EvilEngine/CRDT

CRDT
Credits
Type	Binary
Games used	Battle for Bikini Bottom The SpongeBob SquarePants Movie The Incredibles Rise of the Underminer Ratatouille Prototype
Source code	xCM.h

Format

xCMHeader

struct xCMheader
{
    unsigned int magic;
    unsigned int version;
    unsigned int crdID;
    unsigned int state;
    float total_time;
    unsigned int total_size;
};

Offset	Type	Variable	Description
0x00	u32	magic	0xBEEEEEEF
0x04	u32	version	256 (1.0) - BFBB 512 (2.0) - TSSM - RatProto (Obfuscated)
0x08	AssetID	crdID
0x0C	u32	state	1 = Not encrypted. 3 = Encrypted, the game will decrypt the credits file.
0x10	f32	total_time	Duration in seconds. After this it loops
0x14	u32	total_size	Total size of CRDT asset

After this header the obfuscated data section (a XOR cipher with the key "xCMChunkHand", see example decrypt function) in version 2 credits begins. TSSM - RatProto still support non-obfuscated credits if state is set to 1.

xCMcredits

struct xCMcredits
{
    unsigned int credits_size;
    float len;
    unsigned int flags;
    sxy in;
    sxy out;
    float scroll_rate;
    float lifetime;
    fade fin;
    fade fout;
    unsigned int num_presets;
};

Offset	Type	Variable	Description
0x00	u32	credits_size	Size of credits entry
0x04	f32	len	Duration of section in seconds
0x08	u32	flags	unknown - Alternates between 0 and 1
0x0C	f32	in.x	Start X (Width) position. Doesn't seem to work.
0x10	f32	in.y	Start Y (Height) position. 0 = Top, 1 = Bottom of screen
0x14	f32	out.x	End X (Width) position. Doesn't seem to work.
0x18	f32	out.y	End Y (Height) position. 0 = Top, 1 = Bottom of screen
0x1C	f32	scroll_rate
0x20	f32	lifetime
0x24	f32	fin.start	Start fade-in
0x28	f32	fin.end	End fade-in
0x2C	f32	fout.start	Start fade-out
0x30	f32	fout.end	End fade-out
0x34	u32	num_presets	Number of preset entries

xCMpreset

struct xCMpreset
{
    unsigned short num; 
    unsigned short align;
    float delay;
    float innerspace;
    xCMtextbox box[2];
};

Offset	Type	Variable	Description
0x00	u16	num	Preset index
0x02	u16	align	0 = Textbox 4 = Texture
0x04	f32	delay
0x08	f32	innerspace
0x0C	xCMtextbox[2] or xCMtexture[2]

xCMtexture

Unused in BFBB but still supported.

struct xCMtexture
{
    unsigned int assetID;
    xColor_tag color;
    float x;
    float y;
    float w;
    float h;
    RwTexture* texture;
    unsigned int pad;
};

Offset	Type	Variable	Description
0x00	AssetID	assetID	Texture AssetID
0x04	Color	color
0x08	f32	x
0x0C	f32	y
0x10	f32	w
0x14	f32	h
0x18	RwTexture*	texture	Unknown
0x1C	u32	pad	Unknown

xCMtextbox

struct xCMtextbox
{
    unsigned int font;
    xColor_tag color;
    sxy char_size;
    sxy char_spacing;
    sxy box;
};

Offset	Type	Variable	Description
0x00	u32	font
0x04	Color	color
0x08	f32	char_size.x	Char Width in pixels
0x0C	f32	char_size.y	Char Height in pixels
0x10	f32	char_spacing.x
0x14	f32	char_spacing.y
0x18	f32	box.x	Max Screen Width - percentage of screen (0 to 1)
0x1C	f32	box.y	Max Screen Height - percentage of screen (0 to 1)

xCMhunk

Multiple present until it reaches credits_size.

struct xCMhunk
{
    unsigned int hunk_size;
    unsigned int preset;
    float t0;
    float t1;
    char* text1;
    char* text2;
};

Offset	Type	Variable	Description
0x00	u32	hunk_size	Size of hunk entry
0x04	u32	preset	Preset index
0x08	f32	t0	Start Time
0x0C	f32	t1	End Time
0x10	char*	text1	Absolute offset of text, null if text is empty/null.
0x14	char*	text2	Always null/unused?
0x18	char[]	-	Text, null-terminated 4-byte alignment

Example C# Decrypt Function

private void DecryptData(ref byte[] data)
{
    byte last = 0;
    string key = "xCMChunkHand";
    for (int i = 0x18; i < data.Length; i++)
    {
        last = (byte)(data[i] ^ last ^ key[i % key.Length]);
        data[i] = last;
    }
}