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Pixels.h
// This may look like C code, but it is really -*- C++ -*-
//
// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002
//
// Copyright @ 2014 ImageMagick Studio LLC, a non-profit organization
// dedicated to making software imaging solutions freely available.
//
// Representation of a pixel view.
//
#if !defined(Magick_Pixels_header)
#define Magick_Pixels_header
#include "Magick++/Include.h"
#include "Magick++/Color.h"
#include "Magick++/Image.h"
namespace Magick
{
class MagickPPExport Pixels
{
public:
// Construct pixel view using specified image.
Pixels(Magick::Image &image_);
// Destroy pixel view
~Pixels(void);
// Transfer pixels from the image to the pixel view as defined by
// the specified region. Modified pixels may be subsequently
// transferred back to the image via sync.
Quantum *get(const ::ssize_t x_,const ::ssize_t y_,
const size_t columns_,const size_t rows_);
// Transfer read-only pixels from the image to the pixel view as
// defined by the specified region.
const Quantum *getConst(const ::ssize_t x_,const ::ssize_t y_,
const size_t columns_,const size_t rows_);
// Return pixel metacontent
void *metacontent(void);
// Returns the offset for the specified channel.
ssize_t offset(PixelChannel channel) const;
// Allocate a pixel view region to store image pixels as defined
// by the region rectangle. This area is subsequently transferred
// from the pixel view to the image via sync.
Quantum *set(const ::ssize_t x_,const ::ssize_t y_,const size_t columns_,
const size_t rows_ );
// Transfers the image view pixels to the image.
void sync(void);
// Left ordinate of view
::ssize_t x(void) const;
// Top ordinate of view
::ssize_t y(void) const;
// Width of view
size_t columns(void) const;
// Height of view
size_t rows(void) const;
private:
// Copying and assigning Pixels is not supported.
Pixels(const Pixels& pixels_);
const Pixels& operator=(const Pixels& pixels_);
Magick::Image _image; // Image reference
MagickCore::CacheView *_view; // Image view handle
::ssize_t _x; // Left ordinate of view
::ssize_t _y; // Top ordinate of view
size_t _columns; // Width of view
size_t _rows; // Height of view
}; // class Pixels
class MagickPPExport PixelData
{
public:
// Construct pixel data using specified image
PixelData(Magick::Image &image_,std::string map_,const StorageType type_);
// Construct pixel data using specified image
PixelData(Magick::Image &image_,const ::ssize_t x_,const ::ssize_t y_,
const size_t width_,const size_t height_,std::string map_,
const StorageType type_);
// Destroy pixel data
~PixelData(void);
// Pixel data buffer
const void *data(void) const;
// Length of the buffer
::ssize_t length(void) const;
// Size of the buffer in bytes
::ssize_t size(void) const;
private:
// Copying and assigning PixelData is not supported
PixelData(const PixelData& pixels_);
const PixelData& operator=(const PixelData& pixels_);
void init(Magick::Image &image_,const ::ssize_t x_,const ::ssize_t y_,
const size_t width_,const size_t height_,std::string map_,
const StorageType type_);
void relinquish(void) throw();
void *_data; // The pixel data
::ssize_t _length; // Length of the data
::ssize_t _size; // Size of the data
}; // class PixelData
} // Magick namespace
//
// Inline methods
//
// Left ordinate of view
inline ::ssize_t Magick::Pixels::x(void) const
{
return _x;
}
// Top ordinate of view
inline ::ssize_t Magick::Pixels::y(void) const
{
return _y;
}
// Width of view
inline size_t Magick::Pixels::columns(void) const
{
return _columns;
}
// Height of view
inline size_t Magick::Pixels::rows(void) const
{
return _rows;
}
#endif // Magick_Pixels_header
Magick::Image
Definition Image.h:56