Introdução ao objeto GlyphRun e elemento Glyphs
This topic describes the GlyphRun object and the Glyphs element.
Este tópico contém as seguintes seções.
- Introduction to GlyphRun
- The GlyphRun Object
- The Glyphs Element
- Glyph Metrics
- Glyphs Markup
- Tópicos relacionados
Introduction to GlyphRun
Windows Presentation Foundation (WPF) provides advanced text support including glyph-level markup with direct access to Glyphs for customers who want to intercept and persist text after formatting. These features provide critical support for the different text rendering requirements in each of the following scenarios.
Screen display of fixed-format documents.
Print scenarios.
Extensible Application Markup Language (XAML) as a device printer language.
Microsoft XPS Document Writer.
Previous printer drivers, output from Win32 applications to the fixed format.
Print spool format.
Fixed-format document representation, including clients for previous versions of Windows and other computing devices.
Observação
Glyphse GlyphRun são destinados a apresentação do documento de formato fixo e imprimir cenários.Windows Presentation Foundation (WPF)fornece vários elementos de layout geral e user interface (UI) cenários, como Label e TextBlock.Para obter mais informações sobre o layout e UI cenários, consulte o Tipologia no WPF.
The GlyphRun Object
The GlyphRun object represents a sequence of glyphs from a single face of a single font at a single size, and with a single rendering style.
GlyphRun includes both font details such as glyph Indices and individual glyph positions. It also includes the original Unicode code points the run was generated from, character-to-glyph buffer offset mapping information, and per-character and per-glyph flags.
GlyphRuntem um alto nível correspondente FrameworkElement, Glyphs. Glyphspode ser usado na árvore de elemento e em XAML a marcação para representar GlyphRun de saída.
The Glyphs Element
The Glyphs element represents the output of a GlyphRun in XAML. The following markup syntax is used to describe the Glyphs element.
<!-- The example shows how to use a Glyphs object. -->
<Page
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
>
<StackPanel Background="PowderBlue">
<Glyphs
FontUri = "C:\WINDOWS\Fonts\TIMES.TTF"
FontRenderingEmSize = "100"
StyleSimulations = "BoldSimulation"
UnicodeString = "Hello World!"
Fill = "Black"
OriginX = "100"
OriginY = "200"
/>
</StackPanel>
</Page>
The following property definitions correspond to the first four attributes in the sample markup.
Property |
Description |
|---|---|
Especifica um identificador de recurso: nome do arquivo da Web uniform resource identifier (URI), ou uma referência de recurso no aplicativo. exe ou recipiente. |
|
Specifies the font size in drawing surface units (default is .96 inches). |
|
Specifies flags for bold and Italic styles. |
|
Specifies the bidirectional layout level. Even-numbered and zero values imply left-to-right layout; odd-numbered values imply right-to-left layout. |
Indices property
The Indices property is a string of glyph specifications. Where a sequence of glyphs forms a single cluster, the specification of the first glyph in the cluster is preceded by a specification of how many glyphs and how many code points combine to form the cluster. The Indices property collects in one string the following properties.
Glyph indices
Glyph advance widths
Combining glyph attachment vectors
Cluster mapping from code points to glyphs
Glyph flags
Each glyph specification has the following form.
[GlyphIndex][,[Advance][,[uOffset][,[vOffset][,[Flags]]]]]
Glyph Metrics
Each glyph defines metrics that specify how it aligns with other Glyphs. The following graphic defines the various typographic qualities of two different glyph characters.
.png "Diagrama gráfico de medidas de glifo")
Glyphs Markup
The following code example shows how to use various properties of the Glyphs element in XAML.
<!-- The example shows how to use different property settings of Glyphs objects. -->
<Canvas
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Background="PowderBlue"
>
<Glyphs
FontUri = "C:\WINDOWS\Fonts\ARIAL.TTF"
FontRenderingEmSize = "36"
StyleSimulations = "ItalicSimulation"
UnicodeString = "Hello World!"
Fill = "SteelBlue"
OriginX = "50"
OriginY = "75"
/>
<!-- "Hello World!" with default kerning -->
<Glyphs
FontUri = "C:\WINDOWS\Fonts\ARIAL.TTF"
FontRenderingEmSize = "36"
UnicodeString = "Hello World!"
Fill = "Maroon"
OriginX = "50"
OriginY = "150"
/>
<!-- "Hello World!" with explicit character widths for proportional font -->
<Glyphs
FontUri = "C:\WINDOWS\Fonts\ARIAL.TTF"
FontRenderingEmSize = "36"
UnicodeString = "Hello World!"
Indices = ",80;,80;,80;,80;,80;,80;,80;,80;,80;,80;,80"
Fill = "Maroon"
OriginX = "50"
OriginY = "225"
/>
<!-- "Hello World!" with fixed-width font -->
<Glyphs
FontUri = "C:\WINDOWS\Fonts\COUR.TTF"
FontRenderingEmSize = "36"
StyleSimulations = "BoldSimulation"
UnicodeString = "Hello World!"
Fill = "Maroon"
OriginX = "50"
OriginY = "300"
/>
<!-- "Open file" without "fi" ligature -->
<Glyphs
FontUri = "C:\WINDOWS\Fonts\TIMES.TTF"
FontRenderingEmSize = "36"
StyleSimulations = "BoldSimulation"
UnicodeString = "Open file"
Fill = "SlateGray"
OriginX = "400"
OriginY = "75"
/>
<!-- "Open file" with "fi" ligature -->
<Glyphs
FontUri = "C:\WINDOWS\Fonts\TIMES.TTF"
FontRenderingEmSize = "36"
StyleSimulations = "BoldSimulation"
UnicodeString = "Open file"
Indices = ";;;;;(2:1)191"
Fill = "SlateGray"
OriginX = "400"
OriginY = "150"
/>
</Canvas>