struct mchar;
struct LayFuncs
{
void (*lf_LayProcess) __P((char **, int *));
void (*lf_LayAbort) __P((void));
void (*lf_LayRedisplayLine) __P((int, int, int, int));
void (*lf_LayClearLine) __P((int, int, int, int));
int (*lf_LayRewrite) __P((int, int, int, struct mchar *, int));
int (*lf_LayResize) __P((int, int));
void (*lf_LayRestore) __P((void));
};
struct layer
{
struct canvas *l_cvlist;
int l_width;
int l_height;
int l_x;
int l_y;
int l_encoding;
struct LayFuncs *l_layfn;
char *l_data;
struct layer *l_next;
struct layer *l_bottom;
int l_blocking;
};
#define LayProcess (*flayer->l_layfn->lf_LayProcess)
#define LayAbort (*flayer->l_layfn->lf_LayAbort)
#define LayRedisplayLine (*flayer->l_layfn->lf_LayRedisplayLine)
#define LayClearLine (*flayer->l_layfn->lf_LayClearLine)
#define LayRewrite (*flayer->l_layfn->lf_LayRewrite)
#define LayResize (*flayer->l_layfn->lf_LayResize)
#define LayRestore (*flayer->l_layfn->lf_LayRestore)
#define LaySetCursor() LGotoPos(flayer, flayer->l_x, flayer->l_y)
#define LayCanResize(l) (l->l_layfn->LayResize != DefResize)
#define LAY_CALL_UP(fn) do \
{ \
struct layer *oldlay = flayer; \
struct canvas *oldcvlist, *cv; \
debug("LayCallUp\n"); \
flayer = flayer->l_next; \
oldcvlist = flayer->l_cvlist; \
debug1("oldcvlist: %x\n", oldcvlist); \
flayer->l_cvlist = oldlay->l_cvlist; \
for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext) \
cv->c_layer = flayer; \
fn; \
flayer = oldlay; \
for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext) \
cv->c_layer = flayer; \
flayer->l_next->l_cvlist = oldcvlist; \
} while(0)
#define LAY_DISPLAYS(l, fn) do \
{ \
struct display *olddisplay = display; \
struct canvas *cv; \
for (display = displays; display; display = display->d_next) \
{ \
for (cv = D_cvlist; cv; cv = cv->c_next) \
if (cv->c_layer == l) \
break; \
if (cv == 0) \
continue; \
fn; \
} \
display = olddisplay; \
} while(0)