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/*
Copyright (C) 2016 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_push2_canvas_h__
#define __ardour_push2_canvas_h__
#include <cairomm/refptr.h>
#include <glibmm/threads.h>
#include "canvas/canvas.h"
namespace Cairo {
class ImageSurface;
class Context;
class Region;
}
namespace ArdourSurface {
class Push2;
/* A canvas which renders to the Push2 display */
class Push2Canvas : public ArdourCanvas::Canvas
{
public:
Push2Canvas (Push2& p2, int cols, int rows);
~Push2Canvas();
void request_redraw ();
void request_redraw (ArdourCanvas::Rect const &);
bool vblank ();
Cairo::RefPtr<Cairo::Context> image_context() { return context; }
int rows() const { return _rows; }
int cols() const { return _cols; }
static double inter_button_spacing() { return 120.0; }
ArdourCanvas::Coord width() const { return cols(); }
ArdourCanvas::Coord height() const { return rows(); }
void request_size (ArdourCanvas::Duple);
ArdourCanvas::Rect visible_area () const;
/* API that does nothing since we have no input events */
void ungrab () {}
void grab (ArdourCanvas::Item*) {}
void focus (ArdourCanvas::Item*) {}
void unfocus (ArdourCanvas::Item*) {}
void re_enter() {}
void pick_current_item (int) {}
void pick_current_item (ArdourCanvas::Duple const &, int) {}
bool get_mouse_position (ArdourCanvas::Duple&) const { return false; }
Glib::RefPtr<Pango::Context> get_pango_context ();
private:
Push2& p2;
int _cols;
int _rows;
static const int pixels_per_row;
int pixel_area () const { return _rows * pixels_per_row; }
uint8_t sample_header[16];
uint16_t* device_sample_buffer;
Cairo::RefPtr<Cairo::ImageSurface> sample_buffer;
Cairo::RefPtr<Cairo::Context> context;
Cairo::RefPtr<Cairo::Region> expose_region;
Glib::RefPtr<Pango::Context> pango_context;
bool expose ();
int blit_to_device_sample_buffer ();
};
} /* namespace ArdourSurface */
#endif /* __ardour_push2_canvas_h__ */
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