- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright 2016-2020 Pierre Ossman for Cendio AB
- *
- * This 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 software 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 software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #include <rfb/Region.h>
- #include <rfb/LogWriter.h>
-
- extern "C" {
- #include <pixman.h>
- }
-
- static rfb::LogWriter vlog("Region");
-
- rfb::Region::Region() {
- rgn = new struct pixman_region16;
- pixman_region_init(rgn);
- }
-
- rfb::Region::Region(const Rect& r) {
- rgn = new struct pixman_region16;
- pixman_region_init_rect(rgn, r.tl.x, r.tl.y, r.width(), r.height());
- }
-
- rfb::Region::Region(const rfb::Region& r) {
- rgn = new struct pixman_region16;
- pixman_region_init(rgn);
- pixman_region_copy(rgn, r.rgn);
- }
-
- rfb::Region::~Region() {
- pixman_region_fini(rgn);
- delete rgn;
- }
-
- rfb::Region& rfb::Region::operator=(const rfb::Region& r) {
- pixman_region_copy(rgn, r.rgn);
- return *this;
- }
-
- void rfb::Region::clear() {
- // pixman_region_clear() isn't available on some older systems
- pixman_region_fini(rgn);
- pixman_region_init(rgn);
- }
-
- void rfb::Region::reset(const Rect& r) {
- pixman_region_fini(rgn);
- pixman_region_init_rect(rgn, r.tl.x, r.tl.y, r.width(), r.height());
- }
-
- void rfb::Region::translate(const Point& delta) {
- pixman_region_translate(rgn, delta.x, delta.y);
- }
-
- void rfb::Region::assign_intersect(const rfb::Region& r) {
- pixman_region_intersect(rgn, rgn, r.rgn);
- }
-
- void rfb::Region::assign_union(const rfb::Region& r) {
- pixman_region_union(rgn, rgn, r.rgn);
- }
-
- void rfb::Region::assign_subtract(const rfb::Region& r) {
- pixman_region_subtract(rgn, rgn, r.rgn);
- }
-
- rfb::Region rfb::Region::intersect(const rfb::Region& r) const {
- rfb::Region ret;
- pixman_region_intersect(ret.rgn, rgn, r.rgn);
- return ret;
- }
-
- rfb::Region rfb::Region::union_(const rfb::Region& r) const {
- rfb::Region ret;
- pixman_region_union(ret.rgn, rgn, r.rgn);
- return ret;
- }
-
- rfb::Region rfb::Region::subtract(const rfb::Region& r) const {
- rfb::Region ret;
- pixman_region_subtract(ret.rgn, rgn, r.rgn);
- return ret;
- }
-
- bool rfb::Region::equals(const rfb::Region& r) const {
- return pixman_region_equal(rgn, r.rgn);
- }
-
- int rfb::Region::numRects() const {
- return pixman_region_n_rects(rgn);
- }
-
- bool rfb::Region::get_rects(std::vector<Rect>* rects,
- bool left2right, bool topdown) const
- {
- int nRects;
- const pixman_box16_t* boxes;
- int xInc, yInc, i;
-
- boxes = pixman_region_rectangles(rgn, &nRects);
-
- rects->clear();
- rects->reserve(nRects);
-
- xInc = left2right ? 1 : -1;
- yInc = topdown ? 1 : -1;
- i = topdown ? 0 : nRects-1;
-
- while (nRects > 0) {
- int firstInNextBand = i;
- int nRectsInBand = 0;
-
- while (nRects > 0 && boxes[firstInNextBand].y1 == boxes[i].y1)
- {
- firstInNextBand += yInc;
- nRects--;
- nRectsInBand++;
- }
-
- if (xInc != yInc)
- i = firstInNextBand - yInc;
-
- while (nRectsInBand > 0) {
- Rect r(boxes[i].x1, boxes[i].y1, boxes[i].x2, boxes[i].y2);
- rects->push_back(r);
- i += xInc;
- nRectsInBand--;
- }
-
- i = firstInNextBand;
- }
-
- return !rects->empty();
- }
-
- rfb::Rect rfb::Region::get_bounding_rect() const {
- const pixman_box16_t* extents;
- extents = pixman_region_extents(rgn);
- return Rect(extents->x1, extents->y1, extents->x2, extents->y2);
- }
-
-
- void rfb::Region::debug_print(const char* prefix) const
- {
- Rect extents;
- std::vector<Rect> rects;
- std::vector<Rect>::const_iterator iter;
-
- extents = get_bounding_rect();
- get_rects(&rects);
-
- vlog.debug("%s num rects %3ld extents %3d,%3d %3dx%3d",
- prefix, (long)rects.size(), extents.tl.x, extents.tl.y,
- extents.width(), extents.height());
-
- for (iter = rects.begin(); iter != rects.end(); ++iter) {
- vlog.debug(" rect %3d,%3d %3dx%3d",
- iter->tl.x, iter->tl.y, iter->width(), iter->height());
- }
- }
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