mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-21 06:53:01 +08:00
154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
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/**
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* @file hal_disp.c
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*
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* @description HAL layer for display driver
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include <stdint.h>
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#include <stddef.h>
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#include "lv_hal.h"
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#include "../lv_misc/lv_mem.h"
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#include "../lv_core/lv_obj.h"
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#include "../lv_misc/lv_gc.h"
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#if defined(LV_GC_INCLUDE)
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# include LV_GC_INCLUDE
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#endif /* LV_ENABLE_GC */
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Initialize a display driver with default values.
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* It is used to surly have known values in the fields ant not memory junk.
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* After it you can set the fields.
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* @param driver pointer to driver variable to initialize
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*/
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void lv_disp_drv_init(lv_disp_drv_t * driver)
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{
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driver->disp_flush = NULL;
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driver->hor_res = LV_HOR_RES_MAX;
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driver->ver_res = LV_VER_RES_MAX;
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#if USE_LV_GPU
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driver->mem_blend = NULL;
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driver->mem_fill = NULL;
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#endif
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driver->vdb_wr = NULL;
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}
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/**
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* Register an initialized display driver.
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* Automatically set the first display as active.
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* @param driver pointer to an initialized 'lv_disp_drv_t' variable (can be local variable)
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* @return pointer to the new display or NULL on error
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*/
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lv_disp_t * lv_disp_drv_register(lv_disp_drv_t * driver)
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{
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lv_disp_t * disp = lv_ll_ins_head(&LV_GC_ROOT(_lv_disp_ll));
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if(!disp) {
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lv_mem_assert(disp);
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return NULL;
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}
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memcpy(&disp->driver, driver, sizeof(lv_disp_drv_t));
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lv_ll_init(&disp->scr_ll, sizeof(lv_obj_t));
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disp->act_scr = lv_obj_create(NULL, NULL); /*Create a default screen on the display*/
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disp->top_layer = lv_obj_create(NULL, NULL); /*Create top layer on the display*/
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disp->sys_layer = lv_obj_create(NULL, NULL); /*Create top layer on the display*/
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lv_obj_set_style(disp->top_layer, &lv_style_transp);
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lv_obj_set_style(disp->sys_layer, &lv_style_transp);
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disp->inv_p = 0;
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disp->vdb_act = 0;
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disp->vdb_flushing = 0;
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return disp;
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}
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/**
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* Get the next display.
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* @param disp pointer to the current display. NULL to initialize.
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* @return the next display or NULL if no more. Give the first display when the parameter is NULL
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*/
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lv_disp_t * lv_disp_get_next(lv_disp_t * disp)
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{
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if(disp == NULL) return lv_ll_get_head(&LV_GC_ROOT(_lv_disp_ll));
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else return lv_ll_get_next(&LV_GC_ROOT(_lv_disp_ll), disp);
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}
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lv_disp_t * lv_disp_get_last(void)
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{
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return lv_ll_get_head(&LV_GC_ROOT(_lv_disp_ll));
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}
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lv_vdb_t * lv_disp_get_vdb(lv_disp_t * disp)
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{
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return disp->driver.buffer;
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}
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lv_coord_t lv_disp_get_hor_res(lv_disp_t * disp)
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{
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if(disp == NULL) disp = lv_disp_get_last();
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if(disp == NULL) return LV_HOR_RES_MAX;
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else return disp->driver.hor_res;
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}
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lv_coord_t lv_disp_get_ver_res(lv_disp_t * disp)
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{
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if(disp == NULL) disp = lv_disp_get_last();
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if(disp == NULL) return LV_VER_RES_MAX;
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else return disp->driver.ver_res;
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}
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bool lv_disp_is_double_vdb(lv_disp_t * disp)
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{
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if(disp->driver.buffer->buf1 && disp->driver.buffer->buf2) return true;
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else return false;
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}
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bool lv_disp_is_true_double_buffered(lv_disp_t * disp)
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{
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if(lv_disp_is_double_vdb(disp) && disp->driver.buffer->size == disp->driver.hor_res * disp->driver.ver_res) return true;
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else return false;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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