391 lines
10 KiB
C
391 lines
10 KiB
C
/*
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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice including the dates of first publication and
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* either this permission notice or a reference to
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* http://oss.sgi.com/projects/FreeB/
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* shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of Silicon Graphics, Inc.
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* shall not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization from
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* Silicon Graphics, Inc.
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*/
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#define NEED_REPLIES
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "glxserver.h"
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#include "glxutil.h"
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#include "glxext.h"
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#include "indirect_dispatch.h"
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#include "unpack.h"
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#include "glapitable.h"
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#include "glapi.h"
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#include "glthread.h"
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#include "dispatch.h"
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int __glXDisp_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
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{
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GLsizei size;
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GLenum type;
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__GLXcontext *cx;
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int error;
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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pc += __GLX_SINGLE_HDR_SIZE;
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size = *(GLsizei *)(pc+0);
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type = *(GLenum *)(pc+4);
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if (cx->feedbackBufSize < size) {
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cx->feedbackBuf = (GLfloat *) xrealloc(cx->feedbackBuf,
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(size_t)size
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* __GLX_SIZE_FLOAT32);
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if (!cx->feedbackBuf) {
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cl->client->errorValue = size;
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return BadAlloc;
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}
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cx->feedbackBufSize = size;
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}
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CALL_FeedbackBuffer( GET_DISPATCH(), (size, type, cx->feedbackBuf) );
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__GLX_NOTE_UNFLUSHED_CMDS(cx);
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return Success;
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}
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int __glXDisp_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
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{
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__GLXcontext *cx;
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GLsizei size;
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int error;
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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pc += __GLX_SINGLE_HDR_SIZE;
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size = *(GLsizei *)(pc+0);
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if (cx->selectBufSize < size) {
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cx->selectBuf = (GLuint *) xrealloc(cx->selectBuf,
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(size_t) size
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* __GLX_SIZE_CARD32);
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if (!cx->selectBuf) {
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cl->client->errorValue = size;
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return BadAlloc;
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}
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cx->selectBufSize = size;
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}
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CALL_SelectBuffer( GET_DISPATCH(), (size, cx->selectBuf) );
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__GLX_NOTE_UNFLUSHED_CMDS(cx);
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return Success;
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}
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int __glXDisp_RenderMode(__GLXclientState *cl, GLbyte *pc)
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{
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ClientPtr client;
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xGLXRenderModeReply reply;
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__GLXcontext *cx;
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GLint nitems=0, retBytes=0, retval, newModeCheck;
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GLubyte *retBuffer = NULL;
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GLenum newMode;
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int error;
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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pc += __GLX_SINGLE_HDR_SIZE;
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newMode = *(GLenum*) pc;
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retval = CALL_RenderMode( GET_DISPATCH(), (newMode) );
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/* Check that render mode worked */
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CALL_GetIntegerv( GET_DISPATCH(), (GL_RENDER_MODE, &newModeCheck) );
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if (newModeCheck != newMode) {
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/* Render mode change failed. Bail */
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newMode = newModeCheck;
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goto noChangeAllowed;
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}
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/*
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** Render mode might have still failed if we get here. But in this
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** case we can't really tell, nor does it matter. If it did fail, it
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** will return 0, and thus we won't send any data across the wire.
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*/
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switch (cx->renderMode) {
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case GL_RENDER:
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cx->renderMode = newMode;
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break;
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case GL_FEEDBACK:
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if (retval < 0) {
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/* Overflow happened. Copy the entire buffer */
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nitems = cx->feedbackBufSize;
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} else {
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nitems = retval;
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}
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retBytes = nitems * __GLX_SIZE_FLOAT32;
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retBuffer = (GLubyte*) cx->feedbackBuf;
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cx->renderMode = newMode;
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break;
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case GL_SELECT:
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if (retval < 0) {
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/* Overflow happened. Copy the entire buffer */
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nitems = cx->selectBufSize;
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} else {
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GLuint *bp = cx->selectBuf;
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GLint i;
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/*
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** Figure out how many bytes of data need to be sent. Parse
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** the selection buffer to determine this fact as the
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** return value is the number of hits, not the number of
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** items in the buffer.
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*/
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nitems = 0;
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i = retval;
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while (--i >= 0) {
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GLuint n;
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/* Parse select data for this hit */
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n = *bp;
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bp += 3 + n;
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}
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nitems = bp - cx->selectBuf;
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}
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retBytes = nitems * __GLX_SIZE_CARD32;
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retBuffer = (GLubyte*) cx->selectBuf;
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cx->renderMode = newMode;
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break;
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}
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/*
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** First reply is the number of elements returned in the feedback or
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** selection array, as per the API for glRenderMode itself.
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*/
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noChangeAllowed:;
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client = cl->client;
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reply.length = nitems;
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reply.type = X_Reply;
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reply.sequenceNumber = client->sequence;
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reply.retval = retval;
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reply.size = nitems;
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reply.newMode = newMode;
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WriteToClient(client, sz_xGLXRenderModeReply, (char *)&reply);
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if (retBytes) {
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WriteToClient(client, retBytes, (char *)retBuffer);
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}
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return Success;
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}
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int __glXDisp_Flush(__GLXclientState *cl, GLbyte *pc)
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{
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__GLXcontext *cx;
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int error;
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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CALL_Flush( GET_DISPATCH(), () );
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__GLX_NOTE_FLUSHED_CMDS(cx);
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return Success;
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}
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int __glXDisp_Finish(__GLXclientState *cl, GLbyte *pc)
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{
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__GLXcontext *cx;
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ClientPtr client;
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int error;
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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/* Do a local glFinish */
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CALL_Finish( GET_DISPATCH(), () );
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__GLX_NOTE_FLUSHED_CMDS(cx);
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/* Send empty reply packet to indicate finish is finished */
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client = cl->client;
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__GLX_BEGIN_REPLY(0);
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__GLX_SEND_HEADER();
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return Success;
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}
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#define SEPARATOR " "
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char *__glXcombine_strings(const char *cext_string, const char *sext_string)
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{
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size_t clen, slen;
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char *combo_string, *token, *s1;
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const char *s2, *end;
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/* safeguard to prevent potentially fatal errors in the string functions */
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if (!cext_string)
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cext_string = "";
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if (!sext_string)
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sext_string = "";
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/*
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** String can't be longer than min(cstring, sstring)
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** pull tokens out of shortest string
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** include space in combo_string for final separator and null terminator
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*/
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clen = strlen(cext_string);
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slen = strlen(sext_string);
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if (clen > slen) {
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combo_string = (char *) xalloc(slen + 2);
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s1 = (char *) xalloc(slen + 2);
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if (s1) strcpy(s1, sext_string);
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s2 = cext_string;
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} else {
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combo_string = (char *) xalloc(clen + 2);
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s1 = (char *) xalloc(clen + 2);
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if (s1) strcpy(s1, cext_string);
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s2 = sext_string;
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}
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if (!combo_string || !s1) {
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if (combo_string)
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xfree(combo_string);
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if (s1)
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xfree(s1);
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return NULL;
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}
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combo_string[0] = '\0';
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/* Get first extension token */
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token = strtok( s1, SEPARATOR);
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while ( token != NULL ) {
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/*
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** if token in second string then save it
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** beware of extension names which are prefixes of other extension names
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*/
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const char *p = s2;
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end = p + strlen(p);
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while (p < end) {
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size_t n = strcspn(p, SEPARATOR);
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if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) {
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combo_string = strcat(combo_string, token);
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combo_string = strcat(combo_string, SEPARATOR);
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}
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p += (n + 1);
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}
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/* Get next extension token */
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token = strtok( NULL, SEPARATOR);
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}
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xfree(s1);
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return combo_string;
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}
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int DoGetString(__GLXclientState *cl, GLbyte *pc, GLboolean need_swap)
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{
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ClientPtr client;
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__GLXcontext *cx;
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GLenum name;
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const char *string;
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__GLX_DECLARE_SWAP_VARIABLES;
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int error;
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char *buf = NULL, *buf1 = NULL;
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GLint length = 0;
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/* If the client has the opposite byte order, swap the contextTag and
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* the name.
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*/
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if ( need_swap ) {
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__GLX_SWAP_INT(pc + 4);
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__GLX_SWAP_INT(pc + __GLX_SINGLE_HDR_SIZE);
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}
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cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
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if (!cx) {
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return error;
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}
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pc += __GLX_SINGLE_HDR_SIZE;
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name = *(GLenum *)(pc + 0);
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string = (const char *) CALL_GetString( GET_DISPATCH(), (name) );
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client = cl->client;
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/*
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** Restrict extensions to those that are supported by both the
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** implementation and the connection. That is, return the
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** intersection of client, server, and core extension strings.
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*/
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if (name == GL_EXTENSIONS) {
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buf1 = __glXcombine_strings(string,
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cl->GLClientextensions);
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buf = __glXcombine_strings(buf1,
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cx->pGlxScreen->GLextensions);
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if (buf1 != NULL) {
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xfree(buf1);
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}
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string = buf;
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}
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else if ( name == GL_VERSION ) {
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if ( atof( string ) > atof( GLServerVersion ) ) {
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size_t len = strlen( string ) + strlen( GLServerVersion ) + 4;
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buf = xalloc( len );
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if ( buf == NULL ) {
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string = GLServerVersion;
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}
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else {
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snprintf( buf, len, "%s (%s)", GLServerVersion, string );
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string = buf;
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}
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}
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}
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if (string) {
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length = strlen((const char *) string) + 1;
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}
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__GLX_BEGIN_REPLY(length);
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__GLX_PUT_SIZE(length);
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if ( need_swap ) {
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__GLX_SWAP_REPLY_SIZE();
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__GLX_SWAP_REPLY_HEADER();
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}
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__GLX_SEND_HEADER();
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WriteToClient(client, length, (char *) string);
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if (buf != NULL)
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xfree(buf);
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return Success;
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}
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int __glXDisp_GetString(__GLXclientState *cl, GLbyte *pc)
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{
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return DoGetString(cl, pc, GL_FALSE);
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}
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