1 files changed, 82 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/tools/plugandpaint/plugins/extrafilters/extrafiltersplugin.cpp b/tests/manual/examples/widgets/tools/plugandpaint/plugins/extrafilters/extrafiltersplugin.cpp
new file mode 100644
index 0000000000..5356efc328
--- /dev/null
+++ b/tests/manual/examples/widgets/tools/plugandpaint/plugins/extrafilters/extrafiltersplugin.cpp
@@ -0,0 +1,82 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "extrafiltersplugin.h"
+
+#include <QInputDialog>
+
+QStringList ExtraFiltersPlugin::filters() const
+{
+    return {tr("Flip Horizontally"), tr("Flip Vertically"),
+            tr("Smudge..."), tr("Threshold...")};
+}
+
+QImage ExtraFiltersPlugin::filterImage(const QString &filter,
+                                       const QImage &image, QWidget *parent)
+{
+    QImage original = image.convertToFormat(QImage::Format_RGB32);
+    QImage result = original;
+
+    if (filter == tr("Flip Horizontally")) {
+        for (int y = 0; y < original.height(); ++y) {
+            for (int x = 0; x < original.width(); ++x) {
+                QRgb pixel = original.pixel(original.width() - x - 1, y);
+                result.setPixel(x, y, pixel);
+            }
+        }
+    } else if (filter == tr("Flip Vertically")) {
+        for (int y = 0; y < original.height(); ++y) {
+            for (int x = 0; x < original.width(); ++x) {
+                QRgb pixel = original.pixel(x, original.height() - y - 1);
+                result.setPixel(x, y, pixel);
+            }
+        }
+    } else if (filter == tr("Smudge...")) {
+        bool ok;
+        int numIters = QInputDialog::getInt(parent, tr("Smudge Filter"),
+                                    tr("Enter number of iterations:"),
+                                    5, 1, 20, 1, &ok);
+        if (ok) {
+            for (int i = 0; i < numIters; ++i) {
+                for (int y = 1; y < original.height() - 1; ++y) {
+                    for (int x = 1; x < original.width() - 1; ++x) {
+                        QRgb p1 = original.pixel(x, y);
+                        QRgb p2 = original.pixel(x, y + 1);
+                        QRgb p3 = original.pixel(x, y - 1);
+                        QRgb p4 = original.pixel(x + 1, y);
+                        QRgb p5 = original.pixel(x - 1, y);
+
+                        int red = (qRed(p1) + qRed(p2) + qRed(p3) + qRed(p4)
+                                   + qRed(p5)) / 5;
+                        int green = (qGreen(p1) + qGreen(p2) + qGreen(p3)
+                                     + qGreen(p4) + qGreen(p5)) / 5;
+                        int blue = (qBlue(p1) + qBlue(p2) + qBlue(p3)
+                                    + qBlue(p4) + qBlue(p5)) / 5;
+                        int alpha = (qAlpha(p1) + qAlpha(p2) + qAlpha(p3)
+                                     + qAlpha(p4) + qAlpha(p5)) / 5;
+
+                        result.setPixel(x, y, qRgba(red, green, blue, alpha));
+                    }
+                }
+            }
+        }
+    } else if (filter == tr("Threshold...")) {
+        bool ok;
+        int threshold = QInputDialog::getInt(parent, tr("Threshold Filter"),
+                                                 tr("Enter threshold:"),
+                                                 10, 1, 256, 1, &ok);
+        if (ok) {
+            int factor = 256 / threshold;
+            for (int y = 0; y < original.height(); ++y) {
+                for (int x = 0; x < original.width(); ++x) {
+                    QRgb pixel = original.pixel(x, y);
+                    result.setPixel(x, y, qRgba(qRed(pixel) / factor * factor,
+                                                qGreen(pixel) / factor * factor,
+                                                qBlue(pixel) / factor * factor,
+                                                qAlpha(pixel)));
+                }
+            }
+        }
+    }
+    return result;
+}