| ------------------------------------------------------------------------- |
| drawElements Quality Program Test Specification |
| ----------------------------------------------- |
| |
| Copyright 2014 The Android Open Source Project |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ------------------------------------------------------------------------- |
| Texture unit usage tests |
| |
| Tests: |
| + dEQP-GLES2.functional.texture.units.* |
| |
| Includes: |
| + Use of multiple units simultaneously: |
| - 1, 2, 4, 8 |
| - all available |
| + Mixed texture formats |
| + Mixed texture types |
| + Mixed texture parameters |
| |
| Description: |
| |
| For each texture unit a 2D or cube map texture is generated. Shader samples all |
| textures and adds scaled lookup values together to yield a value in range 0..1 |
| for each output component. |
| |
| For each texture a separate coordinate array is generated, yielding different |
| sample points. Simple quad is rendered with a fragment shader that adds texture |
| lookup results together. Resulting image is compared against a reference image |
| produced by a reference renderer. |
