/*---------------------------------------------------------------------------*
  Project:  TWL-System - demos - g2d - samples - Renderer_Simple
  File:     main.c

  Copyright 2004-2009 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.

  $Revision: 1155 $
 *---------------------------------------------------------------------------*/

// ============================================================================
//  Explanation of the demo:
//      Sample of cell animation rendering using the Renderer module
//      A pig character is displayed on the screen.
//      
//      Switch the rendering method (2D or 3D) at execution time.
//       However, the materials needed by both rendering methods will be loaded.
//
//  Using the Demo
//      START Button: Switches the cell output method between the object and the software sprite.
//                      
//      A Button: Switches the cell to be displayed (if the cells are available.)
//      X button: Resets scaling, movement, and rotation status of the cell.
//      +Control Pad: Moves the cell.
//      B Button + +Control Pad:
//                      Rotates the cell.
//      Y Button + +Control Pad:
//                      Adjusts cell scaling.
//
// ============================================================================

#include <nitro.h>
#include <nnsys/g2d.h>

#include "g2d_demolib.h"

//------------------------------------------------------------------------------
// Constant Definitions
#define SCREEN_WIDTH                256                     // screen width
#define SCREEN_HEIGHT               192                     // screen height

#define AFFINE_IDX                  3                       // Affine Index for cell
#define CELL_ROTATE_UNIT            0xFF                    // Units of cell rotations
#define CELL_SCALE_UNIT             ((FX32_ONE >> 7) * 3 )  // Units of cell scaling
                                                            // The scaling value is ensured to be not near 0
                                                            // 
#define CELL_INIT_POS_X             (120 << FX32_SHIFT)     // Initial X position of the cell
#define CELL_INIT_POS_Y             (120 << FX32_SHIFT)     // Initial Y position of the cell

#define INIT_OUTPUT_TYPE            NNS_G2D_SURFACETYPE_MAIN2D   // Initial value for output method

#define NUM_OF_OAM                  128                 // Number of OAMs allocated to OAM manager

#define CHARA_BASE                  0x0                 // Character image base address
#define PLTT_BASE                   0x0                 // Palette base address



//------------------------------------------------------------------------------
// Structure definitions

typedef struct CellInfo
{
    u16          cellIdx;   // Number of cell to render
    u16          rotate;    // Rotation angle
    NNSG2dFVec2  scale;     // Scale
    NNSG2dFVec2  pos;       // Position of cell rendering
} CellInfo;


//------------------------------------------------------------------------------
// Global Variables

static NNSG2dImageProxy             sImageProxy;    // Character/texture proxy for cell
static NNSG2dImagePaletteProxy      sPaletteProxy;  // Palette proxy for cell

static NNSG2dOamManagerInstance*    spCurrentOam;   // Manager of OAM subject to callback processing

static NNSG2dAnimBankData*          spAnimBank;     // Animation Bank
static NNSG2dCellAnimation*         spCellAnim;     // cell animation


//------------------------------------------------------------------------------
// Prototype Declarations

void VBlankIntr(void);
static NNSG2dCellDataBank* LoadResources(void);
static void ProcessInput(CellInfo* pCellInfo, NNSG2dSurfaceType* pOutputType, u16 numCells);
static void MakeAffineMatrix(MtxFx22* pMtx, MtxFx22* pMtx2D, const CellInfo* pCellInfo);
static BOOL CallBackAddOam( const GXOamAttr* pOam, u16 affineIndex, BOOL bDoubleAffine );
static u16 CallBackAddAffine( const MtxFx22* mtx );
static void InitOamManager(NNSG2dOamManagerInstance*   pObjOamManager);
static void InitRenderer(
                NNSG2dRendererInstance* pRenderer,
                NNSG2dRenderSurface*    pSurface);


/*---------------------------------------------------------------------------*
  Name:         CallBackAddOam

  Description:  Function called internally by NNS_G2dDraw* functions to add an OAM.

  Arguments:    pOam:           Pointer to OAM to be added.
                affineIndex:    Affine index used by this OAM.
                                May have a value of 32 or greater.
                                If affine is not used,
                                NNS_G2D_OAM_AFFINE_IDX_NONE is specified.
                bDoubleAffine:  Whether in double affine mode.

  Returns:      Returns TRUE if successful; returns FALSE otherwise.
 *---------------------------------------------------------------------------*/
static BOOL CallBackAddOam( const GXOamAttr* pOam, u16 affineIndex, BOOL bDoubleAffine )
{
#pragma unused( bDoubleAffine )
    SDK_NULL_ASSERT( spCurrentOam );
    SDK_NULL_ASSERT( pOam );

    return NNS_G2dEntryOamManagerOamWithAffineIdx( spCurrentOam, pOam, affineIndex );
}

/*---------------------------------------------------------------------------*
  Name:         CallBackAddAffine

  Description:  This function is called to add affine parameters in the
                NNS_G2dDraw* functions.

  Arguments:    mtx:        Pointer to affine transform matrix to be added.

  Returns:      Returns the AffineIndex for referencing added affine parameters
                
 *---------------------------------------------------------------------------*/
static u16 CallBackAddAffine( const MtxFx22* mtx )
{
    SDK_NULL_ASSERT( spCurrentOam );
    SDK_NULL_ASSERT( mtx );
    return NNS_G2dEntryOamManagerAffine( spCurrentOam, mtx );
}

/*---------------------------------------------------------------------------*
  Name:         InitOamManager

  Description:  Initializes the OAM manager system and initializes a single OAM manager instance.
                

  Arguments:    pOamManager:    Pointer to the OAM manager to be initialized.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void InitOamManager(NNSG2dOamManagerInstance*   pOamManager)
{
    BOOL result;
    SDK_NULL_ASSERT( pOamManager );

    NNS_G2dInitOamManagerModule();

	result = NNS_G2dGetNewOamManagerInstanceAsFastTransferMode(
		        pOamManager, 0, NUM_OF_OAM, NNS_G2D_OAMTYPE_MAIN );
    SDK_ASSERT( result );
}

/*---------------------------------------------------------------------------*
  Name:         InitRenderer

  Description:  Initializes Renderer and Surface.

  Arguments:    pRenderer:  Pointer to Renderer to be initialized.
                pSurface:   Pointer to Surface to be initialized.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void InitRenderer(
                NNSG2dRendererInstance* pRenderer,
                NNSG2dRenderSurface*    pSurface)
{
    NNSG2dViewRect* pRect = &(pSurface->viewRect);
    SDK_NULL_ASSERT( pRenderer );
    SDK_NULL_ASSERT( pSurface );

    NNS_G2dInitRenderer( pRenderer );
    NNS_G2dInitRenderSurface( pSurface );
    

    pRect->posTopLeft.x = FX32_ONE * 0;
    pRect->posTopLeft.y = FX32_ONE * 0;
    pRect->sizeView.x = FX32_ONE * SCREEN_WIDTH;
    pRect->sizeView.y = FX32_ONE * SCREEN_HEIGHT;

    pSurface->pFuncOamRegister       = CallBackAddOam;
    pSurface->pFuncOamAffineRegister = CallBackAddAffine;

    NNS_G2dAddRendererTargetSurface( pRenderer, pSurface );
    NNS_G2dSetRendererImageProxy( pRenderer, &sImageProxy, &sPaletteProxy );
}

/*---------------------------------------------------------------------------*
  Name:         LoadResources

  Description:  Loads the animation data, cell bank, character data and palette data from a file, and then loads the character and palette data into VRAM.
                
                

  Arguments:    None.

  Returns:      Pointer to the loaded cell bank.
 *---------------------------------------------------------------------------*/
static NNSG2dCellDataBank* LoadResources(void)
{
    NNSG2dCellDataBank* pCellBank;
    void* pBuf;

    NNS_G2dInitImageProxy( &sImageProxy );
    NNS_G2dInitImagePaletteProxy( &sPaletteProxy );

    //------------------------------------------------------------------------------
    // load cell data
    {
        pBuf = G2DDemo_LoadNCER( &pCellBank, "data/Render_Simple.NCER" );
        SDK_NULL_ASSERT( pBuf );
        // Because the cell bank is used in main memory until the end,
        // this pBuf is not freed.
    }

    //------------------------------------------------------------------------------
    // load animation data
    {
        // This pBuf is not deallocated because cell animation data is used in main memory until the end.
        // 
        pBuf = G2DDemo_LoadNANR( &spAnimBank, "data/Render_Simple.NANR" );
        SDK_NULL_ASSERT( pBuf );

        //
        // Initialize the cell animation instance
        //
        {
            spCellAnim = G2DDemo_GetNewCellAnimation(1);
            SDK_NULL_ASSERT( spCellAnim );

            SDK_NULL_ASSERT( NNS_G2dGetAnimSequenceByIdx(spAnimBank, 0) );

            NNS_G2dInitCellAnimation(
                spCellAnim,
                NNS_G2dGetAnimSequenceByIdx(spAnimBank, 0),
                pCellBank );
        }
    }

    //------------------------------------------------------------------------------
    // load character data for 2D
    {
        NNSG2dCharacterData* pCharData;

        pBuf = G2DDemo_LoadNCGR( &pCharData, "data/Render_Simple.NCGR" );
        SDK_NULL_ASSERT( pBuf );

        // Loading For 2D Graphics Engine
        NNS_G2dLoadImage2DMapping(
            pCharData,
            CHARA_BASE,
            NNS_G2D_VRAM_TYPE_2DMAIN,
            &sImageProxy );

        // Because character data was copied into VRAM,
        // this pBuf is freed. Same below.
        G2DDemo_Free( pBuf );
    }

    // load character data for 3D (software sprite)
    {
        NNSG2dCharacterData* pCharData;

        pBuf = G2DDemo_LoadNCBR( &pCharData, "data/Render_Simple.NCBR" );
        SDK_NULL_ASSERT( pBuf );

        // Loading For 3D Graphics Engine.
        NNS_G2dLoadImage2DMapping(
            pCharData,
            CHARA_BASE,
            NNS_G2D_VRAM_TYPE_3DMAIN,
            &sImageProxy );

        G2DDemo_Free( pBuf );
    }

    //------------------------------------------------------------------------------
    // load palette data
    {
        NNSG2dPaletteData* pPlttData;

        pBuf = G2DDemo_LoadNCLR( &pPlttData, "data/Render_Simple.NCLR" );
        SDK_NULL_ASSERT( pBuf );

        // Loading For 2D Graphics Engine
        NNS_G2dLoadPalette(
            pPlttData,
            PLTT_BASE,
            NNS_G2D_VRAM_TYPE_2DMAIN,
            &sPaletteProxy);

        // Loading For 3D Graphics Engine.
        NNS_G2dLoadPalette(
            pPlttData,
            PLTT_BASE,
            NNS_G2D_VRAM_TYPE_3DMAIN,
            &sPaletteProxy);

        G2DDemo_Free( pBuf );
    }

    return pCellBank;
}


/*---------------------------------------------------------------------------*
  Name:         ProcessInput

  Description:  Changes the cell display status according to the key input.
                Also switches the displayed cell and resets its status.

  Arguments:    pCellInfo:      Pointer to CellInfo reflecting the key input
                pOutputType:    Pointer to a buffer where the output method information is held
                numCells:       Number of cells that can be selected

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void ProcessInput(CellInfo* pCellInfo, NNSG2dSurfaceType* pOutputType, u16 numCells)
{
    SDK_NULL_ASSERT( pCellInfo );
    SDK_NULL_ASSERT( pOutputType );

    G2DDemo_ReadGamePad();

    // Change current Cell
    if( G2DDEMO_IS_TRIGGER(PAD_BUTTON_A) )
    {
       pCellInfo->cellIdx++;
        if( pCellInfo->cellIdx >= numCells )
        {
            pCellInfo->cellIdx = 0;
        }
    }

    // Rotate Cell
    if( G2DDEMO_IS_PRESS(PAD_BUTTON_B) )
    {
        if ( G2DDEMO_IS_PRESS(PAD_KEY_LEFT) )
        {
            pCellInfo->rotate -= CELL_ROTATE_UNIT;      // Counterclockwise
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_RIGHT) )
        {
            pCellInfo->rotate += CELL_ROTATE_UNIT;      // Clockwise
        }
    }

    // Zoom Cell
    if( G2DDEMO_IS_PRESS(PAD_BUTTON_Y) )
    {
        if ( G2DDEMO_IS_PRESS(PAD_KEY_UP) )
        {
            pCellInfo->scale.y += CELL_SCALE_UNIT;   // Expand in Y direction
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_DOWN) )
        {
            pCellInfo->scale.y -= CELL_SCALE_UNIT;   // Reduce in Y direction
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_LEFT) )
        {
            pCellInfo->scale.x += CELL_SCALE_UNIT;   // Expand in X direction
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_RIGHT) )
        {
            pCellInfo->scale.x -= CELL_SCALE_UNIT;   // Reduce in X direction
        }
    }

    // Move Cell
    if( ! G2DDEMO_IS_PRESS(PAD_BUTTON_B) && ! G2DDEMO_IS_PRESS(PAD_BUTTON_Y) )
    {
        if ( G2DDEMO_IS_PRESS(PAD_KEY_UP) )
        {
            pCellInfo->pos.y -= FX32_ONE;
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_DOWN) )
        {
            pCellInfo->pos.y += FX32_ONE;
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_LEFT) )
        {
            pCellInfo->pos.x -= FX32_ONE;
        }
        if ( G2DDEMO_IS_PRESS(PAD_KEY_RIGHT) )
        {
            pCellInfo->pos.x += FX32_ONE;
        }
    }

    // Reset
    if( G2DDEMO_IS_TRIGGER(PAD_BUTTON_X) )
    {
        pCellInfo->rotate      = 0;
        pCellInfo->scale       = (NNSG2dFVec2){FX32_ONE, FX32_ONE};
        pCellInfo->pos         = (NNSG2dFVec2){CELL_INIT_POS_X, CELL_INIT_POS_Y};
    }

    // Toggle Output Type
    if( G2DDEMO_IS_TRIGGER(PAD_BUTTON_START) )
    {
        *pOutputType = (*pOutputType == NNS_G2D_SURFACETYPE_MAIN2D) ?
                            NNS_G2D_SURFACETYPE_MAIN3D:
                            NNS_G2D_SURFACETYPE_MAIN2D;
    }
}

/*---------------------------------------------------------------------------*
  Name:         NitroMain

  Description:  Main function.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void NitroMain(void)
{
    NNSG2dRendererInstance      render;         // Renderer for rendering
    NNSG2dRenderSurface         surface;        // Main screen surface
    NNSG2dCellDataBank*         pCellBank;      // Cell data
    NNSG2dOamManagerInstance    oamManager;     // OAM manager for 2D rendering
    NNSG2dSurfaceType           outputType = INIT_OUTPUT_TYPE;

    
    //-----------------------------------------------
    // Initialize animation
    {
        G2DDemo_CommonInit();
        G2DDemo_CameraSetup();
        G2DDemo_MaterialSetup();
        G2DDemo_PrintInit();
        InitOamManager( &oamManager );
        InitRenderer( &render, &surface );
        pCellBank = LoadResources();
        
        // start display
        {
            SVC_WaitVBlankIntr();
            GX_DispOn();
            GXS_DispOn();
        }
    }

    

    //-----------------------------------------------
    // Main Loop
    while( TRUE )
    {
        static CellInfo cellInfo = {
            0,                                  // Number of cell to render
            0,                                  // Rotation angle
            {FX32_ONE, FX32_ONE},               // Scale
            {CELL_INIT_POS_X, CELL_INIT_POS_Y}  // Position of cell rendering
        };

        //-----------------------------------------------
        // Update display information and output method for cell for which input is read
        ProcessInput(&cellInfo, &outputType, pCellBank->numCells);
        surface.type = outputType;
        
        //-----------------------------------------------
        // Render
        //
        // Render cell using Renderer module
        //
        {
            spCurrentOam = &oamManager;

            NNS_G2dBeginRendering( &render );
                NNS_G2dPushMtx();

                    NNS_G2dTranslate( cellInfo.pos.x, cellInfo.pos.y, 0 );
                    NNS_G2dRotZ( FX_SinIdx( cellInfo.rotate ), FX_CosIdx( cellInfo.rotate ) );
                    NNS_G2dScale( cellInfo.scale.x, cellInfo.scale.y, FX32_ONE );

                    NNS_G2dDrawCellAnimation( spCellAnim );

                NNS_G2dPopMtx();
            NNS_G2dEndRendering();
        }
        
        //-----------------------------------------------
        // Output display information
        {
            G2DDemo_PrintOutf(0, 0, "pos:   x=%3d     y=%3d",
                cellInfo.pos.x >> FX32_SHIFT, cellInfo.pos.y >> FX32_SHIFT);
            G2DDemo_PrintOutf(0, 1, "scale: x=%7.3f y=%7.3f",
                (double)cellInfo.scale.x / FX32_ONE, (double)cellInfo.scale.y / FX32_ONE);
            G2DDemo_PrintOutf(0, 2, "rot:   %5d (%6.2f)",
                cellInfo.rotate, 360.0 * cellInfo.rotate / 0x10000);
            G2DDemo_PrintOut(0, 23, (outputType == NNS_G2D_SURFACETYPE_MAIN2D) ?
                   "OBJ           ": "SoftwareSprite");
        }
        
        //-----------------------------------------------
        // Wait for V-Blank
        G3_SwapBuffers(GX_SORTMODE_AUTO, GX_BUFFERMODE_Z);
        SVC_WaitVBlankIntr();

        //-----------------------------------------------
        //
        // Write buffer contents to HW
        //
        {
            // Display information
            G2DDemo_PrintApplyToHW();

            // Cell
            NNS_G2dApplyOamManagerToHW( &oamManager );
            NNS_G2dResetOamManagerBuffer( &oamManager );
        }

        //-----------------------------------------------
        //
        // update the animation
        //
        NNS_G2dTickCellAnimation( spCellAnim, FX32_ONE );
    }
}

/*---------------------------------------------------------------------------*
  Name:         VBlankIntr

  Description:  Handles VBlank interrupts.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void VBlankIntr(void)
{
    OS_SetIrqCheckFlag( OS_IE_V_BLANK );                   // Checking VBlank interrupt
}


