CRenderTarget Class

Artigo
12/18/2017

The latest version of this topic can be found at CRenderTarget Class.

A wrapper for ID2D1RenderTarget.

Syntax

class CRenderTarget : public CObject;

Members

Public Constructors

Name	Description
CRenderTarget::CRenderTarget	Constructs a CRenderTarget object.
CRenderTarget::~CRenderTarget	The destructor. Called when a render target object is being destroyed.

Public Methods

Name	Description
CRenderTarget::Attach	Attaches existing render target interface to the object
CRenderTarget::BeginDraw	Initiates drawing on this render target.
CRenderTarget::Clear	Clears the drawing area to the specified color.
CRenderTarget::COLORREF_TO_D2DCOLOR	Converts GDI color and alpha values to the D2D1_COLOR_F object.
CRenderTarget::CreateCompatibleRenderTarget	Creates a new bitmap render target for use during intermediate offscreen drawing that is compatible with the current render target .
CRenderTarget::Destroy	Deletes one or more resources
CRenderTarget::Detach	Detaches render target interface from the object
CRenderTarget::DrawBitmap	Draws the formatted text described by the specified IDWriteTextLayout object.
CRenderTarget::DrawEllipse	Draws the outline of the specified ellipse using the specified stroke style.
CRenderTarget::DrawGeometry	Draws the outline of the specified geometry using the specified stroke style.
CRenderTarget::DrawGlyphRun	Draws the specified glyphs.
CRenderTarget::DrawLine	Draws a line between the specified points using the specified stroke style.
CRenderTarget::DrawRectangle	Draws the outline of a rectangle that has the specified dimensions and stroke style.
CRenderTarget::DrawRoundedRectangle	Draws the outline of the specified rounded rectangle using the specified stroke style.
CRenderTarget::DrawText	Draws the specified text using the format information provided by an IDWriteTextFormat object.
CRenderTarget::DrawTextLayout	Draws the formatted text described by the specified IDWriteTextLayout object.
CRenderTarget::EndDraw	Ends drawing operations on the render target and indicates the current error state and associated tags.
CRenderTarget::FillEllipse	Paints the interior of the specified ellipse.
CRenderTarget::FillGeometry	Paints the interior of the specified geometry.
CRenderTarget::FillMesh	Paints the interior of the specified mesh.
CRenderTarget::FillOpacityMask	Applies the opacity mask described by the specified bitmap to a brush and uses that brush to paint a region of the render target.
CRenderTarget::FillRectangle	Paints the interior of the specified rectangle.
CRenderTarget::FillRoundedRectangle	Paints the interior of the specified rounded rectangle.
CRenderTarget::Flush	Executes all pending drawing commands.
CRenderTarget::GetAntialiasMode	Retrieves the current antialiasing mode for nontext drawing operations.
CRenderTarget::GetDpi	Returns the render target's dots per inch (DPI)
CRenderTarget::GetMaximumBitmapSize	Gets the maximum size, in device-dependent units (pixels), of any one bitmap dimension supported by the render target
CRenderTarget::GetPixelFormat	Retrieves the pixel format and alpha mode of the render target
CRenderTarget::GetPixelSize	Returns the size of the render target in device pixels
CRenderTarget::GetRenderTarget	Returns ID2D1RenderTarget interface
CRenderTarget::GetSize	Returns the size of the render target in device-independent pixels
CRenderTarget::GetTags	Gets the label for subsequent drawing operations.
CRenderTarget::GetTextAntialiasMode	Gets the current antialiasing mode for text and glyph drawing operations.
CRenderTarget::GetTextRenderingParams	Retrieves the render target's current text rendering options.
CRenderTarget::GetTransform	Applies the specified transform to the render target, replacing the existing transformation. All subsequent drawing operations occur in the transformed space.
CRenderTarget::IsSupported	Indicates whether the render target supports the specified properties
CRenderTarget::IsValid	Checks resource validity
CRenderTarget::PopAxisAlignedClip	Removes the last axis-aligned clip from the render target. After this method is called, the clip is no longer applied to subsequent drawing operations.
CRenderTarget::PopLayer	Stops redirecting drawing operations to the layer that is specified by the last PushLayer call.
CRenderTarget::PushAxisAlignedClip	Removes the last axis-aligned clip from the render target. After this method is called, the clip is no longer applied to subsequent drawing operations.
CRenderTarget::PushLayer	Adds the specified layer to the render target so that it receives all subsequent drawing operations until PopLayer is called.
CRenderTarget::RestoreDrawingState	Sets the render target's drawing state to that of the specified ID2D1DrawingStateBlock.
CRenderTarget::SaveDrawingState	Saves the current drawing state to the specified ID2D1DrawingStateBlock.
CRenderTarget::SetAntialiasMode	Sets the antialiasing mode of the render target. The antialiasing mode applies to all subsequent drawing operations, excluding text and glyph drawing operations.
CRenderTarget::SetDpi	Sets the dots per inch (DPI) of the render target.
CRenderTarget::SetTags	Specifies a label for subsequent drawing operations.
CRenderTarget::SetTextAntialiasMode	Specifies the antialiasing mode to use for subsequent text and glyph drawing operations.
CRenderTarget::SetTextRenderingParams	Specifies text rendering options to be applied to all subsequent text and glyph drawing operations.
CRenderTarget::SetTransform	Overloaded. Applies the specified transform to the render target, replacing the existing transformation. All subsequent drawing operations occur in the transformed space.

Protected Methods

Name	Description
CRenderTarget::VerifyResource	Verifies CD2DResource object validity; creates the object if it didn't already exist.

Public Operators

Name	Description
CRenderTarget::operator ID2D1RenderTarget*	Returns ID2D1RenderTarget interface

Protected Data Members

Name	Description
CRenderTarget::m_lstResources	A list of pointers to CD2DResource objects.
CRenderTarget::m_pRenderTarget	A pointer to an ID2D1RenderTarget object.
CRenderTarget::m_pTextFormatDefault	A pointer to CD2DTextFormat object that contains a default text format.

Inheritance Hierarchy

CObject

CRenderTarget

Requirements

Header: afxrendertarget.h

CRenderTarget::~CRenderTarget

The destructor. Called when a render target object is being destroyed.

virtual ~CRenderTarget();

CRenderTarget::Attach

Attaches existing render target interface to the object

void Attach(ID2D1RenderTarget* pRenderTarget);

Parameters

pRenderTarget
Existing render target interface. Cannot be NULL

CRenderTarget::BeginDraw

Initiates drawing on this render target.

void BeginDraw();

CRenderTarget::Clear

Clears the drawing area to the specified color.

void Clear(D2D1_COLOR_F color);

Parameters

color
The color to which the drawing area is cleared.

CRenderTarget::COLORREF_TO_D2DCOLOR

Converts GDI color and alpha values to the D2D1_COLOR_F object.

static D2D1_COLOR_F COLORREF_TO_D2DCOLOR(
    COLORREF color,  
    int nAlpha = 255);

Parameters

color
RGB value.

nAlpha

Return Value

D2D1_COLOR_F value.

CRenderTarget::CreateCompatibleRenderTarget

Creates a new bitmap render target for use during intermediate offscreen drawing that is compatible with the current render target .

BOOL CreateCompatibleRenderTarget(
    CBitmapRenderTarget& bitmapTarget,  
    CD2DSizeF sizeDesired = CD2DSizeF(0., 0.), 
    CD2DSizeU sizePixelDesired = CD2DSizeU(0, 0), 
    D2D1_PIXEL_FORMAT* desiredFormat = NULL,  
    D2D1_COMPATIBLE_RENDER_TARGET_OPTIONS options = D2D1_COMPATIBLE_RENDER_TARGET_OPTIONS_NONE);

Parameters

bitmapTarget
When this method returns, contains the address of a pointer to a new bitmap render target. This parameter is passed uninitialized.

sizeDesired
The desired size of the new render target in device-independent pixels if it should be different from the original render target, or NULL. For more information, see the Remarks section.

sizePixelDesired
The desired size of the new render target in pixels if it should be different from the original render target, or NULL. For more information, see the Remarks section.

desiredFormat
The desired pixel format and alpha mode of the new render target, or NULL. If the pixel format is set to DXGI_FORMAT_UNKNOWN or if this parameter is null, the new render target uses the same pixel format as the original render target. If the alpha mode is D2D1_ALPHA_MODE_UNKNOWN or this parameter is NULL, the alpha mode of the new render target defaults to D2D1_ALPHA_MODE_PREMULTIPLIED. For information about supported pixel formats, see Supported Pixel Formats and Alpha Modes.

options
A value that specifies whether the new render target must be compatible with GDI.

Return Value

If the method succeeds, it returns TRUE. Otherwise, it returns FALSE.

CRenderTarget::CRenderTarget

Constructs a CRenderTarget object.

CRenderTarget();

CRenderTarget::Destroy

Deletes one or more resources

BOOL Destroy(BOOL bDeleteResources = TRUE);

Parameters

bDeleteResources
If bDeleteResources is TRUE, all resources located in m_lstResources will be automatically destroyed.

Return Value

If the method succeeds, it returns TRUE. Otherwise, it returns FALSE

CRenderTarget::Detach

Detaches render target interface from the object

ID2D1RenderTarget* Detach ();

Return Value

Pointer to detached render target interface.

CRenderTarget::DrawBitmap

Draws the formatted text described by the specified IDWriteTextLayout object.

void DrawBitmap(
    CD2DBitmap* pBitmap,  
    const CD2DRectF& rectDest,  
    float fOpacity = 1.0,  
    D2D1_BITMAP_INTERPOLATION_MODE interpolationMode = D2D1_BITMAP_INTERPOLATION_MODE_LINEAR,  
    const CD2DRectF* pRectSrc = NULL);

Parameters

pBitmap
The bitmap to render.

rectDest
The size and position, in device-independent pixels in the render target's coordinate space, of the area to which the bitmap is drawn. If the rectangle is not well-ordered, nothing is drawn, but the render target does not enter an error state.

fOpacity
A value between 0.0f and 1.0f, inclusive, that specifies an opacity value to apply to the bitmap; this value is multiplied against the alpha values of the bitmap's contents.

interpolationMode
The interpolation mode to use if the bitmap is scaled or rotated by the drawing operation.

pRectSrc
The size and position, in device-independent pixels in the bitmap's coordinate space, of the area within the bitmap to draw.

CRenderTarget::DrawEllipse

Draws the outline of the specified ellipse using the specified stroke style.

void DrawEllipse(
    const CD2DEllipse& ellipse,  
    CD2DBrush* pBrush,  
    FLOAT fStrokeWidth = 1.0,  
    ID2D1StrokeStyle* strokeStyle = NULL);

Parameters

ellipse
The position and radius of the ellipse to draw, in device-independent pixels.

pBrush
The brush used to paint the ellipse's outline.

fStrokeWidth
The thickness of the ellipse's stroke. The stroke is centered on the ellipse's outline.

strokeStyle
The style of stroke to apply to the ellipse's outline, or NULL to paint a solid stroke.

CRenderTarget::DrawGeometry

Draws the outline of the specified geometry using the specified stroke style.

void DrawGeometry(
    CD2DGeometry* pGeometry,  
    CD2DBrush* pBrush,  
    FLOAT fStrokeWidth = 1.0,  
    ID2D1StrokeStyle* strokeStyle = NULL);

Parameters

pGeometry
The geometry to draw.

pBrush
The brush used to paint the geometry's stroke.

fStrokeWidth
The thickness of the geometry's stroke. The stroke is centered on the geometry's outline.

strokeStyle
The style of stroke to apply to the geometry's outline, or NULL to paint a solid stroke.

CRenderTarget::DrawGlyphRun

Draws the specified glyphs.

void DrawGlyphRun(
    const CD2DPointF& ptBaseLineOrigin,  
    const DWRITE_GLYPH_RUN& glyphRun,  
    CD2DBrush* pForegroundBrush,  
    DWRITE_MEASURING_MODE measuringMode = DWRITE_MEASURING_MODE_NATURAL);

Parameters

ptBaseLineOrigin
The origin, in device-independent pixels, of the glyphs' baseline.

glyphRun
The glyphs to render.

pForegroundBrush
The brush used to paint the specified glyphs.

measuringMode
A value that indicates how glyph metrics are used to measure text when it is formatted. The default value is DWRITE_MEASURING_MODE_NATURAL.

CRenderTarget::DrawLine

Draws a line between the specified points using the specified stroke style.

void DrawLine(
    const CD2DPointF& ptFrom,  
    const CD2DPointF& ptTo,  
    CD2DBrush* pBrush,  
    FLOAT fStrokeWidth = 1.0,  
    ID2D1StrokeStyle* strokeStyle = NULL);

Parameters

ptFrom
The start point of the line, in device-independent pixels.

ptTo
The end point of the line, in device-independent pixels.

pBrush
The brush used to paint the line's stroke.

fStrokeWidth
A value greater than or equal to 0.0f that specifies the width of the stroke. If this parameter isn't specified, it defaults to 1.0f. The stroke is centered on the line.

strokeStyle
The style of stroke to paint, or NULL to paint a solid line.

CRenderTarget::DrawRectangle

Draws the outline of a rectangle that has the specified dimensions and stroke style.

void DrawRectangle(
    const CD2DRectF& rect,  
    CD2DBrush* pBrush,  
    FLOAT fStrokeWidth = 1.0,  
    ID2D1StrokeStyle* strokeStyle = NULL);

Parameters

rect
The dimensions of the rectangle to draw, in device-independent pixels

pBrush
The brush used to paint the rectangle's stroke

fStrokeWidth
A value greater than or equal to 0.0f that specifies the width of the rectangle's stroke. The stroke is centered on the rectangle's outline.

strokeStyle
The style of stroke to paint, or NULL to paint a solid stroke.

CRenderTarget::DrawRoundedRectangle

Draws the outline of the specified rounded rectangle using the specified stroke style.

void DrawRoundedRectangle(
    const CD2DRoundedRect& rectRounded,  
    CD2DBrush* pBrush,  
    FLOAT fStrokeWidth = 1.0,  
    ID2D1StrokeStyle* strokeStyle = NULL);

Parameters

rectRounded
The dimensions of the rounded rectangle to draw, in device-independent pixels.

pBrush
The brush used to paint the rounded rectangle's outline.

fStrokeWidth
The width of the rounded rectangle's stroke. The stroke is centered on the rounded rectangle's outline. The default value is 1.0f.

strokeStyle
The style of the rounded rectangle's stroke, or NULL to paint a solid stroke. The default value is NULL.

CRenderTarget::DrawText

Draws the specified text using the format information provided by an IDWriteTextFormat object.

void DrawText(
    const CString& strText,  
    const CD2DRectF& rect,  
    CD2DBrush* pForegroundBrush,  
    CD2DTextFormat* textFormat = NULL,  
    D2D1_DRAW_TEXT_OPTIONS options = D2D1_DRAW_TEXT_OPTIONS_NONE,  
    DWRITE_MEASURING_MODE measuringMode = DWRITE_MEASURING_MODE_NATURAL);

Parameters

strText
A pointer to an array of Unicode characters to draw.

rect
The size and position of the area in which the text is drawn.

pForegroundBrush
The brush used to paint the text.

textFormat
An object that describes formatting details of the text to draw, such as the font, the font size, and flow direction.

options
A value that indicates whether the text should be snapped to pixel boundaries and whether the text should be clipped to the layout rectangle. The default value is D2D1_DRAW_TEXT_OPTIONS_NONE, which indicates that text should be snapped to pixel boundaries and it should not be clipped to the layout rectangle.

measuringMode
A value that indicates how glyph metrics are used to measure text when it is formatted. The default value is DWRITE_MEASURING_MODE_NATURAL.

CRenderTarget::DrawTextLayout

Draws the formatted text described by the specified IDWriteTextLayout object.

void DrawTextLayout(
    const CD2DPointF& ptOrigin,  
    CD2DTextLayout* textLayout,  
    CD2DBrush* pBrushForeground,  
    D2D1_DRAW_TEXT_OPTIONS options = D2D1_DRAW_TEXT_OPTIONS_NONE);

Parameters

ptOrigin
The point, described in device-independent pixels, at which the upper-left corner of the text described by textLayout is drawn.

textLayout
The formatted text to draw. Any drawing effects that do not inherit from ID2D1Resource are ignored. If there are drawing effects that inherit from ID2D1Resource that are not brushes, this method fails and the render target is put in an error state.

pBrushForeground
The brush used to paint any text in textLayout that does not already have a brush associated with it as a drawing effect (specified by the IDWriteTextLayout::SetDrawingEffect method).

CRenderTarget::EndDraw

Ends drawing operations on the render target and indicates the current error state and associated tags.

HRESULT EndDraw();

Return Value

If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

CRenderTarget::FillEllipse

Paints the interior of the specified ellipse.

void FillEllipse(
    const CD2DEllipse& ellipse,  
    CD2DBrush* pBrush);

Parameters

ellipse
The position and radius, in device-independent pixels, of the ellipse to paint.

pBrush
The brush used to paint the interior of the ellipse.

CRenderTarget::FillGeometry

Paints the interior of the specified geometry.

void FillGeometry(
    CD2DGeometry* pGeometry,  
    CD2DBrush* pBrush,  
    CD2DBrush* pOpacityBrush = NULL);

Parameters

pGeometry
The geometry to paint.

pBrush
The brush used to paint the geometry's interior.

pOpacityBrush
The opacity mask to apply to the geometry;NULL for no opacity mask. If an opacity mask (the opacityBrush parameter) is specified, brush must be an ID2D1BitmapBrush that has its x- and y-extend modes set to D2D1_EXTEND_MODE_CLAMP. For more information, see the Remarks section.

CRenderTarget::FillMesh

Paints the interior of the specified mesh.

void FillMesh(
    CD2DMesh* pMesh,  
    CD2DBrush* pBrush);

Parameters

pMesh
The mesh to paint.

pBrush
The brush used to paint the mesh.

CRenderTarget::FillOpacityMask

Applies the opacity mask described by the specified bitmap to a brush and uses that brush to paint a region of the render target.

void FillOpacityMask(
    CD2DBitmap* pOpacityMask,  
    CD2DBrush* pBrush,  
    D2D1_OPACITY_MASK_CONTENT content,  
    const CD2DRectF& rectDest,  
    const CD2DRectF& rectSrc);

Parameters

pOpacityMask
The position and radius, in device-independent pixels, of the ellipse to paint.

pBrush
The brush used to paint the region of the render target specified by destinationRectangle.

content
The type of content the opacity mask contains. The value is used to determine the color space in which the opacity mask is blended.

rectDest
The region of the render target to paint, in device-independent pixels.

rectSrc
The region of the bitmap to use as the opacity mask, in device-independent pixels.

CRenderTarget::FillRectangle

Paints the interior of the specified rectangle.

void FillRectangle(
    const CD2DRectF& rect,  
    CD2DBrush* pBrush);

Parameters

rect
The dimension of the rectangle to paint, in device-independent pixels.

pBrush
The brush used to paint the rectangle's interior.

CRenderTarget::FillRoundedRectangle

Paints the interior of the specified rounded rectangle.

void FillRoundedRectangle(
    const CD2DRoundedRect& rectRounded,  
    CD2DBrush* pBrush);

Parameters

rectRounded
The dimensions of the rounded rectangle to paint, in device independent pixels.

pBrush
The brush used to paint the interior of the rounded rectangle.

CRenderTarget::Flush

Executes all pending drawing commands.

void Flush(
    D2D1_TAG* tag1 = NULL,  
    D2D1_TAG* tag2 = NULL);

Parameters

tag1
Contains the tag for drawing operations that caused errors or 0 if there were no errors. This parameter is passed uninitialized.

tag2
Contains the tag for drawing operations that caused errors or 0 if there were no errors. This parameter is passed uninitialized.

CRenderTarget::GetAntialiasMode

Retrieves the current antialiasing mode for nontext drawing operations.

D2D1_ANTIALIAS_MODE GetAntialiasMode() const;

Return Value

Current antialiasing mode for nontext drawing operations.

CRenderTarget::GetDpi

Returns the render target's dots per inch (DPI)

CD2DSizeF GetDpi() const;

Return Value

The render target's dots per inch (DPI).

CRenderTarget::GetMaximumBitmapSize

Gets the maximum size, in device-dependent units (pixels), of any one bitmap dimension supported by the render target

UINT32 GetMaximumBitmapSize() const;

Return Value

The maximum size, in pixels, of any one bitmap dimension supported by the render target

CRenderTarget::GetPixelFormat

Retrieves the pixel format and alpha mode of the render target

D2D1_PIXEL_FORMAT GetPixelFormat() const;

Return Value

The pixel format and alpha mode of the render target

CRenderTarget::GetPixelSize

Returns the size of the render target in device pixels

CD2DSizeU GetPixelSize() const;

Return Value

The size of the render target in device pixels

CRenderTarget::GetRenderTarget

Returns ID2D1RenderTarget interface

ID2D1RenderTarget* GetRenderTarget();

Return Value

Pointer to an ID2D1RenderTarget interface or NULL if object is not initialized yet.

CRenderTarget::GetSize

Returns the size of the render target in device-independent pixels

CD2DSizeF GetSize() const;

Return Value

The current size of the render target in device-independent pixels

CRenderTarget::GetTags

Gets the label for subsequent drawing operations.

void GetTags(
    D2D1_TAG* tag1 = NULL,  
    D2D1_TAG* tag2 = NULL) const;

Parameters

tag1
Contains the first label for subsequent drawing operations. This parameter is passed uninitialized. If NULL is specified, no value is retrieved for this parameter.

tag2
Contains the second label for subsequent drawing operations. This parameter is passed uninitialized. If NULL is specified, no value is retrieved for this parameter.

CRenderTarget::GetTextAntialiasMode

Gets the current antialiasing mode for text and glyph drawing operations.

D2D1_TEXT_ANTIALIAS_MODE GetTextAntialiasMode() const;

Return Value

Current antialiasing mode for text and glyph drawing operations.

CRenderTarget::GetTextRenderingParams

Retrieves the render target's current text rendering options.

void GetTextRenderingParams(IDWriteRenderingParams** textRenderingParams);

Parameters

textRenderingParams
When this method returns, textRenderingParamscontains the address of a pointer to the render target's current text rendering options.

CRenderTarget::GetTransform

Applies the specified transform to the render target, replacing the existing transformation. All subsequent drawing operations occur in the transformed space.

void GetTransform(D2D1_MATRIX_3X2_F* transform);

Parameters

transform
The transform to apply to the render target.

CRenderTarget::IsSupported

Indicates whether the render target supports the specified properties

BOOL IsSupported(const D2D1_RENDER_TARGET_PROPERTIES& renderTargetProperties) const;

Parameters

renderTargetProperties
The render target properties to test

Return Value

TRUE if the specified render target properties are supported by this render target; otherwise, FALSE

CRenderTarget::IsValid

Checks resource validity

BOOL IsValid() const;

Return Value

TRUE if resource is valid; otherwise FALSE.

CRenderTarget::m_lstResources

A list of pointers to CD2DResource objects.

CObList m_lstResources;

CRenderTarget::m_pRenderTarget

A pointer to an ID2D1RenderTarget object.

ID2D1RenderTarget* m_pRenderTarget;

CRenderTarget::m_pTextFormatDefault

A pointer to CD2DTextFormat object that contains a default text format.

CD2DTextFormat* m_pTextFormatDefault;

CRenderTarget::operator ID2D1RenderTarget*

Returns ID2D1RenderTarget interface

operator ID2D1RenderTarget*();

Return Value

Pointer to an ID2D1RenderTarget interface or NULL if object is not initialized yet.

CRenderTarget::PopAxisAlignedClip

Removes the last axis-aligned clip from the render target. After this method is called, the clip is no longer applied to subsequent drawing operations.

void PopAxisAlignedClip();

CRenderTarget::PopLayer

Stops redirecting drawing operations to the layer that is specified by the last PushLayer call.

void PopLayer();

CRenderTarget::PushAxisAlignedClip

Removes the last axis-aligned clip from the render target. After this method is called, the clip is no longer applied to subsequent drawing operations.

void PushAxisAlignedClip(
    const CD2DRectF& rectClip,  
    D2D1_ANTIALIAS_MODE mode = D2D1_ANTIALIAS_MODE_PER_PRIMITIVE);

Parameters

rectClip
The size and position of the clipping area, in device-independent pixels.

mode
The antialiasing mode that is used to draw the edges of clip rects that have subpixel boundaries, and to blend the clip with the scene contents. The blending is performed once when the PopAxisAlignedClip method is called, and does not apply to each primitive within the layer.

CRenderTarget::PushLayer

Adds the specified layer to the render target so that it receives all subsequent drawing operations until PopLayer is called.

void PushLayer(
    const D2D1_LAYER_PARAMETERS& layerParameters,  
    CD2DLayer& layer);

Parameters

layerParameters
The content bounds, geometric mask, opacity, opacity mask, and antialiasing options for the layer.

layer
The layer that receives subsequent drawing operations.

CRenderTarget::RestoreDrawingState

Sets the render target's drawing state to that of the specified ID2D1DrawingStateBlock.

void RestoreDrawingState(ID2D1DrawingStateBlock& drawingStateBlock);

Parameters

drawingStateBlock
The new drawing state of the render target.

CRenderTarget::SaveDrawingState

Saves the current drawing state to the specified ID2D1DrawingStateBlock.

void SaveDrawingState(ID2D1DrawingStateBlock& drawingStateBlock) const;

Parameters

drawingStateBlock
When this method returns, contains the current drawing state of the render target. This parameter must be initialized before passing it to the method.

CRenderTarget::SetAntialiasMode

Sets the antialiasing mode of the render target. The antialiasing mode applies to all subsequent drawing operations, excluding text and glyph drawing operations.

void SetAntialiasMode(D2D1_ANTIALIAS_MODE antialiasMode);

Parameters

antialiasMode
The antialiasing mode for future drawing operations.

CRenderTarget::SetDpi

Sets the dots per inch (DPI) of the render target.

void SetDpi(const CD2DSizeF& sizeDPI);

Parameters

sizeDPI
A value greater than or equal to zero that specifies the horizontal/verticalDPI of the render target.

CRenderTarget::SetTags

Specifies a label for subsequent drawing operations.

void SetTags(
    D2D1_TAG tag1,  
    D2D1_TAG tag2);

Parameters

tag1
A label to apply to subsequent drawing operations.

tag2
A label to apply to subsequent drawing operations.

CRenderTarget::SetTextAntialiasMode

Specifies the antialiasing mode to use for subsequent text and glyph drawing operations.

void SetTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode);

Parameters

textAntialiasMode
The antialiasing mode to use for subsequent text and glyph drawing operations.

CRenderTarget::SetTextRenderingParams

Specifies text rendering options to be applied to all subsequent text and glyph drawing operations.

void SetTextRenderingParams(IDWriteRenderingParams* textRenderingParams = NULL);

Parameters

textRenderingParams
The text rendering options to be applied to all subsequent text and glyph drawing operations; NULL to clear current text rendering options.

CRenderTarget::SetTransform

Applies the specified transform to the render target, replacing the existing transformation. All subsequent drawing operations occur in the transformed space.

void SetTransform(const D2D1_MATRIX_3X2_F* transform);  
void SetTransform(const D2D1_MATRIX_3X2_F& transform);

Parameters

transform
The transform to apply to the render target.

CRenderTarget::VerifyResource

Verifies CD2DResource object validity; creates the object if it didn't already exist.

BOOL VerifyResource(CD2DResource* pResource);

Parameters

pResource
Pointer to CD2DResource object.

Return Value

TRUE is object if valid; otherwise FALSE.

Compartilhar via

CRenderTarget Class

Syntax

Members

Public Constructors

Public Methods

Protected Methods

Public Operators

Protected Data Members

Inheritance Hierarchy

Requirements

CRenderTarget::~CRenderTarget

CRenderTarget::Attach

Parameters

CRenderTarget::BeginDraw

CRenderTarget::Clear

Parameters

CRenderTarget::COLORREF_TO_D2DCOLOR

Parameters

Return Value

CRenderTarget::CreateCompatibleRenderTarget

Parameters

Return Value

CRenderTarget::CRenderTarget

CRenderTarget::Destroy

Parameters

Return Value

CRenderTarget::Detach

Return Value

CRenderTarget::DrawBitmap

Parameters

CRenderTarget::DrawEllipse

Parameters

CRenderTarget::DrawGeometry

Parameters

CRenderTarget::DrawGlyphRun

Parameters

CRenderTarget::DrawLine

Parameters

CRenderTarget::DrawRectangle

Parameters

CRenderTarget::DrawRoundedRectangle

Parameters

CRenderTarget::DrawText

Parameters

CRenderTarget::DrawTextLayout

Parameters

CRenderTarget::EndDraw

Return Value

CRenderTarget::FillEllipse

Parameters

CRenderTarget::FillGeometry

Parameters

CRenderTarget::FillMesh

Parameters

CRenderTarget::FillOpacityMask

Parameters

CRenderTarget::FillRectangle

Parameters

CRenderTarget::FillRoundedRectangle

Parameters

CRenderTarget::Flush

Parameters

CRenderTarget::GetAntialiasMode

Return Value

CRenderTarget::GetDpi

Return Value

CRenderTarget::GetMaximumBitmapSize

Return Value

CRenderTarget::GetPixelFormat

Return Value

CRenderTarget::GetPixelSize

Return Value

CRenderTarget::GetRenderTarget

Return Value

CRenderTarget::GetSize

Return Value

CRenderTarget::GetTags

Parameters

CRenderTarget::GetTextAntialiasMode