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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
import "../contents"
Item {
id:container
width:360
height:600
Column {
spacing:5
anchors.fill:parent
Text { font.pointSize:25; text:"Processing pixels"; anchors.horizontalCenter:parent.horizontalCenter}
Canvas {
id:canvas
width:360
height:360
smooth:true
renderTarget:Canvas.FramebufferObject
renderStrategy: Canvas.Cooperative
property string image :"../contents/qt-logo.png"
Component.onCompleted:loadImage(image);
onImageLoaded:requestPaint();
onPaint: {
var ctx = canvas.getContext('2d');
if (canvas.isImageLoaded(image)) {
var pixels = ctx.createImageData(image);
//pixels.mirror();
pixels.filter(ctx.GrayScale);
//pixels.filter(ctx.Threshold, 100); //default 127
//pixels.filter(ctx.Blur, 20); //default 10
//pixels.filter(ctx.Opaque);
//pixels.filter(ctx.Invert);
//pixels.filter(ctx.Convolute, [0,-1,0,
// -1,5,-1,
// 0,-1,0]);
//ctx.putImageData(pixels, 0, 0, canvas.width, canvas.height);
ctx.putImageData(pixels, 0, 0);
}
}
}
}
}
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