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/* 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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