High-dpi SVG and QQuickImageProvider Images

Scale sourceSize by the target devicePixelRatio before
passing it to the providers.

Task-number: QTBUG-38127
Task-number: QTBUG-38991
Change-Id: I1746e0859b4e63eb0d28d1a1c8aac610b68a9eb9
Reviewed-by: Jocelyn Turcotte <jturcotte@woboq.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

7 files changed, 316 insertions, 0 deletions

diff --git a/tests/manual/highdpi/ImageProvider/qmldir b/tests/manual/highdpi/ImageProvider/qmldir
new file mode 100644
index 0000000000..add39d4ee8
--- /dev/null
+++ b/tests/manual/highdpi/ImageProvider/qmldir
@@ -0,0 +1 @@
+plugin qmlimageproviderplugin
diff --git a/tests/manual/highdpi/heart.svg b/tests/manual/highdpi/heart.svg
new file mode 100644
index 0000000000..8c982cd93c
--- /dev/null
+++ b/tests/manual/highdpi/heart.svg
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) --><svg viewBox="100 200 550 500" height="841.88976pt" id="svg1" inkscape:version="0.40+cvs" sodipodi:docbase="C:\Documents and Settings\Jon Phillips\My Documents\projects\clipart-project\submissions" sodipodi:docname="heart-left-highlight.svg" sodipodi:version="0.32" width="595.27559pt" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://web.resource.org/cc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:sodipodi="http://inkscape.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:svg="http://www.w3.org/2000/svg">
+<metadata>
+<rdf:RDF xmlns:cc="http://web.resource.org/cc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+<cc:Work rdf:about="">
+<dc:title>Heart Left-Highlight</dc:title>
+<dc:description>This is a normal valentines day heart.</dc:description>
+<dc:subject>
+<rdf:Bag>
+<rdf:li>holiday</rdf:li>
+<rdf:li>valentines</rdf:li>
+<rdf:li></rdf:li>
+<rdf:li>valentine</rdf:li>
+<rdf:li>hash(0x8a091c0)</rdf:li>
+<rdf:li>hash(0x8a0916c)</rdf:li>
+<rdf:li>signs_and_symbols</rdf:li>
+<rdf:li>hash(0x8a091f0)</rdf:li>
+<rdf:li>day</rdf:li>
+</rdf:Bag>
+</dc:subject>
+<dc:publisher>
+<cc:Agent rdf:about="http://www.openclipart.org">
+<dc:title>Jon Phillips</dc:title>
+</cc:Agent>
+</dc:publisher>
+<dc:creator>
+<cc:Agent>
+<dc:title>Jon Phillips</dc:title>
+</cc:Agent>
+</dc:creator>
+<dc:rights>
+<cc:Agent>
+<dc:title>Jon Phillips</dc:title>
+</cc:Agent>
+</dc:rights>
+<dc:date></dc:date>
+<dc:format>image/svg+xml</dc:format>
+<dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
+<cc:license rdf:resource="http://web.resource.org/cc/PublicDomain"/>
+<dc:language>en</dc:language>
+</cc:Work>
+<cc:License rdf:about="http://web.resource.org/cc/PublicDomain">
+<cc:permits rdf:resource="http://web.resource.org/cc/Reproduction"/>
+<cc:permits rdf:resource="http://web.resource.org/cc/Distribution"/>
+<cc:permits rdf:resource="http://web.resource.org/cc/DerivativeWorks"/>
+</cc:License>
+</rdf:RDF>
+</metadata>
+<defs id="defs3"/>
+<sodipodi:namedview bordercolor="#666666" borderopacity="1.0" id="base" inkscape:current-layer="layer1" inkscape:cx="549.40674" inkscape:cy="596.00159" inkscape:document-units="px" inkscape:guide-bbox="true" inkscape:pageopacity="0.0" inkscape:pageshadow="2" inkscape:window-height="615" inkscape:window-width="866" inkscape:window-x="88" inkscape:window-y="116" inkscape:zoom="0.35000000" pagecolor="#ffffff" showguides="true"/>
+<g id="layer1" inkscape:groupmode="layer" inkscape:label="Layer 1">
+<path d="M 263.41570,235.14588 C 197.17570,235.14588 143.41575,288.90587 143.41575,355.14588 C 143.41575,489.90139 279.34890,525.23318 371.97820,658.45392 C 459.55244,526.05056 600.54070,485.59932 600.54070,355.14588 C 600.54070,288.90588 546.78080,235.14587 480.54070,235.14588 C 432.49280,235.14588 391.13910,263.51631 371.97820,304.33338 C 352.81740,263.51630 311.46370,235.14587 263.41570,235.14588 z " id="path7" sodipodi:nodetypes="ccccccc" style="fill:#e60000;fill-opacity:1.0000000;stroke:#000000;stroke-width:18.700001;stroke-miterlimit:4.0000000;stroke-opacity:1.0000000"/>
+<path d="M 265.00000,253.59375 C 207.04033,253.59375 160.00000,300.63407 160.00000,358.59375 C 160.00000,476.50415 278.91857,507.43251 359.96875,624.00000 C 366.52868,614.08205 220.00000,478.47309 220.00000,378.59375 C 220.00000,320.63407 267.04033,273.59375 325.00000,273.59375 C 325.50453,273.59375 325.99718,273.64912 326.50000,273.65625 C 309.22436,261.07286 288.00557,253.59374 265.00000,253.59375 z " id="path220" sodipodi:nodetypes="ccccccc" style="fill:#e6e6e6;fill-opacity:0.64556962;stroke:none;stroke-width:18.700001;stroke-miterlimit:4.0000000;stroke-opacity:1.0000000"/>
+</g>
+</svg>
diff --git a/tests/manual/highdpi/highdpi.pro b/tests/manual/highdpi/highdpi.pro
new file mode 100644
index 0000000000..a434f848ae
--- /dev/null
+++ b/tests/manual/highdpi/highdpi.pro
@@ -0,0 +1,13 @@
+TEMPLATE = lib
+CONFIG += plugin
+QT += qml quick
+
+DESTDIR = ImageProvider
+TARGET  = qmlimageproviderplugin
+
+SOURCES += imageprovider.cpp
+
+target.path = $$[QT_INSTALL_EXAMPLES]/quick/imageprovider/ImageProvider
+qml.files = ImageProvider/qmldir
+qml.path = $$[QT_INSTALL_EXAMPLES]/quick/imageprovider/ImageProvider
+INSTALLS = target qml
diff --git a/tests/manual/highdpi/highdpi.qmlproject b/tests/manual/highdpi/highdpi.qmlproject
new file mode 100644
index 0000000000..2bb4016996
--- /dev/null
+++ b/tests/manual/highdpi/highdpi.qmlproject
@@ -0,0 +1,14 @@
+import QmlProject 1.0
+
+Project {
+    /* Include .qml, .js, and image files from current directory and subdirectories */
+    QmlFiles {
+        directory: "."
+    }
+    JavaScriptFiles {
+        directory: "."
+    }
+    ImageFiles {
+        directory: "."
+    }
+}
diff --git a/tests/manual/highdpi/imageprovider.cpp b/tests/manual/highdpi/imageprovider.cpp
new file mode 100644
index 0000000000..8488d3c6a7
--- /dev/null
+++ b/tests/manual/highdpi/imageprovider.cpp
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the demonstration applications 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <qqmlextensionplugin.h>
+
+#include <qqmlengine.h>
+#include <qquickimageprovider.h>
+#include <QImage>
+#include <QPainter>
+#include <qDebug.h>
+
+class ColorImageProvider : public QQuickImageProvider
+{
+public:
+    ColorImageProvider()
+        : QQuickImageProvider(QQuickImageProvider::Pixmap)
+    {
+    }
+
+    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
+    {
+        int width = 50;
+        int height = 50;
+
+        QPixmap pixmap(requestedSize.width() > 0 ? requestedSize.width() : width,
+                       requestedSize.height() > 0 ? requestedSize.height() : height);
+        if (size)
+            *size = QSize(pixmap.width(), pixmap.height());
+        pixmap.fill(QColor(id).rgba());
+
+        // draw lines on even y offsets
+        QPainter p(&pixmap);
+        for (int y = 0; y < pixmap.height(); y+=2) {
+            p.drawLine(0, y, pixmap.width(), y);
+        }
+        return pixmap;
+    }
+};
+
+
+class ImageProviderExtensionPlugin : public QQmlExtensionPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QQmlExtensionInterface")
+public:
+    void registerTypes(const char *uri)
+    {
+        Q_UNUSED(uri);
+    }
+
+    void initializeEngine(QQmlEngine *engine, const char *uri)
+    {
+        Q_UNUSED(uri);
+        engine->addImageProvider("colors", new ColorImageProvider);
+    }
+
+};
+
+
+#define QQmlExtensionInterface_iid "org.qt-project.Qt.QQmlExtensionInterface"
+
+
+#include "imageprovider.moc"
diff --git a/tests/manual/highdpi/imageprovider.qml b/tests/manual/highdpi/imageprovider.qml
new file mode 100644
index 0000000000..8125d774ad
--- /dev/null
+++ b/tests/manual/highdpi/imageprovider.qml
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml 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 Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+import "ImageProvider"
+
+Rectangle {
+    width: 400
+    height: 400
+
+    Row {
+        // should render a sharp image on high-dpi displays. sourceSize is in device-independent
+        // pixels; the image provider will be asked to create a 400x400 device pixel image.
+        Image {
+            sourceSize.width: 200
+            sourceSize.height: 200
+            source: "image://colors/green"
+        }
+
+        // should NOT render a sharp image on retina displays. sourceSize is omitted and
+        // the image provider default size will be used (in this case 50x50).
+        Image {
+            width : 200
+            height : 200
+            source : "image://colors/red"
+        }
+
+    }
+}
diff --git a/tests/manual/highdpi/svg.qml b/tests/manual/highdpi/svg.qml
new file mode 100644
index 0000000000..ed2444d4da
--- /dev/null
+++ b/tests/manual/highdpi/svg.qml
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml 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 Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+Rectangle {
+    width: 400
+    height: 400
+
+    Row {
+        Column {
+            // should render a sharp image on retina displays: (sourceSize is in device-independent pixels)
+            Image {
+                sourceSize.width: 100
+                sourceSize.height: 100
+                source : "heart.svg"
+            }
+
+            // should render a sharp image on retina displays: if sourceSize is omitted
+            // the svg viewBox size will be used; in this case 550x500
+            Image {
+                width : 100
+                height : 100
+                source : "heart.svg"
+            }
+        }
+
+        // should render a sharp image on retina displays: (sourceSize is in device-independent pixels)
+        Image {
+            sourceSize.width: 700
+            sourceSize.height: 700
+            source : "heart.svg"
+        }
+
+        // should NOT render a sharp image on retina displays: if sourceSize is omitted
+        // the svg viewBox size will be used; in this case 550x500
+        Image {
+            width : 700
+            height : 700
+            source : "heart.svg"
+        }
+    }
+}