Vcl.Imaging.GIFImg

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Contains members that you use when incorporating GIF images in a VCL application.

Package	vclimg.bpl

Classes

GIFException	Used to raise exceptions when handling GIF image files.
TColorLookup	Represents the base class of all color mapping classes.
TColorLookupClass	TColorLookupClass is a class of TColorLookup.
TCustomGIFRenderer	Represents the base class for the GIF rendering classes.
TFastColorLookup	Represents the class for fast color mapping.
TGIFAppExtensionClass	TGIFAppExtensionClass is a class of TGIFApplicationExtension.
TGIFAppExtNSLoop	Represents the class that stores information about applications that use animated GIF images.
TGIFApplicationExtension	Represents the base class for classes containing information about applications that use GIF images.
TGIFBlock	Implements stream operations for GIF image blocks.
TGIFColorMap	Implements the manipulation of the global color map of a GIF image file.
TGIFCommentExtension	Contains textual information about the GIF image.
TGIFExtension	TGIFExtension is the base class for classes that contain information about parameters used when processing a GIF object.
TGIFExtensionClass	TGIFExtensionClass is a class of TGIFExtension.
TGIFExtensionList	TGIFExtensionList contains an array of TGIFExtension objects.
TGIFFrame	TGIFFrame represents a frame in a GIF animation.
TGIFGraphicControlExtension	Contains information used when processing a graphic rendering block.
TGIFHeader	Identifies the GIF data stream in context.
TGIFImage	TGIFImage contains a GIF (Graphics Interchange Format) image.
TGIFImageList	TGIFImageList contains an array of TGIFFrame objects.
TGIFItem	Represents the base class for all the classes that implement sections of data in the GIF image file.
TGIFList	Implements the handling of a list of TGIFItem objects.
TGIFRenderer	TGIFRenderer is used for GIF rendering.
TGIFTextExtension	Contains information about rendering textual data as a graphic.
TGIFTrailer	Indicates the end of the GIF data stream.
TGIFUnknownAppExtension	Implements a list of TGIFBlock objects.
TGrayScaleLookup	Represents the class for color mapping to a uniform 256 shade palette.
TGrayWindowsLookup	Represents the class for color mapping to a four shade palette.
TMonochromeLookup	Represents the class for color mapping to a black-and-white palette.
TNetscapeColorLookup	Represents the class for color mapping to the Netscape color cube.
TSlowColorLookup	Represents the class for slow color mapping.

Routines

CreateOptimizedPaletteFromManyBitmaps	Performs color quantization on several bitmaps.
InternalGetDIB	Converts a bitmap to a DIB of a specified pixel format.
InternalGetDIBSizes	Calculates the buffer sizes nescessary for converting a bitmap into a DIB of a specified pixel format.
ReduceColors	Maps colors in a TBitmap to their nearest representation in a palette.
Register	Adds design-time support of GIFs to TImage.
WebPalette	Creates a 216 color uniform nondithering Netscape palette.

Types

BGRArray	BGRArray is an array of TRGBTriple elements.
PalArray	PalArray is an array of TPaletteEntry elements.
PBGRArray	PBGRArray is a pointer to a BGRArray.
PInverseLookup	PInverseLookup is a pointer to a TInverseLookup.
PPalArray	PPalArray is a pointer to a PalArray.
PRGBQuadArray	PRGBQuadArray is a pointer to a TRGBQuadArray.
TColorMap	TColorMap is an array of TGIFColor.
TColormapHistogram	TColormapHistogram is used internally in the TGIFColorMap class.
TColormapReverse	TColormapReverse is used internally in the TGIFColorMap class.
TColorReduction	Specifies the available color reduction methods.
TDisposalMethod	Specifies the disposal methods used when rendering GIF frames.
TDitherMode	Specifies the available dithering algorithms.
TGIFAnimationLoop	Specifies the animation loop behavior.
TGIFApplicationRec	TGIFApplicationRec is used to store information about the application that contains the GIF image.
TGIFAuthenticationCode	TGIFAuthenticationCode represents a code used to authenticate the application identifier.
TGIFColor	A variable of type TGIFColor contains the representation of a color in RGB color model.
TGIFDithering	Specifies the dithering behavior when using the Netscape 216 color palette.
TGIFExtensionType	TGIFExtensionType is a numerical value that uniquely identifies the type of an extension.
TGIFGCERec	TGIFGCERec is used to store information about the graphic control extension.
TGIFIdentifierCode	TGIFIdentifierCode represents a code used to identify the application owning the application extension.
TGIFOptimizeOption	Specifies the optimization options used in the Optimize method.
TGIFOptimizeOptions	TGIFOptimizeOptions is a set of TGIFOptimizeOption.
TGIFPlainTextExtensionRec	TGIFPlainTextExtensionRec is used to store information about the parameters necessary to render textual data as a graphic.
TGIFSeverity	Specifies the severity level of the warnings generated when working with GIF images.
TGIFVersion	Specifies the possible versions of a GIF image.
TGIFVersionRec	TGIFVersionRec is the type of elements that specify the version of a GIF.
TGIFWarning	TGIFWarning is the type of a warning event handler.
TImageDescriptor	A variable of TImageDescriptor type contains information about an image.
TInverseLookup	TInverseLookup is used internally in the TFastColorLookup class.
TLogicalScreenDescriptor	A variable of type TLogicalScreenDescriptor contains information about the screen.
TRGBQuadArray	TRGBQuadArray is an array of records that stores the colors in RGB model.
TUsageCount	A variable of type TUsageCount contains histogram information about a GIF.

Variables

BitmapAllocationThreshold	Specifies the bitmap pixel count limit at which a newly allocated bitmap is converted before being resized.
CF_GIF	Represents a GIF clipboard format identifier.
DoAutoDither	Enables or disables auto-dithering in your application.
GIFClearOnLoop	Specifies whether the canvas should be cleared when a GIF animation loops.
GIFDefaultDelay	Specifies the default GIF animation delay.
GIFDefaultTransparentColor	Specifies the color used for transparency.
GIFDelayExp	Specifies the factor by which to multiply the delay variables in order to obtain the effective GIF animation delay time.
GIFFileBufferSize	Specifies the size of the read-ahead buffer for GIF decompression.
GIFImageDefaultAnimate	Specifies the default value for the Animate property of a newly created TGIFImage object.
GIFImageDefaultAnimationLoop	Specifies the default value for the AnimateLoop property of a newly created TGIFImage object.
GIFImageDefaultAnimationSpeed	Specifies the default value for the AnimationSpeed property of a newly created TGIFImage object.
GIFImageDefaultColorReduction	Specifies the default value for the ColorReduction property of a newly created TGIFImage object.
GIFImageDefaultColorReductionBits	Specifies the default value for the ReductionBits property of a newly created TGIFImage object.
GIFImageDefaultDithering	Specifies the default value for the Dithering property of a newly created TGIFImage object.
GIFImageDefaultDitherMode	Specifies the default value for the DitherMode property of a newly created TGIFImage object.
GIFImageDefaultTransparent	Specifies the default value for the Transparent property of a newly created TGIFImage object.
GIFImageOptimizeOnStream	Specifies whether to optimize the GIF before it is streamed to the DFM file.
GIFImageRenderOnLoad	Specifies whether to render the GIF frames as they are loaded, instead of rendering them on demand.
GIFMaximumDelay	Specifies the maximum delay when the painter is running in the main thread.
GIFMinimumDelay	Specifies the minimum delay when the painter is running in the main thread.
GIFVersions	Contains the possible versions of the GIF format handled by this namespace.
PaletteDevice	Specifies whether the desktop DC supports 256 colors or less.
TGenericColorMapper	Specifies the color mapper to use when displaying GIF images.

Constants

GIFMaxColors	GIFMaxColors: Integer = $100;
GIFVersion	GIFVersion: Integer = $300;
GIFVersionMajor	GIFVersionMajor: Integer = 3;
GIFVersionMinor	GIFVersionMinor: Integer = 0;
GIFVersionRelease	GIFVersionRelease: Integer = 7;