forked from old/legacy-imlib2
parent
12b81e1dde
commit
4e84cb2b4f
54
updates.c
54
updates.c
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@ -6,7 +6,8 @@ enum _t_used
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T_UNUSED = 0,
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T_USED = 1,
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T_SPAN_H = 2,
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T_SPAN_V = 4
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T_SPAN_V = 4,
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T_DONE = 8
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};
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struct _tile
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@ -32,9 +33,12 @@ __imlib_MergeUpdate(ImlibUpdate *u, int w, int h)
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{
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ImlibUpdate *nu = NULL, *uu;
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struct _tile *t;
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int tw, th, x, y, i;
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int tw, th, x, y, i, r1, r2;
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/* if theres only one rect - retunr it - no point cleaning up 1 rect */
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/* if theres no rects to process.. return NULL */
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if (!u)
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return NULL;
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/* if theres only one rect - return it - no point cleaning up 1 rect */
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if (!u->next)
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return u;
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tw = w >> TB;
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@ -84,8 +88,52 @@ __imlib_MergeUpdate(ImlibUpdate *u, int w, int h)
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}
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}
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/* concatinate tiles horizontally */
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for (y = 0; y < th; y++)
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{
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for (x = 0; x < tw - 1; x++)
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{
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if ((T(x, y).max_x == TM) && (T(x + 1, y).min_x == 0) &&
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(T(x, y).min_y == T(x + 1, y).min_y) &&
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(T(x, y).max_y == T(x + 1, y).max_y))
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T(x, y).used |= T_SPAN_H;
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}
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}
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/* concatinate tiles vertically */
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for (y = 0; y < th - 1; y++)
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{
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for (x = 0; x < tw; x++)
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{
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if ((T(x, y).max_y == TM) && (T(x, y + 1).min_y == 0) &&
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(T(x, y).min_x == T(x, y + 1).min_x) &&
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(T(x, y).max_x == T(x, y + 1).max_x))
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T(x, y).used |= T_SPAN_V;
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}
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}
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/* generate new rect list from tiles */
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for (y = 0; y < th; y++)
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{
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for (x = 0; x < tw; x++)
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{
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if (!(T(x, y).used & (T_SPAN_H | T_SPAN_V)))
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nu = __imlib_AddUpdate(nu,
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(x << TB) + T(x, y).min_x,
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(y << TB) + T(x, y).min_y,
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(T(x, y).max_x - T(x, y).min_x) + 1,
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(T(x, y).max_y - T(x, y).min_y) + 1);
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/* keep going here */
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}
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}
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free(t);
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/* count up our "update rects" */
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for (r1 = 0, uu = u; uu; uu = uu->next, r1++);
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for (r2 = 0, uu = nu; uu; uu = uu->next, r2++);
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/* if our original rect list is smaller r the same size as the new rect */
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/* list then just use the original rect list */
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if (r1 <= r2)
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{
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__imlib_FreeUpdates(nu);
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return u;
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}
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__imlib_FreeUpdates(u);
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return nu;
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}
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