Texture Atlas Maker

#ifndef _PVRHEADER_H_INCLUDED_
#define _PVRHEADER_H_INCLUDED_

const int PVR_HEADER_SIZE = 13*4;

const unsigned int PVRTEX_MIPMAP		= (1<<8);		// has mip map levels
const unsigned int PVRTEX_TWIDDLE		= (1<<9);		// is twiddled
const unsigned int PVRTEX_BUMPMAP		= (1<<10);		// has normals encoded for a bump map
const unsigned int PVRTEX_TILING		= (1<<11);		// is bordered for tiled pvr
const unsigned int PVRTEX_CUBEMAP		= (1<<12);		// is a cubemap/skybox
const unsigned int PVRTEX_FALSEMIPCOL	= (1<<13);		//
const unsigned int PVRTEX_VOLUME		= (1<<14);
const unsigned int PVRTEX_PIXELTYPE		= 0xff;			// pixel type is always in the last 16bits of the flags
const unsigned int PVRTEX_IDENTIFIER	= 0x21525650;	// the pvr identifier is the characters 'P','V','R'

const unsigned int PVRTEX_V1_HEADER_SIZE = 44;			// old header size was 44 for identification purposes

const unsigned int PVRTC2_MIN_TEXWIDTH		= 16;
const unsigned int PVRTC2_MIN_TEXHEIGHT		= 8;
const unsigned int PVRTC4_MIN_TEXWIDTH		= 8;
const unsigned int PVRTC4_MIN_TEXHEIGHT		= 8;
const unsigned int ETC_MIN_TEXWIDTH			= 4;
const unsigned int ETC_MIN_TEXHEIGHT		= 4;
const unsigned int DXT_MIN_TEXWIDTH			= 4;
const unsigned int DXT_MIN_TEXHEIGHT		= 4;

/*
	GL_IMG_texture_compression_pvrtc
*/
/* Tokens */
#define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG			0x8C00
#define GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG			0x8C01
#define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG			0x8C02
#define GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG			0x8C03

	enum PixelType
	{
		MGLPT_ARGB_4444 = 0x00,
		MGLPT_ARGB_1555,
		MGLPT_RGB_565,
		MGLPT_RGB_555,
		MGLPT_RGB_888,
		MGLPT_ARGB_8888,
		MGLPT_ARGB_8332,
		MGLPT_I_8,
		MGLPT_AI_88,
		MGLPT_1_BPP,
		MGLPT_VY1UY0,
		MGLPT_Y1VY0U,
		MGLPT_PVRTC2,
		MGLPT_PVRTC4,
		MGLPT_PVRTC2_2,
		MGLPT_PVRTC2_4,

		OGL_RGBA_4444= 0x10,
		OGL_RGBA_5551,
		OGL_RGBA_8888,
		OGL_RGB_565,
		OGL_RGB_555,
		OGL_RGB_888,
		OGL_I_8,
		OGL_AI_88,
		OGL_PVRTC2,
		OGL_PVRTC4,

		// OGL_BGRA_8888 extension
		OGL_BGRA_8888,

		// max cap for iterating
		END_OF_PIXEL_TYPES,

		MGLPT_NOTYPE = 0xff

	};



class PVRHeader
{
public:
	PVRHeader();
	~PVRHeader();
	FILE* LoadHeader(const string& fileName);
	int m_headerSize;			/*!< size of the structure */
	int m_height;				/*!< height of surface to be created */
	int m_width;				/*!< width of input surface */
	int m_mipMapCount;			/*!< number of mip-map levels requested */
	int m_pfFlags;				/*!< pixel format flags */
	int m_textureDataSize;		/*!< Total size in bytes */
	int m_bitCount;			/*!< number of bits per pixel  */
	int m_rBitMask;			/*!< mask for red bit */
	int m_gBitMask;			/*!< mask for green bits */
	int m_bBitMask;			/*!< mask for blue bits */
	int m_alphaBitMask;		/*!< mask for alpha channel */
	int m_pvr;					/*!< magic number identifying pvr file */
	int m_numSurfs;			/*!< the number of surfaces present in the pvr */
};





#endif // _PVRHEADER_H_INCLUDED_