Qml倒影

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使用QtGraphicalEffects中的ShaderEffect

        ShaderEffect {            height: parent.height            width: parent.width            anchors.top: parent.bottom            anchors.left: parent.left            property variant source: img            property size sourceSize: Qt.size(0.5 / img.width, 0.5 / img.height)            fragmentShader: "                varying highp vec2 qt_TexCoord0;                uniform lowp sampler2D source;                uniform lowp vec2 sourceSize;                uniform lowp float qt_Opacity;                void main() {                    lowp vec2 tc = qt_TexCoord0 * vec2(1, -1) + vec2(0, 1);                    lowp vec4 col = 0.25 * (texture2D(source, tc + sourceSize)                                            + texture2D(source, tc- sourceSize)                                            + texture2D(source, tc + sourceSize * vec2(1, -1))                                            + texture2D(source, tc + sourceSize * vec2(-1, 1))                                           );                    gl_FragColor = col * qt_Opacity * (1.0 - qt_TexCoord0.y) * 0.5;                }"        }

具体fragmentShader相关代码参看官网 qml-qtquick-shadereffect

这里写图片描述

需要完整代码请访问QtQuickExamples

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