From 9b71307d499924834d029adc91baf9689bfa49fd Mon Sep 17 00:00:00 2001 From: Andreas Kling Date: Tue, 19 Feb 2019 01:42:53 +0100 Subject: WindowServer: Support windows with alpha channels. And per-WSWindow opacity. This patch also adds a Format concept to GraphicsBitmap. For now there are only two formats: RGB32 and RGBA32. Windows with alpha channel have their backing stores created in the RGBA32 format. Use this to make Terminal windows semi-transparent for that comfy rice look. There is one problem here, in that window compositing overdraw incurs multiple passes of blending of the same pixels. This leads to a mismatch in opacity which is obviously not good. I will work on this in a later patch. The alpha blending is currently straight C++. It should be relatively easy to optimize this using SSE instructions. For now I'm just happy with the cute effect. :^) --- LibGUI/GButton.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'LibGUI/GButton.cpp') diff --git a/LibGUI/GButton.cpp b/LibGUI/GButton.cpp index 8d117ea178..9062baf181 100644 --- a/LibGUI/GButton.cpp +++ b/LibGUI/GButton.cpp @@ -36,7 +36,7 @@ void GButton::paint_event(GPaintEvent&) icon_location.move_by(1, 1); } if (m_icon) { - painter.blit_with_alpha(icon_location, *m_icon, m_icon->rect()); + painter.blit(icon_location, *m_icon, m_icon->rect()); painter.draw_text(content_rect, caption(), TextAlignment::Center, Color::Black); } else { painter.draw_text(content_rect, caption(), TextAlignment::Center, Color::Black); -- cgit v1.2.3