andru
asked on
Why lousy JPG support with Delphi
Hi Ppl
Why is JPG support so lousy with Delphi? Are there any work arounds?
I've put Jpeg in the uses clause as I have done before I was reminded on another thread of the same subject. But, the only thing is JPGs take ages to load, and when my software tries to modify a image I get the error 'Can only modify an image if it contains a bitmap'.
How can I convert a jpeg image to DIB format so that I can modify the image?
TIA
Why is JPG support so lousy with Delphi? Are there any work arounds?
I've put Jpeg in the uses clause as I have done before I was reminded on another thread of the same subject. But, the only thing is JPGs take ages to load, and when my software tries to modify a image I get the error 'Can only modify an image if it contains a bitmap'.
How can I convert a jpeg image to DIB format so that I can modify the image?
TIA
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how do you "try to modify the image"?
SOLUTION
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Hi --
I use a great component called TImageEn .. You can find it here
http://www.hicomponents.com/nimageen.asp
Rich
I use a great component called TImageEn .. You can find it here
http://www.hicomponents.com/nimageen.asp
Rich
?? well, rwmorey , will be a nice TImage-replacement, but solves not the entire question
meikl ;-)
meikl ;-)
Hi..
Sorry.. You are right I did not answer the complete question. There is the ability to load and save various file formats, including converting from one format to another (GIF, TIFF, JPEG, BMP, WMF) and I am pretty sure you can manipulate the images in any of the formats through the various included components.
Rich
Sorry.. You are right I did not answer the complete question. There is the ability to load and save various file formats, including converting from one format to another (GIF, TIFF, JPEG, BMP, WMF) and I am pretty sure you can manipulate the images in any of the formats through the various included components.
Rich
ASKER
procedure tblink_form.load_image(
name:string);
var
picture:tpicture;
begin
picture:=tpicture.create;
picture.LoadFromFile(name)
end;
When a Jpeg has been loaded with the above code, how do I make it so that I can modify the image in picture?
TIA
name:string);
var
picture:tpicture;
begin
picture:=tpicture.create;
picture.LoadFromFile(name)
end;
When a Jpeg has been loaded with the above code, how do I make it so that I can modify the image in picture?
TIA
>When a Jpeg has been loaded with the above code, how do I make it so that I can
>modify the image in picture?
transform it into a bitmap,
manipulate it,
transform back to jpeg
see my small sample above
meikl ;-)
>modify the image in picture?
transform it into a bitmap,
manipulate it,
transform back to jpeg
see my small sample above
meikl ;-)
ASKER
How do I know if the image is a jpeg as it is coming via the load image dialog.
TIA
TIA
<DIBNeeded is used when the jpeg image needs a bitmap representation of its image. Call DIBNeeded just before drawing rather than while drawing for optimization.>