[SOLVED] Is there a Way to Save Animated GIFs?
lazarus / 39-Graphics

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pixelink · 2019-10-13 14:20

Is there a Way to Save Animated GIFs?
Maybe a library or package

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lainz · 2019-10-13 14:25

BGRABitmap can save Gif, you maybe can look how it's done inside
LazPaint for example.

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pixelink · 2019-10-13 14:41

Quote from: lainz on October 13, 2019, 04:25:08 pmBGRABitmap can save
Gif, you maybe can look how it's done inside LazPaint for example.

I am aware that it can save a GIF.

But what about an Animated GIF... you know, multiple images into one
animated gif.

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lainz · 2019-10-13 14:49

Quote from: pixelink on October 13, 2019, 04:41:01 pmQuote from: lainz
on October 13, 2019, 04:25:08 pmBGRABitmap can save Gif, you maybe can
look how it's done inside LazPaint for example.

I am aware that it can save a GIF.

But what about an Animated GIF... you know, multiple images into one
animated gif.

It can save a gif with multiple frames, try opening an animated gif,
select a frame and edit it, then save. The frame is saved inside the
animated gif. So it can.

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pixelink · 2019-10-13 15:23

Quote from: lainz on October 13, 2019, 04:49:18 pmQuote from: pixelink
on October 13, 2019, 04:41:01 pmQuote from: lainz on October 13, 2019,
04:25:08 pmBGRABitmap can save Gif, you maybe can look how it's done
inside LazPaint for example.

I am aware that it can save a GIF.

But what about an Animated GIF... you know, multiple images into one
animated gif.

It can save a gif with multiple frames, try opening an animated gif,
select a frame and edit it, then save. The frame is saved inside the
animated gif. So it can.

Okay.. will check it out. thanks

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pixelink · 2019-10-13 15:44

Quote from: lainz on October 13, 2019, 04:49:18 pmQuote from: pixelink
on October 13, 2019, 04:41:01 pmQuote from: lainz on October 13, 2019,
04:25:08 pmBGRABitmap can save Gif, you maybe can look how it's done
inside LazPaint for example.

I am aware that it can save a GIF.

But what about an Animated GIF... you know, multiple images into one
animated gif.

It can save a gif with multiple frames, try opening an animated gif,
select a frame and edit it, then save. The frame is saved inside the
animated gif. So it can.

Okay, tried it.

1) When I open a gif, it shows me all frames in a popup window, but I
can only choose one
And it loads just one fram into one layer.

2) If I load two frames, one-by-one, I can have multiple layers
But, when I save it as an animated gif there is no animating

What am i missing?

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lainz · 2019-10-13 21:36

Quote from: pixelink on October 13, 2019, 05:44:33 pmWhat am i
missing?

Reading the source code? I created this snippet only with the
information given at lazpaint procedure
TLazPaintImage.UpdateGifFileUTF8(AFilename: string;
  AOutputFilename: string); 

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i var  gif :
TBGRAAnimatedGif;  bmp: TBGRABitmap;begin  bmp :=
TBGRABitmap.Create(100,100,BGRAWhite);  bmp.FontHeight := 30; 
bmp.TextRect(Rect(0,0,100,100), 'Hello', taCenter, tlCenter,
BGRABlack);   gif := TBGRAAnimatedGif.Create;  gif.SetSize(100,100); 
gif.LoopCount:=100;  gif.AddFullFrame(bmp, 500);  
bmp.Fill(BGRAWhite);  bmp.TextRect(Rect(0,0,100,100), 'World',
taCenter, tlCenter, BGRABlack);   gif.AddFullFrame(bmp, 500); 
gif.SaveToFile('image.gif');  gif.Free;   bmp.Free;

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pixelink · 2019-10-14 00:30

Quote from: lainz on October 13, 2019, 11:36:01 pmQuote from: pixelink
on October 13, 2019, 05:44:33 pmWhat am i missing?

Reading the source code? I created this snippet only with the
information given at lazpaint procedure
TLazPaintImage.UpdateGifFileUTF8(AFilename: string;
  AOutputFilename: string); 


Thanks Lainz

I didn't read the code because LAZPaint wasn't creating an Animated
gif (with layers) from the way I was using it.
That's why i ask "What am I Missing".

Why wasn't LAZPaint working by opening, adding two images (as Layers)
and save as Animated Gif?
I didn't see any other way to make LAZ Paint work out of the box.

Thanks for the code, that seems pretty easy.

Just one q:
How do I set the frame length for each frame in miliseconds or
seconds?

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lainz · 2019-10-14 00:50

Yes is planned to do the saving from the layers to animations.

But it can open a gif and save the frame into the same animated gif.
That's from where I get the code.

The second parameter of addfullframe sets the frame duration.

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pixelink · 2019-10-14 00:57

Quote from: lainz on October 14, 2019, 02:50:28 amYes is planned to do
the saving from the layers to animations.

But it can open a gif and save the frame into the same animated gif.
That's from where I get the code.

The second parameter of addfullframe sets the frame duration.

Okay...


What does this do. I stumbled across this

gif.AverageDelayMs

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circular · 2019-10-14 21:32

It returns the average of the frame durations in the file. It gives
you an idea of the speed

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winni · 2019-10-15 16:25

Hi!

Creating an amimated GIF with BGRA - that's cool.

In the Gimp this a lot of tricky handicraft. And in BGRA it's such
easy!

Thank you circular!

Winni

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circular · 2019-10-16 13:31

You’re welcome 

Next step maybe is to provide optimisations of GIF. Some files where
only a small part of the image change could be smaller.