mac.c File Reference

This module is used to extract data from the Macintosh version of Wolfenstein 3-D. More...

#include <stdio.h>
#include <string.h>
#include "mac.h"
#include "../../common/platform.h"
#include "../../common/common_utils.h"
#include "../../loaders/tga.h"
#include "../../memory/memory.h"
#include "../../string/wtstring.h"
#include "../../filesys/file.h"

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Data Structures
struct	spriteRun
Functions
PRIVATE W8 *	getResourceBlock (W32 offset, W32 length, W32 *glen)
	Get block of resource data.
PRIVATE void	Decode_LZSS (W8 dst, const W8 src, W32 length)
	Decodes a block of data that was encoded with LZSS.
PRIVATE void	ConvertPaletteToRGB (W8 dst, W8 src, W32 length, W8 *palette)
	Convert 256 palette data to RGB.
PRIVATE void	setPalette (W32 offset)
	Set global palette.
PRIVATE void	DecodeBJMapImage (W32 offset, W32 length)
	Decodes BJ map image and writes data to tga file.
PRIVATE void	DecodeBJIntermImages (W32 offset, W32 length)
	Decodes BJ intermission images and writes data to tga file.
PRIVATE void	DecodeScreen (W32 offset, W32 length, const char *filename)
	Decode screen from Macintosh resource fork.
PRIVATE void	decodeScreens (void)
	Decodes art data from Macintosh resource fork.
PRIVATE W8 *	obverseWall (const W8 *src, W16 width, W16 height)
	Realign wall image.
PRIVATE void	DecodeWall (W32 offset, W32 length, W32 retval, const char filename)
	Decode then save wall data as TARGA image file.
PRIVATE void	decodeWalls (void)
	Extract wall image data from resource fork.
PRIVATE void	DecodeSprite (W32 offset, W32 length, W32 retval, const char filename)
	Decode then save sprite data as TARGA image file.
PRIVATE void	decodeSprites (void)
	Extract sprites from resource fork.
PRIVATE W8 *	DecodeItem (W8 data, W8 pal)
	Convert item data into RGB raw data.
PRIVATE void	decodeItems (void)
	Extract pic images from resource file.
PRIVATE void	decodeMidi (void)
	Extract midi files from resource fork.
PRIVATE wtBoolean	parseMacBinaryHead (void)
	Parse mac binary header.
PUBLIC void	Macintosh_Decoder (void)
	Interface to Macintosh data extractor.
PUBLIC void	wolf3do_decoder (void)
	Interface to Wolfenstein 3DO data extractor.
Variables
PRIVATE W32	DATAFORKLENGTH = 105754L
PRIVATE W32	RESFORKLENGTH = 2424697L
PRIVATE W32	MACPAL = 898370L
PRIVATE W32	IDPAL = 899142L
PRIVATE W32	GAMEPAL = 946811L
PRIVATE W32	INTERPAL = 997211L
PRIVATE W32	YUMMYPAL = 1011345L
PRIVATE W32	TITLEPAL = 2235007L
PRIVATE W32	PALETTE_SIZE = 768
PRIVATE const char *	MAC_FEXT = "*.MAC"
PRIVATE const char *	MACBINFILENAME = "Wolfenstein 3D"
PRIVATE const char *	FILETYPECREATOR = "APPLWOLF"
PRIVATE W8 *	macPalette
PRIVATE FILE *	fResHandle

Detailed Description

This module is used to extract data from the Macintosh version of Wolfenstein 3-D.

Author:: Michael Liebscher

Date:: 2004-2005

Note:: Portion of this code was derived from code that was originally written by Id Software, Inc., Bill Heineman and Chris DeSalvo.

Function Documentation

PRIVATE void ConvertPaletteToRGB	(	W8 *	dst,
		W8 *	src,
		W32	length,
		W8 *	palette
	)

Convert 256 palette data to RGB.

Parameters:

`[in,out]`	dst	Destination buffer to convert to.
`[in]`	src	256 palette data.
`[in]`	length	Length of source data.
`[in]`	palette	Pointer to 256*3 array.

Returns:: Nothing.

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PRIVATE void Decode_LZSS	(	W8 *	dst,
		const W8 *	src,
		W32	length
	)

Decodes a block of data that was encoded with LZSS.

Parameters:

`[in,out]`	dst	Buffer to hold uncompressed data.
`[in]`	src	Compressed data block.
`[in]`	Length	Length of source data block in bytes.

Returns:: Nothing.

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PRIVATE void DecodeBJIntermImages	(	W32	offset,
		W32	length
	)

Decodes BJ intermission images and writes data to tga file.

Parameters:

`[in]`	offset	Offset in bytes the resource block.
`[in]`	length	Length of encoded data in bytes.

Returns:: Nothing.

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PRIVATE void DecodeBJMapImage	(	W32	offset,
		W32	length
	)

Decodes BJ map image and writes data to tga file.

Parameters:

`[in]`	offset	Offset in bytes the resource block.
`[in]`	length	Length of encoded data in bytes.

Returns:: Nothing.

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PRIVATE W8* DecodeItem	(	W8 *	data,
		W8 *	pal
	)

Convert item data into RGB raw data.

Parameters:

`[in]`	data	data chunk to decode.
`[in]`	pal	palette.

Returns:: On success pointer to RGB data, otherwise NULL.

Note:: src and dest can point to the same memory block.

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PRIVATE void DecodeScreen	(	W32	offset,
		W32	length,
		const char *	filename
	)

Decode screen from Macintosh resource fork.

Parameters:

`[in]`	offset	Offset in bytes the resource block.
`[in]`	length	Length of encoded data in bytes.
`[in]`	filename	Name of file to save as.

Returns:: Nothing.

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PRIVATE void DecodeSprite	(	W32	offset,
		W32	length,
		W32 *	retval,
		const char *	filename
	)

Decode then save sprite data as TARGA image file.

Parameters:

`[in]`	offset	Offset from the start of the resource file in bytes.
`[in]`	length	Length of data block in bytes.
`[out]`	retval	Length of next data block in bytes.
`[in]`	filename	Name of file to save as.

Returns:: Nothing.

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PRIVATE void DecodeWall	(	W32	offset,
		W32	length,
		W32 *	retval,
		const char *	filename
	)

Decode then save wall data as TARGA image file.

Parameters:

`[in]`	offset	Offset from the start of the resource file in bytes.
`[in]`	length	Length of data in bytes.
`[out]`	retval	Length of next block in bytes.
`[in]`	filename	Name of file to save as.