1*35238bceSAndroid Build Coastguard Worker------------------------------------------------------------------------- 2*35238bceSAndroid Build Coastguard WorkerdrawElements Quality Program Test Specification 3*35238bceSAndroid Build Coastguard Worker----------------------------------------------- 4*35238bceSAndroid Build Coastguard Worker 5*35238bceSAndroid Build Coastguard WorkerCopyright 2014 The Android Open Source Project 6*35238bceSAndroid Build Coastguard Worker 7*35238bceSAndroid Build Coastguard WorkerLicensed under the Apache License, Version 2.0 (the "License"); 8*35238bceSAndroid Build Coastguard Workeryou may not use this file except in compliance with the License. 9*35238bceSAndroid Build Coastguard WorkerYou may obtain a copy of the License at 10*35238bceSAndroid Build Coastguard Worker 11*35238bceSAndroid Build Coastguard Worker http://www.apache.org/licenses/LICENSE-2.0 12*35238bceSAndroid Build Coastguard Worker 13*35238bceSAndroid Build Coastguard WorkerUnless required by applicable law or agreed to in writing, software 14*35238bceSAndroid Build Coastguard Workerdistributed under the License is distributed on an "AS IS" BASIS, 15*35238bceSAndroid Build Coastguard WorkerWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16*35238bceSAndroid Build Coastguard WorkerSee the License for the specific language governing permissions and 17*35238bceSAndroid Build Coastguard Workerlimitations under the License. 18*35238bceSAndroid Build Coastguard Worker------------------------------------------------------------------------- 19*35238bceSAndroid Build Coastguard Worker Mipmapping tests 20*35238bceSAndroid Build Coastguard Worker 21*35238bceSAndroid Build Coastguard WorkerTests: 22*35238bceSAndroid Build Coastguard Worker + dEQP-GLES3.functional.texture.mipmap.* 23*35238bceSAndroid Build Coastguard Worker 24*35238bceSAndroid Build Coastguard WorkerIncludes: 25*35238bceSAndroid Build Coastguard Worker + All mipmap filtering modes 26*35238bceSAndroid Build Coastguard Worker + Lod computation verification 27*35238bceSAndroid Build Coastguard Worker + Affine and projected transforms 28*35238bceSAndroid Build Coastguard Worker + User-supplied bias to texture lookup 29*35238bceSAndroid Build Coastguard Worker + Lod controls: min and max lod 30*35238bceSAndroid Build Coastguard Worker + 2D and cube map textures 31*35238bceSAndroid Build Coastguard Worker 32*35238bceSAndroid Build Coastguard WorkerExcludes: 33*35238bceSAndroid Build Coastguard Worker + Only selected texture formats are exercised 34*35238bceSAndroid Build Coastguard Worker 35*35238bceSAndroid Build Coastguard WorkerDescription: 36*35238bceSAndroid Build Coastguard Worker 37*35238bceSAndroid Build Coastguard WorkerMipmapping tests render a pre-defined grid of quads. For 2D textures regular 38*35238bceSAndroid Build Coastguard Worker4x4 grid layout is used. For cube map textures the viewport is recursively 39*35238bceSAndroid Build Coastguard Workersubdivided into smaller areas and each is filled with samples from single 40*35238bceSAndroid Build Coastguard Workercube face. 41*35238bceSAndroid Build Coastguard Worker 42*35238bceSAndroid Build Coastguard WorkerEach texture level is filled with single color. However, each mipmap level 43*35238bceSAndroid Build Coastguard Workergets assigned a different color from a continuous gradient. Thus it is possible 44*35238bceSAndroid Build Coastguard Workerto evaluate how accurately the lod was computed by inspecting the resulting 45*35238bceSAndroid Build Coastguard Workercolorbuffer. 46*35238bceSAndroid Build Coastguard Worker 47*35238bceSAndroid Build Coastguard WorkerOpenGL ES specification allows approximating both derivate- and lod computation. 48*35238bceSAndroid Build Coastguard WorkerThus two reference images are rendered: one rendered according to the minimum 49*35238bceSAndroid Build Coastguard Workerbound for the approximation and another based on the maximum bound. The rendered 50*35238bceSAndroid Build Coastguard Workerpixels must be in between the two bounds in order to be valid. In order to 51*35238bceSAndroid Build Coastguard Workercompensate the derivate approximation the pixels are actually checked against 52*35238bceSAndroid Build Coastguard Workera 3x3 neighbor around the pixel. 53