glBlendFuncSeparate more transparent on iOS

Question

I'm drawing to an offscreen framebuffer using

glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);

and drawing this Framebuffer using

glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

Everything works fine on Mac, Window and Linux using OpenGL, but on iOS with OpenGL ES the resulting framebuffer is much more transparent.

What could I be doing wrong and how can I fix it?

Maybe the reason is similar to here: http://stackoverflow.com/questions/10032036/iphone-opengl-es-1-1-alpha-blend-make-texture-wrong-color — brigadir, Apr 06 '12 at 11:47

score 0 · Accepted Answer · edited Sep 24 '12 at 23:02

0

Okay fixed it. It was a stupid mistake I did myself ;)

I accidentally added #define glBlendFuncSeparatein one of my header files,
which caused glBlendFuncSeparate to do nothing ;)

edited Sep 24 '12 at 23:02

Anne

answered Apr 12 '12 at 17:10

jhasse

1 Answers1