1301451 - Incorrect implementation defined pixel format and type reported for float renderbuffers and float textures.

Status: RESOLVED WORKSFORME

(Core :: Graphics: CanvasWebGL, defect, P3)

Description

[Jukka Jylänki]

Attachment: float_rendertarget_readpixels.html

When a float renderbuffer is the active color render target in an FBO, GL_IMPLEMENTATION_COLOR_READ_TYPE and GL_IMPLEMENTATION_COLOR_READ_FORMAT return GL_UNSIGNED_BYTE+GL_RGBA, but attempting to glReadPixels() in that format generates an error.

Expected: Either the IMPLEMENTATION_COLOR_READ_* should return GL_FLOAT+GL_RGBA, or glReadPixels() should be able to read back in the format that is advertised.

Comment 1

[Jukka Jylänki]

Attachment: float_rendertarget_texture_readpixels.html

Looks like the same thing occurs with 2D float textures in an FBO.

Comment 2

[Jukka Jylänki]

Tested on Nightly on OS X, though not sure if occurs on all OSes.

Comment 3

[Kelsey Gilbert [:jgilbert]]

Works on my MBP.