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livetrax/gtk2_ardour/plugin_display.cc
Robin Gareus 4050ca5633
Update GPL boilerplate and (C)
Copyright-holder and year information is extracted from git log.

git history begins in 2005. So (C) from 1998..2005 is lost. Also some
(C) assignment of commits where the committer didn't use --author.
2019-08-03 15:53:15 +02:00

189 lines
5.0 KiB
C++

/*
* Copyright (C) 2017 Johannes Mueller <github@johannes-mueller.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.
*/
#include <gtkmm/container.h>
#include "gtkmm2ext/colors.h"
#include "gtkmm2ext/gtk_ui.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/utils.h"
#include "ui_config.h"
#include "plugin_display.h"
PluginDisplay::PluginDisplay (boost::shared_ptr<ARDOUR::Plugin> p, uint32_t max_height)
: _plug (p)
, _surf (0)
, _max_height (max_height)
, _cur_height (1)
, _scroll (false)
{
add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
_plug->DropReferences.connect (_death_connection, invalidator (*this), boost::bind (&PluginDisplay::plugin_going_away, this), gui_context());
_plug->QueueDraw.connect (_qdraw_connection, invalidator (*this),
boost::bind (&Gtk::Widget::queue_draw, this), gui_context ());
}
PluginDisplay::~PluginDisplay ()
{
if (_surf) {
cairo_surface_destroy (_surf);
}
}
bool
PluginDisplay::on_button_press_event (GdkEventButton *ev)
{
return false;
}
bool
PluginDisplay::on_button_release_event (GdkEventButton *ev)
{
return false;
}
void
PluginDisplay::on_size_request (Gtk::Requisition* req)
{
req->width = 300;
req->height = _cur_height;
}
void
PluginDisplay::update_height_alloc (uint32_t height)
{
uint32_t shm = std::min (_max_height, height);
if (shm != _cur_height) {
_cur_height = shm;
queue_resize ();
}
}
uint32_t
PluginDisplay::render_inline (cairo_t* cr, uint32_t width)
{
ARDOUR::Plugin::Display_Image_Surface* dis = _plug->render_inline_display (width, _max_height);
if (!dis) {
return 0;
}
/* allocate a local image-surface,
* We cannot re-use the data via cairo_image_surface_create_for_data(),
* since pixman keeps a reference to it.
* we'd need to hand over the data and ha cairo_surface_destroy to free it.
* it might be possible to work around via cairo_surface_set_user_data().
*/
if (!_surf
|| dis->width != cairo_image_surface_get_width (_surf)
|| dis->height != cairo_image_surface_get_height (_surf)
) {
if (_surf) {
cairo_surface_destroy (_surf);
}
_surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, dis->width, dis->height);
}
if (cairo_image_surface_get_stride (_surf) == dis->stride) {
memcpy (cairo_image_surface_get_data (_surf), dis->data, dis->stride * dis->height);
} else {
unsigned char *src = dis->data;
unsigned char *dst = cairo_image_surface_get_data (_surf);
const int dst_stride = cairo_image_surface_get_stride (_surf);
for (int y = 0; y < dis->height; ++y) {
memcpy (dst, src, dis->width * 4 /*ARGB32*/);
src += dis->stride;
dst += dst_stride;
}
}
cairo_surface_flush(_surf);
cairo_surface_mark_dirty(_surf);
const double xc = floor ((width - dis->width) * .5);
cairo_set_source_surface(cr, _surf, xc, 0);
cairo_paint (cr);
return dis->height;
}
bool
PluginDisplay::on_expose_event (GdkEventExpose* ev)
{
Gtk::Allocation a = get_allocation();
double const width = a.get_width();
double const height = a.get_height();
cairo_t* cr = gdk_cairo_create (get_window()->gobj());
cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
cairo_clip (cr);
Gdk::Color const bg = get_style()->get_bg (Gtk::STATE_NORMAL);
cairo_set_source_rgb (cr, bg.get_red_p (), bg.get_green_p (), bg.get_blue_p ());
cairo_rectangle (cr, 0, 0, width, height);
cairo_fill (cr);
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
display_frame(cr, width, height);
cairo_clip (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
uint32_t ht = render_inline (cr, width);
cairo_restore (cr);
if (ht == 0) {
hide ();
if (_cur_height != 1) {
_cur_height = 1;
queue_resize ();
}
cairo_destroy (cr);
return true;
} else {
update_height_alloc (ht);
}
bool failed = false;
std::string name = get_name();
Gtkmm2ext::Color fill_color = UIConfiguration::instance().color (string_compose ("%1: fill active", name), &failed);
display_frame(cr, width, height);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_line_width(cr, 1.0);
if (failed) {
cairo_set_source_rgba (cr, .75, .75, .75, 1.0);
} else {
Gtkmm2ext::set_source_rgb_a (cr, fill_color, 1.0);
}
cairo_stroke (cr);
cairo_destroy(cr);
return true;
}
void
PluginDisplay::display_frame (cairo_t* cr, double w, double h)
{
cairo_rectangle (cr, 0.0, 0.0, w, h);
}