[SailfishDevel] using icon image provider with custom icons

[Dmitriy Sedov]

In my case, i hust use standart image with custom ShaderEffect , 
like in my button implementation 
<code>
MouseArea {
    id: iconButton
    width: panel.buttonSize
    height: panel.buttonHeight

    Image {
        id: buttonImage
        source: emojiModel.categoryIcon(modelData);
        anchors.centerIn: parent
        width: panel.buttonSize - Theme.paddingSmall
        height: panel.buttonHeight - Theme.paddingSmall
        fillMode: Image.PreserveAspectFit
        layer.enabled: true
        layer.effect: ShaderEffect {
            // grayscale effect
            property variant src: buttonImage
            property color highlight: iconButton.pressed ? Theme.highlightColor :  Theme.primaryColor
            vertexShader: "
                        uniform highp mat4 qt_Matrix;
                        attribute highp vec4 qt_Vertex;
                        attribute highp vec2 qt_MultiTexCoord0;
                        varying highp vec2 coord;
                        void main() {
                            coord = qt_MultiTexCoord0;
                            gl_Position = qt_Matrix * qt_Vertex;
                        }"
            fragmentShader: "
                        varying highp vec2 coord;
                        uniform sampler2D src;
                        uniform lowp vec4 highlight;
                        uniform lowp float qt_Opacity;
                        void main() {
                            lowp vec4 tex = texture2D(src, coord);
                            gl_FragColor = vec4(vec3(dot(tex.rgb,
                                                vec3(0.344, 0.5, 0.156))),
                                                     tex.a) * qt_Opacity * highlight;
                        }"
        }
    }

    onClicked: {
        emojiCategoryView.positionViewAtIndex( index, PathView.Center )
    }
}
</code>
this shader just make any image grayscale and colorize it with Theme color
it can be modify to make disabled button comor and other

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sailfishos.org/pipermail/devel/attachments/20200525/80a4e6f5/attachment.html>