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added some comments and fixed a double-draw performance bug

master
Bartosz Kostrzewa 2011-05-13 11:54:45 +02:00
parent 40cf23e1d4
commit 131484bb4d
1 changed files with 15 additions and 8 deletions
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17
displayclient/Renderer.cpp
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@ -6,8 +6,11 @@
Renderer::Renderer()
{
Glib::signal_timeout().connect( sigc::mem_fun(*this, &Renderer::on_timeout), 34 );
// this determines the refresh rate
Glib::signal_timeout().connect( sigc::mem_fun(*this, &Renderer::on_timeout), 10 );
// drawing in GTK+ is done in the "expose_event" signal handler
#ifndef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
//Connect the signal handler if it isn't already a virtual method override:
signal_expose_event().connect(sigc::mem_fun(*this, &Renderer::on_expose_event), false);
@ -20,6 +23,7 @@ Renderer::Renderer()
invalid.ymin = get_height();
invalid.width = invalid.height = 0;
// launch the udp listener
Glib::Thread::create( sigc::mem_fun(this, &Renderer::listen), false);
}
@ -68,31 +72,33 @@ bool Renderer::on_expose_event(GdkEventExpose *event)
cr->clip();
}
// rescale coordinates of the drawing context to 1.0 1.0
cr->scale(width,height);
// fill the backdrop
cr->set_source_rgb(0.3,0.3,0.3);
cr->paint();
cr->set_line_width(0.05);
// geometry of the building face
double window_width = 0.04;
double window_height = 0.08;
double window_hsep = 0.03;
double window_vsep = 0.04;
// draw the windows
for(int i = 0; i < HEIGHT; i++)
{
for(int j = 0; j < WIDTH; j++)
{
for(int a = 0; a < CHANNELS; a++)
{
cr->set_source_rgb( (double)f.windows[i][j][0]/255, (double)f.windows[i][j][0]/255, (double)f.windows[i][j][0]/255 );
cr->rectangle( window_hsep + j*(window_hsep+window_width) , window_vsep + i*(window_height+window_vsep), window_width, window_height );
cr->fill();
}
}
}
// draw the segments
for(int w = 0; w < SEGWIDTH; w++ )
{
for(int n = 0;n < SEGNUM; n++)
@ -166,6 +172,7 @@ void Renderer::draw_vsegment(double x, double y, double t, double l, double r, d
cr->fill();
}
// this signal handler tells gtk+ to redraw the window contents
bool Renderer::on_timeout()
{
/*static*/ Glib::RefPtr<Gdk::Window> win;
@ -229,7 +236,7 @@ void Renderer::listen()
}
}
}
} // lock is released here because the block ends
} // lock is released here because we will not access object-wide resources anymore
if (error && error != boost::asio::error::message_size)
throw boost::system::system_error(error);