118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
/*
|
|
* \brief Graphics back end for example window decorator
|
|
* \author Norman Feske
|
|
* \date 2014-01-10
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2014 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _CANVAS_H_
|
|
#define _CANVAS_H_
|
|
|
|
/* Painters of the nitpicker and scout graphics backends */
|
|
#include <nitpicker_gfx/text_painter.h>
|
|
#include <nitpicker_gfx/box_painter.h>
|
|
#include <scout_gfx/icon_painter.h>
|
|
|
|
/* decorator includes */
|
|
#include <decorator/types.h>
|
|
|
|
namespace Decorator {
|
|
|
|
typedef Text_painter::Font Font;
|
|
Font &default_font();
|
|
|
|
enum Texture_id {
|
|
TEXTURE_ID_CLOSER,
|
|
TEXTURE_ID_MINIMIZE,
|
|
TEXTURE_ID_MAXIMIZE,
|
|
TEXTURE_ID_WINDOWED
|
|
};
|
|
|
|
Genode::Texture_base const &texture_by_id(Texture_id);
|
|
|
|
class Canvas_base;
|
|
template <typename PT> class Canvas;
|
|
class Clip_guard;
|
|
}
|
|
|
|
|
|
/**
|
|
* Abstract interface of graphics back end
|
|
*/
|
|
struct Decorator::Canvas_base
|
|
{
|
|
virtual Rect clip() const = 0;
|
|
virtual void clip(Rect) = 0;
|
|
virtual void draw_box(Rect, Color) = 0;
|
|
virtual void draw_text(Point, Font const &, Color, char const *) = 0;
|
|
virtual void draw_texture(Point, Texture_id) = 0;
|
|
};
|
|
|
|
|
|
template <typename PT>
|
|
class Decorator::Canvas : public Decorator::Canvas_base
|
|
{
|
|
private:
|
|
|
|
Genode::Surface<PT> _surface;
|
|
|
|
public:
|
|
|
|
Canvas(PT *base, Area size) : _surface(base, size) { }
|
|
|
|
Rect clip() const override { return _surface.clip(); }
|
|
|
|
void clip(Rect rect) override { _surface.clip(rect); }
|
|
|
|
void draw_box(Rect rect, Color color) override
|
|
{
|
|
Box_painter::paint(_surface, rect, color);
|
|
}
|
|
|
|
void draw_text(Point pos, Font const &font,
|
|
Color color, char const *string) override
|
|
{
|
|
Text_painter::paint(_surface, pos, font, color, string);
|
|
}
|
|
|
|
void draw_texture(Point pos, Texture_id id)
|
|
{
|
|
Genode::Texture<PT> const &texture =
|
|
static_cast<Genode::Texture<PT> const &>(texture_by_id(id));
|
|
|
|
unsigned const alpha = 255;
|
|
|
|
Icon_painter::paint(_surface, Rect(pos, texture.size()), texture, alpha);
|
|
|
|
}
|
|
};
|
|
|
|
|
|
class Decorator::Clip_guard : Rect
|
|
{
|
|
private:
|
|
|
|
Canvas_base &_canvas;
|
|
Rect const _orig_rect;
|
|
|
|
public:
|
|
|
|
Clip_guard(Canvas_base &canvas, Rect clip_rect)
|
|
:
|
|
_canvas(canvas), _orig_rect(canvas.clip())
|
|
{
|
|
_canvas.clip(Rect::intersect(_orig_rect, clip_rect));
|
|
}
|
|
|
|
~Clip_guard() { _canvas.clip(_orig_rect); }
|
|
};
|
|
|
|
#endif /* _CANVAS_H_ */
|
|
|