Implement support for 16bpc image formats

Adds support for 16bit per color image formats in QImage. This makes it
possible to read and write 16bpc PNGs, and take full advantage of the
16bpc paint engine.

[ChangeLog][QtGui][QImage] QImage now supports 64bit image formats with
16 bits per color channel, compatible with 16bpc PNG or RGBA16 OpenGL
formats.

Task-number: QTBUG-45858
Change-Id: Icd28bd5868a6efcf65cb5bd56031d42941e04099
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/gui/painting/qdrawhelper_sse4.cpp b/src/gui/painting/qdrawhelper_sse4.cpp
index 0b6f963168..e3cc1dd43e 100644
--- a/src/gui/painting/qdrawhelper_sse4.cpp
+++ b/src/gui/painting/qdrawhelper_sse4.cpp
@@ -332,6 +332,20 @@ void QT_FASTCALL destStore64RGBA8888_sse4(QRasterBuffer *rasterBuffer, int x, in
     convertARGBFromRGBA64PM_sse4<true>(dest, buffer, length);
 }
 
+void QT_FASTCALL storeARGB32FromRGBA64PM_sse4(uchar *dest, const QRgba64 *src, int index, int count,
+                                              const QVector<QRgb> *, QDitherInfo *)
+{
+    uint *d = (uint*)dest + index;
+    convertARGBFromRGBA64PM_sse4<false>(d, src, count);
+}
+
+void QT_FASTCALL storeRGBA8888FromRGBA64PM_sse4(uchar *dest, const QRgba64 *src, int index, int count,
+                                                const QVector<QRgb> *, QDitherInfo *)
+{
+    uint *d = (uint*)dest + index;
+    convertARGBFromRGBA64PM_sse4<true>(d, src, count);
+}
+
 template
 void QT_FASTCALL storeA2RGB30PMFromARGB32PM_sse4<PixelOrderBGR>(uchar *dest, const uint *src, int index, int count,
                                                                 const QVector<QRgb> *, QDitherInfo *);