Image::XanDecoder Class Reference

#include <xan.h>

Inheritance diagram for Image::XanDecoder:

Public Member Functions
	XanDecoder (int width, int height, int bitsPerPixel)
const Graphics::Surface *	decodeFrame (Common::SeekableReadStream &stream) override
Graphics::PixelFormat	getPixelFormat () const override
bool	setOutputPixelFormat (const Graphics::PixelFormat &format) override
Public Member Functions inherited from Image::Codec
virtual bool	containsPalette () const
virtual const byte *	getPalette ()
virtual bool	hasDirtyPalette () const
virtual bool	canDither (DitherType type) const
virtual void	setDither (DitherType type, const byte *palette)
virtual void	setCodecAccuracy (CodecAccuracy accuracy)

Additional Inherited Members
Public Types inherited from Image::Codec
enum	DitherType { kDitherTypeUnknown, kDitherTypeVFW, kDitherTypeQT }
Static Public Member Functions inherited from Image::Codec
static byte *	createQuickTimeDitherTable (const byte *palette, uint colorCount)

Detailed Description

Xan image decoder. (fourcc Xxan)

Used by Crusader: No Regret AVI files

This code was created based on the multimedia wiki: https://wiki.multimedia.cx/index.php/Origin_Xan_Codec and ffmpeg's libavcodec/xxan.c. The ffmpeg code is LGPL2 licensed and Copyright (C) 2011 Konstantin Shishkov based on work by Mike Melanson.

A similar format is used in Wing Commander III (although not in an AVI container) and IV.

Member Function Documentation

decodeFrame()

const Graphics::Surface* Image::XanDecoder::decodeFrame ( Common::SeekableReadStream &  stream )

overridevirtual

Decode the frame for the given data and return a pointer to a surface containing the decoded frame.

Returns

a pointer to the decoded frame

Implements Image::Codec.

getPixelFormat()

Graphics::PixelFormat Image::XanDecoder::getPixelFormat ( ) const

inlineoverridevirtual

Get the format that the surface returned from decodeImage() will be in.

Implements Image::Codec.

setOutputPixelFormat()

bool Image::XanDecoder::setOutputPixelFormat ( const Graphics::PixelFormat &  format )

inlineoverridevirtual

Select the preferred format to use, for codecs where this is faster than converting the image afterwards. Returns true if supported, and false otherwise.

Reimplemented from Image::Codec.

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The documentation for this class was generated from the following file:

• image/codecs/xan.h