commit 0224ae2d32f0ce0dcd38dd7ac70440f91ca73bc1
author Andres Gomez <agomez@igalia.com> Tue Dec 20 19:25:46 2016 +0200
committer Alexander Galazin <Alexander.Galazin@arm.com> Fri Feb 24 11:50:30 2017 -0500
tree 4ba74564d2fff6f2e863aab687cb27a7eb199aba
parent 629518ebe1816de7710ae43283d86f4c4e444fd0

Unsized array of arrays in shader storage block

From the GL_ARB_arrays_of_arrays spec:

   "For unsized arrays, only the outermost dimension can be lacking a
    size. A type that includes an unknown array size cannot be formed
    into an array until it gets an explicit size."

This is later further detailed as per OpenGL® Shading Language 4.40.

From page 3 (page 9 of the PDF) of the GLSL 4.00 v9 spec:

  "* Bug 11987: Allow array-of-array constructors and initialized
     variables to have any dimension unsized (not just the outer
     dimension) and get their size from the content of the constructor
     or initializer."

From page 37 (page 43 of the PDF) of the GLSL 4.00 v9 spec:

  " vec4 a[][] = { vec4[2](vec4(0.0), vec4(1.0)), // okay, size to
                   vec4[2](vec4(0.0), vec4(1.0)), //       a[3][2]
                   vec4[2](vec4(0.0), vec4(1.0)) };"

From page 38 (page 44 of the PDF) of the GLSL 4.00 v9 spec:

  "For implicitly-sized or run-time-sized arrays, only the outermost
   dimension can be lacking a size. A type that includes an unknown
   array size cannot be formed into an array until it gets an explicit
   size, except for shader storage blocks where the only unsized array
   member is the last member of the block."

Hence, in the absence of a constructor/initializer, unsized arrays are
only allowed for the outermost dimension of an AoA.

Affects:

GL43-CTS.arrays_of_arrays_gl.InteractionStorageBuffers3

Components: OpenGL
VK-GL-CTS issue: 145

Change-Id: Ic751b3ff52a84e3aee604552edf9441211890a11