Get DDS file size

[krystalgamer]

Hello, this is my first post so i hope i'm posting in the correction section.

Today i started to try to mod a game called "Ultimate Spiderman" released in 2005. My goal is to write a tool to extract all files from its PCPACKs(unknown ones will be exported as binaries)
I opened a PCPACK file(most probably where the files i want are stored) and i find some unencrypted DDS files inside them, like the web texture, but after looking a little more i found that there are more DDS files than that and the size is variable. Analyzing the DDS_HEADER structure doesn't seem to help too.

So my question is how to get DDS file size so it's easier to export?

I can upload the file that i talked about if needed.

Thanks in advance.

[WRS]

Analyzing the DDS_HEADER structure doesn't seem to help too.

why not? what does that structure contain? i have no idea what it looks like!

the dds version will help - different formats pack the texture data differently. it might be stored as another value somewhere. do you also have the width and height?

[chrrox]

you have to do this for each mip
but here is what i use for the main mip.

Code: Select all

DXT1    - dataSize = (imgWidth * imgHeight * 4) // 8
DXT5    - dataSize = (imgWidth * imgHeight * 8) // 8
RGBA32 - dataSize = (imgWidth * imgHeight * 8)

[krystalgamer]

Sorry for being so vague, i thought that there was an undocumented variable of DDS_FILE header the contained its size but now i understand it can be anywhere in the archive.

Analyzing the DDS_HEADER structure doesn't seem to help too.

why not? what does that structure contain? i have no idea what it looks like!

the dds version will help - different formats pack the texture data differently. it might be stored as another value somewhere. do you also have the width and height?

The texture i extracted is DXT3, its height and width is 64x64. I included the 0x00 at the end because at the time i had no ideia if they're required.

you have to do this for each mip
but here is what i use for the main mip.

Code: Select all

DXT1    - dataSize = (imgWidth * imgHeight * 4) // 8
DXT5    - dataSize = (imgWidth * imgHeight * 8) // 8
RGBA32 - dataSize = (imgWidth * imgHeight * 8)

Hmm any suggestion for DXT3? I uploaded the file i extracted.


I'll look more in the archive i've been so busy that i couldn't look more deeply into PCPACKs. I'll post an update ASAP.

[chrrox]

Dxt3 and 5 are identical size only difference is how alpha channel is read