mirror of
https://github.com/CTCaer/hekate
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208 lines
4.9 KiB
C
208 lines
4.9 KiB
C
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/**
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* @file lv_vdb.c
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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 "lv_vdb.h"
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#if LV_VDB_SIZE != 0
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#include "../lv_hal/lv_hal_disp.h"
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#include "../lv_misc/lv_log.h"
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#include <stddef.h>
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/*********************
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* DEFINES
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*********************/
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#ifndef LV_ATTRIBUTE_FLUSH_READY
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#define LV_ATTRIBUTE_FLUSH_READY
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#endif
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#ifndef LV_ATTRIBUTE_MEM_ALIGN
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#define LV_ATTRIBUTE_MEM_ALIGN
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#endif
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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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/*Simple VDB*/
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#if LV_VDB_DOUBLE == 0
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# if LV_VDB_ADR == 0
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/*If the buffer address is not specified simply allocate it*/
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static LV_ATTRIBUTE_MEM_ALIGN uint8_t vdb_buf[LV_VDB_SIZE_IN_BYTES];
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static lv_vdb_t vdb = {.buf = (lv_color_t *)vdb_buf};
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# else /*LV_VDB_ADR != 0*/
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/*If the buffer address is specified use that address*/
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static lv_vdb_t vdb = {.buf = (lv_color_t *)LV_VDB_ADR};
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# endif
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/*LV_VDB_DOUBLE != 0*/
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#else
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/*Double VDB*/
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static uint8_t vdb_active = 0;
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# if LV_VDB_ADR == 0
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/*If the buffer address is not specified simply allocate it*/
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static LV_ATTRIBUTE_MEM_ALIGN uint8_t vdb_buf1[LV_VDB_SIZE_IN_BYTES];
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static LV_ATTRIBUTE_MEM_ALIGN uint8_t vdb_buf2[LV_VDB_SIZE_IN_BYTES];
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static lv_vdb_t vdb[2] = {{.buf = (lv_color_t *) vdb_buf1}, {.buf = (lv_color_t *) vdb_buf2}};
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# else /*LV_VDB_ADR != 0*/
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/*If the buffer address is specified use that address*/
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static lv_vdb_t vdb[2] = {{.buf = (lv_color_t *)LV_VDB_ADR}, {.buf = (lv_color_t *)LV_VDB2_ADR}};
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# endif
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#endif
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static volatile bool vdb_flushing = false;
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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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* Get the 'vdb' variable or allocate one in LV_VDB_DOUBLE mode
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* @return pointer to a 'vdb' variable
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*/
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lv_vdb_t * lv_vdb_get(void)
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{
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#if LV_VDB_DOUBLE == 0
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/* Wait until VDB is flushing.
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* (Until this user calls of 'lv_flush_ready()' in the display drivers's flush function*/
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while(vdb_flushing);
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return &vdb;
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#else
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/*If already there is an active do nothing*/
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return &vdb[vdb_active];
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#endif
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}
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/**
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* Flush the content of the VDB
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*/
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void lv_vdb_flush(void)
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{
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lv_vdb_t * vdb_act = lv_vdb_get();
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if(!vdb_act) {
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LV_LOG_WARN("Invalid VDB pointer");
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return;
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}
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/*Don't start a new flush while the previous is not finished*/
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#if LV_VDB_DOUBLE
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while(vdb_flushing);
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#endif /*LV_VDB_DOUBLE*/
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vdb_flushing = true;
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/*Flush the rendered content to the display*/
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lv_disp_flush(vdb_act->area.x1, vdb_act->area.y1, vdb_act->area.x2, vdb_act->area.y2, vdb_act->buf);
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#if LV_VDB_DOUBLE
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/*Make the other VDB active. The content of the current will be kept until the next flush*/
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vdb_active++;
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vdb_active &= 0x1;
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/*If the screen is transparent initialize it when the new VDB is selected*/
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# if LV_COLOR_SCREEN_TRANSP
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memset(vdb[vdb_active].buf, 0x00, LV_VDB_SIZE_IN_BYTES);
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# endif /*LV_COLOR_SCREEN_TRANSP*/
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#endif /*#if LV_VDB_DOUBLE*/
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}
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/**
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* Set the address of VDB buffer(s) manually. To use this set `LV_VDB_ADR` (and `LV_VDB2_ADR`) to `LV_VDB_ADR_INV` in `lv_conf.h`.
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* It should be called before `lv_init()`. The size of the buffer should be: `LV_VDB_SIZE_IN_BYTES`
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* @param buf1 address of the VDB.
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* @param buf2 address of the second buffer. `NULL` if `LV_VDB_DOUBLE 0`
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*/
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void lv_vdb_set_adr(void * buf1, void * buf2)
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{
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#if LV_VDB_DOUBLE == 0
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(void) buf2; /*unused*/
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vdb.buf = buf1;
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#else
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vdb[0].buf = buf1;
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vdb[1].buf = buf2;
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#endif
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}
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/**
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* Call in the display driver's 'disp_flush' function when the flushing is finished
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*/
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LV_ATTRIBUTE_FLUSH_READY void lv_flush_ready(void)
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{
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vdb_flushing = false;
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/*If the screen is transparent initialize it when the flushing is ready*/
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#if LV_VDB_DOUBLE == 0 && LV_COLOR_SCREEN_TRANSP
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memset(vdb_buf, 0x00, LV_VDB_SIZE_IN_BYTES);
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#endif
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}
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/**
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* Get currently active VDB, where the drawing happens. Used with `LV_VDB_DOUBLE 1`
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* @return pointer to the active VDB. If `LV_VDB_DOUBLE 0` give the single VDB
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*/
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lv_vdb_t * lv_vdb_get_active(void)
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{
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#if LV_VDB_DOUBLE == 0
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return &vdb;
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#else
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return &vdb[vdb_active];
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#endif
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}
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/**
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* Get currently inactive VDB, which is being displayed or being flushed. Used with `LV_VDB_DOUBLE 1`
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* @return pointer to the inactive VDB. If `LV_VDB_DOUBLE 0` give the single VDB
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*/
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lv_vdb_t * lv_vdb_get_inactive(void)
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{
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#if LV_VDB_DOUBLE == 0
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return &vdb;
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#else
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return &vdb[(vdb_active + 1) & 0x1];
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#endif
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}
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/**
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* Whether the flushing is in progress or not
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* @return true: flushing is in progress; false: flushing ready
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*/
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bool lv_vdb_is_flushing(void)
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{
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return vdb_flushing;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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#else
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/**
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* Just for compatibility
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*/
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void lv_flush_ready(void)
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{
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/*Do nothing. It is used only for VDB*/
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}
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#endif
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