hud_numeric.cpp

hl2 source code. Do not use it illegal.

		}

		surface()->DrawSetTextPos( xnext, y );

		// Paint from 0.5 to frac of next char
		if ( surface()->DrawGetUnicodeCharRenderInfo( nextchar, info ) )
		{
			// Shift tex coord and y position half way up glyph
			vgui::Vertex_t save[2];
			
			save[0] = info.verts[0];
			save[1] = info.verts[1];

			info.verts[0].m_Position.y = Lerp( 0.5f, save[0].m_Position.y, save[1].m_Position.y );
			info.verts[0].m_TexCoord.y = Lerp( 0.5f, save[0].m_TexCoord.y, save[1].m_TexCoord.y );

			info.verts[1].m_Position.y = Lerp( frac, save[0].m_Position.y, save[1].m_Position.y );
			//info.verts[1].m_TexCoord.y = Lerp( frac, save[0].m_TexCoord.y, save[1].m_TexCoord.y );
			
			surface()->DrawRenderCharFromInfo( info );
		}
	}

	x += cellwidth;
	surface()->DrawSetTextPos( x, y );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *prev - 
//			*next - 
// Output : float
//-----------------------------------------------------------------------------
float CHudNumeric::MaxCharacterDiff( const char *prev, const char *next )
{
	float maxdiff = 0.0f;

	int textlen = Q_strlen( next );
	int prevlen = Q_strlen( prev );
	int ch;
	for ( ch = 0; ch < textlen; ch++ )
	{
		int charfromend = textlen - ch;
		char c = next[ ch ];
		char prevc = prev[ max( 0, prevlen - charfromend ) ];
		if ( prevc == 0 )
		{
			int tempindex = FindPrintableIndex( c );
			if ( tempindex != m_Printables.InvalidIndex() )
			{
				tempindex = max( 0, tempindex - 3 );
				prevc = m_Printables[ tempindex ];
			}
			else
			{
				prevc = c;
			}
		}

		float diff = (float)fabs( FindPrintableIndex( c ) - FindPrintableIndex( prevc ) );

		if ( diff > maxdiff )
		{
			maxdiff = diff;
		}
	}

	float maxdelta = maxdiff;

	if ( m_nRotaryMaxDelta != 0 )
	{
		maxdelta = min( (float)m_nRotaryMaxDelta, maxdelta );
	}

	return maxdelta;
}

int CHudNumeric::ComputePixelsRequired( vgui::HFont& font, const char *text, int textlen )
{
	int pixels = 0;
	for ( int ch = 0; ch < textlen; ch++ )
	{
		char c = text[ ch ];
		pixels += surface()->GetCharacterWidth( font, c );
	}
	return pixels;
}

void CHudNumeric::DrawCharacterBackground( const char *text, int textlen, HFont& font, int x, int y )
{
	int abcA, abcB, abcC;
	int fontTall = surface()->GetFontTall( font );

	int ch;
	int curx = x - ComputePixelsRequired( font, text, textlen );
	for ( ch = 0; ch < textlen; ch++ )
	{
		char c = text[ ch ];

		surface()->GetCharABCwide( font, c, abcA, abcB, abcC );

		curx += abcA;

		surface()->DrawSetColor( m_CharBg );
		surface()->DrawFilledRect( curx - abcA, y + 2, curx + abcB + abcC, y + fontTall - 2 );

		if ( m_bDrawCharacterBackgroundBorder )
		{
			surface()->DrawSetColor( m_CharBgBorder );
			surface()->DrawOutlinedRect( curx - abcA, y + 2, curx + abcB + abcC, y + fontTall - 2  );
		}

		curx += ( abcB + abcC );
	}
}

void CHudNumeric::DrawCharacterForeground( const char *text, int textlen, HFont& font, int x, int y )
{
	if ( m_nRotaryEffect == ROTARY_EFFECT_NONE ||
		m_nRotaryEffect == ROTARY_EFFECT_SPEEDOMETER )	
		return;

	int abcA, abcB, abcC;
	int fontTall = surface()->GetFontTall( font );

	int ch;
	int curx = x - ComputePixelsRequired( font, text, textlen );
	for ( ch = 0; ch < textlen; ch++ )
	{
		char c = text[ ch ];

		surface()->GetCharABCwide( font, c, abcA, abcB, abcC );

		curx += abcA;

		switch ( m_nRotaryEffect )
		{
		default:
		case ROTARY_EFFECT_VERTICAL_ALARM:
			{
				surface()->DrawSetColor( m_CharFg );
				surface()->DrawLine( curx - abcA + 1, y + fontTall / 2, curx + abcB + abcC - 1, y + fontTall / 2 );
			}
			break;
		case ROTARY_EFFECT_HORIZONTAL_ALARM:
			{
				surface()->DrawSetColor( m_CharFg );
				int avex = curx + ( - abcA + abcB + abcC ) / 2;
				surface()->DrawLine( avex, y + 2, avex, y + fontTall - 2 );
			}
			break;
		}

		curx += ( abcB + abcC );
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *text - 
//			textlen - 
//			font - 
//			x - 
//			y - 
//-----------------------------------------------------------------------------
void CHudNumeric::PaintStringRotary( float t, const char *text, int textlen, HFont& font, int x, int y )
{
	surface()->DrawSetTextFont( font );
	int ch;

	int prevlen = Q_strlen( m_szLatchedValue );

	// Compute pixels actually required
	int pixels = 0;

	for ( ch = 0; ch < textlen; ch++ )
	{
		int charfromend = textlen - ch;
		char c = text[ ch ];
		char prevc = m_szLatchedValue[ max( 0, prevlen - charfromend ) ];
		if ( prevc == 0 )
		{
			int tempindex = FindPrintableIndex( c );
			if ( tempindex != m_Printables.InvalidIndex() )
			{
				tempindex = max( 0, tempindex - 3 );
				prevc = m_Printables[ tempindex ];
			}
			else
			{
				prevc = c;
			}
		}

		float diff = (float)fabs( FindPrintableIndex( c ) - FindPrintableIndex( prevc ) );

		if ( m_nRotaryMaxDelta != 0 )
		{
			diff = min( (float)m_nRotaryMaxDelta, diff );
		}

		float dt = diff / m_flActualCharactersPerSecond;

		float frac = 1.0f;
		if ( dt > 0.0f )
		{
			frac = t / min( dt, m_flRotaryTime );
		}
		frac = clamp( frac, 0.0f, 1.0f );

		float s;
		char chstart, chend;
		GetRotatedChar( frac, prevc, c, chstart, chend, s );

		int w0 = surface()->GetCharacterWidth( font, chstart );
		int w1 = surface()->GetCharacterWidth( font, chend );

		pixels += max( w0, w1 );
	}

	surface()->DrawSetTextPos( x - pixels, y );

	// Now render
	for ( ch = 0; ch < textlen; ch++ )
	{
		int charfromend = textlen - ch;
		char c = text[ ch ];
		char prevc = m_szLatchedValue[ max( 0, prevlen - charfromend ) ];
		if ( prevc == 0 )
		{
			int tempindex = FindPrintableIndex( c );
			if ( tempindex != m_Printables.InvalidIndex() )
			{
				tempindex = max( 0, tempindex - 3 );
				prevc = m_Printables[ tempindex ];
			}
			else
			{
				prevc = c;
			}
		}

		float diff = (float)fabs( FindPrintableIndex( c ) - FindPrintableIndex( prevc ) );

		if ( m_nRotaryMaxDelta != 0 )
		{
			diff = min( (float)m_nRotaryMaxDelta, diff );
		}

		float dt = diff / m_flActualCharactersPerSecond;

		float frac = 1.0f;
		if ( dt > 0.0f )
		{
			frac = t / min( dt, m_flRotaryTime );
		}
		frac = clamp( frac, 0.0f, 1.0f );

		float s;
		char chstart, chend;
		GetRotatedChar( frac, prevc, c, chstart, chend, s );
		int outx, outy;
		surface()->DrawGetTextPos( outx, outy );
		switch ( m_nRotaryEffect )
		{
		default:
		case ROTARY_EFFECT_VERTICAL_ALARM:
			{
				PaintRotatedCharacter( outx, outy, font, chstart, chend, s );
			}
			break;
		case ROTARY_EFFECT_HORIZONTAL_ALARM:
			{
				PaintRotatedCharacterHoriz( outx, outy, font, chstart, chend, s );
			}
			break;
		case ROTARY_EFFECT_SPEEDOMETER:
			{
				PaintRotatedCharacterSpeedomter( outx, outy, font, chstart, chend, s );
			}
			break;
		}

	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *text - 
//			textlen - 
//			font - 
//			x - 
//			y - 
//-----------------------------------------------------------------------------
void CHudNumeric::PaintString( const char *text, int textlen, HFont& font, int x, int y )
{
	if ( m_nRotaryEffect != ROTARY_EFFECT_NONE && 
		IsRotating() && 
		m_flRotaryTime > 0.0f )
	{
		float rotation_time = gpGlobals->curtime - m_flRotaryStartTime;

		PaintStringRotary( rotation_time, text, textlen, font, x, y );
		
		return;
	}
	PaintStringNormal( text, textlen, font, x, y );
}

void CHudNumeric::PaintStringNormal( const char *text, int textlen, vgui::HFont& font, int x, int y )
{
	surface()->DrawSetTextFont( font );
	int ch;
	surface()->DrawSetTextPos( x - ComputePixelsRequired( font, text, textlen ), y );

	for ( ch = 0; ch < textlen; ch++ )
	{
		char c = text[ ch ];
		surface()->DrawUnicodeChar( c );
	}
}

void CHudNumeric::PaintBackground( void )
{
	char value[ MAX_VALUE_LENGTH ];

	if ( !GetValue( value, sizeof( value ) ) )
		return;

	float alpha = m_flAlphaOverride / 255.0f;

	Color boxColor = GetBoxColor();
	boxColor[3] *= alpha;

	SetBgColor( boxColor );

	BaseClass::PaintBackground();

	if ( !m_bUseIcon )
		return;

	CHudTexture *tex = m_hIcon;
	if ( !tex )
		return;

	Color iconColor = m_IconColor;
	iconColor[3] *= alpha;

	tex->DrawSelf( m_flIconXPos, m_flIconYPos, m_flIconWidth, m_flIconHeight, iconColor );
}

void CHudNumeric::PaintValue( const char *value, int textlen, int wide, int tall, Color& clr )
{
	float alpha = m_flAlphaOverride / 255.0f;

	Color boxColor = GetBoxColor();
	boxColor[3] *= alpha;

	SetBgColor( boxColor );

	Color useColor = clr;
	useColor[3] *= alpha;

	surface()->DrawSetTextColor( useColor );

	int x = wide - label_xpos_right;
	int y = label_ypos;

	if ( m_bDrawLabel ) 
	{
		// Label
		PaintStringNormal( GetLabelText(), Q_strlen( GetLabelText() ), m_hLabelFont, x, y );
	}

	x = wide - value_xpos_right;
	y = value_ypos;

	if ( m_nRotaryEffect != ROTARY_EFFECT_NONE && 
		(bool)m_bDrawCharacterBackground )
	{
		DrawCharacterBackground( value, textlen, m_hTextFont, x, y );
	}

	PaintString( value, textlen, m_hTextFont, x, y );

	if ( m_nRotaryEffect != ROTARY_EFFECT_NONE && 
		(bool)m_bDrawCharacterForeground )
	{
		DrawCharacterForeground( value, textlen, m_hTextFont, x, y );
	}

	// draw the overbright blur
	for (float fl = m_flBlur; fl > 0.0f; fl -= 1.0f)
	{
		if (fl >= 1.0f)
		{
			PaintString( value, textlen, m_hTextFontPulsing, x, y );
		}
		else
		{
			// draw a percentage of the last one
			Color col = useColor;
			col[3] *= fl;
			surface()->DrawSetTextColor(col);
			PaintString( value, textlen, m_hTextFontPulsing, x, y );
		}
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Output : vgui::Color
//-----------------------------------------------------------------------------
Color CHudNumeric::GetColor()
{
	return m_TextColor;
}

//-----------------------------------------------------------------------------
// Purpose: 
// Output : vgui::Color
//-----------------------------------------------------------------------------
Color CHudNumeric::GetBoxColor()
{
	return m_BoxColor;
}

//-----------------------------------------------------------------------------
// Purpose: Redraw
//-----------------------------------------------------------------------------
void CHudNumeric::Paint( void )
{
	char value[ MAX_VALUE_LENGTH ];

	if ( !GetValue( value, sizeof( value ) ) )
		return;

	int w, h;
	GetSize( w, h );

	bool dopulse = ( Q_strcmp( value, m_szPreviousValue ) != 0 ) || ( m_bPulseForced );
	bool increment = false;
	if ( dopulse )
	{
		if ( atof( m_szPreviousValue ) <= atof( value ) )
		{
			increment = true;
		}

		Q_strncpy( m_szLatchedValue, m_szPreviousValue, sizeof( m_szLatchedValue ) );
		m_nTextLen = Q_strlen( value );
		
		m_flRotaryStartTime = gpGlobals->curtime;
		float maxdiff = MaxCharacterDiff( m_szLatchedValue, value );
		float timerequired = maxdiff / m_flDesiredCharactersPerSecond;
		m_flActualCharactersPerSecond = (float)m_flDesiredCharactersPerSecond;
		m_flRotaryTime = min( m_flRotaryTimeMax, timerequired );
		if ( m_flRotaryTime < timerequired )
		{
			// Speed up rotation since we're moving so far
			m_flActualCharactersPerSecond =  ( timerequired / m_flRotaryTime ) * m_flDesiredCharactersPerSecond;
		}
	}

	Q_strncpy( m_szPreviousValue, value, sizeof( m_szPreviousValue ) );

	Color clr = GetColor();
	PaintValue( value, m_nTextLen, w, h, clr );

	if ( dopulse && m_bSendPulses )
	{
		// Start with a short pulse
		g_pClientMode->GetViewportAnimationController()->StartAnimationSequence( GetPulseEvent( increment ) );

		m_bPulseForced = false;
	}
}

//-----------------------------------------------------------------------------
// Purpose: Derived class has forced a pulse
//-----------------------------------------------------------------------------
void CHudNumeric::ForcePulse( void )
{
	m_bPulseForced = true;
}