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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2000-2009 by Denton Woods
// Last modified: 03/07/2009
//
// Filename: src-IL/src/il_wal.c
//
// Description: Loads a Quake .wal texture.
//
//-----------------------------------------------------------------------------
#include "il_internal.h"
#ifndef IL_NO_WAL
#include "il_q2pal.h"
typedef struct WALHEAD
{
ILbyte FileName[32]; // Image name
ILuint Width; // Width of first image
ILuint Height; // Height of first image
ILuint Offsets[4]; // Offsets to image data
ILbyte AnimName[32]; // Name of next frame
ILuint Flags; // ??
ILuint Contents; // ??
ILuint Value; // ??
} WALHEAD;
ILboolean iLoadWalInternal(void);
//! Reads a .wal file
ILboolean ilLoadWal(ILconst_string FileName)
{
ILHANDLE WalFile;
ILboolean bWal = IL_FALSE;
WalFile = iopenr(FileName);
if (WalFile == NULL) {
ilSetError(IL_COULD_NOT_OPEN_FILE);
return bWal;
}
bWal = ilLoadWalF(WalFile);
icloser(WalFile);
return bWal;
}
//! Reads an already-opened .wal file
ILboolean ilLoadWalF(ILHANDLE File)
{
ILuint FirstPos;
ILboolean bRet;
iSetInputFile(File);
FirstPos = itell();
bRet = iLoadWalInternal();
iseek(FirstPos, IL_SEEK_SET);
return bRet;
}
//! Reads from a memory "lump" that contains a .wal file
ILboolean ilLoadWalL(const void *Lump, ILuint Size)
{
iSetInputLump(Lump, Size);
return iLoadWalInternal();
}
ILboolean iLoadWalInternal()
{
WALHEAD Header;
ILimage *Mipmaps[3], *CurImage;
ILuint i, NewW, NewH;
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
CurImage = iCurImage;
// Read header
iread(&Header.FileName, 1, 32);
Header.Width = GetLittleUInt();
Header.Height = GetLittleUInt();
for (i = 0; i < 4; i++)
Header.Offsets[i] = GetLittleUInt();
iread(Header.AnimName, 1, 32);
Header.Flags = GetLittleUInt();
Header.Contents = GetLittleUInt();
Header.Value = GetLittleUInt();
if (!ilTexImage(Header.Width, Header.Height, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL))
return IL_FALSE;
for (i = 0; i < 3; i++) {
Mipmaps[i] = (ILimage*)icalloc(sizeof(ILimage), 1);
if (Mipmaps[i] == NULL)
goto cleanup_error;
Mipmaps[i]->Pal.Palette = (ILubyte*)ialloc(768);
if (Mipmaps[i]->Pal.Palette == NULL)
goto cleanup_error;
memcpy(Mipmaps[i]->Pal.Palette, ilDefaultQ2Pal, 768);
Mipmaps[i]->Pal.PalType = IL_PAL_RGB24;
}
NewW = Header.Width;
NewH = Header.Height;
for (i = 0; i < 3; i++) {
NewW /= 2;
NewH /= 2;
iCurImage = Mipmaps[i];
if (!ilTexImage(NewW, NewH, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL))
goto cleanup_error;
// Don't set until now so ilTexImage won't get rid of the palette.
Mipmaps[i]->Pal.PalSize = 768;
Mipmaps[i]->Origin = IL_ORIGIN_UPPER_LEFT;
}
iCurImage = CurImage;
ilCloseImage(iCurImage->Mipmaps);
iCurImage->Mipmaps = Mipmaps[0];
Mipmaps[0]->Mipmaps = Mipmaps[1];
Mipmaps[1]->Mipmaps = Mipmaps[2];
iCurImage->Origin = IL_ORIGIN_UPPER_LEFT;
if (iCurImage->Pal.Palette && iCurImage->Pal.PalSize && iCurImage->Pal.PalType != IL_PAL_NONE)
ifree(iCurImage->Pal.Palette);
iCurImage->Pal.Palette = (ILubyte*)ialloc(768);
if (iCurImage->Pal.Palette == NULL)
goto cleanup_error;
iCurImage->Pal.PalSize = 768;
iCurImage->Pal.PalType = IL_PAL_RGB24;
memcpy(iCurImage->Pal.Palette, ilDefaultQ2Pal, 768);
iseek(Header.Offsets[0], IL_SEEK_SET);
if (iread(iCurImage->Data, Header.Width * Header.Height, 1) != 1)
goto cleanup_error;
for (i = 0; i < 3; i++) {
iseek(Header.Offsets[i+1], IL_SEEK_SET);
if (iread(Mipmaps[i]->Data, Mipmaps[i]->Width * Mipmaps[i]->Height, 1) != 1)
goto cleanup_error;
}
// Fixes all images, even mipmaps.
return ilFixImage();
cleanup_error:
for (i = 0; i < 3; i++) {
ilCloseImage(Mipmaps[i]);
}
return IL_FALSE;
}
#endif//IL_NO_WAL
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