CWE-ou-minkata/Sources/Plasma/PubUtilLib/plPipeline/DX/plDXTextFont.cpp

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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plDXTextFont Class Functions                                             //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  2.19.2001 mcn - Created.                                                 //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "HeadSpin.h"
#include "hsWindows.h"

#include <d3d9.h>
#include <ddraw.h>
#include <d3dx9mesh.h>

#include "plPipeline/hsWinRef.h"
#include "plDXTextFont.h"
#include "plDXPipeline.h"


//// Local Stuff //////////////////////////////////////////////////////////////

static const long PLD3D_FONTFVF = D3DFVF_XYZ | D3DFVF_DIFFUSE 
                                | D3DFVF_TEX1 | D3DFVF_TEXCOORDSIZE3(0);

static D3DXMATRIX d3dIdentityMatrix( 1.0f, 0.0f, 0.0f, 0.0f,
                                     0.0f, 1.0f, 0.0f, 0.0f,
                                     0.0f, 0.0f, 1.0f, 0.0f,
                                     0.0f, 0.0f, 0.0f, 1.0f );

// Following number needs to be at least: 64 chars max in plTextFont drawn at any one time
//                                      * 4 primitives per char max (for bold text)
//                                      * 3 verts per primitive

//const uint32_t  kNumVertsInBuffer(32768);
const uint32_t    kNumVertsInBuffer(4608);

// See the declaration for plFontVertex in plTextFont.h for info
const DWORD plDXTextFont::kFVF = D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1 | D3DFVF_TEXCOORDSIZE3(0);

IDirect3DVertexBuffer9*     plDXTextFont::fBuffer = nil;
uint32_t                      plDXTextFont::fBufferCursor = 0;

//// Constructor & Destructor /////////////////////////////////////////////////

plDXTextFont::plDXTextFont( plPipeline *pipe, IDirect3DDevice9 *device ) : plTextFont( pipe )
{
    fDevice = device;
    fD3DTexture = nil;

    fOldStateBlock = fTextStateBlock = 0;
}

plDXTextFont::~plDXTextFont()
{
    DestroyObjects();
}

//// ICreateTexture ///////////////////////////////////////////////////////////

void    plDXTextFont::ICreateTexture( uint16_t *data )
{
    HRESULT         hr;
    D3DLOCKED_RECT  lockInfo;
    D3DCAPS9        d3dCaps;

    
    // Check to make sure we can support it
    fDevice->GetDeviceCaps( &d3dCaps );
    hsAssert( fTextureWidth <= d3dCaps.MaxTextureWidth, "Cannot initialize DX font--texture size too big" );

    // Create our texture object
    hr = fDevice->CreateTexture( fTextureWidth, fTextureHeight, 1, 0, D3DFMT_A4R4G4B4, D3DPOOL_MANAGED, &fD3DTexture, NULL );
    hsAssert( !FAILED( hr ), "Cannot create D3D texture" );

    // Lock the texture and write our values out
    fD3DTexture->LockRect( 0, &lockInfo, 0, 0 );
    memcpy( lockInfo.pBits, data, fTextureWidth * fTextureHeight * sizeof( uint16_t ) );
    fD3DTexture->UnlockRect( 0 );
}

void plDXTextFont::CreateShared(IDirect3DDevice9* device)
{
    if( FAILED( device->CreateVertexBuffer( sizeof( plFontVertex ) * kNumVertsInBuffer,
        D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, 0, D3DPOOL_DEFAULT, &fBuffer, NULL ) ) )
    {
        hsAssert( false, "CreateVertexBuffer() call failed!" );
    }
}

void plDXTextFont::ReleaseShared(IDirect3DDevice9* device)
{
    ReleaseObject( fBuffer );
}

//// IInitStateBlocks /////////////////////////////////////////////////////////

void    plDXTextFont::IInitStateBlocks( void )
{

    for( int i = 0; i < 2; i++ )
    {
        fDevice->BeginStateBlock();
        fDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
        fDevice->SetRenderState( D3DRS_SRCBLEND,   D3DBLEND_SRCALPHA );
        fDevice->SetRenderState( D3DRS_DESTBLEND,  D3DBLEND_INVSRCALPHA );
        fDevice->SetRenderState( D3DRS_ALPHATESTENABLE,  TRUE );
        fDevice->SetRenderState( D3DRS_ALPHAREF,         0x08 );
        fDevice->SetRenderState( D3DRS_ALPHAFUNC,  D3DCMP_GREATEREQUAL );
        fDevice->SetRenderState( D3DRS_FILLMODE,   D3DFILL_SOLID );
        fDevice->SetRenderState( D3DRS_CULLMODE,   D3DCULL_CCW );

        fDevice->SetRenderState( D3DRS_ZENABLE,      TRUE );
        fDevice->SetRenderState( D3DRS_ZFUNC,        D3DCMP_ALWAYS );
        fDevice->SetRenderState( D3DRS_ZWRITEENABLE, TRUE );
        fDevice->SetRenderState( D3DRS_DEPTHBIAS, 0 );

        fDevice->SetRenderState( D3DRS_STENCILENABLE,    FALSE );
        fDevice->SetRenderState( D3DRS_CLIPPING,         TRUE );
        fDevice->SetRenderState( D3DRS_ANTIALIASEDLINEENABLE,    FALSE );
        fDevice->SetRenderState( D3DRS_VERTEXBLEND,      FALSE );
        fDevice->SetRenderState( D3DRS_INDEXEDVERTEXBLENDENABLE, FALSE );
        fDevice->SetRenderState( D3DRS_FOGENABLE,        FALSE );
        fDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_MODULATE );
        fDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
        fDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
        fDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP,   D3DTOP_MODULATE );
        fDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
        fDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
        fDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_POINT );
        fDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_POINT );
        fDevice->SetSamplerState( 0, D3DSAMP_MIPFILTER, D3DTEXF_NONE );
        fDevice->SetTextureStageState( 0, D3DTSS_TEXCOORDINDEX, 0 );
        fDevice->SetTextureStageState( 0, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_COUNT2 );
        fDevice->SetTextureStageState( 1, D3DTSS_COLOROP,   D3DTOP_DISABLE );
        fDevice->SetTextureStageState( 1, D3DTSS_ALPHAOP,   D3DTOP_DISABLE );
        fDevice->SetRenderState( D3DRS_LIGHTING, FALSE );   

        if( i == 0 )
            fDevice->EndStateBlock( &fOldStateBlock );
        else
            fDevice->EndStateBlock( &fTextStateBlock );
    }
}

//// DestroyObjects ///////////////////////////////////////////////////////////

void    plDXTextFont::DestroyObjects()
{
    ReleaseObject(fOldStateBlock);
    ReleaseObject(fTextStateBlock);
    ReleaseObject(fD3DTexture);

    fOldStateBlock = fTextStateBlock = 0;
    fD3DTexture = nil;
    fInitialized = false;
}

//// IDrawPrimitive ///////////////////////////////////////////////////////////

void    plDXTextFont::IDrawPrimitive( uint32_t count, plFontVertex *array )
{
    plFontVertex        *v;

    if( !fBuffer )
        return;

    /// Lock the buffer and write to it
    if( fBufferCursor && (fBufferCursor + count * 3 < kNumVertsInBuffer) )
    {
        // We can lock part of it
        if( FAILED( fBuffer->Lock( fBufferCursor * sizeof( plFontVertex ), 
                                    count * 3 * sizeof( plFontVertex ),
                                    (void **)&v, D3DLOCK_NOOVERWRITE ) ) )
        {
            hsAssert( false, "Failed to lock vertex buffer for writing" );
            return;
        }

        fBufferCursor += count * 3;
    }
    else
    {
        // Gotta start over
        FlushDraws();
        fBufferCursor = count * 3;

        if( FAILED( fBuffer->Lock( 0, count * 3 * sizeof( plFontVertex ),
                                    (void **)&v, D3DLOCK_DISCARD ) ) )
        {
            hsAssert( false, "Failed to lock vertex buffer for writing" );
            return;
        }
    }

    if( v != nil && array != nil )
    {
        memcpy( v, array, count * sizeof( plFontVertex ) * 3 );
    }

    fBuffer->Unlock();
}

//// IDrawLines ///////////////////////////////////////////////////////////////

void    plDXTextFont::IDrawLines( uint32_t count, plFontVertex *array )
{
    if( !fBuffer )
        return;

    if( count == 0 || array == nil )
        return;

    fDevice->SetVertexShader(NULL);
    fDevice->SetFVF(kFVF);
    fDevice->SetStreamSource(0, fBuffer, 0, sizeof(plFontVertex));
    fDevice->DrawPrimitiveUP( D3DPT_LINELIST, count, (const void *)array, sizeof( plFontVertex ) );
}

//// FlushDraws ///////////////////////////////////////////////////////////////
//  Flushes out and finishes any drawing left to be done.

void    plDXTextFont::FlushDraws( void )
{
    if( !fBuffer )
        return;

    if( fBufferCursor > 0 )
    {
        fDevice->SetVertexShader( NULL );
        fDevice->SetFVF(kFVF);
        fDevice->SetStreamSource( 0, fBuffer, 0, sizeof( plFontVertex ) );
        fDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, fBufferCursor / 3 );
        fBufferCursor = 0;
    }
}

//// SaveStates ///////////////////////////////////////////////////////////////

void    plDXTextFont::SaveStates( void )
{
    if( !fInitialized )
        IInitObjects();

    if (fOldStateBlock)
        fOldStateBlock->Capture();
    if (fTextStateBlock)
        fTextStateBlock->Apply();

    fDevice->SetTexture( 0, fD3DTexture );
    fDevice->SetTransform( D3DTS_TEXTURE0, &d3dIdentityMatrix );

    /// Set up the transform matrices so that the vertices can range (0-screenWidth,0-screenHeight)
    fDevice->SetTransform( D3DTS_WORLD, &d3dIdentityMatrix );
    fDevice->SetTransform( D3DTS_VIEW, &d3dIdentityMatrix );
    D3DXMATRIX  mat;
    mat = d3dIdentityMatrix;
    mat(0,0) = 2.0f / (float)fPipe->Width();
    mat(1,1) = -2.0f / (float)fPipe->Height();
    mat(3,0) = -1.0;
    mat(3,1) = 1.0;
    fDevice->SetTransform( D3DTS_PROJECTION, &mat );
}

//// RestoreStates ////////////////////////////////////////////////////////////

void    plDXTextFont::RestoreStates( void )
{
    if (fOldStateBlock)
        fOldStateBlock->Apply();
    
    fDevice->SetTexture( 0, nil );
    fDevice->SetTransform( D3DTS_TEXTURE0, &d3dIdentityMatrix );
}