Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / MS / Internal / TextFormatting / FormattedTextSymbols.cs / 1 / FormattedTextSymbols.cs
//----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
//
// Description:
// Formatting a single style, single reading direction text symbols
//
// History:
// 08/16/2004 : wchao - Created it
//
//---------------------------------------------------------------------------
using System;
using System.Security;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using MS.Internal;
using MS.Internal.Shaping;
namespace MS.Internal.TextFormatting
{
///
/// Formatted form of TextSymbols
///
internal sealed class FormattedTextSymbols
{
private Glyphs[] _glyphs;
private bool _rightToLeft;
///
/// Construct a formatted run
///
///
/// Critical - this method has unsafe blocks
/// Safe - it doesn't expose any critical data
///
[SecurityCritical, SecurityTreatAsSafe]
public FormattedTextSymbols(
GlyphingCache glyphingCache,
TextRun textSymbols,
bool rightToLeft,
double scalingFactor
)
{
ITextSymbols symbols = textSymbols as ITextSymbols;
Debug.Assert(symbols != null);
// break down a single text run into pieces
IList shapeables = symbols.GetTextShapeableSymbols(
glyphingCache,
textSymbols.CharacterBufferReference,
textSymbols.Length,
rightToLeft,
null, // cultureInfo
null // textModifierScope
);
Debug.Assert(shapeables != null && shapeables.Count > 0);
_rightToLeft = rightToLeft;
_glyphs = new Glyphs[shapeables.Count];
CharacterBuffer charBuffer = textSymbols.CharacterBufferReference.CharacterBuffer;
int offsetToFirstChar = textSymbols.CharacterBufferReference.OffsetToFirstChar;
int i = 0;
int ich = 0;
while (i < shapeables.Count)
{
TextShapeableSymbols current = shapeables[i] as TextShapeableSymbols;
Debug.Assert(current != null);
int cch = current.Length;
int j;
// make a separate character buffer for glyphrun persistence
char[] charArray = new char[cch];
for (j = 0; j < cch; j++)
charArray[j] = charBuffer[offsetToFirstChar + ich + j];
if (current.IsShapingRequired)
{
ushort[] clusterMap = new ushort[cch];
CharacterShapingProperties[] charProp = new CharacterShapingProperties[cch];
int glyphCount;
ushort[] glyphIndices;
GlyphShapingProperties[] glyphProp;
int[] glyphAdvances;
GlyphOffset[] glyphOffsets;
// Note that we dont check for the chance of having multiple
// shapeables shaped together here since we're dealing with
// single-style text. There is virtually no chance to require
// for adjacent runs to shape together. We rely on TextSymbols
// to reduce duplication of the itemized shapeables for performance.
unsafe
{
fixed (char* fixedCharArray = &charArray[0])
fixed (ushort* fixedClusterMap = &clusterMap[0])
fixed (CharacterShapingProperties* fixedCharProp = &charProp[0])
{
glyphIndices = current.GetGlyphs(
new CheckedCharPointer(fixedCharArray, cch),
cch,
ShapingOptions.None,
null, // featureSet
new CheckedUShortPointer(fixedClusterMap, cch),
new CheckedCharacterShapingPropertiesPointer(fixedCharProp,cch),
out glyphProp,
out glyphCount
);
// Shaping is all done in ideal units.
// Create int[] and GlyphOffset[] for shaping
glyphAdvances = new int[glyphCount];
glyphOffsets = new GlyphOffset[glyphCount];
fixed (ushort* fixedGlyphIndices = &glyphIndices[0])
fixed (GlyphShapingProperties* fixedGlyphProp = &glyphProp[0])
fixed (int* fixedGlyphAdvances = &glyphAdvances[0])
fixed (GlyphOffset * fixedGlyphOffsets = &glyphOffsets[0])
{
current.GetGlyphPlacements(
new CheckedUShortPointer(fixedGlyphIndices, glyphCount),
new CheckedGlyphShapingPropertiesPointer(fixedGlyphProp, glyphCount),
glyphCount,
new CheckedUShortPointer(fixedClusterMap, cch),
new CheckedCharacterShapingPropertiesPointer(fixedCharProp, cch),
cch,
ShapingOptions.None,
null, // featureSet
scalingFactor, // format resolution specified per em
new CheckedIntPointer(fixedGlyphAdvances, glyphCount),
new CheckedGlyphOffsetPointer(fixedGlyphOffsets, glyphCount)
);
}
}
_glyphs[i] = new Glyphs(
current,
charArray,
glyphAdvances,
clusterMap,
glyphIndices,
glyphProp,
glyphOffsets,
scalingFactor
);
}
}
else
{
// shaping not required,
// bypass glyphing process altogether
int[] nominalAdvances = new int[charArray.Length];
unsafe
{
fixed(char* fixedCharArray = &charArray[0])
fixed(int * fixedNominalAdvances = &nominalAdvances[0])
{
current.GetAdvanceWidthsUnshaped(
fixedCharArray,
cch,
scalingFactor, // format resolution specified per em,
fixedNominalAdvances
);
}
}
_glyphs[i] = new Glyphs(
current,
charArray,
nominalAdvances,
scalingFactor
);
}
i++;
ich += cch;
}
}
///
/// Total formatted width
///
public double Width
{
get
{
Debug.Assert(_glyphs != null);
double width = 0;
foreach (Glyphs glyphs in _glyphs)
{
width += glyphs.Width;
}
return width;
}
}
///
/// Draw all formatted glyphruns
///
/// drawing bounding box
public Rect Draw(
DrawingContext drawingContext,
Point currentOrigin
)
{
Rect inkBoundingBox = Rect.Empty;
Debug.Assert(_glyphs != null);
foreach (Glyphs glyphs in _glyphs)
{
GlyphRun glyphRun = glyphs.CreateGlyphRun(currentOrigin, _rightToLeft);
Rect boundingBox;
if (glyphRun != null)
{
boundingBox = glyphRun.ComputeInkBoundingBox();
if (drawingContext != null)
{
// Emit glyph run background.
glyphRun.EmitBackground(drawingContext, glyphs.BackgroundBrush);
drawingContext.PushGuidelineY1(currentOrigin.Y);
try
{
drawingContext.DrawGlyphRun(glyphs.ForegroundBrush, glyphRun);
}
finally
{
drawingContext.Pop();
}
}
}
else
{
boundingBox = Rect.Empty;
}
if (!boundingBox.IsEmpty)
{
// glyph run's ink bounding box is relative to its origin
boundingBox.X += glyphRun.BaselineOrigin.X;
boundingBox.Y += glyphRun.BaselineOrigin.Y;
}
// accumulate overall ink bounding box
inkBoundingBox.Union(boundingBox);
if (_rightToLeft)
{
currentOrigin.X -= glyphs.Width;
}
else
{
currentOrigin.X += glyphs.Width;
}
}
return inkBoundingBox;
}
///
/// All glyph properties used during GlyphRun construction
///
///
/// We should be able to get rid off this type and just store GlyphRuns
/// once GlyphRun gets refactor'd so that it contains no drawing time
/// positioning data inside.
///
private sealed class Glyphs
{
private TextShapeableSymbols _shapeable;
private char[] _charArray;
private ushort[] _clusterMap;
private ushort[] _glyphIndices;
private GlyphShapingProperties[] _glyphProp;
private double[] _glyphAdvances;
private IList _glyphOffsets;
private double _width;
///
/// Construct a nominal description of glyph data
///
internal Glyphs(
TextShapeableSymbols shapeable,
char[] charArray,
int[] nominalAdvances,
double scalingFactor
) :
this(
shapeable,
charArray,
nominalAdvances,
null, // clusterMap
null, // glyphIndices
null, // glyphProp
null, // glyphOffsets
scalingFactor
)
{}
///
/// Construct a full description of glyph data
///
internal Glyphs(
TextShapeableSymbols shapeable,
char[] charArray,
int[] glyphAdvances,
ushort[] clusterMap,
ushort[] glyphIndices,
GlyphShapingProperties[] glyphProp,
GlyphOffset[] glyphOffsets,
double scalingFactor
)
{
_shapeable = shapeable;
_charArray = charArray;
// create double array for glyph run creation, because Shaping is all done in
// ideal units. FormattedTextSymbol is used to draw text collapsing symbols
// which usually contains very few glyphs. Using double[] and Point[] directly
// is more efficient.
_glyphAdvances = new double[glyphAdvances.Length];
double ToReal = 1.0 / scalingFactor;
for (int i = 0; i < glyphAdvances.Length; i++)
{
_glyphAdvances[i] = glyphAdvances[i] * ToReal;
_width += _glyphAdvances[i];
}
if (glyphIndices != null)
{
_clusterMap = clusterMap;
if (glyphOffsets != null)
{
_glyphOffsets = new PartialArray(new Point[glyphOffsets.Length]);
for (int i = 0; i < glyphOffsets.Length; i++)
{
_glyphOffsets[i] = new Point(
glyphOffsets[i].du * ToReal,
glyphOffsets[i].dv * ToReal
);
}
}
Debug.Assert(glyphAdvances.Length <= glyphIndices.Length);
if (glyphAdvances.Length != glyphIndices.Length)
{
_glyphIndices = new ushort[glyphAdvances.Length];
_glyphProp = new GlyphShapingProperties[glyphAdvances.Length];
for (int i = 0; i < glyphAdvances.Length; i++)
{
_glyphIndices[i] = glyphIndices[i];
_glyphProp[i] = glyphProp[i];
}
}
else
{
_glyphIndices = glyphIndices;
_glyphProp = glyphProp;
}
}
}
///
/// Total formatted width
///
public double Width
{
get { return _width; }
}
///
/// Construct a GlyphRun object given the specified drawing origin
///
internal GlyphRun CreateGlyphRun(
Point currentOrigin,
bool rightToLeft
)
{
if (!_shapeable.IsShapingRequired)
{
return _shapeable.ComputeUnshapedGlyphRun(
currentOrigin,
_charArray,
_glyphAdvances
);
}
return _shapeable.ComputeShapedGlyphRun(
currentOrigin,
_charArray,
_clusterMap,
_glyphIndices,
_glyphProp,
_glyphAdvances,
_glyphOffsets,
rightToLeft,
false // sideways not yet supported
);
}
public Brush ForegroundBrush
{
get { return _shapeable.Properties.ForegroundBrush; }
}
public Brush BackgroundBrush
{
get { return _shapeable.Properties.BackgroundBrush; }
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
//
// Description:
// Formatting a single style, single reading direction text symbols
//
// History:
// 08/16/2004 : wchao - Created it
//
//---------------------------------------------------------------------------
using System;
using System.Security;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using MS.Internal;
using MS.Internal.Shaping;
namespace MS.Internal.TextFormatting
{
///
/// Formatted form of TextSymbols
///
internal sealed class FormattedTextSymbols
{
private Glyphs[] _glyphs;
private bool _rightToLeft;
///
/// Construct a formatted run
///
///
/// Critical - this method has unsafe blocks
/// Safe - it doesn't expose any critical data
///
[SecurityCritical, SecurityTreatAsSafe]
public FormattedTextSymbols(
GlyphingCache glyphingCache,
TextRun textSymbols,
bool rightToLeft,
double scalingFactor
)
{
ITextSymbols symbols = textSymbols as ITextSymbols;
Debug.Assert(symbols != null);
// break down a single text run into pieces
IList shapeables = symbols.GetTextShapeableSymbols(
glyphingCache,
textSymbols.CharacterBufferReference,
textSymbols.Length,
rightToLeft,
null, // cultureInfo
null // textModifierScope
);
Debug.Assert(shapeables != null && shapeables.Count > 0);
_rightToLeft = rightToLeft;
_glyphs = new Glyphs[shapeables.Count];
CharacterBuffer charBuffer = textSymbols.CharacterBufferReference.CharacterBuffer;
int offsetToFirstChar = textSymbols.CharacterBufferReference.OffsetToFirstChar;
int i = 0;
int ich = 0;
while (i < shapeables.Count)
{
TextShapeableSymbols current = shapeables[i] as TextShapeableSymbols;
Debug.Assert(current != null);
int cch = current.Length;
int j;
// make a separate character buffer for glyphrun persistence
char[] charArray = new char[cch];
for (j = 0; j < cch; j++)
charArray[j] = charBuffer[offsetToFirstChar + ich + j];
if (current.IsShapingRequired)
{
ushort[] clusterMap = new ushort[cch];
CharacterShapingProperties[] charProp = new CharacterShapingProperties[cch];
int glyphCount;
ushort[] glyphIndices;
GlyphShapingProperties[] glyphProp;
int[] glyphAdvances;
GlyphOffset[] glyphOffsets;
// Note that we dont check for the chance of having multiple
// shapeables shaped together here since we're dealing with
// single-style text. There is virtually no chance to require
// for adjacent runs to shape together. We rely on TextSymbols
// to reduce duplication of the itemized shapeables for performance.
unsafe
{
fixed (char* fixedCharArray = &charArray[0])
fixed (ushort* fixedClusterMap = &clusterMap[0])
fixed (CharacterShapingProperties* fixedCharProp = &charProp[0])
{
glyphIndices = current.GetGlyphs(
new CheckedCharPointer(fixedCharArray, cch),
cch,
ShapingOptions.None,
null, // featureSet
new CheckedUShortPointer(fixedClusterMap, cch),
new CheckedCharacterShapingPropertiesPointer(fixedCharProp,cch),
out glyphProp,
out glyphCount
);
// Shaping is all done in ideal units.
// Create int[] and GlyphOffset[] for shaping
glyphAdvances = new int[glyphCount];
glyphOffsets = new GlyphOffset[glyphCount];
fixed (ushort* fixedGlyphIndices = &glyphIndices[0])
fixed (GlyphShapingProperties* fixedGlyphProp = &glyphProp[0])
fixed (int* fixedGlyphAdvances = &glyphAdvances[0])
fixed (GlyphOffset * fixedGlyphOffsets = &glyphOffsets[0])
{
current.GetGlyphPlacements(
new CheckedUShortPointer(fixedGlyphIndices, glyphCount),
new CheckedGlyphShapingPropertiesPointer(fixedGlyphProp, glyphCount),
glyphCount,
new CheckedUShortPointer(fixedClusterMap, cch),
new CheckedCharacterShapingPropertiesPointer(fixedCharProp, cch),
cch,
ShapingOptions.None,
null, // featureSet
scalingFactor, // format resolution specified per em
new CheckedIntPointer(fixedGlyphAdvances, glyphCount),
new CheckedGlyphOffsetPointer(fixedGlyphOffsets, glyphCount)
);
}
}
_glyphs[i] = new Glyphs(
current,
charArray,
glyphAdvances,
clusterMap,
glyphIndices,
glyphProp,
glyphOffsets,
scalingFactor
);
}
}
else
{
// shaping not required,
// bypass glyphing process altogether
int[] nominalAdvances = new int[charArray.Length];
unsafe
{
fixed(char* fixedCharArray = &charArray[0])
fixed(int * fixedNominalAdvances = &nominalAdvances[0])
{
current.GetAdvanceWidthsUnshaped(
fixedCharArray,
cch,
scalingFactor, // format resolution specified per em,
fixedNominalAdvances
);
}
}
_glyphs[i] = new Glyphs(
current,
charArray,
nominalAdvances,
scalingFactor
);
}
i++;
ich += cch;
}
}
///
/// Total formatted width
///
public double Width
{
get
{
Debug.Assert(_glyphs != null);
double width = 0;
foreach (Glyphs glyphs in _glyphs)
{
width += glyphs.Width;
}
return width;
}
}
///
/// Draw all formatted glyphruns
///
/// drawing bounding box
public Rect Draw(
DrawingContext drawingContext,
Point currentOrigin
)
{
Rect inkBoundingBox = Rect.Empty;
Debug.Assert(_glyphs != null);
foreach (Glyphs glyphs in _glyphs)
{
GlyphRun glyphRun = glyphs.CreateGlyphRun(currentOrigin, _rightToLeft);
Rect boundingBox;
if (glyphRun != null)
{
boundingBox = glyphRun.ComputeInkBoundingBox();
if (drawingContext != null)
{
// Emit glyph run background.
glyphRun.EmitBackground(drawingContext, glyphs.BackgroundBrush);
drawingContext.PushGuidelineY1(currentOrigin.Y);
try
{
drawingContext.DrawGlyphRun(glyphs.ForegroundBrush, glyphRun);
}
finally
{
drawingContext.Pop();
}
}
}
else
{
boundingBox = Rect.Empty;
}
if (!boundingBox.IsEmpty)
{
// glyph run's ink bounding box is relative to its origin
boundingBox.X += glyphRun.BaselineOrigin.X;
boundingBox.Y += glyphRun.BaselineOrigin.Y;
}
// accumulate overall ink bounding box
inkBoundingBox.Union(boundingBox);
if (_rightToLeft)
{
currentOrigin.X -= glyphs.Width;
}
else
{
currentOrigin.X += glyphs.Width;
}
}
return inkBoundingBox;
}
///
/// All glyph properties used during GlyphRun construction
///
///
/// We should be able to get rid off this type and just store GlyphRuns
/// once GlyphRun gets refactor'd so that it contains no drawing time
/// positioning data inside.
///
private sealed class Glyphs
{
private TextShapeableSymbols _shapeable;
private char[] _charArray;
private ushort[] _clusterMap;
private ushort[] _glyphIndices;
private GlyphShapingProperties[] _glyphProp;
private double[] _glyphAdvances;
private IList _glyphOffsets;
private double _width;
///
/// Construct a nominal description of glyph data
///
internal Glyphs(
TextShapeableSymbols shapeable,
char[] charArray,
int[] nominalAdvances,
double scalingFactor
) :
this(
shapeable,
charArray,
nominalAdvances,
null, // clusterMap
null, // glyphIndices
null, // glyphProp
null, // glyphOffsets
scalingFactor
)
{}
///
/// Construct a full description of glyph data
///
internal Glyphs(
TextShapeableSymbols shapeable,
char[] charArray,
int[] glyphAdvances,
ushort[] clusterMap,
ushort[] glyphIndices,
GlyphShapingProperties[] glyphProp,
GlyphOffset[] glyphOffsets,
double scalingFactor
)
{
_shapeable = shapeable;
_charArray = charArray;
// create double array for glyph run creation, because Shaping is all done in
// ideal units. FormattedTextSymbol is used to draw text collapsing symbols
// which usually contains very few glyphs. Using double[] and Point[] directly
// is more efficient.
_glyphAdvances = new double[glyphAdvances.Length];
double ToReal = 1.0 / scalingFactor;
for (int i = 0; i < glyphAdvances.Length; i++)
{
_glyphAdvances[i] = glyphAdvances[i] * ToReal;
_width += _glyphAdvances[i];
}
if (glyphIndices != null)
{
_clusterMap = clusterMap;
if (glyphOffsets != null)
{
_glyphOffsets = new PartialArray(new Point[glyphOffsets.Length]);
for (int i = 0; i < glyphOffsets.Length; i++)
{
_glyphOffsets[i] = new Point(
glyphOffsets[i].du * ToReal,
glyphOffsets[i].dv * ToReal
);
}
}
Debug.Assert(glyphAdvances.Length <= glyphIndices.Length);
if (glyphAdvances.Length != glyphIndices.Length)
{
_glyphIndices = new ushort[glyphAdvances.Length];
_glyphProp = new GlyphShapingProperties[glyphAdvances.Length];
for (int i = 0; i < glyphAdvances.Length; i++)
{
_glyphIndices[i] = glyphIndices[i];
_glyphProp[i] = glyphProp[i];
}
}
else
{
_glyphIndices = glyphIndices;
_glyphProp = glyphProp;
}
}
}
///
/// Total formatted width
///
public double Width
{
get { return _width; }
}
///
/// Construct a GlyphRun object given the specified drawing origin
///
internal GlyphRun CreateGlyphRun(
Point currentOrigin,
bool rightToLeft
)
{
if (!_shapeable.IsShapingRequired)
{
return _shapeable.ComputeUnshapedGlyphRun(
currentOrigin,
_charArray,
_glyphAdvances
);
}
return _shapeable.ComputeShapedGlyphRun(
currentOrigin,
_charArray,
_clusterMap,
_glyphIndices,
_glyphProp,
_glyphAdvances,
_glyphOffsets,
rightToLeft,
false // sideways not yet supported
);
}
public Brush ForegroundBrush
{
get { return _shapeable.Properties.ForegroundBrush; }
}
public Brush BackgroundBrush
{
get { return _shapeable.Properties.BackgroundBrush; }
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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