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 Instanced rendering tests 20 21 Tests: 22 + dEQP-GLES3.functional.instanced.* 23 24 Includes: 25 + Draw using: 26 - glDrawArraysInstanced() 27 - glDrawElementsInstanced() 28 + Do instancing using: 29 - gl_InstanceID vertex shader input 30 - glVertexAttribDivisor() 31 - Mixture of the above 32 + Instance counts 1, 2, 4, 20 33 + Instanced attribute tests with different types 34 35 Description: 36 37 For each instance a rectangle-shaped grid of triangles is drawn. Instanced 38 variables are rectangle offset and color components R, G and B. Offsets are 39 chosen such that the rectangles are drawn next to each other. 40 41 In the cases that test draw function, instancing method and instance count, the 42 instance variables are either calculated based on gl_InstanceID in the vertex 43 shader or given to the vertex shader as attributes instanced with 44 glVertexAttribDivisor(). In a mixed case different methods are used for 45 different variables. Instanced attributes are of type float, except for the 46 offset attribute, which is of type vec3. 47 48 In the tests for instanced attribute types, only the vertex attribute divisor 49 method is used. The instanced attributes for color components R, G and B are 50 all int, uint, float or corresponding vectors, or matrices. The instance offset 51 attribute is of type vec3. In these cases, draw function and instance count are 52 fixed to glDrawArraysInstanced() and 4, respectively. 53 54 In all cases, the resulting image is compared against a reference image 55 produced by a reference renderer. 56
