| # Copyright 2019 The Amber Authors. |
| # |
| # 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; |
| layout(location = 0) out vec4 frag_color; |
| |
| void main() { |
| const vec4 color[4] = |
| { vec4(1.,0.,0.,1.), |
| vec4(0.,1.,0.,1.), |
| vec4(0.,0.,1.,1.), |
| vec4(1.,0.,1.,1.)}; |
| |
| const vec4 pos[4] = |
| { vec4(0. ,0. ,0. ,0. ), |
| vec4(0. ,1. ,0. ,0.), |
| vec4(1., 0., 0., 0), |
| vec4(1. ,1.,0., 0.)}; |
| |
| gl_Position = position + pos[gl_InstanceIndex % 4]; |
| frag_color = color[gl_InstanceIndex % 4]; |
| } |
| |
| [fragment shader] |
| #version 430 |
| |
| layout(location = 0) in vec4 frag_color; |
| layout(location = 0) out vec4 final_color; |
| |
| void main() { |
| final_color = frag_color; |
| } |
| |
| [vertex data] |
| # position |
| 0/R8G8_SNORM |
| |
| # Quarter frame |
| # R8 G8 |
| -128 -128 |
| 0 -128 |
| 0 0 |
| |
| -128 -128 |
| -128 0 |
| 0 0 |
| |
| [test] |
| clear |
| |
| draw arrays instanced TRIANGLE_LIST 0 6 4 |
| relative probe rect rgba (0.0, 0.0, 0.5, 0.5) (1.0, 0.0, 0.0, 1.0) |
| relative probe rect rgba (0.5, 0.0, 0.5, 0.5) (0.0, 0.0, 1.0, 1.0) |
| relative probe rect rgba (0.0, 0.5, 0.5, 0.5) (0.0, 1.0, 0.0, 1.0) |
| relative probe rect rgba (0.5, 0.5, 0.5, 0.5) (1.0, 0.0, 1.0, 1.0) |