imfheader.cpp

对gif

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// *       Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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///////////////////////////////////////////////////////////////////////////



//-----------------------------------------------------------------------------
//
//	class Header
//
//-----------------------------------------------------------------------------

#include <ImfHeader.h>
#include <ImfStdIO.h>
#include <ImfVersion.h>
#include <ImfCompressor.h>
#include <ImfMisc.h>
#include <ImfBoxAttribute.h>
#include <ImfChannelListAttribute.h>
#include <ImfChromaticitiesAttribute.h>
#include <ImfCompressionAttribute.h>
#include <ImfDoubleAttribute.h>
#include <ImfEnvmapAttribute.h>
#include <ImfFloatAttribute.h>
#include <ImfIntAttribute.h>
#include <ImfKeyCodeAttribute.h>
#include <ImfLineOrderAttribute.h>
#include <ImfMatrixAttribute.h>
#include <ImfOpaqueAttribute.h>
#include <ImfPreviewImageAttribute.h>
#include <ImfRationalAttribute.h>
#include <ImfStringAttribute.h>
#include <ImfTileDescriptionAttribute.h>
#include <ImfTimeCodeAttribute.h>
#include <ImfVecAttribute.h>
#include "IlmThreadMutex.h"
#include "Iex.h"
#include <sstream>
#include <stdlib.h>
#include <time.h>


namespace Imf {

using Imath::Box2i;
using Imath::V2i;
using Imath::V2f;
using IlmThread::Mutex;
using IlmThread::Lock;


namespace {

int maxImageWidth = 0;
int maxImageHeight = 0;
int maxTileWidth = 0;
int maxTileHeight = 0;


void
initialize (Header &header,
	    const Box2i &displayWindow,
	    const Box2i &dataWindow,
	    float pixelAspectRatio,
	    const V2f &screenWindowCenter,
	    float screenWindowWidth,
	    LineOrder lineOrder,
	    Compression compression)
{
    header.insert ("displayWindow", Box2iAttribute (displayWindow));
    header.insert ("dataWindow", Box2iAttribute (dataWindow));
    header.insert ("pixelAspectRatio", FloatAttribute (pixelAspectRatio));
    header.insert ("screenWindowCenter", V2fAttribute (screenWindowCenter));
    header.insert ("screenWindowWidth", FloatAttribute (screenWindowWidth));
    header.insert ("lineOrder", LineOrderAttribute (lineOrder));
    header.insert ("compression", CompressionAttribute (compression));
    header.insert ("channels", ChannelListAttribute ());
}

} // namespace


Header::Header (int width,
		int height,
		float pixelAspectRatio,
		const V2f &screenWindowCenter,
		float screenWindowWidth,
		LineOrder lineOrder,
		Compression compression)
:
    _map()
{
    staticInitialize();

    Box2i displayWindow (V2i (0, 0), V2i (width - 1, height - 1));

    initialize (*this,
		displayWindow,
		displayWindow,
		pixelAspectRatio,
		screenWindowCenter,
		screenWindowWidth,
		lineOrder,
		compression);
}


Header::Header (int width,
		int height,
		const Box2i &dataWindow,
		float pixelAspectRatio,
		const V2f &screenWindowCenter,
		float screenWindowWidth,
		LineOrder lineOrder,
		Compression compression)
:
    _map()
{
    staticInitialize();

    Box2i displayWindow (V2i (0, 0), V2i (width - 1, height - 1));

    initialize (*this,
		displayWindow,
		dataWindow,
		pixelAspectRatio,
		screenWindowCenter,
		screenWindowWidth,
		lineOrder,
		compression);
}


Header::Header (const Box2i &displayWindow,
		const Box2i &dataWindow,
		float pixelAspectRatio,
		const V2f &screenWindowCenter,
		float screenWindowWidth,
		LineOrder lineOrder,
		Compression compression)
:
    _map()
{
    staticInitialize();

    initialize (*this,
		displayWindow,
		dataWindow,
		pixelAspectRatio,
		screenWindowCenter,
		screenWindowWidth,
		lineOrder,
		compression);
}


Header::Header (const Header &other): _map()
{
    for (AttributeMap::const_iterator i = other._map.begin();
	 i != other._map.end();
	 ++i)
    {
	insert (*i->first, *i->second);
    }
}


Header::~Header ()
{
    for (AttributeMap::iterator i = _map.begin();
	 i != _map.end();
	 ++i)
    {
	 delete i->second;
    }
}


Header &		
Header::operator = (const Header &other)
{
    if (this != &other)
    {
	for (AttributeMap::iterator i = _map.begin();
	     i != _map.end();
	     ++i)
	{
	     delete i->second;
	}

	_map.erase (_map.begin(), _map.end());

	for (AttributeMap::const_iterator i = other._map.begin();
	     i != other._map.end();
	     ++i)
	{
	    insert (*i->first, *i->second);
	}
    }

    return *this;
}


void
Header::insert (const char name[], const Attribute &attribute)
{
    if (name[0] == 0)
	THROW (Iex::ArgExc, "Image attribute name cannot be an empty string.");

    AttributeMap::iterator i = _map.find (name);

    if (i == _map.end())
    {
	Attribute *tmp = attribute.copy();

	try
	{
	    _map[name] = tmp;
	}
	catch (...)
	{
	    delete tmp;
	    throw;
	}
    }
    else
    {
	if (strcmp (i->second->typeName(), attribute.typeName()))
	    THROW (Iex::TypeExc, "Cannot assign a value of "
				 "type \"" << attribute.typeName() << "\" "
				 "to image attribute \"" << name << "\" of "
				 "type \"" << i->second->typeName() << "\".");

	Attribute *tmp = attribute.copy();
	delete i->second;
	i->second = tmp;
    }
}


Attribute &		
Header::operator [] (const char name[])
{
    AttributeMap::iterator i = _map.find (name);

    if (i == _map.end())
	THROW (Iex::ArgExc, "Cannot find image attribute \"" << name << "\".");

    return *i->second;
}


const Attribute &	
Header::operator [] (const char name[]) const
{
    AttributeMap::const_iterator i = _map.find (name);

    if (i == _map.end())
	THROW (Iex::ArgExc, "Cannot find image attribute \"" << name << "\".");

    return *i->second;
}


Header::Iterator
Header::begin ()
{
    return _map.begin();
}


Header::ConstIterator
Header::begin () const
{
    return _map.begin();
}


Header::Iterator
Header::end ()
{
    return _map.end();
}


Header::ConstIterator
Header::end () const
{
    return _map.end();
}


Header::Iterator
Header::find (const char name[])
{
    return _map.find (name);
}


Header::ConstIterator
Header::find (const char name[]) const
{
    return _map.find (name);
}


Imath::Box2i &	
Header::displayWindow ()
{
    return static_cast <Box2iAttribute &>
	((*this)["displayWindow"]).value();
}


const Imath::Box2i &
Header::displayWindow () const
{
    return static_cast <const Box2iAttribute &>
	((*this)["displayWindow"]).value();
}

Imath::Box2i &	
Header::dataWindow ()
{
    return static_cast <Box2iAttribute &>
	((*this)["dataWindow"]).value();
}


const Imath::Box2i &
Header::dataWindow () const
{
    return static_cast <const Box2iAttribute &>
	((*this)["dataWindow"]).value();
}


float &		
Header::pixelAspectRatio ()
{
    return static_cast <FloatAttribute &>
	((*this)["pixelAspectRatio"]).value();
}


const float &	
Header::pixelAspectRatio () const
{
    return static_cast <const FloatAttribute &>
	((*this)["pixelAspectRatio"]).value();
}


Imath::V2f &	
Header::screenWindowCenter ()
{
    return static_cast <V2fAttribute &>
	((*this)["screenWindowCenter"]).value();
}


const Imath::V2f &	
Header::screenWindowCenter () const
{
    return static_cast <const V2fAttribute &>
	((*this)["screenWindowCenter"]).value();
}


float &		
Header::screenWindowWidth ()
{
    return static_cast <FloatAttribute &>
	((*this)["screenWindowWidth"]).value();
}


const float &	
Header::screenWindowWidth () const
{
    return static_cast <const FloatAttribute &>
	((*this)["screenWindowWidth"]).value();
}


ChannelList &	
Header::channels ()
{
    return static_cast <ChannelListAttribute &>
	((*this)["channels"]).value();
}


const ChannelList &	
Header::channels () const
{
    return static_cast <const ChannelListAttribute &>
	((*this)["channels"]).value();
}


LineOrder &
Header::lineOrder ()
{
    return static_cast <LineOrderAttribute &>
	((*this)["lineOrder"]).value();
}


const LineOrder &
Header::lineOrder () const
{
    return static_cast <const LineOrderAttribute &>
	((*this)["lineOrder"]).value();
}


Compression &
Header::compression ()
{
    return static_cast <CompressionAttribute &>
	((*this)["compression"]).value();
}


const Compression &
Header::compression () const
{
    return static_cast <const CompressionAttribute &>
	((*this)["compression"]).value();
}


void
Header::setTileDescription(const TileDescription& td)
{
    insert ("tiles", TileDescriptionAttribute (td));
}


bool
Header::hasTileDescription() const
{
    return findTypedAttribute <TileDescriptionAttribute> ("tiles") != 0;
}


TileDescription &
Header::tileDescription ()
{
    return typedAttribute <TileDescriptionAttribute> ("tiles").value();
}


const TileDescription &
Header::tileDescription () const
{
    return typedAttribute <TileDescriptionAttribute> ("tiles").value();
}

void		
Header::setPreviewImage (const PreviewImage &pi)
{
    insert ("preview", PreviewImageAttribute (pi));
}


PreviewImage &
Header::previewImage ()
{
    return typedAttribute <PreviewImageAttribute> ("preview").value();