Initial revision

1 files changed, 373 insertions, 0 deletions

diff --git a/GL/glx/single2.c b/GL/glx/single2.c
new file mode 100644
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--- /dev/null
+++ b/GL/glx/single2.c
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+/* $XFree86: xc/programs/Xserver/GL/glx/single2.c,v 1.6 2001/06/06 19:00:15 dawes Exp $ */
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+** 
+** http://oss.sgi.com/projects/FreeB
+** 
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+** 
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+** 
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#define NEED_REPLIES
+#include "glxserver.h"
+#include "glxutil.h"
+#include "glxext.h"
+#include "unpack.h"
+#include "g_disptab.h"
+#include "GL/glx_ansic.h"
+
+int __glXDisp_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    GLsizei size;
+    GLenum type;
+    __GLXcontext *cx;
+    int error;
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+
+    pc += __GLX_SINGLE_HDR_SIZE;
+    size = *(GLsizei *)(pc+0);
+    type = *(GLenum *)(pc+4);
+    if (cx->feedbackBufSize < size) {
+	cx->feedbackBuf = (GLfloat *) __glXRealloc(cx->feedbackBuf,
+						   (size_t)size 
+						   * __GLX_SIZE_FLOAT32);
+	if (!cx->feedbackBuf) {
+	    cl->client->errorValue = size;
+	    return BadAlloc;
+	}
+	cx->feedbackBufSize = size;
+    }
+    glFeedbackBuffer(size, type, cx->feedbackBuf);
+    __GLX_NOTE_UNFLUSHED_CMDS(cx);
+    return Success;
+}
+
+int __glXDisp_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    __GLXcontext *cx;
+    GLsizei size;
+    int error;
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+
+    pc += __GLX_SINGLE_HDR_SIZE;
+    size = *(GLsizei *)(pc+0);
+    if (cx->selectBufSize < size) {
+	cx->selectBuf = (GLuint *) __glXRealloc(cx->selectBuf,
+						(size_t) size 
+						* __GLX_SIZE_CARD32);
+	if (!cx->selectBuf) {
+	    cl->client->errorValue = size;
+	    return BadAlloc;
+	}
+	cx->selectBufSize = size;
+    }
+    glSelectBuffer(size, cx->selectBuf);
+    __GLX_NOTE_UNFLUSHED_CMDS(cx);
+    return Success;
+}
+
+int __glXDisp_RenderMode(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client;
+    xGLXRenderModeReply reply;
+    __GLXcontext *cx;
+    GLint nitems=0, retBytes=0, retval, newModeCheck;
+    GLubyte *retBuffer = NULL;
+    GLenum newMode;
+    int error;
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+
+    pc += __GLX_SINGLE_HDR_SIZE;
+    newMode = *(GLenum*) pc;
+    retval = glRenderMode(newMode);
+
+    /* Check that render mode worked */
+    glGetIntegerv(GL_RENDER_MODE, &newModeCheck);
+    if (newModeCheck != newMode) {
+	/* Render mode change failed.  Bail */
+	newMode = newModeCheck;
+	goto noChangeAllowed;
+    }
+
+    /*
+    ** Render mode might have still failed if we get here.  But in this
+    ** case we can't really tell, nor does it matter.  If it did fail, it
+    ** will return 0, and thus we won't send any data across the wire.
+    */
+
+    switch (cx->renderMode) {
+      case GL_RENDER:
+	cx->renderMode = newMode;
+	break;
+      case GL_FEEDBACK:
+	if (retval < 0) {
+	    /* Overflow happened. Copy the entire buffer */
+	    nitems = cx->feedbackBufSize;
+	} else {
+	    nitems = retval;
+	}
+	retBytes = nitems * __GLX_SIZE_FLOAT32;
+	retBuffer = (GLubyte*) cx->feedbackBuf;
+	cx->renderMode = newMode;
+	break;
+      case GL_SELECT:
+	if (retval < 0) {
+	    /* Overflow happened.  Copy the entire buffer */
+	    nitems = cx->selectBufSize;
+	} else {
+	    GLuint *bp = cx->selectBuf;
+	    GLint i;
+
+	    /*
+	    ** Figure out how many bytes of data need to be sent.  Parse
+	    ** the selection buffer to determine this fact as the
+	    ** return value is the number of hits, not the number of
+	    ** items in the buffer.
+	    */
+	    nitems = 0;
+	    i = retval;
+	    while (--i >= 0) {
+		GLuint n;
+
+		/* Parse select data for this hit */
+		n = *bp;
+		bp += 3 + n;
+	    }
+	    nitems = bp - cx->selectBuf;
+	}
+	retBytes = nitems * __GLX_SIZE_CARD32;
+	retBuffer = (GLubyte*) cx->selectBuf;
+	cx->renderMode = newMode;
+	break;
+    }
+
+    /*
+    ** First reply is the number of elements returned in the feedback or
+    ** selection array, as per the API for glRenderMode itself.
+    */
+  noChangeAllowed:;
+    client = cl->client;
+    reply.length = nitems;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.retval = retval;
+    reply.size = nitems;
+    reply.newMode = newMode;
+    WriteToClient(client, sz_xGLXRenderModeReply, (char *)&reply);
+    if (retBytes) {
+	WriteToClient(client, retBytes, (char *)retBuffer);
+    }
+    return Success;
+}
+
+int __glXDisp_Flush(__GLXclientState *cl, GLbyte *pc)
+{
+	__GLXcontext *cx;
+	int error;
+
+	cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+	if (!cx) {
+		return error;
+	}
+
+	glFlush();
+	__GLX_NOTE_FLUSHED_CMDS(cx);
+	return Success;
+}
+
+int __glXDisp_Finish(__GLXclientState *cl, GLbyte *pc)
+{
+    __GLXcontext *cx;
+    ClientPtr client;
+    int error;
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+
+    /* Do a local glFinish */
+    glFinish();
+    __GLX_NOTE_FLUSHED_CMDS(cx);
+
+    /* Send empty reply packet to indicate finish is finished */
+    client = cl->client;
+    __GLX_BEGIN_REPLY(0);
+    __GLX_SEND_HEADER();
+    return Success;
+}
+
+#define SEPARATOR " "
+
+char *__glXcombine_strings(const char *cext_string, const char *sext_string)
+{
+   size_t clen, slen;
+   char *combo_string, *token, *s1;
+   const char *s2, *end;
+
+   /* safeguard to prevent potentially fatal errors in the string functions */
+   if (!cext_string)
+      cext_string = "";
+   if (!sext_string)
+      sext_string = "";
+
+   /*
+   ** String can't be longer than min(cstring, sstring)
+   ** pull tokens out of shortest string
+   ** include space in combo_string for final separator and null terminator
+   */
+   if ( (clen = __glXStrlen(cext_string)) > (slen = __glXStrlen(sext_string)) ) {
+	combo_string = (char *) __glXMalloc(slen + 2);
+	s1 = (char *) __glXMalloc(slen + 2); __glXStrcpy(s1, sext_string);
+	s2 = cext_string;
+   } else {
+	combo_string = (char *) __glXMalloc(clen + 2);
+	s1 = (char *) __glXMalloc(clen + 2); __glXStrcpy(s1, cext_string);
+	s2 = sext_string;
+   }
+   if (!combo_string || !s1) {
+	if (combo_string) __glXFree(combo_string);
+	if (s1) __glXFree(s1);
+	return NULL;
+   }
+   combo_string[0] = '\0';
+
+   /* Get first extension token */
+   token = __glXStrtok( s1, SEPARATOR);
+   while ( token != NULL ) {
+
+	/*
+	** if token in second string then save it
+	** beware of extension names which are prefixes of other extension names
+	*/
+	const char *p = s2;
+	end = p + __glXStrlen(p);
+	while (p < end) {
+	    size_t n = __glXStrcspn(p, SEPARATOR);
+	    if ((__glXStrlen(token) == n) && (__glXStrncmp(token, p, n) == 0)) {
+		combo_string = __glXStrcat( combo_string, token);
+		combo_string = __glXStrcat( combo_string, SEPARATOR);
+	    }
+	    p += (n + 1);
+	}
+
+	/* Get next extension token */
+	token = __glXStrtok( NULL, SEPARATOR);
+   }
+   __glXFree(s1);
+   return combo_string;
+}
+
+int __glXDisp_GetString(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client;
+    __GLXcontext *cx;
+    GLenum name;
+    const char *string;
+    int error;
+    char *buf = NULL, *buf1 = NULL;
+    GLint length = 0;
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+
+    pc += __GLX_SINGLE_HDR_SIZE;
+    name = *(GLenum *)(pc + 0);
+    string = (const char *)glGetString(name);
+    client = cl->client;
+
+    /*
+    ** Restrict extensions to those that are supported by both the
+    ** implementation and the connection.  That is, return the
+    ** intersection of client, server, and core extension strings.
+    */
+    if (name == GL_EXTENSIONS) {
+	buf1 = __glXcombine_strings(string,
+				      cl->GLClientextensions);
+	buf = __glXcombine_strings(buf1,
+				      cx->pGlxScreen->GLextensions);
+	if (buf1 != NULL) {
+	    __glXFree(buf1);
+	}
+	string = buf;
+    }
+    if (string) {
+	length = __glXStrlen((const char *) string) + 1;
+    }
+
+    __GLX_BEGIN_REPLY(length);
+    __GLX_PUT_SIZE(length);
+    __GLX_SEND_HEADER();
+    WriteToClient(client, length, (char *) string); 
+    if (buf != NULL) {
+	__glXFree(buf);
+    }
+    return Success;
+}
+
+int __glXDisp_GetClipPlane(__GLXclientState *cl, GLbyte *pc)
+{
+    __GLXcontext *cx;
+    ClientPtr client = cl->client;
+    int error;
+    GLdouble answer[4];
+
+    cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+    if (!cx) {
+	return error;
+    }
+    pc += __GLX_SINGLE_HDR_SIZE;
+
+    __glXClearErrorOccured();
+    glGetClipPlane(*(GLenum   *)(pc + 0), answer);
+    if (__glXErrorOccured()) {
+	__GLX_BEGIN_REPLY(0);
+	__GLX_SEND_HEADER();
+    } else {
+	__GLX_BEGIN_REPLY(32);
+	__GLX_SEND_HEADER();
+	__GLX_SEND_DOUBLE_ARRAY(4);
+    }
+    return Success;
+}
+