bigger framebuffer than texture?...

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bigger framebuffer than texture?...

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Gernot Frisch...

Posted: Thu Oct 22, 2009 11:48 am

Guest

Hi,

my problem is, that on iPhone I somehow can't get the alpha pixels of a
texture if the size is < 16x16.
I think it might be that the FBO I create is smaller, because I can load and
draw 1x1 textures.

Can the framebuffer be 16x16 and the texture 1x1?
glFramebufferTexture2DExt( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, texture, 0 );

--
------------------------------------
Gernot Frisch
http://www.glbasic.com

jbwest...

Posted: Thu Oct 22, 2009 9:22 pm

Guest

"Gernot Frisch" <me at (no spam) privacy.net> wrote in message
news:7kagrtF38g3omU1 at (no spam) mid.individual.net...

Quote:

Hi,

my problem is, that on iPhone I somehow can't get the alpha pixels of a
texture if the size is < 16x16.
I think it might be that the FBO I create is smaller, because I can load
and draw 1x1 textures.

Can the framebuffer be 16x16 and the texture 1x1?
glFramebufferTexture2DExt( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, texture, 0 );

--
------------------------------------
Gernot Frisch
http://www.glbasic.com

Did you forget about power-of-2 requirement on general textures ? You can
load a 1x1 but you have to create a 2x2 unless you use NPOT extension.

jbw

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