/* RageTextureID - An identifier for a texture and associated loading parameters. */

#ifndef RAGE_TEXTURE_ID_H
#define RAGE_TEXTURE_ID_H

/* A unique texture is identified by a RageTextureID.  (Loading the
 * same file with two different dither settings is considered two
 * different textures, for example.)  See RageTexture.cpp for explanations
 * of these. */
struct RageTextureID
{
	RString filename;

	// Maximum size of the texture, per dimension.
	int iMaxSize;

	// Generate mipmaps for this texture
	bool bMipMaps;

	/* Maximum number of bits for alpha.  In 16-bit modes, lowering
	 * this gives more bits for color values. (0, 1 or 4) */
	int iAlphaBits;

	/* If this is greater than -1, then the image will be loaded as a luma/alpha
	 * map, eg. I4A4.  At most 8 bits per pixel will be used  This only actually happens
	 * when paletted textures are supported.
	 *
	 * If the sum of alpha and grayscale bits is <= 4, and the system supports 4-bit
	 * palettes, then the image will be loaded with 4bpp.
	 *
	 * This may be set to 0, resulting in an alpha map with all pixels white. */
	int iGrayscaleBits;

	/* Preferred color depth of the image. (This is overridden for
	 * paletted images and transparencies.)  -1 for default. */
	int iColorDepth;

	// If true and color precision is being lost, dither. (slow)
	bool bDither;

	// If true, resize the image to fill the internal texture. (slow) 
	bool bStretch;

	/* If true, enable HOT PINK color keying. (deprecated but needed for
	 * banners) */
	bool bHotPinkColorKey; // #FF00FF

	// These hints will be used in addition to any in the filename.
	RString AdditionalTextureHints;

	/* Used by RageTextureManager. Order is important; see RageTextureManager.cpp.
	 * Note that this property is not considered for ordering/equality. Loading
	 * a texture with a different loading policy will reuse the same texture with
	 * a different policy. */
	enum TexPolicy { TEX_VOLATILE, TEX_DEFAULT } Policy;

	void Init();

	RageTextureID(): filename(RString()), iMaxSize(0), bMipMaps(false),
		iAlphaBits(0), iGrayscaleBits(0), iColorDepth(0),
		bDither(false), bStretch(false), bHotPinkColorKey(false),
		AdditionalTextureHints(RString()), Policy(TEX_DEFAULT)  { Init(); }
	RageTextureID( const RString &fn ): filename(RString()), iMaxSize(0),
		bMipMaps(false), iAlphaBits(0), iGrayscaleBits(0),
		iColorDepth(0), bDither(false), bStretch(false),
		bHotPinkColorKey(false), AdditionalTextureHints(RString()),
		Policy(TEX_DEFAULT) { Init(); SetFilename(fn); }
	void SetFilename( const RString &fn );
};

inline bool operator==(RageTextureID const &lhs, RageTextureID const &rhs)
{
#define EQUAL(a) (lhs.a==rhs.a)
  return
		EQUAL(filename) &&
		EQUAL(iMaxSize) &&
		EQUAL(bMipMaps) &&
		EQUAL(iAlphaBits) &&
		EQUAL(iGrayscaleBits) &&
		EQUAL(iColorDepth) &&
		EQUAL(bDither) &&
		EQUAL(bStretch) &&
		EQUAL(bHotPinkColorKey) &&
		EQUAL(AdditionalTextureHints);
		// EQUAL(Policy); // don't do this
#undef EQUAL
}

inline bool operator!=(RageTextureID const &lhs, RageTextureID const &rhs)
{
  return !operator==(lhs, rhs);
}

inline bool operator<(RageTextureID const &lhs, RageTextureID const &rhs)
{
#define COMP(a) if(lhs.a<rhs.a) return true; if(lhs.a>rhs.a) return false;
  COMP(filename);
  COMP(iMaxSize);
  COMP(bMipMaps);
  COMP(iAlphaBits);
  COMP(iGrayscaleBits);
  COMP(iColorDepth);
  COMP(bDither);
  COMP(bStretch);
  COMP(bHotPinkColorKey);
  COMP(AdditionalTextureHints);
  // COMP(Policy); // don't do this
#undef COMP
  return false;
}

inline bool operator>(RageTextureID const &lhs, RageTextureID const &rhs)
{
  return operator<(rhs, lhs);
}
inline bool operator<=(RageTextureID const &lhs, RageTextureID const &rhs)
{
  return !operator<(rhs, lhs);
}
inline bool operator>=(RageTextureID const &lhs, RageTextureID const &rhs)
{
  return !operator<(lhs, rhs);
}

#endif

/*
 * Copyright (c) 2003-2004 Chris Danford, Glenn Maynard
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */