Re: [UFO-devel] Hallo Wieder - Clarification of my problem - I will pay $ for your consulting!

[Johannes S. <sch...@us...>]

Hi again,

Just to make clear that the image is correctly displayed:
I have attached the openclipart.org logo (which is public domain) as C header 
file (char array), again named "fuzzy.h".

The previous one was just random painting with the GIMP and looked like some 
screwed up memory ...


I hope I have the time on weekend to describe the UFO architecture
a little bit.


Regards,
Johannes

Am Freitag, 11. Mai 2007 14:28 schrieb Johannes Schmidt:
> Hi Andrew,
>
> I have to admit, that it isn't really outlined in detail,
> how to use images in LibUFO.
>
> If you want to pipe an array of chars representing an image, you can use
> UImageIO to create the basic image software buffer used in UFO.
>
> To get a hardware image (i.e. OpenGL image) usable in UFO,
> you need a UImage object.
> Usually, you shouldn't need to use the UGL_Image class directly.
>
> In short:
> Use the display image to convert the UImageIO object (the software buffer)
> to a UImage object (the hardware surface).
> UImage * UDisplay::createImage(UImageIO *);
>
> Longer version:
> Several backends handle hardware data differently (especially, how hardware
> surfaces are shared between contexts)
>
> The display object handles the whole connection to the underlying system
> and controls all data acquired by the system (for instance an OpenGL
> texture encapsulated in a UImage object).
>
> Therefore, the display object is responsible for all data/memory allocated
> by the system, as video devices, images, fonts, events etc.
> (this has changed a little bit over time, so this is usually done by the
> UXDisplay class, whereas the UDisplay class is still a bit limited).
>
> I have attached two files:
> A modified version of test/base.cpp, which reads in a char array, creates a
> UImageIO object, then a UImage object and uses this as Icon for a label.
>
> A header file called fuzzy.h which contains the image array (created with
> the GIMP).
>
> Compile it via:
> g++ -o base base.cpp `pkg-config --cflags --libs ufo`
>
> If you have the GIMP, you can create another image and save it as C header
> under the name "fuzzy.h", then recompile.
>
> If there are any problems understanding the code, please ask.
>
>
> Best regards,
> Johannes
>
> Am Freitag, 11. Mai 2007 03:43 schrieb hv...@st...:
> > Hi again,
> >
> > I'm having some serious trouble trying to figure out how to pass an image
> > so that libUFO displays it. I'm trying to follow the directions which you
> > outlined on this email that I found archived on the mailing list, but I
> > can't for the life of me get it to work.
> >
> > I'm really panicking, because I need to have this functionality working
> > soon. As far as I can tell from the specifications on sourceforge,
> > UGL_Image must be passed as an argument to UImage, and then you can pass
> > UImageIO as an argument to UGL_Image? (And UGL_Image can take a flat
> > array of unsigned char, each representing one color of a pixel).
> >
> > If you could write out a quick example which reads in an image from an
> > array or something (not a file, I can do that with UIcon) and explain a
> > bit how it functions I'd be happy to Paypal you $25 for all the time
> > you've spent helping me. Consider it a "donation" for all the hard work
> > you've put into this great toolkit!
> >
> > Mit sehr Freundlichen Grussen,
> > Andrew
> >
> > "It is not that trivial but it is possible.
> >
> > If you do not care about performance too much (at least in the
> > beginning), you can use the built-in image class (UImage) and assign this
> > as icon of a label (or button).
> >
> > That means, you create your own image buffer and feed it as RGB(A) data
> > to an UImageIO class, create an image and so on. I have attached a small
> > example (image.cpp) which shows how to do that (based on the base.cpp
> > example). Compile it via:
> > g++ -o image image.cpp `pkg-config --cflags --libs ufo`
> >
> > Otherwise you can draw the image yourself using OpenGL methods. To do
> > this, you have to subclass UWidget and override
> > UWidget::paintWidget(UGraphics*) with your own code (set up matrices and
> > OpenGL state, draw image, revert OpenGL matrices and states). "
> >
> >
> >
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