src/glx/x11/clientattrib.c

   1 /* $XFree86: xc/lib/GL/glx/clientattrib.c,v 1.5 2001/03/21 16:04:39 dawes Exp $ */
   2 /*
   3 ** License Applicability. Except to the extent portions of this file are
   4 ** made subject to an alternative license as permitted in the SGI Free
   5 ** Software License B, Version 1.1 (the "License"), the contents of this
   6 ** file are subject only to the provisions of the License. You may not use
   7 ** this file except in compliance with the License. You may obtain a copy
   8 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   9 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  10 **
  11 ** http://oss.sgi.com/projects/FreeB
  12 **
  13 ** Note that, as provided in the License, the Software is distributed on an
  14 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  15 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  16 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  17 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  18 **
  19 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  20 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  21 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  22 ** Copyright in any portions created by third parties is as indicated
  23 ** elsewhere herein. All Rights Reserved.
  24 **
  25 ** Additional Notice Provisions: The application programming interfaces
  26 ** established by SGI in conjunction with the Original Code are The
  27 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  28 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  29 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  30 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  31 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  32 ** published by SGI, but has not been independently verified as being
  33 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  34 **
  35 */
  36
  37 #include <assert.h>
  38 #include "glxclient.h"
  39 #include "indirect.h"
  40 #include "indirect_vertex_array.h"
  41
  42 /*****************************************************************************/
  43
  44 static void
  45 do_enable_disable(GLenum array, GLboolean val )
  46 {
  47     __GLXcontext *gc = __glXGetCurrentContext();
  48     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
  49     unsigned index = 0;
  50
  51     if ( array == GL_TEXTURE_COORD_ARRAY ) {
  52         index = __glXGetActiveTextureUnit( state );
  53     }
  54
  55     if ( ! __glXSetArrayEnable( state, array, index, val ) ) {
  56         __glXSetError(gc, GL_INVALID_ENUM);
  57     }
  58 }
  59
  60 void __indirect_glEnableClientState(GLenum array)
  61 {
  62     do_enable_disable( array, GL_TRUE );
  63 }
  64
  65 void __indirect_glDisableClientState(GLenum array)
  66 {
  67     do_enable_disable( array, GL_FALSE );
  68 }
  69
  70 /************************************************************************/
  71
  72 void __indirect_glPushClientAttrib(GLuint mask)
  73 {
  74     __GLXcontext *gc = __glXGetCurrentContext();
  75     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
  76     __GLXattribute **spp = gc->attributes.stackPointer, *sp;
  77
  78     if (spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]) {
  79         if (!(sp = *spp)) {
  80             sp = (__GLXattribute *)Xmalloc(sizeof(__GLXattribute));
  81             *spp = sp;
  82         }
  83         sp->mask = mask;
  84         gc->attributes.stackPointer = spp + 1;
  85         if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
  86             sp->storePack = state->storePack;
  87             sp->storeUnpack = state->storeUnpack;
  88         }
  89         if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
  90             __glXPushArrayState( state );
  91         }
  92     } else {
  93         __glXSetError(gc, GL_STACK_OVERFLOW);
  94         return;
  95     }
  96 }
  97
  98 void __indirect_glPopClientAttrib(void)
  99 {
 100     __GLXcontext *gc = __glXGetCurrentContext();
 101     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
 102     __GLXattribute **spp = gc->attributes.stackPointer, *sp;
 103     GLuint mask;
 104
 105     if (spp > &gc->attributes.stack[0]) {
 106         --spp;
 107         sp = *spp;
 108         assert(sp != 0);
 109         mask = sp->mask;
 110         gc->attributes.stackPointer = spp;
 111
 112         if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
 113             state->storePack = sp->storePack;
 114             state->storeUnpack = sp->storeUnpack;
 115         }
 116         if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
 117             __glXPopArrayState( state );
 118         }
 119
 120         sp->mask = 0;
 121     } else {
 122         __glXSetError(gc, GL_STACK_UNDERFLOW);
 123         return;
 124     }
 125 }
 126
 127 void __glFreeAttributeState(__GLXcontext *gc)
 128 {
 129     __GLXattribute *sp, **spp;
 130
 131     for (spp = &gc->attributes.stack[0];
 132          spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 133          spp++) {
 134         sp = *spp;
 135         if (sp) {
 136             XFree((char *)sp);
 137         } else {
 138             break;
 139         }
 140     }
 141 }