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RE: [Public WebGL] WebGL2: Missing parameter names for getParameter?

Great! Thanks for the clarification!


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On Thu, Jan 29, 2015 at 11:11 AM, Olli Etuaho <oetuaho@nvidia.com> wrote:

PACK_IMAGE_HEIGHT and PACK_SKIP_IMAGES are remnants of an older version of the spec, they were removed in GLES 3.0.1, and should be removed from WebGL.

As far as DRAW_BINDING goes, it seems like it should be DRAW_BUFFER<i> instead of DRAW_BINDING (DRAW_BUFFER<i> is missing from that list).

IMPLEMENTATION_COLOR_READ_FORMAT/TYPE do still exist in GLES3.0 and so also in WebGL 2.0, but they were also reintroduced in WebGL 1.0 last year, so they should not be in that table listing only new valid parameters. They are not for float textures, since float framebuffer attachments and reading them are only added in EXT_color_buffer_float, but other read formats that might be allowed by the implementation.

​Good that someone caught these issues, I submitted a pull request that fixes the list:​ https://github.com/KhronosGroup/WebGL/pull/843


From: owners-public_webgl@khronos.org <owners-public_webgl@khronos.org> on behalf of Florian Bösch <pyalot@gmail.com>
Sent: Thursday, January 29, 2015 1:29 AM
To: Roger Fong; Kenneth Russell
Cc: public webgl
Subject: Re: [Public WebGL] WebGL2: Missing parameter names for getParameter?
On Thu, Jan 29, 2015 at 10:19 AM, Roger Fong <roger.d.fong@gmail.com> wrote:
Seeing as the WebGL2 spec does not outline any differences with what readPixels accepts I'm assuming it has remained the same and there is still no need for IMPLEMENTATION_COLOR_READ_FORMAT and IMPLEMENTATION_COLOR_READ_TYPE in WebGL 2 (and so should be removed from the getParameter table)

Hm, maybe because of EXT_color_buffer_float. If you're attaching a floating point texture and bind the fbo I think you're required to read back floats. I think Kenneth should be able to shed light on this.
I'm working on WebGL 2 however, not 1, and WebGL 2 does use ES 3.0 so these should indeed exist on the WebGL2RenderingContext IDL.
Correct, they should be on the WebGL 2 IDL.

DRAW_BINDING is not in any specification I could find (it's not in ES 2.0, ES 3.0, ES 3.1, GL 2.0, GL 3.0 or GL 4.0). What's that parameter?

I could not find it anywhere either but it definitely shows up here: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.1
which is confusing, so maybe it shouldn't be on the getParameter table either.
That's weird, maybe a typo or something?