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rpcs3/minidx12/Include/dwrite_3.h
Vincent Lejeune a462b4518c d3d12: Move d3d12 files to separate solution. 
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//+--------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// Abstract:
// DirectX Typography Services public API definitions.
//
//----------------------------------------------------------------------------
#ifndef DWRITE_3_H_INCLUDED
#define DWRITE_3_H_INCLUDED
#if _MSC_VER > 1000
#pragma once
#endif
#include <DWrite_2.h>
interface IDWriteFontFaceReference;
interface IDWriteFont3;
interface IDWriteFontFace3;
interface IDWriteFontFaceReference;
interface IDWriteFontSet;
interface IDWriteFontSetBuilder;
interface IDWriteFontCollection1;
interface IDWriteFontFamily1;
interface IDWriteStringList;
interface IDWriteFontDownloadQueue;
/// <summary>
/// A font resource could not be accessed because it was remote. This can happen
/// when calling CreateFontFace on a non-local font or trying to measure/draw
/// glyphs that are not downloaded yet.
/// </summary>
#ifndef DWRITE_E_REMOTEFONT
#define DWRITE_E_REMOTEFONT _HRESULT_TYPEDEF_(0x8898500DL)
#endif
/// <summary>
/// The download was canceled, which happens if the application calls
/// IDWriteFontDownloadQueue::CancelDownload before they finish.
/// </summary>
#ifndef DWRITE_E_DOWNLOADCANCELLED
#define DWRITE_E_DOWNLOADCANCELLED _HRESULT_TYPEDEF_(0x8898500EL)
#endif
/// <summary>
/// The download failed to complete because the remote resource is missing
/// or the network is down.
/// </summary>
#ifndef DWRITE_E_DOWNLOADFAILED
#define DWRITE_E_DOWNLOADFAILED _HRESULT_TYPEDEF_(0x8898500FL)
#endif
/// <summary>
/// A download request was not added or a download failed because there
/// are too many active downloads.
/// </summary>
#ifndef DWRITE_E_TOOMANYDOWNLOADS
#define DWRITE_E_TOOMANYDOWNLOADS _HRESULT_TYPEDEF_(0x88985010L)
#endif
/// <summary>
/// The font property enumeration identifies a string in a font.
/// </summary>
enum DWRITE_FONT_PROPERTY_ID
{
/// <summary>
/// Unspecified font property identifier.
/// </summary>
DWRITE_FONT_PROPERTY_ID_NONE,
/// <summary>
/// Family name for the weight-width-slope model.
/// </summary>
DWRITE_FONT_PROPERTY_ID_FAMILY_NAME,
/// <summary>
/// Family name preferred by the designer. This enables font designers to group more than four fonts in a single family without losing compatibility with
/// GDI. This name is typically only present if it differs from the GDI-compatible family name.
/// </summary>
DWRITE_FONT_PROPERTY_ID_PREFERRED_FAMILY_NAME,
/// <summary>
/// Face name of the (e.g., Regular or Bold).
/// </summary>
DWRITE_FONT_PROPERTY_ID_FACE_NAME,
/// <summary>
/// The full name of the font, e.g. "Arial Bold", from name id 4 in the name table.
/// </summary>
DWRITE_FONT_PROPERTY_ID_FULL_NAME,
/// <summary>
/// GDI-compatible family name. Because GDI allows a maximum of four fonts per family, fonts in the same family may have different GDI-compatible family names
/// (e.g., "Arial", "Arial Narrow", "Arial Black").
/// </summary>
DWRITE_FONT_PROPERTY_ID_WIN32_FAMILY_NAME,
/// <summary>
/// The postscript name of the font, e.g. "GillSans-Bold" from name id 6 in the name table.
/// </summary>
DWRITE_FONT_PROPERTY_ID_POSTSCRIPT_NAME,
/// <summary>
/// Script/language tag to identify the scripts or languages that the font was
/// primarily designed to support.
/// </summary>
/// <remarks>
/// The design script/language tag is meant to be understood from the perspective of
/// users. For example, a font is considered designed for English if it is considered
/// useful for English users. Note that this is different from what a font might be
/// capable of supporting. For example, the Meiryo font was primarily designed for
/// Japanese users. While it is capable of displaying English well, it was not
/// meant to be offered for the benefit of non-Japanese-speaking English users.
///
/// As another example, a font designed for Chinese may be capable of displaying
/// Japanese text, but would likely look incorrect to Japanese users.
///
/// The valid values for this property are "ScriptLangTag" values. These are adapted
/// from the IETF BCP 47 specification, "Tags for Identifying Languages" (see
/// http://tools.ietf.org/html/bcp47). In a BCP 47 language tag, a language subtag
/// element is mandatory and other subtags are optional. In a ScriptLangTag, a
/// script subtag is mandatory and other subtags are option. The following
/// augmented BNF syntax, adapted from BCP 47, is used:
///
/// ScriptLangTag = [language "-"]
/// script
/// ["-" region]
/// *("-" variant)
/// *("-" extension)
/// ["-" privateuse]
///
/// The expansion of the elements and the intended semantics associated with each
/// are as defined in BCP 47. Script subtags are taken from ISO 15924. At present,
/// no extensions are defined, and any extension should be ignored. Private use
/// subtags are defined by private agreement between the source and recipient and
/// may be ignored.
///
/// Subtags must be valid for use in BCP 47 and contained in the Language Subtag
/// Registry maintained by IANA. (See
/// http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
/// and section 3 of BCP 47 for details.
///
/// Any ScriptLangTag value not conforming to these specifications is ignored.
///
/// Examples:
/// "Latn" denotes Latin script (and any language or writing system using Latin)
/// "Cyrl" denotes Cyrillic script
/// "sr-Cyrl" denotes Cyrillic script as used for writing the Serbian language;
/// a font that has this property value may not be suitable for displaying
/// text in Russian or other languages written using Cyrillic script
/// "Jpan" denotes Japanese writing (Han + Hiragana + Katakana)
///
/// When passing this property to GetPropertyValues, use the overload which does
/// not take a language parameter, since this property has no specific language.
/// </remarks>
DWRITE_FONT_PROPERTY_ID_DESIGN_SCRIPT_LANGUAGE_TAG,
/// <summary>
/// Script/language tag to identify the scripts or languages that the font declares
/// it is able to support.
/// </summary>
DWRITE_FONT_PROPERTY_ID_SUPPORTED_SCRIPT_LANGUAGE_TAG,
/// <summary>
/// Semantic tag to describe the font (e.g. Fancy, Decorative, Handmade, Sans-serif, Swiss, Pixel, Futuristic).
/// </summary>
DWRITE_FONT_PROPERTY_ID_SEMANTIC_TAG,
/// <summary>
/// Weight of the font represented as a decimal string in the range 1-999.
/// </summary>
DWRITE_FONT_PROPERTY_ID_WEIGHT,
/// <summary>
/// Stretch of the font represented as a decimal string in the range 1-9.
/// </summary>
DWRITE_FONT_PROPERTY_ID_STRETCH,
/// <summary>
/// Stretch of the font represented as a decimal string in the range 0-2.
/// </summary>
DWRITE_FONT_PROPERTY_ID_STYLE,
/// <summary>
/// Total number of properties.
/// </summary>
/// <remarks>
/// DWRITE_FONT_PROPERTY_ID_TOTAL cannot be used as a property ID.
/// </remarks>
DWRITE_FONT_PROPERTY_ID_TOTAL,
};
/// <summary>
/// Font property used for filtering font sets and
/// building a font set with explicit properties.
/// </summary>
struct DWRITE_FONT_PROPERTY
{
/// <summary>
/// Specifies the requested font property, such as DWRITE_FONT_PROPERTY_ID_FAMILY_NAME.
/// </summary>
DWRITE_FONT_PROPERTY_ID propertyId;
/// <summary>
/// Specifies the property value, such as "Segoe UI".
/// </summary>
_Field_z_ WCHAR const* propertyValue;
/// <summary>
/// Specifies the language / locale to use, such as "en-US".
/// </summary>
/// <remarks>
/// When passing property information to AddFontFaceReference, localeName indicates
/// the language of the property value. BCP 47 language tags should be used. If a
/// property value is inherently non-linguistic, this can be left empty.
///
/// When used for font set filtering, leave this empty: a match will be found
/// regardless of language associated with property values.
/// </remarks>
_Field_z_ _Maybenull_ WCHAR const* localeName;
};
/// <summary>
/// Specifies the locality of a resource.
/// </summary>
enum DWRITE_LOCALITY
{
/// <summary>
/// The resource is remote, and information is unknown yet, including the file size and date.
/// Attempting to create a font or file stream will fail until locality becomes at least partial.
/// </summary>
DWRITE_LOCALITY_REMOTE,
/// <summary>
/// The resource is partially local, meaning you can query the size and date of the file
/// stream, and you may be able to create a font face and retrieve the particular glyphs
/// for metrics and drawing, but not all the glyphs will be present.
/// </summary>
DWRITE_LOCALITY_PARTIAL,
/// <summary>
/// The resource is completely local, and all font functions can be called
/// without concern of missing data or errors related to network connectivity.
/// </summary>
DWRITE_LOCALITY_LOCAL,
};
/// <summary>
/// Represents a method of rendering glyphs.
/// </summary>
enum DWRITE_RENDERING_MODE1
{
/// <summary>
/// Specifies that the rendering mode is determined automatically based on the font and size.
/// </summary>
DWRITE_RENDERING_MODE1_DEFAULT = DWRITE_RENDERING_MODE_DEFAULT,
/// <summary>
/// Specifies that no antialiasing is performed. Each pixel is either set to the foreground
/// color of the text or retains the color of the background.
/// </summary>
DWRITE_RENDERING_MODE1_ALIASED = DWRITE_RENDERING_MODE_ALIASED,
/// <summary>
/// Specifies that antialiasing is performed in the horizontal direction and the appearance
/// of glyphs is layout-compatible with GDI using CLEARTYPE_QUALITY. Use DWRITE_MEASURING_MODE_GDI_CLASSIC
/// to get glyph advances. The antialiasing may be either ClearType or grayscale depending on
/// the text antialiasing mode.
/// </summary>
DWRITE_RENDERING_MODE1_GDI_CLASSIC = DWRITE_RENDERING_MODE_GDI_CLASSIC,
/// <summary>
/// Specifies that antialiasing is performed in the horizontal direction and the appearance
/// of glyphs is layout-compatible with GDI using CLEARTYPE_NATURAL_QUALITY. Glyph advances
/// are close to the font design advances, but are still rounded to whole pixels. Use
/// DWRITE_MEASURING_MODE_GDI_NATURAL to get glyph advances. The antialiasing may be either
/// ClearType or grayscale depending on the text antialiasing mode.
/// </summary>
DWRITE_RENDERING_MODE1_GDI_NATURAL = DWRITE_RENDERING_MODE_GDI_NATURAL,
/// <summary>
/// Specifies that antialiasing is performed in the horizontal direction. This rendering
/// mode allows glyphs to be positioned with subpixel precision and is therefore suitable
/// for natural (i.e., resolution-independent) layout. The antialiasing may be either
/// ClearType or grayscale depending on the text antialiasing mode.
/// </summary>
DWRITE_RENDERING_MODE1_NATURAL = DWRITE_RENDERING_MODE_NATURAL,
/// <summary>
/// Similar to natural mode except that antialiasing is performed in both the horizontal
/// and vertical directions. This is typically used at larger sizes to make curves and
/// diagonal lines look smoother. The antialiasing may be either ClearType or grayscale
/// depending on the text antialiasing mode.
/// </summary>
DWRITE_RENDERING_MODE1_NATURAL_SYMMETRIC = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC,
/// <summary>
/// Specifies that rendering should bypass the rasterizer and use the outlines directly.
/// This is typically used at very large sizes.
/// </summary>
DWRITE_RENDERING_MODE1_OUTLINE = DWRITE_RENDERING_MODE_OUTLINE,
/// <summary>
/// Similar to natural symmetric mode except that when possible, text should be rasterized
/// in a downsampled form.
/// </summary>
DWRITE_RENDERING_MODE1_NATURAL_SYMMETRIC_DOWNSAMPLED,
};
/// <summary>
/// The interface that represents text rendering settings for glyph rasterization and filtering.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("b7924baa-391b-412a-8c5c-e44cc2d867dc") IDWriteRenderingParams3 : public IDWriteRenderingParams2
{
/// <summary>
/// Gets the rendering mode.
/// </summary>
STDMETHOD_(DWRITE_RENDERING_MODE1, GetRenderingMode1)() PURE;
};
/// <summary>
/// The root factory interface for all DWrite objects.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("9a1b41c3-d3bb-466a-87fc-fe67556a3b65") IDWriteFactory3 : public IDWriteFactory2
{
/// <summary>
/// Creates a glyph run analysis object, which encapsulates information
/// used to render a glyph run.
/// </summary>
/// <param name="glyphRun">Structure specifying the properties of the glyph run.</param>
/// <param name="transform">Optional transform applied to the glyphs and their positions. This transform is applied after the
/// scaling specified by the emSize.</param>
/// <param name="renderingMode">Specifies the rendering mode, which must be one of the raster rendering modes (i.e., not default
/// and not outline).</param>
/// <param name="measuringMode">Specifies the method to measure glyphs.</param>
/// <param name="gridFitMode">How to grid-fit glyph outlines. This must be non-default.</param>
/// <param name="baselineOriginX">Horizontal position of the baseline origin, in DIPs.</param>
/// <param name="baselineOriginY">Vertical position of the baseline origin, in DIPs.</param>
/// <param name="glyphRunAnalysis">Receives a pointer to the newly created object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateGlyphRunAnalysis)(
_In_ DWRITE_GLYPH_RUN const* glyphRun,
_In_opt_ DWRITE_MATRIX const* transform,
DWRITE_RENDERING_MODE1 renderingMode,
DWRITE_MEASURING_MODE measuringMode,
DWRITE_GRID_FIT_MODE gridFitMode,
DWRITE_TEXT_ANTIALIAS_MODE antialiasMode,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
_COM_Outptr_ IDWriteGlyphRunAnalysis** glyphRunAnalysis
) PURE;
using IDWriteFactory::CreateGlyphRunAnalysis;
using IDWriteFactory2::CreateGlyphRunAnalysis;
/// <summary>
/// Creates a rendering parameters object with the specified properties.
/// </summary>
/// <param name="gamma">The gamma value used for gamma correction, which must be greater than zero and cannot exceed 256.</param>
/// <param name="enhancedContrast">The amount of contrast enhancement, zero or greater.</param>
/// <param name="grayscaleEnhancedContrast">The amount of contrast enhancement to use for grayscale antialiasing, zero or greater.</param>
/// <param name="clearTypeLevel">The degree of ClearType level, from 0.0f (no ClearType) to 1.0f (full ClearType).</param>
/// <param name="pixelGeometry">The geometry of a device pixel.</param>
/// <param name="renderingMode">Method of rendering glyphs. In most cases, this should be DWRITE_RENDERING_MODE_DEFAULT to automatically use an appropriate mode.</param>
/// <param name="gridFitMode">How to grid fit glyph outlines. In most cases, this should be DWRITE_GRID_FIT_DEFAULT to automatically choose an appropriate mode.</param>
/// <param name="renderingParams">Holds the newly created rendering parameters object, or NULL in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateCustomRenderingParams)(
FLOAT gamma,
FLOAT enhancedContrast,
FLOAT grayscaleEnhancedContrast,
FLOAT clearTypeLevel,
DWRITE_PIXEL_GEOMETRY pixelGeometry,
DWRITE_RENDERING_MODE1 renderingMode,
DWRITE_GRID_FIT_MODE gridFitMode,
_COM_Outptr_ IDWriteRenderingParams3** renderingParams
) PURE;
using IDWriteFactory::CreateCustomRenderingParams;
using IDWriteFactory1::CreateCustomRenderingParams;
using IDWriteFactory2::CreateCustomRenderingParams;
/// <summary>
/// Creates a reference to a font given a full path.
/// </summary>
/// <param name="filePath">Absolute file path. Subsequent operations on the constructed object may fail
/// if the user provided filePath doesn't correspond to a valid file on the disk.</param>
/// <param name="lastWriteTime">Last modified time of the input file path. If the parameter is omitted,
/// the function will access the font file to obtain its last write time, so the clients are encouraged to specify this value
/// to avoid extra disk access. Subsequent operations on the constructed object may fail
/// if the user provided lastWriteTime doesn't match the file on the disk.</param>
/// <param name="faceIndex">The zero based index of a font face in cases when the font files contain a collection of font faces.
/// If the font files contain a single face, this value should be zero.</param>
/// <param name="fontFaceSimulationFlags">Font face simulation flags for algorithmic emboldening and italicization.</param>
/// <param name="fontFaceReference">Contains newly created font face reference object, or nullptr in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateFontFaceReference)(
_In_z_ WCHAR const* filePath,
_In_opt_ FILETIME const* lastWriteTime,
UINT32 faceIndex,
DWRITE_FONT_SIMULATIONS fontSimulations,
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
/// <summary>
/// Creates a reference to a font given a file.
/// </summary>
/// <param name="fontFiles">User provided font file representing the font face.</param>
/// <param name="faceIndex">The zero based index of a font face in cases when the font files contain a collection of font faces.
/// If the font files contain a single face, this value should be zero.</param>
/// <param name="fontFaceSimulationFlags">Font face simulation flags for algorithmic emboldening and italicization.</param>
/// <param name="fontFaceReference">Contains newly created font face reference object, or nullptr in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateFontFaceReference)(
_In_ IDWriteFontFile* fontFile,
UINT32 faceIndex,
DWRITE_FONT_SIMULATIONS fontSimulations,
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
/// <summary>
/// Retrieves the list of system fonts.
/// </summary>
/// <param name="fontSet">Holds the newly created font set object, or NULL in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetSystemFontSet)(
_COM_Outptr_ IDWriteFontSet** fontSet
) PURE;
/// <summary>
/// Creates an empty font set builder to add font face references
/// and create a custom font set.
/// </summary>
/// <param name="fontSetBuilder">Holds the newly created font set builder object, or NULL in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateFontSetBuilder)(
_COM_Outptr_ IDWriteFontSetBuilder** fontSetBuilder
) PURE;
/// <summary>
/// Create a weight/width/slope tree from a set of fonts.
/// </summary>
/// <param name="fontSet">A set of fonts to use to build the collection.</param>
/// <param name="fontCollection">Holds the newly created font collection object, or NULL in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CreateFontCollectionFromFontSet)(
IDWriteFontSet* fontSet,
_COM_Outptr_ IDWriteFontCollection1** fontCollection
) PURE;
/// <summary>
/// Retrieves a weight/width/slope tree of system fonts.
/// </summary>
/// <param name="includeDownloadableFonts">Include cloud fonts or only locally installed ones.</param>
/// <param name="fontCollection">Holds the newly created font collection object, or NULL in
/// case of failure.</param>
/// <param name="checkForUpdates">If this parameter is nonzero, the function performs an immediate check for changes
/// to the set of system fonts. If this parameter is FALSE, the function will still detect changes if the font
/// cache service is running, but there may be some latency. For example, an application might specify TRUE if
/// it has itself just installed a font and wants to be sure the font collection contains that font.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetSystemFontCollection)(
BOOL includeDownloadableFonts,
_COM_Outptr_ IDWriteFontCollection1** fontCollection,
BOOL checkForUpdates = FALSE
) PURE;
using IDWriteFactory2::GetSystemFontCollection;
/// <summary>
/// Gets the font download queue associated with this factory object.
/// </summary>
/// <param name="IDWriteFontDownloadQueue">Receives a pointer to the font download queue interface.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontDownloadQueue)(
_COM_Outptr_ IDWriteFontDownloadQueue** fontDownloadQueue
) PURE;
};
interface DWRITE_DECLARE_INTERFACE("53585141-D9F8-4095-8321-D73CF6BD116B") IDWriteFontSet : public IUnknown
{
/// <summary>
/// Get the number of total fonts in the set.
/// </summary>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD_(UINT32, GetFontCount)() PURE;
/// <summary>
/// Get a reference to the font at this index, which may be local or remote.
/// </summary>
/// <param name="listIndex">Zero-based index of the font.</param>
/// <param name="fontFaceReference">Receives a pointer the font face reference object, or nullptr on failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFaceReference)(
UINT32 listIndex,
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
/// <summary>
/// Gets the index of the matching font face reference in the font set, with the same file, face index, and simulations.
/// </summary>
/// <param name="fontFaceReference">Font face reference object that specifies the physical font.</param>
/// <param name="listIndex">Receives the zero-based index of the matching font if the font was found, or UINT_MAX otherwise.</param>
/// <param name="exists">Receives TRUE if the font exists or FALSE otherwise.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(FindFontFaceReference)(
IDWriteFontFaceReference* fontFaceReference,
_Out_ UINT32* listIndex,
_Out_ BOOL* exists
) PURE;
/// <summary>
/// Gets the index of the matching font face reference in the font set, with the same file, face index, and simulations.
/// </summary>
/// <param name="fontFaceReference">Font face object that specifies the physical font.</param>
/// <param name="listIndex">Receives the zero-based index of the matching font if the font was found, or UINT_MAX otherwise.</param>
/// <param name="exists">Receives TRUE if the font exists or FALSE otherwise.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(FindFontFace)(
IDWriteFontFace* fontFace,
_Out_ UINT32* listIndex,
_Out_ BOOL* exists
) PURE;
/// <summary>
/// Returns the property values of a specific font item index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font.</param>
/// <param name="propertyID">Font property of interest.</param>
/// <param name="exists">Receives the value TRUE if the font contains the specified property identifier or FALSE if not.</param>
/// <param name="strings">Receives a pointer to the newly created localized strings object, or nullptr on failure or non-existent property.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetPropertyValues)(
UINT32 listIndex,
DWRITE_FONT_PROPERTY_ID propertyId,
_Out_ BOOL* exists,
_COM_Outptr_result_maybenull_ IDWriteLocalizedStrings** values
) PURE;
/// <summary>
/// Returns all unique property values in the set, which can be used
/// for purposes such as displaying a family list or tag cloud. Values are
/// returned in priority order according to the language list, such that if
/// a font contains more than one localized name, the preferred one will be
/// returned.
/// </summary>
/// <param name="propertyID">Font property of interest.</param>
/// <param name="preferredLocaleNames">List of semicolon delimited language names in preferred
/// order. When a particular string like font family has more than one localized name,
/// the first match is returned.</param>
/// <param name="stringsList">Receives a pointer to the newly created strings list.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// For example, suppose the font set includes the Meiryo family, which has both Japanese and English family names.
/// The returned list of distinct family names would include either the Japanese name (if "ja-jp" was specified as
/// a preferred locale) or the English name (in all other cases).
/// </remarks>
STDMETHOD(GetPropertyValues)(
DWRITE_FONT_PROPERTY_ID propertyID,
_In_z_ WCHAR const* preferredLocaleNames,
_COM_Outptr_ IDWriteStringList** values
) PURE;
/// <summary>
/// Returns all unique property values in the set, which can be used
/// for purposes such as displaying a family list or tag cloud. All values
/// are returned regardless of language, including all localized names.
/// </summary>
/// <param name="propertyID">Font property of interest.</param>
/// <param name="stringsList">Receives a pointer to the newly created strings list.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// For example, suppose the font set includes the Meiryo family, which has both Japanese and English family names.
/// The returned list of distinct family names would include both the Japanese and English names.
/// </remarks>
STDMETHOD(GetPropertyValues)(
DWRITE_FONT_PROPERTY_ID propertyID,
_COM_Outptr_ IDWriteStringList** values
) PURE;
/// <summary>
/// Returns how many times a given property value occurs in the set.
/// </summary>
/// <param name="property">Font property of interest.</param>
/// <param name="propertyOccurrenceCount">How many times that property occurs.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// For example, the family name "Segoe UI" may return a count of 12,
/// whereas Harrington only has 1.
/// </remarks>
STDMETHOD(GetPropertyOccurrenceCount)(
_In_ DWRITE_FONT_PROPERTY const* property,
_Out_ UINT32* propertyOccurrenceCount
) PURE;
/// <summary>
/// Returns a subset of fonts filtered by the given properties.
/// </summary>
/// <param name="properties">List of properties to filter using.</param>
/// <param name="propertyCount">How many properties to filter.</param>
/// <param name="filteredSet">Subset of fonts that match the properties,
/// or nullptr on failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// If no fonts matched the filter, the subset will be empty (GetFontCount
/// returns 0), but the function does not return an error. The subset will
/// always be equal to or less than the original set.
/// </remarks>
STDMETHOD(GetMatchingFonts)(
_In_reads_(propertyCount) DWRITE_FONT_PROPERTY const* properties,
UINT32 propertyCount,
_COM_Outptr_ IDWriteFontSet** filteredSet
) PURE;
/// <summary>
/// Returns a list of fonts within the given WWS family prioritized by
/// WWS distance.
/// </summary>
/// <param name="familyName">Neutral or localized family name of font.</param>
/// <param name="fontWeight">Weight of font.</param>
/// <param name="fontStretch">Stretch of font.</param>
/// <param name="fontStyle">Slope of font.</param>
/// <param name="filteredSet">Subset of fonts that match the properties,
/// or nullptr on failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// The returned list can include simulated bold and oblique variants,
/// which would be useful for font fallback selection.
/// </remarks>
STDMETHOD(GetMatchingFonts)(
_In_z_ WCHAR const* familyName,
DWRITE_FONT_WEIGHT fontWeight,
DWRITE_FONT_STRETCH fontStretch,
DWRITE_FONT_STYLE fontStyle,
_COM_Outptr_ IDWriteFontSet** filteredSet
) PURE;
};
interface DWRITE_DECLARE_INTERFACE("2F642AFE-9C68-4F40-B8BE-457401AFCB3D") IDWriteFontSetBuilder : public IUnknown
{
/// <summary>
/// Adds a reference to a font to the set being built. The necessary
/// metadata will automatically be extracted from the font upon calling
/// CreateFontSet.
/// </summary>
/// <param name="fontFaceReference">Font face reference object to add to the set.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(AddFontFaceReference)(
_In_ IDWriteFontFaceReference* fontFaceReference
) PURE;
/// <summary>
/// Adds a reference to a font to the set being built. The caller
/// supplies enough information to search on, avoiding the need to open
/// the potentially non-local font. Any properties not supplied by the
/// caller will be missing, and those properties will not be available as
/// filters in GetMatchingFonts. GetPropertyValues for missing properties
/// will return an empty string list. The properties passed should generally
/// be consistent with the actual font contents, but they need not be. You
/// could, for example, alias a font using a different name or unique
/// identifier, or you could set custom tags not present in the actual
/// font.
/// </summary>
/// <param name="fontFaceReference">Reference to the font.</param>
/// <param name="properties">List of properties to associate with the reference.</param>
/// <param name="propertyCount">How many properties are defined.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(AddFontFaceReference)(
_In_ IDWriteFontFaceReference* fontFaceReference,
_In_reads_(propertyCount) DWRITE_FONT_PROPERTY const* properties,
UINT32 propertyCount
) PURE;
/// <summary>
/// Appends an existing font set to the one being built, allowing
/// one to aggregate two sets or to essentially extend an existing one.
/// </summary>
/// <param name="fontSet">Font set to append font face references from.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(AddFontSet)(
_In_ IDWriteFontSet* fontSet
) PURE;
/// <summary>
/// Creates a font set from all the font face references added so
/// far via AddFontFaceReference.
/// </summary>
/// <param name="fontSet">Contains newly created font set object,
/// or nullptr in case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// Creating a font set takes less time if the references were added
/// with metadata rather than needing to extract the metadata from the
/// font file.
/// </remarks>
STDMETHOD(CreateFontSet)(
_COM_Outptr_ IDWriteFontSet** fontSet
) PURE;
};
interface DWRITE_DECLARE_INTERFACE("53585141-D9F8-4095-8321-D73CF6BD116C") IDWriteFontCollection1 : public IDWriteFontCollection
{
/// <summary>
/// Get the underlying font set used by this collection.
/// </summary>
/// <param name="fontSet">Contains font set used by the collection.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontSet)(
_COM_Outptr_ IDWriteFontSet** fontSet
) PURE;
/// <summary>
/// Creates a font family object given a zero-based font family index.
/// </summary>
/// <param name="index">Zero-based index of the font family.</param>
/// <param name="fontFamily">Receives a pointer the newly created font family object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFamily)(
UINT32 index,
_COM_Outptr_ IDWriteFontFamily1** fontFamily
) PURE;
using IDWriteFontCollection::GetFontFamily;
};
/// <summary>
/// The IDWriteFontFamily interface represents a set of fonts that share the same design but are differentiated
/// by weight, stretch, and style.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("DA20D8EF-812A-4C43-9802-62EC4ABD7ADF") IDWriteFontFamily1 : public IDWriteFontFamily
{
/// <summary>
/// Gets the current locality of a font given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <remarks>
/// The locality enumeration. For fully local files, the result will always
/// be DWRITE_LOCALITY_LOCAL. For downloadable files, the result depends on how
/// much of the file has been downloaded, and GetFont() fails if the locality
/// is REMOTE and potentially fails if PARTIAL. The application can explicitly
/// ask for the font to be enqueued for download via EnqueueFontDownloadRequest
/// followed by BeginDownload().
/// </remarks>
/// <returns>
/// The locality enumeration.
/// </returns>
STDMETHOD_(DWRITE_LOCALITY, GetFontLocality)(UINT32 listIndex) PURE;
/// <summary>
/// Gets a font given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <param name="font">Receives a pointer to the newly created font object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFont)(
UINT32 listIndex,
_COM_Outptr_ IDWriteFont3** font
) PURE;
using IDWriteFontFamily::GetFont;
/// <summary>
/// Gets a font face reference given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <param name="fontFaceReference">Receives a pointer to the newly created font face reference object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFaceReference)(
UINT32 listIndex,
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
};
/// <summary>
/// The IDWriteFontList interface represents a list of fonts.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("DA20D8EF-812A-4C43-9802-62EC4ABD7ADE") IDWriteFontList1 : public IDWriteFontList
{
/// <summary>
/// Gets the current locality of a font given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <remarks>
/// The locality enumeration. For fully local files, the result will always
/// be DWRITE_LOCALITY_LOCAL. For downloadable files, the result depends on how
/// much of the file has been downloaded, and GetFont() fails if the locality
/// is REMOTE and potentially fails if PARTIAL. The application can explicitly
/// ask for the font to be enqueued for download via EnqueueFontDownloadRequest
/// followed by BeginDownload().
/// </remarks>
/// <returns>
/// The locality enumeration.
/// </returns>
STDMETHOD_(DWRITE_LOCALITY, GetFontLocality)(UINT32 listIndex) PURE;
/// <summary>
/// Gets a font given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <param name="font">Receives a pointer to the newly created font object.</param>
/// <returns>
/// Standard HRESULT error code. The function returns DWRITE_E_REMOTEFONT if it could not construct a remote font.
/// </returns>
STDMETHOD(GetFont)(
UINT32 listIndex,
_COM_Outptr_ IDWriteFont3** font
) PURE;
using IDWriteFontList::GetFont;
/// <summary>
/// Gets a font face reference given its zero-based index.
/// </summary>
/// <param name="listIndex">Zero-based index of the font in the font list.</param>
/// <param name="fontFaceReference">Receives a pointer to the newly created font face reference object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFaceReference)(
UINT32 listIndex,
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
};
/// <summary>
/// A uniquely identifying reference to a font, from which you can create a font
/// face to query font metrics and use for rendering. A font face reference
/// consists of a font file, font face index, and font face simulation. The file
/// data may or may not be physically present on the local machine yet.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("5E7FA7CA-DDE3-424C-89F0-9FCD6FED58CD") IDWriteFontFaceReference : public IUnknown
{
/// <summary>
/// Creates a font face from the reference for use with layout,
/// shaping, or rendering.
/// </summary>
/// <param name="fontFace">Newly created font face object, or nullptr in the case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// This function can fail with DWRITE_E_REMOTEFONT if the font is not local.
/// </remarks>
STDMETHOD(CreateFontFace)(
_COM_Outptr_ IDWriteFontFace3** fontFace
) PURE;
/// <summary>
/// Creates a font face with alternate font simulations, for example, to
/// explicitly simulate a bold font face out of a regular variant.
/// </summary>
/// <param name="fontFaceSimulationFlags">Font face simulation flags for algorithmic emboldening and italicization.</param>
/// <param name="fontFace">Newly created font face object, or nullptr in the case of failure.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// This function can fail with DWRITE_E_REMOTEFONT if the font is not local.
/// </remarks>
STDMETHOD(CreateFontFaceWithSimulations)(
DWRITE_FONT_SIMULATIONS fontFaceSimulationFlags,
_COM_Outptr_ IDWriteFontFace3** fontFace
) PURE;
/// <summary>
/// Compares two instances of a font face references for equality.
/// </summary>
STDMETHOD_(BOOL, Equals)(IDWriteFontFaceReference* fontFaceReference) PURE;
/// <summary>
/// Obtains the zero-based index of the font face in its font file or files. If the font files contain a single face,
/// the return value is zero.
/// </summary>
STDMETHOD_(UINT32, GetFontFaceIndex)() PURE;
/// <summary>
/// Obtains the algorithmic style simulation flags of a font face.
/// </summary>
STDMETHOD_(DWRITE_FONT_SIMULATIONS, GetSimulations)() PURE;
/// <summary>
/// Obtains the font file representing a font face.
/// </summary>
STDMETHOD(GetFontFile)(
_COM_Outptr_ IDWriteFontFile** fontFile
) PURE;
/// <summary>
/// Get the local size of the font face in bytes.
/// </summary>
/// <remarks>
/// The value returned by GetLocalFileSize will always be less than or
/// equal to the value returned by GetFullSize. If the locality is remote,
/// the GetLocalFileSize value is zero. If the locality is local, this
/// value will equal the value returned by GetFileSize. If the locality is
/// partial, this value will equal the size of the portions of the font
/// data that have been downloaded, which will be greater than zero and
/// less than or equal to the GetFileSize value.
/// </remarks>
STDMETHOD_(UINT64, GetLocalFileSize)() PURE;
/// <summary>
/// Get the total size of the font face in bytes.
/// </summary>
/// <remarks>
/// If the locality is remote, this value is unknown and will be zero.
/// If the locality is partial or local, the value is the full size of
/// the font face.
/// </remarks>
STDMETHOD_(UINT64, GetFileSize)() PURE;
/// <summary>
/// Get the last modified date.
/// </summary>
/// <remarks>
/// The time may be zero if the font file loader does not expose file time.
/// </remarks>
STDMETHOD(GetFileTime)(_Out_ FILETIME* lastWriteTime) PURE;
/// <summary>
/// Get the locality of this font face reference. You can always successfully
/// create a font face from a fully local font. Attempting to create a font
/// face on a remote or partially local font may fail with DWRITE_E_REMOTEFONT.
/// This function may change between calls depending on background downloads
/// and whether cached data expires.
/// </summary>
STDMETHOD_(DWRITE_LOCALITY, GetLocality)() PURE;
/// <summary>
/// Adds a request to the font download queue (IDWriteFontDownloadQueue).
/// </summary>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(EnqueueFontDownloadRequest)() PURE;
/// <summary>
/// Adds a request to the font download queue (IDWriteFontDownloadQueue).
/// </summary>
/// <param name="characters">Array of characters to download.</param>
/// <param name="characterCount">The number of elements in the character array.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// Downloading a character involves downloading every glyph it depends on
/// directly or indirectly, via font tables (cmap, GSUB, COLR, glyf).
/// </remarks>
STDMETHOD(EnqueueCharacterDownloadRequest)(
_In_reads_(characterCount) WCHAR const* characters,
UINT32 characterCount
) PURE;
/// <summary>
/// Adds a request to the font download queue (IDWriteFontDownloadQueue).
/// </summary>
/// <param name="glyphIndices">Array of glyph indices to download.</param>
/// <param name="glyhphCount">The number of elements in the glyph index array.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// Downloading a glyph involves downloading any other glyphs it depends on
/// from the font tables (GSUB, COLR, glyf).
/// </remarks>
STDMETHOD(EnqueueGlyphDownloadRequest)(
_In_reads_(glyphCount) UINT16 const* glyphIndices,
UINT32 glyphCount
) PURE;
/// <summary>
/// Adds a request to the font download queue (IDWriteFontDownloadQueue).
/// </summary>
/// <param name="fileOffset">Offset of the fragment from the beginning of the font file.</param>
/// <param name="fragmentSize">Size of the fragment in bytes.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(EnqueueFileFragmentDownloadRequest)(
UINT64 fileOffset,
UINT64 fragmentSize
) PURE;
};
/// <summary>
/// The IDWriteFont interface represents a font in a font collection.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("29748ED6-8C9C-4A6A-BE0B-D912E8538944") IDWriteFont3 : public IDWriteFont2
{
/// <summary>
/// Creates a font face object for the font.
/// </summary>
/// <param name="fontFace">Receives a pointer to the newly created font face object.</param>
/// <returns>
/// Standard HRESULT error code. The function returns DWRITE_E_REMOTEFONT if it could not construct a remote font.
/// </returns>
STDMETHOD(CreateFontFace)(
_COM_Outptr_ IDWriteFontFace3** fontFace
) PURE;
using IDWriteFont::CreateFontFace;
/// <summary>
/// Compares two instances of a font references for equality.
/// </summary>
STDMETHOD_(BOOL, Equals)(IDWriteFont* font) PURE;
/// <summary>
/// Return a font face reference identifying this font.
/// </summary>
/// <param name="fontFaceReference">A uniquely identifying reference to a font face.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFaceReference)(
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
/// <summary>
/// Determines whether the font supports the specified character.
/// </summary>
/// <param name="unicodeValue">Unicode (UCS-4) character value.</param>
/// <returns>
/// Returns TRUE if the font has the specified character, FALSE if not.
/// </returns>
STDMETHOD_(BOOL, HasCharacter)(
UINT32 unicodeValue
) PURE;
using IDWriteFont::HasCharacter;
/// <summary>
/// Gets the current locality of the font.
/// </summary>
/// <remarks>
/// The locality enumeration. For fully local files, the result will always
/// be DWRITE_LOCALITY_LOCAL. A downloadable file may be any of the states,
/// and this function may change between calls.
/// </remarks>
/// <returns>
/// The locality enumeration.
/// </returns>
STDMETHOD_(DWRITE_LOCALITY, GetLocality)() PURE;
};
/// <summary>
/// The interface that represents an absolute reference to a font face.
/// It contains font face type, appropriate file references and face identification data.
/// Various font data such as metrics, names and glyph outlines is obtained from IDWriteFontFace.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("D37D7598-09BE-4222-A236-2081341CC1F2") IDWriteFontFace3 : public IDWriteFontFace2
{
/// <summary>
/// Return a font face reference identifying this font.
/// </summary>
/// <param name="fontFaceReference">A uniquely identifying reference to a font face.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontFaceReference)(
_COM_Outptr_ IDWriteFontFaceReference** fontFaceReference
) PURE;
/// <summary>
/// Gets the PANOSE values from the font, used for font selection and
/// matching.
/// </summary>
/// <param name="panose">PANOSE structure to fill in.</param>
/// <remarks>
/// The function does not simulate these, such as substituting a weight or
/// proportion inferred on other values. If the font does not specify them,
/// they are all set to 'any' (0).
/// </remarks>
STDMETHOD_(void, GetPanose)(
_Out_ DWRITE_PANOSE* panose
) PURE;
/// <summary>
/// Gets the weight of the specified font.
/// </summary>
STDMETHOD_(DWRITE_FONT_WEIGHT, GetWeight)() PURE;
/// <summary>
/// Gets the stretch (aka. width) of the specified font.
/// </summary>
STDMETHOD_(DWRITE_FONT_STRETCH, GetStretch)() PURE;
/// <summary>
/// Gets the style (aka. slope) of the specified font.
/// </summary>
STDMETHOD_(DWRITE_FONT_STYLE, GetStyle)() PURE;
/// <summary>
/// Creates an localized strings object that contains the family names for the font family, indexed by locale name.
/// </summary>
/// <param name="names">Receives a pointer to the newly created localized strings object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFamilyNames)(
_COM_Outptr_ IDWriteLocalizedStrings** names
) PURE;
/// <summary>
/// Gets a localized strings collection containing the face names for the font (e.g., Regular or Bold), indexed by locale name.
/// </summary>
/// <param name="names">Receives a pointer to the newly created localized strings object.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFaceNames)(
_COM_Outptr_ IDWriteLocalizedStrings** names
) PURE;
/// <summary>
/// Gets a localized strings collection containing the specified informational strings, indexed by locale name.
/// </summary>
/// <param name="informationalStringID">Identifies the string to get.</param>
/// <param name="informationalStrings">Receives a pointer to the newly created localized strings object.</param>
/// <param name="exists">Receives the value TRUE if the font contains the specified string ID or FALSE if not.</param>
/// <returns>
/// Standard HRESULT error code. If the font does not contain the specified string, the return value is S_OK but
/// informationalStrings receives a NULL pointer and exists receives the value FALSE.
/// </returns>
STDMETHOD(GetInformationalStrings)(
DWRITE_INFORMATIONAL_STRING_ID informationalStringID,
_COM_Outptr_result_maybenull_ IDWriteLocalizedStrings** informationalStrings,
_Out_ BOOL* exists
) PURE;
/// <summary>
/// Determines whether the font supports the specified character.
/// </summary>
/// <param name="unicodeValue">Unicode (UCS-4) character value.</param>
/// <returns>
/// Returns TRUE if the font has the specified character, FALSE if not.
/// </returns>
STDMETHOD_(BOOL, HasCharacter)(
UINT32 unicodeValue
) PURE;
/// <summary>
/// Determines the recommended text rendering and grid-fit mode to be used based on the
/// font, size, world transform, and measuring mode.
/// </summary>
/// <param name="fontEmSize">Logical font size in DIPs.</param>
/// <param name="dpiX">Number of pixels per logical inch in the horizontal direction.</param>
/// <param name="dpiY">Number of pixels per logical inch in the vertical direction.</param>
/// <param name="transform">Specifies the world transform.</param>
/// <param name="outlineThreshold">Specifies the quality of the graphics system's outline rendering,
/// affects the size threshold above which outline rendering is used.</param>
/// <param name="measuringMode">Specifies the method used to measure during text layout. For proper
/// glyph spacing, the function returns a rendering mode that is compatible with the specified
/// measuring mode.</param>
/// <param name="renderingParams">Rendering parameters object. This parameter is necessary in case the rendering parameters
/// object overrides the rendering mode.</param>
/// <param name="renderingMode">Receives the recommended rendering mode.</param>
/// <param name="gridFitMode">Receives the recommended grid-fit mode.</param>
/// <remarks>
/// This method should be used to determine the actual rendering mode in cases where the rendering
/// mode of the rendering params object is DWRITE_RENDERING_MODE_DEFAULT, and the actual grid-fit
/// mode when the rendering params object is DWRITE_GRID_FIT_MODE_DEFAULT.
/// </remarks>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetRecommendedRenderingMode)(
FLOAT fontEmSize,
FLOAT dpiX,
FLOAT dpiY,
_In_opt_ DWRITE_MATRIX const* transform,
BOOL isSideways,
DWRITE_OUTLINE_THRESHOLD outlineThreshold,
DWRITE_MEASURING_MODE measuringMode,
_In_opt_ IDWriteRenderingParams* renderingParams,
_Out_ DWRITE_RENDERING_MODE1* renderingMode,
_Out_ DWRITE_GRID_FIT_MODE* gridFitMode
) PURE;
/// <summary>
/// Determines whether the character is locally downloaded from the font.
/// </summary>
/// <param name="unicodeValue">Unicode (UCS-4) character value.</param>
/// <returns>
/// Returns TRUE if the font has the specified character locally available,
/// FALSE if not or if the font does not support that character.
/// </returns>
STDMETHOD_(BOOL, IsCharacterLocal)(
UINT32 unicodeValue
) PURE;
/// <summary>
/// Determines whether the glyph is locally downloaded from the font.
/// </summary>
/// <param name="glyphId">Glyph identifier.</param>
/// <returns>
/// Returns TRUE if the font has the specified glyph locally available.
/// </returns>
STDMETHOD_(BOOL, IsGlyphLocal)(
UINT16 glyphId
) PURE;
/// <summary>
/// Determines whether the specified characters are local.
/// </summary>
/// <param name="characters">Array of characters.</param>
/// <param name="characterCount">The number of elements in the character array.</param>
/// <param name="enqueueIfNotLocal">Specifies whether to enqueue a download request
/// if any of the specified characters are not local.</param>
/// <param name="isLocal">Receives TRUE if all of the specified characters are local,
/// FALSE if any of the specified characters are remote.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(AreCharactersLocal)(
_In_reads_(characterCount) WCHAR const* characters,
UINT32 characterCount,
BOOL enqueueIfNotLocal,
_Out_ BOOL* isLocal
) PURE;
/// <summary>
/// Determines whether the specified glyphs are local.
/// </summary>
/// <param name="glyphIndices">Array of glyph indices.</param>
/// <param name="glyphCount">The number of elements in the glyph index array.</param>
/// <param name="enqueueIfNotLocal">Specifies whether to enqueue a download request
/// if any of the specified glyphs are not local.</param>
/// <param name="isLocal">Receives TRUE if all of the specified glyphs are local,
/// FALSE if any of the specified glyphs are remote.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(AreGlyphsLocal)(
_In_reads_(glyphCount) UINT16 const* glyphIndices,
UINT32 glyphCount,
BOOL enqueueIfNotLocal,
_Out_ BOOL* isLocal
) PURE;
};
/// <summary>
/// Represents a collection of strings indexed by number.
/// An IDWriteStringList is otherwise identical to IDWriteLocalizedStrings except
/// for the semantics, where localized strings are indexed on language (each
/// language has one string property) whereas a string list may contain multiple
/// strings of the same language, such as a string list of family names from a
/// font set. You can QueryInterface from an IDWriteLocalizedStrings to an
/// IDWriteStringList.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("CFEE3140-1157-47CA-8B85-31BFCF3F2D0E") IDWriteStringList : public IUnknown
{
/// <summary>
/// Gets the number of strings.
/// </summary>
STDMETHOD_(UINT32, GetCount)() PURE;
/// <summary>
/// Gets the length in characters (not including the null terminator) of the locale name with the specified index.
/// </summary>
/// <param name="listIndex">Zero-based index of the locale name.</param>
/// <param name="length">Receives the length in characters, not including the null terminator.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetLocaleNameLength)(
UINT32 listIndex,
_Out_ UINT32* length
) PURE;
/// <summary>
/// Copies the locale name with the specified index to the specified array.
/// </summary>
/// <param name="listIndex">Zero-based index of the locale name.</param>
/// <param name="localeName">Character array that receives the locale name.</param>
/// <param name="size">Size of the array in characters. The size must include space for the terminating
/// null character.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetLocaleName)(
UINT32 listIndex,
_Out_writes_z_(size) WCHAR* localeName,
UINT32 size
) PURE;
/// <summary>
/// Gets the length in characters (not including the null terminator) of the string with the specified index.
/// </summary>
/// <param name="listIndex">Zero-based index of the string.</param>
/// <param name="length">Receives the length in characters, not including the null terminator.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetStringLength)(
UINT32 listIndex,
_Out_ UINT32* length
) PURE;
/// <summary>
/// Copies the string with the specified index to the specified array.
/// </summary>
/// <param name="listIndex">Zero-based index of the string.</param>
/// <param name="stringBuffer">Character array that receives the string.</param>
/// <param name="size">Size of the array in characters. The size must include space for the terminating
/// null character.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetString)(
UINT32 listIndex,
_Out_writes_z_(stringBufferSize) WCHAR* stringBuffer,
UINT32 stringBufferSize
) PURE;
};
/// <summary>
/// Application-defined callback interface that receives notifications from the font
/// download queue (IDWriteFontDownloadQueue interface). Callbacks will occur on the
/// downloading thread, and objects must be prepared to handle calls on their methods
/// from other threads at any time.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("B06FE5B9-43EC-4393-881B-DBE4DC72FDA7") IDWriteFontDownloadListener : public IUnknown
{
/// <summary>
/// The DownloadCompleted method is called back on an arbitrary thread when a
/// download operation ends.
/// </summary>
/// <param name="downloadQueue">Pointer to the download queue interface on which
/// the BeginDownload method was called.</param>
/// <param name="context">Optional context object that was passed to BeginDownload.
/// AddRef is called on the context object by BeginDownload and Release is called
/// after the DownloadCompleted method returns.</param>
/// <param name="downloadResult">Result of the download operation.</param>
STDMETHOD_(void, DownloadCompleted)(
_In_ IDWriteFontDownloadQueue* downloadQueue,
_In_opt_ IUnknown* context,
HRESULT downloadResult
) PURE;
};
/// <summary>
/// Interface that enqueues download requests for remote fonts, characters, glyphs, and font fragments.
/// Provides methods to asynchronously execute a download, cancel pending downloads, and be notified of
/// download completion. Callbacks to listeners will occur on the downloading thread, and objects must
/// be must be able to handle calls on their methods from other threads at any time.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("B71E6052-5AEA-4FA3-832E-F60D431F7E91") IDWriteFontDownloadQueue : public IUnknown
{
/// <summary>
/// Registers a client-defined listener object that receives download notifications.
/// All registered listener's DownloadCompleted will be called after BeginDownload
/// completes.
/// </summary>
/// <param name="listener">Listener object to add.</param>
/// <param name="token">Receives a token value, which the caller must subsequently
/// pass to RemoveListener.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// An IDWriteFontDownloadListener can also be passed to BeginDownload via the
/// context parameter, rather than globally registered to the queue.
/// </remarks>
STDMETHOD(AddListener)(
IDWriteFontDownloadListener* listener,
_Out_ UINT32* token
) PURE;
/// <summary>
/// Unregisters a notification handler that was previously registered using
/// AddListener.
/// </summary>
/// <param name="token">Token value previously returned by AddListener.</param>
/// <returns>
/// Returns S_OK if successful or E_INVALIDARG if the specified token does not
/// correspond to a registered listener.
/// </returns>
STDMETHOD(RemoveListener)(
UINT32 token
) PURE;
/// <summary>
/// Determines whether the download queue is empty. Note that the queue does not
/// include requests that are already being downloaded. In other words, BeginDownload
/// clears the queue.
/// </summary>
/// <returns>
/// TRUE if the queue is empty, FALSE if there are requests pending for BeginDownload.
/// </returns>
STDMETHOD_(BOOL, IsEmpty)() PURE;
/// <summary>
/// Begins an asynchronous download operation. The download operation executes
/// in the background until it completes or is cancelled by a CancelDownload call.
/// </summary>
/// <param name="context">Optional context object that is passed back to the
/// download notification handler's DownloadCompleted method. If the context object
/// implements IDWriteFontDownloadListener, its DownloadCompleted will be called
/// when done.</param>
/// <returns>
/// Returns S_OK if a download was successfully begun, S_FALSE if the queue was
/// empty, or a standard HRESULT error code.
/// </returns>
/// <remarks>
/// BeginDownload removes all download requests from the queue, transferring them
/// to a background download operation. If any previous downloads are still ongoing
/// when BeginDownload is called again, the new download does not complete until
/// the previous downloads have finished. If the queue is empty and no active
/// downloads are pending, the DownloadCompleted callback is called immediately with
/// DWRITE_DOWNLOAD_RESULT_NONE.
/// </remarks>
STDMETHOD(BeginDownload)(
_In_opt_ IUnknown* context = nullptr
) PURE;
/// <summary>
/// Removes all download requests from the queue and cancels any active download
/// operations. This calls DownloadCompleted with DWRITE_E_DOWNLOADCANCELLED.
/// Applications should call this when shutting down if they started any
/// downloads that have not finished yet with a call to DownloadCompleted.
/// </summary>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(CancelDownload)() PURE;
/// <summary>
/// Get the current generation number of the download queue, which is incremented
/// every time after a download completes, whether failed or successful. This cookie
/// comparison value may be used to compared against cached data to know when it is
/// stale.
/// </summary>
/// <returns>
/// The number of download queue generations.
/// </returns>
STDMETHOD_(UINT64, GetGenerationCount)() PURE;
};
/// <summary>
/// The GDI interop interface provides interoperability with GDI.
/// </summary>
interface DWRITE_DECLARE_INTERFACE("4556BE70-3ABD-4F70-90BE-421780A6F515") IDWriteGdiInterop1 : public IDWriteGdiInterop
{
/// <summary>
/// Creates a font object that matches the properties specified by the LOGFONT structure.
/// </summary>
/// <param name="logFont">Structure containing a GDI-compatible font description.</param>
/// <param name="fontCollection">The font collection to search. If NULL, the local system font collection is used.</param>
/// <param name="font">Receives a newly created font object if successful, or NULL in case of error.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// The only fields that matter include: lfFaceName, lfCharSet, lfWeight, lfItalic.
/// Font size and rendering mode are a rendering time property, not a font property,
/// and text decorations like underline are drawn separately from the text. If no
/// font matches the given weight, slope, and character set, the best match within
/// the given GDI family name will be returned. DWRITE_E_NOFONT is returned if there
/// is no matching font name using either the GDI family name (e.g. Arial) or the
/// full font name (e.g. Arial Bold Italic).
/// </remarks>
STDMETHOD(CreateFontFromLOGFONT)(
_In_ LOGFONTW const* logFont,
_In_opt_ IDWriteFontCollection* fontCollection,
_COM_Outptr_ IDWriteFont** font
) PURE;
/// <summary>
/// Reads the font signature from the given font.
/// </summary>
/// <param name="font">Font to read font signature from.</param>
/// <param name="fontSignature">Font signature from the OS/2 table, ulUnicodeRange and ulCodePageRange.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontSignature)(
_In_ IDWriteFont* font,
_Out_ FONTSIGNATURE* fontSignature
) PURE;
/// <summary>
/// Reads the font signature from the given font.
/// </summary>
/// <param name="font">Font to read font signature from.</param>
/// <param name="fontSignature">Font signature from the OS/2 table, ulUnicodeRange and ulCodePageRange.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetFontSignature)(
_In_ IDWriteFontFace* fontFace,
_Out_ FONTSIGNATURE* fontSignature
) PURE;
/// <summary>
/// Get a list of matching fonts based on the LOGFONT values. Only fonts
/// of that family name will be returned.
/// </summary>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetMatchingFontsByLOGFONT)(
_In_ LOGFONT const* logFont,
_In_ IDWriteFontSet* fontSet,
_COM_Outptr_ IDWriteFontSet** filteredSet
) PURE;
};
/// <summary>
/// Information about a formatted line of text.
/// </summary>
struct DWRITE_LINE_METRICS1 : DWRITE_LINE_METRICS
{
/// <summary>
/// White space before the content of the line. This is included in the line height and baseline distances.
/// If the line is formatted horizontally either with a uniform line spacing or with proportional
/// line spacing, this value represents the extra space above the content.
/// </summary>
FLOAT leadingBefore;
/// <summary>
/// White space after the content of the line. This is included in the height of the line.
/// If the line is formatted horizontally either with a uniform line spacing or with proportional
/// line spacing, this value represents the extra space below the content.
/// </summary>
FLOAT leadingAfter;
};
/// <summary>
/// Specify whether DWRITE_FONT_METRICS::lineGap value should be part of the line metrics.
/// </summary>
enum DWRITE_FONT_LINE_GAP_USAGE
{
/// <summary>
/// The usage of the font line gap depends on the method used for text layout.
/// </summary>
DWRITE_FONT_LINE_GAP_USAGE_DEFAULT,
/// <summary>
/// The font line gap is excluded from line spacing
/// </summary>
DWRITE_FONT_LINE_GAP_USAGE_DISABLED,
/// <summary>
/// The font line gap is included in line spacing
/// </summary>
DWRITE_FONT_LINE_GAP_USAGE_ENABLED
};
/// <summary>
/// The DWRITE_LINE_SPACING structure specifies the parameters used to specify how to manage space between lines.
/// </summary>
struct DWRITE_LINE_SPACING
{
/// <summary>
/// Method used to determine line spacing.
/// </summary>
DWRITE_LINE_SPACING_METHOD method;
/// <summary>
/// Spacing between lines.
/// The interpretation of this parameter depends upon the line spacing method, as follows:
/// - default line spacing: ignored
/// - uniform line spacing: explicit distance in DIPs between lines
/// - proportional line spacing: a scaling factor to be applied to the computed line height;
/// for each line, the height of the line is computed as for default line spacing, and the scaling factor is applied to that value.
/// </summary>
FLOAT height;
/// <summary>
/// Distance from top of line to baseline.
/// The interpretation of this parameter depends upon the line spacing method, as follows:
/// - default line spacing: ignored
/// - uniform line spacing: explicit distance in DIPs from the top of the line to the baseline
/// - proportional line spacing: a scaling factor applied to the computed baseline; for each line,
/// the baseline distance is computed as for default line spacing, and the scaling factor is applied to that value.
/// </summary>
FLOAT baseline;
/// <summary>
/// Proportion of the entire leading distributed before the line. The allowed value is between 0 and 1.0. The remaining
/// leading is distributed after the line. It is ignored for the default and uniform line spacing methods.
/// The leading that is available to distribute before or after the line depends on the values of the height and
/// baseline parameters.
/// </summary>
FLOAT leadingBefore;
/// <summary>
/// Specify whether DWRITE_FONT_METRICS::lineGap value should be part of the line metrics.
/// </summary>
DWRITE_FONT_LINE_GAP_USAGE fontLineGapUsage;
};
interface DWRITE_DECLARE_INTERFACE("F67E0EDD-9E3D-4ECC-8C32-4183253DFE70") IDWriteTextFormat2 : public IDWriteTextFormat1
{
/// <summary>
/// Set line spacing.
/// </summary>
/// <param name="lineSpacing">How to manage space between lines.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(SetLineSpacing)(_In_ DWRITE_LINE_SPACING const* lineSpacingOptions) PURE;
/// <summary>
/// Get line spacing.
/// </summary>
/// <param name="lineSpacing">How to manage space between lines.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetLineSpacing)(_Out_ DWRITE_LINE_SPACING* lineSpacingOptions) PURE;
};
interface DWRITE_DECLARE_INTERFACE("07DDCD52-020E-4DE8-AC33-6C953D83F92D") IDWriteTextLayout3 : public IDWriteTextLayout2
{
/// <summary>
/// Invalidates the layout, forcing layout to remeasure before calling the
/// metrics or drawing functions. This is useful if the locality of a font
/// changes, and layout should be redrawn, or if the size of a client
/// implemented IDWriteInlineObject changes.
/// </summary>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(InvalidateLayout)() PURE;
/// <summary>
/// Set line spacing.
/// </summary>
/// <param name="lineSpacing">How to manage space between lines.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(SetLineSpacing)(_In_ DWRITE_LINE_SPACING const* lineSpacingOptions) PURE;
/// <summary>
/// Get line spacing.
/// </summary>
/// <param name="lineSpacing">How to manage space between lines.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
STDMETHOD(GetLineSpacing)(_Out_ DWRITE_LINE_SPACING* lineSpacingOptions) PURE;
/// <summary>
/// GetLineMetrics returns properties of each line.
/// </summary>
/// <param name="lineMetrics">The array to fill with line information.</param>
/// <param name="maxLineCount">The maximum size of the lineMetrics array.</param>
/// <param name="actualLineCount">The actual size of the lineMetrics
/// array that is needed.</param>
/// <returns>
/// Standard HRESULT error code.
/// </returns>
/// <remarks>
/// If maxLineCount is not large enough E_NOT_SUFFICIENT_BUFFER,
/// which is equivalent to HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER),
/// is returned and *actualLineCount is set to the number of lines
/// needed.
/// </remarks>
STDMETHOD(GetLineMetrics)(
_Out_writes_to_opt_(maxLineCount, *actualLineCount) DWRITE_LINE_METRICS1* lineMetrics,
UINT32 maxLineCount,
_Out_ UINT32* actualLineCount
) PURE;
};
#endif /* DWRITE_3_H_INCLUDED */
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