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livetrax/gtk2_ardour/vst3_x11_plugin_ui.cc

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/*
* Copyright (C) 2020 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef WAF_BUILD
#include "gtk2ardour-config.h"
#endif
#include <boost/unordered_map.hpp>
#include <glibmm/main.h>
#include <glibmm/threads.h>
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#include <gtkmm/socket.h>
#include "pbd/unwind.h"
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#include "ardour/plugin_insert.h"
#include "ardour/vst3_plugin.h"
#include "gtkmm2ext/gui_thread.h"
#include "vst3_x11_plugin_ui.h"
#include <gdk/gdkx.h> /* must come later than glibmm/object.h */
using namespace ARDOUR;
using namespace Steinberg;
class VST3X11Runloop : public Linux::IRunLoop
{
private:
struct EventHandler
{
EventHandler (Linux::IEventHandler* handler = 0, GIOChannel* gio_channel = 0, guint source_id = 0)
: _handler (handler)
, _gio_channel (gio_channel)
, _source_id (source_id)
{}
bool operator== (EventHandler const& other) {
return other._handler == _handler && other._gio_channel == _gio_channel && other._source_id == _source_id;
}
Linux::IEventHandler* _handler;
GIOChannel* _gio_channel;
guint _source_id;
};
boost::unordered_map<FileDescriptor, EventHandler> _event_handlers;
boost::unordered_map<guint, Linux::ITimerHandler*> _timer_handlers;
static gboolean event (GIOChannel* source, GIOCondition condition, gpointer data)
{
Linux::IEventHandler* handler = reinterpret_cast<Linux::IEventHandler*> (data);
handler->onFDIsSet (g_io_channel_unix_get_fd (source));
if (condition & ~G_IO_IN) {
/* remove on error */
return false;
} else {
return true;
}
}
static gboolean timeout (gpointer data)
{
Linux::ITimerHandler* handler = reinterpret_cast<Linux::ITimerHandler*> (data);
handler->onTimer ();
return true;
}
public:
~VST3X11Runloop ()
{
clear ();
}
void clear () {
Glib::Threads::Mutex::Lock lm (_lock);
for (boost::unordered_map<FileDescriptor, EventHandler>::const_iterator it = _event_handlers.begin (); it != _event_handlers.end (); ++it) {
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g_source_remove (it->second._source_id);
g_io_channel_unref (it->second._gio_channel);
}
for (boost::unordered_map<guint, Linux::ITimerHandler*>::const_iterator it = _timer_handlers.begin (); it != _timer_handlers.end (); ++it) {
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g_source_remove (it->first);
}
_event_handlers.clear ();
_timer_handlers.clear ();
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}
/* VST3 IRunLoop interface */
tresult registerEventHandler (Linux::IEventHandler* handler, FileDescriptor fd) SMTG_OVERRIDE
{
if (!handler || _event_handlers.find(fd) != _event_handlers.end()) {
return kInvalidArgument;
}
Glib::Threads::Mutex::Lock lm (_lock);
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GIOChannel* gio_channel = g_io_channel_unix_new (fd);
guint id = g_io_add_watch (gio_channel, (GIOCondition) (G_IO_IN /*| G_IO_OUT*/ | G_IO_ERR | G_IO_HUP), event, handler);
_event_handlers[fd] = EventHandler (handler, gio_channel, id);
return kResultTrue;
}
tresult unregisterEventHandler (Linux::IEventHandler* handler) SMTG_OVERRIDE
{
if (!handler) {
return kInvalidArgument;
}
tresult rv = false;
Glib::Threads::Mutex::Lock lm (_lock);
for (boost::unordered_map<FileDescriptor, EventHandler>::const_iterator it = _event_handlers.begin (); it != _event_handlers.end ();) {
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if (it->second._handler == handler) {
g_source_remove (it->second._source_id);
g_io_channel_unref (it->second._gio_channel);
it = _event_handlers.erase (it);
rv = kResultTrue;
} else {
++it;
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}
}
return rv;
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}
tresult registerTimer (Linux::ITimerHandler* handler, TimerInterval milliseconds) SMTG_OVERRIDE
{
if (!handler || milliseconds == 0) {
return kInvalidArgument;
}
Glib::Threads::Mutex::Lock lm (_lock);
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guint id = g_timeout_add_full (G_PRIORITY_HIGH_IDLE, milliseconds, timeout, handler, NULL);
_timer_handlers[id] = handler;
return kResultTrue;
}
tresult unregisterTimer (Linux::ITimerHandler* handler) SMTG_OVERRIDE
{
if (!handler) {
return kInvalidArgument;
}
tresult rv = false;
Glib::Threads::Mutex::Lock lm (_lock);
for (boost::unordered_map<guint, Linux::ITimerHandler*>::const_iterator it = _timer_handlers.begin (); it != _timer_handlers.end ();) {
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if (it->second == handler) {
g_source_remove (it->first);
it = _timer_handlers.erase (it);
rv = kResultTrue;
} else {
++it;
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}
}
return rv;
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}
uint32 PLUGIN_API addRef () SMTG_OVERRIDE { return 1; }
uint32 PLUGIN_API release () SMTG_OVERRIDE { return 1; }
tresult queryInterface (const TUID, void**) SMTG_OVERRIDE { return kNoInterface; }
private:
Glib::Threads::Mutex _lock;
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};
VST3X11Runloop static_runloop;
VST3X11PluginUI::VST3X11PluginUI (std::shared_ptr<PlugInsertBase> pib, std::shared_ptr<VST3Plugin> vst3)
: VST3PluginUI (pib, vst3)
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//, _runloop (new VST3X11Runloop)
{
_vst3->set_runloop (&static_runloop);
pack_start (_gui_widget, true, true);
_gui_widget.signal_realize().connect (mem_fun (this, &VST3X11PluginUI::view_realized));
_gui_widget.signal_size_request ().connect (mem_fun (this, &VST3X11PluginUI::view_size_request));
_gui_widget.signal_size_allocate ().connect (mem_fun (this, &VST3X11PluginUI::view_size_allocate));
_gui_widget.signal_scroll_event ().connect (sigc::mem_fun (*this, &VST3X11PluginUI::forward_scroll_event), false);
#if 0
_gui_widget.add_events (Gdk::POINTER_MOTION_HINT_MASK | Gdk::SCROLL_MASK | Gdk::KEY_PRESS_MASK | Gdk::KEY_RELEASE_MASK | Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|Gdk::SCROLL_MASK);
#endif
_gui_widget.show ();
}
VST3X11PluginUI::~VST3X11PluginUI ()
{
assert (_view_realized);
_vst3->close_view ();
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}
void
VST3X11PluginUI::view_realized ()
{
IPlugView* view = _vst3->view ();
if (!view) {
return;
}
Window window = _gui_widget.get_id ();
if (kResultOk != view->attached (reinterpret_cast<void*> (window), Steinberg::kPlatformTypeX11EmbedWindowID)) {
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assert (0);
}
_view_realized = true;
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#if 0
_gui_widget.set_sensitive (true);
_gui_widget.set_can_focus (true);
_gui_widget.grab_focus ();
#endif
ViewRect rect;
if (view->getSize (&rect) == kResultOk) {
_req_width = rect.right - rect.left;
_req_height = rect.bottom - rect.top;
}
_gui_widget.queue_resize ();
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}
void
VST3X11PluginUI::view_size_request (GtkRequisition* requisition)
{
requisition->width = _req_width;
requisition->height = _req_height;
}
void
VST3X11PluginUI::view_size_allocate (Gtk::Allocation& allocation)
{
IPlugView* view = _vst3->view ();
if (!view || !_view_realized) {
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return;
}
PBD::Unwinder<bool> uw (_resize_in_progress, true);
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ViewRect rect;
if (view->getSize (&rect) == kResultOk
&& ! (rect.right - rect.left == allocation.get_width () && rect.bottom - rect.top == allocation.get_height ()))
{
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rect.right = rect.left + allocation.get_width ();
rect.bottom = rect.top + allocation.get_height ();
#if 0
if (view->checkSizeConstraint (&rect) != kResultTrue) {
view->getSize (&rect);
}
allocation.set_width (rect.right - rect.left);
allocation.set_height (rect.bottom - rect.top);
#endif
if (view->canResize() == kResultTrue) {
view->onSize (&rect);
}
}
}
void
VST3X11PluginUI::resize_callback (int width, int height)
{
// printf ("VST3X11PluginUI::resize_callback %d x %d\n", width, height);
IPlugView* view = _vst3->view ();
if (!view || _resize_in_progress) {
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return;
}
if (view->canResize() == kResultTrue) {
gint xx, yy;
if (gtk_widget_translate_coordinates (
GTK_WIDGET(_gui_widget.gobj()),
GTK_WIDGET(get_toplevel()->gobj()),
0, 0, &xx, &yy))
{
get_window()->resize (width + xx, height + yy);
}
} else {
_req_width = width;
_req_height = height;
_gui_widget.queue_resize ();
}
}
bool
VST3X11PluginUI::on_window_show (const std::string& /*title*/)
{
IPlugView* view = _vst3->view ();
if (!view) {
return false;
}
gtk_widget_realize (GTK_WIDGET(_gui_widget.gobj()));
_gui_widget.show_all ();
_gui_widget.queue_resize ();
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return true;
}
void
VST3X11PluginUI::on_window_hide ()
{
_gui_widget.hide ();
}
void
VST3X11PluginUI::grab_focus ()
{
#if 1
IPlugView* view = _vst3->view ();
if (view) {
view->onFocus (true);
}
#endif
}