97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
/*
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* This file is part of RawTherapee.
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*
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* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
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*
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* RawTherapee is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* RawTherapee is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "alpha.h"
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namespace rtengine
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{
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Alpha::Alpha () {}
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Alpha::Alpha (int width, int height)
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{
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if (width > 0 && height > 0) {
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surface = Cairo::ImageSurface::create (Cairo::FORMAT_A8, width, height);
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}
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}
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/*
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Alpha::~Alpha () {
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surface->unreference();
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}
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*/
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void Alpha::setSize (int width, int height)
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{
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if (width > 0 && height > 0) {
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if (surface) {
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if (width != getWidth() && height != getHeight()) {
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surface.clear(); // does this delete the referenced object? Unreferencing doesn't work, since Cairo expect to have a non null refCount in the destructor!
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} else {
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return;
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}
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}
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surface = Cairo::ImageSurface::create (Cairo::FORMAT_A8, width, height);
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} else if (surface) {
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surface.clear();
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}
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}
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int Alpha::getWidth() const
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{
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if (surface) {
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return surface->get_width();
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}
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return -1;
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}
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int Alpha::getHeight() const
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{
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if (surface) {
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return surface->get_height();
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}
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return -1;
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}
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Cairo::RefPtr<Cairo::ImageSurface> Alpha::getSurface () const
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{
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return surface; // to be used in bitmap edition
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}
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unsigned char Alpha::operator () (unsigned row, unsigned col) const
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{
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return * (surface->get_data () + row * surface->get_width () + col);
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}
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unsigned char& Alpha::operator () (unsigned row, unsigned col)
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{
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return * (surface->get_data () + row * surface->get_width () + col);
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}
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unsigned char* Alpha::operator () (unsigned row) const
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{
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return surface->get_data () + row * surface->get_width ();
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}
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}
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