| ------------------------------------------------------------------------- |
| drawElements Quality Program Test Specification |
| ----------------------------------------------- |
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| 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. |
| ------------------------------------------------------------------------- |
| Single vertex attribute vertex array tests |
| |
| Tests: |
| + dEQP-GLES2.functional.vertex_arrays.single_attribute.* |
| |
| Includes: |
| + Rendering with different strides from buffer and user pointer. |
| + Attribute normalization with different types and component counts. |
| + Passing attributes to vec2, vec3 and vec4. |
| + Using buffers with different usage. |
| + Buffer attributes with different offsets. |
| |
| Excludes: |
| + Buffer data modifications |
| + Stride less than types own size |
| + Robustness with nan or inf |
| + Index buffers or glDrawElements |
| + Different first values for glDrawArrays |
| |
| Description: |
| |
| Testcases generate data that defines quads in testcase specifig format. |
| This takes account stride, offsets and other parameters. Input types must |
| have two or more components to form distinct coordinates. First two components |
| are coordinates and six subsequent attributes form two triangles which define a |
| quad. Third and fourth component are same for each vertex in quad. |
| This data is uploaded to buffer or used from user pointer while rendering. |
| Rendering uses simple shader that takes first two components and adds |
| first to third component and second to fourth component if more than |
| two components are used. First and third component are used as x coordinate |
| and second and fourth as y. These values are also scaled to range from -1.0 to 1.0. |
| Test renders only once and result is checked against reference implementations result. |
| |
| Stride tests render different input type and component count combinations from buffer |
| and user pointer. Stride testcases test npot and pot strides and types real size as stride. |
| Data is passed to shader as vec4. |
| |
| Normalization is tested with different input types and component counts. User |
| pointers are used as source for data and vec4 is used in shaders. |
| |
| Output type tests pass different input types to different vector types in shader. |
| Also different input type and output type component counts are tested. Data is used |
| from user pointer. |
| |
| Usage testcases test buffers with different usage parameters with different strides |
| and different sized types. The data is used as vec2 in shaders. |