diff options
Diffstat (limited to 'src/quickcontrols/material/shaders/RectangularGlow.frag')
-rw-r--r-- | src/quickcontrols/material/shaders/RectangularGlow.frag | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/quickcontrols/material/shaders/RectangularGlow.frag b/src/quickcontrols/material/shaders/RectangularGlow.frag new file mode 100644 index 0000000000..50188d4516 --- /dev/null +++ b/src/quickcontrols/material/shaders/RectangularGlow.frag @@ -0,0 +1,31 @@ +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#version 440 + +layout(location = 0) in vec2 qt_TexCoord0; +layout(location = 0) out vec4 fragColor; + +layout(std140, binding = 0) uniform buf { + mat4 qt_Matrix; + float qt_Opacity; + float relativeSizeX; + float relativeSizeY; + float spread; + vec4 color; +} ubuf; + +float linearstep(float e0, float e1, float x) +{ + return clamp((x - e0) / (e1 - e0), 0.0, 1.0); +} + +void main() +{ + float alpha = + smoothstep(0.0, ubuf.relativeSizeX, 0.5 - abs(0.5 - qt_TexCoord0.x)) * + smoothstep(0.0, ubuf.relativeSizeY, 0.5 - abs(0.5 - qt_TexCoord0.y)); + + float spreadMultiplier = linearstep(ubuf.spread, 1.0 - ubuf.spread, alpha); + fragColor = ubuf.color * ubuf.qt_Opacity * spreadMultiplier * spreadMultiplier; +} |