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https://github.com/lvgl/lvgl.git
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100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
/**
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* @file lv_vdb.c
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*
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*/
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#include "lv_conf.h"
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#if LV_VDB_SIZE != 0
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#include "hal/disp/disp.h"
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#include <stddef.h>
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#include "lv_vdb.h"
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/*********************
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* INCLUDES
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*********************/
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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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static lv_vdb_t vdb;
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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
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* @return pointer to the 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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return &vdb;
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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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#if LV_ANTIALIAS == 0
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disp_area(DISP_ID_ALL, vdb.vdb_area.x1 , vdb.vdb_area.y1, vdb.vdb_area.x2, vdb.vdb_area.y2);
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disp_map(DISP_ID_ALL, vdb.buf);
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#else
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color_t row_buf[LV_HOR_RES / LV_DOWNSCALE];
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color_t * row_buf_p;
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cord_t x;
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cord_t y;
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cord_t w = area_get_width(&vdb.vdb_area);
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cord_t i;
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color_t * buf_p = vdb.buf;
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for(y = vdb.vdb_area.y1 >> 1; y <= vdb.vdb_area.y2 >> 1; y ++) {
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i = 0;
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row_buf_p = row_buf;
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for(x = vdb.vdb_area.x1; x < vdb.vdb_area.x2; x += 2, i += 2) {
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row_buf_p->red = (buf_p[i].red +
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buf_p[i + 1].red +
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buf_p[i + w].red +
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buf_p[i + w + 1].red) >> 2;
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row_buf_p->green = (buf_p[i].green +
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buf_p[i + 1].green +
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buf_p[i + w].green +
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buf_p[i + w + 1].green) >> 2;
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row_buf_p->blue = (buf_p[i].blue +
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buf_p[i + 1].blue +
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buf_p[i + w].blue +
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buf_p[i + w + 1].blue) >> 2;
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row_buf_p++;
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}
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buf_p += LV_DOWNSCALE * w;
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disp_area(DISP_ID_ALL, vdb.vdb_area.x1 >> 1, y, vdb.vdb_area.x2 >> 1, y);
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disp_map(DISP_ID_ALL, row_buf);
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}
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#endif
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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#endif
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