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/**************************************************************************
*
* Copyright 2008-2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
/*
* Image I/O.
*/
#pragma once
#include <iostream>
#include <string>
namespace image {
enum ChannelType {
TYPE_UNORM8 = 0,
TYPE_FLOAT
};
class Image {
public:
unsigned width;
unsigned height;
unsigned channels;
ChannelType channelType;
unsigned bytesPerChannel;
unsigned bytesPerPixel;
// Flipped vertically or not
bool flipped;
// Pixels in RGBA format
unsigned char *pixels;
std::string label;
inline Image(unsigned w, unsigned h, unsigned c = 4, bool f = false, ChannelType t = TYPE_UNORM8) :
width(w),
height(h),
channels(c),
channelType(t),
bytesPerChannel(t == TYPE_FLOAT ? 4 : 1),
bytesPerPixel(channels * bytesPerChannel),
flipped(f),
pixels(new unsigned char[h*w*bytesPerPixel])
{}
inline ~Image() {
delete [] pixels;
}
// Absolute stride
inline unsigned
_stride() const {
return width*bytesPerPixel;
}
inline unsigned char *start(void) {
return flipped ? pixels + (height - 1)*_stride() : pixels;
}
inline const unsigned char *start(void) const {
return flipped ? pixels + (height - 1)*_stride() : pixels;
}
inline unsigned char *end(void) {
return flipped ? pixels - _stride() : pixels + height*_stride();
}
inline const unsigned char *end(void) const {
return flipped ? pixels - _stride() : pixels + height*_stride();
}
inline signed stride(void) const {
return flipped ? -(signed)_stride() : _stride();
}
bool
writeBMP(const char *filename) const;
void
writePNM(std::ostream &os, const char *comment = NULL) const;
bool
writePNM(const char *filename, const char *comment = NULL) const;
void
writeMD5(std::ostream &os) const;
bool
writePNG(std::ostream &os, bool strip_alpha = false) const;
bool
writePNG(const char *filename, bool strip_alpha = false) const;
void
writeRAW(std::ostream &os) const;
bool
writeRAW(const char *filename) const;
};
Image *
readPNG(std::istream &is);
Image *
readPNG(const char *filename);
struct PNMInfo
{
unsigned width;
unsigned height;
unsigned channels;
ChannelType channelType;
int commentNumber;
};
const char *
readPNMHeader(const char *buffer, size_t size, PNMInfo &info);
Image *
readPNM(const char *buffer, size_t bufferSize);
} /* namespace image */
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