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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 <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdint.h>
#include <hugin.hpp>
#include "resource.h"
// http://blog.hammerian.net/2009/reading-png-images-from-memory/
#include "lodepng/lodepng.h"
GUI::Image::Image(const char* data, size_t size)
{
load(data, size);
}
GUI::Image::Image(std::string filename)
{
GUI::Resource rc(filename);
load(rc.data(), rc.size());
}
GUI::Image::~Image()
{
free(image_data);
}
void GUI::Image::setError(int err)
{
GUI::Resource rc(":png_error");
const unsigned char *p = (const unsigned char *)rc.data();
uint32_t iw, ih;
memcpy(&iw, p, sizeof(uint32_t)); p += sizeof(uint32_t);
memcpy(&ih, p, sizeof(uint32_t)); p += sizeof(uint32_t);
w = iw;
h = ih;
DEBUG(image, "w:%d, h:%d\n", (int)w, (int)h);
image_data = (unsigned char*)malloc(rc.size() - 8);
memcpy(image_data, p, rc.size() - 8);
}
void GUI::Image::load(const char* data, size_t size)
{
//unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h,
// const unsigned char* in, size_t insize);
unsigned iw, ih;
unsigned res = lodepng_decode32((unsigned char**)&image_data, &iw, &ih,
(const unsigned char*)data, size);
w = iw;
h = ih;
if(res != 0) {
ERR(image, "[read_png_file] Error during init_io");
setError(3);
return;
}
}
size_t GUI::Image::width()
{
return w;
}
size_t GUI::Image::height()
{
return h;
}
GUI::Colour GUI::Image::getPixel(size_t x, size_t y)
{
if(x > width() || y > height()) return GUI::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];
GUI::Colour c(r / 255.0,
g / 255.0,
b / 255.0,
a / 255.0);
return c;
}
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