/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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 or by snail mail at:
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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plTextFont Class Functions                                               //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  2.19.2001 mcn - Created.                                                 //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "hsWindows.h"
#include "HeadSpin.h"
#include "plTextFont.h"
#include "plDebugText.h"

#define DisplayableChar(c) (c >= 0 && c <= 128)

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

plTextFont::plTextFont( plPipeline *pipe )
{
    fMaxNumIndices = 1024;
    fInitialized = false;
    fPipe = pipe;
}

plTextFont::~plTextFont()
{
    IUnlink();
}

//// IInitFontTexture /////////////////////////////////////////////////////////

uint16_t  *plTextFont::IInitFontTexture( void )
{
    int     nHeight, x, y, c;
    char    myChar[ 2 ] = "x";
    uint16_t  *tBits;

    DWORD       *bitmapBits;
    BITMAPINFO  bmi;
    HDC         hDC;
    HBITMAP     hBitmap;
    HFONT       hFont;
    SIZE        size;
    BYTE        bAlpha;

    
    // Figure out our texture size
    if( fSize > 40 )
        fTextureWidth = fTextureHeight = 1024;
    else if( fSize > 20 )
        fTextureWidth = fTextureHeight = 512;
    else
        fTextureWidth = fTextureHeight = 256;


    // Create a new DC and bitmap that we can draw characters to
    memset( &bmi.bmiHeader, 0, sizeof( BITMAPINFOHEADER ) );
    bmi.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
    bmi.bmiHeader.biWidth = fTextureWidth;
    bmi.bmiHeader.biHeight = -(int)fTextureHeight;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biCompression = BI_RGB;
    bmi.bmiHeader.biBitCount = 32;
    
    hDC = CreateCompatibleDC( nil );
    hBitmap = CreateDIBSection( hDC, &bmi, DIB_RGB_COLORS, (void **)&bitmapBits, nil, 0 );
    SetMapMode( hDC, MM_TEXT );

    nHeight = -MulDiv( fSize, GetDeviceCaps( hDC, LOGPIXELSY ), 72 );
    fFontHeight = -nHeight;

    hFont = CreateFont( nHeight, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
                        CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY, VARIABLE_PITCH, fFace );
    hsAssert( hFont != nil, "Cannot create Windows font" );

    SelectObject( hDC, hBitmap );
    SelectObject( hDC, hFont );

    // Set text colors
    SetTextColor( hDC, RGB( 255, 255, 255 ) );
    SetBkColor( hDC, 0 );
    SetTextAlign( hDC, TA_TOP );

    // Loop through characters, drawing them one at a time
    RECT    r;
    r.left = r.top = 0;
    r.right = r.bottom = 10;
    FillRect( hDC, &r, (HBRUSH)GetStockObject( GRAY_BRUSH ) );

    // (Make first character a black dot, for filling rectangles)
    SetPixel( hDC, 0, 0, RGB( 255, 255, 255 ) );
    for( c = 32, x = 1, y = 0; c < 127; c++ )
    {
        myChar[ 0 ] = c;
        GetTextExtentPoint32( hDC, myChar, 1, &size );

        if( (uint32_t)( x + size.cx + 1 ) > fTextureWidth )
        {
            x = 0;
            y += size.cy + 1;
        }

        ExtTextOut( hDC, x, y, ETO_OPAQUE, nil, myChar, 1, nil );

        fCharInfo[ c ].fW = (uint16_t)size.cx;
        fCharInfo[ c ].fH = (uint16_t)size.cy;
        fCharInfo[ c ].fUVs[ 0 ].fX = (float)x / (float)fTextureWidth;
        fCharInfo[ c ].fUVs[ 0 ].fY = (float)y / (float)fTextureHeight;
        fCharInfo[ c ].fUVs[ 1 ].fX = (float)( x + size.cx ) / (float)fTextureWidth;
        fCharInfo[ c ].fUVs[ 1 ].fY = (float)( y + size.cy ) / (float)fTextureHeight;
        fCharInfo[ c ].fUVs[ 0 ].fZ = fCharInfo[ c ].fUVs[ 1 ].fZ = 0;

        x += size.cx + 1;
    }
    fCharInfo[ 32 ].fUVs[ 1 ].fX = fCharInfo[ 32 ].fUVs[ 0 ].fX;

    // Special case the tab key
    fCharInfo[ '\t' ].fUVs[ 1 ].fX = fCharInfo[ '\t' ].fUVs[ 0 ].fX = fCharInfo[ 32 ].fUVs[ 0 ].fX;
    fCharInfo[ '\t' ].fUVs[ 1 ].fY = fCharInfo[ '\t' ].fUVs[ 0 ].fY = 0;
    fCharInfo[ '\t' ].fUVs[ 0 ].fZ = fCharInfo[ '\t' ].fUVs[ 1 ].fZ = 0;
    fCharInfo[ '\t' ].fW = fCharInfo[ 32 ].fW * 4;
    fCharInfo[ '\t' ].fH = fCharInfo[ 32 ].fH;

    /// Now create the data block
    uint16_t  *data = TRACKED_NEW uint16_t[ fTextureWidth * fTextureHeight ];
    tBits = data;
    for( y = 0; y < fTextureHeight; y++ )
    {
        for( x = 0; x < fTextureWidth; x++ )
        {
            bAlpha = (BYTE)( ( bitmapBits[ fTextureWidth * y + x ] & 0xff ) >> 4 );

            if( bitmapBits[ fTextureWidth * y + x ] )
                *tBits = 0xffff;
            else
                *tBits = 0;

            tBits++;
        }
    }

    // Cleanup and return
    DeleteObject( hBitmap );
    DeleteDC( hDC );
    DeleteObject( hFont );

    return data;
}

//// Create ///////////////////////////////////////////////////////////////////

void    plTextFont::Create( char *face, uint16_t size )
{
    // Init normal stuff
    strncpy( fFace, face, sizeof( fFace ) );
    fSize = size;
}

//// IInitObjects /////////////////////////////////////////////////////////////

void    plTextFont::IInitObjects( void )
{
    uint16_t  *data;


    // Create texture
    data = IInitFontTexture();
    hsAssert( data != nil, "Cannot create font texture" );

    ICreateTexture( data );
    delete [] data;

    // Create state blocks
    IInitStateBlocks();

    fInitialized = true;
}

//// DrawString ///////////////////////////////////////////////////////////////

void    plTextFont::DrawString( const char *string, int sX, int sY, uint32_t hexColor, 
                                uint8_t style, uint32_t rightEdge )
{
    static hsTArray<plFontVertex>   verts;
    
    int     i, j, width, height, count, thisCount, italOffset;
    float   x = (float)sX;
    char    c, *strPtr;


    if( !fInitialized )
        IInitObjects();

    /// Set up to draw
    italOffset = ( style & plDebugText::kStyleItalic ) ? fSize / 2: 0;
    count = strlen( string );
    strPtr = (char *)string;
    while( count > 0 )
    {
        thisCount = ( count > 64 ) ? 64 : count;
        count -= thisCount;

        // Create an array for our vertices
        verts.SetCountAndZero( thisCount * ( ( style & plDebugText::kStyleBold ) ? 12 : 6 ) );
    
        // Fill them all up now
        for( i = 0; i < thisCount * ( ( style & plDebugText::kStyleBold ) ? 12 : 6 ); i++ )
        {
            verts[ i ].fColor = hexColor;
            verts[ i ].fPoint.fZ = 0;
        }

        for( i = 0, j = 0; i < thisCount; i++, j += 6 )
        {
            c = strPtr[ i ];
            // make sure its a character we will display
            if ( DisplayableChar(c) )
            {
                width = fCharInfo[ c ].fW + 1;
                height = fCharInfo[ c ].fH + 1;

                if( rightEdge > 0 && x + width + italOffset >= rightEdge )
                {
                    count = 0;
                    thisCount = i;
                    break;
                }

                verts[ j ].fPoint.fX = x + italOffset;
                verts[ j ].fPoint.fY = (float)sY;
                verts[ j ].fUV = fCharInfo[ c ].fUVs[ 0 ];

                verts[ j + 1 ].fPoint.fX = x + width + italOffset;
                verts[ j + 1 ].fPoint.fY = (float)sY;
                verts[ j + 1 ].fUV = fCharInfo[ c ].fUVs[ 0 ];
                verts[ j + 1 ].fUV.fX = fCharInfo[ c ].fUVs[ 1 ].fX;

                verts[ j + 2 ].fPoint.fX = x;
                verts[ j + 2 ].fPoint.fY = (float)sY + height;
                verts[ j + 2 ].fUV = fCharInfo[ c ].fUVs[ 0 ];
                verts[ j + 2 ].fUV.fY = fCharInfo[ c ].fUVs[ 1 ].fY;

                verts[ j + 3 ].fPoint.fX = x;
                verts[ j + 3 ].fPoint.fY = (float)sY + height;
                verts[ j + 3 ].fUV = fCharInfo[ c ].fUVs[ 0 ];
                verts[ j + 3 ].fUV.fY = fCharInfo[ c ].fUVs[ 1 ].fY;

                verts[ j + 4 ].fPoint.fX = x + width + italOffset;
                verts[ j + 4 ].fPoint.fY = (float)sY;
                verts[ j + 4 ].fUV = fCharInfo[ c ].fUVs[ 0 ];
                verts[ j + 4 ].fUV.fX = fCharInfo[ c ].fUVs[ 1 ].fX;

                verts[ j + 5 ].fPoint.fX = x + width;
                verts[ j + 5 ].fPoint.fY = (float)sY + height;
                verts[ j + 5 ].fUV = fCharInfo[ c ].fUVs[ 1 ];

                x += width + 1;
            }
        }

        if( thisCount == 0 )
            break;

        if( style & plDebugText::kStyleBold )
        {
            for( i = 0; i < thisCount * 6; i++, j++ )
            {
                verts[ j ] = verts[ i ];
                verts[ j ].fPoint.fX = verts[ j ].fPoint.fX + 1.0f;
            }
        }

        /// TEMPORARY DEBUG ONLY: see if we can catch this stupid random draw bug
#if 0
        for( i = 0; i < thisCount * ( ( style & plDebugText::kStyleBold ) ? 12 : 6 ); i += 3 )
        {
            for( j = 0; j < 3; j++ )
            {
                hsAssert( verts[ i + j ].fPoint.fX >= 0, "Text point out of range" );
                hsAssert( verts[ i + j ].fPoint.fY >= 0, "Text point out of range" );
                hsAssert( verts[ i + j ].fPoint.fX < 1024, "Text point out of range" );
                hsAssert( verts[ i + j ].fPoint.fY < 768, "Text point out of range" );
            }
            int lt = ( verts[ i ].fPoint.fX < verts[ i + 1 ].fPoint.fX ? verts[ i ].fPoint.fX : verts[ i + 1 ].fPoint.fX );
            lt = ( verts[ i + 2 ].fPoint.fX < lt ? verts[ i + 2 ].fPoint.fX : lt );

            int tp = ( verts[ i ].fPoint.fY < verts[ i + 1 ].fPoint.fY ? verts[ i ].fPoint.fY : verts[ i + 1 ].fPoint.fY );
            tp = ( verts[ i + 2 ].fPoint.fY < tp ? verts[ i + 2 ].fPoint.fY : tp );

            int rt = ( verts[ i ].fPoint.fX > verts[ i + 1 ].fPoint.fX ? verts[ i ].fPoint.fX : verts[ i + 1 ].fPoint.fX );
            rt = ( verts[ i + 2 ].fPoint.fX > rt ? verts[ i + 2 ].fPoint.fX : rt );

            int bt = ( verts[ i ].fPoint.fY > verts[ i + 1 ].fPoint.fY ? verts[ i ].fPoint.fY : verts[ i + 1 ].fPoint.fY );
            bt = ( verts[ i + 2 ].fPoint.fY > bt ? verts[ i + 2 ].fPoint.fY : bt );

            hsAssert( rt - lt < 32, "Text character too big" );
            hsAssert( bt - tp < 32, "Text character too big" );
        }
#endif
        /// TEMPORARY DEBUG ONLY: see if we can catch this stupid random draw bug

        
        /// Draw a set of tris now
        IDrawPrimitive( thisCount * ( ( style & plDebugText::kStyleBold ) ? 4 : 2 ), verts.AcquireArray() );

        strPtr += thisCount;
    }

    /// All done!
}

//// CalcStringWidth //////////////////////////////////////////////////////////

uint32_t  plTextFont::CalcStringWidth( const char *string )
{
    int     i, width = 0;


    if( !fInitialized )
        IInitObjects();
    
    for( i = 0; i < strlen( string ); i++ )
    {
        // make sure its a character we will display
        if ( DisplayableChar(string[i]) )
            width += fCharInfo[ string[ i ] ].fW + 2;
    }

    return width;
}

//// DrawRect /////////////////////////////////////////////////////////////////
//  TEMPORARY function to draw a flat-shaded 2D rectangle to the screen. Used
//  to create a background for our console; will be obliterated once we figure
//  a better way to do so.

void    plTextFont::DrawRect( int left, int top, int right, int bottom, uint32_t hexColor )
{
    static hsTArray<plFontVertex>   verts;
    int                             i;


    if( !fInitialized )
        IInitObjects();

    /// Draw!
    verts.SetCountAndZero( 6 );
    for( i = 0; i < 6; i++ )
    {
        verts[ i ].fColor = hexColor;
        verts[ i ].fPoint.fZ = 0;
        verts[ i ].fUV.fX = verts[ i ].fUV.fY = 0;
    }

    verts[ 0 ].fPoint.fX = verts[ 2 ].fPoint.fX = verts[ 3 ].fPoint.fX = (float)left;
    verts[ 1 ].fPoint.fX = verts[ 4 ].fPoint.fX = verts[ 5 ].fPoint.fX = (float)right;
    verts[ 0 ].fPoint.fY = verts[ 1 ].fPoint.fY = verts[ 4 ].fPoint.fY = (float)top;
    verts[ 2 ].fPoint.fY = verts[ 3 ].fPoint.fY = verts[ 5 ].fPoint.fY = (float)bottom;

    // omg I had this at 6...just slap the dunce cap on me...-mcn
    IDrawPrimitive( 2, verts.AcquireArray() );

    /// All done!
}

//// Draw3DBorder /////////////////////////////////////////////////////////////
//  Draws a 3d border, upper-left with the first color, lower-right with the
//  second. I just LOOOOVE temporary functions :)
//  Note: this way sucks. Live with it.

void    plTextFont::Draw3DBorder( int left, int top, int right, int bottom, uint32_t hexColor1, uint32_t hexColor2 )
{
    static hsTArray<plFontVertex>   verts;
    int                             i;


    if( !fInitialized )
        IInitObjects();

    /// Draw!
    verts.SetCountAndZero( 8 );
    for( i = 0; i < 8; i++ )
    {
        verts[ i ].fColor = hexColor1;
        verts[ i ].fPoint.fZ = 0;
        verts[ i ].fUV.fX = verts[ i ].fUV.fY = 0;
    }

    verts[ 1 ].fPoint.fX = verts[ 2 ].fPoint.fX = verts[ 3 ].fPoint.fX = verts[ 4 ].fPoint.fX = (float)left;
    verts[ 0 ].fPoint.fX = verts[ 5 ].fPoint.fX = verts[ 6 ].fPoint.fX = verts[ 7 ].fPoint.fX = (float)right;

    verts[ 0 ].fPoint.fY = verts[ 1 ].fPoint.fY = verts[ 2 ].fPoint.fY = verts[ 7 ].fPoint.fY = (float)top;
    verts[ 3 ].fPoint.fY = verts[ 4 ].fPoint.fY = verts[ 5 ].fPoint.fY = verts[ 6 ].fPoint.fY = (float)bottom;

    for( i = 4; i < 8; i++ )
        verts[ i ].fColor = hexColor2;

    IDrawLines( 4, verts.AcquireArray() );

    /// All done!
}