101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __ardour_push2_canvas_h__
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#define __ardour_push2_canvas_h__
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#include <cairomm/refptr.h>
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#include <glibmm/threads.h>
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#include "canvas/canvas.h"
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namespace Cairo {
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class ImageSurface;
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class Context;
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class Region;
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}
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namespace Pango {
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class Context;
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}
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namespace ArdourSurface {
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class Push2;
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/* A canvas which renders to the Push2 display */
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class Push2Canvas : public ArdourCanvas::Canvas
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{
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public:
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Push2Canvas (Push2& p2, int cols, int rows);
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~Push2Canvas();
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void request_redraw ();
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void request_redraw (ArdourCanvas::Rect const &);
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void queue_resize ();
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bool vblank ();
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Cairo::RefPtr<Cairo::Context> image_context() { return context; }
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int rows() const { return _rows; }
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int cols() const { return _cols; }
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static double inter_button_spacing() { return 120.0; }
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ArdourCanvas::Coord width() const { return cols(); }
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ArdourCanvas::Coord height() const { return rows(); }
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void request_size (ArdourCanvas::Duple);
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ArdourCanvas::Rect visible_area () const;
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/* API that does nothing since we have no input events */
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void ungrab () {}
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void grab (ArdourCanvas::Item*) {}
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void focus (ArdourCanvas::Item*) {}
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void unfocus (ArdourCanvas::Item*) {}
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void re_enter() {}
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void pick_current_item (int) {}
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void pick_current_item (ArdourCanvas::Duple const &, int) {}
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bool get_mouse_position (ArdourCanvas::Duple&) const { return false; }
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Glib::RefPtr<Pango::Context> get_pango_context ();
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private:
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Push2& p2;
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int _cols;
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int _rows;
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static const int pixels_per_row;
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int pixel_area () const { return _rows * pixels_per_row; }
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uint8_t sample_header[16];
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uint16_t* device_sample_buffer;
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Cairo::RefPtr<Cairo::ImageSurface> sample_buffer;
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Cairo::RefPtr<Cairo::Context> context;
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Cairo::RefPtr<Cairo::Region> expose_region;
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Glib::RefPtr<Pango::Context> pango_context;
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bool expose ();
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int blit_to_device_sample_buffer ();
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};
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} /* namespace ArdourSurface */
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#endif /* __ardour_push2_canvas_h__ */
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