Solid and gradients in high color accuracy

This patch updates the internal color precisions of solids and
gradients to 16bit per color. This makes it possible to render
at higher precision on non-premultiplied ARGB32, the RGB30
formats and any other hi-color formats if more are added.

[ChangeLog][QtGui][Painting] Internal precision of solids and gradients
is now up to 16bit per color.

Change-Id: Ieae5468bd6de1f56adfa4cb9fa966faf2ed824fd
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

1 files changed, 12 insertions, 5 deletions

diff --git a/src/gui/painting/qdrawhelper_sse2.cpp b/src/gui/painting/qdrawhelper_sse2.cpp
index 84eb3b7909..b8957fe2fb 100644
--- a/src/gui/painting/qdrawhelper_sse2.cpp
+++ b/src/gui/painting/qdrawhelper_sse2.cpp
@@ -417,7 +417,7 @@ void qt_memfill16(quint16 *dest, quint16 value, int count)
         dest[count - 1] = value;
 }
 
-void qt_bitmapblit32_sse2(QRasterBuffer *rasterBuffer, int x, int y,
+void qt_bitmapblit32_sse2_base(QRasterBuffer *rasterBuffer, int x, int y,
                           quint32 color,
                           const uchar *src, int width, int height, int stride)
 {
@@ -468,18 +468,25 @@ void qt_bitmapblit32_sse2(QRasterBuffer *rasterBuffer, int x, int y,
     }
 }
 
+void qt_bitmapblit32_sse2(QRasterBuffer *rasterBuffer, int x, int y,
+                          const QRgba64 &color,
+                          const uchar *src, int width, int height, int stride)
+{
+    qt_bitmapblit32_sse2_base(rasterBuffer, x, y, color.toArgb32(), src, width, height, stride);
+}
+
 void qt_bitmapblit8888_sse2(QRasterBuffer *rasterBuffer, int x, int y,
-                            quint32 color,
+                            const QRgba64 &color,
                             const uchar *src, int width, int height, int stride)
 {
-    qt_bitmapblit32_sse2(rasterBuffer, x, y, ARGB2RGBA(color), src, width, height, stride);
+    qt_bitmapblit32_sse2_base(rasterBuffer, x, y, ARGB2RGBA(color.toArgb32()), src, width, height, stride);
 }
 
 void qt_bitmapblit16_sse2(QRasterBuffer *rasterBuffer, int x, int y,
-                          quint32 color,
+                          const QRgba64 &color,
                           const uchar *src, int width, int height, int stride)
 {
-    const quint16 c = qConvertRgb32To16(color);
+    const quint16 c = qConvertRgb32To16(color.toArgb32());
     quint16 *dest = reinterpret_cast<quint16*>(rasterBuffer->scanLine(y)) + x;
     const int destStride = rasterBuffer->bytesPerLine() / sizeof(quint16);