DirectWrite API Reference
This section provides detailed reference information for the DirectWrite API, covering interfaces, structures, enumerations, and functions used for high-quality typography in Windows.
Interfaces
IDWriteFactory
interface IDWriteFactory : IUnknown
The factory object is the entry point for DirectWrite. It's used to create other DirectWrite objects, such as text formats, text layouts, and renderers.
Remarks: Create this object using DWriteCreateFactory.
IDWriteTextFormat
interface IDWriteTextFormat : IUnknown
Represents the text formatting information, such as font family, font size, font weight, font style, and paragraph alignment.
IDWriteTextLayout
interface IDWriteTextLayout : IDWriteTextAnalysisSink
Represents a block of text that is analyzed and laid out, enabling rich text formatting and complex script shaping.
IDWriteGlyphRunAnalysis
interface IDWriteGlyphRunAnalysis : IUnknown
Provides information about a glyph run, such as its font face, rendering mode, and transformations.
IDWriteTextRenderer
interface IDWriteTextRenderer : IUnknown
An abstract interface implemented by the application to receive drawing commands for rendering text.
Structures
DWRITE_FONT_METRICS
struct DWRITE_FONT_METRICS
Contains font-wide metrics. These metrics are logical values that do not depend on the specific device or scaling factor.
DWRITE_TEXT_RANGE
struct DWRITE_TEXT_RANGE
Specifies a range of characters within a text string.
DWRITE_RECT
struct DWRITE_RECT
Specifies a rectangular area using the coordinates of the top-left and bottom-right corners.
Enumerations
DWRITE_FONT_WEIGHT
enum DWRITE_FONT_WEIGHT
Specifies the weight (boldness) of a font.
DWRITE_FONT_STYLE
enum DWRITE_FONT_STYLE
Specifies the style of a font (normal, italic, or oblique).
DWRITE_TEXT_ALIGNMENT
enum DWRITE_TEXT_ALIGNMENT
Specifies the horizontal text alignment relative to the layout box.