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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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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 <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)
{
Resource rc(filename);
load(rc.data(), rc.size());
}
Image::~Image()
{
std::free(image_data);
}
void Image::setError()
{
Resource rc(":png_error");
const unsigned char* p = (const unsigned char*)rc.data();
std::uint32_t iw, ih;
std::memcpy(&iw, p, sizeof(uint32_t));
p += sizeof(uint32_t);
std::memcpy(&ih, p, sizeof(uint32_t));
p += sizeof(uint32_t);
_width = iw;
_height = ih;
size_t image_size = rc.size() - (sizeof(iw) + sizeof(ih));
image_data = (unsigned char*)std::malloc(image_size);
memcpy(image_data, p, image_size);
}
void Image::load(const char* data, size_t size)
{
unsigned int iw, ih;
unsigned int res = lodepng_decode32((unsigned char**)&image_data,
&iw, &ih,
(const unsigned char*)data, size);
_width = iw;
_height = ih;
if(res != 0)
{
ERR(image, "Error in lodepng_decode32: %d", res);
setError();
return;
}
}
size_t Image::width() const
{
return _width;
}
size_t Image::height() const
{
return _height;
}
Colour Image::getPixel(size_t x, size_t y) const
{
if(x > _width || y > _height)
{
return Colour(0,0,0,0);
}
unsigned char* ptr = &image_data[(x + y * width()) * 4];
float r = ptr[0];
float g = ptr[1];
float b = ptr[2];
float a = ptr[3];
Colour c(r / 255.0, g / 255.0, b / 255.0, a / 255.0);
return c;
}
} // GUI::
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