// std headers
#include <stdio.h>

// 3DS headers
#include <3ds.h>
#include <3ds/gfx.h>
#include <3ds/svc.h>

// Citro3D headers
#include <citro3d.h>
#include <c3d/base.h>
#include <c3d/renderqueue.h>

// Lynx headers
#include <3d.h>

#define DISPLAY_TRANSFER_FLAGS \
	(GX_TRANSFER_FLIP_VERT(0) | GX_TRANSFER_OUT_TILED(0) | GX_TRANSFER_RAW_COPY(0) | \
	GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGBA8) | GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB8) | \
	GX_TRANSFER_SCALING(GX_TRANSFER_SCALE_NO))

C3D_RenderTarget* main_display;

void init_3d(int display) {
    gfxInitDefault();
    C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);

    int width, height;

    gfxScreen_t ds_display;

    if(display == 0){
        width = 240;
        height = 400;
        ds_display = GFX_TOP;
    }else if (display == 1){
        width = 240;
        height = 320;
        ds_display = GFX_BOTTOM;
    }else {
        printf("FATAL ERROR: Invalid display selected!");
        svcBreak(USERBREAK_PANIC);
        return;
    }

    main_display = C3D_RenderTargetCreate(width, height, GPU_RB_RGBA8, GPU_RB_DEPTH24_STENCIL8);
    C3D_RenderTargetSetOutput(main_display, ds_display, GFX_LEFT, DISPLAY_TRANSFER_FLAGS);
}

void render() {
    if(main_display == NULL){
        printf("FATAL ERROR: 3D has not been initialised, or it has been destroyed!");
        svcBreak(USERBREAK_PANIC);
        return;
    }
    C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
    C3D_RenderTargetClear(main_display, C3D_CLEAR_ALL, 0x68B0D8FF, 0);
	C3D_FrameDrawOn(main_display);
}