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Render font help!

Started by stefu Jun 3, 2003 at 10:54 AM 2 replies 350+ views

Original Post

Jun 3, 2003 at 10:54 AM

I can''t get my font rendering transparently

I have antialised font in greyscale image, 1 byte for each pixel, where value 255 is full visible and 0 is not visible. What is the right format to use in glTexImage2D? GL_LUMINANCE? GL_ALPHA? And what are teh blend functions to use? For example glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) reners just black rects. Or do I need to have RGBA texture, where R=G=B=255 and A varies?

stefu

Jun 3, 2003 at 11:04 AM

quote:
Original post by stefu
Or do I need to have RGBA texture, where R=G=B=255 and A varies?

This works with glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
But I''d want same effect with only aplha channel (without RGB) and so that I can change font color with glColor().

But if not possible thisa is ok then

Thanks.

Leyder Dylan

Jun 4, 2003 at 5:58 AM

Have you tryed :


glDisable(GL_TEXTURE_2D);
glColor();
glEnable(GL_TEXTURE_2D);

========================
Leyder Dylan (dylan.leyder@slug-production.be.tf
http://www.slug-production.be.tf/

Jun 4, 2003 at 9:44 AM

Well, try GL_ALPHA and set GL_RED_BIAS, GL_GREEN_BIAS and GL_BLUE_BIAS to the desired values (msdn.microsoft.com)

PM

Times change...

Excuse my poor english!

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