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QImage, ARGB and RGBA, alpha channel is never first in raw bits
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I have an image that I am setting it's pixels to
QColor(200, 201, 203, 155)(R:200,G:201,B:203,A:155).When using
Format_RGBA8888, the raw bits are ordered in RGBA, which is expected.However, when using
Format_ARGB32, the raw bits are ordered in BGRA, which is seemingly incorrect. I expected ARGB.What format should I used to get the alpha channel represented as the first byte of each pixel (32bit)?
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The result you are having is just dictated by the endianness of your system. You can see it in https://code.woboq.org/qt5/qtbase/src/gui/image/qimage.cpp.html#2374
