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 Occlusion query tests 20 21 Tests: 22 + dEQP-GLES3.functional.occlusion_query.* 23 24 Includes: 25 + Following occluder types are tested: 26 - Scissor boxes 27 - Depth writes and clears 28 - Stencil writes and clears 29 + Exact occlusion query result verification 30 - For query target ANY_SAMPLES_PASSED 31 + Conservative occlusion query result verification 32 - For query target ANY_SAMPLES_PASSED_CONSERVATIVE 33 34 Excludes: 35 36 Description: 37 38 Occlusion query tests operate using the following steps. First, a number 39 of occluders are drawn on screen. Occluders can be areas around scissor 40 boxes, depth writes/clears or stencil writes/clears. Second, a number of 41 target primitives are drawn in red. If any target is visible, i.e. red 42 color appears in the framebuffer, the occlusion query should return true. 43 If targets are invisible, i.e. red color does not appear in the 44 framebuffer, the occlusion query should return false. If these conditions 45 are not met, the test fails. 46 47 If the occlusion query target is ANY_SAMPLES_PASSED_CONSERVATIVE, the test 48 allows false positives, i.e. the occlusion query can return true even if 49 red color is not present in the framebuffer. The converse is not allowed: 50 if red color is present in the framebuffer, the query must return true. 51
