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TegraExplorer/bdk/libs/lvgl/lv_draw/lv_draw_rbasic.c

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/**
* @file lv_draw_rbasic.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_draw_rbasic.h"
#if USE_LV_REAL_DRAW != 0
#include "../lv_hal/lv_hal_disp.h"
#include "../lv_misc/lv_font.h"
#include "lv_draw.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
static lv_color_t letter_bg_color;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Put a pixel to the display
* @param x x coordinate of the pixel
* @param y y coordinate of the pixel
* @param mask_p the pixel will be drawn on this area
* @param color color of the pixel
* @param opa opacity (ignored, only for compatibility with lv_vpx)
*/
void lv_rpx(lv_coord_t x, lv_coord_t y, const lv_area_t * mask_p, lv_color_t color, lv_opa_t opa)
{
(void)opa; /*Opa is used only for compatibility with lv_vpx*/
lv_area_t area;
area.x1 = x;
area.y1 = y;
area.x2 = x;
area.y2 = y;
lv_rfill(&area, mask_p, color, LV_OPA_COVER);
}
/**
* Fill an area on the display
* @param cords_p coordinates of the area to fill
* @param mask_p fill only o this mask
* @param color fill color
* @param opa opacity (ignored, only for compatibility with lv_vfill)
*/
void lv_rfill(const lv_area_t * cords_p, const lv_area_t * mask_p,
lv_color_t color, lv_opa_t opa)
{
(void)opa; /*Opa is used only for compatibility with lv_vfill*/
lv_area_t masked_area;
bool union_ok = true;
if(mask_p != NULL) {
union_ok = lv_area_intersect(&masked_area, cords_p, mask_p);
} else {
lv_area_t scr_area;
lv_area_set(&scr_area, 0, 0, LV_HOR_RES - 1, LV_VER_RES - 1);
union_ok = lv_area_intersect(&masked_area, cords_p, &scr_area);
}
if(union_ok != false) {
lv_disp_fill(masked_area.x1, masked_area.y1, masked_area.x2, masked_area.y2, color);
}
}
/**
* Draw a letter to the display
* @param pos_p left-top coordinate of the latter
* @param mask_p the letter will be drawn only on this area
* @param font_p pointer to font
* @param letter a letter to draw
* @param color color of letter
* @param opa opacity of letter (ignored, only for compatibility with lv_vletter)
*/
void lv_rletter(const lv_point_t * pos_p, const lv_area_t * mask_p,
const lv_font_t * font_p, uint32_t letter,
lv_color_t color, lv_opa_t opa)
{
(void)opa; /*Opa is used only for compatibility with lv_vletter*/
static uint8_t bpp1_opa_table[2] = {0, 255}; /*Opacity mapping with bpp = 1 (Just for compatibility)*/
static uint8_t bpp2_opa_table[4] = {0, 85, 170, 255}; /*Opacity mapping with bpp = 2*/
static uint8_t bpp4_opa_table[16] = {0, 17, 34, 51, /*Opacity mapping with bpp = 4*/
68, 85, 102, 119,
136, 153, 170, 187,
204, 221, 238, 255
};
if(font_p == NULL) return;
uint8_t letter_w = lv_font_get_width(font_p, letter);
uint8_t letter_h = lv_font_get_height(font_p);
uint8_t bpp = lv_font_get_bpp(font_p, letter); /*Bit per pixel (1,2, 4 or 8)*/
uint8_t * bpp_opa_table;
uint8_t mask_init;
uint8_t mask;
switch(bpp) {
case 1:
bpp_opa_table = bpp1_opa_table;
mask_init = 0x80;
break;
case 2:
bpp_opa_table = bpp2_opa_table;
mask_init = 0xC0;
break;
case 4:
bpp_opa_table = bpp4_opa_table;
mask_init = 0xF0;
break;
case 8:
bpp_opa_table = NULL;
mask_init = 0xFF;
break; /*No opa table, pixel value will be used directly*/
default:
return; /*Invalid bpp. Can't render the letter*/
}
const uint8_t * map_p = lv_font_get_bitmap(font_p, letter);
if(map_p == NULL) return;
/*If the letter is completely out of mask don't draw it */
if(pos_p->x + letter_w < mask_p->x1 || pos_p->x > mask_p->x2 ||
pos_p->y + letter_h < mask_p->y1 || pos_p->y > mask_p->y2) return;
lv_coord_t col, row;
uint8_t col_bit;
uint8_t col_byte_cnt;
uint8_t width_byte_scr = letter_w >> 3; /*Width in bytes (on the screen finally) (e.g. w = 11 -> 2 bytes wide)*/
if(letter_w & 0x7) width_byte_scr++;
uint8_t width_byte_bpp = (letter_w * bpp) >> 3; /*Letter width in byte. Real width in the font*/
if((letter_w * bpp) & 0x7) width_byte_bpp++;
/* Calculate the col/row start/end on the map*/
lv_coord_t col_start = pos_p->x >= mask_p->x1 ? 0 : mask_p->x1 - pos_p->x;
lv_coord_t col_end = pos_p->x + letter_w <= mask_p->x2 ? letter_w : mask_p->x2 - pos_p->x + 1;
lv_coord_t row_start = pos_p->y >= mask_p->y1 ? 0 : mask_p->y1 - pos_p->y;
lv_coord_t row_end = pos_p->y + letter_h <= mask_p->y2 ? letter_h : mask_p->y2 - pos_p->y + 1;
/*Move on the map too*/
map_p += (row_start * width_byte_bpp) + ((col_start * bpp) >> 3);
uint8_t letter_px;
for(row = row_start; row < row_end; row ++) {
col_byte_cnt = 0;
col_bit = (col_start * bpp) % 8;
mask = mask_init >> col_bit;
for(col = col_start; col < col_end; col ++) {
letter_px = (*map_p & mask) >> (8 - col_bit - bpp);
if(letter_px != 0) {
lv_rpx(pos_p->x + col, pos_p->y + row, mask_p, lv_color_mix(color, letter_bg_color, bpp == 8 ? letter_px : bpp_opa_table[letter_px]), LV_OPA_COVER);
}
if(col_bit < 8 - bpp) {
col_bit += bpp;
mask = mask >> bpp;
} else {
col_bit = 0;
col_byte_cnt ++;
mask = mask_init;
map_p ++;
}
}
map_p += (width_byte_bpp) - col_byte_cnt;
}
}
/**
* When the letter is ant-aliased it needs to know the background color
* @param bg_color the background color of the currently drawn letter
*/
void lv_rletter_set_background(lv_color_t color)
{
letter_bg_color = color;
}
/**
* Draw a color map to the display (image)
* @param cords_p coordinates the color map
* @param mask_p the map will drawn only on this area
* @param map_p pointer to a lv_color_t array
* @param opa opacity of the map (ignored, only for compatibility with 'lv_vmap')
* @param chroma_keyed true: enable transparency of LV_IMG_LV_COLOR_TRANSP color pixels
* @param alpha_byte true: extra alpha byte is inserted for every pixel (not supported, only l'v_vmap' can draw it)
* @param recolor mix the pixels with this color
* @param recolor_opa the intense of recoloring
*/
void lv_rmap(const lv_area_t * cords_p, const lv_area_t * mask_p,
const uint8_t * map_p, lv_opa_t opa, bool chroma_key, bool alpha_byte,
lv_color_t recolor, lv_opa_t recolor_opa)
{
if(alpha_byte) return; /*Pixel level opacity i not supported in real map drawing*/
(void)opa; /*opa is used only for compatibility with lv_vmap*/
lv_area_t masked_a;
bool union_ok;
union_ok = lv_area_intersect(&masked_a, cords_p, mask_p);
/*If there are common part of the mask and map then draw the map*/
if(union_ok == false) return;
/*Go to the first pixel*/
lv_coord_t map_width = lv_area_get_width(cords_p);
map_p += (masked_a.y1 - cords_p->y1) * map_width * sizeof(lv_color_t);
map_p += (masked_a.x1 - cords_p->x1) * sizeof(lv_color_t);
lv_coord_t row;
if(recolor_opa == LV_OPA_TRANSP && chroma_key == false) {
lv_coord_t mask_w = lv_area_get_width(&masked_a) - 1;
for(row = masked_a.y1; row <= masked_a.y2; row++) {
lv_disp_map(masked_a.x1, row, masked_a.x1 + mask_w, row, (lv_color_t *)map_p);
map_p += map_width * sizeof(lv_color_t); /*Next row on the map*/
}
} else {
lv_color_t chroma_key_color = LV_COLOR_TRANSP;
lv_coord_t col;
for(row = masked_a.y1; row <= masked_a.y2; row++) {
for(col = masked_a.x1; col <= masked_a.x2; col++) {
lv_color_t * px_color = (lv_color_t *) &map_p[(uint32_t)(col - masked_a.x1) * sizeof(lv_color_t)];
if(chroma_key && chroma_key_color.full == px_color->full) continue;
if(recolor_opa != LV_OPA_TRANSP) {
lv_color_t recolored_px = lv_color_mix(recolor, *px_color, recolor_opa);
lv_rpx(col, row, mask_p, recolored_px, LV_OPA_COVER);
} else {
lv_rpx(col, row, mask_p, *px_color, LV_OPA_COVER);
}
}
map_p += map_width * sizeof(lv_color_t); /*Next row on the map*/
}
}
}
/**********************
* STATIC FUNCTIONS
**********************/
#endif /*USE_LV_REAL_DRAW*/
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