diff options
Diffstat (limited to 'src/gui/kernel/qplatformscreen.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformscreen.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformscreen.cpp b/src/gui/kernel/qplatformscreen.cpp index 745b89018e..edf546799f 100644 --- a/src/gui/kernel/qplatformscreen.cpp +++ b/src/gui/kernel/qplatformscreen.cpp @@ -393,4 +393,31 @@ QRect QPlatformScreen::mapBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation return rect; } +/*! + Returns a hint about this screen's subpixel layout structure. + + The default implementation queries the \b{QT_SUBPIXEL_AA_TYPE} env variable. + This is just a hint because most platforms don't have a way to retrieve the correct value from hardware + and instead rely on font configurations. +*/ +QPlatformScreen::SubpixelAntialiasingType QPlatformScreen::subpixelAntialiasingTypeHint() const +{ + static int type = -1; + if (type == -1) { + QByteArray env = qgetenv("QT_SUBPIXEL_AA_TYPE"); + if (env == "RGB") + type = QPlatformScreen::Subpixel_RGB; + else if (env == "BGR") + type = QPlatformScreen::Subpixel_BGR; + else if (env == "VRGB") + type = QPlatformScreen::Subpixel_VRGB; + else if (env == "VBGR") + type = QPlatformScreen::Subpixel_VBGR; + else + type = QPlatformScreen::Subpixel_None; + } + + return static_cast<QPlatformScreen::SubpixelAntialiasingType>(type); +} + QT_END_NAMESPACE |