360 lines
8.9 KiB
C
360 lines
8.9 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/offscreen.c,v 1.5 2001/08/01 00:44:56 tsi Exp $ */
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/*
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* Copyright 1993 Gerrit Jan Akkerman
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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 Gerrit Jan Akkerman 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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* GERRIT JAN AKKERMAN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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* IN NO EVENT SHALL GERRIT JAN AKKERMAN BE LIABLE FOR ANY SPECIAL, INDIRECT
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* OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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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: offscreen.c /main/4 1996/02/21 17:56:55 kaleb $ */
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#include "xf4bpp.h"
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#include "vgaVideo.h"
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#include "pixmapstr.h"
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#include "scrnintstr.h"
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#include "windowstr.h"
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#define saved_screen(pWin) \
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((unsigned char *)(((PixmapPtr)((pWin)->drawable.pScreen->devPrivate))->devPrivate.ptr))
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#define SAVEDSCREEN(pWin, x, y) \
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(*(saved_screen(pWin) + (y) * (BYTES_PER_LINE(pWin)) + (x)))
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#define DO_ROP(src,dst,alu,planes) \
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((dst) = do_rop((src),(dst),(alu),(planes)))
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/* NOTE:
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* The following to functions don't do anything. They're just there to
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* provide a stable interface to the rest of the system.
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*/
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static int
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do_rop
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(
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int src,
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int dst,
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int alu,
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const unsigned long planes
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)
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{
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int _dst; /* New dst */
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switch ( alu ) {
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case GXclear: /* 0x0 Zero 0 */
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_dst = 0; break ;
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case GXinvert: /* 0xa NOT dst */
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_dst = ~dst; break ;
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case GXset: /* 0xf 1 */
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_dst = src; break ;
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default:
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case GXnoop: /* 0x5 dst */
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return dst;
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case GXnor: /* 0x8 NOT src AND NOT dst */
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_dst = ~src & ~dst; break ;
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case GXandInverted: /* 0x4 NOT src AND dst */
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_dst = ~src & dst; break ;
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case GXand: /* 0x1 src AND dst */
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_dst = src & dst; break ;
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case GXequiv: /* 0x9 NOT src XOR dst */
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_dst = ~src ^ dst; break ;
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case GXxor: /* 0x6 src XOR dst */
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_dst = src ^ dst; break ;
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case GXandReverse: /* 0x2 src AND NOT dst */
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_dst = src & ~dst; break ;
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case GXnand: /* 0xe NOT src OR NOT dst */
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_dst = ~src | ~dst; break ;
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case GXorReverse: /* 0xb src OR NOT dst */
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_dst = src | ~dst; break ;
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case GXorInverted: /* 0xd NOT src OR dst */
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_dst = ~src | dst; break ;
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case GXor: /* 0x7 src OR dst */
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_dst = src | dst; break ;
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case GXcopyInverted: /* 0xc NOT src */
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_dst = ~src; break ;
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case GXcopy: /* 0x3 src */
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_dst = src; break ;
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}
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return (dst & ~planes) | (_dst & planes);
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}
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/* File vgaBitBlt.c */
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void
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xf4bppOffBitBlt( pWin, alu, writeplanes, x0, y0, x1, y1, w, h )
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WindowPtr pWin; /* GJA */
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const int alu, writeplanes ;
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register int x0 ;
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int y0 ;
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register int x1 ;
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int y1 ;
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register int w, h ;
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{
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int x,y;
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switch ( alu ) {
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case GXclear: /* 0x0 Zero 0 */
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case GXinvert: /* 0xa NOT dst */
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case GXset: /* 0xf 1 */
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xf4bppOffFillSolid( pWin, VGA_ALLPLANES, alu, writeplanes,
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x0, y0, w, h ) ;
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case GXnoop: /* 0x5 dst */
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return ;
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default:
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break ;
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}
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if ( (w <= 0) || (h <= 0) ) return;
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for ( y = 0 ; y < h ; y++ ) {
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for ( x = 0 ; x < w ; x++ ) {
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DO_ROP(SAVEDSCREEN(pWin,x0+x,y0+y),SAVEDSCREEN(pWin,x1+x,y1+y),
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alu,writeplanes);
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}
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}
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}
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/* for file vgaImages.c */
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void
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xf4bppOffDrawColorImage( pWin, x, y, w, h, data, RowIncrement, alu, planes )
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WindowPtr pWin; /* GJA */
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int x, y ;
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register int w, h ;
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unsigned char *data ;
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register int RowIncrement ;
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const int alu ;
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const unsigned long int planes ;
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{
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int dx,dy;
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for ( dy = 0 ; dy < h ; dy++ ) {
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for ( dx = 0 ; dx < w ; dx++ ) {
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DO_ROP( data[dy * RowIncrement + dx],
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SAVEDSCREEN(pWin,x+dx,y+dy), alu, planes);
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}
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}
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}
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void
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xf4bppOffReadColorImage( pWin, x, y, lx, ly, data, RowIncrement )
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WindowPtr pWin; /* GJA */
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int x, y ;
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int lx, ly ;
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unsigned char *data ;
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int RowIncrement ;
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{
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int dx, dy;
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if ( ( lx <= 0 ) || ( ly <= 0 ) )
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return ;
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for ( dy = 0 ; dy < ly ; dy++ ) {
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for ( dx = 0 ; dx < lx ; dx++ ) {
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data[dy*RowIncrement+dx] = SAVEDSCREEN(pWin,x+dx,y+dy);
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}
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}
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}
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/* For file vgaSolid.c */
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void xf4bppOffFillSolid( pWin, color, alu, planes, x0, y0, lx, ly )
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WindowPtr pWin; /* GJA */
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unsigned long int color ;
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const int alu ;
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unsigned long int planes ;
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register int x0 ;
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register const int y0 ;
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register int lx ;
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register const int ly ; /* MUST BE > 0 !! */
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{
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int dx, dy;
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if ( ( lx == 0 ) || ( ly == 0 ) )
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return;
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for ( dy = 0 ; dy < ly ; dy++ ) {
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for ( dx = 0 ; dx < lx ; dx++ ) {
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DO_ROP(color,SAVEDSCREEN(pWin, x0+dx,y0+dy),alu,planes);
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}
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}
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}
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/* For file vgaStipple.c */
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/* GJA -- modified this to take both Width and Height, and to
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* reduce x and y to Width and Height by taking remainders.
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*/
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static unsigned char
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xygetbits
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(
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register int x,
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register int y,
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register const unsigned int Width,
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register const unsigned int paddedByteWidth,
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register const unsigned int Height,
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register const unsigned char * const data
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)
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{
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register unsigned char bits ;
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unsigned const char *lineptr, *cptr ;
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register int shift ;
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register int wrap ;
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x = x % Width;
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y = y % Height;
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lineptr = data + (y * paddedByteWidth);
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cptr = lineptr + (x >> 3) ;
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bits = *cptr ;
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if ((shift = x & 7))
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bits = SCRLEFT8( bits, shift ) |
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SCRRIGHT8( cptr[1], ( 8 - shift ) ) ;
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if ( ( wrap = x + 8 - Width ) > 0 ) {
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bits &= SCRLEFT8( 0xFF, wrap ) ;
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bits |= SCRRIGHT8( *lineptr, ( 8 - wrap ) ) ;
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}
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return bits ;
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}
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static void
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DoMono
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(
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WindowPtr pWin, /* GJA */
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int w,
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int x,
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int y,
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register const unsigned char *mastersrc,
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int h,
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unsigned int width,
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register unsigned int paddedByteWidth,
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unsigned int height,
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int xshift,
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int yshift,
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int alu,
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int planes,
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int fg
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)
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{
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int dy, dx, i;
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int byte;
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for ( dy = 0 ; dy < h ; dy++ ) {
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for ( dx = 0; dx <= w - 8 ; dx += 8 ) {
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/* get next byte */
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byte = xygetbits(dx+xshift,dy+yshift,width,
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paddedByteWidth, height, mastersrc);
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for ( i = 0 ; i < 8 ; i++ ) {
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if ( byte & (128 >> i) ) {
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DO_ROP(fg,SAVEDSCREEN(pWin,x+dx+i,y+dy),
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alu,planes);
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}
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}
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}
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/* get last bits */
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byte = xygetbits(dx+xshift,dy+yshift,width,
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paddedByteWidth, height, mastersrc);
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for ( i = 0 ; i < (w - dx) ; i++ ) {
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if ( byte & (128 >> i) ) {
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DO_ROP(fg,SAVEDSCREEN(pWin,x+dx+i,y+dy),
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alu,planes);
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}
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}
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}
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}
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void
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xf4bppOffDrawMonoImage( pWin, data, x, y, w, h, fg, alu, planes )
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WindowPtr pWin; /* GJA */
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unsigned char *data;
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int x, y, w, h ;
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unsigned long int fg ;
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int alu ;
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unsigned long int planes;
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{
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if ( ( alu == GXnoop ) || !( planes &= VGA_ALLPLANES ) )
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return ;
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DoMono( pWin, w, x, y, (const unsigned char *) data, h,
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w, ( ( w + 31 ) & ~31 ) >> 3, h, 0, 0, alu,
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(int)planes, (int)fg) ;
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}
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void
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xf4bppOffFillStipple( pWin, pStipple, fg, alu, planes, x, y, w, h, xSrc, ySrc )
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WindowPtr pWin; /* GJA */
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register PixmapPtr const pStipple ;
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unsigned long int fg ;
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const int alu ;
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unsigned long int planes ;
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int x, y, w, h ;
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const int xSrc, ySrc ;
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{
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unsigned int width ;
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unsigned int height ;
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int xshift ;
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int yshift ;
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if ( ( alu == GXnoop ) || !( planes &= VGA_ALLPLANES ) )
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return ;
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/* Figure Bit Offsets & Source Address */
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width = pStipple->drawable.width ;
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if ( ( xshift = ( x - xSrc ) ) < 0 )
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xshift = width - ( ( - xshift ) % width ) ;
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else
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xshift %= width ;
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height = pStipple->drawable.height ;
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if ( ( yshift = ( y - ySrc ) ) < 0 )
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yshift = height - ( ( - yshift ) % height ) ;
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else
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yshift %= height ;
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DoMono( pWin, w, x, y,
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(const unsigned char *) pStipple->devPrivate.ptr,
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h,
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width,
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( ( width + 31 ) & (unsigned)(~31) ) >> 3,
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height,
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xshift, yshift,
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alu, (int)planes, (int)fg ) ;
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return ;
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}
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