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FX::FXImage Class Reference

An Image is a rectangular array of pixels. More...

#include <FXImage.h>

Inheritance diagram for FX::FXImage:


Public Member Functions
	FXImage (FXApp a, const FXColor pix=NULL, FXuint opts=0, FXint w=1, FXint h=1)
FXColor *	getData () const
FXuint	getOptions () const
void	setOptions (FXuint opts)
FXColor	getPixel (FXint x, FXint y) const
void	setPixel (FXint x, FXint y, FXColor color)
FXbool	hasAlpha () const
virtual void	create ()
virtual void	detach ()
virtual void	destroy ()
virtual void	restore ()
virtual void	render ()
virtual void	release ()
virtual void	resize (FXint w, FXint h)
virtual void	scale (FXint w, FXint h, FXint quality=0)
virtual void	mirror (FXbool horizontal, FXbool vertical)
virtual void	rotate (FXint degrees)
virtual void	crop (FXint x, FXint y, FXint w, FXint h)
virtual void	fill (FXColor color)
virtual void	fade (FXColor color, FXint factor=255)
virtual void	xshear (FXint shear, FXColor clr=0)
virtual void	yshear (FXint shear, FXColor clr=0)
virtual void	hgradient (FXColor left, FXColor right)
virtual void	vgradient (FXColor top, FXColor bottom)
virtual void	gradient (FXColor topleft, FXColor topright, FXColor bottomleft, FXColor bottomright)
virtual void	blend (FXColor color)
virtual void	save (FXStream &store) const
virtual void	load (FXStream &store)
virtual FXbool	savePixels (FXStream &store) const
virtual FXbool	loadPixels (FXStream &store)
virtual	~FXImage ()

Detailed Description

An Image is a rectangular array of pixels.

It supports two representations of these pixels: a client-side pixel buffer which is stored as an array of FXColor, and a server-side pixmap which is stored in an organization directly compatible with the screen, for fast drawing onto the device. The server-side representation is not directly accessible from the current process as it lives in the process of the X Server or GDI.

Constructor & Destructor Documentation

FX::FXImage::FXImage ( FXApp * a,

const FXColor * pix = NULL,

FXuint opts = 0,

FXint w = 1,

FXint h = 1

)

Create an image.
If a client-side pixel buffer has been specified, the image does not own the pixel buffer unless the IMAGE_OWNED flag is set. If the IMAGE_OWNED flag is set but a NULL pixel buffer is passed, a pixel buffer will be automatically created and will be owned by the image. The flags IMAGE_SHMI and IMAGE_SHMP may be specified for large images to instruct render() to use shared memory to communicate with the server.

virtual FX::FXImage::~FXImage ( ) [virtual]

Destructor.

Member Function Documentation

FXColor* FX::FXImage::getData ( ) const [inline]

To get to the pixel data.

FXuint FX::FXImage::getOptions ( ) const [inline]

To get to the option flags.

void FX::FXImage::setOptions ( FXuint opts )

Change options.

FXColor FX::FXImage::getPixel ( FXint x,

FXint y

) const [inline]

Get pixel at x,y.

void FX::FXImage::setPixel ( FXint x,

FXint y,

FXColor color

) [inline]

Change pixel at x,y.

FXbool FX::FXImage::hasAlpha ( ) const

Scan the image and return FALSE if fully opaque.

virtual void FX::FXImage::create ( ) [virtual]

Create the server side pixmap, then call render() to fill it with the pixel data from the client-side buffer.
After the server-side image has been created, the client-side pixel buffer will be deleted unless IMAGE_KEEP has been specified. If the pixel buffer is not owned, i.e. the flag IMAGE_OWNED is not set, the pixel buffer will not be deleted.
Reimplemented from FX::FXId.
Reimplemented in FX::FXIcon.

virtual void FX::FXImage::detach ( ) [virtual]

Detach the server side pixmap from the Image.
Afterwards, the Image is left as if it never had a server-side resources.
Reimplemented from FX::FXId.
Reimplemented in FX::FXIcon.

virtual void FX::FXImage::destroy ( ) [virtual]

Destroy the server-side pixmap.
The client-side pixel buffer is not affected.
Reimplemented from FX::FXId.
Reimplemented in FX::FXIcon.

virtual void FX::FXImage::restore ( ) [virtual]

Retrieves pixels from the server-side image.
For example, to make screen snapshots, or to retrieve an image after it has been drawin into by various means.

virtual void FX::FXImage::render ( ) [virtual]

Render the server-side representation of the image from client-side pixels.
Normally, IMAGE_DITHER is used which causes the server-side representation to be rendered using a 16x16 ordered dither if necessary; however if IMAGE_NEAREST is used a faster (but uglier-looking), nearest neighbor algorithm is used.
Reimplemented in FX::FXIcon.

virtual void FX::FXImage::release ( ) [virtual]

Release the client-side pixels buffer, free it if it was owned.
If it is not owned, the image just forgets about the buffer.

virtual void FX::FXImage::resize ( FXint w,

FXint h

) [virtual]

Resize both client-side and server-side representations (if any) to the given width and height.
The new representations typically contain garbage after this operation and need to be re-filled.
Reimplemented from FX::FXDrawable.
Reimplemented in FX::FXIcon.

virtual void FX::FXImage::scale ( FXint w,

FXint h,

FXint quality = 0

) [virtual]

Rescale pixels image to the specified width and height; this calls resize() to adjust the client and server side representations.

virtual void FX::FXImage::mirror ( FXbool horizontal,

FXbool vertical

) [virtual]

Mirror image horizontally and/or vertically.

virtual void FX::FXImage::rotate ( FXint degrees ) [virtual]

Rotate image by degrees ccw; this calls resize() to adjust the client and server side representations if necessary.

virtual void FX::FXImage::crop ( FXint x,

FXint y,

FXint w,

FXint h

) [virtual]

Crop image to given rectangle; this calls resize() to adjust the client and server side representations.

virtual void FX::FXImage::fill ( FXColor color ) [virtual]

Fill image with uniform color.

virtual void FX::FXImage::fade ( FXColor color,

FXint factor = 255

) [virtual]

Fade image to uniform color.

virtual void FX::FXImage::xshear ( FXint shear,

FXColor clr = 0

) [virtual]

Shear image horizontally; the number of pixels is equal to the shear parameter times 256.
The area outside the image is filled with transparent black, unless another color is specified.

virtual void FX::FXImage::yshear ( FXint shear,

FXColor clr = 0

) [virtual]

Shear image vertically; the number of pixels is equal to the shear parameter times 256.
The area outside the image is filled with transparent black, unless another color is specified.

virtual void FX::FXImage::hgradient ( FXColor left,

FXColor right

) [virtual]

Fill horizontal gradient.

virtual void FX::FXImage::vgradient ( FXColor top,

FXColor bottom

) [virtual]

Fill vertical gradient.

virtual void FX::FXImage::gradient ( FXColor topleft,

FXColor topright,

FXColor bottomleft,

FXColor bottomright

) [virtual]

Fill with gradient.

virtual void FX::FXImage::blend ( FXColor color ) [virtual]

Blend image over uniform color.

virtual void FX::FXImage::save ( FXStream & store ) const [virtual]

Save object to stream.

Reimplemented from FX::FXDrawable.

virtual void FX::FXImage::load ( FXStream & store ) [virtual]

Load object from stream.

Reimplemented from FX::FXDrawable.

virtual FXbool FX::FXImage::savePixels ( FXStream & store ) const [virtual]

Save pixel data only.

Reimplemented in FX::FXBMPIcon, FX::FXBMPImage, FX::FXGIFIcon, FX::FXGIFImage, FX::FXICOIcon, FX::FXICOImage, FX::FXJPGIcon, FX::FXJPGImage, FX::FXPCXIcon, FX::FXPCXImage, FX::FXPNGIcon, FX::FXPNGImage, FX::FXPPMIcon, FX::FXPPMImage, FX::FXRGBIcon, FX::FXRGBImage, FX::FXTGAIcon, FX::FXTGAImage, FX::FXTIFIcon, FX::FXTIFImage, FX::FXXBMIcon, FX::FXXBMImage, FX::FXXPMIcon, and FX::FXXPMImage.

virtual FXbool FX::FXImage::loadPixels ( FXStream & store ) [virtual]

Load pixel data only.

Reimplemented in FX::FXBMPIcon, FX::FXBMPImage, FX::FXGIFIcon, FX::FXGIFImage, FX::FXICOIcon, FX::FXICOImage, FX::FXJPGIcon, FX::FXJPGImage, FX::FXPCXIcon, FX::FXPCXImage, FX::FXPNGIcon, FX::FXPNGImage, FX::FXPPMIcon, FX::FXPPMImage, FX::FXRGBIcon, FX::FXRGBImage, FX::FXTGAIcon, FX::FXTGAImage, FX::FXTIFIcon, FX::FXTIFImage, FX::FXXBMIcon, FX::FXXBMImage, FX::FXXPMIcon, and FX::FXXPMImage.

FX::FXImage Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation