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WindowServer+LibGUI: Allow arbitrary number of rects in messages.

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To get truly atomic updates, add a mechanism for passing arbitrary amounts
of extra data along with WindowServer messages. This allows us to pass all
the rects in a single message.
This commit is contained in:
Andreas Kling 2019-04-22 01:15:47 +02:00
parent f9d3abf5d0
commit 9f122bff5a
12 changed files with 167 additions and 60 deletions
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58
LibGUI/GEventLoop.cpp
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@ -80,15 +80,19 @@ GEventLoop::~GEventLoop()
{
}
void GEventLoop::handle_paint_event(const WSAPI_ServerMessage& event, GWindow& window)
void GEventLoop::handle_paint_event(const WSAPI_ServerMessage& event, GWindow& window, const ByteBuffer& extra_data)
{
#ifdef GEVENTLOOP_DEBUG
dbgprintf("WID=%x Paint [%d,%d %dx%d]\n", event.window_id, event.paint.rect.location.x, event.paint.rect.location.y, event.paint.rect.size.width, event.paint.rect.size.height);
#endif
Vector<Rect, 32> rects;
ASSERT(event.rect_count <= 32);
for (int i = 0; i < event.rect_count; ++i)
for (int i = 0; i < min(WSAPI_ServerMessage::max_inline_rect_count, event.rect_count); ++i)
rects.append(event.rects[i]);
if (event.extra_size) {
auto* extra_rects = reinterpret_cast<const WSAPI_Rect*>(extra_data.data());
for (int i = 0; i < event.rect_count - WSAPI_ServerMessage::max_inline_rect_count; ++i)
rects.append(extra_rects[i]);
}
post_event(window, make<GMultiPaintEvent>(rects, event.paint.window_size));
}
@ -198,14 +202,15 @@ void GEventLoop::handle_wm_event(const WSAPI_ServerMessage& event, GWindow& wind
ASSERT_NOT_REACHED();
}
void GEventLoop::process_unprocessed_messages()
void GEventLoop::process_unprocessed_bundles()
{
int coalesced_paints = 0;
int coalesced_resizes = 0;
auto unprocessed_events = move(m_unprocessed_messages);
auto unprocessed_bundles = move(m_unprocessed_bundles);
HashMap<int, Size> latest_size_for_window_id;
for (auto& event : unprocessed_events) {
for (auto& bundle : unprocessed_bundles) {
auto& event = bundle.message;
if (event.type == WSAPI_ServerMessage::Type::WindowResized) {
latest_size_for_window_id.set(event.window_id, event.window.rect.size);
}
@ -213,7 +218,8 @@ void GEventLoop::process_unprocessed_messages()
int paint_count = 0;
HashMap<int, Size> latest_paint_size_for_window_id;
for (auto& event : unprocessed_events) {
for (auto& bundle : unprocessed_bundles) {
auto& event = bundle.message;
if (event.type == WSAPI_ServerMessage::Type::Paint) {
++paint_count;
#ifdef COALESCING_DEBUG
@ -226,7 +232,8 @@ void GEventLoop::process_unprocessed_messages()
dbgprintf("paint_count: %d\n", paint_count);
#endif
for (auto& event : unprocessed_events) {
for (auto& bundle : unprocessed_bundles) {
auto& event = bundle.message;
if (event.type == WSAPI_ServerMessage::Type::Greeting) {
s_server_pid = event.greeting.server_pid;
GDesktop::the().did_receive_screen_rect(Badge<GEventLoop>(), event.greeting.screen_rect);
@ -264,7 +271,7 @@ void GEventLoop::process_unprocessed_messages()
++coalesced_paints;
break;
}
handle_paint_event(event, *window);
handle_paint_event(event, *window, bundle.extra_data);
break;
case WSAPI_ServerMessage::Type::MouseDown:
case WSAPI_ServerMessage::Type::MouseUp:
@ -310,8 +317,8 @@ void GEventLoop::process_unprocessed_messages()
dbgprintf("Coalesced %d resizes\n", coalesced_resizes);
#endif
if (!m_unprocessed_messages.is_empty())
process_unprocessed_messages();
if (!m_unprocessed_bundles.is_empty())
process_unprocessed_bundles();
}
bool GEventLoop::drain_messages_from_server()
@ -334,15 +341,30 @@ bool GEventLoop::drain_messages_from_server()
return true;
}
assert(nread == sizeof(message));
m_unprocessed_messages.append(move(message));
ByteBuffer extra_data;
if (message.extra_size) {
extra_data = ByteBuffer::create_uninitialized(message.extra_size);
int extra_nread = read(s_event_fd, extra_data.data(), extra_data.size());
ASSERT(extra_nread == message.extra_size);
}
m_unprocessed_bundles.append({ move(message), move(extra_data) });
is_first_pass = false;
}
}
bool GEventLoop::post_message_to_server(const WSAPI_ClientMessage& message)
bool GEventLoop::post_message_to_server(const WSAPI_ClientMessage& message, const ByteBuffer& extra_data)
{
if (!extra_data.is_empty())
const_cast<WSAPI_ClientMessage&>(message).extra_size = extra_data.size();
int nwritten = write(s_event_fd, &message, sizeof(WSAPI_ClientMessage));
return nwritten == sizeof(WSAPI_ClientMessage);
ASSERT(nwritten == sizeof(WSAPI_ClientMessage));
if (!extra_data.is_empty()) {
nwritten = write(s_event_fd, extra_data.data(), extra_data.size());
ASSERT(nwritten == extra_data.size());
}
return true;
}
bool GEventLoop::wait_for_specific_event(WSAPI_ServerMessage::Type type, WSAPI_ServerMessage& event)
@ -357,10 +379,10 @@ bool GEventLoop::wait_for_specific_event(WSAPI_ServerMessage::Type type, WSAPI_S
bool success = drain_messages_from_server();
if (!success)
return false;
for (ssize_t i = 0; i < m_unprocessed_messages.size(); ++i) {
if (m_unprocessed_messages[i].type == type) {
event = move(m_unprocessed_messages[i]);
m_unprocessed_messages.remove(i);
for (ssize_t i = 0; i < m_unprocessed_bundles.size(); ++i) {
if (m_unprocessed_bundles[i].message.type == type) {
event = move(m_unprocessed_bundles[i].message);
m_unprocessed_bundles.remove(i);
return true;
}
}