Bug 208875 – [WebGL2] Complete new texture upload entry points in WebGL2RenderingContext

• Component: WebGL
• Status: RESOLVED FIXED

[Justin Fan]

[WebGL2] Introduce 3D textures to WebGL2RenderingContext

[Kenneth Russell]

Once the DOM-to-texture upload paths have been refactored in Bug 210766, it's feasible to expose the 3D texture upload entry points as they'll just activate code paths already fully implemented underneath.

[Kenneth Russell]

Changing this bug to capture addition of the new pixelStorei parameters, which are needed both for 3D texture support as well as sub-rectangle texture uploads new in WebGL 2.0.

[Kenneth Russell]

Handling of WebGL 2.0's pixelStorei parameters, and uploading of DOM content to 3D textures, had to be folded in to the fix for Bug 210766 in order to be able to validate that fix by passing a large number of additional WebGL 2.0 conformance tests.

Changing this bug's synopsis to cover completion of the remaining new texture upload entry points in WebGL2RenderingContext. This is a separable piece of work.

[Kenneth Russell]

Justin, let me take this bug from you. Examining the current texture-related code, there are several missing pieces here and there that aren't that easily separable, and will be best found via a code audit.

[Kenneth Russell]

Created attachment 398581 [details]
Patch

[Kenneth Russell]

Created attachment 398640 [details]
Patch

[Kenneth Russell]

Created attachment 398648 [details]
Patch

[Kenneth Russell]

Created attachment 398652 [details]
Patch

[Kenneth Russell]

The current patch looks like it will pass the EWS. Per the ChangeLogs, it roughly does the following:

- Supports the TEXTURE_3D and TEXTURE_2D_ARRAY binding points.
- Supports the PIXEL_UNPACK_BUFFER binding point.
- Implements all of the 3D texture uploading entry points, hooking them up to the lower levels refactored in Bug 210766.

In support of these changes, it also:

- Refactors the WebGL 2.0-specific binding points into WebGL2RenderingContext, where they were previously mixed into WebGLRenderingContextBase.
- Refactors getParameter, some other get* calls, and associated validation into WebGLRenderingContextBase, overridden as appropriate in WebGL2RenderingContext.
- Other necessary changes along these call trees.

This patch makes all of the 3D texture tests - the remaining failures in the webgl/2.0.0/conformance2/textures/canvas_sub_rectangle/ and webgl/2.0.0/conformance2/textures/image_data/ directories - pass completely. It also progresses several other WebGL conformance tests, making some also pass completely.

[Dean Jackson]

Comment on attachment 398652 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=398652&action=review

> Source/WebCore/html/canvas/WebGL2RenderingContext.cpp:964
> +    case GraphicsContextGL::TEXTURE_BASE_LEVEL:
> +        FALLTHROUGH;
> +    case GraphicsContextGL::TEXTURE_MAX_LEVEL:
> +        FALLTHROUGH;
> +    case GraphicsContextGL::TEXTURE_COMPARE_FUNC:
> +        FALLTHROUGH;
> +    case GraphicsContextGL::TEXTURE_COMPARE_MODE:
> +        FALLTHROUGH;
> +    case GraphicsContextGL::TEXTURE_IMMUTABLE_LEVELS:
> +        FALLTHROUGH;

I thought you only had to put FALLTHROUGH if you also had content in the case block?

> Source/WebCore/html/canvas/WebGL2RenderingContext.cpp:976
> +    case GraphicsContextGL::TEXTURE_MIN_LOD:
> +        FALLTHROUGH;

Ditto.

[Kenneth Russell]

Comment on attachment 398652 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=398652&action=review

>> Source/WebCore/html/canvas/WebGL2RenderingContext.cpp:964
>> +        FALLTHROUGH;
> 
> I thought you only had to put FALLTHROUGH if you also had content in the case block?

Ah, thanks - was wondering why leaving this out didn't cause compile/style failures. Will clean up later.

[EWS]

Committed r261413: <https://trac.webkit.org/changeset/261413>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 398652 [details].

[Radar WebKit Bug Importer]

<rdar://problem/63034628>