I'm trying to convert a frame of animated gif file to "FMX TImage".
The problem with this code is that there is no transparency in the alpha channel does not work.
Sorry for my bad inghlese.
procedure TForm5.Button1Click(Sender: TObject);
var
I,y,x: LongInt;
T: Int64;
io:Tmemorystream;
Dest, Src: PByte;
Alpha: Byte;
begin
try
FImage := TMultiImage.Create;
FImage2 := TMultiImage.Create;
// Load all subimages in file
T := ImagingUtility.GetTimeMicroseconds;
FImage.LoadMultiFromFile('E:\espulso.gif');
FImage2.LoadMultiFromFile('E:\espulso.gif');
for I := 0 to FImage.ImageCount - 1 do
begin
FImage.ActiveImage := I;
if not (FImage.Format in TImagingCanvas.GetSupportedFormats) then
FImage.Format := ifA8R8G8B8;
for Y := 0 to Height - 1 do
begin
Src := FImage.Scanline[y];
Dest := FImage2.ScanLine[y];
for X := 0 to Width - 1 do
begin
Alpha := Src[X * 4 + 3];
Dest[X * 4 + 0] := Src[x * 4 + 0] * Alpha div 255;
Dest[X * 4 + 1] := Src[x * 4 + 1] * Alpha div 255;
Dest[X * 4 + 2] := Src[x * 4 + 2] * Alpha div 255;
Dest[X * 4 + 3] := Alpha;
end;
end;
io:=Tmemorystream.Create;
FImage2.SaveToStream('gif',io);
image1.Bitmap.LoadFromStream(io);
............
break;
end;
// Activate first image and update UI
FImage.ActiveImage := 0;
except
raise;
end;
end;
Have you checked ImagingFmx.pas unit?
It has a functions like:
{ Converts image from TBaseImage instance to FMX bitmap. Bitmap must be already instantiated.}
procedure ConvertImageToFmxBitmap(Image: TBaseImage; Bitmap: TBitmap);
that can directly convert from Imaging image to FMX bitmap (for FMX1 in XE2 only though).
Resaving image as GIF and loading it to FMX bitmap is a bad idea, you lose the alpha channel.
And it seems to me that you will only have the last frame in FMX image after this code is run.
Try something like this first:
FImage.LoadMultiFromFile('E:\espulso.gif');
FmxImage.BeginUpdate;
try
ImagingFmx.ConvertImageToFmxBitmap(FImage, FmxImage.Bitmap);
finally
FmxImage.EndUpdate;
end;
On delphi XE3 the "ImagingFmx.pas" by 4 error.