Make InsetInfo math/IPA icons visible in dark mode

[lyx.git] / src / frontends / qt / GuiPainter.cpp

diff --git a/src/frontends/qt/GuiPainter.cpp b/src/frontends/qt/GuiPainter.cpp
index 79bbf5603e85fc9ec31e435c6618a25d61fa5b7a..a143b2b05372e1feea17b5a5ec2ee0ca96089531 100644 (file)
--- a/src/frontends/qt/GuiPainter.cpp
+++ b/src/frontends/qt/GuiPainter.cpp
@@ -233,14 +233,24 @@ void GuiPainter::arc(int x, int y, unsigned int w, unsigned int h,
 }
 
 
-void GuiPainter::image(int x, int y, int w, int h, graphics::Image const & i)
+void GuiPainter::image(int x, int y, int w, int h, graphics::Image const & i, bool const darkmode)
 {
        graphics::GuiImage const & qlimage =
                static_cast<graphics::GuiImage const &>(i);
 
        fillRectangle(x, y, w, h, Color_graphicsbg);
 
-       QImage const & image = qlimage.image();
+       QImage image = qlimage.image();
+       
+       QPalette palette = QPalette();
+       QColor text_color = palette.color(QPalette::Active, QPalette::WindowText);
+       QColor bg_color = palette.color(QPalette::Active, QPalette::Window);
+       // guess whether we are in dark mode
+       if (darkmode && text_color.black() < bg_color.black())
+               // FIXME this is only a cheap approximation
+               // Ideally, replace colors as in GuiApplication::prepareForDarkmode()
+               image.invertPixels();
+
        QRectF const drect = QRectF(x, y, w, h);
        QRectF const srect = QRectF(0, 0, image.width(), image.height());
        // Bilinear filtering is needed on a rare occasion for instant previews when