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legacy-imlib2
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more wokr on updates 

SVN revision: 306
This commit is contained in:
Carsten Haitzler 1999-09-17 01:47:49 +00:00
parent 12b81e1dde
commit 4e84cb2b4f
1 changed files with 52 additions and 4 deletions
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56
updates.c
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@ -6,7 +6,8 @@ enum _t_used
T_UNUSED = 0,
T_USED = 1,
T_SPAN_H = 2,
T_SPAN_V = 4
T_SPAN_V = 4,
T_DONE = 8
};
struct _tile
@ -32,9 +33,12 @@ __imlib_MergeUpdate(ImlibUpdate *u, int w, int h)
{
ImlibUpdate *nu = NULL, *uu;
struct _tile *t;
int tw, th, x, y, i;
/* if theres only one rect - retunr it - no point cleaning up 1 rect */
int tw, th, x, y, i, r1, r2;
/* if theres no rects to process.. return NULL */
if (!u)
return NULL;
/* if theres only one rect - return it - no point cleaning up 1 rect */
if (!u->next)
return u;
tw = w >> TB;
@ -84,8 +88,52 @@ __imlib_MergeUpdate(ImlibUpdate *u, int w, int h)
}
}
/* concatinate tiles horizontally */
for (y = 0; y < th; y++)
{
for (x = 0; x < tw - 1; x++)
{
if ((T(x, y).max_x == TM) && (T(x + 1, y).min_x == 0) &&
(T(x, y).min_y == T(x + 1, y).min_y) &&
(T(x, y).max_y == T(x + 1, y).max_y))
T(x, y).used |= T_SPAN_H;
}
}
/* concatinate tiles vertically */
for (y = 0; y < th - 1; y++)
{
for (x = 0; x < tw; x++)
{
if ((T(x, y).max_y == TM) && (T(x, y + 1).min_y == 0) &&
(T(x, y).min_x == T(x, y + 1).min_x) &&
(T(x, y).max_x == T(x, y + 1).max_x))
T(x, y).used |= T_SPAN_V;
}
}
/* generate new rect list from tiles */
for (y = 0; y < th; y++)
{
for (x = 0; x < tw; x++)
{
if (!(T(x, y).used & (T_SPAN_H | T_SPAN_V)))
nu = __imlib_AddUpdate(nu,
(x << TB) + T(x, y).min_x,
(y << TB) + T(x, y).min_y,
(T(x, y).max_x - T(x, y).min_x) + 1,
(T(x, y).max_y - T(x, y).min_y) + 1);
/* keep going here */
}
}
free(t);
/* count up our "update rects" */
for (r1 = 0, uu = u; uu; uu = uu->next, r1++);
for (r2 = 0, uu = nu; uu; uu = uu->next, r2++);
/* if our original rect list is smaller r the same size as the new rect */
/* list then just use the original rect list */
if (r1 <= r2)
{
__imlib_FreeUpdates(nu);
return u;
}
__imlib_FreeUpdates(u);
return nu;
}