| # 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. |
| |
| [require] |
| geometryShader |
| |
| [vertex shader] |
| #version 430 |
| |
| layout(location = 0) in vec4 position; |
| layout(location = 1) in vec4 vert_color; |
| layout(location = 0) out vec4 geom_color; |
| |
| void main() { |
| gl_Position = position; |
| geom_color = vert_color; |
| } |
| |
| [geometry shader] |
| #version 430 |
| |
| layout (points) in; |
| layout (triangle_strip, max_vertices = 6) out; |
| |
| layout(location = 0) in vec4 geom_color[]; |
| |
| layout(location = 0) out vec4 frag_color; |
| |
| void |
| main() |
| { |
| gl_Position = gl_in[0].gl_Position; |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| |
| gl_Position = vec4(gl_in[0].gl_Position.x + 1.0, |
| gl_in[0].gl_Position.y + 1.0, |
| 0.0, 1.0); |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| EndPrimitive(); |
| |
| gl_Position = vec4(gl_in[0].gl_Position.x, |
| gl_in[0].gl_Position.y + 1.0, |
| 0.0, 1.0); |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| |
| gl_Position = gl_in[0].gl_Position; |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| |
| gl_Position = vec4(gl_in[0].gl_Position.x + 1.0, |
| gl_in[0].gl_Position.y + 1.0, |
| 0.0, 1.0); |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| |
| gl_Position = vec4(gl_in[0].gl_Position.x + 1.0, |
| gl_in[0].gl_Position.y, |
| 0.0, 1.0); |
| frag_color = geom_color[0]; |
| EmitVertex(); |
| } |
| |
| [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 vert_color |
| 0/R8G8_SNORM 1/R8G8B8_UNORM |
| |
| # Red for left-top quarter frame |
| # R8 G8 R8 G8 B8 |
| -128 -128 255 0 0 |
| |
| # Green for right-top quarter frame |
| # R8 G8 R8 G8 B8 |
| 0 -128 0 255 0 |
| |
| # Blue for left-bottom quarter frame |
| # R8 G8 R8 G8 B8 |
| -128 0 0 0 255 |
| |
| # Mixed color for quarter frame |
| # R8 G8 R8 G8 B8 |
| 0 0 128 128 128 |
| |
| [test] |
| clear |
| |
| draw arrays POINT_LIST 0 4 |
| relative probe rect rgb (0.0, 0.0, 0.5, 0.5) (1.0, 0, 0) |
| relative probe rect rgb (0.5, 0.0, 0.5, 0.5) (0, 1.0, 0) |
| relative probe rect rgb (0.0, 0.5, 0.5, 0.5) (0, 0, 1.0) |
| relative probe rect rgb (0.5, 0.5, 0.5, 0.5) (0.5, 0.5, 0.5) |