Homebrew [WIP] 3DeSmume (DS emulator for 3DS)

[itsthenavy]

The only thing I can think of is: Maybe the alpha value comes first? So it would look like:
1 bit a
5 bit b
5 bit g
5 bit r

Unless there's something weird about it, then BGR5A1 ought to look like this

abbbbbgggggrrrrr
15-------------0

 

[shutterbug2000]

Unless there's something weird about it, then BGR5A1 ought to look like this

abbbbbgggggrrrrr
15-------------0

http://fossies.org/linux/SDL2/src/render/psp/SDL_render_psp.c

According to this, GU_PSM_5551(the psp render type the emu is using) means (SDL_PIXELFORMAT_)ABGR1555. So would that still be correct?

 

[MasterFeizz]

http://fossies.org/linux/SDL2/src/render/psp/SDL_render_psp.c

According to this, GU_PSM_5551(the psp render type the emu is using) means (SDL_PIXELFORMAT_)ABGR1555. So would that still be correct?

Try this out then:

#define BGR5A1_RGB5A1(src)  ((src & 0x7C00) >> 10) | ((src & 0x1F) << 10) | (src & 0x83E0))

 

[itsthenavy]

http://fossies.org/linux/SDL2/src/render/psp/SDL_render_psp.c

According to this, GU_PSM_5551(the psp render type the emu is using) means (SDL_PIXELFORMAT_)ABGR1555. So would that still be correct?

As an developer using SDL, after looking at the documentation for that format I think the way we both said looks to be it. Give it a try and see what happens.

 

[ThePanchamBros]

Yeah, you read that right.
I have been working quite a bit on porting Desmume to the 3DS. As it stands, it:
Appears to run at a decent fps
Has massive graphical corruption
Can't do much of anything do to lack of input support.

Not only did I make this thread to keep people updated on the project, I also need some help.

I'm not the most experienced with sf2dlib, so I end up with graphical corruption. If anyone with experience with sf2dlib would want to provide some tips/advice as to what could be going wrong, here's the rendering code:

     for(i=0; i < 256*192; i++)
     {
     dstA[i] = src[i]; //Screen buffer to top screen buffer
     dstB[i] = src[(256*192)+i]; //Screen buffer to bottom screen buffer
     }

    sf2d_texture *texture = sf2d_create_texture(256, 192, TEXFMT_RGB5A1, SF2D_PLACE_RAM);
    void* texturedata = texture->data;
    u16* texturedata16 = (u16*)texturedata;
     for(x=0; x < (256*192); x++){
        texturedata16[x] = dstA[x];
    
    }

Thanks!

BTW, please no spamming. Lets actually try to keep the discussion on topic, shall we? Thanks .

EDIT: http://gbatemp.net/threads/early-w-i-p-ds-emulation-on-3ds.430223/page-6#post-6430835

this is amazing

 

[shutterbug2000]

Try this out then:

#define BGR5A1_RGB5A1(src)  ((src & 0x7C00) >> 10) | ((src & 0x1F) << 10) | (src & 0x83E0))

Nope, that just gives a more yellow tint.

I almost wonder...
Try the previous method, but convert it to rgba8.

It appears almost like what it would be if you set a PC to lower colors(like 256 colors mode or something like that), if that helps at all.

 

[MasterFeizz]

Nope, that just gives a more yellow tint.

I almost wonder...
Try the previous method, but convert it to rgba8.

It appears almost like what it would be if you set a PC to lower colors(like 256 colors mode or something like that), if that helps at all.

Then Iguess it worked, since it's converted from a smaller color space.

 

[shutterbug2000]

Wait, I might have actually been using the wrong piece of code for that last test. Just a minute.

EDIT:
Here's a picture:

Spoiler

 

[Chaos8425]

I don't need anyone to strike me down with negativeness, but thanks to the person who dedicated their time to starting this... project thing.

 

[Deleted User]

hype Hype Hype HYPE HYPE HYPE

 

[shutterbug2000]

Ok, I edited the previous post with a picture of what is happening.

 

[Angelcraft]

Wait, I might have actually been using the wrong piece of code for that last test. Just a minute.

EDIT:
Here's a picture:

Spoiler

Cool ^^ !!

 

[jackb994]

Wait, I might have actually been using the wrong piece of code for that last test. Just a minute.

EDIT:
Here's a picture:

Spoiler

This is amazing (this is also coming from a flashcart owner)

 

[Deleted User]

Did you use something like this
http://wiki.libretro.com/index.php?title=DeSmuME

 

[shutterbug2000]

Did you use something like this
http://wiki.libretro.com/index.php?title=DeSmuME

No, I'm porting a custom version of Desmume originally for the PSP

 

[Deleted User]

Talk about hard work

 

[shutterbug2000]

Talk about hard work

Is that 3DS emote new? I don't seem to remember seeing it before. .

 

[RocketRobz]

Ok, I edited the previous post with a picture of what is happening.

How about you edit the OP as well?

 

[New_Newbie]

Haha, you're about to make a lot of noobs really happy, my friend. (No, but this is amazing and I will be silently following this thread!)

 

[shutterbug2000]

How about you edit the OP as well?

Done .