src/glx/x11/clientattrib.c

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