1 files changed, 151 insertions, 0 deletions
diff --git a/src/effects/private/qgfxsourceproxy.cpp b/src/effects/private/qgfxsourceproxy.cpp
new file mode 100644
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+++ b/src/effects/private/qgfxsourceproxy.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2015 Jolla Ltd, author: <gunnar.sletta@jollamobile.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Graphical Effects module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgfxsourceproxy_p.h"
+
+#include <private/qquickshadereffectsource_p.h>
+#include <private/qquickitem_p.h>
+#include <private/qquickimage_p.h>
+
+QT_BEGIN_NAMESPACE
+
+QGfxSourceProxy::QGfxSourceProxy(QQuickItem *parentItem)
+    : QQuickItem(parentItem)
+    , m_input(0)
+    , m_output(0)
+    , m_proxy(0)
+    , m_interpolation(AnyInterpolation)
+{
+}
+
+QGfxSourceProxy::~QGfxSourceProxy()
+{
+    delete m_proxy;
+}
+
+void QGfxSourceProxy::setInput(QQuickItem *input)
+{
+    if (m_input == input)
+        return;
+    m_input = input;
+    polish();
+    emit inputChanged();
+}
+
+void QGfxSourceProxy::setOutput(QQuickItem *output)
+{
+    if (m_output == output)
+        return;
+    m_output = output;
+    emit activeChanged();
+    emit outputChanged();
+}
+
+void QGfxSourceProxy::setSourceRect(const QRectF &sourceRect)
+{
+    if (m_sourceRect == sourceRect)
+        return;
+    m_sourceRect = sourceRect;
+    polish();
+    emit sourceRectChanged();
+}
+
+void QGfxSourceProxy::setInterpolation(Interpolation i)
+{
+    if (m_interpolation == i)
+        return;
+    m_interpolation = i;
+    polish();
+    emit interpolationChanged();
+}
+
+
+void QGfxSourceProxy::useProxy()
+{
+    if (!m_proxy)
+        m_proxy = new QQuickShaderEffectSource(this);
+    m_proxy->setSourceRect(m_sourceRect);
+    m_proxy->setSourceItem(m_input);
+    m_proxy->setSmooth(true);
+    setOutput(m_proxy);
+}
+
+void QGfxSourceProxy::updatePolish()
+{
+    QQuickItemPrivate *d = QQuickItemPrivate::get(m_input);
+
+    if (m_input == 0) {
+        setOutput(0);
+        return;
+    }
+
+    QQuickImage *image = qobject_cast<QQuickImage *>(m_input);
+    QQuickShaderEffectSource *shaderSource = qobject_cast<QQuickShaderEffectSource *>(m_input);
+    bool layered = d->extra.isAllocated() && d->extra->layer && d->extra->layer->enabled();
+
+    if (shaderSource) {
+        if ((shaderSource->sourceRect() != m_sourceRect)
+            || (m_interpolation == LinearInterpolation && !shaderSource->smooth())
+            || (m_interpolation == NearestInterpolation && shaderSource->smooth()))
+            useProxy();
+        else
+            setOutput(m_input);
+
+    } else if (layered) {
+        if ((d->extra->layer->sourceRect() != m_sourceRect)
+            || (m_interpolation == LinearInterpolation && !d->extra->layer->smooth())
+            || (m_interpolation == NearestInterpolation && d->extra->layer->smooth()))
+            useProxy();
+        else
+            setOutput(m_input);
+
+    } else if (image && image->fillMode() == QQuickImage::Stretch && m_input->childItems().size() == 0) {
+        // item is an image with default tiling, use directly
+        setOutput(m_input);
+
+    } else if (m_input->isTextureProvider() && m_input->childItems().size() == 0) {
+        // item is a texture provider without children, use directly...
+        setOutput(m_input);
+
+    } else {
+        useProxy();
+    }
+
+    // Remove the proxy if it is not in use..
+    if (m_proxy && m_output == m_input) {
+        delete m_proxy;
+        m_proxy = 0;
+    }
+}
+
+QT_END_NAMESPACE