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WindowServer: Spawn a secondary thread to decode wallpapers.

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The threading API's are not very mature, so this code looks a bit crufty
but it does take the load off the WindowServer main thread when changing
wallpapers. :^)
This commit is contained in:
Andreas Kling 2019-05-01 16:07:47 +02:00
parent cff3685a4c
commit 6614746ca8
3 changed files with 39 additions and 11 deletions
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36
Servers/WindowServer/WSWindowManager.cpp
View file

@ -188,16 +188,42 @@ void WSWindowManager::tick_clock()
invalidate(menubar_rect());
}
bool WSWindowManager::set_wallpaper(const String& path)
bool WSWindowManager::set_wallpaper(const String& path, Function<void(bool)>&& callback)
{
auto bitmap = load_png(path);
if (!bitmap)
return false;
struct Context {
String path;
RetainPtr<GraphicsBitmap> bitmap;
Function<void(bool)> callback;
};
auto context = make<Context>();
context->path = path;
context->callback = move(callback);
int rc = create_thread([] (void* ctx) -> int {
OwnPtr<Context> context((Context*)ctx);
context->bitmap = load_png(context->path);
if (!context->bitmap) {
context->callback(false);
exit_thread(0);
return 0;
}
the().deferred_invoke([context = move(context)] (auto&) {
the().finish_setting_wallpaper(context->path, *context->bitmap);
context->callback(true);
});
exit_thread(0);
return 0;
}, context.leak_ptr());
ASSERT(rc == 0);
return true;
}
void WSWindowManager::finish_setting_wallpaper(const String& path, Retained<GraphicsBitmap>&& bitmap)
{
m_wallpaper_path = path;
m_wallpaper = move(bitmap);
invalidate();
return true;
}
void WSWindowManager::set_resolution(int width, int height)