| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| uniform FrameInfo { |
| mat4 mvp; |
| vec4 color; |
| float size; |
| } frame_info; |
| |
| in vec2 vertex_position; |
| in vec2 vertex_normal; |
| in float pen_down; |
| |
| out vec4 stroke_color; |
| out float v_pen_down; |
| |
| void main() { |
| // Push one vertex by the half stroke size along the normal vector. |
| vec2 offset = vertex_normal * vec2(frame_info.size * 0.5); |
| gl_Position = frame_info.mvp * vec4(vertex_position + offset, 0.0, 1.0); |
| stroke_color = frame_info.color; |
| v_pen_down = pen_down; |
| } |
