1------------------------------------------------------------------------- 2drawElements Quality Program Test Specification 3----------------------------------------------- 4 5Copyright 2014 The Android Open Source Project 6 7Licensed under the Apache License, Version 2.0 (the "License"); 8you may not use this file except in compliance with the License. 9You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13Unless required by applicable law or agreed to in writing, software 14distributed under the License is distributed on an "AS IS" BASIS, 15WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16See the License for the specific language governing permissions and 17limitations under the License. 18------------------------------------------------------------------------- 19 Shader Storage Buffer Object / Buffer Block Tests 20 21Tests: 22 + dEQP-GLES31.functional.ssbo.* 23 24Includes: 25 + SSBO access from compute shaders 26 + Basic SSBO usage 27 - Binding and unbinding uniform buffers 28 - Writing uniform buffer data with glBufferData() 29 + Binding SSBOs to buffer blocks 30 - glBindBufferRange() 31 - glBindBufferBase() 32 - glShaderStorageBlockBinding() 33 + Querying buffer block memory layout 34 + Layout sanity verification 35 + std140 and std430 layout verification 36 + Buffer blocks GLSL 37 - Basic scalar, vector and matrix types in buffer blocks 38 - Samplers in buffer blocks - as negative case! 39 - Structures and arrays in buffer blocks 40 - Buffer block instance names 41 - Buffer block arrays 42 - Unsized arrays as a last element of buffer block 43 - Layout qualifiers: shared, packed, std140, row_major, column_major 44 - Unused variables in buffer blocks 45 * Atomic operations 46 47Excludes: 48 + Access from other shader shader stages (currently compute only) 49 + Negative tests 50 51Description: 52 53SSBO layout and access tests generate compute shader code based on interface 54declaration. Shader is compiled and layout is queried. Validity checks are 55performed to the layout, and in case of std140 and std430 layouts the layout 56is compared against a full reference layout. 57 58Single compute shader invocation is issued. Shader reads and/or writes to 59SSBO. Reads are validated by comparing values to constant values declared in 60shader text. Writes are validated by reading back the SSBO and comparing 61against expected values. 62 63Atomic operation test cases use a single SSBO for both input data, output data 64and data operated with atomic memory functions. Multiple work groups of size 653x2x1 is issued and each invocation executes atomic operation with per- 66invocation data. Result values are then stored into SSBO. Results are 67validated by mapping buffer and doing comparison that varies per function. The 68input values are chosen so that comparison can detect obvious non-atomic 69behavior. 70