src/glx/x11/singlepix.c

   1 /* $XFree86: xc/lib/GL/glx/singlepix.c,v 1.3 2001/03/21 16:04:39 dawes Exp $ */
   2 /*
   3 ** License Applicability. Except to the extent portions of this file are
   4 ** made subject to an alternative license as permitted in the SGI Free
   5 ** Software License B, Version 1.1 (the "License"), the contents of this
   6 ** file are subject only to the provisions of the License. You may not use
   7 ** this file except in compliance with the License. You may obtain a copy
   8 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   9 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  10 **
  11 ** http://oss.sgi.com/projects/FreeB
  12 **
  13 ** Note that, as provided in the License, the Software is distributed on an
  14 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  15 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  16 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  17 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  18 **
  19 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  20 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  21 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  22 ** Copyright in any portions created by third parties is as indicated
  23 ** elsewhere herein. All Rights Reserved.
  24 **
  25 ** Additional Notice Provisions: The application programming interfaces
  26 ** established by SGI in conjunction with the Original Code are The
  27 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  28 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  29 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  30 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  31 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  32 ** published by SGI, but has not been independently verified as being
  33 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  34 **
  35 */
  36
  37 #include "packsingle.h"
  38 #include "indirect.h"
  39
  40 void __indirect_glGetSeparableFilter(GLenum target, GLenum format, GLenum type,
  41                           GLvoid *row, GLvoid *column, GLvoid *span)
  42 {
  43     __GLX_SINGLE_DECLARE_VARIABLES();
  44     const __GLXattribute * state;
  45     xGLXGetSeparableFilterReply reply;
  46     GLubyte *rowBuf, *colBuf;
  47
  48     if (!dpy) return;
  49     __GLX_SINGLE_LOAD_VARIABLES();
  50     state = gc->client_state_private;
  51
  52     /* Send request */
  53     __GLX_SINGLE_BEGIN(X_GLsop_GetSeparableFilter, __GLX_PAD(13));
  54     __GLX_SINGLE_PUT_LONG(0,target);
  55     __GLX_SINGLE_PUT_LONG(4,format);
  56     __GLX_SINGLE_PUT_LONG(8,type);
  57     __GLX_SINGLE_PUT_CHAR(12,state->storePack.swapEndian);
  58     __GLX_SINGLE_READ_XREPLY();
  59     compsize = reply.length << 2;
  60
  61     if (compsize != 0) {
  62         GLint width, height;
  63         GLint widthsize, heightsize;
  64
  65         width = reply.width;
  66         height = reply.height;
  67
  68         widthsize = __glImageSize(width,1,1,format, type, 0);
  69         heightsize = __glImageSize(height,1,1,format, type, 0);
  70
  71         /* Allocate a holding buffer to transform the data from */
  72         rowBuf = (GLubyte*) Xmalloc(widthsize);
  73         if (!rowBuf) {
  74             /* Throw data away */
  75             _XEatData(dpy, compsize);
  76             __glXSetError(gc, GL_OUT_OF_MEMORY);
  77             UnlockDisplay(dpy);
  78             SyncHandle();
  79             return;
  80         } else {
  81             __GLX_SINGLE_GET_CHAR_ARRAY(((char*)rowBuf),widthsize);
  82             __glEmptyImage(gc, 1, width, 1, 1, format, type, rowBuf, row);
  83             Xfree((char*) rowBuf);
  84         }
  85         colBuf = (GLubyte*) Xmalloc(heightsize);
  86         if (!colBuf) {
  87             /* Throw data away */
  88             _XEatData(dpy, compsize - __GLX_PAD(widthsize));
  89             __glXSetError(gc, GL_OUT_OF_MEMORY);
  90             UnlockDisplay(dpy);
  91             SyncHandle();
  92             return;
  93         } else {
  94             __GLX_SINGLE_GET_CHAR_ARRAY(((char*)colBuf),heightsize);
  95             __glEmptyImage(gc, 1, height, 1, 1, format, type, colBuf, column);
  96             Xfree((char*) colBuf);
  97         }
  98     } else {
  99         /*
 100         ** don't modify user's buffer.
 101         */
 102     }
 103     __GLX_SINGLE_END();
 104
 105 }