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/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and/or associated documentation files (the
* "Materials"), to deal in the Materials without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Materials, and to
* permit persons to whom the Materials are furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* unaltered in all copies or substantial portions of the Materials.
* Any additions, deletions, or changes to the original source files
* must be clearly indicated in accompanying documentation.
*
* If only executable code is distributed, then the accompanying
* documentation must state that "this software is based in part on the
* work of the Khronos Group."
*
* THE MATERIALS ARE 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 THE AUTHORS OR COPYRIGHT HOLDERS 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
* MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
#include <X11/Xlibint.h>
#include "libglxproto.h"
#include <GL/glx.h>
#include <GL/glxproto.h>
/*!
* Reads a reply from the server, including any additional data.
*
* This function will read a reply from the server, and it will optionally
* allocate a buffer and read any variable-length data in the reply.
*
* If \c replyData is not \c NULL and the reply contains additional data, then
* this function will allocate a buffer and read the data into it.
*
* If \c replyData is \c NULL, then the caller must read any data in the reply.
*
* If the last request generates an error, then it will return the error code,
* but it will not call the normal X error handler.
*
* \param dpyInfo The display connection.
* \param[out] reply Returns the reply structure.
* \param[out] replyData If not \c NULL, returns any additional reply data.
* \return \c Success on a successful reply. If the server sent back an error,
* then the error code is returned. If something else fails, then -1 is
* returned.
*/
static Status ReadReply(__GLXdisplayInfo *dpyInfo, xReply *reply, void **replyData)
{
Display *dpy = dpyInfo->dpy;
_XAsyncHandler async;
_XAsyncErrorState state = {};
Status error = Success;
state.min_sequence_number = state.max_sequence_number = dpy->request;
state.major_opcode = dpyInfo->glxMajorOpcode;
async.next = dpy->async_handlers;
async.handler = _XAsyncErrorHandler;
async.data = (XPointer) &state;
dpy->async_handlers = &async;
if (!_XReply(dpy, reply, 0, False)) {
error = -1;
}
DeqAsyncHandler(dpy, &async);
if (state.error_count) {
error = state.last_error_received;
if (error == Success) {
assert(error != Success);
error = -1;
}
}
if (replyData != NULL) {
void *data = NULL;
if (error == Success && reply->generic.length > 0) {
int length = reply->generic.length * 4;
data = malloc(length);
if (data != NULL) {
_XRead(dpyInfo->dpy, (char *) data, length);
} else {
_XEatData(dpyInfo->dpy, length);
error = -1;
}
}
*replyData = data;;
}
return error;
}
char *__glXQueryServerString(__GLXdisplayInfo *dpyInfo, int screen, int name)
{
Display *dpy = dpyInfo->dpy;
xGLXQueryServerStringReq *req;
xGLXSingleReply rep;
char *ret = NULL;
if (!dpyInfo->glxSupported) {
return NULL;
}
LockDisplay(dpy);
GetReq(GLXQueryServerString, req);
req->reqType = dpyInfo->glxMajorOpcode;
req->glxCode = X_GLXQueryServerString;
req->screen = screen;
req->name = name;
ReadReply(dpyInfo, (xReply *) &rep, (void **) &ret);
UnlockDisplay(dpy);
SyncHandle();
return ret;
}
int __glXGetDrawableScreen(__GLXdisplayInfo *dpyInfo, GLXDrawable drawable)
{
Display *dpy = dpyInfo->dpy;
xGLXGetDrawableAttributesReq *req;
xGLXGetDrawableAttributesReply rep;
int *attribs = NULL;
Status st;
if (drawable == None) {
return -1;
}
if (!dpyInfo->glxSupported) {
return 0;
}
LockDisplay(dpy);
GetReq(GLXGetDrawableAttributes, req);
req->reqType = dpyInfo->glxMajorOpcode;
req->glxCode = X_GLXGetDrawableAttributes;
req->drawable = drawable;
st = ReadReply(dpyInfo, (xReply *) &rep, (void **) &attribs);
UnlockDisplay(dpy);
SyncHandle();
if (st == Success) {
int screen = 0;
unsigned int i;
if (attribs != NULL) {
for (i=0; i<rep.numAttribs; i++) {
if (attribs[i * 2] == GLX_SCREEN) {
screen = attribs[i * 2 + 1];
break;
}
}
free(attribs);
}
return screen;
} else {
return -1;
}
}
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