motionvector.frag - mozsearch

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// Copyright (C) 2025 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#version 440

layout (location = 0) in vec4 vPosition;

layout (location = 1) in vec4 vPrevPosition;

layout (location = 0) out vec4 fragColor;

layout (std140, binding = 0) uniform buf {

    mat4 mvp;

    mat4 prevMVP;

    mat4 instanceLocal;

    mat4 instanceGlobal;

    mat4 prevInstanceLocal;

    mat4 prevInstanceGlobal;

    vec4 currentAndLastJitter;

    float velocityAmount;

    int morphTargetCount;

    vec2 padding;

} ubuf;

void main()

    vec2 a = (vPosition.xy / vPosition.w);

    vec2 b = (vPrevPosition.xy / vPrevPosition.w);

    a -= ubuf.currentAndLastJitter.zw;

    b -= ubuf.currentAndLastJitter.xy;

    a = a * 0.5 - 0.5;

    b = b * 0.5 - 0.5;

    vec2 v;

    v.x = b.x - a.x;

    #if defined(QSHADER_HLSL) || defined(QSHADER_MSL)

        v.y = b.y - a.y;

    #else

        v.y = a.y - b.y;

    #endif

    fragColor = vec4(v * ubuf.velocityAmount, v);