src/glx/x11/clientattrib.c

   1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
   2 /*
   3  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   4  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice including the dates of first publication and
  14  * either this permission notice or a reference to
  15  * http://oss.sgi.com/projects/FreeB/
  16  * shall be included in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  *
  26  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  27  * shall not be used in advertising or otherwise to promote the sale, use or
  28  * other dealings in this Software without prior written authorization from
  29  * Silicon Graphics, Inc.
  30  */
  31
  32 #include <assert.h>
  33 #include "glxclient.h"
  34 #include "indirect.h"
  35 #include "indirect_vertex_array.h"
  36
  37 /*****************************************************************************/
  38
  39 static void
  40 do_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
  55 void
  56 __indirect_glEnableClientState(GLenum array)
  57 {
  58    do_enable_disable(array, GL_TRUE);
  59 }
  60
  61 void
  62 __indirect_glDisableClientState(GLenum array)
  63 {
  64    do_enable_disable(array, GL_FALSE);
  65 }
  66
  67 /************************************************************************/
  68
  69 void
  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
  97 void
  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
 128 void
 129 __glFreeAttributeState(__GLXcontext * gc)
 130 {
 131    __GLXattribute *sp, **spp;
 132
 133    for (spp = &gc->attributes.stack[0];
 134         spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]; spp++) {
 135       sp = *spp;
 136       if (sp) {
 137          XFree((char *) sp);
 138       }
 139       else {
 140          break;
 141       }
 142    }
 143 }