mirror of https://github.com/ArduPilot/ardupilot
89 lines
2.0 KiB
C++
89 lines
2.0 KiB
C++
/*
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* This file is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the 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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <AP_HAL/HAL.h>
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#include <AP_OSD/AP_OSD.h>
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#include <AP_Filesystem/AP_Filesystem.h>
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class AP_OSD_Backend
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{
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public:
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//constructor
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AP_OSD_Backend(AP_OSD &osd): _osd(osd) {};
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//destructor
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virtual ~AP_OSD_Backend(void) {}
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//draw given text to framebuffer
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virtual void write(uint8_t x, uint8_t y, const char* text) = 0;
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//draw formatted text to framebuffer
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virtual void write(uint8_t x, uint8_t y, bool blink, const char *fmt, ...);
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//initilize framebuffer and underlying hardware
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virtual bool init() = 0;
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//update screen
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virtual void flush() = 0;
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// return a correction factor used to display angles correctly
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virtual float get_aspect_ratio_correction() const {return 1;}
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//clear screen
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//should match hw blink
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virtual void clear()
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{
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blink_phase = (blink_phase+1)%4;
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};
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AP_OSD * get_osd()
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{
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return &_osd;
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}
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protected:
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AP_OSD& _osd;
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// get font choice
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uint8_t get_font_num(void) const
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{
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return (uint8_t)_osd.font_num.get();
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}
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//check option
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bool check_option(uint32_t option) const
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{
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return (_osd.options & option) != 0;
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}
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// load a font from sdcard or ROMFS
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FileData *load_font_data(uint8_t font_num);
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int8_t blink_phase;
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enum vid_format {
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FORMAT_UNKNOWN = 0,
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FORMAT_NTSC = 1,
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FORMAT_PAL = 2,
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} _format;
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};
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