1e5c31af7Sopenharmony_ci------------------------------------------------------------------------- 2e5c31af7Sopenharmony_cidrawElements Quality Program Test Specification 3e5c31af7Sopenharmony_ci----------------------------------------------- 4e5c31af7Sopenharmony_ci 5e5c31af7Sopenharmony_ciCopyright 2014 The Android Open Source Project 6e5c31af7Sopenharmony_ci 7e5c31af7Sopenharmony_ciLicensed under the Apache License, Version 2.0 (the "License"); 8e5c31af7Sopenharmony_ciyou may not use this file except in compliance with the License. 9e5c31af7Sopenharmony_ciYou may obtain a copy of the License at 10e5c31af7Sopenharmony_ci 11e5c31af7Sopenharmony_ci http://www.apache.org/licenses/LICENSE-2.0 12e5c31af7Sopenharmony_ci 13e5c31af7Sopenharmony_ciUnless required by applicable law or agreed to in writing, software 14e5c31af7Sopenharmony_cidistributed under the License is distributed on an "AS IS" BASIS, 15e5c31af7Sopenharmony_ciWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16e5c31af7Sopenharmony_ciSee the License for the specific language governing permissions and 17e5c31af7Sopenharmony_cilimitations under the License. 18e5c31af7Sopenharmony_ci------------------------------------------------------------------------- 19e5c31af7Sopenharmony_ci Mipmapping tests 20e5c31af7Sopenharmony_ci 21e5c31af7Sopenharmony_ciTests: 22e5c31af7Sopenharmony_ci + dEQP-GLES3.functional.texture.mipmap.* 23e5c31af7Sopenharmony_ci 24e5c31af7Sopenharmony_ciIncludes: 25e5c31af7Sopenharmony_ci + All mipmap filtering modes 26e5c31af7Sopenharmony_ci + Lod computation verification 27e5c31af7Sopenharmony_ci + Affine and projected transforms 28e5c31af7Sopenharmony_ci + User-supplied bias to texture lookup 29e5c31af7Sopenharmony_ci + Lod controls: min and max lod 30e5c31af7Sopenharmony_ci + 2D and cube map textures 31e5c31af7Sopenharmony_ci 32e5c31af7Sopenharmony_ciExcludes: 33e5c31af7Sopenharmony_ci + Only selected texture formats are exercised 34e5c31af7Sopenharmony_ci 35e5c31af7Sopenharmony_ciDescription: 36e5c31af7Sopenharmony_ci 37e5c31af7Sopenharmony_ciMipmapping tests render a pre-defined grid of quads. For 2D textures regular 38e5c31af7Sopenharmony_ci4x4 grid layout is used. For cube map textures the viewport is recursively 39e5c31af7Sopenharmony_cisubdivided into smaller areas and each is filled with samples from single 40e5c31af7Sopenharmony_cicube face. 41e5c31af7Sopenharmony_ci 42e5c31af7Sopenharmony_ciEach texture level is filled with single color. However, each mipmap level 43e5c31af7Sopenharmony_cigets assigned a different color from a continuous gradient. Thus it is possible 44e5c31af7Sopenharmony_cito evaluate how accurately the lod was computed by inspecting the resulting 45e5c31af7Sopenharmony_cicolorbuffer. 46e5c31af7Sopenharmony_ci 47e5c31af7Sopenharmony_ciOpenGL ES specification allows approximating both derivate- and lod computation. 48e5c31af7Sopenharmony_ciThus two reference images are rendered: one rendered according to the minimum 49e5c31af7Sopenharmony_cibound for the approximation and another based on the maximum bound. The rendered 50e5c31af7Sopenharmony_cipixels must be in between the two bounds in order to be valid. In order to 51e5c31af7Sopenharmony_cicompensate the derivate approximation the pixels are actually checked against 52e5c31af7Sopenharmony_cia 3x3 neighbor around the pixel. 53