/*---------------------------------------------------------------------------*
  Project:  TwlSDK - GX - demos - UnitTours/2D_Oam_2
  File:     main.c

  Copyright 2003-2008 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.

  $Date:: 2008-09-18#$
  $Rev: 8573 $
  $Author: okubata_ryoma $
 *---------------------------------------------------------------------------*/

//---------------------------------------------------------------------------
// A sample that rotates an OBJ:
//
// USAGE:
//   LEFT, L: Turn left
//   RIGHT,R: Turn right
//
// HOWTO:
// 1. Set up the character/palette/attribute data same as 2D_Oam_1
// 2. Set up a matrix with G2_SetOBJAffine
//---------------------------------------------------------------------------

#ifdef SDK_TWL
#include <twl.h>
#else
#include <nitro.h>
#endif
#include "DEMO.h"
#include "data.h"

static GXOamAttr sOamBak[128];         // buffer for OAM

#ifdef SDK_TWL
void TwlMain(void)
#else
void NitroMain(void)
#endif
{
    u16     rotate = 0;

    //---------------------------------------------------------------------------
    // Initialize:
    // Enable IRQ interrupts, initialize VRAM, and make OBJ visible
    //---------------------------------------------------------------------------
    DEMOInitCommon();
    DEMOInitVRAM();
    DEMOInitDisplayOBJOnly();

    //---------------------------------------------------------------------------
    // Transmitting the character data and the palette data
    //---------------------------------------------------------------------------
    GX_LoadOBJ(d_64_256_obj_schDT, 0, sizeof(d_64_256_obj_schDT));
    GX_LoadOBJPltt(d_64_256_obj_sclDT, 0, sizeof(d_64_256_obj_sclDT));

    MI_DmaFill32(3, sOamBak, 192, sizeof(sOamBak));     // Let out of the screen if not display

    DEMOStartDisplay();
    //---------------------------------------------------------------------------
    // Main Loop
    //---------------------------------------------------------------------------
    while (1)
    {
        DEMOReadKey();

        if (DEMO_IS_PRESS(PAD_KEY_RIGHT))
            rotate += 256;
        if (DEMO_IS_PRESS(PAD_KEY_LEFT))
            rotate -= 256;
        if (DEMO_IS_PRESS(PAD_BUTTON_R))
            rotate += 256;
        if (DEMO_IS_PRESS(PAD_BUTTON_L))
            rotate -= 256;
        if (DEMO_IS_TRIG(PAD_BUTTON_SELECT))
            rotate = 0;

        G2_SetOBJAttr(&sOamBak[0],     // a pointer to the attributes
                      60,              // x
                      35,              // y
                      0,               // priority
                      GX_OAM_MODE_NORMAL,       // OBJ mode
                      FALSE,           // mosaic
                      GX_OAM_EFFECT_AFFINE,     // flip/affine/no display/affine(double)
                      GX_OAM_SHAPE_64x64,       // size and shape
                      GX_OAM_COLORMODE_256,     // OBJ character data are in 256-color format
                      0,               // character name
                      0,               // color param
                      0                // affine param
            );

        {
            fx16    sinVal, cosVal;
            MtxFx22 mtx;
            GXOamAffine *tmp = (GXOamAffine *)(&sOamBak[0]);

            sinVal = FX_SinIdx(rotate);
            cosVal = FX_CosIdx(rotate);
            mtx._00 = cosVal;
            mtx._01 = sinVal;
            mtx._10 = -sinVal;
            mtx._11 = cosVal;
            G2_SetOBJAffine(tmp, &mtx);
        }

        // Store the data in the main memory, and invalidate the cache
        DC_FlushRange(sOamBak, sizeof(sOamBak));
        /* I/O register is accessed using DMA operation, so cache wait is not needed */
        // DC_WaitWriteBufferEmpty();

#ifdef SDK_AUTOTEST
        rotate = 4098;                 // Default params for testing
        GX_SetBankForLCDC(GX_VRAM_LCDC_C);
        EXT_TestSetVRAMForScreenShot(GX_VRAM_LCDC_C);
        EXT_TestScreenShot(100, 0x2F6D8647);
        EXT_TestTickCounter();
#endif //SDK_AUTOTEST

        OS_WaitVBlankIntr();           // Waiting for the end of the V-Blank interrupt

        GX_LoadOAM(sOamBak, 0, sizeof(sOamBak));
    }
}

//---------------------------------------------------------------------------
// V-Blank interrupt function:
//
// Interrupt handlers are registered on the interrupt table by OS_SetIRQFunction.
// OS_EnableIrqMask selects IRQ interrupts to enable, and
// OS_EnableIrq enables IRQ interrupts.
// Notice that you have to call 'OS_SetIrqCheckFlag' to check a VBlank interrupt.
//---------------------------------------------------------------------------
void VBlankIntr(void)
{
    OS_SetIrqCheckFlag(OS_IE_V_BLANK); // Checking V-Blank interrupt
}