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 #ifndef GLX_USE_APPLEGL
  39 static void
  40 do_enable_disable(GLenum array, GLboolean val)
  41 {
  42    struct glx_context *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    struct glx_context *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 = malloc(sizeof(__GLXattribute));
  79          if (sp == NULL) {
  80             __glXSetError(gc, GL_OUT_OF_MEMORY);
  81             return;
  82          }
  83          *spp = sp;
  84       }
  85       sp->mask = mask;
  86       gc->attributes.stackPointer = spp + 1;
  87       if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
  88          sp->storePack = state->storePack;
  89          sp->storeUnpack = state->storeUnpack;
  90       }
  91       if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
  92          __glXPushArrayState(state);
  93       }
  94    }
  95    else {
  96       __glXSetError(gc, GL_STACK_OVERFLOW);
  97       return;
  98    }
  99 }
 100
 101 void
 102 __indirect_glPopClientAttrib(void)
 103 {
 104    struct glx_context *gc = __glXGetCurrentContext();
 105    __GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
 106    __GLXattribute **spp = gc->attributes.stackPointer, *sp;
 107    GLuint mask;
 108
 109    if (spp > &gc->attributes.stack[0]) {
 110       --spp;
 111       sp = *spp;
 112       assert(sp != 0);
 113       mask = sp->mask;
 114       gc->attributes.stackPointer = spp;
 115
 116       if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
 117          state->storePack = sp->storePack;
 118          state->storeUnpack = sp->storeUnpack;
 119       }
 120       if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
 121          __glXPopArrayState(state);
 122       }
 123
 124       sp->mask = 0;
 125    }
 126    else {
 127       __glXSetError(gc, GL_STACK_UNDERFLOW);
 128       return;
 129    }
 130 }
 131 #endif
 132
 133 void
 134 __glFreeAttributeState(struct glx_context * gc)
 135 {
 136    __GLXattribute *sp, **spp;
 137
 138    for (spp = &gc->attributes.stack[0];
 139         spp < &gc->attributes.stack[__GL_CLIENT_ATTRIB_STACK_DEPTH]; spp++) {
 140       sp = *spp;
 141       if (sp) {
 142          free((char *) sp);
 143       }
 144       else {
 145          break;
 146       }
 147    }
 148 }