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Posted to user@poi.apache.org by Tobias Meissner <to...@gmail.com> on 2011/07/13 15:50:03 UTC
Issue concerning setanchor usage for poi hslf
Hi there,
I've got an issue here with the setAnchor method in poi hslf.
I'm trying to do the following:
I read a png picture file via the ByteArrayInputStream and want to add the
picture to a ppt slide which I've created.
Therefore I use the following lines:
ByteArrayInputStream bais = new ByteArrayInputStream(image);
int picID = slideShow.addPicture(img, Picture.PNG);
Picture p01 = new Picture(picID);
p01.setAnchor(setBoundings(posX, posY,pictureWidth,pictureHeight);
slide.addShape(p01);
This works. The only problem is: the Picture I want to add to the slide has
the size 431x450 Pixel.
I don't really get the unit which is used by POI in the setAnchor method,
it's not pixels (otherwise the picture is far too big).
But when I scale the picture I get aliasing effects (blurred) in the
PowerPoint slide which do not exist in the original picture file.
In the documentation I find a lot like MASTER_DPI, POINT_DPI and all that
stuff but I don't get it.
Question: How can I fix this?
Anyone an idea besides "use the right measurements"?
Thanks!
Re: Issue concerning setanchor usage for poi hslf
Posted by Tobias Meissner <to...@gmail.com>.
solved!
The problem is, that the call to setDefaultSize() produces an error in POI.
I just transferred the code of this method to my code, and now it works!!!
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Re: Issue concerning setanchor usage for poi hslf
Posted by Tobias Meissner <to...@gmail.com>.
Unfortunately this leads to an error:
org.apache.poi.hslf.model.Picture.getPictureData(Picture.java:176)
org.apache.poi.hslf.model.Picture.setDefaultSize(Picture.java:148)
Here is my code:
byte[] img = (byte[]) pictureObject;
ByteArrayInputStream bais = new ByteArrayInputStream(img);
int picID = ppt.addPicture(img, Picture.PNG);
Picture p01 = new Picture(picID);
p01.setAnchor(setBoundings(20, 20,50,50));
p01.setDefaultSize();
slide.addShape(p01);
I just don't get the clue...
kind regards
Tobias
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Re: Issue concerning setanchor usage for poi hslf
Posted by Yegor Kozlov <ye...@dinom.ru>.
Call Picture.setDefaultSize() after insert. It should resize your
image to the original dimensions.
Yegor
On Wed, Jul 13, 2011 at 5:50 PM, Tobias Meissner
<to...@gmail.com> wrote:
> Hi there,
>
> I've got an issue here with the setAnchor method in poi hslf.
> I'm trying to do the following:
> I read a png picture file via the ByteArrayInputStream and want to add the
> picture to a ppt slide which I've created.
> Therefore I use the following lines:
>
> ByteArrayInputStream bais = new ByteArrayInputStream(image);
> int picID = slideShow.addPicture(img, Picture.PNG);
> Picture p01 = new Picture(picID);
> p01.setAnchor(setBoundings(posX, posY,pictureWidth,pictureHeight);
> slide.addShape(p01);
>
> This works. The only problem is: the Picture I want to add to the slide has
> the size 431x450 Pixel.
> I don't really get the unit which is used by POI in the setAnchor method,
> it's not pixels (otherwise the picture is far too big).
> But when I scale the picture I get aliasing effects (blurred) in the
> PowerPoint slide which do not exist in the original picture file.
> In the documentation I find a lot like MASTER_DPI, POINT_DPI and all that
> stuff but I don't get it.
>
> Question: How can I fix this?
> Anyone an idea besides "use the right measurements"?
>
> Thanks!
>
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