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#include <libc.h>
#include <libg.h>
#include "libgint.h"
/*
* m should be a 1-bit-deep bitmap with origin (0,0) and the
* same extents as r. s should have the same depth as d.
* Rectangle r of s is copied to d wherever corresponding
* bits of m are 1
*/
void
copymasked(Bitmap *d, Point p, Bitmap *s, Bitmap *m, Rectangle r)
{
int sx, sy, dx, dy;
XGCValues gcv;
GC g;
if(Dx(r)<=0 || Dy(r)<=0)
return;
sx = r.min.x;
sy = r.min.y;
if(s->flag&SHIFT){
sx -= s->r.min.x;
sy -= s->r.min.y;
}
dx = p.x;
dy = p.y;
if(d->flag&SHIFT){
dx -= d->r.min.x;
dy -= d->r.min.y;
}
gcv.fill_style = FillStippled;
gcv.stipple = (Pixmap)m->id;
gcv.function = GXclear;
gcv.ts_x_origin = dx;
gcv.ts_y_origin = dy;
gcv.fill_style = FillStippled;
g = _getgc(d, GCFunction|GCStipple|GCTileStipXOrigin
|GCTileStipYOrigin|GCFillStyle, &gcv);
XFillRectangle(_dpy, (Drawable)d->id, g,
dx, dy, Dx(r), Dy(r));
gcv.function = GXor;
gcv.fill_style = FillSolid;
g = _getgc(d, GCFunction|GCFillStyle, &gcv);
XCopyArea(_dpy, (Drawable)s->id, (Drawable)d->id, g,
sx, sy, Dx(r), Dy(r), dx, dy);
}
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