/// <summary>
/// Erzeugt eine neue Instanz zum Zeichnen einer Videotext Zeile.
/// </summary>
/// <param name="page"></param>
internal LineDrawingContext(PageDrawingContext page)
{
// Remember
PageContext = page;
// Create helper
m_CurrentContext = new CharDrawingContext(this);
}
/// <summary>
/// Erzeugt eine Kopie dieser Arbeitsumgebung.
/// </summary>
/// <returns>Eine exakte Kopie der Arbeitsumgebung.</returns>
public CharDrawingContext Clone()
{
// Create clone
CharDrawingContext clone = new CharDrawingContext(Line);
// Copy all data
clone.Foreground = Foreground;
clone.Background = Background;
// Report
return(clone);
}
/// <summary>
/// Erzeugt eine Kopie dieser Arbeitsumgebung.
/// </summary>
/// <returns>Eine exakte Kopie der Arbeitsumgebung.</returns>
public CharDrawingContext Clone()
{
// Create clone
CharDrawingContext clone = new CharDrawingContext(Line);
// Copy all data
clone.Foreground = Foreground;
clone.Background = Background;
// Report
return clone;
}
/// <summary>
/// Stellt ein Zeichen aus dem Mosaik Zeichensatz dar.
/// </summary>
/// <param name="code">Code des Zeichens.</param>
/// <param name="x">Horizontale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="y">Vertikale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void DrawG1(byte code, float x, float y, CharDrawingContext context)
{
// See if this is a mosaic character
if ((code < '\x40') || (code > '\x5f'))
{
// Read mosaic bounds
SizeF mosaic = PageContext.MosaicElementSize;
// Test all bits
if (0 != (0x01 & code))
{
FillRectangle(context.Foreground, x, y, mosaic.Width, mosaic.Height);
}
if (0 != (0x02 & code))
{
FillRectangle(context.Foreground, x + mosaic.Width, y, mosaic.Width, mosaic.Height);
}
if (0 != (0x04 & code))
{
FillRectangle(context.Foreground, x, y + mosaic.Height, mosaic.Width, mosaic.Height);
}
if (0 != (0x08 & code))
{
FillRectangle(context.Foreground, x + mosaic.Width, y + mosaic.Height, mosaic.Width, mosaic.Height);
}
if (0 != (0x10 & code))
{
FillRectangle(context.Foreground, x, y + 2 * mosaic.Height, mosaic.Width, mosaic.Height);
}
if (0 != (0x40 & code))
{
FillRectangle(context.Foreground, x + mosaic.Width, y + 2 * mosaic.Height, mosaic.Width, mosaic.Height);
}
// May want to remember as hold character
m_HoldContext = m_CurrentContext.Clone();
m_HoldCode = code;
}
else
{
// Normal character
DrawG0(code, x, y, context);
}
}
/// <summary>
/// Stellt ein Zeichen aus dem primären Zeichensatz dar.
/// </summary>
/// <param name="code">Code des Zeichens.</param>
/// <param name="x">Horizontale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="y">Vertikale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void DrawG0(byte code, float x, float y, CharDrawingContext context)
{
// Get the character to draw
string ch = m_Charset[code];
// Draw the one
Graphics.DrawString(ch, NormalTextFont, context.Foreground, x, y);
// Get the rectangle
RectangleF rect =
new RectangleF
(
x * Graphics.Transform.Elements[0],
y * Graphics.Transform.Elements[3],
CharSize.Width * Graphics.Transform.Elements[0] * (string.IsNullOrEmpty(ch) ? 1 : ch.Length),
CharSize.Height * Graphics.Transform.Elements[3]
);
// Report
if ((ch != null) && !string.IsNullOrEmpty(ch.Trim(' ')))
{
PageContext.ReportUsage(rect);
}
// See if this is a number
if (ch != null)
{
if (ch.Length == 1)
{
// Load
char dig = ch[0];
// Test
if ((dig >= '0') && (dig <= '9'))
{
PageContext.Digits.Add(dig - '0', rect);
}
}
}
}
/// <summary>
/// Stellt ein Zeichen dar und verändert die horizontale Position entsprechend.
/// </summary>
/// <param name="code">Der Code des Zeichens.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void Draw(byte code, CharDrawingContext context)
{
// Remember
bool pendingBlank = m_PendingBlank;
// Reset
m_PendingBlank = false;
// Check mode
if (Graphics.Transform.Elements[0] == 2)
{
if (code == 32)
{
if (!pendingBlank)
{
// Wait for pending blank
m_PendingBlank = true;
// Silent skip
return;
}
}
}
// There is nothing to draw
if (m_InsideSubtitleBox || !PageContext.IsTransparent)
{
// Attach to unscaled positions
float realX = m_X / Graphics.Transform.Elements[0];
float realY = m_Y / Graphics.Transform.Elements[3];
// Set the background
if (null != context.Background)
{
if (m_HasDoubleHeight && (Graphics.Transform.Elements[3] != 2))
{
// Erase line below
FillRectangle(context.Background, realX, realY, CharSize.Width, CharSize.Height * 2);
}
else
{
// Draw as is
FillRectangle(context.Background, realX, realY, CharSize.Width, CharSize.Height);
}
}
// Check mode and dispatch
if (m_UseG0)
{
// Normal character
DrawG0(code, realX, realY, context);
}
else
{
// Eventually a mosaic character
DrawG1(code, realX, realY, context);
}
}
// Advance position
m_X += Graphics.Transform.Elements[0] * CharSize.Width;
}
/// <summary>
/// Stellt ein Zeichen aus dem Mosaik Zeichensatz dar.
/// </summary>
/// <param name="code">Code des Zeichens.</param>
/// <param name="x">Horizontale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="y">Vertikale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void DrawG1( byte code, float x, float y, CharDrawingContext context )
{
// See if this is a mosaic character
if ((code < '\x40') || (code > '\x5f'))
{
// Read mosaic bounds
SizeF mosaic = PageContext.MosaicElementSize;
// Test all bits
if (0 != (0x01 & code)) FillRectangle( context.Foreground, x, y, mosaic.Width, mosaic.Height );
if (0 != (0x02 & code)) FillRectangle( context.Foreground, x + mosaic.Width, y, mosaic.Width, mosaic.Height );
if (0 != (0x04 & code)) FillRectangle( context.Foreground, x, y + mosaic.Height, mosaic.Width, mosaic.Height );
if (0 != (0x08 & code)) FillRectangle( context.Foreground, x + mosaic.Width, y + mosaic.Height, mosaic.Width, mosaic.Height );
if (0 != (0x10 & code)) FillRectangle( context.Foreground, x, y + 2 * mosaic.Height, mosaic.Width, mosaic.Height );
if (0 != (0x40 & code)) FillRectangle( context.Foreground, x + mosaic.Width, y + 2 * mosaic.Height, mosaic.Width, mosaic.Height );
// May want to remember as hold character
m_HoldContext = m_CurrentContext.Clone();
m_HoldCode = code;
}
else
{
// Normal character
DrawG0( code, x, y, context );
}
}
/// <summary>
/// Stellt ein Zeichen aus dem primären Zeichensatz dar.
/// </summary>
/// <param name="code">Code des Zeichens.</param>
/// <param name="x">Horizontale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="y">Vertikale Position in der Seite, an der das Zeichen erscheinen soll.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void DrawG0( byte code, float x, float y, CharDrawingContext context )
{
// Get the character to draw
string ch = m_Charset[code];
// Draw the one
Graphics.DrawString( ch, NormalTextFont, context.Foreground, x, y );
// Get the rectangle
RectangleF rect =
new RectangleF
(
x * Graphics.Transform.Elements[0],
y * Graphics.Transform.Elements[3],
CharSize.Width * Graphics.Transform.Elements[0] * (string.IsNullOrEmpty( ch ) ? 1 : ch.Length),
CharSize.Height * Graphics.Transform.Elements[3]
);
// Report
if ((ch != null) && !string.IsNullOrEmpty( ch.Trim( ' ' ) ))
PageContext.ReportUsage( rect );
// See if this is a number
if (ch != null)
if (ch.Length == 1)
{
// Load
char dig = ch[0];
// Test
if ((dig >= '0') && (dig <= '9'))
PageContext.Digits.Add( dig - '0', rect );
}
}
/// <summary>
/// Stellt ein Zeichen dar und verändert die horizontale Position entsprechend.
/// </summary>
/// <param name="code">Der Code des Zeichens.</param>
/// <param name="context">Informationen über das Darstellungsformat.</param>
private void Draw( byte code, CharDrawingContext context )
{
// Remember
bool pendingBlank = m_PendingBlank;
// Reset
m_PendingBlank = false;
// Check mode
if (Graphics.Transform.Elements[0] == 2)
if (code == 32)
if (!pendingBlank)
{
// Wait for pending blank
m_PendingBlank = true;
// Silent skip
return;
}
// There is nothing to draw
if (m_InsideSubtitleBox || !PageContext.IsTransparent)
{
// Attach to unscaled positions
float realX = m_X / Graphics.Transform.Elements[0];
float realY = m_Y / Graphics.Transform.Elements[3];
// Set the background
if (null != context.Background)
if (m_HasDoubleHeight && (Graphics.Transform.Elements[3] != 2))
{
// Erase line below
FillRectangle( context.Background, realX, realY, CharSize.Width, CharSize.Height * 2 );
}
else
{
// Draw as is
FillRectangle( context.Background, realX, realY, CharSize.Width, CharSize.Height );
}
// Check mode and dispatch
if (m_UseG0)
{
// Normal character
DrawG0( code, realX, realY, context );
}
else
{
// Eventually a mosaic character
DrawG1( code, realX, realY, context );
}
}
// Advance position
m_X += Graphics.Transform.Elements[0] * CharSize.Width;
}
/// <summary>
/// Erzeugt eine neue Instanz zum Zeichnen einer Videotext Zeile.
/// </summary>
/// <param name="page"></param>
internal LineDrawingContext( PageDrawingContext page )
{
// Remember
PageContext = page;
// Create helper
m_CurrentContext = new CharDrawingContext( this );
}
