1 ------------------------------------------------------------------------- 2 drawElements Quality Program Test Specification 3 ----------------------------------------------- 4 5 Copyright 2014 The Android Open Source Project 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 ------------------------------------------------------------------------- 19 Shader Shared Variable Tests 20 21 Tests: 22 + dEQP-GLES31.functional.compute.shared_var.* 23 24 Includes: 25 + All basic types, all precisions 26 + Single shared variable 27 + Various work group sizes 28 - 2x1x3 in basic type cases 29 - 1x1x1, 64x1x1, 1x64x1, 1x1x64, 256x1x1, 1x256x1, 17x5x9 for selected types 30 + All built-in atomic operation functions 31 + int, uint types 32 + all precisions 33 + Multiple work groups for atomic function cases 34 35 Excludes: 36 + Multiple shared variables 37 + Complex types (arrays, structures) 38 + Negative tests 39 40 Description: 41 42 Basic type test cases declare a single shared variable of the appropriate 43 type. In addition following input/output variables are used: 44 + buffer block containing an array of booleans, one for each item in work group 45 + u_val[], u_ref[] uniform arrays, filled with identical values 46 + u_numIters iteration count uniform, initialized with work group size 47 48 The compute shader contains a loop that is limited by the u_numIters uniform. 49 In each iteration one of the work items writes a value from u_val to the 50 shared variable. A shared memory barrier is issued, and after that all work 51 items read and compare shared var value to u_ref. If comparison passed for all 52 iterations, true is set to appropriate element of the output array. Test case 53 then maps the output SSBO and checks that all elements are true, meaning that 54 all shader invocations passed the test. 55 56 57 Atomic operation test cases issue multiple work groups of size 3x2x1. In each 58 work group first invocation initializes shared variable to a certain value. 59 Barrier is issued and after that each invocation issues atomic operation with 60 per-invocation value. Resulting values are written out into SSBO. Finally, one 61 invocation per work group writes out the final shared variable value. 62 63 Resulting values from SSBO are read using buffer mapping and verified. The 64 input values and validation logic depends on the type of the atomic operation. 65
