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/*
* The Plain Old Data encapsulation of pixel, raster data.
* Copyright (C) 2005 - 2015 René Rebe
*
* This program 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; version 2. A copy of the GNU General
* Public License can be found in the file LICENSE.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANT-
* ABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* Alternatively, commercial licensing options are available from the
* copyright holder ExactCODE GmbH Germany.
*/
#include <string.h> // memcpy
#include <iostream>
#define DEPRECATED
#include "Image.hh"
#include "Codecs.hh"
Image::Image ()
: modified(false), meta_modified(false), xres(0), yres(0), codec(0), data(0), w(0), h(0), bps(0), spp(0), rowstride(0)
{
}
Image::Image (Image& other)
: modified(false), meta_modified(false), xres(0), yres(0), codec(0), data(0), w(0), h(0), bps(0), spp(0), rowstride(0)
{
operator= (other);
}
Image::~Image () {
// release attached codec
if (codec)
delete (codec); codec = 0;
// release POD
if (data)
free (data); data = 0;
}
void Image::copyMeta (const Image& other)
{
w = other.w;
h = other.h;
bps = other.bps;
spp = other.spp;
rowstride = other.rowstride;
xres = other.xres;
yres = other.yres;
}
Image& Image::operator= (const Image& other)
{
uint8_t* d = other.getRawData();
copyMeta (other);
resize (w, h, rowstride); // allocate
if (d && data) {
memcpy (data, d, stride() * h);
}
setRawData();
return *this;
}
void Image::copyTransferOwnership (Image& other)
{
copyMeta (other);
uint8_t* d = other.getRawData();
other.setRawDataWithoutDelete (0);
setRawData (d);
}
uint8_t* Image::getRawData () const {
// ask codec about it
if (!data && codec) {
Image* image = const_cast<Image*>(this);
codec->decodeNow (image);
if (data) // if data was added
image->modified = false;
}
return data;
}
uint8_t* Image::getRawDataEnd () const {
// we call getRawData as it might have to query the codec to actually load it
return getRawData() + h * stride();
}
void Image::setRawData () {
if (!modified) {
// DEBUG
// std::cerr << "Image modified" << std::endl;
modified = true;
}
}
void Image::setRawData (uint8_t* _data) {
if (_data != data && data) {
free (data);
data = 0;
}
// reuse:
setRawDataWithoutDelete (_data);
}
void Image::setRawDataWithoutDelete (uint8_t* _data) {
data = _data;
// reuse
setRawData ();
}
void Image::resize (int _w, int _h, unsigned _stride) {
std::swap(w, _w);
std::swap(h, _h);
std::swap(rowstride, _stride);
uint8_t* ptr = (uint8_t*)::realloc(data, stride() * h);
if (ptr) {
setRawDataWithoutDelete(ptr);
} else {
// if non-zero size
if (w * h != 0) {
// restore
w = _w;
h = _h;
rowstride = _stride;
throw std::bad_alloc();
}
}
}
void Image::realloc () {
if (!data)
return; // not yet loaded, delayed, no-op
#if !defined(__APPLE__)
resize(w, h); // realloc, supposed to shrink
#else
// the OS allocator may not shrink the buffer, though that may be important for the application, ...
uint8_t* newdata = (uint8_t*)malloc(stride() * h);
if (newdata) {
memcpy(newdata, data, stride() * h);
setRawData(newdata);
} else {
resize(w, h); // at least try realloc, ...
}
#endif
}
void Image::setDecoderID (const std::string& id) {
decoderID = id;
}
const std::string& Image::getDecoderID () {
return decoderID;
}
ImageCodec* Image::getCodec() {
return codec;
}
void Image::setCodec (ImageCodec* _codec) {
// do not reset, nor free when the same codec is re-sety
if (codec == _codec)
return;
// release attached codec
if (codec) {
delete (codec);
}
codec = _codec;
// at the moment the codec is attached the data recent, 0 on detach
if (codec) {
modified = meta_modified = false;
}
}
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