/*---------------------------------------------------------------------------*
  Project:  TwlSDK - tcl - demos.TWL - tcl-1
  File:     screen.c

  Copyright 2008 Nintendo. All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law. They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date:: 2008-10-07#$
  $Rev: 8888 $
  $Author: onozawa_yuki $
 *---------------------------------------------------------------------------*/
#include <twl.h>
#include "screen.h"
#include "font.h"

/*---------------------------------------------------------------------------*
    Constant Definitions
 *---------------------------------------------------------------------------*/
#define TEXT_SCREEN_SIZE    2048

/*---------------------------------------------------------------------------*
    Internal Variable Definitions
 *---------------------------------------------------------------------------*/

// Virtual screen [number of backgrounds][number of characters]
static u16  gScreen[ 1 ][ TEXT_SCREEN_SIZE / sizeof(u16) ] ATTRIBUTE_ALIGN(32);

/*---------------------------------------------------------------------------*
  Name:         InitScreen

  Description:  Initializes display settings for text display system.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void InitScreen(void)
{
    // Bottom screen settings
    GX_SetBankForSubBG(GX_VRAM_SUB_BG_32_H);
    G2S_SetBG0Control(GX_BG_SCRSIZE_TEXT_256x256, GX_BG_COLORMODE_16, GX_BG_SCRBASE_0x0000, GX_BG_CHARBASE_0x04000,
                      GX_BG_EXTPLTT_01);
    G2S_SetBG0Priority(0);
    GXS_SetGraphicsMode(GX_BGMODE_0);
    GXS_SetVisiblePlane(GX_PLANEMASK_BG0);
    GXS_LoadBG0Char(d_CharData, 0, sizeof(d_CharData));
    GXS_LoadBGPltt(d_PaletteData, 0, sizeof(d_PaletteData));
    ((u16*)HW_DB_PLTT)[0] = 0x0000; // Black
    MI_CpuFillFast(gScreen[0], 0, TEXT_SCREEN_SIZE);
    DC_StoreRange(gScreen[0], TEXT_SCREEN_SIZE);
    GXS_LoadBG0Scr(gScreen[0], 0, TEXT_SCREEN_SIZE);
}

/*---------------------------------------------------------------------------*
  Name:         ClearScreen

  Description:  Clears text display from the screen.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void ClearScreen(void)
{
    MI_CpuClearFast(gScreen[0], TEXT_SCREEN_SIZE);
}

/*---------------------------------------------------------------------------*
  Name:         PrintSubScreen

  Description:  Outputs text to the sub-screen.

  Arguments:    text: String to be output
                ...: Virtual argument

  Returns:      None.
 *---------------------------------------------------------------------------*/
void PutScreen(s32 x, s32 y, u8 palette, char* text, ...)
{
    va_list vlist;
    char    temp[33];
    s32     i;

    MI_CpuClear(temp, sizeof(temp));
    va_start(vlist, text);
    (void)vsnprintf(temp, 33, text, vlist);
    va_end(vlist);

    for (i = 0; i < 32; i++)
    {
        if (temp[i] == 0x00)
        {
            break;
        }

        gScreen[0][((y * 32) + x + i) % (32 * 32)] = (u16) (palette << 12 | temp[i]);
    }
}

/*---------------------------------------------------------------------------*
  Name:         UpdateScreen

  Description:  Applies the virtual screen content to VRAM.
                Assumed to be called during the V-Blank period.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void UpdateScreen(void)
{
    // Applies the virtual screen content to V-RAM
    DC_StoreRange(gScreen[0], TEXT_SCREEN_SIZE);
    GXS_LoadBG0Scr(gScreen[0], 0, TEXT_SCREEN_SIZE);
}

/*---------------------------------------------------------------------------*
  End of file
 *---------------------------------------------------------------------------*/