1 files changed, 137 insertions, 0 deletions
diff --git a/src/controls/Private/SourceProxy.qml b/src/controls/Private/SourceProxy.qml
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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
+    }
+}
+