问题
How can I use animated GIF in Firemonky. I can load the gif using Timage but it's not animating. I am using Delphi 10.2 tokyo.
回答1:
Use TBitmapListAnimation.
- Place TImage on Form
- Place TBitmapListAnimation into TImage like on screenshot:
- Set properties in TBitmapListAnimation
AnimationBitmap - You can use online convertorsm that split gif into frames.
http://ezgif.com/split
http://www.photojoiner.net/merge-photos/editor/#
Set another properties: AnimationCount = 8, AnimationRowCount = 1, Enabled = True Duration in seconds, PropertyName = Bitmap.
Please vote if you like this answer.
P.s. How to create an animation bitmap from a list of images to use in TBitmapListAnimation? Download this app, here is also a topic.
回答2:
Maybe a bit late, but found a simple solution on this page : http://www.raysoftware.cn/?p=559 Download the file http://www.raysoftware.cn/wp-content/uploads/2016/12/FMXGif.rar, uncompress, and take the file FMX.GifUtils out, and put in your the directory of your application
Put a image component on your form with name Image1
Put the file FMX.GifUtils in your use on top
Declare in your form in private :
FGifPlayer: TGifPlayer;
in the create of your form:
FGifPlayer := TGifPlayer.Create(Self);
FGifPlayer.Image := Image1;
FGifPlayer.LoadFromFile('youfilename.gif');
FGifPlayer.Play;
That's it;
回答3:
Here is another one solution. Unit from previous answer http://www.raysoftware.cn, but with fixed bugs
unit FMX.GifUtils;
interface
uses
System.Classes, System.SysUtils, System.Types, System.UITypes,
FMX.Types, FMX.Objects, FMX.Graphics, System.Generics.Collections;
const
alphaTransparent = $00;
GifSignature: array [0 .. 2] of Byte = ($47, $49, $46); // GIF
VerSignature87a: array [0 .. 2] of Byte = ($38, $37, $61); // 87a
VerSignature89a: array [0 .. 2] of Byte = ($38, $39, $61); // 89a
GIF_DISPOSAL_UNSPECIFIED = 0;
GIF_DISPOSAL_LEAVE = 1;
GIF_DISPOSAL_BACKGROUND = 2;
GIF_DISPOSAL_PREVIOUS = 3;
type
TGifVer = (verUnknow, ver87a, ver89a);
TInternalColor = packed record
case Integer of
0:
(
{$IFDEF BIGENDIAN}
R, G, B, A: Byte;
{$ELSE}
B, G, R, A: Byte;
{$ENDIF}
);
1:
(Color: TAlphaColor;
);
end;
{$POINTERMATH ON}
PInternalColor = ^TInternalColor;
{$POINTERMATH OFF}
TGifRGB = packed record
R: Byte;
G: Byte;
B: Byte;
end;
TGIFHeader = packed record
Signature: array [0 .. 2] of Byte; // * Header Signature (always "GIF") */
Version: array [0 .. 2] of Byte; // * GIF format version("87a" or "89a") */
// Logical Screen Descriptor
ScreenWidth: word; // * Width of Display Screen in Pixels */
ScreenHeight: word; // * Height of Display Screen in Pixels */
Packedbit: Byte; // * Screen and Color Map Information */
BackgroundColor: Byte; // * Background Color Index */
AspectRatio: Byte; // * Pixel Aspect Ratio */
end;
TGifImageDescriptor = packed record
Left: word; // * X position of image on the display */
Top: word; // * Y position of image on the display */
Width: word; // * Width of the image in pixels */
Height: word; // * Height of the image in pixels */
Packedbit: Byte; // * Image and Color Table Data Information */
end;
TGifGraphicsControlExtension = packed record
BlockSize: Byte; // * Size of remaining fields (always 04h) */
Packedbit: Byte; // * Method of graphics disposal to use */
DelayTime: word; // * Hundredths of seconds to wait */
ColorIndex: Byte; // * Transparent Color Index */
Terminator: Byte; // * Block Terminator (always 0) */
end;
TGifReader = class;
TPalette = TArray<TInternalColor>;
TGifFrameItem = class;
TGifFrameList = TObjectList<TGifFrameItem>;
{ TGifReader }
TGifReader = class(TObject)
protected
FHeader: TGIFHeader;
FPalette: TPalette;
FScreenWidth: Integer;
FScreenHeight: Integer;
FInterlace: Boolean;
FBitsPerPixel: Byte;
FBackgroundColorIndex: Byte;
FResolution: Byte;
FGifVer: TGifVer;
public
function Read(Stream: TStream; var AFrameList: TGifFrameList): Boolean;
overload; virtual;
function Read(FileName: string; var AFrameList: TGifFrameList): Boolean;
overload; virtual;
function ReadRes(Instance: THandle; ResName: string; ResType: PChar;
var AFrameList: TGifFrameList): Boolean; overload; virtual;
function ReadRes(Instance: THandle; ResId: Integer; ResType: PChar;
var AFrameList: TGifFrameList): Boolean; overload; virtual;
function Check(Stream: TStream): Boolean; overload; virtual;
function Check(FileName: string): Boolean; overload; virtual;
public
constructor Create; virtual;
destructor Destroy; override;
property Header: TGIFHeader read FHeader;
property ScreenWidth: Integer read FScreenWidth;
property ScreenHeight: Integer read FScreenHeight;
property Interlace: Boolean read FInterlace;
property BitsPerPixel: Byte read FBitsPerPixel;
property Background: Byte read FBackgroundColorIndex;
property Resolution: Byte read FResolution;
property GifVer: TGifVer read FGifVer;
end;
TGifFrameItem = class
FDisposalMethod: Integer;
FPos: TPoint;
FTime: Integer;
FDisbitmap: TBitmap;
fBackColor : TalphaColor;
public
destructor Destroy; override;
property Bitmap : TBitmap read FDisbitmap;
end;
implementation
uses
Math;
function swap16(x: UInt16): UInt16; inline;
begin
Result := ((x and $FF) shl 8) or ((x and $FF00) shr 8);
end;
function swap32(x: UInt32): UInt32; inline;
begin
Result := ((x and $FF) shl 24) or ((x and $FF00) shl 8) or
((x and $FF0000) shr 8) or ((x and $FF000000) shr 24);
end;
function LEtoN(Value: word): word; overload;
begin
Result := swap16(Value);
end;
function LEtoN(Value: Dword): Dword; overload;
begin
Result := swap32(Value);
end;
procedure MergeBitmap(const Source, Dest: TBitmap; SrcRect: TRect;
DestX, DestY: Integer);
var
I, J, MoveBytes: Integer;
SrcData, DestData: TBitmapData;
lpColorSrc, lpColorDst: PInternalColor;
begin
With Dest do
begin
if Map(TMapAccess.Write, DestData) then
try
if Source.Map(TMapAccess.Read, SrcData) then
try
if SrcRect.Left < 0 then
begin
Dec(DestX, SrcRect.Left);
SrcRect.Left := 0;
end;
if SrcRect.Top < 0 then
begin
Dec(DestY, SrcRect.Top);
SrcRect.Top := 0;
end;
SrcRect.Right := Min(SrcRect.Right, Source.Width);
SrcRect.Bottom := Min(SrcRect.Bottom, Source.Height);
if DestX < 0 then
begin
Dec(SrcRect.Left, DestX);
DestX := 0;
end;
if DestY < 0 then
begin
Dec(SrcRect.Top, DestY);
DestY := 0;
end;
if DestX + SrcRect.Width > Width then
SrcRect.Width := Width - DestX;
if DestY + SrcRect.Height > Height then
SrcRect.Height := Height - DestY;
if (SrcRect.Left < SrcRect.Right) and (SrcRect.Top < SrcRect.Bottom)
then
begin
MoveBytes := SrcRect.Width * SrcData.BytesPerPixel;
for I := 0 to SrcRect.Height - 1 do
begin
lpColorSrc := SrcData.GetPixelAddr(SrcRect.Left,
SrcRect.Top + I);
lpColorDst := DestData.GetPixelAddr(DestX, DestY + I);
for J := 0 to SrcRect.Width - 1 do
if lpColorSrc[J].A <> 0 then
begin
lpColorDst[J] := lpColorSrc[J];
end;
end;
end;
finally
Source.Unmap(SrcData);
end;
finally
Unmap(DestData);
end;
end;
end;
{ TGifReader }
function TGifReader.Read(FileName: string;
var AFrameList: TGifFrameList): Boolean;
var
fs: TFileStream;
begin
Result := False;
fs := TFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite);
try
Result := Read(fs, AFrameList);
except
end;
fs.DisposeOf;
end;
function TGifReader.ReadRes(Instance: THandle; ResName: string; ResType: PChar;
var AFrameList: TGifFrameList): Boolean;
var
res: TResourceStream;
begin
res := TResourceStream.Create(HInstance, ResName, ResType);
Result := Read(res, AFrameList);
res.DisposeOf;
end;
function TGifReader.ReadRes(Instance: THandle; ResId: Integer; ResType: PChar;
var AFrameList: TGifFrameList): Boolean;
var
res: TResourceStream;
begin
res := TResourceStream.CreateFromID(HInstance, ResId, ResType);
Result := Read(res, AFrameList);
res.DisposeOf;
end;
function TGifReader.Read(Stream: TStream;
var AFrameList: TGifFrameList): Boolean;
var
LDescriptor: TGifImageDescriptor;
LGraphicsCtrlExt: TGifGraphicsControlExtension;
LIsTransparent: Boolean;
LGraphCtrlExt: Boolean;
LFrameWidth: Integer;
LFrameHeight: Integer;
LLocalPalette: TPalette;
LScanLineBuf: TBytes;
procedure ReadPalette(Stream: TStream; Size: Integer; var APalette: TPalette);
Var
RGBEntry: TGifRGB;
I: Integer;
c: TInternalColor;
begin
SetLength(APalette, Size);
For I := 0 To Size - 1 Do
Begin
Stream.Read(RGBEntry, SizeOf(RGBEntry));
With APalette[I] do
begin
R := RGBEntry.R or (RGBEntry.R shl 8);
G := RGBEntry.G or (RGBEntry.G shl 8);
B := RGBEntry.B or (RGBEntry.B shl 8);
A := $FF;
end;
End;
end;
function ProcHeader: Boolean;
var
c: TInternalColor;
begin
Result := False;
With FHeader do
begin
if (CompareMem(@Signature, @GifSignature, 3)) and
(CompareMem(@Version, @VerSignature87a, 3)) or
(CompareMem(@Version, @VerSignature89a, 3)) then
begin
FScreenWidth := FHeader.ScreenWidth;
FScreenHeight := FHeader.ScreenHeight;
FResolution := Packedbit and $70 shr 5 + 1;
FBitsPerPixel := Packedbit and 7 + 1;
FBackgroundColorIndex := BackgroundColor;
if CompareMem(@Version, @VerSignature87a, 3) then
FGifVer := ver87a
else if CompareMem(@Version, @VerSignature89a, 3) then
FGifVer := ver89a;
Result := True;
end
else
Raise Exception.Create('Unknown GIF image format');
end;
end;
function ProcFrame: Boolean;
var
LineSize: Integer;
LBackColorIndex: Integer;
begin
Result := False;
With LDescriptor do
begin
LFrameWidth := Width;
LFrameHeight := Height;
FInterlace := ((Packedbit and $40) = $40);
end;
if LGraphCtrlExt then
begin
LIsTransparent := (LGraphicsCtrlExt.Packedbit and $01) <> 0;
If LIsTransparent then
LBackColorIndex := LGraphicsCtrlExt.ColorIndex;
end
else
begin
LIsTransparent := FBackgroundColorIndex <> 0;
LBackColorIndex := FBackgroundColorIndex;
end;
LineSize := LFrameWidth * (LFrameHeight + 1);
SetLength(LScanLineBuf, LineSize);
If LIsTransparent then
begin
LLocalPalette[LBackColorIndex].A := alphaTransparent;
end;
Result := True;
end;
function ReadAndProcBlock(Stream: TStream): Byte;
var
Introducer, Labels, SkipByte: Byte;
begin
Stream.Read(Introducer, 1);
if Introducer = $21 then
begin
Stream.Read(Labels, 1);
Case Labels of
$FE, $FF:
// Comment Extension block or Application Extension block
while True do
begin
Stream.Read(SkipByte, 1);
if SkipByte = 0 then
Break;
Stream.Seek(Int64( SkipByte), soFromCurrent);
end;
$F9: // Graphics Control Extension block
begin
Stream.Read(LGraphicsCtrlExt, SizeOf(LGraphicsCtrlExt));
LGraphCtrlExt := True;
end;
$01: // Plain Text Extension block
begin
Stream.Read(SkipByte, 1);
Stream.Seek(Int64( SkipByte), soFromCurrent);
while True do
begin
Stream.Read(SkipByte, 1);
if SkipByte = 0 then
Break;
Stream.Seek(Int64( SkipByte), soFromCurrent);
end;
end;
end;
end;
Result := Introducer;
end;
function ReadScanLine(Stream: TStream; AScanLine: PByte): Boolean;
var
OldPos, UnpackedSize, PackedSize: longint;
I: Integer;
Data, Bits, Code: Cardinal;
SourcePtr: PByte;
InCode: Cardinal;
CodeSize: Cardinal;
CodeMask: Cardinal;
FreeCode: Cardinal;
OldCode: Cardinal;
Prefix: array [0 .. 4095] of Cardinal;
Suffix, Stack: array [0 .. 4095] of Byte;
StackPointer: PByte;
Target: PByte;
DataComp: TBytes;
B, FInitialCodeSize, FirstChar: Byte;
ClearCode, EOICode: word;
begin
DataComp := nil;
try
try
Stream.Read(FInitialCodeSize, 1);
OldPos := Stream.Position;
PackedSize := 0;
Repeat
Stream.Read(B, 1);
if B > 0 then
begin
Inc(PackedSize, B);
Stream.Seek(Int64(B), soFromCurrent);
CodeMask := (1 shl CodeSize) - 1;
end;
until B = 0;
SetLength(DataComp, 2 * PackedSize);
SourcePtr := @DataComp[0];
Stream.Position := OldPos;
Repeat
Stream.Read(B, 1);
if B > 0 then
begin
Stream.ReadBuffer(SourcePtr^, B);
Inc(SourcePtr, B);
end;
until B = 0;
SourcePtr := @DataComp[0];
Target := AScanLine;
CodeSize := FInitialCodeSize + 1;
ClearCode := 1 shl FInitialCodeSize;
EOICode := ClearCode + 1;
FreeCode := ClearCode + 2;
OldCode := 4096;
CodeMask := (1 shl CodeSize) - 1;
UnpackedSize := LFrameWidth * LFrameHeight;
for I := 0 to ClearCode - 1 do
begin
Prefix[I] := 4096;
Suffix[I] := I;
end;
StackPointer := @Stack;
FirstChar := 0;
Data := 0;
Bits := 0;
while (UnpackedSize > 0) and (PackedSize > 0) do
begin
Inc(Data, SourcePtr^ shl Bits);
Inc(Bits, 8);
while Bits >= CodeSize do
begin
Code := Data and CodeMask;
Data := Data shr CodeSize;
Dec(Bits, CodeSize);
if Code = EOICode then
Break;
if Code = ClearCode then
begin
CodeSize := FInitialCodeSize + 1;
CodeMask := (1 shl CodeSize) - 1;
FreeCode := ClearCode + 2;
OldCode := 4096;
Continue;
end;
if Code > FreeCode then
Break;
if OldCode = 4096 then
begin
FirstChar := Suffix[Code];
Target^ := FirstChar;
Inc(Target);
Dec(UnpackedSize);
OldCode := Code;
Continue;
end;
InCode := Code;
if Code = FreeCode then
begin
StackPointer^ := FirstChar;
Inc(StackPointer);
Code := OldCode;
end;
while Code > ClearCode do
begin
StackPointer^ := Suffix[Code];
Inc(StackPointer);
Code := Prefix[Code];
end;
FirstChar := Suffix[Code];
StackPointer^ := FirstChar;
Inc(StackPointer);
Prefix[FreeCode] := OldCode;
Suffix[FreeCode] := FirstChar;
if (FreeCode = CodeMask) and (CodeSize < 12) then
begin
Inc(CodeSize);
CodeMask := (1 shl CodeSize) - 1;
end;
if FreeCode < 4095 then
Inc(FreeCode);
OldCode := InCode;
repeat
Dec(StackPointer);
Target^ := StackPointer^;
Inc(Target);
Dec(UnpackedSize);
until StackPointer = @Stack;
end;
Inc(SourcePtr);
Dec(PackedSize);
end;
finally
DataComp := nil;
end;
except
end;
Result := True;
end;
function WriteScanLine(var Img: TBitmap; AScanLine: PByte): Boolean;
Var
Row, Col: Integer;
Pass, Every: Byte;
P: PByte;
function IsMultiple(NumberA, NumberB: Integer): Boolean;
begin
Result := (NumberA >= NumberB) and (NumberB > 0) and
(NumberA mod NumberB = 0);
end;
var
PLine: PInternalColor;
Data: TBitmapData;
begin
Result := False;
P := AScanLine;
if Img.Map(TMapAccess.Write, Data) then
begin
try
If FInterlace then
begin
For Pass := 1 to 4 do
begin
Case Pass of
1:
begin
Row := 0;
Every := 8;
end;
2:
begin
Row := 4;
Every := 8;
end;
3:
begin
Row := 2;
Every := 4;
end;
4:
begin
Row := 1;
Every := 2;
end;
end;
Repeat
PLine := Data.GetScanline(Row);
for Col := 0 to Img.Width - 1 do
begin
PLine[Col] := LLocalPalette[P^];
Inc(P);
end;
Inc(Row, Every);
until Row >= Img.Height;
end;
end
else
begin
for Row := 0 to Img.Height - 1 do
begin
PLine := Data.GetScanline(Row);
for Col := 0 to Img.Width - 1 do
begin
PLine[Col] := LLocalPalette[P^];
Inc(P);
end;
end;
end;
Result := True;
finally
Img.Unmap(Data);
end;
end;
end;
procedure RenderFrame(const Index : integer; const aFrames : array of TGifFrameItem; const aDisplay : TBitmap);
var
I, First, Last: Integer;
begin
Last := Index;
First := Max(0, Last);
aDisplay.Clear(aFrames[Index].fBackColor);
while First > 0 do
begin
if (fScreenWidth = aFrames[First].Bitmap.Width) and (fScreenHeight = aFrames[First].Bitmap.Height) then
begin
if (aFrames[First].FDisposalMethod = GIF_DISPOSAL_BACKGROUND) and (First < Last) then
Break;
end;
Dec(First);
end;
for I := First to Last - 1 do
begin
case aFrames[I].FDisposalMethod of
GIF_DISPOSAL_UNSPECIFIED,
GIF_DISPOSAL_LEAVE:
begin
// Copy previous raw frame onto screen
MergeBitmap(aFrames[i].Bitmap, aDisplay, aFrames[i].Bitmap.Bounds,
aFrames[i].FPos.X, aFrames[i].FPos.Y);
end;
GIF_DISPOSAL_BACKGROUND:
if (I > First) then
begin
// Restore background color
aDisplay.ClearRect(TRectF.Create(aFrames[i].FPos.X, aFrames[i].FPos.Y,
aFrames[i].FPos.X + aFrames[i].Bitmap.Width,
aFrames[i].FPos.Y + aFrames[i].Bitmap.Height),
aFrames[i].fBackColor);
end;
GIF_DISPOSAL_PREVIOUS: ; // Do nothing - previous state is already on screen
end;
end;
MergeBitmap(aFrames[Index].Bitmap, aDisplay, aFrames[Index].Bitmap.Bounds, aFrames[Index].FPos.X, aFrames[Index].FPos.Y);
end;
var
Introducer: Byte;
ColorTableSize: Integer;
tmp: TBitmap;
LFrame: TGifFrameItem;
FrameIndex: Integer;
I: Integer;
LBC : integer;
LFrames : array of TGifFrameItem;
rendered : array of TBitmap;
begin
Result := False;
if not Check(Stream) then
Exit;
AFrameList.Clear;
FGifVer := verUnknow;
FPalette := nil;
LScanLineBuf := nil;
try
Stream.Position := 0;
Stream.Read(FHeader, SizeOf(FHeader));
{$IFDEF BIGENDIAN}
with FHeader do
begin
ScreenWidth := LEtoN(ScreenWidth);
ScreenHeight := LEtoN(ScreenHeight);
end;
{$ENDIF}
if (FHeader.Packedbit and $80) = $80 then
begin
ColorTableSize := FHeader.Packedbit and 7 + 1;
ReadPalette(Stream, 1 shl ColorTableSize, FPalette);
end;
if not ProcHeader then
Exit;
FrameIndex := 0;
SetLength(LFrames, 0);
while True do
begin
LLocalPalette := nil;
Repeat
Introducer := ReadAndProcBlock(Stream);
until (Introducer in [$2C, $3B]);
if Introducer = $3B then
Break;
Stream.Read(LDescriptor, SizeOf(LDescriptor));
{$IFDEF BIGENDIAN}
with FDescriptor do
begin
Left := LEtoN(Left);
Top := LEtoN(Top);
Width := LEtoN(Width);
Height := LEtoN(Height);
end;
{$ENDIF}
if (LDescriptor.Packedbit and $80) <> 0 then
begin
ColorTableSize := LDescriptor.Packedbit and 7 + 1;
ReadPalette(Stream, 1 shl ColorTableSize, LLocalPalette);
end
else
begin
LLocalPalette := Copy(FPalette, 0, Length(FPalette));
end;
if not ProcFrame then
Exit;
LFrame := TGifFrameItem.Create;
LFrame.FTime := 10 * LGraphicsCtrlExt.DelayTime;
LFrame.FDisbitmap := TBitmap.Create(LFrameWidth, LFrameHeight);
LFrame.FPos := Point(LDescriptor.Left, LDescriptor.Top);
LFrame.FDisposalMethod := 7 and (LGraphicsCtrlExt.Packedbit shr 2);
if not ReadScanLine(Stream, @LScanLineBuf[0]) then
Exit;
if not WriteScanLine(LFrame.FDisbitmap, @LScanLineBuf[0]) then
Exit;
if LGraphCtrlExt then
begin
LIsTransparent := (LGraphicsCtrlExt.Packedbit and $01) <> 0;
If LIsTransparent then
LBC := LGraphicsCtrlExt.ColorIndex
else
LBC := FBackgroundColorIndex;
end
else
LBC := FBackgroundColorIndex;
LFrame.fBackColor := LLocalPalette[LBC].Color;
Inc(FrameIndex);
SetLength(LFrames, FrameIndex);
LFrames[FrameIndex - 1] := LFrame;
end;
SetLength(rendered, Length(LFrames));
for I := 0 to Length(LFrames) - 1 do
begin
tmp := TBitmap.Create(FScreenWidth, FScreenHeight);
RenderFrame(I, LFrames, tmp);
rendered[i] := tmp;
end;
for I := 0 to Length(LFrames) - 1 do
begin
LFrames[i].Bitmap.Assign(rendered[i]);
FreeAndNil(rendered[i]);
AFrameList.Add(LFrames[i]);
end;
Result := True;
finally
LLocalPalette := nil;
LScanLineBuf := nil;
rendered := nil;
LFrames := nil;
end;
end;
function TGifReader.Check(Stream: TStream): Boolean;
var
OldPos: Int64;
begin
try
OldPos := Stream.Position;
Stream.Read(FHeader, SizeOf(FHeader));
Result := (CompareMem(@FHeader.Signature, @GifSignature, 3)) and
(CompareMem(@FHeader.Version, @VerSignature87a, 3)) or
(CompareMem(@FHeader.Version, @VerSignature89a, 3));
Stream.Position := OldPos;
except
Result := False;
end;
end;
function TGifReader.Check(FileName: string): Boolean;
var
fs: TFileStream;
begin
Result := False;
fs := TFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite);
try
Result := Check(fs);
except
end;
fs.DisposeOf;
end;
constructor TGifReader.Create;
begin
inherited Create;
end;
destructor TGifReader.Destroy;
begin
inherited Destroy;
end;
{ TGifFrameItem }
destructor TGifFrameItem.Destroy;
begin
if FDisbitmap <> nil then
begin
FDisbitmap.DisposeOf;
FDisbitmap := nil;
end;
inherited Destroy;
end;
end.
来源：https://stackoverflow.com/questions/45285599/how-to-use-animated-gif-in-firemonkey