You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
602 lines
21 KiB
602 lines
21 KiB
/**
|
|
* @file lv_disp.h
|
|
*
|
|
*/
|
|
|
|
#ifndef LV_DISPLAY_H
|
|
#define LV_DISPLAY_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*********************
|
|
* INCLUDES
|
|
*********************/
|
|
#include "../misc/lv_types.h"
|
|
#include "../misc/lv_timer.h"
|
|
#include "../misc/lv_event.h"
|
|
#include "../misc/lv_color.h"
|
|
#include "../draw/lv_draw.h"
|
|
|
|
/*********************
|
|
* DEFINES
|
|
*********************/
|
|
|
|
#ifndef LV_ATTRIBUTE_FLUSH_READY
|
|
#define LV_ATTRIBUTE_FLUSH_READY
|
|
#endif
|
|
|
|
/**********************
|
|
* TYPEDEFS
|
|
**********************/
|
|
|
|
typedef enum {
|
|
LV_DISPLAY_ROTATION_0 = 0,
|
|
LV_DISPLAY_ROTATION_90,
|
|
LV_DISPLAY_ROTATION_180,
|
|
LV_DISPLAY_ROTATION_270
|
|
} lv_display_rotation_t;
|
|
|
|
typedef enum {
|
|
/**
|
|
* Use the buffer(s) to render the screen is smaller parts.
|
|
* This way the buffers can be smaller then the display to save RAM. At least 1/10 screen size buffer(s) are recommended.
|
|
*/
|
|
LV_DISPLAY_RENDER_MODE_PARTIAL,
|
|
|
|
/**
|
|
* The buffer(s) has to be screen sized and LVGL will render into the correct location of the buffer.
|
|
* This way the buffer always contain the whole image. Only the changed ares will be updated.
|
|
* With 2 buffers the buffers' content are kept in sync automatically and in flush_cb only address change is required.
|
|
*/
|
|
LV_DISPLAY_RENDER_MODE_DIRECT,
|
|
|
|
/**
|
|
* Always redraw the whole screen even if only one pixel has been changed.
|
|
* With 2 buffers in flush_cb only and address change is required.
|
|
*/
|
|
LV_DISPLAY_RENDER_MODE_FULL,
|
|
} lv_display_render_mode_t;
|
|
|
|
typedef enum {
|
|
LV_SCR_LOAD_ANIM_NONE,
|
|
LV_SCR_LOAD_ANIM_OVER_LEFT,
|
|
LV_SCR_LOAD_ANIM_OVER_RIGHT,
|
|
LV_SCR_LOAD_ANIM_OVER_TOP,
|
|
LV_SCR_LOAD_ANIM_OVER_BOTTOM,
|
|
LV_SCR_LOAD_ANIM_MOVE_LEFT,
|
|
LV_SCR_LOAD_ANIM_MOVE_RIGHT,
|
|
LV_SCR_LOAD_ANIM_MOVE_TOP,
|
|
LV_SCR_LOAD_ANIM_MOVE_BOTTOM,
|
|
LV_SCR_LOAD_ANIM_FADE_IN,
|
|
LV_SCR_LOAD_ANIM_FADE_ON = LV_SCR_LOAD_ANIM_FADE_IN, /*For backward compatibility*/
|
|
LV_SCR_LOAD_ANIM_FADE_OUT,
|
|
LV_SCR_LOAD_ANIM_OUT_LEFT,
|
|
LV_SCR_LOAD_ANIM_OUT_RIGHT,
|
|
LV_SCR_LOAD_ANIM_OUT_TOP,
|
|
LV_SCR_LOAD_ANIM_OUT_BOTTOM,
|
|
} lv_screen_load_anim_t;
|
|
|
|
typedef void (*lv_display_flush_cb_t)(lv_display_t * disp, const lv_area_t * area, uint8_t * px_map);
|
|
typedef void (*lv_display_flush_wait_cb_t)(lv_display_t * disp);
|
|
|
|
/**********************
|
|
* GLOBAL PROTOTYPES
|
|
**********************/
|
|
|
|
/**
|
|
* Create a new display with the given resolution
|
|
* @param hor_res horizontal resolution in pixels
|
|
* @param ver_res vertical resolution in pixels
|
|
* @return pointer to a display object or `NULL` on error
|
|
*/
|
|
lv_display_t * lv_display_create(int32_t hor_res, int32_t ver_res);
|
|
|
|
/**
|
|
* Remove a display
|
|
* @param disp pointer to display
|
|
*/
|
|
void lv_display_delete(lv_display_t * disp);
|
|
|
|
/**
|
|
* Set a default display. The new screens will be created on it by default.
|
|
* @param disp pointer to a display
|
|
*/
|
|
void lv_display_set_default(lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the default display
|
|
* @return pointer to the default display
|
|
*/
|
|
lv_display_t * lv_display_get_default(void);
|
|
|
|
/**
|
|
* Get the next display.
|
|
* @param disp pointer to the current display. NULL to initialize.
|
|
* @return the next display or NULL if no more. Gives the first display when the parameter is NULL.
|
|
*/
|
|
lv_display_t * lv_display_get_next(lv_display_t * disp);
|
|
|
|
/*---------------------
|
|
* RESOLUTION
|
|
*--------------------*/
|
|
|
|
/**
|
|
* Sets the resolution of a display. `LV_EVENT_RESOLUTION_CHANGED` event will be sent.
|
|
* Here the native resolution of the device should be set. If the display will be rotated later with
|
|
* `lv_display_set_rotation` LVGL will swap the hor. and ver. resolution automatically.
|
|
* @param disp pointer to a display
|
|
* @param hor_res the new horizontal resolution
|
|
* @param ver_res the new vertical resolution
|
|
*/
|
|
void lv_display_set_resolution(lv_display_t * disp, int32_t hor_res, int32_t ver_res);
|
|
|
|
/**
|
|
* It's not mandatory to use the whole display for LVGL, however in some cases physical resolution is important.
|
|
* For example the touchpad still sees whole resolution and the values needs to be converted
|
|
* to the active LVGL display area.
|
|
* @param disp pointer to a display
|
|
* @param hor_res the new physical horizontal resolution, or -1 to assume it's the same as the normal hor. res.
|
|
* @param ver_res the new physical vertical resolution, or -1 to assume it's the same as the normal hor. res.
|
|
*/
|
|
void lv_display_set_physical_resolution(lv_display_t * disp, int32_t hor_res, int32_t ver_res);
|
|
|
|
/**
|
|
* If physical resolution is not the same as the normal resolution
|
|
* the offset of the active display area can be set here.
|
|
* @param disp pointer to a display
|
|
* @param x X offset
|
|
* @param y Y offset
|
|
*/
|
|
void lv_display_set_offset(lv_display_t * disp, int32_t x, int32_t y);
|
|
|
|
/**
|
|
* Set the rotation of this display. LVGL will swap the horizontal and vertical resolutions internally.
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @param rotation `LV_DISPLAY_ROTATION_0/90/180/270`
|
|
*/
|
|
void lv_display_set_rotation(lv_display_t * disp, lv_display_rotation_t rotation);
|
|
|
|
/**
|
|
* Set the DPI (dot per inch) of the display.
|
|
* dpi = sqrt(hor_res^2 + ver_res^2) / diagonal"
|
|
* @param disp pointer to a display
|
|
* @param dpi the new DPI
|
|
*/
|
|
void lv_display_set_dpi(lv_display_t * disp, int32_t dpi);
|
|
|
|
/**
|
|
* Get the horizontal resolution of a display.
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the horizontal resolution of the display.
|
|
*/
|
|
int32_t lv_display_get_horizontal_resolution(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the vertical resolution of a display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the vertical resolution of the display
|
|
*/
|
|
int32_t lv_display_get_vertical_resolution(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the physical horizontal resolution of a display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the physical horizontal resolution of the display
|
|
*/
|
|
int32_t lv_display_get_physical_horizontal_resolution(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the physical vertical resolution of a display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the physical vertical resolution of the display
|
|
*/
|
|
int32_t lv_display_get_physical_vertical_resolution(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the horizontal offset from the full / physical display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the horizontal offset from the physical display
|
|
*/
|
|
int32_t lv_display_get_offset_x(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the vertical offset from the full / physical display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the horizontal offset from the physical display
|
|
*/
|
|
int32_t lv_display_get_offset_y(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the current rotation of this display.
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return the current rotation
|
|
*/
|
|
lv_display_rotation_t lv_display_get_rotation(lv_display_t * disp);
|
|
|
|
/**
|
|
* Get the DPI of the display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return dpi of the display
|
|
*/
|
|
int32_t lv_display_get_dpi(const lv_display_t * disp);
|
|
|
|
/*---------------------
|
|
* BUFFERING
|
|
*--------------------*/
|
|
|
|
/**
|
|
* Set the buffers for a display, similarly to `lv_display_set_draw_buffers`, but accept the raw buffer pointers.
|
|
* @param disp pointer to a display
|
|
* @param buf1 first buffer
|
|
* @param buf2 second buffer (can be `NULL`)
|
|
* @param buf_size buffer size in byte
|
|
* @param render_mode LV_DISPLAY_RENDER_MODE_PARTIAL/DIRECT/FULL
|
|
*/
|
|
void lv_display_set_buffers(lv_display_t * disp, void * buf1, void * buf2, uint32_t buf_size,
|
|
lv_display_render_mode_t render_mode);
|
|
|
|
/**
|
|
* Set the buffers for a display, accept a draw buffer pointer.
|
|
* Normally use `lv_display_set_buffers` is enough for most cases.
|
|
* Use this function when an existing lv_draw_buf_t is available.
|
|
* @param disp pointer to a display
|
|
* @param buf1 first buffer
|
|
* @param buf2 second buffer (can be `NULL`)
|
|
*/
|
|
void lv_display_set_draw_buffers(lv_display_t * disp, lv_draw_buf_t * buf1, lv_draw_buf_t * buf2);
|
|
|
|
/**
|
|
* Set display render mode
|
|
* @param disp pointer to a display
|
|
* @param render_mode LV_DISPLAY_RENDER_MODE_PARTIAL/DIRECT/FULL
|
|
*/
|
|
void lv_display_set_render_mode(lv_display_t * disp, lv_display_render_mode_t render_mode);
|
|
|
|
/**
|
|
* Set the flush callback which will be called to copy the rendered image to the display.
|
|
* @param disp pointer to a display
|
|
* @param flush_cb the flush callback (`px_map` contains the rendered image as raw pixel map and it should be copied to `area` on the display)
|
|
*/
|
|
void lv_display_set_flush_cb(lv_display_t * disp, lv_display_flush_cb_t flush_cb);
|
|
|
|
/**
|
|
* Set a callback to be used while LVGL is waiting flushing to be finished.
|
|
* It can do any complex logic to wait, including semaphores, mutexes, polling flags, etc.
|
|
* If not set the `disp->flushing` flag is used which can be cleared with `lv_display_flush_ready()`
|
|
* @param disp pointer to a display
|
|
* @param wait_cb a callback to call while LVGL is waiting for flush ready.
|
|
* If NULL `lv_display_flush_ready()` can be used to signal that flushing is ready.
|
|
*/
|
|
void lv_display_set_flush_wait_cb(lv_display_t * disp, lv_display_flush_wait_cb_t wait_cb);
|
|
|
|
/**
|
|
* Set the color format of the display.
|
|
* @param disp pointer to a display
|
|
* @param color_format Possible values are
|
|
* - LV_COLOR_FORMAT_RGB565
|
|
* - LV_COLOR_FORMAT_RGB888
|
|
* - LV_COLOR_FORMAT_XRGB888
|
|
* - LV_COLOR_FORMAT_ARGB888
|
|
*@note To change the endianness of the rendered image in case of RGB565 format
|
|
* (i.e. swap the 2 bytes) call `lv_draw_sw_rgb565_swap` in the flush_cb
|
|
*/
|
|
void lv_display_set_color_format(lv_display_t * disp, lv_color_format_t color_format);
|
|
|
|
/**
|
|
* Get the color format of the display
|
|
* @param disp pointer to a display
|
|
* @return the color format
|
|
*/
|
|
lv_color_format_t lv_display_get_color_format(lv_display_t * disp);
|
|
|
|
/**
|
|
* Enable anti-aliasing for the render engine
|
|
* @param disp pointer to a display
|
|
* @param en true/false
|
|
*/
|
|
void lv_display_set_antialiasing(lv_display_t * disp, bool en);
|
|
|
|
/**
|
|
* Get if anti-aliasing is enabled for a display or not
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return true/false
|
|
*/
|
|
bool lv_display_get_antialiasing(lv_display_t * disp);
|
|
|
|
//! @cond Doxygen_Suppress
|
|
|
|
/**
|
|
* Call from the display driver when the flushing is finished
|
|
* @param disp pointer to display whose `flush_cb` was called
|
|
*/
|
|
LV_ATTRIBUTE_FLUSH_READY void lv_display_flush_ready(lv_display_t * disp);
|
|
|
|
/**
|
|
* Tell if it's the last area of the refreshing process.
|
|
* Can be called from `flush_cb` to execute some special display refreshing if needed when all areas area flushed.
|
|
* @param disp pointer to display
|
|
* @return true: it's the last area to flush;
|
|
* false: there are other areas too which will be refreshed soon
|
|
*/
|
|
LV_ATTRIBUTE_FLUSH_READY bool lv_display_flush_is_last(lv_display_t * disp);
|
|
|
|
//! @endcond
|
|
|
|
bool lv_display_is_double_buffered(lv_display_t * disp);
|
|
|
|
/*---------------------
|
|
* SCREENS
|
|
*--------------------*/
|
|
|
|
/**
|
|
* Return a pointer to the active screen on a display
|
|
* @param disp pointer to display which active screen should be get.
|
|
* (NULL to use the default screen)
|
|
* @return pointer to the active screen object (loaded by 'lv_screen_load()')
|
|
*/
|
|
lv_obj_t * lv_display_get_screen_active(lv_display_t * disp);
|
|
|
|
/**
|
|
* Return with a pointer to the previous screen. Only used during screen transitions.
|
|
* @param disp pointer to display which previous screen should be get.
|
|
* (NULL to use the default screen)
|
|
* @return pointer to the previous screen object or NULL if not used now
|
|
*/
|
|
lv_obj_t * lv_display_get_screen_prev(lv_display_t * disp);
|
|
|
|
/**
|
|
* Return the top layer. The top layer is the same on all screens and it is above the normal screen layer.
|
|
* @param disp pointer to display which top layer should be get. (NULL to use the default screen)
|
|
* @return pointer to the top layer object
|
|
*/
|
|
lv_obj_t * lv_display_get_layer_top(lv_display_t * disp);
|
|
|
|
/**
|
|
* Return the sys. layer. The system layer is the same on all screen and it is above the normal screen and the top layer.
|
|
* @param disp pointer to display which sys. layer should be retrieved. (NULL to use the default screen)
|
|
* @return pointer to the sys layer object
|
|
*/
|
|
lv_obj_t * lv_display_get_layer_sys(lv_display_t * disp);
|
|
|
|
/**
|
|
* Return the bottom layer. The bottom layer is the same on all screen and it is under the normal screen layer.
|
|
* It's visible only if the the screen is transparent.
|
|
* @param disp pointer to display (NULL to use the default screen)
|
|
* @return pointer to the bottom layer object
|
|
*/
|
|
lv_obj_t * lv_display_get_layer_bottom(lv_display_t * disp);
|
|
|
|
/**
|
|
* Load a screen on the default display
|
|
* @param scr pointer to a screen
|
|
*/
|
|
void lv_screen_load(struct _lv_obj_t * scr);
|
|
|
|
/**
|
|
* Switch screen with animation
|
|
* @param scr pointer to the new screen to load
|
|
* @param anim_type type of the animation from `lv_screen_load_anim_t`, e.g. `LV_SCR_LOAD_ANIM_MOVE_LEFT`
|
|
* @param time time of the animation
|
|
* @param delay delay before the transition
|
|
* @param auto_del true: automatically delete the old screen
|
|
*/
|
|
void lv_screen_load_anim(lv_obj_t * scr, lv_screen_load_anim_t anim_type, uint32_t time, uint32_t delay,
|
|
bool auto_del);
|
|
|
|
/**
|
|
* Get the active screen of the default display
|
|
* @return pointer to the active screen
|
|
*/
|
|
static inline lv_obj_t * lv_screen_active(void)
|
|
{
|
|
return lv_display_get_screen_active(lv_display_get_default());
|
|
}
|
|
|
|
/**
|
|
* Get the top layer of the default display
|
|
* @return pointer to the top layer
|
|
*/
|
|
static inline lv_obj_t * lv_layer_top(void)
|
|
{
|
|
return lv_display_get_layer_top(lv_display_get_default());
|
|
}
|
|
|
|
/**
|
|
* Get the system layer of the default display
|
|
* @return pointer to the sys layer
|
|
*/
|
|
static inline lv_obj_t * lv_layer_sys(void)
|
|
{
|
|
return lv_display_get_layer_sys(lv_display_get_default());
|
|
}
|
|
|
|
/**
|
|
* Get the bottom layer of the default display
|
|
* @return pointer to the bottom layer
|
|
*/
|
|
static inline lv_obj_t * lv_layer_bottom(void)
|
|
{
|
|
return lv_display_get_layer_bottom(lv_display_get_default());
|
|
}
|
|
|
|
/*---------------------
|
|
* OTHERS
|
|
*--------------------*/
|
|
|
|
/**
|
|
* Add an event handler to the display
|
|
* @param disp pointer to a display
|
|
* @param event_cb an event callback
|
|
* @param filter event code to react or `LV_EVENT_ALL`
|
|
* @param user_data optional user_data
|
|
*/
|
|
void lv_display_add_event_cb(lv_display_t * disp, lv_event_cb_t event_cb, lv_event_code_t filter, void * user_data);
|
|
|
|
/**
|
|
* Get the number of event attached to a display
|
|
* @param disp pointer to a display
|
|
* @return number of events
|
|
*/
|
|
uint32_t lv_display_get_event_count(lv_display_t * disp);
|
|
|
|
/**
|
|
* Get an event descriptor for an event
|
|
* @param disp pointer to a display
|
|
* @param index the index of the event
|
|
* @return the event descriptor
|
|
*/
|
|
lv_event_dsc_t * lv_display_get_event_dsc(lv_display_t * disp, uint32_t index);
|
|
|
|
/**
|
|
* Remove an event
|
|
* @param disp pointer to a display
|
|
* @param index the index of the event to remove
|
|
* @return true: and event was removed; false: no event was removed
|
|
*/
|
|
bool lv_display_delete_event(lv_display_t * disp, uint32_t index);
|
|
|
|
/**
|
|
* Remove an event_cb with user_data
|
|
* @param disp pointer to a display
|
|
* @param event_cb the event_cb of the event to remove
|
|
* @param user_data user_data
|
|
* @return the count of the event removed
|
|
*/
|
|
uint32_t lv_display_remove_event_cb_with_user_data(lv_display_t * disp, lv_event_cb_t event_cb, void * user_data);
|
|
|
|
/**
|
|
* Send an event to a display
|
|
* @param disp pointer to a display
|
|
* @param code an event code. LV_EVENT_...
|
|
* @param param optional param
|
|
* @return LV_RESULT_OK: disp wasn't deleted in the event.
|
|
*/
|
|
lv_result_t lv_display_send_event(lv_display_t * disp, lv_event_code_t code, void * param);
|
|
|
|
/**
|
|
* Set the theme of a display. If there are no user created widgets yet the screens' theme will be updated
|
|
* @param disp pointer to a display
|
|
* @param th pointer to a theme
|
|
*/
|
|
void lv_display_set_theme(lv_display_t * disp, lv_theme_t * th);
|
|
|
|
/**
|
|
* Get the theme of a display
|
|
* @param disp pointer to a display
|
|
* @return the display's theme (can be NULL)
|
|
*/
|
|
lv_theme_t * lv_display_get_theme(lv_display_t * disp);
|
|
|
|
/**
|
|
* Get elapsed time since last user activity on a display (e.g. click)
|
|
* @param disp pointer to a display (NULL to get the overall smallest inactivity)
|
|
* @return elapsed ticks (milliseconds) since the last activity
|
|
*/
|
|
uint32_t lv_display_get_inactive_time(const lv_display_t * disp);
|
|
|
|
/**
|
|
* Manually trigger an activity on a display
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
*/
|
|
void lv_display_trigger_activity(lv_display_t * disp);
|
|
|
|
/**
|
|
* Temporarily enable and disable the invalidation of the display.
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @param en true: enable invalidation; false: invalidation
|
|
*/
|
|
void lv_display_enable_invalidation(lv_display_t * disp, bool en);
|
|
|
|
/**
|
|
* Get display invalidation is enabled.
|
|
* @param disp pointer to a display (NULL to use the default display)
|
|
* @return return true if invalidation is enabled
|
|
*/
|
|
bool lv_display_is_invalidation_enabled(lv_display_t * disp);
|
|
|
|
/**
|
|
* Get a pointer to the screen refresher timer to
|
|
* modify its parameters with `lv_timer_...` functions.
|
|
* @param disp pointer to a display
|
|
* @return pointer to the display refresher timer. (NULL on error)
|
|
*/
|
|
lv_timer_t * lv_display_get_refr_timer(lv_display_t * disp);
|
|
|
|
/**
|
|
* Delete screen refresher timer
|
|
* @param disp pointer to a display
|
|
*/
|
|
void lv_display_delete_refr_timer(lv_display_t * disp);
|
|
|
|
void lv_display_set_user_data(lv_display_t * disp, void * user_data);
|
|
void lv_display_set_driver_data(lv_display_t * disp, void * driver_data);
|
|
void * lv_display_get_user_data(lv_display_t * disp);
|
|
void * lv_display_get_driver_data(lv_display_t * disp);
|
|
lv_draw_buf_t * lv_display_get_buf_active(lv_display_t * disp);
|
|
|
|
/**********************
|
|
* MACROS
|
|
**********************/
|
|
|
|
/*------------------------------------------------
|
|
* To improve backward compatibility
|
|
* Recommended only if you have one display
|
|
*------------------------------------------------*/
|
|
|
|
#ifndef LV_HOR_RES
|
|
/**
|
|
* The horizontal resolution of the currently active display.
|
|
*/
|
|
#define LV_HOR_RES lv_display_get_horizontal_resolution(lv_display_get_default())
|
|
#endif
|
|
|
|
#ifndef LV_VER_RES
|
|
/**
|
|
* The vertical resolution of the currently active display.
|
|
*/
|
|
#define LV_VER_RES lv_display_get_vertical_resolution(lv_display_get_default())
|
|
#endif
|
|
|
|
/**
|
|
* Same as Android's DIP. (Different name is chosen to avoid mistype between LV_DPI and LV_DIP)
|
|
* 1 dip is 1 px on a 160 DPI screen
|
|
* 1 dip is 2 px on a 320 DPI screen
|
|
* https://stackoverflow.com/questions/2025282/what-is-the-difference-between-px-dip-dp-and-sp
|
|
*/
|
|
#define _LV_DPX_CALC(dpi, n) ((n) == 0 ? 0 :LV_MAX((( (dpi) * (n) + 80) / 160), 1)) /*+80 for rounding*/
|
|
#define LV_DPX(n) _LV_DPX_CALC(lv_display_get_dpi(NULL), n)
|
|
|
|
/**
|
|
* Scale the given number of pixels (a distance or size) relative to a 160 DPI display
|
|
* considering the DPI of the default display.
|
|
* It ensures that e.g. `lv_dpx(100)` will have the same physical size regardless to the
|
|
* DPI of the display.
|
|
* @param n the number of pixels to scale
|
|
* @return `n x current_dpi/160`
|
|
*/
|
|
static inline int32_t lv_dpx(int32_t n)
|
|
{
|
|
return LV_DPX(n);
|
|
}
|
|
|
|
/**
|
|
* Scale the given number of pixels (a distance or size) relative to a 160 DPI display
|
|
* considering the DPI of the given display.
|
|
* It ensures that e.g. `lv_dpx(100)` will have the same physical size regardless to the
|
|
* DPI of the display.
|
|
* @param disp a display whose dpi should be considered
|
|
* @param n the number of pixels to scale
|
|
* @return `n x current_dpi/160`
|
|
*/
|
|
static inline int32_t lv_display_dpx(const lv_display_t * disp, int32_t n)
|
|
{
|
|
return _LV_DPX_CALC(lv_display_get_dpi(disp), n);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
} /*extern "C"*/
|
|
#endif
|
|
|
|
#endif /*LV_DISPLAY_H*/
|
|
|