dw::core::ImgRenderer Class Reference

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#include <imgrenderer.hh>

Public Member Functions
virtual	~ImgRenderer ()
virtual void	setBuffer (core::Imgbuf *buffer, bool resize=false)=0
	Called, when an image buffer is attached.
virtual void	drawRow (int row)=0
	Called, when data from a row is available and has been copied into the image buffer.
virtual void	finish ()=0
	Called, when all image data has been retrieved.
virtual void	fatal ()=0
	Called, when there are problems with the retrieval of image data.

Detailed Description

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See also

Images and Backgrounds in Dw

Definition at line 16 of file imgrenderer.hh.

Constructor & Destructor Documentation

~ImgRenderer()

virtual dw::core::ImgRenderer::~ImgRenderer ( )

inlinevirtual

Definition at line 19 of file imgrenderer.hh.

Member Function Documentation

drawRow()

virtual void dw::core::ImgRenderer::drawRow ( int  row )

pure virtual

Called, when data from a row is available and has been copied into the image buffer.

The implementation will typically queue the respective area for drawing.

Implemented in dw::Image, dw::core::ImgRendererDist, dw::core::style::StyleImage::StyleImgRenderer, and dw::core::style::StyleImage::ExternalImgRenderer.

Referenced by imageDrawTimeout().

fatal()

virtual void dw::core::ImgRenderer::fatal ( )

pure virtual

Called, when there are problems with the retrieval of image data.

The implementation may use this to indicate an error.

Implemented in dw::Image, dw::core::ImgRendererDist, dw::core::style::StyleImage::StyleImgRenderer, and dw::core::style::StyleImage::ExternalImgRenderer.

finish()

virtual void dw::core::ImgRenderer::finish ( )

pure virtual

Called, when all image data has been retrieved.

The implementation may use this instead of "drawRow" for drawing, to limit the number of draws.

Implemented in dw::Image, dw::core::ImgRendererDist, dw::core::style::StyleImage::StyleImgRenderer, and dw::core::style::StyleImage::ExternalImgRenderer.

setBuffer()

virtual void dw::core::ImgRenderer::setBuffer ( core::Imgbuf *  buffer, bool  resize = false  )

pure virtual

Called, when an image buffer is attached.

This is typically the case when all meta data (size, depth) has been read.

Implemented in dw::core::ImgRendererDist, dw::core::style::StyleImage::StyleImgRenderer, dw::core::style::StyleImage::ExternalImgRenderer, and dw::Image.

Referenced by imageInitTimeout().

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The documentation for this class was generated from the following file:

• dw/imgrenderer.hh