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100 lines
1.8 KiB
C++
100 lines
1.8 KiB
C++
// Clip Library
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// Copyright (c) 2015-2022 David Capello
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//
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// This file is released under the terms of the MIT license.
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// Read LICENSE.txt for more information.
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#include "clip.h"
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namespace clip {
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unsigned long image_spec::required_data_size() const
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{
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unsigned long n = (bytes_per_row * height);
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// For 24bpp we add some extra space to access the last pixel (3
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// bytes) as an uint32_t
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if (bits_per_pixel == 24) {
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if ((n % 4) > 0)
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n += 4 - (n % 4);
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else
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++n;
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}
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return n;
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}
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image::image()
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: m_own_data(false),
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m_data(nullptr)
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{
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}
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image::image(const image_spec& spec)
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: m_own_data(true),
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m_data(new char[spec.required_data_size()]),
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m_spec(spec) {
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}
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image::image(const void* data, const image_spec& spec)
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: m_own_data(false),
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m_data((char*)data),
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m_spec(spec) {
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}
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image::image(const image& image)
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: m_own_data(false),
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m_data(nullptr),
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m_spec(image.m_spec) {
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copy_image(image);
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}
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image::image(image&& image)
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: m_own_data(false),
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m_data(nullptr) {
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move_image(std::move(image));
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}
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image::~image() {
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reset();
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}
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image& image::operator=(const image& image) {
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copy_image(image);
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return *this;
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}
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image& image::operator=(image&& image) {
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move_image(std::move(image));
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return *this;
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}
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void image::reset() {
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if (m_own_data) {
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delete[] m_data;
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m_own_data = false;
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m_data = nullptr;
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}
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}
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void image::copy_image(const image& image) {
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reset();
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m_spec = image.spec();
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std::size_t n = m_spec.required_data_size();
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m_own_data = true;
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m_data = new char[n];
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std::copy(image.data(),
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image.data()+n,
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m_data);
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}
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void image::move_image(image&& image) {
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std::swap(m_own_data, image.m_own_data);
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std::swap(m_data, image.m_data);
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std::swap(m_spec, image.m_spec);
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}
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} // namespace clip
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