Class TBGRAAnimatedGif

Description

Hierarchy

Fields

Methods

Properties

Unit

BGRAAnimatedGif

Declaration

type TBGRAAnimatedGif = class(TGraphic)

Description

Class to read/write animated GIF, supports animated PNG as well when specified

Hierarchy

TGraphic
TBGRAAnimatedGif

Overview

Fields

	`BackgroundMode: TGifBackgroundMode;`
	`EraseColor: TColor;`
	`FDestroying: boolean;`
	`FImages: TGifSubImageArray;`
	`LoopCount: Word;`
	`LoopDone: Integer;`

Methods

	`constructor Create; overload; override;`
	`constructor Create(stream: TStream; AMaxImageCount: integer); overload;`
	`constructor Create(stream: TStream); overload;`
	`constructor Create(filenameUTF8: string); overload;`
	`destructor Destroy; override;`
	`function AddFrame(AImage: TFPCustomImage; X,Y: integer; ADelayMs: integer; ADisposeMode: TDisposeMode = dmErase; AHasLocalPalette: boolean = false; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false) : integer;`
	`function AddFullFrame(AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false): integer;`
	`function Duplicate: TBGRAAnimatedGif;`
	`class function GetFileExtensions: string; override;`
	`function MakeBitmapCopy(ABackground: TColor = clNone): TBitmap;`
	`function GetEmpty: boolean; override;`
	`function GetHeight: integer; override;`
	`function GetTransparent: boolean; override;`
	`function GetWidth: integer; override;`
	`procedure Assign(ASource: TPersistent); override;`
	`procedure Clear; override;`
	`procedure DeleteFrame(AIndex: integer; AEnsureNextFrameDoesNotChange: boolean);`
	`procedure Hide(Canvas: TCanvas; ARect: TRect); overload;`
	`procedure InsertFrame(AIndex: integer; AImage: TFPCustomImage; X,Y: integer; ADelayMs: integer; ADisposeMode: TDisposeMode = dmErase; AHasLocalPalette: boolean = false; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
	`procedure InsertFullFrame(AIndex: integer; AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
	`procedure LoadFromFile(const AFilenameUTF8: string); override;`
	`procedure LoadFromResource(AFilename: string);`
	`procedure LoadFromStream(Stream: TStream; AMaxImageCount: integer); overload;`
	`procedure LoadFromStream(Stream: TStream); overload; override;`
	`procedure OptimizeFrames;`
	`procedure Pause;`
	`procedure ReplaceFullFrame(AIndex: integer; AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
	`procedure Resume;`
	`procedure SaveToFile(const AFilenameUTF8: string); override;`
	`procedure SaveToStream(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm; AFormat: TBGRAImageFormat = ifGif); overload; virtual;`
	`procedure SaveToStream(Stream: TStream; AFormat: TBGRAImageFormat); overload;`
	`procedure SaveToStream(Stream: TStream); override; overload;`
	`procedure SetSize(AWidth,AHeight: integer); virtual;`
	`procedure Show(Canvas: TCanvas; ARect: TRect); overload;`
	`procedure Update(Canvas: TCanvas; ARect: TRect); overload;`
	`procedure AssignImage(AImage: TFPCustomImage; AOwned: boolean);`
	`procedure AssignTo(Dest: TPersistent); override;`
	`procedure Changed(Sender: TObject); override;`
	`procedure CheckAnyFrame;`
	`procedure CheckSavable(AFormat: TBGRAImageFormat);`
	`procedure ClearViewer; virtual;`
	`procedure Draw(ACanvas: TCanvas; const Rect: TRect); override;`
	`procedure EnsureNextFrameRec(AIndex: integer);`
	`procedure LoadFromStreamAsGif(Stream: TStream; AMaxImageCount: integer);`
	`procedure LoadFromStreamAsPng(Stream: TStream; AMaxImageCount: integer);`
	`procedure LoadFromStreamAsStatic(Stream: TStream);`
	`procedure SaveToStreamAsGif(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm); overload; virtual;`
	`procedure SaveToStreamAsPng(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm); overload; virtual;`
	`procedure SaveToStreamAsPng(Stream: TStream);`
	`procedure SetHeight(Value: integer); override;`
	`procedure SetTransparent(Value: boolean); override;`
	`procedure SetWidth(Value: integer); override;`

Properties

	`property AspectRatio: single read FAspectRatio write SetAspectRatio;`
	`property AverageDelayMs: integer read GetAverageDelayMs;`
	`property BackgroundColor: TColor Read FBackgroundColor write SetBackgroundColor;`
	`property Bitmap: TBitmap Read GetBitmap;`
	`property Count: integer Read GetCount;`
	`property CurrentImage: integer Read FCurrentImage Write SetCurrentImage;`
	`property FrameDelayMs[AIndex: integer]: integer read GetFrameDelayMs write SetFrameDelayMs;`
	`property FrameDisposeMode[AIndex: integer]: TDisposeMode read GetFrameDisposeMode write SetFrameDisposeMode;`
	`property FrameDrawMode[AIndex: integer]: TDrawMode read GetFrameDrawMode write SetFrameDrawMode;`
	`property FrameHasLocalPalette[AIndex: integer]: boolean read GetFrameHasLocalPalette write SetFrameHasLocalPalette;`
	`property FrameImage[AIndex: integer]: TBGRABitmap read GetFrameImage write SetFrameImage;`
	`property FrameImagePos[AIndex: integer]: TPoint read GetFrameImagePos write SetFrameImagePos;`
	`property Height: integer Read FHeight;`
	`property MemBitmap: TBGRABitmap Read GetMemBitmap;`
	`property Paused: boolean Read FPaused;`
	`property TimeUntilNextImageMs: integer read GetTimeUntilNextImage;`
	`property TotalAnimationTimeMs: Int64 read FTotalAnimationTime;`
	`property Width: integer Read FWidth;`

Description

Fields

	`BackgroundMode: TGifBackgroundMode;`
This item has no description.

	`EraseColor: TColor;`
This item has no description.

	`FDestroying: boolean;`
This item has no description.

	`FImages: TGifSubImageArray;`
This item has no description.

	`LoopCount: Word;`
This item has no description.

	`LoopDone: Integer;`
This item has no description.

Methods

constructor Create; overload; override;

This item has no description. Showing description inherited from TGraphic.Create.

Create an empty instance

	`constructor Create(stream: TStream; AMaxImageCount: integer); overload;`
This item has no description.

	`constructor Create(stream: TStream); overload;`
This item has no description.

	`constructor Create(filenameUTF8: string); overload;`
This item has no description.

	`destructor Destroy; override;`
This item has no description.

	`function AddFrame(AImage: TFPCustomImage; X,Y: integer; ADelayMs: integer; ADisposeMode: TDisposeMode = dmErase; AHasLocalPalette: boolean = false; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false) : integer;`
This item has no description.

	`function AddFullFrame(AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false): integer;`
Add a frame that replaces completely the previous one

	`function Duplicate: TBGRAAnimatedGif;`
This item has no description.

class function GetFileExtensions: string; override;

This item has no description. Showing description inherited from TGraphic.GetFileExtensions.

Returns the list of possible file extensions

	`function MakeBitmapCopy(ABackground: TColor = clNone): TBitmap;`
This item has no description.

function GetEmpty: boolean; override;

This item has no description. Showing description inherited from TGraphic.GetEmpty.

Check whether it is empty

function GetHeight: integer; override;

This item has no description. Showing description inherited from TGraphic.GetHeight.

Retrieves height

function GetTransparent: boolean; override;

This item has no description. Showing description inherited from TGraphic.GetTransparent.

Retrieves whether transparent

function GetWidth: integer; override;

This item has no description. Showing description inherited from TGraphic.GetWidth.

Retrieves width

	`procedure Assign(ASource: TPersistent); override;`
This item has no description.

procedure Clear; override;

This item has no description. Showing description inherited from TGraphic.Clear.

Clears the content

	`procedure DeleteFrame(AIndex: integer; AEnsureNextFrameDoesNotChange: boolean);`
This item has no description.

	`procedure Hide(Canvas: TCanvas; ARect: TRect); overload;`
This item has no description.

	`procedure InsertFrame(AIndex: integer; AImage: TFPCustomImage; X,Y: integer; ADelayMs: integer; ADisposeMode: TDisposeMode = dmErase; AHasLocalPalette: boolean = false; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
This item has no description.

	`procedure InsertFullFrame(AIndex: integer; AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
Insert at the specified AIndex a frame that replaces completely the previous one

procedure LoadFromFile(const AFilenameUTF8: string); override;

This item has no description. Showing description inherited from TGraphic.LoadFromFile.

Load the content from a given file

	`procedure LoadFromResource(AFilename: string);`
This item has no description.

	`procedure LoadFromStream(Stream: TStream; AMaxImageCount: integer); overload;`
This item has no description.

	`procedure LoadFromStream(Stream: TStream); overload; override;`
TGraphic

	`procedure OptimizeFrames;`
This item has no description.

	`procedure Pause;`
This item has no description.

	`procedure ReplaceFullFrame(AIndex: integer; AImage: TFPCustomImage; ADelayMs: integer; AHasLocalPalette: boolean = true; ADrawMode: TDrawMode = dmSetExceptTransparent; AOwned: boolean = false);`
This item has no description.

	`procedure Resume;`
This item has no description.

procedure SaveToFile(const AFilenameUTF8: string); override;

This item has no description. Showing description inherited from TGraphic.SaveToFile.

Saves the content to a file

	`procedure SaveToStream(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm; AFormat: TBGRAImageFormat = ifGif); overload; virtual;`
This item has no description.

procedure SaveToStream(Stream: TStream; AFormat: TBGRAImageFormat); overload;

There are some differences in the dispose modes and draw modes so some files cannot be directly saved from one format to the other:

dispose mode dmErase is only in GIF and dispose mode dmEraseArea is only in PNG,
draw mode in GIF is only dmSetExceptTransparent and draw mode in PNG is dmSet or dmDrawWithTransparency.

PNG format is not limited to 256 colors, so there is no need for quantization even if it possible. When PNG has a palette, it applies to all frames, whereas for GIF, there can be a palette for each frame.

	`procedure SaveToStream(Stream: TStream); override; overload;`
Save to a stream using GIF format

	`procedure SetSize(AWidth,AHeight: integer); virtual;`
This item has no description.

	`procedure Show(Canvas: TCanvas; ARect: TRect); overload;`
This item has no description.

	`procedure Update(Canvas: TCanvas; ARect: TRect); overload;`
This item has no description.

	`procedure AssignImage(AImage: TFPCustomImage; AOwned: boolean);`
This item has no description.

	`procedure AssignTo(Dest: TPersistent); override;`
This item has no description.

procedure Changed(Sender: TObject); override;

This item has no description. Showing description inherited from TGraphic.Changed.

Notify a change

	`procedure CheckAnyFrame;`
This item has no description.

	`procedure CheckSavable(AFormat: TBGRAImageFormat);`
This item has no description.

	`procedure ClearViewer; virtual;`
This item has no description.

	`procedure Draw(ACanvas: TCanvas; const Rect: TRect); override;`
TGraphic

	`procedure EnsureNextFrameRec(AIndex: integer);`
This item has no description.

	`procedure LoadFromStreamAsGif(Stream: TStream; AMaxImageCount: integer);`
This item has no description.

	`procedure LoadFromStreamAsPng(Stream: TStream; AMaxImageCount: integer);`
This item has no description.

	`procedure LoadFromStreamAsStatic(Stream: TStream);`
This item has no description.

	`procedure SaveToStreamAsGif(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm); overload; virtual;`
This item has no description.

	`procedure SaveToStreamAsPng(Stream: TStream; AQuantizer: TBGRAColorQuantizerAny; ADitheringAlgorithm: TDitheringAlgorithm); overload; virtual;`
This item has no description.

	`procedure SaveToStreamAsPng(Stream: TStream);`
This item has no description.

procedure SetHeight(Value: integer); override;

This item has no description. Showing description inherited from TGraphic.SetHeight.

Sets the height

procedure SetTransparent(Value: boolean); override;

This item has no description. Showing description inherited from TGraphic.SetTransparent.

Sets whether to render as transparent

procedure SetWidth(Value: integer); override;

This item has no description. Showing description inherited from TGraphic.SetWidth.

Sets the widith

Properties

	`property AspectRatio: single read FAspectRatio write SetAspectRatio;`
linear blend only in PNG

	`property AverageDelayMs: integer read GetAverageDelayMs;`
This item has no description.

	`property BackgroundColor: TColor Read FBackgroundColor write SetBackgroundColor;`
This item has no description.

	`property Bitmap: TBitmap Read GetBitmap;`
This item has no description.

	`property Count: integer Read GetCount;`
This item has no description.

	`property CurrentImage: integer Read FCurrentImage Write SetCurrentImage;`
This item has no description.

	`property FrameDelayMs[AIndex: integer]: integer read GetFrameDelayMs write SetFrameDelayMs;`
This item has no description.

	`property FrameDisposeMode[AIndex: integer]: TDisposeMode read GetFrameDisposeMode write SetFrameDisposeMode;`
This item has no description.

	`property FrameDrawMode[AIndex: integer]: TDrawMode read GetFrameDrawMode write SetFrameDrawMode;`
This item has no description.

	`property FrameHasLocalPalette[AIndex: integer]: boolean read GetFrameHasLocalPalette write SetFrameHasLocalPalette;`
This item has no description.

	`property FrameImage[AIndex: integer]: TBGRABitmap read GetFrameImage write SetFrameImage;`
This item has no description.

	`property FrameImagePos[AIndex: integer]: TPoint read GetFrameImagePos write SetFrameImagePos;`
This item has no description.

	`property Height: integer Read FHeight;`
This item has no description.

	`property MemBitmap: TBGRABitmap Read GetMemBitmap;`
This item has no description.

	`property Paused: boolean Read FPaused;`
This item has no description.

	`property TimeUntilNextImageMs: integer read GetTimeUntilNextImage;`
This item has no description.

	`property TotalAnimationTimeMs: Int64 read FTotalAnimationTime;`
This item has no description.

	`property Width: integer Read FWidth;`
This item has no description.

BGRABitmap

Class TBGRAAnimatedGif

Unit

Declaration

Description

Hierarchy

Overview

Fields

Methods

Properties

Description

Fields

Methods

Properties