hi,
how to do deferred shading with glsl ? i need to store 7 components in a 64 bits color, the two firsts in the R component, the two seconds in the G component, etc… But i don’t know how to pack them and how to unpack them. To have a 64 bits color buffer i use a simple pbuffer. I use ATI 9800 pro and nvidia fx5900xt cards.
thx.
You can do packing on NV only. Make a 128 float target and pack 8 16 bit half float numbers in there via PK2H
For ATI, I assume MRT (multiple render targets) would solve this but I think they haven’t exposed this yet.
MRT has been exposed for ages.
And what about the glslang API?
This extension (ATI_draw_buffer) will be included in OpenGL 2.0 as an ARB extension. So it “isn’t vendor specific”.
Originally posted by Korval:
[quote]MRT has been exposed for ages.
And what about the glslang API?[/QUOTE]Take a look at the new GLSL 1.1 specification. There are new built-in output data types for the fragment shader: gl_FragData[i].
Sorry about the bad info on drawbuffers. You can use it via ARB_vertex_program today so it looks like it’s possible.
And for the NV40, it supports ATI_draw_buffers (emulation on previous).
And when GLSL 1.1 support is added …
Originally posted by Corrail:
This extension (ATI_draw_buffer) will be included in OpenGL 2.0 as an ARB extension. So it “isn’t vendor specific”.
What GL 2.0?
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