# lv_display_private.h (/api/display/lv_display_private_h)
Structs [#structs]
\_lv_display_t [#_lv_display_t]
| Member | Type | Description |
| ----------------------- | ---------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `ext_data` | | |
| `hor_res` | | Horizontal resolution. |
| `ver_res` | | Vertical resolution. |
| `physical_hor_res` | | Horizontal resolution of the full / physical display. Set to -1 for fullscreen mode. |
| `physical_ver_res` | | Vertical resolution of the full / physical display. Set to -1 for fullscreen mode. |
| `offset_x` | | Horizontal offset from the full / physical display. Set to 0 for fullscreen mode. |
| `offset_y` | | Vertical offset from the full / physical display. Set to 0 for fullscreen mode. |
| `dpi` | | DPI (dot per inch) of the display. Default value is `LV_DPI_DEF`. |
| `buf_1` | | |
| `buf_2` | | |
| `buf_3` | | |
| `buf_act` | | Internal, used by the library |
| `flush_cb` | | MANDATORY: Write the internal buffer (draw\_buf) to the display. '' has to be called when finished |
| `flush_wait_cb` | | Used to wait while flushing is ready. It can do any complex logic to wait, including semaphores, mutexes, polling flags, etc. If not set `flushing` flag is used which can be cleared with |
| `flushing` | `volatile int` | 1: flushing is in progress. (It can't be a bit field because when it's cleared from IRQ Read-Modify-Write issue might occur) |
| `flushing_last` | `volatile int` | 1: It was the last chunk to flush. (It can't be a bit field because when it's cleared from IRQ Read-Modify-Write issue might occur) |
| `last_area` | | 1: last area is being rendered |
| `last_part` | | 1: last part of the current area is being rendered |
| `sync_cb` | | Used to synchronize changes between frame buffers between renders. Called for each area needing to be synchronized before rendering next frame. |
| `sync_wait_cb` | | Used to wait while syncing is ready. It can do any complex logic to wait, including semaphores, mutexes, polling flags, etc. If not set `syncing` flag is used which can be cleared with |
| `syncing` | `volatile int` | 1: syncing is in progress. (It can't be a bit field because when it's cleared from IRQ Read-Modify-Write issue might occur) |
| `syncing_last` | `volatile int` | 1: It was the last chunk to sync. (It can't be a bit field because when it's cleared from IRQ Read-Modify-Write issue might occur) |
| `sync_areas` | | Sync areas (redrawn during last refresh) |
| `render_mode` | | |
| `antialiasing` | | 1: anti-aliasing is enabled on this display. |
| `tile_cnt` | | Divide the display buffer into these number of tiles |
| `stride_is_auto` | | 1: The stride of the buffers was not set explicitly. |
| `rendering_in_progress` | | 1: The current screen rendering is in progress |
| `color_format` | | |
| `inv_areas` | `lv_area_t[32]` | Invalidated (marked to redraw) areas |
| `inv_area_joined` | `uint8_t[32]` | |
| `inv_p` | | |
| `inv_en_cnt` | | |
| `_static_buf1` | | Used when user pass in a raw buffer as display draw buffer |
| `_static_buf2` | | |
| `layer_head` | | |
| `layer_init` | `void(*)(lv_display_t *disp, lv_layer_t *layer)` | |
| `layer_deinit` | `void(*)(lv_display_t *disp, lv_layer_t *layer)` | |
| `screens` | | Screens of the display Array of screen objects. |
| `sys_layer` | | |
| `top_layer` | | |
| `act_scr` | | Currently active screen on this display |
| `bottom_layer` | | |
| `prev_scr` | | Previous screen. Used during screen animations |
| `scr_to_load` | | The screen prepared to load in lv\_screen\_load\_anim |
| `screen_cnt` | | |
| `draw_prev_over_act` | | |
| `del_prev` | | 1: Draw previous screen over active screen |
| `driver_data` | `void *` | 1: Automatically delete the previous screen when the screen load animation is ready Custom user data |
| `user_data` | `void *` | Custom user data |
| `event_list` | | |
| `rotation` | | Element of lv\_display\_rotation\_t |
| `matrix_rotation` | | 1: Use matrix for display rotation |
| `theme` | | The theme assigned to the screen |
| `refr_timer` | | A timer which periodically checks the dirty areas and refreshes them |
| `last_activity_time` | | Last time when there was activity on this display |
| `refreshed_area` | | The area being refreshed |
| `vsync_count` | | |
| `perf_label` | | |
| `perf_sysmon_backend` | | |
| `perf_sysmon_info` | | |
| `mem_label` | | |
* `lv_indev_set_display` — param `disp`
Macros [#macros]
LV_INV_BUF_SIZE [#lv_inv_buf_size]
```c title=" " lineNumbers=1
#define LV_INV_BUF_SIZE 32
```
Buffer size for invalid areas
Dependencies [#dependencies]