зеркало из https://github.com/mozilla/pjs.git
110 строки
3.4 KiB
C
110 строки
3.4 KiB
C
/* 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 "art_misc.h"
|
|
#include "art_uta.h"
|
|
#include "art_rect.h"
|
|
#include "art_uta_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;
|
|
int width, height;
|
|
int x, y;
|
|
int xf0, yf0, xf1, yf1;
|
|
int 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;
|
|
}
|