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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2000-2002 by Denton Woods
// Last modified: 05/18/2002 <--Y2K Compliant! =]
//
// Filename: src-IL/include/il_gif.h
//
// Description: Reads from a Graphics Interchange Format (.gif) file.
//
//-----------------------------------------------------------------------------
#ifndef GIF_H
#define GIF_H
#include "il_internal.h"
#define GIF87A 87
#define GIF89A 89
#ifdef _WIN32
#pragma pack(push, gif_struct, 1)
#endif
typedef struct GIFHEAD
{
char Sig[6];
ILushort Width;
ILushort Height;
ILubyte ColourInfo;
ILubyte Background;
ILubyte Aspect;
} IL_PACKSTRUCT GIFHEAD;
typedef struct IMAGEDESC
{
ILubyte Separator;
ILushort OffX;
ILushort OffY;
ILushort Width;
ILushort Height;
ILubyte ImageInfo;
} IL_PACKSTRUCT IMAGEDESC;
typedef struct GFXCONTROL
{
ILubyte Size;
ILubyte Packed;
ILushort Delay;
ILubyte Transparent;
ILubyte Terminator;
ILboolean Used; //this stores if a gfxcontrol was read - it is IL_FALSE (!)
//if a gfxcontrol was read from the file, IL_TRUE otherwise
} IL_PACKSTRUCT GFXCONTROL;
#ifdef _WIN32
#pragma pack(pop, gif_struct)
#endif
// Internal functions
ILboolean iLoadGifInternal(ILvoid);
ILboolean ilLoadGifF(ILHANDLE File);
ILboolean iIsValidGif(ILvoid);
ILboolean iGetPalette(ILubyte Info, ILpal *Pal);
ILboolean GetImages(ILpal *GlobalPal, GIFHEAD *GifHead);
ILboolean SkipExtensions(GFXCONTROL *Gfx);
ILboolean GifGetData(ILubyte *Data, ILuint ImageSize, ILuint Width, ILuint Height, ILuint Stride, GFXCONTROL *Gfx);
ILboolean RemoveInterlace(ILimage *image);
ILboolean iCopyPalette(ILpal *Dest, ILpal *Src);
ILboolean ConvertTransparent(ILimage *Image, ILubyte TransColour);
#endif//GIF_H
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