Homebrew Homebrew Development

[Spaqin]

I'm using NDSP.
I actually did some tests - I didn't move the NDSP thread to syscore (not appcore), but the thread calling ov_read (loading and decoding and putting into ndsp queue), and even with the bigger buffer it still skips. I guess 30% of the second core is not enough.

 

[YugamiSekai]

Any homebrew coding tutorials that are new and updated?

 

[Spaqin]

Any homebrew coding tutorials that are new and updated?

I'm pretty sure there are no coding tutorials really. If you know C/C++ and can read the examples and documentation, you're good to go.

 

[TarableCode]

I've been looking into how to get the consoleDoWhatever() functions to render to a texture but without luck since they seem to be raw framebuffer only.
Aside from de-initting all my bottom screen Citro3D stuff and switching to the console, is there an easy way to render text or am I stuck writing my own font renderer?

 

[daxtsu]

Does anyone know if it's possible to have a CIA application create a thread which can continue to run in the background, after the application itself has exited? I'm interested in creating a homebrew service (and no, I don't mean loading homebrew, I mean a custom service that can respond to commands, like srv, svc, etc.), but it's not really that useful if it dies when the application does.

 

[Rinnegatamante]

Does anyone know if it's possible to have a CIA application create a thread which can continue to run in the background, after the application itself has exited? I'm interested in creating a homebrew service (and no, I don't mean loading homebrew, I mean a custom service that can respond to commands, like srv, svc, etc.), but it's not really that useful if it dies when the application does.

Quite sure @filfat already tried something like this and it resulted on thread closing when application exited.

 

[daxtsu]

Quite sure @filfat already tried something like this and it resulted on thread closing when application exited.

That's what I was afraid of..maybe I need to try and create a system module instead..

 

[Rinnegatamante]

That's what I was afraid of..maybe I need to try and create a system module instead..

So maybe you could find interesting yifanlu Loader service (don't know if it's even finished): https://github.com/yifanlu/3ds_injector

 

[TheCruel]

Is it libvorbis giving problems with hard float abi? Have you tried stb_vorbis decoder? I'm about to try it now, so wondering if it also has problems.

 

[daxtsu]

No luck with a custom system module. Installed my test service (using category Base, like other system modules) and it's never ran (homebrew that tries to get a handle to the service I wanted to install freezes the console, same as if you tried to access an invalid/non-existent service). I guess what modules to load are hard-coded into NATIVE_FIRM or something. Oh well.

 

[spinal_cord]

I've been wondering, has anyone at all looked into the format of the e-manual files, for use with homebrew .cia?

 

[Rinnegatamante]

Is it libvorbis giving problems with hard float abi? Have you tried stb_vorbis decoder? I'm about to try it now, so wondering if it also has problems.

standard vorbisfile just get distorted audio with hardware floating points. ( https://github.com/smealum/ctrulib/issues/202 )

 

[~Poke~]

No luck with a custom system module. Installed my test service (using category Base, like other system modules) and it's never ran (homebrew that tries to get a handle to the service I wanted to install freezes the console, same as if you tried to access an invalid/non-existent service). I guess what modules to load are hard-coded into NATIVE_FIRM or something. Oh well.

Maybe it would be more practical to replace a little-used service until this gets figured out? 3Dbrew seems to suggest that some services only start when called, so it shouldn't need to be launched at console boot but perhaps it's hard coded which to call.
(Sorry for back seating, a couple days ago I was looking into doing the same, but I don't really understand enough internals to get past the pondering stage..)

 

[daxtsu]

Maybe it would be more practical to replace a little-used service until this gets figured out? 3Dbrew seems to suggest that some services only start when called, so it shouldn't need to be launched at console boot but perhaps it's hard coded which to call.
(Sorry for back seating, a couple days ago I was looking into doing the same, but I don't really understand enough internals to get past the pondering stage..)

I guess I could maybe have it replace the friends module or something as a test, since I almost never use the friends list. I've fiddled around with it enough for one day though.

 

[YugamiSekai]

I'm pretty sure there are no coding tutorials really. If you know C/C++ and can read the examples and documentation, you're good to go.

I'm currently learning C++. I guess I'll have to make my own...

 

[josamilu]

Just wanted to throw in a picture of a litte 2 player competetive shooting game i developed around 4 months ago, and if someone wants to see it released with polished graphics and more powerups

Spoiler: Screenshot

 

[Goombi]

Hey there, I have a question, maybe you could help me: I'm working on a save editor and having 4 bytes at the end of the encrypted file that are not in the decrypted one.
The first two are always 0x0000, the last two change everytime the file change, so I highly suspect a checksum (CRC16 for 2 bytes or 32 with mixed bytes or whatever).
I can't figure how it is calculated. Does Nintendo always use the same method or every app has it's own way to compute checksums?

 

[TarableCode]

I've been looking into how to get the consoleDoWhatever() functions to render to a texture but without luck since they seem to be raw framebuffer only.
Aside from de-initting all my bottom screen Citro3D stuff and switching to the console, is there an easy way to render text or am I stuck writing my own font renderer?

In case anyone else needs it, I've found a solution:

#include <3ds.h>
#include <citro3d.h>
#include <stdio.h>
#include <malloc.h>
#include <sys/iosupport.h>
#include "c3d_console.h"

#define CONSOLE_TEXTURE_TRANSFER_FLAGS \
	(GX_TRANSFER_FLIP_VERT(1) | GX_TRANSFER_OUT_TILED(1) | GX_TRANSFER_RAW_COPY(0) | \
	GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGB565) | GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB565) | \
	GX_TRANSFER_SCALING(GX_TRANSFER_SCALE_NO))

extern ssize_t con_write(struct _reent *r,int fd,const char *ptr, size_t len);
extern u8 default_font_bin[ ];

static u16* ConsoleBuffer240x320 = NULL;
static u16* ConsoleTextureBuffer = NULL;

C3D_Tex ConsoleTexture;

static PrintConsole C3DConsole = {
	{
		default_font_bin,
		0,
		256
	},
	NULL,
	0,
	0,
	0,
	0,
	40,
	30,
	0,
	0,
	40,
	30,
	3,
	7,
	0,
	0,
	0,
	false
};

static const devoptab_t MyDevOpTab = {
	"con",
	0,
	NULL,
	NULL,
	con_write,
	NULL,
	NULL,
	NULL
};

void C3D_ConsoleFree( void ) {
	if ( ConsoleBuffer240x320 )
		free( ConsoleBuffer240x320 );

	if ( ConsoleTextureBuffer )
		linearFree( ConsoleTextureBuffer );

	ConsoleBuffer240x320 = NULL;
	ConsoleTextureBuffer = NULL;
}

int C3D_ConsoleInit( void ) {
	int i = 0;

	ConsoleBuffer240x320 = ( u16* ) malloc( 240 * 320 * 2 );
	ConsoleTextureBuffer = ( u16* ) linearMemAlign( 256 * 512 * 2, 0x80 );

	if ( ConsoleBuffer240x320 && ConsoleTextureBuffer ) {
		C3D_TexInit( &ConsoleTexture, 256, 512, GPU_RGB565 );

		devoptab_list[ STD_OUT ] = &MyDevOpTab;
		devoptab_list[ STD_ERR ] = &MyDevOpTab;

		setvbuf( stdout, NULL, _IONBF, 0 );
		setvbuf( stderr, NULL, _IONBF, 0 );

		C3DConsole.frameBuffer = ConsoleBuffer240x320;
		C3DConsole.consoleInitialised = true;

		consoleSelect( &C3DConsole );
		consoleSetWindow( &C3DConsole, 0, 0, 320 / 8, 240 / 8 );
		consoleClear( );

		/*
		 * BUGBUGBUG:
		 * First 2 lines don't exist?
		 * So it's like the window is actually 40x28 for some reason.
		 */
		for ( i = 0; i <= 29; i++ ) {
			printf( "line %d\n", i );
		}

		return 1;
	}

	

	C3D_ConsoleFree( );
	return 0;
}

void C3D_ConsoleUpdate( void ) {
	u16* Src = ( u16* ) ConsoleBuffer240x320;
	u16* Dst = ( u16* ) ConsoleTextureBuffer;
	int x = 0;
	int y = 0;

	/*
	 * TODO:
	 * Speed up later, this is gonna be slow as BALLS.
	 */
	for ( y = 0; y < 320; y++ ) {
		for ( x = 0; x < 240; x++ ) {
			Dst[ x + ( y * 256 ) ] = Src[ x + ( y * 240 ) ];
		}
	}

	GSPGPU_FlushDataCache( ConsoleTextureBuffer, 256 * 512 * 2 );
	GX_DisplayTransfer( ( u32* ) ConsoleTextureBuffer, GX_BUFFER_DIM( 256, 512 ), ( u32* ) ConsoleTexture.data, GX_BUFFER_DIM( 256, 512 ), CONSOLE_TEXTURE_TRANSFER_FLAGS );
	gspWaitForPPF( );
}

void C3D_ConsoleDraw( void ) {
	C3D_TexBind( 0, &ConsoleTexture );

	/*
	 * Sorcery!
	 * I don't know it either.
	 */
	C3D_ImmDrawBegin( GPU_TRIANGLES );
		// 1st triangle
		C3D_ImmSendAttrib( 0, 0, 0.5, 0.0 );
		C3D_ImmSendAttrib( 1.0, 0.0, 0.0, 0.0 );

		C3D_ImmSendAttrib( 512, 256, 0.5, 0.0 );
		C3D_ImmSendAttrib( 0.0, 1.0, 0.0, 0.0 );

		C3D_ImmSendAttrib( 512, 0, 0.5, 0.0 );
		C3D_ImmSendAttrib( 1.0, 1.0, 0.0, 0.0 );
			
		// 2nd triangle
		C3D_ImmSendAttrib( 0, 0, 0.5, 0.0 );
		C3D_ImmSendAttrib( 1.0, 0.0, 0.0, 0.0 );

		C3D_ImmSendAttrib( 0, 256, 0.5, 0.0 );
		C3D_ImmSendAttrib( 0.0, 0.0, 0.0, 0.0 );

		C3D_ImmSendAttrib( 512, 256, 0.5, 0.0 );
		C3D_ImmSendAttrib( 0.0, 1.0, 0.0, 0.0 );
	C3D_ImmDrawEnd( );
}

Minor bug with the console being off by 2 lines but it seems to work.

 

[daxtsu]

Hey there, I have a question, maybe you could help me: I'm working on a save editor and having 4 bytes at the end of the encrypted file that are not in the decrypted one.
The first two are always 0x0000, the last two change everytime the file change, so I highly suspect a checksum (CRC16 for 2 bytes or 32 with mixed bytes or whatever).
I can't figure how it is calculated. Does Nintendo always use the same method or every app has it's own way to compute checksums?

Are you working on something relating to Majora's Mask or Ocarina of Time? That sounds awfully familiar.

 

[VaiCorinthians]

I'm trying to install portlib, but I have this error, anyone know how to solve?
(on windows machine)