diff options
Diffstat (limited to 'tests/manual/examples/widgets/tools/plugandpaint/plugins/extrafilters/extrafiltersplugin.cpp')
-rw-r--r-- | tests/manual/examples/widgets/tools/plugandpaint/plugins/extrafilters/extrafiltersplugin.cpp | 82 |
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; +} |