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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* image.cc
*
* Sat Mar 16 15:05:09 CET 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "image.h"
#include <cstring>
#include <cstdint>
#include <cstdlib>
#include <cassert>
#include <hugin.hpp>
#include "resource.h"
#include "lodepng/lodepng.h"
namespace GUI
{
Image::Image(const char* data, size_t size)
{
load(data, size);
}
Image::Image(const std::string& filename)
: filename(filename)
{
Resource rc(filename);
if(!rc.valid())
{
setError();
return;
}
load(rc.data(), rc.size());
}
Image::Image(Image&& other)
: _width(other._width)
, _height(other._height)
, image_data(std::move(other.image_data))
, image_data_raw(std::move(other.image_data_raw))
, filename(other.filename)
{
other._width = 0;
other._height = 0;
}
Image::~Image()
{
}
Image& Image::operator=(Image&& other)
{
image_data.clear();
image_data = std::move(other.image_data);
image_data_raw.clear();
image_data_raw = std::move(other.image_data_raw);
_width = other._width;
_height = other._height;
valid = other.valid;
other._width = 0;
other._height = 0;
other.valid = false;
return *this;
}
void Image::setError()
{
valid = false;
Resource rc(":resources/png_error");
if(!rc.valid())
{
_width = _height = 0u;
return;
}
const unsigned char* ptr = (const unsigned char*)rc.data();
std::uint32_t iw, ih;
iw = (uint32_t) ptr[0] |
(uint32_t) ptr[1] << 8 |
(uint32_t) ptr[2] << 16 |
(uint32_t) ptr[3] << 24;
ptr += sizeof(uint32_t);
ih = (uint32_t) ptr[0] |
(uint32_t) ptr[1] << 8 |
(uint32_t) ptr[2] << 16 |
(uint32_t) ptr[3] << 24;
ptr += sizeof(uint32_t);
_width = iw;
_height = ih;
image_data.clear();
image_data.reserve(_width * _height);
image_data_raw.clear();
image_data_raw.reserve(_width * _height * 4);
memcpy(image_data_raw.data(), ptr, _height * _width);
for(std::size_t y = 0; y < _height; ++y)
{
for(std::size_t x = 0; x < _width; ++x)
{
image_data.emplace_back(Colour{ptr[0] / 255.0f, ptr[1] / 255.0f,
ptr[2] / 255.0f, ptr[3] / 255.0f});
}
}
assert(image_data.size() == (_width * _height));
}
void Image::load(const char* data, size_t size)
{
has_alpha = false;
unsigned int iw{0}, ih{0};
std::uint8_t* char_image_data{nullptr};
unsigned int res = lodepng_decode32((std::uint8_t**)&char_image_data,
&iw, &ih,
(const std::uint8_t*)data, size);
if(res != 0)
{
ERR(image, "Error in lodepng_decode32: %d while loading '%s'",
res, filename.c_str());
setError();
return;
}
_width = iw;
_height = ih;
image_data.clear();
image_data.reserve(_width * _height);
image_data_raw.clear();
image_data_raw.reserve(_width * _height * 4);
memcpy(image_data_raw.data(), char_image_data, _height * _width * 4);
for(std::size_t y = 0; y < _height; ++y)
{
for(std::size_t x = 0; x < _width; ++x)
{
std::uint8_t* ptr = &char_image_data[(x + y * _width) * 4];
image_data.emplace_back(Colour{ptr[0], ptr[1], ptr[2], ptr[3]});
has_alpha |= ptr[3] != 0xff;
}
}
assert(image_data.size() == (_width * _height));
std::free(char_image_data);
valid = true;
}
size_t Image::width() const
{
return _width;
}
size_t Image::height() const
{
return _height;
}
const Colour& Image::getPixel(size_t x, size_t y) const
{
if(x > _width || y > _height)
{
return out_of_range;
}
return image_data[x + y * _width];
}
const std::uint8_t* Image::line(std::size_t y, std::size_t x_offset) const
{
return image_data_raw.data() + y * _width * 4 + x_offset * 4;
}
bool Image::hasAlpha() const
{
return has_alpha;
}
bool Image::isValid() const
{
return valid;
}
} // GUI::
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