen number
* varname - the name of the environment variable
* Return: an XVisualInfo pointer to NULL if error.
*/
static XVisualInfo *
get_env_visual(Display *dpy, int scr, const char *varname)
{
char value[100], type[100];
int depth, xclass = -1;
XVisualInfo *vis;
if (!_mesa_getenv( varname )) {
return NULL;
}
strncpy( value, _mesa_getenv(varname), 100 );
value[99] = 0;
sscanf( value, "%s %d", type, &depth );
if (strcmp(type,"TrueColor")==0) xclass = TrueColor;
else if (strcmp(type,"DirectColor")==0) xclass = DirectColor;
else if (strcmp(type,"PseudoColor")==0) xclass = PseudoColor;
else if (strcmp(type,"StaticColor")==0) xclass = StaticColor;
else if (strcmp(type,"GrayScale")==0) xclass = GrayScale;
else if (strcmp(type,"StaticGray")==0) xclass = StaticGray;
if (xclass>-1 && depth>0) {
vis = get_visual( dpy, scr, depth, xclass );
if (vis) {
return vis;
}
}
_mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
type, depth);
return NULL;
}
/*
* Select an X visual which satisfies the RGBA flag and minimum depth.
* Input: dpy,
* screen - X display and screen number
* min_depth - minimum visual depth
* preferred_class - preferred GLX visual class or DONT_CARE
* Return: pointer to an XVisualInfo or NULL.
*/
static XVisualInfo *
choose_x_visual( Display *dpy, int screen, int min_depth,
int preferred_class )
{
XVisualInfo *vis;
int xclass, visclass = 0;
int depth;
/* First see if the MESA_RGB_VISUAL env var is defined */
vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
if (vis) {
return vis;
}
/* Otherwise, search for a suitable visual */
if (preferred_class==DONT_CARE) {
for (xclass=0;xclass<6;xclass++) {
switch (xclass) {
case 0: visclass = TrueColor; break;
case 1: visclass = DirectColor; break;
case 2: visclass = PseudoColor; break;
case 3: visclass = StaticColor; break;
case 4: visclass = GrayScale; break;
case 5: visclass = StaticGray; break;
}
if (min_depth==0) {
/* start with shallowest */
for (depth=0;depth<=32;depth++) {
if (visclass==TrueColor && depth==8) {
/* Special case: try to get 8-bit PseudoColor before */
/* 8-bit TrueColor */
vis = get_visual( dpy, screen, 8, PseudoColor );
if (vis) {
return vis;
}
}
vis = get_visual( dpy, screen, depth, visclass );
if (vis) {
return vis;
}
}
}
else {
/* start with deepest */
for (depth=32;depth>=min_depth;depth--) {
if (visclass==TrueColor && depth==8) {
/* Special case: try to get 8-bit PseudoColor before */
/* 8-bit TrueColor */
vis = get_visual( dpy, screen, 8, PseudoColor );
if (vis) {
return vis;
}
}
vis = get_visual( dpy, screen, depth, visclass );
if (vis) {
return vis;
}
}
}
}
}
else {
/* search for a specific visual class */
switch (preferred_class) {
case GLX_TRUE_COLOR_EXT: visclass = TrueColor; break;
case GLX_DIRECT_COLOR_EXT: visclass = DirectColor; break;
case GLX_PSEUDO_COLOR_EXT: visclass = PseudoColor; break;
case GLX_STATIC_COLOR_EXT: visclass = StaticColor; break;
case GLX_GRAY_SCALE_EXT: visclass = GrayScale; break;
case GLX_STATIC_GRAY_EXT: visclass = StaticGray; break;
default: return NULL;
}
if (min_depth==0) {
/* start with shallowest */
for (depth=0;depth<=32;depth++) {
vis = get_visual( dpy, screen, depth, visclass );
if (vis) {
return vis;
}
}
}
else {
/* start with deepest */
for (depth=32;depth>=min_depth;depth--) {
vis = get_visual( dpy, screen, depth, visclass );
if (vis) {
return vis;
}
}
}
}
/* didn't find a visual */
return NULL;
}
/**********************************************************************/
/*** Display-related functions ***/
/**********************************************************************/
/**
* Free all XMesaVisuals which are associated with the given display.
*/
static void
destroy_visuals_on_display(Display *dpy)
{
int i;
for (i = 0; i < NumVisuals; i++) {
if (VisualTable[i]->display == dpy) {
/* remove this visual */
int j;
free(VisualTable[i]);
for (j = i; j < NumVisuals - 1; j++)
VisualTable[j] = VisualTable[j + 1];
NumVisuals--;
}
}
}
/**
* Called from XCloseDisplay() to let us free our display-related data.
*/
static int
close_display_callback(Display *dpy, XExtCodes *codes)
{
xmesa_destroy_buffers_on_display(dpy);
destroy_visuals_on_display(dpy);
return 0;
}
/**
* Look for the named extension on given display and return a pointer
* to the _XExtension data, or NULL if extension not found.
*/
static _XExtension *
lookup_extension(Display *dpy, const char *extName)
{
_XExtension *ext;
for (ext = dpy->ext_procs; ext; ext = ext->next) {
if (ext->name && strcmp(ext->name, extName) == 0) {
return ext;
}
}
return NULL;
}
/**
* Whenever we're given a new Display pointer, call this function to
* register our close_display_callback function.
*/
static void
register_with_display(Display *dpy)
{
const char *extName = "MesaGLX";
_XExtension *ext;
ext = lookup_extension(dpy, extName);
if (!ext) {
XExtCodes *c = XAddExtension(dpy);
ext = dpy->ext_procs; /* new extension is at head of list */
assert(c->extension == ext->codes.extension);
(void) c;
ext->name = _mesa_strdup(extName);
ext->close_display = close_display_callback;
}
}
/**********************************************************************/
/*** Begin Fake GLX API Functions ***/
/**********************************************************************/
/**
* Helper used by glXChooseVisual and glXChooseFBConfig.
* The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
* the later.
* In either case, the attribute list is terminated with the value 'None'.
*/
static XMesaVisual
choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
{
const GLboolean rgbModeDefault = fbConfig;
const int *parselist;
XVisualInfo *vis;
int min_red=0, min_green=0, min_blue=0;
GLboolean rgb_flag = rgbModeDefault;
GLboolean alpha_flag = GL_FALSE;
GLboolean double_flag = GL_FALSE;
GLboolean stereo_flag = GL_FALSE;
GLint depth_size = 0;
GLint stencil_size = 0;
GLint accumRedSize = 0;
GLint accumGreenSize = 0;
GLint accumBlueSize = 0;
GLint accumAlphaSize = 0;
int level = 0;
int visual_type = DONT_CARE;
GLint caveat = DONT_CARE;
XMesaVisual xmvis = NULL;
int desiredVisualID = -1;
int numAux = 0;
xmesa_init( dpy );
parselist = list;
while (*parselist) {
if (fbConfig &&
parselist[1] == GLX_DONT_CARE &&
parselist[0] != GLX_LEVEL) {
/* For glXChooseFBConfig(), skip attributes whose value is
* GLX_DONT_CARE, unless it's GLX_LEVEL (which can legitimately be
* a negative value).
*
* From page 17 (23 of the pdf) of the GLX 1.4 spec:
* GLX DONT CARE may be specified for all attributes except GLX LEVEL.
*/
parselist += 2;
continue;
}
switch (*parselist) {
case GLX_USE_GL:
if (fbConfig) {
/* invalid token */
return NULL;
}
else {
/* skip */
parselist++;
}
break;
case GLX_BUFFER_SIZE:
parselist++;
parselist++;
break;
case GLX_LEVEL:
parselist++;
level = *parselist++;
break;
case GLX_RGBA:
if (fbConfig) {
/* invalid token */
return NULL;
}
else {
rgb_flag = GL_TRUE;
parselist++;
}
break;
case GLX_DOUBLEBUFFER:
parselist++;
if (fbConfig) {
double_flag = *parselist++;
}
else {
double_flag = GL_TRUE;
}
break;
case GLX_STEREO:
parselist++;
if (fbConfig) {
stereo_flag = *parselist++;
}
else {
stereo_flag = GL_TRUE;
}
break;
case GLX_AUX_BUFFERS:
parselist++;
numAux = *parselist++;
if (numAux > MAX_AUX_BUFFERS)
return NULL;
break;
case GLX_RED_SIZE:
parselist++;
min_red = *parselist++;
break;
case GLX_GREEN_SIZE:
parselist++;
min_green = *parselist++;
break;
case GLX_BLUE_SIZE:
parselist++;
min_blue = *parselist++;
break;
case GLX_ALPHA_SIZE:
parselist++;
{
GLint size = *parselist++;
alpha_flag = size ? GL_TRUE : GL_FALSE;
}
break;
case GLX_DEPTH_SIZE:
parselist++;
depth_size = *parselist++;
break;
case GLX_STENCIL_SIZE:
parselist++;
stencil_size = *parselist++;
break;
case GLX_ACCUM_RED_SIZE:
parselist++;
{
GLint size = *parselist++;
accumRedSize = MAX2( accumRedSize, size );
}
break;
case GLX_ACCUM_GREEN_SIZE:
parselist++;
{
GLint size = *parselist++;
accumGreenSize = MAX2( accumGreenSize, size );
}
break;
case GLX_ACCUM_BLUE_SIZE:
parselist++;
{
GLint size = *parselist++;
accumBlueSize = MAX2( accumBlueSize, size );
}
break;
case GLX_ACCUM_ALPHA_SIZE:
parselist++;
{
GLint size = *parselist++;
accumAlphaSize = MAX2( accumAlphaSize, size );
}
break;
/*
* GLX_EXT_visual_info extension
*/
case GLX_X_VISUAL_TYPE_EXT:
parselist++;
visual_type = *parselist++;
break;
case GLX_TRANSPARENT_TYPE_EXT:
parselist++;
parselist++;
break;
case GLX_TRANSPARENT_INDEX_VALUE_EXT:
parselist++;
parselist++;
break;
case GLX_TRANSPARENT_RED_VALUE_EXT:
case GLX_TRANSPARENT_GREEN_VALUE_EXT:
case GLX_TRANSPARENT_BLUE_VALUE_EXT:
case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
/* ignore */
parselist++;
parselist++;
break;
/*
* GLX_EXT_visual_info extension
*/
case GLX_VISUAL_CAVEAT_EXT:
parselist++;
caveat = *parselist++; /* ignored for now */
break;
/*
* GLX_ARB_multisample
*/
case GLX_SAMPLE_BUFFERS_ARB:
case GLX_SAMPLES_ARB:
parselist++;
if (*parselist++ != 0) {
/* ms not supported */
return NULL;
}
break;
/*
* FBConfig attribs.
*/
case GLX_RENDER_TYPE:
if (!fbConfig)
return NULL;
parselist++;
if (*parselist & GLX_RGBA_BIT) {
rgb_flag = GL_TRUE;
}
else if (*parselist & GLX_COLOR_INDEX_BIT) {
rgb_flag = GL_FALSE;
}
else if (*parselist == 0) {
rgb_flag = GL_TRUE;
}
parselist++;
break;
case GLX_DRAWABLE_TYPE:
if (!fbConfig)
return NULL;
parselist++;
if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
return NULL; /* bad bit */
}
parselist++;
break;
case GLX_FBCONFIG_ID:
case GLX_VISUAL_ID:
if (!fbConfig)
return NULL;
parselist++;
desiredVisualID = *parselist++;
break;
case GLX_X_RENDERABLE:
case GLX_MAX_PBUFFER_WIDTH:
case GLX_MAX_PBUFFER_HEIGHT:
case GLX_MAX_PBUFFER_PIXELS:
if (!fbConfig)
return NULL; /* invalid config option */
parselist += 2; /* ignore the parameter */
break;
#ifdef GLX_EXT_texture_from_pixmap
case GLX_BIND_TO_TEXTURE_RGB_EXT:
parselist++; /*skip*/
break;
case GLX_BIND_TO_TEXTURE_RGBA_EXT:
parselist++; /*skip*/
break;
case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
parselist++; /*skip*/
break;
case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
parselist++;
if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
GLX_TEXTURE_2D_BIT_EXT |
GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
/* invalid bit */
return NULL;
}
break;
case GLX_Y_INVERTED_EXT:
parselist++; /*skip*/
break;
#endif
case None:
/* end of list */
break;
default:
/* undefined attribute */
_mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
*parselist);
return NULL;
}
}
(void) caveat;
/*
* Since we're only simulating the GLX extension this function will never
* find any real GL visuals. Instead, all we can do is try to find an RGB
* or CI visual of appropriate depth. Other requested attributes such as
* double buffering, depth buffer, etc. will be associated with the X
* visual and stored in the VisualTable[].
*/
if (desiredVisualID != -1) {
/* try to get a specific visual, by visualID */
XVisualInfo temp;
int n;
temp.visualid = desiredVisualID;
temp.screen = screen;
vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
if (vis) {
/* give the visual some useful GLX attributes */
double_flag = GL_TRUE;
rgb_flag = GL_TRUE;
}
}
else if (level==0) {
/* normal color planes */
/* Get an RGB visual */
int min_rgb = min_red + min_green + min_blue;
if (min_rgb>1 && min_rgb<8) {
/* a special case to be sure we can get a monochrome visual */
min_rgb = 1;
}
vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
}
else {
_mesa_warning(NULL, "overlay not supported");
return NULL;
}
if (vis) {
/* Note: we're not exactly obeying the glXChooseVisual rules here.
* When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
* largest depth buffer size, which is 32bits/value. Instead, we
* return 16 to maintain performance with earlier versions of Mesa.
*/
if (stencil_size > 0)
depth_size = 24; /* if Z and stencil, always use 24+8 format */
else if (depth_size > 24)
depth_size = 32;
else if (depth_size > 16)
depth_size = 24;
else if (depth_size > 0) {
depth_size = default_depth_bits();
}
if (!alpha_flag) {
alpha_flag = default_alpha_bits() > 0;
}
/* we only support one size of stencil and accum buffers. */
if (stencil_size > 0)
stencil_size = 8;
if (accumRedSize > 0 ||
accumGreenSize > 0 ||
accumBlueSize > 0 ||
accumAlphaSize > 0) {
accumRedSize =
accumGreenSize =
accumBlueSize = default_accum_bits();
accumAlphaSize = alpha_flag ? accumRedSize : 0;
}
xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
stereo_flag, depth_size, stencil_size,
accumRedSize, accumGreenSize,
accumBlueSize, accumAlphaSize, level, numAux );
}
return xmvis;
}
PUBLIC XVisualInfo *
glXChooseVisual( Display *dpy, int screen, int *list )
{
XMesaVisual xmvis;
/* register ourselves as an extension on this display */
register_with_display(dpy);
xmvis = choose_visual(dpy, screen, list, GL_FALSE);
if (xmvis) {
/* create a new vishandle - the cached one may be stale */
xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
if (xmvis->vishandle) {
memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
}
return xmvis->vishandle;
}
else
return NULL;
}
/**
* Helper function used by other glXCreateContext functions.
*/
static GLXContext
create_context(Display *dpy, XMesaVisual xmvis,
XMesaContext shareCtx, Bool direct,
unsigned major, unsigned minor,
unsigned profileMask, unsigned contextFlags)
{
GLXContext glxCtx;
if (!dpy || !xmvis)
return 0;
glxCtx = CALLOC_STRUCT(__GLXcontextRec);
if (!glxCtx)
return 0;
/* deallocate unused windows/buffers */
#if 0
XMesaGarbageCollect();
#endif
glxCtx->xmesaContext = XMesaCreateContext(xmvis, shareCtx, major, minor,
profileMask, contextFlags);
if (!glxCtx->xmesaContext) {
free(glxCtx);
return NULL;
}
glxCtx->isDirect = DEFAULT_DIRECT;
glxCtx->currentDpy = dpy;
glxCtx->xid = (XID) glxCtx; /* self pointer */
return glxCtx;
}
PUBLIC GLXContext
glXCreateContext( Display *dpy, XVisualInfo *visinfo,
GLXContext shareCtx, Bool direct )
{
XMesaVisual xmvis;
xmvis = find_glx_visual( dpy, visinfo );
if (!xmvis) {
/* This visual wasn't found with glXChooseVisual() */
xmvis = create_glx_visual( dpy, visinfo );
if (!xmvis) {
/* unusable visual */
return NULL;
}
}
return create_context(dpy, xmvis,
shareCtx ? shareCtx->xmesaContext : NULL,
direct,
1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
}
/* XXX these may have to be removed due to thread-safety issues. */
static GLXContext MakeCurrent_PrevContext = 0;
static GLXDrawable MakeCurrent_PrevDrawable = 0;
static GLXDrawable MakeCurrent_PrevReadable = 0;
static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
/* GLX 1.3 and later */
PUBLIC Bool
glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
GLXDrawable read, GLXContext ctx )
{
GLXContext glxCtx = ctx;
static boolean firsttime = 1, no_rast = 0;
if (firsttime) {
no_rast = getenv("SP_NO_RAST") != NULL;
firsttime = 0;
}
if (ctx && draw && read) {
XMesaBuffer drawBuffer, readBuffer;
XMesaContext xmctx = glxCtx->xmesaContext;
/* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
if (ctx == MakeCurrent_PrevContext
&& draw == MakeCurrent_PrevDrawable) {
drawBuffer = MakeCurrent_PrevDrawBuffer;
}
else {
drawBuffer = XMesaFindBuffer( dpy, draw );
}
if (!drawBuffer) {
/* drawable must be a new window! */
drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
if (!drawBuffer) {
/* Out of memory, or context/drawable depth mismatch */
return False;
}
}
/* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
if (ctx == MakeCurrent_PrevContext
&& read == MakeCurrent_PrevReadable) {
readBuffer = MakeCurrent_PrevReadBuffer;
}
else {
readBuffer = XMesaFindBuffer( dpy, read );
}
if (!readBuffer) {
/* drawable must be a new window! */
readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
if (!readBuffer) {
/* Out of memory, or context/drawable depth mismatch */
return False;
}
}
if (no_rast &&
MakeCurrent_PrevContext == ctx &&
MakeCurrent_PrevDrawable == draw &&
MakeCurrent_PrevReadable == read &&
MakeCurrent_PrevDrawBuffer == drawBuffer &&
MakeCurrent_PrevReadBuffer == readBuffer)
return True;
MakeCurrent_PrevContext = ctx;
MakeCurrent_PrevDrawable = draw;
MakeCurrent_PrevReadable = read;
MakeCurrent_PrevDrawBuffer = drawBuffer;
MakeCurrent_PrevReadBuffer = readBuffer;
/* Now make current! */
if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
ctx->currentDpy = dpy;
ctx->currentDrawable = draw;
ctx->currentReadable = read;
SetCurrentContext(ctx);
return True;
}
else {
return False;
}
}
else if (!ctx && !draw && !read) {
/* release current context w/out assigning new one. */
XMesaMakeCurrent2( NULL, NULL, NULL );
MakeCurrent_PrevContext = 0;
MakeCurrent_PrevDrawable = 0;
MakeCurrent_PrevReadable = 0;
MakeCurrent_PrevDrawBuffer = 0;
MakeCurrent_PrevReadBuffer = 0;
SetCurrentContext(NULL);
return True;
}
else {
/* The args must either all be non-zero or all zero.
* This is an error.
*/
return False;
}
}
PUBLIC Bool
glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
{
return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
}
PUBLIC GLXContext
glXGetCurrentContext(void)
{
return GetCurrentContext();
}
PUBLIC Display *
glXGetCurrentDisplay(void)
{
GLXContext glxCtx = glXGetCurrentContext();
return glxCtx ? glxCtx->currentDpy : NULL;
}
PUBLIC Display *
glXGetCurrentDisplayEXT(void)
{
return glXGetCurrentDisplay();
}
PUBLIC GLXDrawable
glXGetCurrentDrawable(void)
{
GLXContext gc = glXGetCurrentContext();
return gc ? gc->currentDrawable : 0;
}
PUBLIC GLXDrawable
glXGetCurrentReadDrawable(void)
{
GLXContext gc = glXGetCurrentContext();
return gc ? gc->currentReadable : 0;
}
PUBLIC GLXDrawable
glXGetCurrentReadDrawableSGI(void)
{
return glXGetCurrentReadDrawable();
}
PUBLIC GLXPixmap
glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
{
XMesaVisual v;
XMesaBuffer b;
v = find_glx_visual( dpy, visinfo );
if (!v) {
v = create_glx_visual( dpy, visinfo );
if (!v) {
/* unusable visual */
return 0;
}
}
b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
if (!b) {
return 0;
}
return b->ws.drawable;
}
/*** GLX_MESA_pixmap_colormap ***/
PUBLIC GLXPixmap
glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
Pixmap pixmap, Colormap cmap )
{
XMesaVisual v;
XMesaBuffer b;
v = find_glx_visual( dpy, visinfo );
if (!v) {
v = create_glx_visual( dpy, visinfo );
if (!v) {
/* unusable visual */
return 0;
}
}
b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
if (!b) {
return 0;
}
return b->ws.drawable;
}
PUBLIC void
glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
{
XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
if (b) {
XMesaDestroyBuffer(b);
}
else if (_mesa_getenv("MESA_DEBUG")) {
_mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
}
}
PUBLIC void
glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
unsigned long mask )
{
XMesaContext xm_src = src->xmesaContext;
XMesaContext xm_dst = dst->xmesaContext;
(void) dpy;
if (MakeCurrent_PrevContext == src) {
glFlush();
}
XMesaCopyContext(xm_src, xm_dst, mask);
}
PUBLIC Bool
glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
{
int op, ev, err;
/* Mesa's GLX isn't really an X extension but we try to act like one. */
if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
ev = err = 0;
if (errorBase)
*errorBase = err;
if (eventBase)
*eventBase = ev;
return True; /* we're faking GLX so always return success */
}
PUBLIC void
glXDestroyContext( Display *dpy, GLXContext ctx )
{
GLXContext glxCtx = ctx;
(void) dpy;
MakeCurrent_PrevContext = 0;
MakeCurrent_PrevDrawable = 0;
MakeCurrent_PrevReadable = 0;
MakeCurrent_PrevDrawBuffer = 0;
MakeCurrent_PrevReadBuffer = 0;
XMesaDestroyContext( glxCtx->xmesaContext );
XMesaGarbageCollect();
free(glxCtx);
}
PUBLIC Bool
glXIsDirect( Display *dpy, GLXContext ctx )
{
GLXContext glxCtx = ctx;
(void) ctx;
return glxCtx->isDirect;
}
PUBLIC void
glXSwapBuffers( Display *dpy, GLXDrawable drawable )
{
XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
static boolean firsttime = 1, no_rast = 0;
if (firsttime) {
no_rast = getenv("SP_NO_RAST") != NULL;
firsttime = 0;
}
if (no_rast)
return;
if (buffer) {
XMesaSwapBuffers(buffer);
}
else if (_mesa_getenv("MESA_DEBUG")) {
_mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
(int) drawable);
}
}
/*** GLX_MESA_copy_sub_buffer ***/
PUBLIC void
glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
int x, int y, int width, int height)
{
XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
if (buffer) {
XMesaCopySubBuffer(buffer, x, y, width, height);
}
else if (_mesa_getenv("MESA_DEBUG")) {
_mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
}
}
PUBLIC Bool
glXQueryVersion( Display *dpy, int *maj, int *min )
{
(void) dpy;
/* Return GLX version, not Mesa version */
assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
*maj = CLIENT_MAJOR_VERSION;
*min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
return True;
}
/*
* Query the GLX attributes of the given XVisualInfo.
*/
static int
get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
{
ASSERT(xmvis);
switch(attrib) {
case GLX_USE_GL:
if (fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = (int) True;
return 0;
case GLX_BUFFER_SIZE:
*value = xmvis->visinfo->depth;
return 0;
case GLX_LEVEL:
*value = xmvis->mesa_visual.level;
return 0;
case GLX_RGBA:
if (fbconfig)
return GLX_BAD_ATTRIBUTE;
if (xmvis->mesa_visual.rgbMode) {
*value = True;
}
else {
*value = False;
}
return 0;
case GLX_DOUBLEBUFFER:
*value = (int) xmvis->mesa_visual.doubleBufferMode;
return 0;
case GLX_STEREO:
*value = (int) xmvis->mesa_visual.stereoMode;
return 0;
case GLX_AUX_BUFFERS:
*value = xmvis->mesa_visual.numAuxBuffers;
return 0;
case GLX_RED_SIZE:
*value = xmvis->mesa_visual.redBits;
return 0;
case GLX_GREEN_SIZE:
*value = xmvis->mesa_visual.greenBits;
return 0;
case GLX_BLUE_SIZE:
*value = xmvis->mesa_visual.blueBits;
return 0;
case GLX_ALPHA_SIZE:
*value = xmvis->mesa_visual.alphaBits;
return 0;
case GLX_DEPTH_SIZE:
*value = xmvis->mesa_visual.depthBits;
return 0;
case GLX_STENCIL_SIZE:
*value = xmvis->mesa_visual.stencilBits;
return 0;
case GLX_ACCUM_RED_SIZE:
*value = xmvis->mesa_visual.accumRedBits;
return 0;
case GLX_ACCUM_GREEN_SIZE:
*value = xmvis->mesa_visual.accumGreenBits;
return 0;
case GLX_ACCUM_BLUE_SIZE:
*value = xmvis->mesa_visual.accumBlueBits;
return 0;
case GLX_ACCUM_ALPHA_SIZE:
*value = xmvis->mesa_visual.accumAlphaBits;
return 0;
/*
* GLX_EXT_visual_info extension
*/
case GLX_X_VISUAL_TYPE_EXT:
switch (xmvis->visinfo->CLASS) {
case StaticGray: *value = GLX_STATIC_GRAY_EXT; return 0;
case GrayScale: *value = GLX_GRAY_SCALE_EXT; return 0;
case StaticColor: *value = GLX_STATIC_GRAY_EXT; return 0;
case PseudoColor: *value = GLX_PSEUDO_COLOR_EXT; return 0;
case TrueColor: *value = GLX_TRUE_COLOR_EXT; return 0;
case DirectColor: *value = GLX_DIRECT_COLOR_EXT; return 0;
}
return 0;
case GLX_TRANSPARENT_TYPE_EXT:
/* normal planes */
*value = GLX_NONE_EXT;
return 0;
case GLX_TRANSPARENT_INDEX_VALUE_EXT:
/* undefined */
return 0;
case GLX_TRANSPARENT_RED_VALUE_EXT:
/* undefined */
return 0;
case GLX_TRANSPARENT_GREEN_VALUE_EXT:
/* undefined */
return 0;
case GLX_TRANSPARENT_BLUE_VALUE_EXT:
/* undefined */
return 0;
case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
/* undefined */
return 0;
/*
* GLX_EXT_visual_info extension
*/
case GLX_VISUAL_CAVEAT_EXT:
/* test for zero, just in case */
if (xmvis->mesa_visual.visualRating > 0)
*value = xmvis->mesa_visual.visualRating;
else
*value = GLX_NONE_EXT;
return 0;
/*
* GLX_ARB_multisample
*/
case GLX_SAMPLE_BUFFERS_ARB:
*value = 0;
return 0;
case GLX_SAMPLES_ARB:
*value = 0;
return 0;
/*
* For FBConfigs:
*/
case GLX_SCREEN_EXT:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = xmvis->visinfo->screen;
break;
case GLX_DRAWABLE_TYPE: /*SGIX too */
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
break;
case GLX_RENDER_TYPE_SGIX:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
if (xmvis->mesa_visual.rgbMode)
*value = GLX_RGBA_BIT;
else
*value = GLX_COLOR_INDEX_BIT;
break;
case GLX_X_RENDERABLE_SGIX:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = True; /* XXX really? */
break;
case GLX_FBCONFIG_ID_SGIX:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = xmvis->visinfo->visualid;
break;
case GLX_MAX_PBUFFER_WIDTH:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
/* XXX or MAX_WIDTH? */
*value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
break;
case GLX_MAX_PBUFFER_HEIGHT:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
break;
case GLX_MAX_PBUFFER_PIXELS:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
DisplayHeight(xmvis->display, xmvis->visinfo->screen);
break;
case GLX_VISUAL_ID:
if (!fbconfig)
return GLX_BAD_ATTRIBUTE;
*value = xmvis->visinfo->visualid;
break;
#ifdef GLX_EXT_texture_from_pixmap
case GLX_BIND_TO_TEXTURE_RGB_EXT:
*value = True; /*XXX*/
break;
case GLX_BIND_TO_TEXTURE_RGBA_EXT:
/* XXX review */
*value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
break;
case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
*value = True; /*XXX*/
break;
case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
*value = (GLX_TEXTURE_1D_BIT_EXT |
GLX_TEXTURE_2D_BIT_EXT |
GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
break;
case GLX_Y_INVERTED_EXT:
*value = True; /*XXX*/
break;
#endif
default:
return GLX_BAD_ATTRIBUTE;
}
return Success;
}
PUBLIC int
glXGetConfig( Display *dpy, XVisualInfo *visinfo,
int attrib, int *value )
{
XMesaVisual xmvis;
int k;
if (!dpy || !visinfo)
return GLX_BAD_ATTRIBUTE;
xmvis = find_glx_visual( dpy, visinfo );
if (!xmvis) {
/* this visual wasn't obtained with glXChooseVisual */
xmvis = create_glx_visual( dpy, visinfo );
if (!xmvis) {
/* this visual can't be used for GL rendering */
if (attrib==GLX_USE_GL) {
*value = (int) False;
return 0;
}
else {
return GLX_BAD_VISUAL;
}
}
}
k = get_config(xmvis, attrib, value, GL_FALSE);
return k;
}
PUBLIC void
glXWaitGL( void )
{
XMesaContext xmesa = XMesaGetCurrentContext();
XMesaFlush( xmesa );
}
PUBLIC void
glXWaitX( void )
{
XMesaContext xmesa = XMesaGetCurrentContext();
XMesaFlush( xmesa );
}
static const char *
get_extensions( void )
{
return EXTENSIONS;
}
/* GLX 1.1 and later */
PUBLIC const char *
glXQueryExtensionsString( Display *dpy, int screen )
{
(void) dpy;
(void) screen;
return get_extensions();
}
/* GLX 1.1 and later */
PUBLIC const char *
glXQueryServerString( Display *dpy, int screen, int name )
{
static char version[1000];
sprintf(version, "%d.%d %s",
SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
(void) dpy;
(void) screen;
switch (name) {
case GLX_EXTENSIONS:
return get_extensions();
case GLX_VENDOR:
return VENDOR;
case GLX_VERSION:
return version;
default:
return NULL;
}
}
/* GLX 1.1 and later */
PUBLIC const char *
glXGetClientString( Display *dpy, int name )
{
static char version[1000];
sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
CLIENT_MINOR_VERSION, xmesa_get_name());
(void) dpy;
switch (name) {
case GLX_EXTENSIONS:
return get_extensions();
case GLX_VENDOR:
return VENDOR;
case GLX_VERSION:
return version;
default:
return NULL;
}
}
/*
* GLX 1.3 and later
*/
PUBLIC int
glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
int attribute, int *value)
{
XMesaVisual v = (XMesaVisual) config;
(void) dpy;
(void) config;
if (!dpy || !config || !value)
return -1;
return get_config(v, attribute, value, GL_TRUE);
}
PUBLIC GLXFBConfig *
glXGetFBConfigs( Display *dpy, int screen, int *nelements )
{
XVisualInfo *visuals, visTemplate;
const long visMask = VisualScreenMask;
int i;
/* Get list of all X visuals */
visTemplate.screen = screen;
visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
if (*nelements > 0) {
XMesaVisual *results;
results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
if (!results) {
*nelements = 0;
return NULL;
}
for (i = 0; i < *nelements; i++) {
results[i] = create_glx_visual(dpy, visuals + i);
if (!results[i]) {
*nelements = i;
break;
}
}
return (GLXFBConfig *) results;
}
return NULL;
}
PUBLIC GLXFBConfig *
glXChooseFBConfig(Display *dpy, int screen,
const int *attribList, int *nitems)
{
XMesaVisual xmvis;
/* register ourselves as an extension on this display */
register_with_display(dpy);
if (!attribList || !attribList[0]) {
/* return list of all configs (per GLX_SGIX_fbconfig spec) */
return glXGetFBConfigs(dpy, screen, nitems);
}
xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
if (xmvis) {
GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
if (!config) {
*nitems = 0;
return NULL;
}
*nitems = 1;
config[0] = (GLXFBConfig) xmvis;
return (GLXFBConfig *) config;
}
else {
*nitems = 0;
return NULL;
}
}
PUBLIC XVisualInfo *
glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
{
if (dpy && config) {
XMesaVisual xmvis = (XMesaVisual) config;
#if 0
return xmvis->vishandle;
#else
/* create a new vishandle - the cached one may be stale */
xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
if (xmvis->vishandle) {
memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
}
return xmvis->vishandle;
#endif
}
else {
return NULL;
}
}
PUBLIC GLXWindow
glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
const int *attribList)
{
XMesaVisual xmvis = (XMesaVisual) config;
XMesaBuffer xmbuf;
if (!xmvis)
return 0;
xmbuf = XMesaCreateWindowBuffer(xmvis, win);
if (!xmbuf)
return 0;
(void) dpy;
(void) attribList; /* Ignored in GLX 1.3 */
return win; /* A hack for now */
}
PUBLIC void
glXDestroyWindow( Display *dpy, GLXWindow window )
{
XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
if (b)
XMesaDestroyBuffer(b);
/* don't destroy X window */
}
/* XXX untested */
PUBLIC GLXPixmap
glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
const int *attribList)
{
XMesaVisual v = (XMesaVisual) config;
XMesaBuffer b;
const int *attr;
int target = 0, format = 0, mipmap = 0;
int value;
if (!dpy || !config || !pixmap)
return 0;
for (attr = attribList; attr && *attr; attr++) {
switch (*attr) {
case GLX_TEXTURE_FORMAT_EXT:
attr++;
switch (*attr) {
case GLX_TEXTURE_FORMAT_NONE_EXT:
case GLX_TEXTURE_FORMAT_RGB_EXT:
case GLX_TEXTURE_FORMAT_RGBA_EXT:
format = *attr;
break;
default:
/* error */
return 0;
}
break;
case GLX_TEXTURE_TARGET_EXT:
attr++;
switch (*attr) {
case GLX_TEXTURE_1D_EXT:
case GLX_TEXTURE_2D_EXT:
case GLX_TEXTURE_RECTANGLE_EXT:
target = *attr;
break;
default:
/* error */
return 0;
}
break;
case GLX_MIPMAP_TEXTURE_EXT:
attr++;
if (*attr)
mipmap = 1;
break;
default:
/* error */
return 0;
}
}
if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
&value, GL_TRUE) != Success
|| !value) {
return 0; /* error! */
}
}
else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
&value, GL_TRUE) != Success
|| !value) {
return 0; /* error! */
}
}
if (mipmap) {
if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
&value, GL_TRUE) != Success
|| !value) {
return 0; /* error! */
}
}
if (target == GLX_TEXTURE_1D_EXT) {
if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
&value, GL_TRUE) != Success
|| (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
return 0; /* error! */
}
}
else if (target == GLX_TEXTURE_2D_EXT) {
if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
&value, GL_TRUE) != Success
|| (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
return 0; /* error! */
}
}
if (target == GLX_TEXTURE_RECTANGLE_EXT) {
if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
&value, GL_TRUE) != Success
|| (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
return 0; /* error! */
}
}
if (format || target || mipmap) {
/* texture from pixmap */
b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
}
else {
b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
}
if (!b) {
return 0;
}
return pixmap;
}
PUBLIC void
glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
{
XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
if (b)
XMesaDestroyBuffer(b);
/* don't destroy X pixmap */
}
PUBLIC GLXPbuffer
glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
{
XMesaVisual xmvis = (XMesaVisual) config;
XMesaBuffer xmbuf;
const int *attrib;
int width = 0, height = 0;
GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
(void) dpy;
for (attrib = attribList; *attrib; attrib++) {
switch (*attrib) {
case GLX_PBUFFER_WIDTH:
attrib++;
width = *attrib;
break;
case GLX_PBUFFER_HEIGHT:
attrib++;
height = *attrib;
break;
case GLX_PRESERVED_CONTENTS:
attrib++;
preserveContents = *attrib;
break;
case GLX_LARGEST_PBUFFER:
attrib++;
useLargest = *attrib;
break;
default:
return 0;
}
}
if (width == 0 || height == 0)
return 0;
if (width > PBUFFER_MAX_SIZE || height > PBUFFER_MAX_SIZE) {
/* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
* allocate the largest possible buffer.
*/
if (useLargest) {
width = PBUFFER_MAX_SIZE;
height = PBUFFER_MAX_SIZE;
}
}
xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
/* A GLXPbuffer handle must be an X Drawable because that's what
* glXMakeCurrent takes.
*/
if (xmbuf) {
xmbuf->largestPbuffer = useLargest;
xmbuf->preservedContents = preserveContents;
return (GLXPbuffer) xmbuf->ws.drawable;
}
else {
return 0;
}
}
PUBLIC void
glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
{
XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
if (b) {
XMesaDestroyBuffer(b);
}
}
PUBLIC void
glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
unsigned int *value)
{
GLuint width, height;
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
if (!xmbuf)
return;
/* make sure buffer's dimensions are up to date */
xmesa_get_window_size(dpy, xmbuf, &width, &height);
switch (attribute) {
case GLX_WIDTH:
*value = width;
break;
case GLX_HEIGHT:
*value = height;
break;
case GLX_PRESERVED_CONTENTS:
*value = xmbuf->preservedContents;
break;
case GLX_LARGEST_PBUFFER:
*value = xmbuf->largestPbuffer;
break;
case GLX_FBCONFIG_ID:
*value = xmbuf->xm_visual->visinfo->visualid;
return;
#ifdef GLX_EXT_texture_from_pixmap
case GLX_TEXTURE_FORMAT_EXT:
*value = xmbuf->TextureFormat;
break;
case GLX_TEXTURE_TARGET_EXT:
*value = xmbuf->TextureTarget;
break;
case GLX_MIPMAP_TEXTURE_EXT:
*value = xmbuf->TextureMipmap;
break;
#endif
default:
return; /* raise BadValue error */
}
}
PUBLIC GLXContext
glXCreateNewContext( Display *dpy, GLXFBConfig config,
int renderType, GLXContext shareCtx, Bool direct )
{
XMesaVisual xmvis = (XMesaVisual) config;
if (!dpy || !config ||
(renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
return 0;
return create_context(dpy, xmvis,
shareCtx ? shareCtx->xmesaContext : NULL,
direct,
1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
}
PUBLIC int
glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
{
GLXContext glxCtx = ctx;
XMesaContext xmctx = glxCtx->xmesaContext;
(void) dpy;
(void) ctx;
switch (attribute) {
case GLX_FBCONFIG_ID:
*value = xmctx->xm_visual->visinfo->visualid;
break;
case GLX_RENDER_TYPE:
if (xmctx->xm_visual->mesa_visual.rgbMode)
*value = GLX_RGBA_TYPE;
else
*value = GLX_COLOR_INDEX_TYPE;
break;
case GLX_SCREEN:
*value = 0;
return Success;
default:
return GLX_BAD_ATTRIBUTE;
}
return 0;
}
PUBLIC void
glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
{
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
if (xmbuf)
xmbuf->selectedEvents = mask;
}
PUBLIC void
glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
{
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
if (xmbuf)
*mask = xmbuf->selectedEvents;
else
*mask = 0;
}
/*** GLX_SGI_swap_control ***/
PUBLIC int
glXSwapIntervalSGI(int interval)
{
(void) interval;
return 0;
}
/*** GLX_SGI_video_sync ***/
static unsigned int FrameCounter = 0;
PUBLIC int
glXGetVideoSyncSGI(unsigned int *count)
{
/* this is a bogus implementation */
*count = FrameCounter++;
return 0;
}
PUBLIC int
glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
{
if (divisor <= 0 || remainder < 0)
return GLX_BAD_VALUE;
/* this is a bogus implementation */
FrameCounter++;
while (FrameCounter % divisor != remainder)
FrameCounter++;
*count = FrameCounter;
return 0;
}
/*** GLX_SGI_make_current_read ***/
PUBLIC Bool
glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
GLXContext ctx)
{
return glXMakeContextCurrent( dpy, draw, read, ctx );
}
/* not used
static GLXDrawable
glXGetCurrentReadDrawableSGI(void)
{
return 0;
}
*/
/*** GLX_SGIX_video_source ***/
#if defined(_VL_H)
PUBLIC GLXVideoSourceSGIX
glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
VLPath path, int nodeClass, VLNode drainNode)
{
(void) dpy;
(void) screen;
(void) server;
(void) path;
(void) nodeClass;
(void) drainNode;
return 0;
}
PUBLIC void
glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
{
(void) dpy;
(void) src;
}
#endif
/*** GLX_EXT_import_context ***/
PUBLIC void
glXFreeContextEXT(Display *dpy, GLXContext context)
{
(void) dpy;
(void) context;
}
PUBLIC GLXContextID
glXGetContextIDEXT(const GLXContext context)
{
(void) context;
return 0;
}
PUBLIC GLXContext
glXImportContextEXT(Display *dpy, GLXContextID contextID)
{
(void) dpy;
(void) contextID;
return 0;
}
PUBLIC int
glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
int *value)
{
(void) dpy;
(void) context;
(void) attribute;
(void) value;
return 0;
}
/*** GLX_SGIX_fbconfig ***/
PUBLIC int
glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
int attribute, int *value)
{
return glXGetFBConfigAttrib(dpy, config, attribute, value);
}
PUBLIC GLXFBConfigSGIX *
glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
int *nelements)
{
return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
attrib_list, nelements);
}
PUBLIC GLXPixmap
glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
Pixmap pixmap)
{
XMesaVisual xmvis = (XMesaVisual) config;
XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
return xmbuf->ws.drawable; /* need to return an X ID */
}
PUBLIC GLXContext
glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
int renderType, GLXContext shareCtx,
Bool direct)
{
XMesaVisual xmvis = (XMesaVisual) config;
if (!dpy || !config ||
(renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
return 0;
return create_context(dpy, xmvis,
shareCtx ? shareCtx->xmesaContext : NULL,
direct,
1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
}
PUBLIC XVisualInfo *
glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
{
return glXGetVisualFromFBConfig(dpy, config);
}
PUBLIC GLXFBConfigSGIX
glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
{
XMesaVisual xmvis = find_glx_visual(dpy, vis);
if (!xmvis) {
/* This visual wasn't found with glXChooseVisual() */
xmvis = create_glx_visual(dpy, vis);
}
return (GLXFBConfigSGIX) xmvis;
}
/*** GLX_SGIX_pbuffer ***/
PUBLIC GLXPbufferSGIX
glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
unsigned int width, unsigned int height,
int *attribList)
{
XMesaVisual xmvis = (XMesaVisual) config;
XMesaBuffer xmbuf;
const int *attrib;
GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
(void) dpy;
for (attrib = attribList; attrib && *attrib; attrib++) {
switch (*attrib) {
case GLX_PRESERVED_CONTENTS_SGIX:
attrib++;
preserveContents = *attrib; /* ignored */
break;
case GLX_LARGEST_PBUFFER_SGIX:
attrib++;
useLargest = *attrib; /* ignored */
break;
default:
return 0;
}
}
/* not used at this time */
(void) useLargest;
(void) preserveContents;
xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
/* A GLXPbuffer handle must be an X Drawable because that's what
* glXMakeCurrent takes.
*/
return (GLXPbuffer) xmbuf->ws.drawable;
}
PUBLIC void
glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
{
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
if (xmbuf) {
XMesaDestroyBuffer(xmbuf);
}
}
PUBLIC int
glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
unsigned int *value)
{
const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
if (!xmbuf) {
/* Generate GLXBadPbufferSGIX for bad pbuffer */
return 0;
}
switch (attribute) {
case GLX_PRESERVED_CONTENTS_SGIX:
*value = True;
break;
case GLX_LARGEST_PBUFFER_SGIX:
*value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
break;
case GLX_WIDTH_SGIX:
*value = xmesa_buffer_width(xmbuf);
break;
case GLX_HEIGHT_SGIX:
*value = xmesa_buffer_height(xmbuf);
break;
case GLX_EVENT_MASK_SGIX:
*value = 0; /* XXX might be wrong */
break;
default:
*value = 0;
}
return 0;
}
PUBLIC void
glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
{
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
if (xmbuf) {
/* Note: we'll never generate clobber events */
xmbuf->selectedEvents = mask;
}
}
PUBLIC void
glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
unsigned long *mask)
{
XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
if (xmbuf) {
*mask = xmbuf->selectedEvents;
}
else {
*mask = 0;
}
}
/*** GLX_SGI_cushion ***/
PUBLIC void
glXCushionSGI(Display *dpy, Window win, float cushion)
{
(void) dpy;
(void) win;
(void) cushion;
}
/*** GLX_SGIX_video_resize ***/
PUBLIC int
glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
Window window)
{
(void) dpy;
(void) screen;
(void) channel;
(void) window;
return 0;
}
PUBLIC int
glXChannelRectSGIX(Display *dpy, int screen, int channel,
int x, int y, int w, int h)
{
(void) dpy;
(void) screen;
(void) channel;
(void) x;
(void) y;
(void) w;
(void) h;
return 0;
}
PUBLIC int
glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
int *x, int *y, int *w, int *h)
{
(void) dpy;
(void) screen;
(void) channel;
(void) x;
(void) y;
(void) w;
(void) h;
return 0;
}
PUBLIC int
glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
int *dx, int *dy, int *dw, int *dh)
{
(void) dpy;
(void) screen;
(void) channel;
(void) dx;
(void) dy;
(void) dw;
(void) dh;
return 0;
}
PUBLIC int
glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
{
(void) dpy;
(void) screen;
(void) channel;
(void) synctype;
return 0;
}
/*** GLX_SGIX_dmbuffer **/
#if defined(_DM_BUFFER_H_)
PUBLIC Bool
glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
DMparams *params, DMbuffer dmbuffer)
{
(void) dpy;
(void) pbuffer;
(void) params;
(void) dmbuffer;
return False;
}
#endif
/*** GLX_SGIX_swap_group ***/
PUBLIC void
glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
{
(void) dpy;
(void) drawable;
(void) member;
}
/*** GLX_SGIX_swap_barrier ***/
PUBLIC void
glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
{
(void) dpy;
(void) drawable;
(void) barrier;
}
PUBLIC Bool
glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
{
(void) dpy;
(void) screen;
(void) max;
return False;
}
/*** GLX_SUN_get_transparent_index ***/
PUBLIC Status
glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
long *pTransparent)
{
(void) dpy;
(void) overlay;
(void) underlay;
(void) pTransparent;
return 0;
}
/*** GLX_MESA_release_buffers ***/
/*
* Release the depth, stencil, accum buffers attached to a GLXDrawable
* (a window or pixmap) prior to destroying the GLXDrawable.
*/
PUBLIC Bool
glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
{
XMesaBuffer b = XMesaFindBuffer(dpy, d);
if (b) {
XMesaDestroyBuffer(b);
return True;
}
return False;
}
/*** GLX_EXT_texture_from_pixmap ***/
PUBLIC void
glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
const int *attrib_list)
{
XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
if (b)
XMesaBindTexImage(dpy, b, buffer, attrib_list);
}
PUBLIC void
glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
{
XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
if (b)
XMesaReleaseTexImage(dpy, b, buffer);
}
/*** GLX_ARB_create_context ***/
GLXContext
glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
GLXContext shareCtx, Bool direct,
const int *attrib_list)
{
XMesaVisual xmvis = (XMesaVisual) config;
int majorVersion = 1, minorVersion = 0;
int contextFlags = 0x0;
int profileMask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
int renderType = GLX_RGBA_TYPE;
unsigned i;
Bool done = False;
const int contextFlagsAll = (GLX_CONTEXT_DEBUG_BIT_ARB |
GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
/* parse attrib_list */
for (i = 0; !done && attrib_list && attrib_list[i]; i++) {
switch (attrib_list[i]) {
case GLX_CONTEXT_MAJOR_VERSION_ARB:
majorVersion = attrib_list[++i];
break;
case GLX_CONTEXT_MINOR_VERSION_ARB:
minorVersion = attrib_list[++i];
break;
case GLX_CONTEXT_FLAGS_ARB:
contextFlags = attrib_list[++i];
break;
case GLX_CONTEXT_PROFILE_MASK_ARB:
profileMask = attrib_list[++i];
break;
case GLX_RENDER_TYPE:
renderType = attrib_list[++i];
break;
case 0:
/* end of list */
done = True;
break;
default:
/* bad attribute */
/* XXX generate BadValue X Error */
return NULL;
}
}
/* check contextFlags */
if (contextFlags & ~contextFlagsAll) {
return NULL; /* generate BadValue X Error */
}
/* check profileMask */
if (profileMask != GLX_CONTEXT_CORE_PROFILE_BIT_ARB &&
profileMask != GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
return NULL; /* generate BadValue X Error */
}
/* check version (generate BadMatch if bad) */
switch (majorVersion) {
case 1:
if (minorVersion < 0 || minorVersion > 5)
return NULL;
break;
case 2:
if (minorVersion < 0 || minorVersion > 1)
return NULL;
break;
case 3:
if (minorVersion < 0 || minorVersion > 2)
return NULL;
break;
case 4:
if (minorVersion < 0 || minorVersion > 0)
return NULL;
break;
default:
return NULL;
}
if ((contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
majorVersion < 3)
return NULL; /* generate GLXBadProfileARB */
if (renderType == GLX_COLOR_INDEX_TYPE && majorVersion >= 3)
return NULL; /* generate BadMatch */
return create_context(dpy, xmvis,
shareCtx ? shareCtx->xmesaContext : NULL,
direct,
majorVersion, minorVersion,
profileMask, contextFlags);
}