How does romfs work?


Views: 1,610,116	Main \| Rules/FAQ \| Memberlist \| Active users \| Last posts \| Calendar \| Stats \| Online users \| Search	11-24-24 02:08 AM
Guest:

0 users reading How does romfs work? | 1 bot

Main - Homebrew discussion - How does romfs work?

Hide post layouts | New reply

Eclipse2212

Posted on 08-10-16 08:47 PM

Link | #1061

Newcomer
Normal user

Level: 5

Posts: 1/3
EXP: 285
Next: 244

Since: 08-10-16

Last post: 3027 days ago
Last view: 3016 days ago

Hello,

I'm working on an homebrew that require to load a crapload of files, essentially sprites and sound.

I've searched a lot over the Internet, but, I don't understand how to link the files to the code
(I'm using sf2d with sftd and sfil, if it can help.)

I tried several times but the only thing that render is a black screen and my console who hangs (I use a 2Ds xD)

I worked when I was using the data folder, so, I really don't understand why it doesn't work.

I will accept any kind of help, beceause this make me crazy.

Oh, if you want the source code, i can link a compressed file.

Have a nice trap!

Eclipse2212.

profi200

Posted on 08-10-16 08:51 PM

Link | #1062

Member
Who knows?

Level: 19

Posts: 67/70
EXP: 34520
Next: 1257

Since: 05-21-15
From: Germany

Last post: 2995 days ago
Last view: 2863 days ago

Example how to use the RomFS here: https://github.com/devkitPro/3ds-examples/tree/master/romfs

Eclipse2212

Posted on 08-10-16 08:58 PM

Link | #1063

Newcomer
Normal user

Level: 5

Posts: 2/3
EXP: 285
Next: 244

Since: 08-10-16

Last post: 3027 days ago
Last view: 3016 days ago

Thanks, already found this example,
Actually, I'm using this to try to make my code work.

It leads me to a "silly" question: when i load the files with sfil, do I have to open the file by myself, or the lib do it by itself?

profi200

Posted on 08-10-16 09:29 PM

Link | #1064

Member
Who knows?

Level: 19

Posts: 68/70
EXP: 34520
Next: 1257

Since: 05-21-15
From: Germany

Last post: 2995 days ago
Last view: 2863 days ago

I'm not familiar with that lib. If it is not hardcoded to sdmc:/ and uses fopen and friends you can just pass romfs:/ paths.

Eclipse2212

Posted on 08-10-16 09:46 PM (rev. 4 of 08-10-16 10:14 PM)

Link | #1065

Newcomer
Normal user

Level: 5

Posts: 3/3
EXP: 285
Next: 244

Since: 08-10-16

Last post: 3027 days ago
Last view: 3016 days ago

Okay, gonna search in the lib project

EDIT:

Hmmm...

Found on png.c in the sfil project:

sf2d_texture *sfil_load_PNG_file(const char *filename, sf2d_place place)
{
	png_byte pngsig[PNG_SIGSIZE];
	FILE *fp;

	if ((fp = fopen(filename, "rb")) == NULL) {
		goto exit_error;
	}

	if (fread(pngsig, 1, PNG_SIGSIZE, fp) != PNG_SIGSIZE) {
		goto exit_close;
	}

	if (png_sig_cmp(pngsig, 0, PNG_SIGSIZE) != 0) {
		goto exit_close;
	}

	sf2d_texture *texture = _sfil_load_PNG_generic((void *)fp, _sfil_read_png_file_fn, place);
	fclose(fp);
	return texture;

exit_close:
	fclose(fp);
exit_error:
	return NULL;
}

So, the Lib open the file as "read binary", so the erroro come from the path of the files?

I declared the load like this:

sf2d_texture *Act0 = sfil_load_PNG_file("romfs:/tex/spr_actbt_center_0.png", SF2D_PLACE_RAM);

Is this Ok?

(Sorry to bother you so much)

EDIT 2:

Oh, the files weren't at the good place

profi200

Posted on 08-10-16 10:17 PM

Link | #1066

Member
Who knows?

Level: 19

Posts: 69/70
EXP: 34520
Next: 1257

Since: 05-21-15
From: Germany

Last post: 2995 days ago
Last view: 2863 days ago

So yes, the lib should deal fine with files from RomFS. Now you just must make sure the files are actually in the RomFS and at the right location.

Main - Homebrew discussion - How does romfs work?

Hide post layouts | New reply

Page rendered in 0.012 seconds. (2048KB of memory used)
MySQL - queries: 28, rows: 75/75, time: 0.005 seconds.
[powered by Acmlm]