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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2000-2002 by Denton Woods
// Last modified: 05/26/2002 <--Y2K Compliant! =]
//
// Filename: src-IL/src/il_pxr.c
//
// Description: Reads from a Pxrar (.pxr) file.
//
//-----------------------------------------------------------------------------
#include "il_internal.h"
#ifndef IL_NO_PXR
#include "il_endian.h"
#ifdef _MSC_VER
#pragma pack(push, pxr_struct, 1)
#endif
typedef struct PIXHEAD
{
ILushort Signature;
ILubyte Reserved1[413];
ILushort Height;
ILushort Width;
ILubyte Reserved2[4];
ILubyte BppInfo;
ILubyte Reserved3[598];
} IL_PACKSTRUCT PIXHEAD;
#ifdef _MSC_VER
#pragma pack(pop, pxr_struct)
#endif
ILboolean iLoadPxrInternal(void);
//! Reads a Pxr file
ILboolean ilLoadPxr(ILconst_string FileName)
{
ILHANDLE PxrFile;
ILboolean bPxr = IL_FALSE;
PxrFile = iopenr(FileName);
if (PxrFile == NULL) {
ilSetError(IL_COULD_NOT_OPEN_FILE);
return bPxr;
}
bPxr = ilLoadPxrF(PxrFile);
icloser(PxrFile);
return bPxr;
}
//! Reads an already-opened Pxr file
ILboolean ilLoadPxrF(ILHANDLE File)
{
ILuint FirstPos;
ILboolean bRet;
iSetInputFile(File);
FirstPos = itell();
bRet = iLoadPxrInternal();
iseek(FirstPos, IL_SEEK_SET);
return bRet;
}
//! Reads from a memory "lump" that contains a Pxr
ILboolean ilLoadPxrL(const void *Lump, ILuint Size)
{
iSetInputLump(Lump, Size);
return iLoadPxrInternal();
}
// Internal function used to load the Pxr.
ILboolean iLoadPxrInternal()
{
ILushort Width, Height;
ILubyte Bpp;
Width = sizeof(PIXHEAD);
iseek(416, IL_SEEK_SET);
Height = GetLittleUShort();
Width = GetLittleUShort();
iseek(424, IL_SEEK_SET);
Bpp = (ILubyte)igetc();
switch (Bpp)
{
case 0x08:
ilTexImage(Width, Height, 1, 1, IL_LUMINANCE, IL_UNSIGNED_BYTE, NULL);
break;
case 0x0E:
ilTexImage(Width, Height, 1, 3, IL_RGB, IL_UNSIGNED_BYTE, NULL);
break;
case 0x0F:
ilTexImage(Width, Height, 1, 4, IL_RGBA, IL_UNSIGNED_BYTE, NULL);
break;
default:
ilSetError(IL_INVALID_FILE_HEADER);
return IL_FALSE;
}
iseek(1024, IL_SEEK_SET);
iread(iCurImage->Data, 1, iCurImage->SizeOfData);
iCurImage->Origin = IL_ORIGIN_UPPER_LEFT;
return IL_TRUE;
}
#endif//IL_NO_PXR
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