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- /**
- ** P4FILLP.C
- **
- ** Copyright (C) 1992, Csaba Biegl
- ** 820 Stirrup Dr, Nashville, TN, 37221
- ** csaba@vuse.vanderbilt.edu
- **
- ** This file is distributed under the terms listed in the document
- ** "copying.cb", available from the author at the address above.
- ** A copy of "copying.cb" should accompany this file; if not, a copy
- ** should be available from where this file was obtained. This file
- ** may not be distributed without a verbatim copy of "copying.cb".
- ** You should also have received a copy of the GNU General Public
- ** License along with this program (it is in the file "copying");
- ** if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- ** Cambridge, MA 02139, USA.
- **
- ** This program is distributed in the hope that it will be useful,
- ** but WITHOUT ANY WARRANTY; without even the implied warranty of
- ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ** GNU General Public License for more details.
- **/
-
- #include "p4.h"
- #include "memfill.h"
- #include "memcopy.h"
-
- void _GrP4FillPattern(int x,int y,int width,GrPattern *p)
- {
- if(width <= 0) return;
- x += CURC->gc_xoffset;
- y += CURC->gc_yoffset;
- if(p->gp_ispixmap) {
- GrContext *dst = (CURC->gc_root == NULL) ? CURC : CURC->gc_root;
- GrContext *src = (GrContext *)(&p->gp_pxp_source);
- int pattwdt = p->gp_pxp_width;
- int optype = p->gp_pxp_oper;
- int cpysize = x % pattwdt;
- long dstaddr = PIX_ADDR(dst,x,y);
- long srcline = PIX_ADDR(src,0,(y % p->gp_pxp_height));
- long srcaddr = srcline + cpysize;
-
- cpysize = pattwdt - cpysize;
- while(width > 0) {
- if(cpysize > width) cpysize = width;
- _GrP4PixCopy(dst,dstaddr,src,srcaddr,cpysize,1,optype);
- width -= cpysize;
- dstaddr += cpysize;
- srcaddr = srcline;
- cpysize = pattwdt;
- }
- }
- else {
- pixptr ptr = (pixptr)
- (CURC->gc_baseaddr + (y * CURC->gc_lineoffset) + (x >> 3));
- int bits = p->gp_bmp_data[y % p->gp_bmp_height];
- int fgc = p->gp_bmp_fgcolor;
- int bgc = p->gp_bmp_bgcolor;
- int fgop = C_OPER(fgc);
- int bgop = C_OPER(bgc);
- int dofg = _GrP4DrawTable[fgop] ^ (fgc &= C_SIGNIF);
- int dobg = _GrP4DrawTable[bgop] ^ (bgc &= C_SIGNIF);
- int plane,lmask,rmask;
-
- _ClrDir();
- _ComputeMasks(x,width,lmask,rmask);
- for(x = 2; --x >= 0; fgc = bgc,fgop = bgop,dofg = dobg,bits = ~bits) {
- pixptr p = ptr;
- if(!dofg) continue;
- if(CURC->gc_onscreen) {
- _SetVideoColor(fgc,fgop);
- if(lmask) { _SetVGAWriteMask(lmask & bits); (*p)++; p++; }
- if(width) {
- _SetVGAWriteMask(bits);
- _SaveDS();
- _RowCpyB(VRAM,p,p,width);
- _RestoreDS();
- p += width;
- }
- if(rmask) { _SetVGAWriteMask(rmask & bits); (*p)++; }
- continue;
- }
- fgop <<= 1;
- for(plane = 4; --plane >= 0; fgc >>= 1) {
- pixptr pp = p;
- switch(fgop | (fgc & 1)) {
- case C_XOR2+1:
- if(lmask) *pp++ ^= (lmask & bits);
- if(width) {
- _RowSetXorB(MEM_X,pp,bits,width);
- pp += width;
- }
- if(rmask) *pp ^= (rmask & bits);
- break;
- case C_OR2+1:
- case C_SET2+1:
- if(lmask) *pp++ |= (lmask & bits);
- if(width) {
- _RowSetOrB(MEM_1,pp,bits,width);
- pp += width;
- }
- if(rmask) *pp |= (rmask & bits);
- break;
- case C_AND2+0:
- case C_SET2+0:
- if(lmask) *pp++ &= ~(lmask & bits);
- if(width) {
- _RowSetAndB(MEM_0,pp,~bits,width);
- pp += width;
- }
- if(rmask) *pp &= ~(rmask & bits);
- break;
- }
- p = (pixptr)((long)p + CURC->gc_planeoffset);
- }
- }
- }
- }
-