Add comparation of images with indexed color

Previously, two images with indexed colors were not equal if their
color tables were not the same. The image are not compared by
the value of the pixels

Reviewed-by: Samuel

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/auto/qimage/tst_qimage.cpp b/tests/auto/qimage/tst_qimage.cpp
index c6b0560e85..b7199f3c67 100644
--- a/tests/auto/qimage/tst_qimage.cpp
+++ b/tests/auto/qimage/tst_qimage.cpp
@@ -131,6 +131,8 @@ private slots:
     void nullSize();
 
     void premultipliedAlphaConsistency();
+
+    void compareIndexed();
 };
 
 tst_QImage::tst_QImage()
@@ -1762,5 +1764,31 @@ void tst_QImage::premultipliedAlphaConsistency()
     }
 }
 
+void tst_QImage::compareIndexed()
+{
+    QImage img(256, 1, QImage::Format_Indexed8);
+
+    QVector<QRgb> colorTable(256);
+    for (int i = 0; i < 256; ++i)
+        colorTable[i] = qRgb(i, i, i);
+    img.setColorTable(colorTable);
+
+    for (int i = 0; i < 256; ++i) {
+        img.setPixel(i, 0, i);
+    }
+
+    QImage imgInverted(256, 1, QImage::Format_Indexed8);
+    QVector<QRgb> invertedColorTable(256);
+    for (int i = 0; i < 256; ++i)
+        invertedColorTable[255-i] = qRgb(i, i, i);
+    imgInverted.setColorTable(invertedColorTable);
+
+    for (int i = 0; i < 256; ++i) {
+        imgInverted.setPixel(i, 0, (255-i));
+    }
+
+    QCOMPARE(img, imgInverted);
+}
+
 QTEST_MAIN(tst_QImage)
 #include "tst_qimage.moc"