SPDX-FileCopyrightText: 2025 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#version 440
layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 fragColor;
layout(std140, binding = 0) uniform buf {
mat4 qt_Matrix;
float qt_Opacity;
vec2 tilt;
} ubuf;
layout(binding = 1) uniform sampler2D uSource1;
layout(binding = 2) uniform sampler2D uSource2;
void main()
{
float f = dot(ubuf.tilt, vTexCoord - vec2(0.5, 0.5));
float df = length(vec2(dFdx(f), dFdy(f)));
float blending = clamp(0.5 + f / df, 0.0, 1.0);
vec4 p1 = texture(uSource1, vTexCoord);
vec4 p2 = texture(uSource2, vTexCoord);
fragColor = mix(p1, p2, blending) * ubuf.qt_Opacity;
}
