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drawElements Quality Program Test Specification
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Copyright 2014 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
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    Opaque Type Indexing

Tests:
 + dEQP-GLES31.functional.shaders.opaque_type_indexing.*

Includes:
 + Indexing of sampler arrays
   - all sampler types
   - single sampler array
   - 1x1 texture per unit, unique color per texture
 + Indexing of Uniform Block instance arrays
   - single uint var in each block
 + Indexing of SSBO instance arrays
   - single uint var in each block
   - read only
 + Indexing of atomic counter arrays
   - single array
 + Vertex, fragment and compute shaders
 + Indexing with constant literals
 + Indexing with uniform values (XXX_gpu_shader5)
 + Indexing with dynamically uniform values (XXX_gpu_shader5)

Excludes (will be added later):
 + SSBO writes, atomic ops, unsized array length queries
 + Different texture sizes and filtering modes
 + Indexing inside complex control flow (loop iterator var)
 + Indexing with non-trivial constant expressions
 + Negative tests

Description:

Opaque type indexing tests generate a shader that does multiple reads from a
specific opaque type array. The indexing expression depends on the test case
type. Constant literal cases simply index with constant literal values,
uniform cases with values read directly from a list of uniforms, and
dynamically uniform cases using attribute/varying/SSBO variables depending on
the shader type.

Results from the indexing operations are collected using transform feedback,
fragment shader outputs, or written into a SSBO depending on the shader type.
Results are validated against reference values.