/*---------------------------------------------------------------------------*
  File:       simple.c

  Copyright (C) 2007 Nintendo. All rights reserved.

 *---------------------------------------------------------------------------*/
#include <stdio.h>                      // size_t
#include <string.h>
#include <wstring.h>

#include <revolution.h>
#define DEMO_USE_MEMLIB 1
#include <demo.h>
#include <revolution/kpad.h>

static void* AllocFromPadHeap( u32 size );
static u8    FreeToPadHeap   ( void* ptr );

/*---------------------------------------------------------------------------*
  Name:         Main

  Arguments:    None.
                
  Description:  The application's main loop.
                
  Returns:      None.
 *---------------------------------------------------------------------------*/
void main ( int argc, char* argv[] )
{
#pragma unused( argc , argv )
    GXColor Black  = {0, 0, 0, 0};
    KPADStatus input;

    // Demo init
    DEMOInit(NULL);
    // Font init
    (void)DEMOInitROMFont();	// Use IPL ROM font
    GXSetCopyClear(Black, 0x00ffffff);
    GXCopyDisp(DEMOGetCurrentBuffer(), GX_TRUE);

    // Initialize KPAD
    WPADRegisterAllocator( AllocFromPadHeap, FreeToPadHeap );
    KPADInit();
    
    memset( &input, 0, sizeof(KPADStatus) );

    // Main loop
    while (1) {
        GXRenderModeObj* rmp;

        KPADRead( WPAD_CHAN0, &input, 1 );
        
        DEMOBeforeRender();

        // None

        rmp = DEMOGetRenderModeObj();
        DEMOInitCaption(DM_FT_XLU, (s16) rmp->fbWidth, (s16) rmp->efbHeight);
        DEMOSetFontType(DM_FT_XLU);
        DEMOSetROMFontSize(32, -1);

        DEMORFPrintf(32, 128, 0, "Push HOME button" );
        DEMORFPrintf(64, 160, 0, "to return to Wii Menu." );
        
        DEMODoneRender();

        // If HOME is pressed, return to the Wii Menu
        if ( input.trig & KPAD_BUTTON_HOME )
        {
            VISetBlack( TRUE );
            VIFlush();
            VIWaitForRetrace();
            OSReturnToMenu();
        }
    }
}


/*---------------------------------------------------------------------------*
  Name        : AllocFromPadHeap
  Description : Dynamically allocates memory for the WPAD library.
  Arguments   : size: Size of memory to allocate (in bytes)
  Returns     : void*: Start address of the allocated memory.
 *---------------------------------------------------------------------------*/
static void* AllocFromPadHeap( u32 size )
{
    return MEMAllocFromAllocator( &DemoAllocator2, size );
}


/*---------------------------------------------------------------------------*
  Name        : FreeToPadHeap
  Description : Deallocates memory dynamically allocated for the WPAD library.
  Arguments   : ptr: Start address of the memory to deallocate
  Returns     : u8: Returns 0 if the attempt to deallocate memory fails.
 *---------------------------------------------------------------------------*/
static u8 FreeToPadHeap( void* ptr )
{
    if ( !ptr )
    {
        return 0;
    }
    
    MEMFreeToAllocator( &DemoAllocator2, ptr );
    ptr = NULL;
    
    return 1;
}