src/glx/clientattrib.c

   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 static void
  39 do_enable_disable(GLenum array, GLboolean val)
  40 {
  41    __GLXcontext *gc = __glXGetCurrentContext();
  42    __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
  43    unsigned index = 0;
  44
  45    if (array == GL_TEXTURE_COORD_ARRAY) {
  46       index = __glXGetActiveTextureUnit(state);
  47    }
  48
  49    if (!__glXSetArrayEnable(state, array, index, val)) {
  50       __glXSetError(gc, GL_INVALID_ENUM);
  51    }
  52 }
  53
  54 void
  55 __indirect_glEnableClientState(GLenum array)
  56 {
  57    do_enable_disable(array, GL_TRUE);
  58 }
  59
  60 void
  61 __indirect_glDisableClientState(GLenum array)
  62 {
  63    do_enable_disable(array, GL_FALSE);
  64 }
  65
  66 /************************************************************************/
  67
  68 void
  69 __indirect_glPushClientAttrib(GLuint mask)
  70 {
  71    __GLXcontext *gc = __glXGetCurrentContext();
  72    __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
  73    __GLXattribute **spp = gc->attributes.stackPointer, *sp;
  74
  75    if (spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]) {
  76       if (!(sp = *spp)) {
  77          sp = (__GLXattribute *) Xmalloc(sizeof(__GLXattribute));
  78          *spp = sp;
  79       }
  80       sp->mask = mask;
  81       gc->attributes.stackPointer = spp + 1;
  82       if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
  83          sp->storePack = state->storePack;
  84          sp->storeUnpack = state->storeUnpack;
  85       }
  86       if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
  87          __glXPushArrayState(state);
  88       }
  89    }
  90    else {
  91       __glXSetError(gc, GL_STACK_OVERFLOW);
  92       return;
  93    }
  94 }
  95
  96 void
  97 __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    }
 121    else {
 122       __glXSetError(gc, GL_STACK_UNDERFLOW);
 123       return;
 124    }
 125 }
 126
 127 void
 128 __glFreeAttributeState(__GLXcontext * gc)
 129 {
 130    __GLXattribute *sp, **spp;
 131
 132    for (spp = &gc->attributes.stack[0];
 133         spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]; spp++) {
 134       sp = *spp;
 135       if (sp) {
 136          XFree((char *) sp);
 137       }
 138       else {
 139          break;
 140       }
 141    }
 142 }