1------------------------------------------------------------------------- 2drawElements Quality Program Test Specification 3----------------------------------------------- 4 5Copyright 2014 The Android Open Source Project 6 7Licensed under the Apache License, Version 2.0 (the "License"); 8you may not use this file except in compliance with the License. 9You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13Unless required by applicable law or agreed to in writing, software 14distributed under the License is distributed on an "AS IS" BASIS, 15WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16See the License for the specific language governing permissions and 17limitations under the License. 18------------------------------------------------------------------------- 19 GLSL discard statement 20 21Tests: 22 + dEQP-GLES2.functional.shaders.discard.* 23 24Includes: 25 + Unconditional discard 26 + Conditional discard with compile-time false condition 27 + Conditional discard based on uniform value 28 + Conditional discard based on varying value 29 + Conditional discard based on texture lookup result 30 + Discard in main() 31 + Discard in user-defined function 32 + Discard inside static for loop 33 + Discard inside uniform for loop 34 + Discard inside static loop in user-defined function 35 36Excludes: 37 + Effects on depth buffer values 38 + Discard when rendering lines and points 39 40Description: 41 42Two triangles forming a quad is rendered with a fragment shader that 43exercises the GLSL discard statement. A reference image is rendered 44using a simple C function that implements the same discard condition. 45Results are checked by reading the pixels and comparing image against 46the reference. 47