1 /**
2 ** bitblt1b.c ---- bitblt from a 1bpp context
3 **
4 ** Copyright (c) 2001 Josu Onandia
5 ** [e-mail: jonandia@fagorautomation.es].
6 **
7 ** This file is part of the GRX graphics library.
8 **
9 ** The GRX graphics library is free software; you can redistribute it
10 ** and/or modify it under some conditions; see the "copying.grx" file
11 ** for details.
12 **
13 ** This library is distributed in the hope that it will be useful,
14 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 **
17 **/
18
19 #include "libgrx.h"
20 #include "clipping.h"
21
GrBitBlt1bpp(GrContext * dst,int dx,int dy,GrContext * src,int x1,int y1,int x2,int y2,GrColor fg,GrColor bg)22 void GrBitBlt1bpp(GrContext *dst,int dx,int dy,
23 GrContext *src,int x1,int y1,int x2,int y2,
24 GrColor fg, GrColor bg)
25 {
26 int oldx1,oldy1;
27 int oldx2,oldy2;
28 int dstx2,dsty2;
29
30 if(dst == NULL) dst = CURC;
31 if(src == NULL) src = CURC;
32
33 if(src->gc_driver->num_planes != 1 || src->gc_driver->bits_per_pixel != 1)
34 return;
35
36 isort(x1,x2); oldx1 = x1;
37 isort(y1,y2); oldy1 = y1;
38 cxclip_ordbox(src,x1,y1,x2,y2);
39 oldx1 = (dx += (x1 - oldx1));
40 oldy1 = (dy += (y1 - oldy1));
41 oldx2 = dstx2 = dx + x2 - x1;
42 oldy2 = dsty2 = dy + y2 - y1;
43 clip_ordbox(dst,dx,dy,dstx2,dsty2);
44 x1 += (dx - oldx1);
45 y1 += (dy - oldy1);
46 x2 -= (oldx2 - dstx2);
47 y2 -= (oldy2 - dsty2);
48 mouse_block(src,x1,y1,x2,y2);
49 mouse_addblock(dst,dx,dy,dstx2,dsty2);
50
51 (dst->gc_driver->drawbitmap)((dx + dst->gc_xoffset),(dy + dst->gc_yoffset),
52 (x2 - x1 + 1),(y2 - y1 + 1),src->gc_baseaddr[0],src->gc_lineoffset,
53 /*alex:the offset should anyway be the x1,y1 point in src, as clipped*/
54 (x1 + (y1 * (src->gc_lineoffset << 3))),fg,bg);
55
56 mouse_unblock();
57 }
58
59