singlepix.c

/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */

#include "packsingle.h"
#include "indirect.h"
#include "glapi.h"
#include <GL/glxproto.h>

void
__indirect_glGetSeparableFilter(GLenum target, GLenum format, GLenum type,
                                GLvoid * row, GLvoid * column, GLvoid * span)
{
   __GLX_SINGLE_DECLARE_VARIABLES();
   const __GLXattribute *state;
   xGLXGetSeparableFilterReply reply;
   GLubyte *rowBuf, *colBuf;

   if (!dpy)
      return;
   __GLX_SINGLE_LOAD_VARIABLES();
   state = gc->client_state_private;

   /* Send request */
   __GLX_SINGLE_BEGIN(X_GLsop_GetSeparableFilter, __GLX_PAD(13));
   __GLX_SINGLE_PUT_LONG(0, target);
   __GLX_SINGLE_PUT_LONG(4, format);
   __GLX_SINGLE_PUT_LONG(8, type);
   __GLX_SINGLE_PUT_CHAR(12, state->storePack.swapEndian);
   __GLX_SINGLE_READ_XREPLY();
   compsize = reply.length << 2;

   if (compsize != 0) {
      GLint width, height;
      GLint widthsize, heightsize;

      width = reply.width;
      height = reply.height;

      widthsize = __glImageSize(width, 1, 1, format, type, 0);
      heightsize = __glImageSize(height, 1, 1, format, type, 0);

      /* Allocate a holding buffer to transform the data from */
      rowBuf = malloc(widthsize);
      if (!rowBuf) {
         /* Throw data away */
         _XEatData(dpy, compsize);
         __glXSetError(gc, GL_OUT_OF_MEMORY);
         UnlockDisplay(dpy);
         SyncHandle();
         return;
      }
      else {
         __GLX_SINGLE_GET_CHAR_ARRAY(((char *) rowBuf), widthsize);
         __glEmptyImage(gc, 1, width, 1, 1, format, type, rowBuf, row);
         free((char *) rowBuf);
      }
      colBuf = malloc(heightsize);
      if (!colBuf) {
         /* Throw data away */
         _XEatData(dpy, compsize - __GLX_PAD(widthsize));
         __glXSetError(gc, GL_OUT_OF_MEMORY);
         UnlockDisplay(dpy);
         SyncHandle();
         return;
      }
      else {
         __GLX_SINGLE_GET_CHAR_ARRAY(((char *) colBuf), heightsize);
         __glEmptyImage(gc, 1, height, 1, 1, format, type, colBuf, column);
         free((char *) colBuf);
      }
   }
   else {
      /*
       ** don't modify user's buffer.
       */
   }
   __GLX_SINGLE_END();

}