irrlicht/source/Irrlicht/CImageLoaderTGA.h

// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#pragma once

#include "IImageLoader.h"


namespace irr
{
namespace video
{

// byte-align structures
#include "irrpack.h"

	// these structs are also used in the TGA writer
	struct STGAHeader{
		u8 IdLength;
		u8 ColorMapType;
		u8 ImageType;
		u8 FirstEntryIndex[2];
		u16 ColorMapLength;
		u8 ColorMapEntrySize;
		u8 XOrigin[2];
		u8 YOrigin[2];
		u16 ImageWidth;
		u16 ImageHeight;
		u8 PixelDepth;
		u8 ImageDescriptor;
	} PACK_STRUCT;

	struct STGAFooter
	{
		u32 ExtensionOffset;
		u32 DeveloperOffset;
		c8  Signature[18];
	} PACK_STRUCT;

// Default alignment
#include "irrunpack.h"

/*!
	Surface Loader for targa images
*/
class CImageLoaderTGA : public IImageLoader
{
public:

	//! returns true if the file maybe is able to be loaded by this class
	//! based on the file extension (e.g. ".tga")
	bool isALoadableFileExtension(const io::path& filename) const override;

	//! returns true if the file maybe is able to be loaded by this class
	bool isALoadableFileFormat(io::IReadFile* file) const override;

	//! creates a surface from the file
	IImage* loadImage(io::IReadFile* file) const override;

private:

	//! loads a compressed tga. Was written and sent in by Jon Pry, thank you very much!
	u8* loadCompressedImage(io::IReadFile *file, const STGAHeader& header) const;
};

} // end namespace video
} // end namespace irr