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Diffstat (limited to 'src/uta.c')
| -rw-r--r-- | src/uta.c | 1114 |
1 files changed, 0 insertions, 1114 deletions
diff --git a/src/uta.c b/src/uta.c deleted file mode 100644 index c44834d..0000000 --- a/src/uta.c +++ /dev/null @@ -1,1114 +0,0 @@ -/* Eye of Mate image viewer - Microtile array utilities - * - * Copyright (C) 2000-2009 The Free Software Foundation - * - * Author: Federico Mena-Quintero <[email protected]> - * - * Portions based on code from libart_lgpl by Raph Levien. - * - * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include <config.h> -#include <glib.h> -#include "uta.h" - -#define EOM_UTA_BBOX_CONS(x0, y0, x1, y1) (((x0) << 24) | ((y0) << 16) | \ - ((x1) << 8) | (y1)) - -#define EOM_UTA_BBOX_X0(ub) ((ub) >> 24) -#define EOM_UTA_BBOX_Y0(ub) (((ub) >> 16) & 0xff) -#define EOM_UTA_BBOX_X1(ub) (((ub) >> 8) & 0xff) -#define EOM_UTA_BBOX_Y1(ub) ((ub) & 0xff) - -#define eom_renew(p, type, n) ((type *)g_realloc (p, (n) * sizeof(type))) -/* This one must be used carefully - in particular, p and max should - be variables. They can also be pstruct->el lvalues. */ -#define eom_expand(p, type, max) do { if(max) { p = eom_renew (p, type, max <<= 1); } else { max = 1; p = g_new(type, 1); } } while (0) - -/* - * eom_uta_new: Allocate a new uta. - * @x0: Left coordinate of uta. - * @y0: Top coordinate of uta. - * @x1: Right coordinate of uta. - * @y1: Bottom coordinate of uta. - * - * Allocates a new microtile array. The arguments are in units of - * tiles, not pixels. - * - * Returns: the newly allocated #EomUta. - */ -static EomUta * -eom_uta_new (int x0, int y0, int x1, int y1) -{ - EomUta *uta; - - uta = g_new (EomUta, 1); - uta->x0 = x0; - uta->y0 = y0; - uta->width = x1 - x0; - uta->height = y1 - y0; - - uta->utiles = g_new0 (EomUtaBbox, uta->width * uta->height); - - return uta; -} - -/* - * eom_uta_free: Free a uta. - * @uta: The uta to free. - * - * Frees the microtile array structure, including the actual microtile - * data. - */ -void -eom_uta_free (EomUta *uta) -{ - g_free (uta->utiles); - g_free (uta); -} - -/* - * eom_irect_intersect: Find intersection of two integer rectangles. - * @dest: Where the result is stored. - * @src1: A source rectangle. - * @src2: Another source rectangle. - * - * Finds the intersection of @src1 and @src2. - */ -void -eom_irect_intersect (EomIRect *dest, const EomIRect *src1, const EomIRect *src2) { - dest->x0 = MAX (src1->x0, src2->x0); - dest->y0 = MAX (src1->y0, src2->y0); - dest->x1 = MIN (src1->x1, src2->x1); - dest->y1 = MIN (src1->y1, src2->y1); -} - -/* - * eom_irect_empty: Determine whether integer rectangle is empty. - * @src: The source rectangle. - * - * Return value: TRUE if @src is an empty rectangle, FALSE otherwise. - */ -int -eom_irect_empty (const EomIRect *src) { - return (src->x1 <= src->x0 || src->y1 <= src->y0); -} - -/* - * eom_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. - */ -static EomUta * -eom_uta_from_irect (EomIRect *bbox) -{ - EomUta *uta; - EomUtaBbox *utiles; - EomUtaBbox bb; - int width, height; - int x, y; - int xf0, yf0, xf1, yf1; - int ix; - - uta = g_new (EomUta, 1); - uta->x0 = bbox->x0 >> EOM_UTILE_SHIFT; - uta->y0 = bbox->y0 >> EOM_UTILE_SHIFT; - width = ((bbox->x1 + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT) - uta->x0; - height = ((bbox->y1 + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT) - uta->y0; - utiles = g_new (EomUtaBbox, width * height); - - uta->width = width; - uta->height = height; - uta->utiles = utiles; - - xf0 = bbox->x0 & (EOM_UTILE_SIZE - 1); - yf0 = bbox->y0 & (EOM_UTILE_SIZE - 1); - xf1 = ((bbox->x1 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - yf1 = ((bbox->y1 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - if (height == 1) - { - if (width == 1) - utiles[0] = EOM_UTA_BBOX_CONS (xf0, yf0, xf1, yf1); - else - { - utiles[0] = EOM_UTA_BBOX_CONS (xf0, yf0, EOM_UTILE_SIZE, yf1); - bb = EOM_UTA_BBOX_CONS (0, yf0, EOM_UTILE_SIZE, yf1); - for (x = 1; x < width - 1; x++) - utiles[x] = bb; - utiles[x] = EOM_UTA_BBOX_CONS (0, yf0, xf1, yf1); - } - } - else - { - if (width == 1) - { - utiles[0] = EOM_UTA_BBOX_CONS (xf0, yf0, xf1, EOM_UTILE_SIZE); - bb = EOM_UTA_BBOX_CONS (xf0, 0, xf1, EOM_UTILE_SIZE); - for (y = 1; y < height - 1; y++) - utiles[y] = bb; - utiles[y] = EOM_UTA_BBOX_CONS (xf0, 0, xf1, yf1); - } - else - { - utiles[0] = - EOM_UTA_BBOX_CONS (xf0, yf0, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - bb = EOM_UTA_BBOX_CONS (0, yf0, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - for (x = 1; x < width - 1; x++) - utiles[x] = bb; - utiles[x] = EOM_UTA_BBOX_CONS (0, yf0, xf1, EOM_UTILE_SIZE); - ix = width; - for (y = 1; y < height - 1; y++) - { - utiles[ix++] = - EOM_UTA_BBOX_CONS (xf0, 0, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - bb = EOM_UTA_BBOX_CONS (0, 0, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - for (x = 1; x < width - 1; x++) - utiles[ix++] = bb; - utiles[ix++] = EOM_UTA_BBOX_CONS (0, 0, xf1, EOM_UTILE_SIZE); - } - utiles[ix++] = EOM_UTA_BBOX_CONS (xf0, 0, EOM_UTILE_SIZE, yf1); - bb = EOM_UTA_BBOX_CONS (0, 0, EOM_UTILE_SIZE, yf1); - for (x = 1; x < width - 1; x++) - utiles[ix++] = bb; - utiles[ix++] = EOM_UTA_BBOX_CONS (0, 0, xf1, yf1); - } - } - return uta; -} - - -/** - * 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. - */ -EomUta * -uta_ensure_size (EomUta *uta, int x1, int y1, int x2, int y2) -{ - EomUta *new_uta; - EomUtaBbox *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 eom_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 = g_new (EomUta, 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 = g_new (EomUtaBbox, 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++]; - } - } - - eom_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. - */ -EomUta * -uta_add_rect (EomUta *uta, int x1, int y1, int x2, int y2) -{ - EomUtaBbox *utiles; - EomUtaBbox 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) { - EomIRect r; - - r.x0 = x1; - r.y0 = y1; - r.x1 = x2; - r.y1 = y2; - - return eom_uta_from_irect (&r); - } - - /* Grow the uta if necessary */ - - rect_x1 = x1 >> EOM_UTILE_SHIFT; - rect_y1 = y1 >> EOM_UTILE_SHIFT; - rect_x2 = (x2 + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT; - rect_y2 = (y2 + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT; - - uta = uta_ensure_size (uta, rect_x1, rect_y1, rect_x2, rect_y2); - - /* Add the rectangle */ - - xf1 = x1 & (EOM_UTILE_SIZE - 1); - yf1 = y1 & (EOM_UTILE_SIZE - 1); - xf2 = ((x2 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - yf2 = ((y2 - 1) & (EOM_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] = EOM_UTA_BBOX_CONS ( - xf1, yf1, xf2, yf2); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - MAX (EOM_UTA_BBOX_Y1 (bb), yf2)); - } else { - /* Leftmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - xf1, yf1, EOM_UTILE_SIZE, yf2); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - EOM_UTILE_SIZE, - MAX (EOM_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++] = EOM_UTA_BBOX_CONS ( - 0, yf1, EOM_UTILE_SIZE, yf2); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - EOM_UTILE_SIZE, - MAX (EOM_UTA_BBOX_Y1 (bb), yf2)); - } - - /* Rightmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, yf1, xf2, yf2); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - MAX (EOM_UTA_BBOX_Y1 (bb), yf2)); - } - } else { - if (rect_x2 - rect_x1 == 1) { - /* Topmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs] = EOM_UTA_BBOX_CONS ( - xf1, yf1, xf2, EOM_UTILE_SIZE); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - EOM_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] = EOM_UTA_BBOX_CONS ( - xf1, 0, xf2, EOM_UTILE_SIZE); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - 0, - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - EOM_UTILE_SIZE); - ofs += uta->width; - } - - /* Bottommost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs] = EOM_UTA_BBOX_CONS ( - xf1, 0, xf2, yf2); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - 0, - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - MAX (EOM_UTA_BBOX_Y1 (bb), yf2)); - } else { - /* Top row, leftmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - xf1, yf1, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - EOM_UTILE_SIZE, - EOM_UTILE_SIZE); - - /* Top row, in between */ - for (x = rect_x1 + 1; x < rect_x2 - 1; x++) { - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - 0, yf1, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - EOM_UTILE_SIZE, - EOM_UTILE_SIZE); - } - - /* Top row, rightmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, yf1, xf2, EOM_UTILE_SIZE); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (bb), yf1), - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - EOM_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++] = EOM_UTA_BBOX_CONS ( - xf1, 0, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - 0, - EOM_UTILE_SIZE, - EOM_UTILE_SIZE); - - /* Tiles in between */ - bb = EOM_UTA_BBOX_CONS (0, 0, EOM_UTILE_SIZE, EOM_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] = EOM_UTA_BBOX_CONS ( - 0, 0, xf2, EOM_UTILE_SIZE); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, - 0, - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - EOM_UTILE_SIZE); - - ofs += uta->width - (rect_x2 - rect_x1 - 1); - } - - /* Bottom row, leftmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - xf1, 0, EOM_UTILE_SIZE, yf2); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (bb), xf1), - 0, - EOM_UTILE_SIZE, - MAX (EOM_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++] = EOM_UTA_BBOX_CONS ( - 0, 0, EOM_UTILE_SIZE, yf2); - else - utiles[ofs++] = EOM_UTA_BBOX_CONS ( - 0, - 0, - EOM_UTILE_SIZE, - MAX (EOM_UTA_BBOX_Y1 (bb), yf2)); - } - - /* Bottom row, rightmost tile */ - bb = utiles[ofs]; - if (bb == 0) - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, 0, xf2, yf2); - else - utiles[ofs] = EOM_UTA_BBOX_CONS ( - 0, - 0, - MAX (EOM_UTA_BBOX_X1 (bb), xf2), - MAX (EOM_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 (EomUta *uta, int x1, int y1, int x2, int y2) -{ - EomUtaBbox *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 >> EOM_UTILE_SHIFT; - rect_y1 = y1 >> EOM_UTILE_SHIFT; - rect_x2 = (x2 + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT; - rect_y2 = (y2 + EOM_UTILE_SIZE - 1) >> EOM_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 & (EOM_UTILE_SIZE - 1); - yf1 = y1 & (EOM_UTILE_SIZE - 1); - xf2 = ((x2 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - yf2 = ((y2 - 1) & (EOM_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 = EOM_UTILE_SIZE; - - for (x = clip_x1; x < clip_x2; x++) { - int cx1, cx2; - EomUtaBbox bb; - int bb_x1, bb_y1, bb_x2, bb_y2; - int bb_cx1, bb_cy1, bb_cx2, bb_cy2; - - bb = utiles[ofs]; - bb_x1 = EOM_UTA_BBOX_X0 (bb); - bb_y1 = EOM_UTA_BBOX_Y0 (bb); - bb_x2 = EOM_UTA_BBOX_X1 (bb); - bb_y2 = EOM_UTA_BBOX_Y1 (bb); - - if (x == rect_x1) - cx1 = xf1; - else - cx1 = 0; - - if (x == rect_x2 - 1) - cx2 = xf2; - else - cx2 = EOM_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] = EOM_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 (EomUta *uta, EomIRect *rect, int max_width, int max_height) -{ - EomIRect *rects; - int n_rects, n_rects_max; - int x, y; - int width, height; - int ix; - int left_ix; - EomUtaBbox *utiles; - EomUtaBbox bb; - int x0, y0, x1, y1; - int *glom; - int glom_rect; - - n_rects = 0; - n_rects_max = 1; - rects = g_new (EomIRect, n_rects_max); - - width = uta->width; - height = uta->height; - utiles = uta->utiles; - - glom = g_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) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_X0(bb); - y0 = ((uta->y0 + y) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_Y0(bb); - y1 = ((uta->y0 + y) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_Y1(bb); - - left_ix = ix; - /* now try to extend to the right */ - while (x != width - 1 && - EOM_UTA_BBOX_X1(bb) == EOM_UTILE_SIZE && - (((bb & 0xffffff) ^ utiles[ix + 1]) & 0xffff00ff) == 0 && - (((uta->x0 + x + 1) << EOM_UTILE_SHIFT) + - EOM_UTA_BBOX_X1(utiles[ix + 1]) - - x0) <= max_width) - { - bb = utiles[ix + 1]; - ix++; - x++; - } - x1 = ((uta->x0 + x) << EOM_UTILE_SHIFT) + EOM_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) - eom_expand (rects, EomIRect, 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; - - g_free (glom); - g_free (rects); -} - -#if 0 - -void -uta_find_first_glom_rect (EomUta *uta, EomIRect *rect, int max_width, int max_height) -{ - EomUtaBbox *utiles; - EomUtaBbox 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) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_X0 (bb); - y1 = ((uta->y0 + y) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_Y0 (bb); - y2 = ((uta->y0 + y) << EOM_UTILE_SHIFT) + EOM_UTA_BBOX_Y1 (bb); - - /* Grow to the right */ - - while (x != width - 1 - && EOM_UTA_BBOX_X1 (bb) == EOM_UTILE_SIZE - && (((bb & 0xffffff) ^ utiles[ofs + 1]) & 0xffff00ff) == 0 - && (((uta->x0 + x + 1) << EOM_UTILE_SHIFT) - + EOM_UTA_BBOX_X1 (utiles[ofs + 1]) - - x1) <= max_width) { - ofs++; - bb = utiles[ofs]; - x++; - } - - x2 = ((uta->x0 + x) << EOM_UTILE_SHIFT) + EOM_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 (EomUta *uta, int x, int y, int xofs, int yofs) -{ - EomUtaBbox *utiles; - EomUtaBbox 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 = EOM_UTA_BBOX_X0 (bb) + (x << EOM_UTILE_SHIFT); - t_y1 = EOM_UTA_BBOX_Y0 (bb) + (y << EOM_UTILE_SHIFT); - t_x2 = EOM_UTA_BBOX_X1 (bb) + (x << EOM_UTILE_SHIFT); - t_y2 = EOM_UTA_BBOX_Y1 (bb) + (y << EOM_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 >> EOM_UTILE_SHIFT; - d_ty1 = d_y1 >> EOM_UTILE_SHIFT; - - dofs = (d_ty1 - uta->y0) * uta->width + d_tx1 - uta->x0; - - d_xf1 = d_x1 & (EOM_UTILE_SIZE - 1); - d_yf1 = d_y1 & (EOM_UTILE_SIZE - 1); - d_xf2 = ((d_x2 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - d_yf2 = ((d_y2 - 1) & (EOM_UTILE_SIZE - 1)) + 1; - - if (d_x2 - d_x1 <= EOM_UTILE_SIZE - d_xf1) { - if (d_y2 - d_y1 <= EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, d_yf1, d_xf2, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - MAX (EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, d_yf1, d_xf2, EOM_UTILE_SIZE); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, 0, d_xf2, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - 0, - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - MAX (EOM_UTA_BBOX_Y1 (dbb), d_yf2)); - } - } - } else { - if (d_y2 - d_y1 <= EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, d_yf1, EOM_UTILE_SIZE, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - EOM_UTILE_SIZE, - MAX (EOM_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] = EOM_UTA_BBOX_CONS ( - 0, d_yf1, d_xf2, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - MAX (EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, d_yf1, EOM_UTILE_SIZE, EOM_UTILE_SIZE); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - EOM_UTILE_SIZE, - EOM_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] = EOM_UTA_BBOX_CONS ( - 0, d_yf1, d_xf2, EOM_UTILE_SIZE); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - 0, - MIN (EOM_UTA_BBOX_Y0 (dbb), d_yf1), - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - EOM_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] = EOM_UTA_BBOX_CONS ( - d_xf1, 0, EOM_UTILE_SIZE, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - MIN (EOM_UTA_BBOX_X0 (dbb), d_xf1), - 0, - EOM_UTILE_SIZE, - MAX (EOM_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] = EOM_UTA_BBOX_CONS ( - 0, 0, d_xf2, d_yf2); - else - utiles[dofs] = EOM_UTA_BBOX_CONS ( - 0, - 0, - MAX (EOM_UTA_BBOX_X1 (dbb), d_xf2), - MAX (EOM_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 (EomUta *uta, int src_x, int src_y, int dest_x, int dest_y, int width, int height) -{ - 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 << EOM_UTILE_SHIFT); - g_return_if_fail (src_y >= uta->y0 << EOM_UTILE_SHIFT); - g_return_if_fail (src_x + width <= (uta->x0 + uta->width) << EOM_UTILE_SHIFT); - g_return_if_fail (src_y + height <= (uta->y0 + uta->height) << EOM_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. - */ - - rect_x1 = src_x >> EOM_UTILE_SHIFT; - rect_y1 = src_y >> EOM_UTILE_SHIFT; - rect_x2 = (src_x + width + EOM_UTILE_SIZE - 1) >> EOM_UTILE_SHIFT; - rect_y2 = (src_y + height + EOM_UTILE_SIZE - 1) >> EOM_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); - } -} |