4ee0a53de8
new license. If we want to, later we can import 4.4RC3 again and pick
up the files that have the new license, but for now the vendor branch
is "pure."
408 lines
11 KiB
C
408 lines
11 KiB
C
/* $XFree86: xc/programs/Xserver/GL/glx/single2.c,v 1.9 2004/02/11 09:18:15 alanh Exp $ */
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/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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*/
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#define NEED_REPLIES
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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 "unpack.h"
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#include "g_disptab.h"
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#include "GL/glx_ansic.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 *) __glXRealloc(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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glFeedbackBuffer(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 *) __glXRealloc(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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glSelectBuffer(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 = glRenderMode(newMode);
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/* Check that render mode worked */
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glGetIntegerv(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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glFlush();
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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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glFinish();
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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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if ( (clen = __glXStrlen(cext_string)) > (slen = __glXStrlen(sext_string)) ) {
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combo_string = (char *) __glXMalloc(slen + 2);
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s1 = (char *) __glXMalloc(slen + 2); __glXStrcpy(s1, sext_string);
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s2 = cext_string;
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} else {
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combo_string = (char *) __glXMalloc(clen + 2);
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s1 = (char *) __glXMalloc(clen + 2); __glXStrcpy(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) __glXFree(combo_string);
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if (s1) __glXFree(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 = __glXStrtok( 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 + __glXStrlen(p);
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while (p < end) {
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size_t n = __glXStrcspn(p, SEPARATOR);
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if ((__glXStrlen(token) == n) && (__glXStrncmp(token, p, n) == 0)) {
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combo_string = __glXStrcat( combo_string, token);
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combo_string = __glXStrcat( 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 = __glXStrtok( NULL, SEPARATOR);
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}
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__glXFree(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 *)glGetString(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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__glXFree(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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buf = __glXMalloc( __glXStrlen( string )
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+ __glXStrlen( GLServerVersion )
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+ 3 );
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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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__glXSprintf( buf, "%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 = __glXStrlen((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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__glXFree(buf);
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}
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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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int __glXDisp_GetClipPlane(__GLXclientState *cl, GLbyte *pc)
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{
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__GLXcontext *cx;
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ClientPtr client = cl->client;
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int error;
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GLdouble answer[4];
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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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__glXClearErrorOccured();
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glGetClipPlane(*(GLenum *)(pc + 0), answer);
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if (__glXErrorOccured()) {
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__GLX_BEGIN_REPLY(0);
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__GLX_SEND_HEADER();
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} else {
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__GLX_BEGIN_REPLY(32);
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__GLX_SEND_HEADER();
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__GLX_SEND_DOUBLE_ARRAY(4);
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}
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return Success;
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}
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