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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2000-2009 by Denton Woods
// Last modified: 03/07/2009
//
// Filename: src-IL/src/il_lif.c
//
// Description: Reads a Homeworld image.
//
//-----------------------------------------------------------------------------
#include "il_internal.h"
#ifndef IL_NO_LIF
#include "il_lif.h"
//! Checks if the file specified in FileName is a valid Lif file.
ILboolean ilIsValidLif(ILconst_string FileName)
{
ILHANDLE LifFile;
ILboolean bLif = IL_FALSE;
if (!iCheckExtension(FileName, IL_TEXT("lif"))) {
ilSetError(IL_INVALID_EXTENSION);
return bLif;
}
LifFile = iopenr(FileName);
if (LifFile == NULL) {
ilSetError(IL_COULD_NOT_OPEN_FILE);
return bLif;
}
bLif = ilIsValidLifF(LifFile);
icloser(LifFile);
return bLif;
}
//! Checks if the ILHANDLE contains a valid Lif file at the current position.
ILboolean ilIsValidLifF(ILHANDLE File)
{
ILuint FirstPos;
ILboolean bRet;
iSetInputFile(File);
FirstPos = itell();
bRet = iIsValidLif();
iseek(FirstPos, IL_SEEK_SET);
return bRet;
}
//! Checks if Lump is a valid Lif lump.
ILboolean ilIsValidLifL(const void *Lump, ILuint Size)
{
iSetInputLump(Lump, Size);
return iIsValidLif();
}
// Internal function used to get the Lif header from the current file.
ILboolean iGetLifHead(LIF_HEAD *Header)
{
iread(Header->Id, 1, 8);
Header->Version = GetLittleUInt();
Header->Flags = GetLittleUInt();
Header->Width = GetLittleUInt();
Header->Height = GetLittleUInt();
Header->PaletteCRC = GetLittleUInt();
Header->ImageCRC = GetLittleUInt();
Header->PalOffset = GetLittleUInt();
Header->TeamEffect0 = GetLittleUInt();
Header->TeamEffect1 = GetLittleUInt();
return IL_TRUE;
}
// Internal function to get the header and check it.
ILboolean iIsValidLif()
{
LIF_HEAD Head;
if (!iGetLifHead(&Head))
return IL_FALSE;
iseek(-(ILint)sizeof(LIF_HEAD), IL_SEEK_CUR);
return iCheckLif(&Head);
}
// Internal function used to check if the HEADER is a valid Lif header.
ILboolean iCheckLif(LIF_HEAD *Header)
{
if (Header->Version != 260 || Header->Flags != 50)
return IL_FALSE;
if (stricmp(Header->Id, "Willy 7"))
return IL_FALSE;
return IL_TRUE;
}
//! Reads a .Lif file
ILboolean ilLoadLif(ILconst_string FileName)
{
ILHANDLE LifFile;
ILboolean bLif = IL_FALSE;
LifFile = iopenr(FileName);
if (LifFile == NULL) {
ilSetError(IL_COULD_NOT_OPEN_FILE);
return bLif;
}
bLif = ilLoadLifF(LifFile);
icloser(LifFile);
return bLif;
}
//! Reads an already-opened .Lif file
ILboolean ilLoadLifF(ILHANDLE File)
{
ILuint FirstPos;
ILboolean bRet;
iSetInputFile(File);
FirstPos = itell();
bRet = iLoadLifInternal();
iseek(FirstPos, IL_SEEK_SET);
return bRet;
}
//! Reads from a memory "lump" that contains a .Lif
ILboolean ilLoadLifL(const void *Lump, ILuint Size)
{
iSetInputLump(Lump, Size);
return iLoadLifInternal();
}
ILboolean iLoadLifInternal()
{
LIF_HEAD LifHead;
ILuint i;
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
if (!iGetLifHead(&LifHead))
return IL_FALSE;
if (!ilTexImage(LifHead.Width, LifHead.Height, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL)) {
return IL_FALSE;
}
iCurImage->Origin = IL_ORIGIN_UPPER_LEFT;
iCurImage->Pal.Palette = (ILubyte*)ialloc(1024);
if (iCurImage->Pal.Palette == NULL)
return IL_FALSE;
iCurImage->Pal.PalSize = 1024;
iCurImage->Pal.PalType = IL_PAL_RGBA32;
if (iread(iCurImage->Data, LifHead.Width * LifHead.Height, 1) != 1)
return IL_FALSE;
if (iread(iCurImage->Pal.Palette, 1, 1024) != 1024)
return IL_FALSE;
// Each data offset is offset by -1, so we add one.
for (i = 0; i < iCurImage->SizeOfData; i++) {
iCurImage->Data[i]++;
}
return ilFixImage();
}
#endif//IL_NO_LIF
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