topic Linux OpenGL: FBO stencil buffer in Developing Games on Intel Graphics

Linux OpenGL: FBO stencil buffer

rpedela — Thu, 12 Aug 2010 19:52:44 GMT

I am doing some feasibility research on using iCore graphics on Linux with OpenGL. I have searched for the answer to this question but found none.

Assuming GL_EXT_framebuffer_object support, is it possible to create an RGBA8, D24, S8 FBO? The reason I ask is that on ATI and NVIDIA it is possible but a packed depth/stencil buffer must be used. As far as I can tell GL_EXT_packed_depth_stencil is not supported. So can separate depth and stencil buffers be attached to an FBO?

Linux OpenGL: FBO stencil buffer

Doraisamy_G_Intel — Thu, 19 Aug 2010 21:36:20 GMT

Hi,

I don't believe any current Intel graphics hardware in the market supports GL_EXT_packed_depth_stencil.

Regarding independent stencil buffers, even though the spec supports it, it is generally not advised to be used, as it is not guaranteed to be implemented. Refer to: http://www.opengl.org/wiki/GL_EXT_framebuffer_object#Stencil

Can you avoid stencil buffer and use Color+Depth only?

See http://www.opengl.org/wiki/GL_EXT_framebuffer_object#Color_texture.2C_Depth_texture

Cheers,
-Ganesh

Linux OpenGL: FBO stencil buffer

rpedela — Thu, 19 Aug 2010 22:16:56 GMT

I need to simulate the capabilities of the screen with an FBO. So no, color + depth does not work. Do you know of any plan to support GL_EXT_packed_depth_stencil in Intel HD graphics?

Linux OpenGL: FBO stencil buffer

Doraisamy_G_Intel — Thu, 16 Sep 2010 17:12:10 GMT

We are working to add more inclusive support of the rendering APIs and their extensions, but there are no announced plans to specifically support GL_EXT_packed_depth_stencil yet.