diff options
Diffstat (limited to 'src/libmemlayer/lhide.c')
-rw-r--r-- | src/libmemlayer/lhide.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/libmemlayer/lhide.c b/src/libmemlayer/lhide.c new file mode 100644 index 00000000..d6aaa55f --- /dev/null +++ b/src/libmemlayer/lhide.c @@ -0,0 +1,67 @@ +#include <u.h> +#include <libc.h> +#include <draw.h> +#include <memdraw.h> +#include <memlayer.h> + +/* + * Hide puts that portion of screenr now on the screen into the window's save area. + * Expose puts that portion of screenr now in the save area onto the screen. + * + * Hide and Expose both require that the layer structures in the screen + * match the geometry they are being asked to update, that is, they update the + * save area (hide) or screen (expose) based on what those structures tell them. + * This means they must be called at the correct time during window shuffles. + */ + +static +void +lhideop(Memimage *src, Rectangle screenr, Rectangle clipr, void *etc, int insave) +{ + Rectangle r; + Memlayer *l; + + USED(clipr.min.x); + USED(insave); + l = etc; + if(src != l->save){ /* do nothing if src is already in save area */ + r = rectsubpt(screenr, l->delta); + memdraw(l->save, r, src, screenr.min, nil, screenr.min, S); + } +} + +void +memlhide(Memimage *i, Rectangle screenr) +{ + if(i->layer->save == nil) + return; + if(rectclip(&screenr, i->layer->screen->image->r) == 0) + return; + _memlayerop(lhideop, i, screenr, screenr, i->layer); +} + +static +void +lexposeop(Memimage *dst, Rectangle screenr, Rectangle clipr, void *etc, int insave) +{ + Memlayer *l; + Rectangle r; + + USED(clipr.min.x); + if(insave) /* if dst is save area, don't bother */ + return; + l = etc; + r = rectsubpt(screenr, l->delta); + if(l->save) + memdraw(dst, screenr, l->save, r.min, nil, r.min, S); + else + l->refreshfn(dst, r, l->refreshptr); +} + +void +memlexpose(Memimage *i, Rectangle screenr) +{ + if(rectclip(&screenr, i->layer->screen->image->r) == 0) + return; + _memlayerop(lexposeop, i, screenr, screenr, i->layer); +} |