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aec29f869b
First pass at a Next Generation UI demo app. The UI needs work, feedback gratefully accepted. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/wiki/Chat [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md
69 lines
1.6 KiB
GLSL
69 lines
1.6 KiB
GLSL
// Copyright 2023 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#version 460 core
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#include "common/common.glsl"
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#include <flutter/runtime_effect.glsl>
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uniform vec2 uResolution;
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uniform float uTime;
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uniform sampler2D uTex;
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out vec4 oColor;
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float cubicPulse(float c, float w, float x) {
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x = abs(x - c);
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if (x > w)
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return 0.0;
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x /= w;
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return 1.0 - x*x*(3.0 - 2.0*x);
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}
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float twoSin(float x) {
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x = 6.49*x - 0.65;
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float t = -0.7*sin(6.8*x) + 1.4*sin(2.9*x);
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t = t/4.1 + 0.5;
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return t;
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}
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void main() {
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vec2 uv = vec2(FlutterFragCoord().xy) / uResolution;
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float t_2 = cubicPulse(.5, .05, fract(uTime / 4.0));
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float t_1 = twoSin(fract(uTime / 5.0));
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float glitchScale = mix(0.0, 8.0, t_1 + t_2);
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float aberrationSize = mix(0.0, 5.0, t_1 + t_2);
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float h = hash_1d(uv.y);
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float hs = sign(h);
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h = max(h, 0.0);
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h = h * h;
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h = round(h) * hs;
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uv += vec2(h * glitchScale, 0.0) / uResolution;
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vec2 redOffset = vec2(aberrationSize, 0.0) / uResolution;
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vec2 greenOffset = vec2(0.0, 0.0) / uResolution;
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vec2 blueOffset = vec2(-aberrationSize, 0.0) / uResolution;
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vec2 redUv = uv + redOffset;
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vec2 greenUv = uv + greenOffset;
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vec2 blueUv = uv + blueOffset;
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vec2 ra = texture(uTex, redUv).ra;
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vec2 ga = texture(uTex, greenUv).ga;
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vec2 ba = texture(uTex, blueUv).ba;
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// Convert from pre-multiplied alpha
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ra.x /= ra.y;
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ga.x /= ga.y;
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ba.x /= ba.y;
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float alpha = max(ra.y, max(ga.y, ba.y));
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oColor = vec4(ra.x, ga.x, ba.x, 1.0) * alpha;
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}
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