Qt 5.6 | Qt Multimedia | QML Video Shader Effects Example | Effect.qml Example File

Qt 5.6.2 Reference Documentation

# Effect.qml Example File

multimedia/video/qmlvideofx/qml/qmlvideofx/Effect.qml

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      import QtQuick 2.0

      ShaderEffect {
          property variant source
          property ListModel parameters: ListModel { }
          property bool divider: true
          property real dividerValue: 0.5
          property real targetWidth: 0
          property real targetHeight: 0
          property string fragmentShaderFilename
          property string vertexShaderFilename

          QtObject {
              id: d
              property string fragmentShaderCommon: "
                  #ifdef GL_ES
                      precision mediump float;
                  #else
                  #   define lowp
                  #   define mediump
                  #   define highp
                  #endif // GL_ES
              "
          }

          // The following is a workaround for the fact that ShaderEffect
          // doesn't provide a way for shader programs to be read from a file,
          // rather than being inline in the QML file

          onFragmentShaderFilenameChanged:
              fragmentShader = d.fragmentShaderCommon + fileReader.readFile(":shaders/" + fragmentShaderFilename)
          onVertexShaderFilenameChanged:
              vertexShader = fileReader.readFile(vertexShaderFilename)
      }