clientattrib.c revision 163901bc7f89dc3a5c65d66b960f18dd561631c1 
1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31#include <assert.h>
32#include "glxclient.h"
33#include "indirect.h"
34#include "indirect_vertex_array.h"
35
36/*****************************************************************************/
37
38#ifndef GLX_USE_APPLEGL
39static void
40do_enable_disable(GLenum array, GLboolean val)
41{
42   __GLXcontext *gc = __glXGetCurrentContext();
43   __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
44   unsigned index = 0;
45
46   if (array == GL_TEXTURE_COORD_ARRAY) {
47      index = __glXGetActiveTextureUnit(state);
48   }
49
50   if (!__glXSetArrayEnable(state, array, index, val)) {
51      __glXSetError(gc, GL_INVALID_ENUM);
52   }
53}
54
55void
56__indirect_glEnableClientState(GLenum array)
57{
58   do_enable_disable(array, GL_TRUE);
59}
60
61void
62__indirect_glDisableClientState(GLenum array)
63{
64   do_enable_disable(array, GL_FALSE);
65}
66
67/************************************************************************/
68
69void
70__indirect_glPushClientAttrib(GLuint mask)
71{
72   __GLXcontext *gc = __glXGetCurrentContext();
73   __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
74   __GLXattribute **spp = gc->attributes.stackPointer, *sp;
75
76   if (spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]) {
77      if (!(sp = *spp)) {
78         sp = (__GLXattribute *) Xmalloc(sizeof(__GLXattribute));
79         *spp = sp;
80      }
81      sp->mask = mask;
82      gc->attributes.stackPointer = spp + 1;
83      if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
84         sp->storePack = state->storePack;
85         sp->storeUnpack = state->storeUnpack;
86      }
87      if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
88         __glXPushArrayState(state);
89      }
90   }
91   else {
92      __glXSetError(gc, GL_STACK_OVERFLOW);
93      return;
94   }
95}
96
97void
98__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   }
122   else {
123      __glXSetError(gc, GL_STACK_UNDERFLOW);
124      return;
125   }
126}
127#endif
128
129void
130__glFreeAttributeState(__GLXcontext * gc)
131{
132   __GLXattribute *sp, **spp;
133
134   for (spp = &gc->attributes.stack[0];
135        spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]; spp++) {
136      sp = *spp;
137      if (sp) {
138         XFree((char *) sp);
139      }
140      else {
141         break;
142      }
143   }
144}
145