Since BitmapEx was unified into a single premultiplied 32-bit BGRA
Bitmap, converting such a bitmap runs a per-pixel loop that builds a
BitmapColor and dispatches through the `GetPixelFromData` /
`SetPixelOnData`, (un)premultiplying one channel at a time.
Add a fast scanline path for the common case, a premultiplied 32-bit
truecolor bitmap (ABGR/ARGB/BGRA/RGBA). It resolves each channel's
byte offset once and then moves the scanline bytes directly, using the
premultiply / unpremultiply lookup tables.
Signed-off-by: Karthik <karthik.godha@collabora.com>
Change-Id: Ie8ee47055bdffca9e06d48955fdc0b61b34e08ac
Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/6752
Reviewed-by: Michael Stahl <michael.stahl@collabora.com>
Tested-by: Jenkins CPCI <releng@collaboraoffice.com>
(cherry picked from commit 54c68922eaa2d2c4e20e10091ad4911e8d32aed2)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/208641
Tested-by: Jenkins
Karthik
b7b2913bdc