WebGL 2 pipeline updates

[pjcozzi]

e.g., transform feedback

[emackey]

Can someone create a list of what pipeline sections & connections need to be added?

[pjcozzi]

I'll try to do it over the weekend.

[pjcozzi]

Here's the new values to report (see the tables starting on Page 269 of the ES 3 spec and the enums in Section 3.7 of the draft WebGL 2 spec):

Vertex Shader

• ES 3 spec Page 272

Add these:

MAX_VERTEX_UNIFORM_COMPONENTS
MAX_VERTEX_UNIFORM_BLOCKS
MAX_VERTEX_OUTPUT_COMPONENTS
MAX_VARYING_COMPONENTS

Fragment Shader

• ES 3 spec Page 273

Add these:

MAX_FRAGMENT_UNIFORM_COMPONENTS
MAX_FRAGMENT_UNIFORM_BLOCKS
MAX_FRAGMENT_INPUT_COMPONENTS
MIN_PROGRAM_TEXEL_OFFSET
MAX_PROGRAM_TEXEL_OFFSET

Framebuffer

• ES 3 spec Page 276

Add these:

MAX_DRAW_BUFFERS
MAX_COLOR_ATTACHMENTS
MAX_SAMPLES // From WebGL 1 (not reported in the WebGL Report yet, #6)

Textures

• ES 3 spec Pages 269, 270, and 274

Add these:

MAX_3D_TEXTURE_SIZE
MAX_ARRAY_TEXTURE_LAYERS
MAX_TEXTURE_LOD_BIAS

New Uniform Buffers section that is input to vertex and fragment shaders (like Textures)

• ES 3 spec Pages 269, 270, and 274

MAX_UNIFORM_BUFFER_BINDINGS
MAX_UNIFORM_BLOCK_SIZE
UNIFORM_BUFFER_OFFSET_ALIGNMENT
MAX_COMBINED_UNIFORM_BLOCKS
MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS
MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS

New Transform Feedback section

• ES 3 spec Page 275
• A new section that connects from the arrow between the vertex shader and rasterizer section. See the ES 3 pipeline map.

MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS
MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS
MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS

Not sure where

MAX_ELEMENT_INDEX // Maybe Vertex Shader section
MAX_SERVER_WAIT_TIMEOUT
// MAX_ELEMENTS_INDICES // not sure that drawRangeElements will make WebGL 2
// MAX_ELEMENTS_VERTICES // not sure that drawRangeElements will make WebGL 2

[pjcozzi]

Given that all these enums are probably not implemented yet, we could return Not implemented for those.