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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Graphical Effects module.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Digia Plc 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
Item {
id: rootItem
property variant input
property variant output
property variant sourceRect
visible: false
Component.onCompleted: evaluateInput()
onInputChanged: evaluateInput()
onSourceRectChanged: evaluateInput()
function evaluateInput() {
if (input == undefined) {
output = input
}
else if (sourceRect != undefined && sourceRect != Qt.rect(0, 0, 0, 0) && !isQQuickShaderEffectSource(input)) {
proxySource.sourceItem = input
output = proxySource
proxySource.sourceRect = sourceRect
}
else if (isQQuickItemLayerEnabled(input)) {
output = input
}
else if ((isQQuickImage(input) && !hasTileMode(input) && !hasChildren(input))) {
output = input
}
else if (isQQuickShaderEffectSource(input)) {
output = input
}
else {
proxySource.sourceItem = input
output = proxySource
proxySource.sourceRect = Qt.rect(0, 0, 0, 0)
}
}
function isQQuickItemLayerEnabled(item) {
if (item.hasOwnProperty("layer")) {
var l = item["layer"]
if (l.hasOwnProperty("enabled") && l["enabled"].toString() == "true")
return true
}
return false
}
function isQQuickImage(item) {
var imageProperties = [ "fillMode", "progress", "asynchronous", "sourceSize", "status", "smooth" ]
return hasProperties(item, imageProperties)
}
function isQQuickShaderEffectSource(item) {
var shaderEffectSourceProperties = [ "hideSource", "format", "sourceItem", "mipmap", "wrapMode", "live", "recursive", "sourceRect" ]
return hasProperties(item, shaderEffectSourceProperties)
}
function hasProperties(item, properties) {
var counter = 0
for (var j = 0; j < properties.length; j++) {
if (item.hasOwnProperty(properties [j]))
counter++
}
return properties.length == counter
}
function hasChildren(item) {
if (item.hasOwnProperty("childrenRect")) {
if (item["childrenRect"].toString() != "QRectF(0, 0, 0, 0)")
return true
else
return false
}
return false
}
function hasTileMode(item) {
if (item.hasOwnProperty("fillMode")) {
if (item["fillMode"].toString() != "0")
return true
else
return false
}
return false
}
ShaderEffectSource {
id: proxySource
live: rootItem.input != rootItem.output
hideSource: false
smooth: true
visible: false
}
}
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