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Tests for semi transparent blend on opaque formats 

This patch adds tests for the consistent handling of transparent
drawing results on opaque formats that was introduced with commit
6f7d370ade

Change-Id: If5d11d0f2e111ef88490a4dc20a64b0858ad5426
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
bb10
Allan Sandfeld Jensen 2014-01-23 10:44:08 +01:00 committed by The Qt Project
parent 433ea5eb0c
commit b7396dc39f
1 changed files with 110 additions and 0 deletions
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110
tests/auto/gui/painting/qpainter/tst_qpainter.cpp
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@ -80,6 +80,7 @@
Q_DECLARE_METATYPE(QGradientStops)
Q_DECLARE_METATYPE(QPainterPath)
Q_DECLARE_METATYPE(QImage::Format)
Q_DECLARE_METATYPE(QPainter::CompositionMode)
class tst_QPainter : public QObject
{
@ -287,6 +288,9 @@ private slots:
void cosmeticStrokerClipping_data();
void cosmeticStrokerClipping();
void blendARGBonRGB_data();
void blendARGBonRGB();
private:
void fillData();
void setPenColor(QPainter& p);
@ -4528,6 +4532,112 @@ void tst_QPainter::QTBUG25153_drawLine()
}
}
void tst_QPainter::blendARGBonRGB_data()
{
QTest::addColumn<QImage::Format>("dst_format");
QTest::addColumn<QImage::Format>("src_format");
QTest::addColumn<QPainter::CompositionMode>("compositionMode");
QTest::addColumn<QRgb>("color");
QTest::addColumn<int>("expected_red");
QTest::newRow("ARGB over ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 127 ;
QTest::newRow("ARGB_PM over ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver<< qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 255;
QTest::newRow("ARGB_PM source ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 255;
QTest::newRow("ARGB source-in ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 255 ;
QTest::newRow("ARGB_PM source-in ARGB32") << QImage::Format_ARGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 255;
// Only ARGB does inverse premultiply, on the rest over and source gives similar results:
QTest::newRow("ARGB over RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM over RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source-in RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source-in RGB32") << QImage::Format_RGB32 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB over RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM over RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source-in RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source-in RGB888") << QImage::Format_RGB888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB over RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM over RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB source-in RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 127;
QTest::newRow("ARGB_PM source-in RGBx8888") << QImage::Format_RGBX8888 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 127;
QTest::newRow("ARGB over RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 123;
QTest::newRow("ARGB_PM over RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver << qRgba(127, 0, 0, 127) << 123;
QTest::newRow("ARGB source RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 123;
QTest::newRow("ARGB_PM source RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 123;
QTest::newRow("ARGB source-in RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 123;
QTest::newRow("ARGB_PM source-in RGB16") << QImage::Format_RGB16 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 123;
QTest::newRow("ARGB over RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceOver << qRgba(255, 0, 0, 127) << 125;
QTest::newRow("ARGB_PM over RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceOver << qRgba(127, 0, 0, 127) << 125;
QTest::newRow("ARGB source RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32
<< QPainter::CompositionMode_Source << qRgba(255, 0, 0, 127) << 125;
QTest::newRow("ARGB_PM source RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_Source << qRgba(127, 0, 0, 127) << 125;
QTest::newRow("ARGB source-in RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32
<< QPainter::CompositionMode_SourceIn << qRgba(255, 0, 0, 127) << 125;
QTest::newRow("ARGB_PM source-in RGB666") << QImage::Format_RGB666 << QImage::Format_ARGB32_Premultiplied
<< QPainter::CompositionMode_SourceIn << qRgba(127, 0, 0, 127) << 125;
}
void tst_QPainter::blendARGBonRGB()
{
QFETCH(QImage::Format, dst_format);
QFETCH(QImage::Format, src_format);
QFETCH(QPainter::CompositionMode, compositionMode);
QFETCH(QRgb, color);
QFETCH(int, expected_red);
QImage imageRgb(16,16, dst_format);
QImage imageArgb(16,16, src_format);
QPainter painter;
imageArgb.fill(color);
imageRgb.fill(Qt::black);
painter.begin(&imageRgb);
painter.setCompositionMode(compositionMode);
painter.drawImage(0, 0, imageArgb);
painter.end();
QCOMPARE(qRed(imageRgb.pixel(0,0)), expected_red);
}
enum CosmeticStrokerPaint
{
Antialiasing,