diff options
| -rw-r--r-- | src/gui/image/qimage.cpp | 23 | ||||
| -rw-r--r-- | tests/auto/gui/image/qimage/tst_qimage.cpp | 13 |
2 files changed, 19 insertions, 17 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index b2e5ac93b1..43b77a862d 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -2096,8 +2096,8 @@ static QImage convertWithPalette(const QImage &src, QImage::Format format, Returns a copy of the image converted to the given \a format, using the specified \a colorTable. - Conversion from 32 bit to 8 bit indexed is a slow operation and - will use a straightforward nearest color approach, with no + Conversion from RGB formats to indexed formats is a slow operation + and will use a straightforward nearest color approach, with no dithering. */ QImage QImage::convertToFormat(Format format, const QVector<QRgb> &colorTable, Qt::ImageConversionFlags flags) const @@ -2105,23 +2105,12 @@ QImage QImage::convertToFormat(Format format, const QVector<QRgb> &colorTable, Q if (!d || d->format == format) return *this; - if (format <= QImage::Format_Indexed8 && depth() == 32) { - return convertWithPalette(*this, format, colorTable); - } - - const Image_Converter *converterPtr = &qimage_converter_map[d->format][format]; - Image_Converter converter = *converterPtr; - if (!converter) + if (format == QImage::Format_Invalid) return QImage(); + if (format <= QImage::Format_Indexed8) + return convertWithPalette(convertToFormat(QImage::Format_ARGB32, flags), format, colorTable); - QImage image(d->width, d->height, format); - QIMAGE_SANITYCHECK_MEMORY(image); - - image.d->offset = offset(); - copyMetadata(image.d, d); - - converter(image.d, d, flags); - return image; + return convertToFormat(format, flags); } /*! diff --git a/tests/auto/gui/image/qimage/tst_qimage.cpp b/tests/auto/gui/image/qimage/tst_qimage.cpp index fac785ac86..73e11e7cc7 100644 --- a/tests/auto/gui/image/qimage/tst_qimage.cpp +++ b/tests/auto/gui/image/qimage/tst_qimage.cpp @@ -69,6 +69,7 @@ private slots: void convertToFormat_data(); void convertToFormat(); + void convertToFormatWithColorTable(); void convertToFormatRgb888ToRGB32(); @@ -958,6 +959,18 @@ void tst_QImage::convertToFormat() QFile::remove(QLatin1String("expected2.xpm")); } +void tst_QImage::convertToFormatWithColorTable() +{ + QVector<QRgb> colors(2); + colors[0] = 0xFF000000; + colors[1] = 0xFFFFFFFF; + for (int format = QImage::Format_RGB32; format < QImage::Format_Alpha8; ++format) { + QImage fromImage(10, 10, (QImage::Format)format); + QImage bitmap = fromImage.convertToFormat(QImage::Format_Mono, colors); + QVERIFY(!bitmap.isNull()); + } +} + void tst_QImage::convertToFormatRgb888ToRGB32() { // 545 so width % 4 != 0. This ensure there is padding at the end of the scanlines |