| # Copyright 2019 Google LLC. |
| # Copyright 2019 The Khronos Group Inc. |
| # |
| # 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 |
| # |
| # https://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. |
| |
| [vertex shader] |
| #version 430 |
| |
| layout(location = 0) in vec4 position_in; |
| layout(location = 1) in vec4 color_in; |
| layout(location = 0) flat out vec4 color_out; |
| |
| void main() { |
| gl_Position = position_in; |
| color_out = color_in; |
| } |
| |
| [fragment shader] |
| #version 430 |
| |
| layout(location = 0) flat in vec4 color_in; |
| layout(location = 0) out vec4 color_out; |
| |
| void main() { |
| color_out = color_in; |
| } |
| |
| [vertex data] |
| # Provoking vertices are all red. |
| 0/R32G32B32_SFLOAT 1/R8G8B8A8_UNORM |
| -1.0 -0.5 0.0 255 0 0 255 # line 0 |
| 1.0 -0.5 0.0 0 255 0 255 |
| -1.0 0.5 0.0 255 0 0 255 # line 1 |
| 1.0 0.5 0.0 0 255 0 255 |
| |
| [test] |
| # Clear color buffer to red and check the drawing doesn't |
| # add any other colors from non-provoking vertices. |
| clear color 255 0 0 255 |
| clear |
| draw arrays LINE_LIST 0 4 |
| probe all rgb 1.0, 0.0, 0.0 |