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

Qt 5.6.3 Reference Documentation

# Effect.qml Example File

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

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the Qt Mobility Components.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see http://www.qt.io/terms-conditions. For further
      ** information use the contact form at http://www.qt.io/contact-us.
      **
      ** GNU Lesser General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU Lesser
      ** General Public License version 2.1 or version 3 as published by the Free
      ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
      ** following information to ensure the GNU Lesser General Public License
      ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
      **
      ** As a special exception, The Qt Company gives you certain additional
      ** rights. These rights are described in The Qt Company LGPL Exception
      ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      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)
      }