Homebrew [Release] {beta} sf2dlib - Simple and Fast 2D library (using the GPU)

[Sparkette]

By "2D library", do you just mean 2D as opposed to 3D scene rendering, or do you mean it doesn't support 3D depth (as in the 3D top screen) either?

 

[hippy dave]

It draws flat textures and shapes. It has a function to enable/disable stereoscopic mode, so you can use 3D depth on the top screen, I've been doing this manually by offsetting the x positions. There's one texture drawing function that has a depth argument, but I'm not sure what that will do as you draw one side at a time, and I haven't tried it yet as I'm using the function that also has rotation.

 

[hippy dave]

Hi, is there an easy way to apply filtering/anti-aliasing/whatever when drawing a texture with scaling? Cheers

 

[xerpi]

Hi, is there an easy way to apply filtering/anti-aliasing/whatever when drawing a texture with scaling? Cheers

Not yet, it's using the GPU_NEAREST filter right now. I could change it to GPU_LINEAR easily: https://github.com/xerpi/sf2dlib/blob/master/libsf2d/source/sf2d_texture.c#L165

 

[hippy dave]

Not yet, it's using the GPU_NEAREST filter right now. I could change it to GPU_LINEAR easily: https://github.com/xerpi/sf2dlib/blob/master/libsf2d/source/sf2d_texture.c#L165

Cool thanks, I guess it would be nice to have the choice

 

[julian20]

If i want to compile a programm with this library i got this message

shader.vsh
make[1]: python: Command not found
make[1]: *** [shader.vsh.o] Error 127
make: *** [build] Error 2

can someone help me

 

[xerpi]

If i want to compile a programm with this library i got this message

shader.vsh
make[1]: python: Command not found
make[1]: *** [shader.vsh.o] Error 127
make: *** [build] Error 2

can someone help me

You need to install Python: https://www.python.org/downloads/

 

[julian20]

You need to install Python: https://www.python.org/downloads/

I already installed (2.7 and 3.4.3)

So i am confused

 

[xerpi]

I already installed (2.7 and 3.4.3)

So i am confused

Try setting the environment variables (PATH) to point to the python binaries.

 

[julian20]

Try setting the environment variables (PATH) to point to the python binaries.

Ok it worked. Thanks!

 

[Cid2mizard]

With the function "sf2d_get_pixel ( sf2d_texture texture * , int x , int y) Gets a pixel of the texture."
What exactly is the color back ? I get the value 35 for transparent. Other values for colors, order it seems that different colors return the same value ...

 

[Cid2mizard]

xerpi have resolve my problem on irc, problem came from my code... you can find here a good use of sf2d_get_pixel...

Spoiler

#include <stdio.h>
#include <3ds.h>
#include <sf2d.h>

touchPosition Stylus;

u32 kDown;
u32 kHeld;

extern const struct {
  unsigned int      width;
  unsigned int      height;
  unsigned int      bytes_per_pixel;
  unsigned char     pixel_data[];
} number_img, colorzone_img;

typedef struct
{
    sf2d_texture * texture;
}
images;
images numbers, colorzone;

int base10_length(u32 number)
{
    int length = 1;
    while (number > 9) {
        length++;
        number /= 10;
    }
    return length;
}

void draw_number_base10(u32 number, u16 posx, u16 posy)
{
    int num_len = base10_length(number);
    u16 cur_posx = posx + (num_len - 1) * 12;

    while (number > 0) {
        u8 digit = number % 10;
        sf2d_draw_texture_part(numbers.texture, cur_posx, posy, digit*8, 0, 8, 10);
        cur_posx -= 12;
        number /= 10;
    }
}


int main()
{
    sf2d_init();
    //sf2d_set_clear_color(RGBA8(0x40, 0x40, 0x40, 0xFF));

    numbers.texture = sf2d_create_texture(number_img.width, number_img.height, GPU_RGBA8, SF2D_PLACE_RAM);
    sf2d_fill_texture_from_RGBA8(numbers.texture, number_img.pixel_data, number_img.width, number_img.height);
    sf2d_texture_tile32(numbers.texture);

    colorzone.texture = sf2d_create_texture(colorzone_img.width, colorzone_img.height, GPU_RGBA8, SF2D_PLACE_RAM);
    sf2d_fill_texture_from_RGBA8(colorzone.texture, colorzone_img.pixel_data, colorzone_img.width, colorzone_img.height);
    sf2d_texture_tile32(colorzone.texture);

    u32 color = 0;

    while (aptMainLoop()) {

        hidScanInput();
        u32 held = hidKeysHeld();
        if (held & KEY_TOUCH) {
            hidTouchRead(&Stylus);
            color = sf2d_get_pixel(colorzone.texture, Stylus.px, Stylus.py);
        }

        if (held & KEY_START) break;

        sf2d_start_frame(GFX_TOP, GFX_LEFT);
            sf2d_draw_rectangle(0, 0, 400, 240, __builtin_bswap32(color));
        sf2d_end_frame();


        sf2d_start_frame(GFX_BOTTOM, GFX_LEFT);
            sf2d_draw_texture(colorzone.texture, 0, 0);
            draw_number_base10(color, 10, 10);
        sf2d_end_frame();


        sf2d_swapbuffers();
    }

    sf2d_free_texture(numbers.texture);
    sf2d_free_texture(colorzone.texture);

    sf2d_fini();
    return 0;
}

 

[josamilu]

Hi,
I have a problem. I wanted to compile the libary + sample. Compiling the libary with "make install" works fine, but when I try to make the sample i get this error.

linking sf2d_sample.elf
d:/devkitPro/libctru/lib\libsf2d.a(sf2d.o): In function `sf2d_init_advanced':
d:/devkitPro/ctrulib/sf2dlib-master/libsf2d/source/sf2d.c:88: undefined reference to `shader_vsh_shbin_size'
d:/devkitPro/ctrulib/sf2dlib-master/libsf2d/source/sf2d.c:88: undefined reference to `shader_vsh_shbin'
collect2.exe: error: ld returned 1 exit status
make[1]: *** [/d/devkitPro/ctrulib/sf2dlib-master/sample/sf2d_sample.elf] Error
1
make: *** [build] Error 2

Thanks for any help,
-josamilu

 

[hippy dave]

Can't immediately see where that's from, but is your ctrulib up to date?

 

[josamilu]

Can't immediately see where that's from, but is your ctrulib up to date?

D:\devkitPro\ctrulib\libctru>make install
make[1]: `/d/devkitPro/ctrulib/libctru/lib/libctru.a' is up to date.
mkdir -p /D/devkitPro/libctru
bzip2 -cd libctru-0.5.0.tar.bz2 | tar -x -C /D/devkitPro/libctru

As you can see my ctrulib is up to date, but I still get the error :/

Do I have to compile it on Linux? Because there is this, when I compile the lib :

shader.vsh
/bin/sh: bin2s: command not found
sf2d.c

(But I still get out the .a file ... :/)

 

[hippy dave]

Yeah that might be the issue. I don't know about compiling it on windows, sorry - hopefully someone else can help.

 

[TheCruel]

bin2s is a devkitPro program, so your environment path variables probably aren't set up right. Look at a devkitARM installation guide again.

 

[xerpi]

bin2s is a devkitPro program, so your environment path variables probably aren't set up right. Look at a devkitARM installation guide again.

Exactly, his PATH environment variable isn't pointing to the devkitARM/bin folder.

 

[josamilu]

Exactly, his PATH environment variable isn't pointing to the devkitARM/bin folder.

My PATH variable was always pointing to the devitARM/bin folder, but in there are a lot of exe s, but no bin2s.exe ?! I tried to update my devkitPro, but there is no aviable update. What can I do? :/

 

[Cid2mizard]

I 'm not sure , do we not also install " Python Imaging Library (PIL ) " ?