// SPDX-License-Identifier: CC0-1.0
//
// SPDX-FileContributor: NightFox & Co., 2009-2011
//
// Draw 16-bit images
// http://www.nightfoxandco.com

#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <nds.h>
#include <filesystem.h>

#include <nf_lib.h>

int main(int argc, char **argv)
{
    // Prepare a NitroFS initialization screen
    NF_Set2D(0, 0);
    NF_Set2D(1, 0);
    consoleDemoInit();
    printf("\n NitroFS init. Please wait.\n\n");
    printf(" Iniciando NitroFS,\n por favor, espere.\n\n");
    swiWaitForVBlank();

    // Initialize NitroFS and set it as the root folder of the filesystem
    nitroFSInit(NULL);
    NF_SetRootFolder("NITROFS");

    // Initialize 2D engine in both screens and use mode 5
    NF_Set2D(0, 5);
    NF_Set2D(1, 5);

    // Initialize bitmap backgrounds system
    NF_InitBitmapBgSys(0, 1);
    NF_InitBitmapBgSys(1, 1);

    // Initialize storage buffers
    NF_Init16bitsBgBuffers();

    // Initialize backbuffers
    NF_Init16bitsBackBuffer(0);
    NF_Init16bitsBackBuffer(1);

    // Enable backbuffers
    NF_Enable16bitsBackBuffer(0);
    NF_Enable16bitsBackBuffer(1);

    // Load bitmap files from NitroFS
    NF_Load16bitsBg("bmp/bitmap16", 0);
    NF_Load16bitsImage("bmp/blueball", 1, 64, 64);

    // Load image to VRAM of both screens
    NF_Copy16bitsBuffer(0, 1, 0);
    NF_Copy16bitsBuffer(1, 1, 0);

    // Variables
    s16 x = 0;
    s16 y = 0;
    s8 ix = 1;
    s8 iy = 1;

    while (1)
    {
        // Move ball
        x += ix;
        if ((x <= 0) || (x >= 191))
            ix *= -1;
        y += iy;
        if ((y <= 0) || (y >= 127))
            iy *= -1;

        // Redraw top screen
        NF_Draw16bitsImage(0, 1, x, y, true); // Ball (magenta is transparent)

        // Redraw bottom screen
        NF_Copy16bitsBuffer(1, 1, 0); // Background
        NF_Draw16bitsImage(1, 1, x, y, true); // Ball (magenta is transparent)

        // Wait for the screen refresh
        swiWaitForVBlank();

        // Send backbuffers to the screen
        NF_Flip16bitsBackBuffer(0);
        NF_Flip16bitsBackBuffer(1);
    }

    return 0;
}