external/openglcts/docs/specs/CTS_ARB_shader_viewport_layer_array.txt

Conformance Test

    CTS_ARB_shader_viewport_layer_array

Contributors

    Filip Demczewski, Mobica

Contacts

    Filip Demczewski, Mobica (filip.demczewski 'at' mobica.com)

Status

    In review

Version

    December 13, 2016 (version 1)

Dependencies

    OpenGL 4.1 is required.

    ARB_shader_viewport_layer_array extension is required.

    This specification is written against:
      - ARB_shader_viewport_layer_array specification,
      - OpenGL 4.5 (core) specification.

Overview

    This tests verifies if functionality provided by ARB_shader_viewport_layer_array
    works as expected:

      * Verify if gl_Layer and gl_ViewportIndex outputs can be written directly from
        vertex and tessalation shaders

New Tests

    gl_ViewportIndex test

      * Create multiple viewports (MAX_VIEWPORTS)
        Iterate through all supported shader pipelines
        a) vertex + fragment
        b) vertex + tcs + tes + fragment
        c) vertex + tcs + tes + geometry + fragment
            Render primitive for each viewport with different output color.
            Validate output color for each viewport.
            Make sure that viewport index is taken from the gl_ViewportIndex output
            of the last active vertex processing stage.

    gl_Layer test

      * Create framebuffer with multiple layers
        Iterate through all supported shader pipelines
        a) vertex + fragment
        b) vertex + tcs + tes + fragment
        c) vertex + tcs + tes + geometry + fragment
            Render primitive for each layer with different output color.
            Validate output color for each layer.
            Make sure that layer is taken from the gl_Layer output
            of the last active vertex processing stage.
            Make sure that the layer number written by a vertex procesing
            shader has no effect if the framebuffer is not layered.

Revision History

    Revision 1, 13 December, 2016 (Filip Demczewski)
      - Intial version;