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Pixels.cpp
// This may look like C code, but it is really -*- C++ -*-
//
// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002, 2003
//
// Copyright @ 2013 ImageMagick Studio LLC, a non-profit organization
// dedicated to making software imaging solutions freely available.
//
// Pixels Implementation
//
#define MAGICKCORE_IMPLEMENTATION 1
#define MAGICK_PLUSPLUS_IMPLEMENTATION 1
#include <cstring>
#include "Magick++/Include.h"
#include <string> // This is here to compile with Visual C++
#include "Magick++/Thread.h"
#include "Magick++/Exception.h"
#include "Magick++/Pixels.h"
Magick::Pixels::Pixels(Magick::Image &image_)
: _image(image_),
_x(0),
_y(0),
_columns(0),
_rows(0)
{
GetPPException;
_view=AcquireVirtualCacheView(image_.image(),exceptionInfo),
ThrowPPException(image_.quiet());
}
Magick::Pixels::~Pixels(void)
{
if (_view)
_view=DestroyCacheView(_view);
}
Magick::Quantum* Magick::Pixels::get(const ssize_t x_,const ssize_t y_,
const size_t columns_,const size_t rows_)
{
_x=x_;
_y=y_;
_columns=columns_;
_rows=rows_;
GetPPException;
Quantum* pixels=GetCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
exceptionInfo);
ThrowPPException(_image.quiet());
return pixels;
}
const Magick::Quantum* Magick::Pixels::getConst(const ssize_t x_,
const ssize_t y_,const size_t columns_,const size_t rows_)
{
_x=x_;
_y=y_;
_columns=columns_;
_rows=rows_;
GetPPException;
const Quantum* pixels=GetCacheViewVirtualPixels(_view,x_,y_,columns_,rows_,
exceptionInfo);
ThrowPPException(_image.quiet());
return pixels;
}
ssize_t Magick::Pixels::offset(PixelChannel channel) const
{
if (_image.constImage()->channel_map[channel].traits == UndefinedPixelTrait)
return -1;
return _image.constImage()->channel_map[channel].offset;
}
Magick::Quantum* Magick::Pixels::set(const ssize_t x_,const ssize_t y_,
const size_t columns_,const size_t rows_)
{
_x=x_;
_y=y_;
_columns=columns_;
_rows=rows_;
GetPPException;
Quantum* pixels=QueueCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
exceptionInfo);
ThrowPPException(_image.quiet());
return pixels;
}
void Magick::Pixels::sync(void)
{
GetPPException;
(void) SyncCacheViewAuthenticPixels(_view,exceptionInfo);
ThrowPPException(_image.quiet());
}
// Return pixel meta content
void* Magick::Pixels::metacontent(void)
{
void* pixel_metacontent=GetCacheViewAuthenticMetacontent(_view);
return pixel_metacontent;
}
Magick::PixelData::PixelData(Magick::Image &image_,std::string map_,
const StorageType type_)
{
init(image_,0,0,image_.columns(),image_.rows(),map_,type_);
}
Magick::PixelData::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_)
{
init(image_,x_,y_,width_,height_,map_,type_);
}
Magick::PixelData::~PixelData(void)
{
relinquish();
}
const void *Magick::PixelData::data(void) const
{
return(_data);
}
::ssize_t Magick::PixelData::length(void) const
{
return(_length);
}
::ssize_t Magick::PixelData::size(void) const
{
return(_size);
}
void Magick::PixelData::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_)
{
size_t
size;
_data=(void *) NULL;
_length=0;
_size=0;
if ((x_ < 0) || (width_ == 0) || (y_ < 0) || (height_ == 0) ||
(x_ > (ssize_t) image_.columns()) || (((ssize_t) width_ + x_) > (ssize_t) image_.columns())
|| (y_ > (ssize_t) image_.rows()) || (((ssize_t) height_ + y_) > (ssize_t) image_.rows())
|| (map_.length() == 0))
return;
switch(type_)
{
case CharPixel:
size=sizeof(unsigned char);
break;
case DoublePixel:
size=sizeof(double);
break;
case FloatPixel:
size=sizeof(float);
break;
case LongPixel:
size=sizeof(unsigned int);
break;
case LongLongPixel:
size=sizeof(MagickSizeType);
break;
case QuantumPixel:
size=sizeof(Quantum);
break;
case ShortPixel:
size=sizeof(unsigned short);
break;
default:
throwExceptionExplicit(MagickCore::OptionError,"Invalid type");
return;
}
_length=(ssize_t) (width_*height_*map_.length());
_size=_length*(ssize_t) size;
_data=AcquireMagickMemory((size_t) _size);
GetPPException;
MagickCore::ExportImagePixels(image_.image(),x_,y_,width_,height_,
map_.c_str(),type_,_data,exceptionInfo);
if (exceptionInfo->severity != MagickCore::UndefinedException)
relinquish();
ThrowPPException(image_.quiet());
}
void Magick::PixelData::relinquish(void) throw()
{
if (_data != (void *)NULL)
_data=RelinquishMagickMemory(_data);
_length=0;
_size=0;
}
Magick::Image
Definition Image.h:56