Easy Pixel painting question

OpenGL Development JOGL Development
#1

I have created a windows BMP file using Paint Shop Pro and I would like to be able to display this on a GLCanvas. I know this should be easy but I have searched the web, looked through a thick OPenGL book and still can’t seem to find out how to do this.

A few lines of code which give an example of how to do this would be highly useful.

Regards,

Sally

#2

Hi,

Can’t you use png or Jpeg image instead of BMP… You’ll find a lot of code to use Texture with jogl for those formats. (A class for texture was posted on this forum but i can’t remember where, sorry)

Or you’ll have to write a piece of code that unpack bmp data into RGB value to draw it.

#3

Yes, no problem , I’ll use PNG then. I’m probably going totally down the wrong path here but I have opened it up using ImageIcon image = new ImageIcon(“file.png”);

So, I have an image but I am completely at a loss as to how I convert it into pixels so that I can use the jogl interface to display it onto a GLCanvas.

What I want to do sounds so simple - load an image and display it onto a GLCanvas. But my opengl book covers, in great detail, many aspects of advanced 3d graphics rendering and image pipelines and image-storage modes etc but does not appear to address my simple issue … perhaps the book is too advanced for me at this stage and maybe what I want to do is so basic that it just assumes the reader knows how to do it already. ???

Regards,

Sally

#4

glDrawPixels is the way to do this simply.

Cas :slight_smile:

#5

You’ll find an easy way to draw an image here :

http://today.java.net/pub/a/today/2003/09/11/jogl2d.html

Hope it helps.

#6

Thank you very much. Would you believe it, I’d actually spent a lot of time going through that document last week (it’s a very good jogl 2d starter) and learnt how to draw rectangles, lines, polygons etc. I’d totally forgotten it also demonstrated how to display a gif. :o I must be going senile at my tender age of 28.

Thanks

Regards,

Sally