119 lines
4.0 KiB
C
119 lines
4.0 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/ppcImg.c,v 1.4tsi Exp $ */
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/*
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* Copyright IBM Corporation 1987,1988,1989
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*
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of IBM not be
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* used in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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*
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* IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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* IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*
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*/
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/* $XConsortium: ppcImg.c /main/4 1996/02/21 17:57:53 kaleb $ */
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#include "xf4bpp.h"
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#include "OScompiler.h"
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#include "mi.h"
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#include "scrnintstr.h"
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#include "servermd.h"
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/* Was MIGETIMAGE -- public entry for the GetImage Request
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* We're getting the image into a memory buffer. While we have to use GetSpans
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* to read a line from the device ( since we don't know what that looks like ) ,
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* we can just write into the destination buffer
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*
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* two different strategies are used, depending on whether we're getting the
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* image in Z format or XY format
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* Z format:
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* Line at a time, GetSpans a line and bcopy it to the destination
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* buffer, except that if the planemask is not all ones, we create a
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* temporary pixmap and do a SetSpans into it ( to get bits turned off )
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* and then another GetSpans to get stuff back ( because pixmaps are
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* opaque, and we are passed in the memory to write into ) . This is
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* completely ugly and slow but works, but the interfaces just aren't
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* designed for this case. Life is hard.
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* XY format:
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* get the single plane specified in planemask
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*/
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void
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xf4bppGetImage( pDraw, sx, sy, w, h, format, planeMask, pdstLine )
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DrawablePtr pDraw ;
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int sx, sy, w, h ;
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unsigned int format ;
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unsigned long planeMask ;
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char * pdstLine ;
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{
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#if 1
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int depth, i, linelength, width ;
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DDXPointRec pt ;
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char *pbits ;
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XID gcv[2] ;
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PixmapPtr pPixmap = (PixmapPtr) NULL ;
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GCPtr pGC ;
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char *pDst = pdstLine ;
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depth = pDraw->depth ;
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if ( format == ZPixmap ) {
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linelength = PixmapBytePad( w, depth ) ;
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/* if ( pDraw->type == DRAWABLE_WINDOW ) { */
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sx += pDraw->x ;
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sy += pDraw->y ;
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/* } */
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if ( ( ( ( 1 << pDraw->depth ) - 1 ) & planeMask )
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!= (unsigned)( 1 << pDraw->depth ) - 1 ) {
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pGC = GetScratchGC( depth, pDraw->pScreen ) ;
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pPixmap = (PixmapPtr)
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(* pDraw->pScreen->CreatePixmap)( pDraw->pScreen, w, h, depth ) ;
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gcv[0] = GXcopy ;
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gcv[1] = planeMask ;
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DoChangeGC( pGC, GCPlaneMask | GCFunction, gcv, 0 ) ;
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ValidateGC( (DrawablePtr)pPixmap, pGC ) ;
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pbits = (char *)ALLOCATE_LOCAL(w);
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for ( i = 0 ; i < h ; i++ ) {
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pt.x = sx ;
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pt.y = sy + i ;
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width = w ;
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(* pDraw->pScreen->GetSpans)( pDraw, w, &pt, &width, 1, pbits ) ;
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pt.x = 0 ;
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pt.y = i ;
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width = w ;
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if ( planeMask & ((1 << depth) - 1) ) /* GJA -- mfb bug */
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(* pGC->ops->SetSpans)( (DrawablePtr)pPixmap, pGC, pbits, &pt, &width, 1, TRUE ) ;
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(* pDraw->pScreen->GetSpans)( (DrawablePtr)pPixmap, w, &pt, &width, 1, pDst ) ;
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pDst += linelength ;
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}
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DEALLOCATE_LOCAL(pbits) ;
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(* pGC->pScreen->DestroyPixmap)( pPixmap ) ;
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FreeScratchGC( pGC ) ;
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return ;
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}
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for ( i = 0 ; i < h ; i++ ) {
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pt.x = sx ;
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pt.y = sy + i ;
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width = w ;
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(* pDraw->pScreen->GetSpans)( pDraw, w, &pt, &width, 1, pDst ) ;
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pDst += linelength ;
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}
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}
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else
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#endif
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miGetImage( pDraw, sx, sy, w, h, format, planeMask, pdstLine ) ;
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}
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