Images in Livecode

[[-hh]]

Hi, just follow the arrows.
There is only one button (orange), script has at about 30 lines, for compressing PNG -> JPNG.
And there is only one button (green), script has also at about 30 lines, for decompressing JPNG -> PNG.

In order to keep it simple the file-versions have their own buttons, the file system dialogs need some more lines. But the method is identical.
The fileformat structure is simply a header for width, height, useAlphaData, then the alphadata (or maskdata), then the JPEG-compressed imageData. Backwards convert the JPEG-data to PNG and set the alphaData/maskData. Of course we use additionally compress/decompress.

That's all. No advanced things in there. (One has to be careful when using the different parts of the data.)
The js- and objC-people have a "JPNG"-format that uses not a header but a footer. So a conversion between the two formats is easily possible.

[bidgeeman]

Hi again
I have been searching the forum for a quick way of processing an image so that it's color
slightly changes. It's a transparent .png overlay of guidelines for measurements that sits over
the main image area. The lines are a very light blue color but I just realized that if a design is
loaded that is blue the lines on the grid will disappear into the design. I tried to convert it to
greyscalewith a greyscale script I found in one of Klaus's old threads but the image processing
takes a lot of time to process evey pixel. Can anyone suggest a quicker way out of this?

Thanks again
Bidge

[[-hh]]

Why don't you look at "Sample stacks" (sort by date downwards) of the LC toolbar:
'LCImageToolBox' or here:
http://livecodeshare.runrev.com/stack/826/ for use with LC 8/9 on Mac/Win/linux
http://livecodeshare.runrev.com/stack/827/ for use with LC 6/7/8/9 on Mac
??

[bidgeeman]

Oh thanks [hh]....I had not seen that stack before in the samples?
It looks like an answer is there somewhere

Bidge

[richmond62]

[bidgeeman]

richmond62.
Thanks you so much. Maybe this is the reason I am having so much trouble with learning LC. I search and search for solutions and get multiple answers which I experiment with and then I post a thread and find out there is a much easier way to do things? It does make things difficult from a complete beginners point of view. Thanks to this forum though otherwise I would be doing things the long way

Thank you all again.
Bidge

[richmond62]

It's not that simple: I just made a fool of myself in front of Klaus Nomi (whoops, Mayer) and Mark Waddingham
over on the Use-List.

Wrong Klaus

[[-hh]]

Richmond,
it is so good to see that you dont have any problem.

[richmond62]

? Problem ?

Some people take themselves and their failings far, far too seriously.

Life is to be enjoyed & Klaus and I have a good thing going that has been going on for years

[bidgeeman]

I took a brief look and it seemed to process the bitmap effect a lot faster than I have experienced. I'll take another look in the morning.
Don't worry...I always make a fool of myself It makes you more human

Bidge

[Klaus]

It's not that simple: I just made a fool of myself in front of Klaus Nomi (whoops, Mayer)...

And again! Come on, my name is even a valid english word...

[richmond62]

Messing around with the RGB levels of an image can produce great effects.

[richmond62]

And again!

Rishmond is very shorry, and begsh forgiveness.

Mind you: Klaus Nomi WAS a fantastic musician.

[Klaus]

And again!

Rishmond is very shorry, and begsh forgiveness.

Thou shalt be forgiven!

Mind you: Klaus Nomi[/b] WAS a fantastic musician.

Sure he was, but that's really not my cup of tea!

[richmond62]