Re: [Swftools-common] Problems with PNG placement

[Mick]

Hi Chris,

Refusing to give up, I took a look at some of the code. Twips seem to 
crop up quite a lot in various routines. I had assumed the metric used 
for size, position etc. was pixels. Out of interest I multiplied all my 
pixel values by 20 to convert them to twips. This gave:

.flash filename="test_swfc.swf" version=6 fps=50 bbox=8700x2440
  .png img1 filename="test.png"
  .put img1 scalex=8700 scaley=2440
.end


The image now renders perfectly. The HTML maintains the original size in 
pixels as specified by the object tag. Notice I had to add the scalex 
and scaley properties to the .put command. Additionally, any subsequent 
zooming or moving of the image is now carried out with a great deal more 
accuracy.

I'm still not sure I fully understand why this method works better. It 
would be nice if someone could maybe explain what is happening under the 
bonnet and how twips and pixels fit into the bigger picture. Anyway, for 
now I have a workaround :-)

Cheers,
Mick

Chris Pugh wrote:
> I though I forwarded this mail to the list, when you originally sent
> it to me by mistake?
>
> I did reply, on list ( or thought I had ).
>
> As I said last time, one is a .png converted to an swf, the other is a
> .png inside an swf, i.e. inside a bounding box.  The
> rendering seems a tad odd on the compiled swf with the bottom left of
> the yellow section of rectangle seem wider than the top left of same,
> but adjusting the bounding box/positioning seems to sort the problem
> out - at least according to my old eyes!   Maybe this is not really an
> swftools issue?
>
> Hopefully there is someone out there with better eyes, and a more
> precise explanation as to what's actually
> happening?
>
> Regards,
>
>
> Chris.
>
> On 14 March 2010 15:19, Mick <address@hidden> wrote:
>   
> > Hi Chris,
> >
> > Not sure I explained the problem well enough. Let me try again. The first
> > row (top row) and first column (left column) of pixels in the image are
> > being duplicated. This is making the image one pixel wider and one pixel
> > longer and as a result the last row (bottom row) and last column (right
> > column) of pixels are not appearing (effectively being pushed off the
> > stage).
> >
> > It would not be possible to see this with the image you attached in your
> > last message as all the pixels are red. If a black border, one pixel thick
> > were added around the edge of the image, then the problem would present
> > itself. The resulting swf would display an image with a black border two
> > pixels thick on the left and top, and no border on the bottom and right.
> >
> > I have included the original attachments again (zipped up this time) so you
> > can have a better look. I used a border that changed from black to yellow so
> > I could establish if the pixels were being duplicated or if the image was
> > being corrupted and the last row/column were being shown as the first
> > row/column. The png was created using the GIMP.
> >
> > Hope this makes more sense.
> >
> > Cheers,
> >
> > Mick
> >
> >
> >
> >
> > Chris Pugh wrote:
> >
> >     
> > > Mick,
> > >
> > > Yes it is the blank stage.  The one conversion is an image inside an
> > > swf, the other is an swf in its pwn right.
> > >
> > > I also tried your png image again, doing the conversion and setting
> > > the html code myself, a your original post to the list did not include
> > > all the attachments you mentioned.  I do see a slight variation on the
> > > render, however think it is a result of the png itself,  which looks
> > > weird, even when opened in GIMP.  What was it created with?
> > >
> > > I created a similar, but slightly smaller rectangular png myself, and
> > > all seems to work fine with it.  Its attached.  Substitute it for your
> > > own version, repeat the process you used before, probably much as
> > > below, then see what happens.
> > >
> > > .flash filename="test_swfc.swf" version=6 fps=50 bbox=435x122
> > >  .png img1 filename="test2.png"
> > >  .put img1
> > > .end
> > >
> > > then,
> > >
> > >    png2swf test2.png -o test_png2swf.swf
> > >
> > >    swfdump -E test_png2swf.swf > test_png2swf.html
> > >
> > >    swfdump -E test_swfc.swf > test_swfc.html
> > >
> > >
> > > Regards,
> > >
> > >
> > > Chris.
> > >
> > >       
> > > On 07/03/2010, Mick <address@hidden> wrote:
> > > Hi Chris,
> > >
> > >  Have just tried compiling the script you suggested with swfc. All I get
> > > is
> > > a black rectangle measuring 435x122 pixels. I'm assuming this is the blank
> > > stage. Not sure how this explains my problem. Any chance you can
> > > elaborate?
> > >
> > >  Cheers,
> > >  Mick
> > >