[Webkit-unassigned] [Bug 133561] New: WEBGL_compressed_texture_pvrtc doesn't accept PVRTC format enums in compressedTexImage2D

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133561

           Summary: WEBGL_compressed_texture_pvrtc doesn't accept PVRTC
                    format enums in compressedTexImage2D
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: iOS
               URL: http://floooh.github.io/oryol/DDSTextureLoading.html
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: floooh at gmail.com


The URL (http://floooh.github.io/oryol/DDSTextureLoading.html) points to an emscripten/WebGL demo which tries to load several texture formats. The upper row loads 3 DXT formats (on platforms supporting DXT), and 2 PVRTC formats (on platforms exposing the PVRTC GL extensions). On iOS8 Safari an error message is printed to the JS console "WebGL: INVALID_ENUM: compressedTexImage2D: invalid internalformat" when trying to create the PVRTC textures for the format codes 0x8C02 (GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG) and 0x8C03 (GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG).

Here's another page which crashes when trying to load PVRTC textures:

http://toji.github.io/texture-tester/

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