51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
/**
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* @license
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* Copyright 2022 Google LLC. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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const PASSTHROUGH_VERTEX_SHADER = `#version 300 es
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precision highp float;
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in vec4 position;
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in vec4 input_tex_coord;
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out vec2 tex_coord;
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void main() {
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gl_Position = position;
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tex_coord = input_tex_coord.xy;
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}`;
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const MASK_SHADER = `#version 300 es
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precision mediump float;
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uniform sampler2D frame;
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uniform sampler2D mask;
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in highp vec2 tex_coord;
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out vec4 out_color;
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void main() {
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// The user-facing camera is mirrored, flip horizontally.
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vec2 coord = vec2(1.0 - tex_coord[0], tex_coord[1]);
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vec4 src_color = texture(frame, coord).rgba;
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float probability = texture(mask, coord).a;
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if (probability > 0.5) {
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out_color = vec4(src_color.rgb, 1.0);
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} else {
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vec4 purple = vec4(0.365, 0.247, 0.827, 1.0);
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out_color = 0.5 * purple + 0.5 * src_color;
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}
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}`
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