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WSCompositor: Use a timer to schedule compose rather than an event

Really poor man's vsync. Still not actual vsync, but at least we won't
constantly spin buffers if we get many dirty rects.
This commit is contained in:
Robin Burchell 2019-05-26 03:40:40 +02:00 committed by Andreas Kling
parent 411cdf067b
commit d66fa60fcf
2 changed files with 15 additions and 14 deletions

View file

@ -8,6 +8,8 @@
#include <SharedGraphics/PNGLoader.h>
#include <SharedGraphics/Painter.h>
// #define COMPOSITOR_DEBUG
WSCompositor& WSCompositor::the()
{
static WSCompositor s_the;
@ -25,15 +27,15 @@ WSCompositor::WSCompositor()
m_wallpaper_path = "/res/wallpapers/retro.rgb";
m_wallpaper = GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, m_wallpaper_path, { 1024, 768 });
}
void WSCompositor::event(CEvent& event)
{
if (event.type() == WSEvent::WM_DeferredCompose) {
m_pending_compose_event = false;
m_compose_timer.on_timeout = [=]() {
#if defined(COMPOSITOR_DEBUG)
dbgprintf("WSCompositor: frame callback\n");
#endif
compose();
return;
}
};
m_compose_timer.set_single_shot(true);
m_compose_timer.set_interval(1000 / 60);
}
void WSCompositor::compose()
@ -159,12 +161,11 @@ void WSCompositor::invalidate(const Rect& a_rect)
if (rect.is_empty())
return;
#if defined(COMPOSITOR_DEBUG)
dbgprintf("Invalidated: %dx%d %dx%d\n", a_rect.x(), a_rect.y(), a_rect.width(), a_rect.height());
#endif
m_dirty_rects.add(rect);
if (!m_pending_compose_event) {
WSEventLoop::the().post_event(*this, make<WSEvent>(WSEvent::WM_DeferredCompose));
m_pending_compose_event = true;
}
m_compose_timer.start();
}
bool WSCompositor::set_wallpaper(const String& path, Function<void(bool)>&& callback)

View file

@ -3,6 +3,7 @@
#include <AK/OwnPtr.h>
#include <AK/RetainPtr.h>
#include <LibCore/CObject.h>
#include <LibCore/CTimer.h>
#include <SharedGraphics/DisjointRectSet.h>
#include <SharedGraphics/GraphicsBitmap.h>
@ -26,7 +27,6 @@ public:
Rect current_cursor_rect() const;
private:
virtual void event(CEvent&) override;
virtual const char* class_name() const override { return "WSCompositor"; }
WSCompositor();
@ -39,7 +39,7 @@ private:
unsigned m_compose_count { 0 };
unsigned m_flush_count { 0 };
bool m_pending_compose_event { false };
CTimer m_compose_timer;
bool m_flash_flush { false };
bool m_buffers_are_flipped { false };