graphics/eog
graphics/eog
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/eog synced 2024-10-19 22:45:33 +00:00
Code Issues Packages Projects Releases Wiki Activity
eog/libeog/uta.c
Federico Mena Quintero 1bda924eb7 Last night's preparations for 0.4 - Federico
2000-08-16 20:42:08 +00:00

950 lines
25 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Eye of Gnome image viewer - Microtile array utilities
*
* Copyright (C) 2000 The Free Software Foundation
*
* Author: Federico Mena-Quintero <federico@gnu.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glib.h>
#include "uta.h"
#include <libart_lgpl/art_uta_rect.h>
/**
* uta_ensure_size:
* @uta: A microtile array.
* @x1: Left microtile coordinate that must fit in new array.
* @y1: Top microtile coordinate that must fit in new array.
* @x2: Right microtile coordinate that must fit in new array.
* @y2: Bottom microtile coordinate that must fit in new array.
*
* Ensures that the size of a microtile array is big enough to fit the specified
* microtile coordinates. If it is not big enough, the specified @uta will be
* freed and a new one will be returned. Otherwise, the original @uta will be
* returned. If a new microtile array needs to be created, this function will
* copy the @uta's contents to the new array.
*
* Note that the specified coordinates must have already been scaled down by the
* ART_UTILE_SHIFT factor.
*
* Return value: The same value as @uta if the original microtile array was
* big enough to fit the specified microtile coordinates, or a new array if
* it needed to be grown. In the second case, the original @uta will be
* freed automatically.
**/
ArtUta *
uta_ensure_size (ArtUta *uta, int x1, int y1, int x2, int y2)
{
ArtUta *new_uta;
ArtUtaBbox *utiles, *new_utiles;
int new_ofs, ofs;
int x, y;
g_return_val_if_fail (x1 < x2, NULL);
g_return_val_if_fail (y1 < y2, NULL);
if (!uta)
return art_uta_new (x1, y1, x2, y2);
if (x1 >= uta->x0
&& y1 >= uta->y0
&& x2 <= uta->x0 + uta->width
&& y2 <= uta->y0 + uta->height)
return uta;
new_uta = art_new (ArtUta, 1);
new_uta->x0 = MIN (uta->x0, x1);
new_uta->y0 = MIN (uta->y0, y1);
new_uta->width = MAX (uta->x0 + uta->width, x2) - new_uta->x0;
new_uta->height = MAX (uta->y0 + uta->height, y2) - new_uta->y0;
new_uta->utiles = art_new (ArtUtaBbox, new_uta->width * new_uta->height);
utiles = uta->utiles;
new_utiles = new_uta->utiles;
new_ofs = 0;
for (y = new_uta->y0; y < new_uta->y0 + new_uta->height; y++) {
if (y < uta->y0 || y >= uta->y0 + uta->height)
for (x = 0; x < new_uta->width; x++)
new_utiles[new_ofs++] = 0;
else {
ofs = (y - uta->y0) * uta->width;
for (x = new_uta->x0; x < new_uta->x0 + new_uta->width; x++)
if (x < uta->x0 || x >= uta->x0 + uta->width)
new_utiles[new_ofs++] = 0;
else
new_utiles[new_ofs++] = utiles[ofs++];
}
}
art_uta_free (uta);
return new_uta;
}
/**
* uta_add_rect:
* @uta: A microtile array, or NULL if a new array should be created.
* @x1: Left coordinate of rectangle.
* @y1: Top coordinate of rectangle.
* @x2: Right coordinate of rectangle.
* @y2: Bottom coordinate of rectangle.
*
* Adds the specified rectangle to a microtile array. The array is
* grown to fit the rectangle if necessary.
*
* Return value: The original @uta, or a new microtile array if the original one
* needed to be grown to fit the specified rectangle. In the second case, the
* original @uta will be freed automatically.
**/
ArtUta *
uta_add_rect (ArtUta *uta, int x1, int y1, int x2, int y2)
{
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int rect_x1, rect_y1, rect_x2, rect_y2;
int xf1, yf1, xf2, yf2;
int x, y;
int ofs;
g_return_val_if_fail (x1 < x2, NULL);
g_return_val_if_fail (y1 < y2, NULL);
/* Empty uta */
if (!uta) {
ArtIRect r;
r.x0 = x1;
r.y0 = y1;
r.x1 = x2;
r.y1 = y2;
return art_uta_from_irect (&r);
}
/* Grow the uta if necessary */
rect_x1 = x1 >> ART_UTILE_SHIFT;
rect_y1 = y1 >> ART_UTILE_SHIFT;
rect_x2 = (x2 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
rect_y2 = (y2 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
uta = uta_ensure_size (uta, rect_x1, rect_y1, rect_x2, rect_y2);
/* Add the rectangle */
xf1 = x1 & (ART_UTILE_SIZE - 1);
yf1 = y1 & (ART_UTILE_SIZE - 1);
xf2 = ((x2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
yf2 = ((y2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
utiles = uta->utiles;
ofs = (rect_y1 - uta->y0) * uta->width + rect_x1 - uta->x0;
if (rect_y2 - rect_y1 == 1) {
if (rect_x2 - rect_x1 == 1) {
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
xf1, yf1, xf2, yf2);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
MAX (ART_UTA_BBOX_X1 (bb), xf2),
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
} else {
/* Leftmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
xf1, yf1, ART_UTILE_SIZE, yf2);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
/* Tiles in between */
for (x = rect_x1 + 1; x < rect_x2 - 1; x++) {
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
0, yf1, ART_UTILE_SIZE, yf2);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
}
/* Rightmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
0, yf1, xf2, yf2);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
MAX (ART_UTA_BBOX_X1 (bb), xf2),
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
}
} else {
if (rect_x2 - rect_x1 == 1) {
/* Topmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
xf1, yf1, xf2, ART_UTILE_SIZE);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
MAX (ART_UTA_BBOX_X1 (bb), xf2),
ART_UTILE_SIZE);
ofs += uta->width;
/* Tiles in between */
for (y = rect_y1 + 1; y < rect_y2 - 1; y++) {
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
xf1, 0, xf2, ART_UTILE_SIZE);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
0,
MAX (ART_UTA_BBOX_X1 (bb), xf2),
ART_UTILE_SIZE);
ofs += uta->width;
}
/* Bottommost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
xf1, 0, xf2, yf2);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
0,
MAX (ART_UTA_BBOX_X1 (bb), xf2),
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
} else {
/* Top row, leftmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
xf1, yf1, ART_UTILE_SIZE, ART_UTILE_SIZE);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
ART_UTILE_SIZE,
ART_UTILE_SIZE);
/* Top row, in between */
for (x = rect_x1 + 1; x < rect_x2 - 1; x++) {
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
0, yf1, ART_UTILE_SIZE, ART_UTILE_SIZE);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
ART_UTILE_SIZE,
ART_UTILE_SIZE);
}
/* Top row, rightmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
0, yf1, xf2, ART_UTILE_SIZE);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (bb), yf1),
MAX (ART_UTA_BBOX_X1 (bb), xf2),
ART_UTILE_SIZE);
ofs += uta->width - (rect_x2 - rect_x1 - 1);
/* Rows in between */
for (y = rect_y1 + 1; y < rect_y2 - 1; y++) {
/* Leftmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
xf1, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
0,
ART_UTILE_SIZE,
ART_UTILE_SIZE);
/* Tiles in between */
bb = ART_UTA_BBOX_CONS (0, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
for (x = rect_x1 + 1; x < rect_x2 - 1; x++)
utiles[ofs++] = bb;
/* Rightmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
0, 0, xf2, ART_UTILE_SIZE);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
0,
0,
MAX (ART_UTA_BBOX_X1 (bb), xf2),
ART_UTILE_SIZE);
ofs += uta->width - (rect_x2 - rect_x1 - 1);
}
/* Bottom row, leftmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
xf1, 0, ART_UTILE_SIZE, yf2);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (bb), xf1),
0,
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
/* Bottom row, tiles in between */
for (x = rect_x1 + 1; x < rect_x2 - 1; x++) {
bb = utiles[ofs];
if (bb == 0)
utiles[ofs++] = ART_UTA_BBOX_CONS (
0, 0, ART_UTILE_SIZE, yf2);
else
utiles[ofs++] = ART_UTA_BBOX_CONS (
0,
0,
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
}
/* Bottom row, rightmost tile */
bb = utiles[ofs];
if (bb == 0)
utiles[ofs] = ART_UTA_BBOX_CONS (
0, 0, xf2, yf2);
else
utiles[ofs] = ART_UTA_BBOX_CONS (
0,
0,
MAX (ART_UTA_BBOX_X1 (bb), xf2),
MAX (ART_UTA_BBOX_Y1 (bb), yf2));
}
}
return uta;
}
/**
* uta_remove_rect:
* @uta: A microtile array.
* @x1: Left coordinate of rectangle.
* @y1: Top coordinate of rectangle.
* @x2: Right coordinate of rectangle.
* @y2: Bottom coordinate of rectangle.
*
* Removes a rectangular region from the specified microtile array. Due to the
* way microtile arrays represent regions, the tiles at the edge of the
* rectangle may not be clipped exactly.
**/
void
uta_remove_rect (ArtUta *uta, int x1, int y1, int x2, int y2)
{
ArtUtaBbox *utiles;
int rect_x1, rect_y1, rect_x2, rect_y2;
int clip_x1, clip_y1, clip_x2, clip_y2;
int xf1, yf1, xf2, yf2;
int ofs;
int x, y;
g_return_if_fail (uta != NULL);
g_return_if_fail (x1 <= x2);
g_return_if_fail (y1 <= y2);
if (x1 == x2 || y1 == y2)
return;
rect_x1 = x1 >> ART_UTILE_SHIFT;
rect_y1 = y1 >> ART_UTILE_SHIFT;
rect_x2 = (x2 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
rect_y2 = (y2 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
clip_x1 = MAX (rect_x1, uta->x0);
clip_y1 = MAX (rect_y1, uta->y0);
clip_x2 = MIN (rect_x2, uta->x0 + uta->width);
clip_y2 = MIN (rect_y2, uta->y0 + uta->height);
if (clip_x1 >= clip_x2 || clip_y1 >= clip_y2)
return;
xf1 = x1 & (ART_UTILE_SIZE - 1);
yf1 = y1 & (ART_UTILE_SIZE - 1);
xf2 = ((x2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
yf2 = ((y2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
utiles = uta->utiles;
ofs = (clip_y1 - uta->y0) * uta->width + clip_x1 - uta->x0;
for (y = clip_y1; y < clip_y2; y++) {
int cy1, cy2;
if (y == rect_y1)
cy1 = yf1;
else
cy1 = 0;
if (y == rect_y2 - 1)
cy2 = yf2;
else
cy2 = ART_UTILE_SIZE;
for (x = clip_x1; x < clip_x2; x++) {
int cx1, cx2;
ArtUtaBbox bb;
int bb_x1, bb_y1, bb_x2, bb_y2;
int bb_cx1, bb_cy1, bb_cx2, bb_cy2;
bb = utiles[ofs];
bb_x1 = ART_UTA_BBOX_X0 (bb);
bb_y1 = ART_UTA_BBOX_Y0 (bb);
bb_x2 = ART_UTA_BBOX_X1 (bb);
bb_y2 = ART_UTA_BBOX_Y1 (bb);
if (x == rect_x1)
cx1 = xf1;
else
cx1 = 0;
if (x == rect_x2 - 1)
cx2 = xf2;
else
cx2 = ART_UTILE_SIZE;
/* Clip top and bottom */
if (cx1 <= bb_x1 && cx2 >= bb_x2) {
if (cy1 <= bb_y1 && cy2 > bb_y1)
bb_cy1 = cy2;
else
bb_cy1 = bb_y1;
if (cy1 < bb_y2 && cy2 >= bb_y2)
bb_cy2 = cy1;
else
bb_cy2 = bb_y2;
} else {
bb_cy1 = bb_y1;
bb_cy2 = bb_y2;
}
/* Clip left and right */
if (cy1 <= bb_y1 && cy2 >= bb_y2) {
if (cx1 <= bb_x1 && cx2 > bb_x1)
bb_cx1 = cx2;
else
bb_cx1 = bb_x1;
if (cx1 < bb_x2 && cx2 >= bb_x2)
bb_cx2 = cx1;
else
bb_cx2 = bb_x2;
} else {
bb_cx1 = bb_x1;
bb_cx2 = bb_x2;
}
if (bb_cx1 < bb_cx2 && bb_cy1 < bb_cy2)
utiles[ofs] = ART_UTA_BBOX_CONS (bb_cx1, bb_cy1,
bb_cx2, bb_cy2);
else
utiles[ofs] = 0;
ofs++;
}
ofs += uta->width - (clip_x2 - clip_x1);
}
}
void
uta_find_first_glom_rect (ArtUta *uta, ArtIRect *rect, int max_width, int max_height)
{
ArtIRect *rects;
int n_rects, n_rects_max;
int x, y;
int width, height;
int ix;
int left_ix;
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int x0, y0, x1, y1;
int *glom;
int glom_rect;
n_rects = 0;
n_rects_max = 1;
rects = art_new (ArtIRect, n_rects_max);
width = uta->width;
height = uta->height;
utiles = uta->utiles;
glom = art_new (int, width * height);
for (ix = 0; ix < width * height; ix++)
glom[ix] = -1;
ix = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
bb = utiles[ix];
if (bb)
{
x0 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X0(bb);
y0 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y0(bb);
y1 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y1(bb);
left_ix = ix;
/* now try to extend to the right */
while (x != width - 1 &&
ART_UTA_BBOX_X1(bb) == ART_UTILE_SIZE &&
(((bb & 0xffffff) ^ utiles[ix + 1]) & 0xffff00ff) == 0 &&
(((uta->x0 + x + 1) << ART_UTILE_SHIFT) +
ART_UTA_BBOX_X1(utiles[ix + 1]) -
x0) <= max_width)
{
bb = utiles[ix + 1];
ix++;
x++;
}
x1 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X1(bb);
/* if rectangle nonempty */
if ((x1 ^ x0) | (y1 ^ y0))
{
/* try to glom onto an existing rectangle */
glom_rect = glom[left_ix];
if (glom_rect != -1 &&
x0 == rects[glom_rect].x0 &&
x1 == rects[glom_rect].x1 &&
y0 == rects[glom_rect].y1 &&
y1 - rects[glom_rect].y0 <= max_height)
{
rects[glom_rect].y1 = y1;
}
else
{
if (n_rects == n_rects_max)
art_expand (rects, ArtIRect, n_rects_max);
rects[n_rects].x0 = x0;
rects[n_rects].y0 = y0;
rects[n_rects].x1 = x1;
rects[n_rects].y1 = y1;
glom_rect = n_rects;
n_rects++;
}
if (y != height - 1)
glom[left_ix + width] = glom_rect;
}
}
ix++;
}
if (n_rects > 0) {
rect->x0 = rects[0].x0;
rect->y0 = rects[0].y0;
rect->x1 = rects[0].x1;
rect->y1 = rects[0].y1;
} else
rect->x0 = rect->y0 = rect->x1 = rect->y1 = 0;
art_free (glom);
art_free (rects);
}
#if 0
void
uta_find_first_glom_rect (ArtUta *uta, ArtIRect *rect, int max_width, int max_height)
{
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int width, height;
int ofs;
int x, y;
int x1, y1, x2, y2;
g_return_if_fail (uta != NULL);
g_return_if_fail (rect != NULL);
g_return_if_fail (max_width > 0 && max_height > 0);
utiles = uta->utiles;
width = uta->width;
height = uta->height;
ofs = 0;
/* We find the first nonempty tile, and then grow the rectangle to the
* right and then down.
*/
x1 = y1 = x2 = y2 = 0;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
bb = utiles[ofs];
if (!bb) {
ofs++;
continue;
}
x1 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X0 (bb);
y1 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y0 (bb);
y2 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y1 (bb);
/* Grow to the right */
while (x != width - 1
&& ART_UTA_BBOX_X1 (bb) == ART_UTILE_SIZE
&& (((bb & 0xffffff) ^ utiles[ofs + 1]) & 0xffff00ff) == 0
&& (((uta->x0 + x + 1) << ART_UTILE_SHIFT)
+ ART_UTA_BBOX_X1 (utiles[ofs + 1])
- x1) <= max_width) {
ofs++;
bb = utiles[ofs];
x++;
}
x2 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X1 (bb);
goto grow_down;
}
}
grow_down:
}
#endif
/* Copies a single microtile to another location in the UTA, offsetted by the
* specified distance. A microtile can thus end up being added in a single part
* to another microtile, in two parts to two horizontally or vertically adjacent
* microtiles, or in four parts to a 2x2 square of microtiles.
*
* This is basically a normal BitBlt but with copying-forwards-to-the-destination
* instead of fetching-backwards-from-the-source.
*/
static void
copy_tile (ArtUta *uta, int x, int y, int xofs, int yofs)
{
ArtUtaBbox *utiles;
ArtUtaBbox bb, dbb;
int t_x1, t_y1, t_x2, t_y2;
int d_x1, d_y1, d_x2, d_y2;
int d_tx1, d_ty1;
int d_xf1, d_yf1, d_xf2, d_yf2;
int dofs;
utiles = uta->utiles;
bb = utiles[(y - uta->y0) * uta->width + x - uta->x0];
if (bb == 0)
return;
t_x1 = ART_UTA_BBOX_X0 (bb) + (x << ART_UTILE_SHIFT);
t_y1 = ART_UTA_BBOX_Y0 (bb) + (y << ART_UTILE_SHIFT);
t_x2 = ART_UTA_BBOX_X1 (bb) + (x << ART_UTILE_SHIFT);
t_y2 = ART_UTA_BBOX_Y1 (bb) + (y << ART_UTILE_SHIFT);
d_x1 = t_x1 + xofs;
d_y1 = t_y1 + yofs;
d_x2 = t_x2 + xofs;
d_y2 = t_y2 + yofs;
d_tx1 = d_x1 >> ART_UTILE_SHIFT;
d_ty1 = d_y1 >> ART_UTILE_SHIFT;
dofs = (d_ty1 - uta->y0) * uta->width + d_tx1 - uta->x0;
d_xf1 = d_x1 & (ART_UTILE_SIZE - 1);
d_yf1 = d_y1 & (ART_UTILE_SIZE - 1);
d_xf2 = ((d_x2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
d_yf2 = ((d_y2 - 1) & (ART_UTILE_SIZE - 1)) + 1;
if (d_x2 - d_x1 <= ART_UTILE_SIZE - d_xf1) {
if (d_y2 - d_y1 <= ART_UTILE_SIZE - d_yf1) {
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, d_yf1, d_xf2, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
} else {
/* Top tile */
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, d_yf1, d_xf2, ART_UTILE_SIZE);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
ART_UTILE_SIZE);
}
dofs += uta->width;
/* Bottom tile */
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 + 1 >= uta->y0 && d_ty1 + 1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, 0, d_xf2, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
0,
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
}
} else {
if (d_y2 - d_y1 <= ART_UTILE_SIZE - d_yf1) {
/* Left tile */
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, d_yf1, ART_UTILE_SIZE, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
dofs++;
/* Right tile */
if (d_tx1 + 1 >= uta->x0 && d_tx1 + 1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
0, d_yf1, d_xf2, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
} else {
/* Top left tile */
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, d_yf1, ART_UTILE_SIZE, ART_UTILE_SIZE);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
ART_UTILE_SIZE,
ART_UTILE_SIZE);
}
dofs++;
/* Top right tile */
if (d_tx1 + 1 >= uta->x0 && d_tx1 + 1 < uta->x0 + uta->width
&& d_ty1 >= uta->y0 && d_ty1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
0, d_yf1, d_xf2, ART_UTILE_SIZE);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
0,
MIN (ART_UTA_BBOX_Y0 (dbb), d_yf1),
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
ART_UTILE_SIZE);
}
dofs += uta->width - 1;
/* Bottom left tile */
if (d_tx1 >= uta->x0 && d_tx1 < uta->x0 + uta->width
&& d_ty1 + 1 >= uta->y0 && d_ty1 + 1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
d_xf1, 0, ART_UTILE_SIZE, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
MIN (ART_UTA_BBOX_X0 (dbb), d_xf1),
0,
ART_UTILE_SIZE,
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
dofs++;
/* Bottom right tile */
if (d_tx1 + 1 >= uta->x0 && d_tx1 + 1 < uta->x0 + uta->width
&& d_ty1 + 1 >= uta->y0 && d_ty1 + 1 < uta->y0 + uta->height) {
dbb = utiles[dofs];
if (dbb == 0)
utiles[dofs] = ART_UTA_BBOX_CONS (
0, 0, d_xf2, d_yf2);
else
utiles[dofs] = ART_UTA_BBOX_CONS (
0,
0,
MAX (ART_UTA_BBOX_X1 (dbb), d_xf2),
MAX (ART_UTA_BBOX_Y1 (dbb), d_yf2));
}
}
}
}
/**
* uta_copy_area:
* @uta: A microtile array.
* @src_x: Left coordinate of source rectangle.
* @src_y: Top coordinate of source rectangle.
* @dest_x: Left coordinate of destination.
* @dest_y: Top coordinate of destination.
* @width: Width of region to copy.
* @height: Height of region to copy.
*
* Copies a rectangular region within a microtile array. The array will not be
* expanded if the destination area does not fit within it; rather only the area
* that fits will be copied. The source rectangle must be completely contained
* within the microtile array.
**/
void
uta_copy_area (ArtUta *uta, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
{
ArtUtaBbox *utiles;
int rect_x1, rect_y1, rect_x2, rect_y2;
gboolean top_to_bottom, left_to_right;
int xofs, yofs;
int x, y;
g_return_if_fail (uta != NULL);
g_return_if_fail (width >= 0 && height >= 0);
g_return_if_fail (src_x >= uta->x0 << ART_UTILE_SHIFT);
g_return_if_fail (src_y >= uta->y0 << ART_UTILE_SHIFT);
g_return_if_fail (src_x + width <= (uta->x0 + uta->width) << ART_UTILE_SHIFT);
g_return_if_fail (src_y + height <= (uta->y0 + uta->height) << ART_UTILE_SHIFT);
if ((src_x == dest_x && src_y == dest_y) || width == 0 || height == 0)
return;
/* FIXME: This function is not perfect. It *adds* the copied/offsetted
* area to the original contents of the microtile array, thus growing
* the region more than needed. The effect should be to "overwrite" the
* original contents, just like XCopyArea() does. Care needs to be
* taken when the edges of the rectangle do not fall on microtile
* boundaries, because tiles may need to be "split".
*
* Maybe this will work:
*
* 1. Copy the rectangular array of tiles that form the region to a
* temporary buffer.
*
* 2. uta_remove_rect() the *destination* rectangle from the original
* microtile array.
*
* 3. Copy back the temporary buffer to the original array while
* offsetting it in the same way as copy_tile() does.
*/
utiles = uta->utiles;
rect_x1 = src_x >> ART_UTILE_SHIFT;
rect_y1 = src_y >> ART_UTILE_SHIFT;
rect_x2 = (src_x + width + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
rect_y2 = (src_y + height + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT;
xofs = dest_x - src_x;
yofs = dest_y - src_y;
left_to_right = xofs < 0;
top_to_bottom = yofs < 0;
if (top_to_bottom && left_to_right) {
for (y = rect_y1; y < rect_y2; y++)
for (x = rect_x1; x < rect_x2; x++)
copy_tile (uta, x, y, xofs, yofs);
} else if (top_to_bottom && !left_to_right) {
for (y = rect_y1; y < rect_y2; y++)
for (x = rect_x2 - 1; x >= rect_x1; x--)
copy_tile (uta, x, y, xofs, yofs);
} else if (!top_to_bottom && left_to_right) {
for (y = rect_y2 - 1; y >= rect_y1; y--)
for (x = rect_x1; x < rect_x2; x++)
copy_tile (uta, x, y, xofs, yofs);
} else if (!top_to_bottom && !left_to_right) {
for (y = rect_y2 - 1; y >= rect_y1; y--)
for (x = rect_x2 - 1; x >= rect_x1; x--)
copy_tile (uta, x, y, xofs, yofs);
}
}
Reference in a new issue View git blame Copy permalink