public static extern int ScriptTextOut(
[In] IntPtr hdc,
[In, Out] ref IntPtr psc,
[In] int x,
[In] int y,
[In] ExtTextOutOptions fuOptions,
[In] RECT *lprc,
[In] SCRIPT_ANALYSIS *psa,
[In] char *pwcReserved,
[In] int iReserved,
[In] ushort *pwGlyphs,
[In] int cGlyphs,
[In] int *piAdvance,
[In] int *piJustify,
[In] GOFFSET *pGoffset);
private static void ScriptTextOut(IntPtr hdc, ref IntPtr scriptCache, int x, int y,
ExtTextOutOptions fuOptions, RECT* clipRect, SCRIPT_ANALYSIS* scriptAnalysis,
ushort* glyphs, int glyphCount, int* glyphAdvanceWidths, int* justifiedGlyphAdvanceWidths,
GOFFSET* glyphOffets)
{
int result = NativeMethods.ScriptTextOut(hdc, ref scriptCache, x, y, fuOptions, clipRect,
scriptAnalysis, null, 0, glyphs, glyphCount, glyphAdvanceWidths, justifiedGlyphAdvanceWidths,
glyphOffets);
if (result != NativeConstants.S_OK)
Marshal.ThrowExceptionForHR(result);
}
public void ExtTextOut(Canvas surface, double x, double y, ExtTextOutOptions options, Rect dimensions, string text, double[] dx)
{
TextBlock block = null;
Grid container = null;
double deviceX = LtoDX(x);
double deviceY = LtoDY(y);
double textWidth;
double textHeight;
Geometry clipGeometry = null;
if (dx == null)
{
// No character placement
block = new TextBlock
{
Inlines = {
new Run
{
Text = text
}
}
};
ApplyTextStyle(block, deviceY, true, options);
//Canvas.SetLeft(block, deviceX);
surface.Children.Add(block);
block.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
textHeight = block.DesiredSize.Height;
textWidth = block.DesiredSize.Width;
}
else
{
// Place individual characters
int stringLength = text.Length;
double currentPos = 0; // LtoDX(x);
container = new Grid();
for (int i = 0; i < stringLength; i++)
{
block = new TextBlock
{
Inlines = {
new Run
{
Text = text.Substring(i, 1)
}
}
};
//TextOptions.SetTextFormattingMode(block, TextFormattingMode.Display);
ApplyTextStyle(block, deviceY, false, null);
if (i > 0)
{
currentPos += ScaleWidth(dx[i - 1]);
}
block.Margin = new Thickness(currentPos, 0, 0, 0);
// TODO: Character width
//block.Width = dx[i];
container.Children.Add(block);
}
//Canvas.SetLeft(container, deviceX);
ApplyTextContainerStyle(container, deviceY);
surface.Children.Add(container);
container.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
textHeight = container.DesiredSize.Height;
textWidth = container.DesiredSize.Width;
}
// Horizontal alignment
if ((_currentState.TextAlign & (ushort)TextAlignmentMode.TA_CENTER) == (ushort)TextAlignmentMode.TA_CENTER)
{
deviceX -= textWidth / 2.0;
}
else if ((_currentState.TextAlign & (ushort)TextAlignmentMode.TA_RIGHT) == (ushort)TextAlignmentMode.TA_RIGHT)
{
deviceX -= textWidth;
}
// Vertical Alignment
if ((_currentState.TextAlign & (ushort)TextAlignmentMode.TA_BASELINE) == (ushort)TextAlignmentMode.TA_BASELINE)
{
double baseline;
#if NETFX_CORE
baseline = textHeight;
#else
if (block != null)
{
var formattedText = new FormattedText(
text,
System.Globalization.CultureInfo.CurrentCulture,
block.FlowDirection,
new Typeface(block.FontFamily, block.FontStyle, block.FontWeight, block.FontStretch, block.FontFamily),
block.FontSize,
block.Foreground);
baseline = formattedText.Baseline;
}
else
{
baseline = textHeight;
}
#endif
deviceY -= baseline;
}
else if ((_currentState.TextAlign & (ushort)TextAlignmentMode.TA_BOTTOM) == (ushort)TextAlignmentMode.TA_BOTTOM)
{
deviceY -= textHeight;
}
// Clip
clipGeometry = GetClipGeometryAsChild(
new Rect(
deviceX,
deviceY,
textWidth,
textHeight)
);
if (container == null)
{
Canvas.SetLeft(block, deviceX);
Canvas.SetTop(block, deviceY);
#if !NETFX_CORE
if (clipGeometry != null)
{
block.Clip = clipGeometry;
}
#endif
}
else
{
Canvas.SetLeft(container, deviceX);
Canvas.SetTop(container, deviceY);
#if !NETFX_CORE
if (clipGeometry != null)
{
container.Clip = clipGeometry;
}
#endif
}
if ((options & ExtTextOutOptions.ETO_OPAQUE) == ExtTextOutOptions.ETO_OPAQUE)
{
block.Height = ScaleHeight(dimensions.Height);
block.Width = ScaleWidth(dimensions.Width);
}
//if ((currentState.TextAlign & (ushort)TextAlignmentMode.TA_UPDATECP) == (ushort)TextAlignmentMode.TA_UPDATECP)
//{
// // Update current pos
// Point pos = currentState.CurrentPosition;
// // TODO: Mapx and y
// pos.X = Canvas.GetLeft(block) + block.ActualWidth;
// pos.Y = Canvas.GetTop(block) + block.ActualHeight;
// currentState.CurrentPosition = pos;
//}
}
private void ApplyTextStyle(TextBlock block, double y, bool applyTransforms, ExtTextOutOptions? options)
{
block.Foreground = new SolidColorBrush(_currentState.TextColor);
if (_currentState.BackgroundMode == MixMode.OPAQUE ||
(options.HasValue && (options.Value & ExtTextOutOptions.ETO_OPAQUE) == ExtTextOutOptions.ETO_OPAQUE))
{
#if !NETFX_CORE
block.Background = new SolidColorBrush(_currentState.BackgroundColour);
#endif
}
var font = _currentState.CurrentFont;
if (font != null)
{
block.FontFamily = new FontFamily(font.FaceName);
block.FontSize = 12; // TODO
//block.FontStretch = FontStretches.UltraExpanded; // TODO
if (font.Height != 0)
{
block.FontSize = Math.Abs(ScaleHeight(font.Height));
}
if (font.IsItalic)
{
#if NETFX_CORE
block.FontStyle = FontStyle.Italic;
#else
block.FontStyle = FontStyles.Italic;
#endif
}
#if !NETFX_CORE
if (font.IsStrikeout)
{
block.TextDecorations.Add(TextDecorations.Strikethrough);
}
if (font.IsUnderline)
{
block.TextDecorations.Add(TextDecorations.Underline);
}
#endif
if (font.Weight > 0)
{
#if NETFX_CORE
block.FontWeight = new FontWeight() { Weight = (ushort)font.Weight };
#else
block.FontWeight = FontWeight.FromOpenTypeWeight(font.Weight);
#endif
}
if (applyTransforms)
{
Canvas.SetTop(block, y - block.FontSize);
// Rotation
if (font.Escapement != 0)
{
var rotate = new RotateTransform
{
Angle = -1 * font.Escapement / 10.0
#if !NETFX_CORE
, CenterY = block.FontSize * block.FontFamily.Baseline
#endif
};
block.RenderTransform = rotate;
}
}
}
}
