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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "art_uta_rect.h"
#include "art_misc.h"
#include "art_uta.h"
#include "art_rect.h"
/**
* art_uta_from_irect: Generate uta covering a rectangle.
* @bbox: The source rectangle.
*
* Generates a uta exactly covering @bbox. Please do not call this
* function with a @bbox with zero height or width.
*
* Return value: the new uta.
**/
ArtUta *
art_uta_from_irect (ArtIRect *bbox)
{
ArtUta *uta;
ArtUtaBbox *utiles;
ArtUtaBbox bb;
gint width, height;
gint x, y;
gint xf0, yf0, xf1, yf1;
gint ix;
uta = art_new (ArtUta, 1);
uta->x0 = bbox->x0 >> ART_UTILE_SHIFT;
uta->y0 = bbox->y0 >> ART_UTILE_SHIFT;
width = ((bbox->x1 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT) - uta->x0;
height = ((bbox->y1 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT) - uta->y0;
utiles = art_new (ArtUtaBbox, width * height);
uta->width = width;
uta->height = height;
uta->utiles = utiles;
xf0 = bbox->x0 & (ART_UTILE_SIZE - 1);
yf0 = bbox->y0 & (ART_UTILE_SIZE - 1);
xf1 = ((bbox->x1 - 1) & (ART_UTILE_SIZE - 1)) + 1;
yf1 = ((bbox->y1 - 1) & (ART_UTILE_SIZE - 1)) + 1;
if (height == 1)
{
if (width == 1)
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, xf1, yf1);
else
{
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, ART_UTILE_SIZE, yf1);
bb = ART_UTA_BBOX_CONS (0, yf0, ART_UTILE_SIZE, yf1);
for (x = 1; x < width - 1; x++)
utiles[x] = bb;
utiles[x] = ART_UTA_BBOX_CONS (0, yf0, xf1, yf1);
}
}
else
{
if (width == 1)
{
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, xf1, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (xf0, 0, xf1, ART_UTILE_SIZE);
for (y = 1; y < height - 1; y++)
utiles[y] = bb;
utiles[y] = ART_UTA_BBOX_CONS (xf0, 0, xf1, yf1);
}
else
{
utiles[0] =
ART_UTA_BBOX_CONS (xf0, yf0, ART_UTILE_SIZE, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (0, yf0, ART_UTILE_SIZE, ART_UTILE_SIZE);
for (x = 1; x < width - 1; x++)
utiles[x] = bb;
utiles[x] = ART_UTA_BBOX_CONS (0, yf0, xf1, ART_UTILE_SIZE);
ix = width;
for (y = 1; y < height - 1; y++)
{
utiles[ix++] =
ART_UTA_BBOX_CONS (xf0, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (0, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
for (x = 1; x < width - 1; x++)
utiles[ix++] = bb;
utiles[ix++] = ART_UTA_BBOX_CONS (0, 0, xf1, ART_UTILE_SIZE);
}
utiles[ix++] = ART_UTA_BBOX_CONS (xf0, 0, ART_UTILE_SIZE, yf1);
bb = ART_UTA_BBOX_CONS (0, 0, ART_UTILE_SIZE, yf1);
for (x = 1; x < width - 1; x++)
utiles[ix++] = bb;
utiles[ix++] = ART_UTA_BBOX_CONS (0, 0, xf1, yf1);
}
}
return uta;
}
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