xorg-server-1.4/hw/xfree86/xf4bpp/emulRepAre.c

   1 /*
   2  * Copyright IBM Corporation 1987,1988,1989
   3  *
   4  * All Rights Reserved
   5  *
   6  * Permission to use, copy, modify, and distribute this software and its
   7  * documentation for any purpose and without fee is hereby granted,
   8  * provided that the above copyright notice appear in all copies and that
   9  * both that copyright notice and this permission notice appear in
  10  * supporting documentation, and that the name of IBM not be
  11  * used in advertising or publicity pertaining to distribution of the
  12  * software without specific, written prior permission.
  13  *
  14  * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  15  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  16  * IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  17  * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  18  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  19  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  20  * SOFTWARE.
  21  *
  22 */
  23
  24 /* ppc Replicate Area -- A Divide & Conquer Algorithm
  25  * a "ppc" Helper Function For Stipples And Tiling
  26  * P. Shupak 1/88
  27  */
  28
  29 #ifdef HAVE_XORG_CONFIG_H
  30 #include <xorg-config.h>
  31 #endif
  32
  33 #include "xf4bpp.h"
  34
  35 void xf4bppReplicateArea( pWin, x, y, planeMask, goalWidth, goalHeight,
  36                         currentHoriz, currentVert)
  37 WindowPtr pWin; /* GJA */
  38 register int x, y, planeMask ;
  39 int goalWidth, goalHeight ;
  40 int currentHoriz, currentVert ;
  41 {
  42         for ( ;
  43               currentHoriz <= ( goalWidth >> 1 ) ;
  44               currentHoriz <<= 1 ) {
  45                 xf4bppBitBlt( pWin, GXcopy, planeMask,
  46                         x, y,
  47                         x + currentHoriz, y,
  48                         currentHoriz, currentVert ) ;
  49         }
  50         if ( goalWidth - currentHoriz )
  51                 xf4bppBitBlt( pWin, GXcopy, planeMask,
  52                         x, y,
  53                         x + currentHoriz, y,
  54                         goalWidth - currentHoriz, currentVert ) ;
  55         for ( ;
  56               currentVert <= ( goalHeight >> 1 ) ;
  57               currentVert <<= 1 ) {
  58                 xf4bppBitBlt( pWin, GXcopy, planeMask,
  59                         x, y,
  60                         x, y + currentVert,
  61                         goalWidth, currentVert ) ;
  62         }
  63         if ( goalHeight - currentVert )
  64                 xf4bppBitBlt( pWin, GXcopy, planeMask,
  65                         x, y,
  66                         x, y + currentVert,
  67                         goalWidth, goalHeight - currentVert ) ;
  68 return ;
  69 }