Homebrew app Arm crash occurs when running sprite rendering code

[Linc0]

I'm using devkitpro, and I pretty much copied the gpusprites code, but I thought I could shorten it for my needs, apparently not. I should say I am very new to 3DS programming, but not programming in general.

The exception type is data abort, and on the Citra it ran fine but didn't show the sprite, but when I added the if statement under the spriteSheet loading line it said that there was a fatal error, but still let me continue if I wanted.

#include <citro2d.h>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define SCREEN_WIDTH 400
#define SCREEN_HEIGHT 240

static C2D_SpriteSheet spriteSheet;

int main(int argc, char* argv[])
{
    romfsInit();
    gfxInitDefault();
    C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
    C2D_Init(C2D_DEFAULT_MAX_OBJECTS);
    C2D_Prepare();
    consoleInit(GFX_BOTTOM, NULL);
 
    C3D_RenderTarget* top = C2D_CreateScreenTarget(GFX_TOP, GFX_LEFT);
 
    spriteSheet = C2D_SpriteSheetLoad("romfs:/gfx/chimken.t3x");
    if (!spriteSheet) svcBreak(USERBREAK_PANIC); // <-- This causes issues on Citra!!
 
    C2D_Sprite sprite;
    C2D_SpriteFromSheet(&sprite, spriteSheet, 0);
    C2D_SpriteSetCenter(&sprite, 0.5f, 0.5f);
    C2D_SpriteSetPos(&sprite, 100, 120);
    //C2D_SpriteSetScale(&sprite, 4,4);

    printf("Press Start to quit");

    // Main loop
    while (aptMainLoop())
    {
        hidScanInput();

        // Your code goes here
        u32 kDown = hidKeysDown();
        if (kDown & KEY_START)
            break; // break in order to return to hbmenu
    
        C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
        C2D_TargetClear(top, C2D_Color32f(0.0f,0.0f,0.0f,1.0f));
        C2D_SceneBegin(top);
        C2D_DrawSprite(&sprite);
        C3D_FrameEnd(0);
    }
 
    C2D_SpriteSheetFree(spriteSheet);

    C2D_Fini();
    C3D_Fini();
    gfxExit();
    romfsExit();
    return 0;
}

 

[Kwyjor]

I pretty much copied the gpusprites code, but I thought I could shorten it for my needs, apparently not.

Surely the logical course of action is to start with the original code, and then remove elements one at a time until you find what specific omission causes the crash?

 

[Linc0]

I am going to do that, but I'm fairly sure the problem is with my image file, because adding the check under the sprite loading function caused it to crash on emulator, whereas it didn't before.

 

[kijetesantakalu042]

You have to define the sprites in a chimken.t3s file. Something like this

--atlas -f rgba8888 -z auto
chimken,png
chimken2.png

Also make sure that your makefile compiles .t3s to .t3x

 

[Linc0]

It was something way way dumber than that, I forgot to uncomment the romfs lines in the MakeFile