[Webkit-unassigned] [Bug 133636] New: iOS WebGL getParameter hardcoded limits

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133636

           Summary: iOS WebGL getParameter hardcoded limits
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: iOS
               URL: http://codeflow.org/entries/2014/jun/08/some-issues-wi
                    th-apples-ios-webgl-implementation/
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pyalot at gmail.com
                CC: dino at apple.com, pyalot at gmail.com


Several capabilities seem to exhibit hardcoded limits, namely:

- MAX_COMBINED_TEXTURE_IMAGE_UNITS (WebGL=8, iPad mini retina native=32)
- MAX_TEXTURE_IMAGE_UNITS (WebGL=8, iPad mini retina native=16)
- MAX_VERTEX_TEXTURE_IMAGE_UNITS (WebGL=8, iPad mini retina native=16)
- MAX_FRAGMENT_UNIFORM_VECTORS (WebGL=64, iPad mini retina native=224)
- MAX_VERTEX_UNIFORM_VECTORS (WebGL=128, iPad mini retina native=512)
- MAX_VARYING_VECTORS (WebGL=8, iPad mini retina native=15)

These limits match iPod touch 5th gen limitations, but they are still reported back when running WebGL on an iPad mini retina, which has higher limits natively.

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