Homebrew Homebrew Development

[Deleted User]

A user friendly way is using romfs, because accessing it would the same as reading from the sdcard just with a different path. Here is the example: https://github.com/devkitPro/3ds-examples/tree/master/romfs

How can I read and display images from a romfs then?

 

[MasterFeizz]

How can I read and display images from a romfs then?

You can write directly to the framebuffer (slow), or use the GPU. If you want to use the GPU you can either write your own library or use an existing one like sf2d (easier) or citro3d.
Citro3d example: https://github.com/devkitPro/3ds-examples/tree/master/graphics/gpu/textured_cube (Harder)
sfillib (sf2dlib) example: https://github.com/xerpi/sfillib/tree/master/sample (Easier)
They both pack the images directly into the executable, but changing it to load from romfs is easy. With sfilib you only need to use sfil_load_JPEG_file with the romfs path. Check the RomFS example on how to setup the romfs.

 

[Deleted User]

You can write directly to the framebuffer (slow), or use the GPU. If you want to use the GPU you can either write your own library or use an existing one like sf2d (easier) or citro3d.
Citro3d example: https://github.com/devkitPro/3ds-examples/tree/master/graphics/gpu/textured_cube (Harder)
sfillib (sf2dlib) example: https://github.com/xerpi/sfillib/tree/master/sample (Easier)
They both pack the images directly into the executable, but changing it to load from romfs is easy. With sfilib you only need to use sfil_load_JPEG_file with the romfs path. Check the RomFS example on how to setup the romfs.

Thank you for this. I'll experiment with it later.

 

[MasterFeizz]

Thank you for this. I'll experiment with it later.

Do you have any javascript knowledge? I'm soon going to need testers for an API friendliness test, and since you want to experiment with some 3ds homebrew maybe you can help.

 

[Deleted User]

Do you have any javascript knowledge? I'm soon going to need testers for an API friendliness test, and since you want to experiment with some 3ds homebrew maybe you can help.

Unfortunately, Java isn't my strong-point, so I can't really help on that one; sorry.

 

[MasterFeizz]

Unfortunately, Java isn't my strong-point, so I can't really help on that one; sorry.

Its javascript not java, but ok

 

[Deleted User]

Its javascript not java, but ok

Meh, I don't have any skills in Javascript either.

 

[Tjessx]

While compiling the romfs example i get an error 199

linking romfs.elf
built ... romfs.smdh
make[1]: *** [/opt/devkitpro/examples/3ds/romfs/romfs.3dsx] Error 199
make: *** [build] Error 2

Any idea what this could be?

(I'm pretty experienced in javascript)

 

[MasterFeizz]

While compiling the romfs example i get an error 199

linking romfs.elf
built ... romfs.smdh
make[1]: *** [/opt/devkitpro/examples/3ds/romfs/romfs.3dsx] Error 199
make: *** [build] Error 2

Any idea what this could be?

(I'm pretty experienced in javascript)

I just tried compiling it and it worked, do you have the latest devkitarm? I'm on windows so I don't know how the versions are compared between linux and windows.

(I'll contact you when everything is ready to be tested )

 

[Zarxrax]

Can anyone tell me if there currently exists the possibility of writing a homebrew replacement for the application which allows a 3ds to be used as a controller for Smash 4 Wii U? Do we know how the 3ds talks to the Wii U and how to reproduce that?

 

[Tjessx]

I just tried compiling it and it worked, do you have the latest devkitarm? I'm on windows so I don't know how the versions are compared between linux and windows.

(I'll contact you when everything is ready to be tested )

i've reinstalled the environment 2-3 weeks ago, i'll try again tomorrow

 

[erman1337]

any way to test homebrew without a 3ds device? i've tried citra but it doesn't have dpad support!!

edit: using lpp-3ds if that helps

 

[MasterFeizz]

any way to test homebrew without a 3ds device? i've tried citra but it doesn't have dpad support!!

edit: using lpp-3ds if that helps

Unless you want to make a compatible lua player for pc, citra is the best option. Also, I'm pretty sure that citra supports the DPad.

 

[erman1337]

Unless you want to make a compatible lua player for pc, citra is the best option. Also, I'm pretty sure that citra supports the DPad.

Controls.check(Controls.read(), KEY_DRIGHT) keeps returning false when I'm holding on the right button

--------------------- MERGED ---------------------------

Just found the right key, it's H


????????

 

[TheCruel]

Yeah, IJKL are c-pad and TFGH are d-pad iirc.

 

[erman1337]

I'm working on an application using lpp-3ds, and I want to draw a long text, but it would overflow out of the screen, so I did a character limiter thingy:

descLines = {}
desc = themes[currBadge]['desc']
desc:gsub(".", function(c) if #descLines == 0 or #descLines[#descLines] == 31 then table.insert(descLines, c) else descLines[#descLines] = descLines[#descLines] .. c end end)

for i,v in pairs(descLines) do
    h = (i * 22) + 4
    Font.print(font, 5, h, v:gsub("^%s", ""), white, BOTTOM_SCREEN)
end

Although it kinda cuts off letters as you can see in the screenshot above. Is there a better way of doing this?

 

[Tjessx]

Although it kinda cuts off letters as you can see in the screenshot above. Is there a better way of doing this?

I don't know lua, but one thing that you could do:
- split the sentence on spaces into an array of strings
- iterate through the array, and check how many space is left, if there is enough space, then print the word
- if there is not enough space, go to a new line

 

[Tjessx]

I've been trying to create a library using the library template given with the examples of ctrulib.
When it compiles i get the necessary .a file, but i have trouble using that .a file.

I tried including it in the settings of Netbeans, but after losing hours i gave up and placed it inside the devkitPro/libctru folder.
i placed the .a file in lib, and the header files in include.

I can include the header files now in my code, but whenever i try to use something of the library, i get this error:
undefined reference to `Namespace::class:function()'

Could someone tell me how to import a static library in Netbeans, and why i get this error?
Thanks,

 

[Rinnegatamante]

I'm working on an application using lpp-3ds, and I want to draw a long text, but it would overflow out of the screen, so I did a character limiter thingy:

descLines = {}
desc = themes[currBadge]['desc']
desc:gsub(".", function(c) if #descLines == 0 or #descLines[#descLines] == 31 then table.insert(descLines, c) else descLines[#descLines] = descLines[#descLines] .. c end end)

for i,v in pairs(descLines) do
    h = (i * 22) + 4
    Font.print(font, 5, h, v:gsub("^%s", ""), white, BOTTOM_SCREEN)
end

Although it kinda cuts off letters as you can see in the screenshot above. Is there a better way of doing this?

https://github.com/Rinnegatamante/Sunshell/blob/master/LUA/scripts/funcs.lua#L156-L181

This is how Sunshell prints Warning/Errors messages with formatted text according to spaces.

 

[Coto]

I've been trying to create a library using the library template given with the examples of ctrulib.
When it compiles i get the necessary .a file, but i have trouble using that .a file.

I tried including it in the settings of Netbeans, but after losing hours i gave up and placed it inside the devkitPro/libctru folder.
i placed the .a file in lib, and the header files in include.

I can include the header files now in my code, but whenever i try to use something of the library, i get this error:
undefined reference to `Namespace::class:function()'

Could someone tell me how to import a static library in Netbeans, and why i get this error?
Thanks,

have you tried devkitPro/libctru/lib/ for *.a -- compiled object library (library of symbols)
and devkitPro/libctru/include/ for *.h -- symbol declaration folder (header)


say you have a library(.a) called hi

so it will have to be called
libhi.a

also in Makefile you must add:

#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS   := -lhi

edit:

also in whatever .c / .cpp template you use:

you must add the header file, say its called libhi.h:

//main.cpp
#include <libhi.h>

void do_salute(){
hi(); //declaration must be linked 
}