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45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
/*
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* (c) Philippe G. 2019, philippe_44@outlook.com
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*
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*/
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#pragma once
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#include "gds.h"
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/*
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The displayer is not thread-safe and the caller must ensure use its own
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mutexes if it wants something better. Especially, text() line() and draw()
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are not protected against each other.
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In text mode (text/line) when using DISPLAY_SUSPEND, the displayer will
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refreshed line 2 one last time before suspending itself. As a result if it
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is in a long sleep (scrolling pause), the refresh will happen after wakeup.
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So it can conflict with other display direct writes that have been made during
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sleep. Note that if DISPLAY_SHUTDOWN has been called meanwhile, it (almost)
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never happens
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The display_bus() shall be subscribed by other displayers so that at least
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when this one (the main) wants to take control over display, it can signal
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that to others
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*/
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extern struct GDS_Device *display;
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enum displayer_cmd_e { DISPLAYER_SHUTDOWN, DISPLAYER_ACTIVATE, DISPLAYER_SUSPEND, DISPLAYER_TIMER_PAUSE, DISPLAYER_TIMER_RUN };
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enum displayer_time_e { DISPLAYER_ELAPSED, DISPLAYER_REMAINING };
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enum display_bus_cmd_e { DISPLAY_BUS_TAKE, DISPLAY_BUS_GIVE };
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bool (*display_bus)(void *from, enum display_bus_cmd_e cmd);
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const char *display_conf_get_driver_name(const char * driver);
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bool display_is_valid_driver(const char * driver);
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void displayer_scroll(char *string, int speed, int pause);
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void displayer_control(enum displayer_cmd_e cmd, ...);
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void displayer_metadata(char *artist, char *album, char *title);
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void displayer_artwork(uint8_t *data);
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void displayer_timer(enum displayer_time_e mode, int elapsed, int duration);
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bool displayer_can_artwork(void);
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char * display_get_supported_drivers(void);
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