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lvgl/lv_draw/lv_draw.c

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/**
* @file lv_draw.c
*
*/
/*********************
* INCLUDES
*********************/
#include "../../lv_conf.h"
#include <stdio.h>
#include <stdbool.h>
#include "lv_draw.h"
#include "lv_draw_rbasic.h"
#include "lv_draw_vbasic.h"
#include "../lv_misc/lv_circ.h"
#include "../lv_misc/lv_fs.h"
#include "../lv_misc/lv_math.h"
#include "../lv_misc/lv_ufs.h"
#include "../lv_objx/lv_img.h"
/*********************
* DEFINES
*********************/
#define CIRCLE_AA_NON_LINEAR_OPA_THRESHOLD 5 /*Circle segment greater then this value will be anti-aliased by a non-linear (cos) opacity mapping*/
#define LINE_WIDTH_CORR_BASE 64
#define LINE_WIDTH_CORR_SHIFT 6
#define LABEL_RECOLOR_PAR_LENGTH 6
#define SHADOW_OPA_EXTRA_PRECISION 8 /*Calculate with 2^x bigger shadow opacity values to avoid rounding errors*/
#define SHADOW_BOTTOM_AA_EXTRA_RADIUS 3 /*Add extra radius with LV_SHADOW_BOTTOM to cover anti-aliased corners*/
/**********************
* TYPEDEFS
**********************/
typedef enum
{
CMD_STATE_WAIT,
CMD_STATE_PAR,
CMD_STATE_IN,
}cmd_state_t;
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_draw_rect_main_mid(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_rect_main_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_rect_border_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_rect_border_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
#if USE_LV_SHADOW && LV_VDB_SIZE
static void lv_draw_shadow(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_shadow_full(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_shadow_bottom(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style);
static void lv_draw_shadow_full_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, const lv_opa_t * map);
#endif
static uint16_t lv_draw_cont_radius_corr(uint16_t r, lv_coord_t w, lv_coord_t h);
#if LV_ANTIALIAS != 0
static lv_opa_t antialias_get_opa(lv_coord_t seg, lv_coord_t px_id, lv_opa_t line_opa);
static lv_opa_t antialias_get_opa_circ(lv_coord_t seg, lv_coord_t px_id, lv_opa_t opa);
#endif
static uint8_t hex_char_to_num(char hex);
#if USE_LV_TRIANGLE != 0
static void point_swap(lv_point_t * p1, lv_point_t * p2);
#endif
/**********************
* STATIC VARIABLES
**********************/
#if LV_VDB_SIZE != 0
static void (*px_fp)(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_vpx;
static void (*fill_fp)(const lv_area_t * coords, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_vfill;
static void (*letter_fp)(const lv_point_t * pos_p, const lv_area_t * mask, const lv_font_t * font_p, uint32_t letter, lv_color_t color, lv_opa_t opa) = lv_vletter;
# if USE_LV_IMG
static void (*map_fp)(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) = lv_vmap;
# endif /*USE_LV_IMG*/
#elif USE_LV_REAL_DRAW != 0
/* px_fp used only by shadow drawing and anti aliasing
* static void (*px_fp)(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_rpx;
*/
static void (*fill_fp)(const lv_area_t * coords, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = lv_rfill;
static void (*letter_fp)(const lv_point_t * pos_p, const lv_area_t * mask, const lv_font_t * font_p, uint32_t letter, lv_color_t color, lv_opa_t opa) = lv_rletter;
# if USE_LV_IMG
static void (*map_fp)(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) = lv_rmap;
# endif /*USE_LV_IMG*/
#else
/*Invalid settings. Compiler error will be thrown*/
static void (*px_fp)(lv_coord_t x, lv_coord_t y, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = NULL;
static void (*fill_fp)(const lv_area_t * coords, const lv_area_t * mask, lv_color_t color, lv_opa_t opa) = NULL;
static void (*letter_fp)(const lv_point_t * pos_p, const lv_area_t * mask, const lv_font_t * font_p, uint32_t letter, lv_color_t color, lv_opa_t opa) = NULL;
static void (*map_fp)(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) = NULL;
#endif
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Draw a rectangle
* @param coords the coordinates of the rectangle
* @param mask the rectangle will be drawn only in this mask
* @param style pointer to a style
*/
void lv_draw_rect(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
if(lv_area_get_height(coords) < 1 || lv_area_get_width(coords) < 1) return;
#if USE_LV_SHADOW && LV_VDB_SIZE
if(style->body.shadow.width != 0) {
lv_draw_shadow(coords, mask, style);
}
#endif
if(style->body.empty == 0){
lv_draw_rect_main_mid(coords, mask, style);
if(style->body.radius != 0) {
lv_draw_rect_main_corner(coords, mask, style);
}
}
if(style->body.border.width != 0 && style->body.border.part != LV_BORDER_NONE) {
lv_draw_rect_border_straight(coords, mask, style);
if(style->body.radius != 0) {
lv_draw_rect_border_corner(coords, mask, style);
}
}
}
#if USE_LV_TRIANGLE != 0
/**
*
* @param points pointer to an array with 3 points
* @param mask the triangle will be drawn only in this mask
* @param color color of the triangle
*/
void lv_draw_triangle(const lv_point_t * points, const lv_area_t * mask, lv_color_t color)
{
lv_point_t tri[3];
memcpy(tri, points, sizeof(tri));
/*Sort the vertices according to their y coordinate (0: y max, 1: y mid, 2:y min)*/
if(tri[1].y < tri[0].y) point_swap(&tri[1], &tri[0]);
if(tri[2].y < tri[1].y) point_swap(&tri[2], &tri[1]);
if(tri[1].y < tri[0].y) point_swap(&tri[1], &tri[0]);
/*Return is the triangle is degenerated*/
if(tri[0].x == tri[1].x && tri[0].y == tri[1].y) return;
if(tri[1].x == tri[2].x && tri[1].y == tri[2].y) return;
if(tri[0].x == tri[2].x && tri[0].y == tri[2].y) return;
if(tri[0].x == tri[1].x && tri[1].x == tri[2].x) return;
if(tri[0].y == tri[1].y && tri[1].y == tri[2].y) return;
/*Draw the triangle*/
lv_point_t edge1;
lv_coord_t dx1 = LV_MATH_ABS(tri[0].x - tri[1].x);
lv_coord_t sx1 = tri[0].x < tri[1].x ? 1 : -1;
lv_coord_t dy1 = LV_MATH_ABS(tri[0].y - tri[1].y);
lv_coord_t sy1 = tri[0].y < tri[1].y ? 1 : -1;
lv_coord_t err1 = (dx1 > dy1 ? dx1 : -dy1) / 2;
lv_coord_t err_tmp1;
lv_point_t edge2;
lv_coord_t dx2 = LV_MATH_ABS(tri[0].x - tri[2].x);
lv_coord_t sx2 = tri[0].x < tri[2].x ? 1 : -1;
lv_coord_t dy2 = LV_MATH_ABS(tri[0].y - tri[2].y);
lv_coord_t sy2 = tri[0].y < tri[2].y ? 1 : -1;
lv_coord_t err2 = (dx1 > dy2 ? dx2 : -dy2) / 2;
lv_coord_t err_tmp2;
lv_coord_t y1_tmp;
lv_coord_t y2_tmp;
edge1.x = tri[0].x;
edge1.y = tri[0].y;
edge2.x = tri[0].x;
edge2.y = tri[0].y;
lv_area_t act_area;
lv_area_t draw_area;
while(1) {
act_area.x1 = edge1.x;
act_area.x2 = edge2.x ;
act_area.y1 = edge1.y;
act_area.y2 = edge2.y ;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
draw_area.x2--; /*Do not draw most right pixel because it will be drawn by the adjacent triangle*/
fill_fp(&draw_area, mask, color, LV_OPA_50);
/*Calc. the next point of edge1*/
y1_tmp = edge1.y;
do {
if (edge1.x == tri[1].x && edge1.y == tri[1].y) {
dx1 = LV_MATH_ABS(tri[1].x - tri[2].x);
sx1 = tri[1].x < tri[2].x ? 1 : -1;
dy1 = LV_MATH_ABS(tri[1].y - tri[2].y);
sy1 = tri[1].y < tri[2].y ? 1 : -1;
err1 = (dx1 > dy1 ? dx1 : -dy1) / 2;
}
else if (edge1.x == tri[2].x && edge1.y == tri[2].y) return;
err_tmp1 = err1;
if (err_tmp1 >-dx1) {
err1 -= dy1;
edge1.x += sx1;
}
if (err_tmp1 < dy1) {
err1 += dx1;
edge1.y += sy1;
}
} while(edge1.y == y1_tmp);
/*Calc. the next point of edge2*/
y2_tmp = edge2.y;
do {
if (edge2.x == tri[2].x && edge2.y == tri[2].y) return;
err_tmp2 = err2;
if (err_tmp2 > -dx2) {
err2 -= dy2;
edge2.x += sx2;
}
if (err_tmp2 < dy2) {
err2 += dx2;
edge2.y += sy2;
}
} while(edge2.y == y2_tmp);
}
}
#endif
/**
* Write a text
* @param coords coordinates of the label
* @param mask the label will be drawn only in this area
* @param style pointer to a style
* @param txt 0 terminated text to write
* @param flag settings for the text from 'txt_flag_t' enum
* @param offset text offset in x and y direction (NULL if unused)
*
*/
void lv_draw_label(const lv_area_t * coords,const lv_area_t * mask, const lv_style_t * style,
const char * txt, lv_txt_flag_t flag, lv_point_t * offset)
{
const lv_font_t * font = style->text.font;
lv_coord_t w;
if((flag & LV_TXT_FLAG_EXPAND) == 0) {
w = lv_area_get_width(coords);
} else {
lv_point_t p;
lv_txt_get_size(&p, txt, style->text.font, style->text.letter_space, style->text.line_space, LV_COORD_MAX, flag);
w = p.x;
}
/*Init variables for the first line*/
lv_coord_t line_length = 0;
uint32_t line_start = 0;
uint32_t line_end = lv_txt_get_next_line(txt, font, style->text.letter_space, w, flag);
lv_point_t pos;
pos.x = coords->x1;
pos.y = coords->y1;
/*Align the line to middle if enabled*/
if(flag & LV_TXT_FLAG_CENTER) {
line_length = lv_txt_get_width(&txt[line_start], line_end - line_start,
font, style->text.letter_space, flag);
pos.x += (w - line_length) / 2;
}
cmd_state_t cmd_state = CMD_STATE_WAIT;
uint32_t i;
uint16_t par_start = 0;
lv_color_t recolor;
lv_coord_t letter_w;
lv_coord_t x_ofs = 0;
lv_coord_t y_ofs = 0;
if(offset != NULL) {
x_ofs = offset->x;
y_ofs = offset->y;
pos.y += y_ofs;
}
/*Real draw need a background color for higher bpp letter*/
#if LV_VDB_SIZE == 0
lv_rletter_set_background(style->body.main_color);
#endif
/*Write out all lines*/
while(txt[line_start] != '\0') {
if(offset != NULL) {
pos.x += x_ofs;
}
/*Write all letter of a line*/
cmd_state = CMD_STATE_WAIT;
i = line_start;
uint32_t letter;
while(i < line_end) {
letter = lv_txt_utf8_next(txt, &i);
/*Handle the re-color command*/
if((flag & LV_TXT_FLAG_RECOLOR) != 0) {
if(letter == (uint32_t)LV_TXT_COLOR_CMD[0]) {
if(cmd_state == CMD_STATE_WAIT) { /*Start char*/
par_start = i;// + lv_txt_utf8_size(txt[i]);
cmd_state = CMD_STATE_PAR;
continue;
} else if(cmd_state == CMD_STATE_PAR) { /*Other start char in parameter escaped cmd. char */
cmd_state = CMD_STATE_WAIT;
}else if(cmd_state == CMD_STATE_IN) { /*Command end */
cmd_state = CMD_STATE_WAIT;
continue;
}
}
/*Skip the color parameter and wait the space after it*/
if(cmd_state == CMD_STATE_PAR) {
if(letter == ' ') {
/*Get the parameter*/
if(i - par_start == LABEL_RECOLOR_PAR_LENGTH + 1) {
char buf[LABEL_RECOLOR_PAR_LENGTH + 1];
memcpy(buf, &txt[par_start], LABEL_RECOLOR_PAR_LENGTH);
buf[LABEL_RECOLOR_PAR_LENGTH] = '\0';
int r,g,b;
r = (hex_char_to_num(buf[0]) << 4) + hex_char_to_num(buf[1]);
g = (hex_char_to_num(buf[2]) << 4) + hex_char_to_num(buf[3]);
b = (hex_char_to_num(buf[4]) << 4) + hex_char_to_num(buf[5]);
// sscanf(buf, "%02x%02x%02x", &r, &g, &b);
recolor = LV_COLOR_MAKE(r, g, b);
} else {
recolor.full = style->text.color.full;
}
cmd_state = CMD_STATE_IN; /*After the parameter the text is in the command*/
}
continue;
}
}
lv_color_t color = style->text.color;
if(cmd_state == CMD_STATE_IN) color = recolor;
letter_fp(&pos, mask, font, letter, color, style->text.opa);
letter_w = lv_font_get_width(font, letter);
pos.x += letter_w + style->text.letter_space;
}
/*Go to next line*/
line_start = line_end;
line_end += lv_txt_get_next_line(&txt[line_start], font, style->text.letter_space, w, flag);
pos.x = coords->x1;
/*Align to middle*/
if(flag & LV_TXT_FLAG_CENTER) {
line_length = lv_txt_get_width(&txt[line_start], line_end - line_start,
font, style->text.letter_space, flag);
pos.x += (w - line_length) / 2;
}
/*Go the next line position*/
pos.y += lv_font_get_height(font);
pos.y += style->text.line_space;
}
}
#if USE_LV_IMG
/**
* Draw an image
* @param coords the coordinates of the image
* @param mask the image will be drawn only in this area
* @param map_p pointer to a lv_color_t array which contains the pixels of the image
* @param opa opacity of the image (0..255)
*/
void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
const lv_style_t * style, const void * src)
{
if(src == NULL) {
lv_draw_rect(coords, mask, &lv_style_plain);
lv_draw_label(coords, mask, &lv_style_plain, "No\ndata", LV_TXT_FLAG_NONE, NULL);
return;
}
const uint8_t * u8_p = (uint8_t*) src;
if(u8_p[0] >= 'A' && u8_p[0] <= 'Z') { /*It will be a path of a file*/
lv_fs_file_t file;
lv_fs_res_t res = lv_fs_open(&file, src, LV_FS_MODE_RD);
if(res == LV_FS_RES_OK) {
lv_img_t img_data;
uint32_t br;
res = lv_fs_read(&file, &img_data, sizeof(lv_img_t), &br);
lv_area_t mask_com; /*Common area of mask and cords*/
bool union_ok;
union_ok = lv_area_union(&mask_com, mask, coords);
if(union_ok == false) {
lv_fs_close(&file);
return;
}
uint8_t px_size = 0;
switch(img_data.header.format) {
case LV_IMG_FORMAT_FILE_RAW_RGB332: px_size = 1; break;
case LV_IMG_FORMAT_FILE_RAW_RGB565: px_size = 2; break;
case LV_IMG_FORMAT_FILE_RAW_RGB888: px_size = 4; break;
default: return;
}
if(img_data.header.alpha_byte) { /*Correction with the alpha byte*/
px_size++;
if(img_data.header.format == LV_IMG_FORMAT_FILE_RAW_RGB888) px_size--; /*Stored in the 4 byte anyway*/
}
/* Move the file pointer to the start address according to mask*/
uint32_t start_offset = sizeof(img_data.header);
start_offset += (lv_area_get_width(coords)) * (mask_com.y1 - coords->y1) * px_size; /*First row*/
start_offset += (mask_com.x1 - coords->x1) * px_size; /*First col*/
lv_fs_seek(&file, start_offset);
uint32_t useful_data = lv_area_get_width(&mask_com) * px_size;
uint32_t next_row = lv_area_get_width(coords) * px_size - useful_data;
lv_area_t line;
lv_area_copy(&line, &mask_com);
lv_area_set_height(&line, 1);
lv_coord_t row;
uint32_t act_pos;
lv_color_t buf[lv_area_get_width(&mask_com)];
for(row = mask_com.y1; row <= mask_com.y2; row ++) {
res = lv_fs_read(&file, buf, useful_data, &br);
map_fp(&line, &mask_com, (uint8_t *)buf, style->image.opa, img_data.header.chroma_keyed, img_data.header.alpha_byte,
style->image.color, style->image.intense);
lv_fs_tell(&file, &act_pos);
lv_fs_seek(&file, act_pos + next_row);
line.y1++; /*Go down a line*/
line.y2++;
}
lv_fs_close(&file);
if(res != LV_FS_RES_OK) {
lv_draw_rect(coords, mask, &lv_style_plain);
lv_draw_label(coords, mask, &lv_style_plain, "No data", LV_TXT_FLAG_NONE, NULL);
}
}
}
else {
const lv_img_t * img_var = src;
lv_area_t mask_com; /*Common area of mask and coords*/
bool union_ok;
union_ok = lv_area_union(&mask_com, mask, coords);
if(union_ok == false) {
return; /*Out of mask*/
}
map_fp(coords, mask, img_var->pixel_map, style->image.opa, img_var->header.chroma_keyed, img_var->header.alpha_byte, style->image.color, style->image.intense);
}
}
#endif
/**
* Draw a line
* @param p1 first point of the line
* @param p2 second point of the line
* @param maskthe line will be drawn only on this area
* @param lines_p pointer to a line style
*/
void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * mask,
const lv_style_t * style)
{
if(style->line.width == 0) return;
if(point1->x == point2->x && point1->y == point2->y) return;
lv_point_t p1;
lv_point_t p2;
/*Be sure always x1 < x2*/
if(point1->x < point2->x) {
p1.x = point1->x;
p1.y = point1->y;
p2.x = point2->x;
p2.y = point2->y;
} else {
p1.x = point2->x;
p1.y = point2->y;
p2.x = point1->x;
p2.y = point1->y;
}
lv_coord_t dx = LV_MATH_ABS(p2.x - p1.x);
lv_coord_t sx = p1.x < p2.x ? 1 : -1;
lv_coord_t dy = LV_MATH_ABS(p2.y - p1.y);
lv_coord_t sy = p1.y < p2.y ? 1 : -1;
lv_coord_t err = (dx > dy ? dx : -dy) / 2;
lv_coord_t e2;
bool hor = dx > dy ? true : false; /*Rather horizontal or vertical*/
lv_coord_t last_x = p1.x;
lv_coord_t last_y = p1.y;
lv_point_t act_point;
act_point.x = p1.x;
act_point.y = p1.y;
lv_coord_t width;
uint16_t wcor;
uint16_t width_half = 0;
uint16_t width_1 = 0;
static const uint8_t width_corr_array[] = {
64, 64, 64, 64, 64, 64, 64, 64, 64, 65, 65, 65, 65, 65, 66, 66, 66, 66, 66,
67, 67, 67, 68, 68, 68, 69, 69, 69, 70, 70, 71, 71, 72, 72, 72, 73, 73, 74,
74, 75, 75, 76, 77, 77, 78, 78, 79, 79, 80, 81, 81, 82, 82, 83, 84, 84, 85,
86, 86, 87, 88, 88, 89, 90, 91,
};
if(hor == false) {
wcor = (dx * LINE_WIDTH_CORR_BASE) / dy;
} else {
wcor = (dy * LINE_WIDTH_CORR_BASE) / dx;
}
width = style->line.width - 1;
#if LV_ANTIALIAS != 0
bool aa_invert = false;
aa_invert = p1.y < p2.y ? false : true; /*Direction of opacity increase on the edges*/
if(p1.x != p2.x && p1.y != p2.y) width--; /*Because of anti aliasing (no anti aliasing on hor. and ver. lines)*/
#endif
/*Make the correction on lie width*/
if(width > 0) {
width = (width * width_corr_array[wcor]);
width = width >> LINE_WIDTH_CORR_SHIFT;
width_half = width >> 1;
width_1 = width & 0x1 ? 1 : 0;
}
/*Special case draw a horizontal line*/
if(p1.y == p2.y ) {
lv_area_t act_area;
act_area.x1 = p1.x;
act_area.x2 = p2.x;
act_area.y1 = p1.y - width_half - width_1;
act_area.y2 = p2.y + width_half ;
lv_area_t draw_area;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
return;
}
/*Special case draw a vertical line*/
if(p1.x == p2.x ) {
lv_area_t act_area;
act_area.x1 = p1.x - width_half;
act_area.x2 = p2.x + width_half + width_1;
act_area.y1 = p1.y;
act_area.y2 = p2.y;
lv_area_t draw_area;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
return;
}
while(1){
if(hor == true && last_y != act_point.y) {
lv_area_t act_area;
lv_area_t draw_area;
act_area.x1 = last_x;
act_area.x2 = act_point.x - sx;
act_area.y1 = last_y - width_half ;
act_area.y2 = act_point.y - sy + width_half + width_1;
last_y = act_point.y;
last_x = act_point.x;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
if(width >= 0) {
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
}
#if LV_ANTIALIAS != 0
lv_coord_t seg_w = lv_area_get_width(&draw_area); /*Segment width*/
lv_point_t aa_p1;
lv_point_t aa_p2;
aa_p1.x = draw_area.x1;
aa_p1.y = draw_area.y1 - 1;
aa_p2.x = draw_area.x1;
aa_p2.y = draw_area.y1 + width + 1;
lv_coord_t i;
for(i = 0; i < seg_w; i++) {
lv_opa_t aa_opa = antialias_get_opa(seg_w, i, style->line.opa);
px_fp(aa_p1.x + i, aa_p1.y, mask, style->line.color, aa_invert ? aa_opa : style->line.opa - aa_opa);
px_fp(aa_p2.x + i, aa_p2.y, mask, style->line.color, aa_invert ? style->line.opa - aa_opa : aa_opa);
}
#endif
}
if (hor == false && last_x != act_point.x) {
lv_area_t act_area;
lv_area_t draw_area;
act_area.x1 = last_x - width_half;
act_area.x2 = act_point.x - sx + width_half + width_1;
act_area.y1 = last_y ;
act_area.y2 = act_point.y - sy;
last_y = act_point.y;
last_x = act_point.x;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
if(width >= 0) {
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
}
#if LV_ANTIALIAS != 0
lv_coord_t seg_h = lv_area_get_height(&draw_area); /*Segment height*/
lv_point_t aa_p1;
lv_point_t aa_p2;
aa_p1.x = draw_area.x1 - 1;
aa_p1.y = draw_area.y1;
aa_p2.x = draw_area.x1 + width + 1;
aa_p2.y = draw_area.y1;
lv_coord_t i;
for(i = 0; i < seg_h; i++) {
lv_opa_t aa_opa = antialias_get_opa(seg_h, i, style->line.opa);
px_fp(aa_p1.x, aa_p1.y + i, mask, style->line.color, aa_invert ? aa_opa : style->line.opa - aa_opa);
px_fp(aa_p2.x, aa_p2.y + i, mask, style->line.color, aa_invert ? style->line.opa - aa_opa : aa_opa);
}
#endif
}
/*Calc. the next point of the line*/
if (act_point.x == p2.x && act_point.y == p2.y) break;
e2 = err;
if (e2 >-dx) {
err -= dy;
act_point.x += sx;
}
if (e2 < dy) {
err += dx;
act_point.y += sy;
}
}
/*Draw the last part of the line*/
if(hor == true) {
lv_area_t act_area;
lv_area_t draw_area;
act_area.x1 = last_x;
act_area.x2 = act_point.x;
act_area.y1 = last_y - width_half ;
act_area.y2 = act_point.y + width_half + width_1;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
if(width >= 0) {
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
}
#if LV_ANTIALIAS != 0
lv_coord_t seg_w = lv_area_get_width(&draw_area); /*Segment width*/
lv_point_t aa_p1;
lv_point_t aa_p2;
aa_p1.x = draw_area.x1;
aa_p1.y = draw_area.y1 - 1;
aa_p2.x = draw_area.x1;
aa_p2.y = draw_area.y1 + width + 1;
lv_coord_t i;
for(i = 0; i < seg_w; i++) {
lv_opa_t aa_opa = antialias_get_opa(seg_w, i, style->line.opa);
px_fp(aa_p1.x + i, aa_p1.y, mask, style->line.color, aa_invert ? aa_opa : style->line.opa - aa_opa);
px_fp(aa_p2.x + i, aa_p2.y, mask, style->line.color, aa_invert ? style->line.opa - aa_opa : aa_opa);
}
#endif
}
if (hor == false) {
lv_area_t act_area;
lv_area_t draw_area;
act_area.x1 = last_x - width_half;
act_area.x2 = act_point.x + width_half + width_1;
act_area.y1 = last_y;
act_area.y2 = act_point.y;
draw_area.x1 = LV_MATH_MIN(act_area.x1, act_area.x2);
draw_area.x2 = LV_MATH_MAX(act_area.x1, act_area.x2);
draw_area.y1 = LV_MATH_MIN(act_area.y1, act_area.y2);
draw_area.y2 = LV_MATH_MAX(act_area.y1, act_area.y2);
if(width >= 0) {
fill_fp(&draw_area, mask, style->line.color, style->line.opa);
}
#if LV_ANTIALIAS != 0
lv_coord_t seg_h = lv_area_get_height(&draw_area); /*Segment height*/
lv_point_t aa_p1;
lv_point_t aa_p2;
aa_p1.x = draw_area.x1 - 1;
aa_p1.y = draw_area.y1;
aa_p2.x = draw_area.x1 + width + 1;
aa_p2.y = draw_area.y1;
lv_coord_t i;
for(i = 0; i < seg_h; i++) {
lv_opa_t aa_opa = antialias_get_opa(seg_h, i, style->line.opa);
px_fp(aa_p1.x, aa_p1.y + i, mask, style->line.color, aa_invert ? aa_opa : style->line.opa - aa_opa);
px_fp(aa_p2.x, aa_p2.y + i, mask, style->line.color, aa_invert ? style->line.opa - aa_opa : aa_opa);
}
#endif
}
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Draw the middle part (rectangular) of a rectangle
* @param coords the coordinates of the original rectangle
* @param mask the rectangle will be drawn only on this area
* @param rects_p pointer to a rectangle style
*/
static void lv_draw_rect_main_mid(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
uint16_t radius = style->body.radius;
lv_color_t mcolor = style->body.main_color;
lv_color_t gcolor = style->body.grad_color;
uint8_t mix;
lv_opa_t opa = style->body.opa;
lv_coord_t height = lv_area_get_height(coords);
lv_coord_t width = lv_area_get_width(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
/*If the radius is too big then there is no body*/
if(radius > height / 2) return;
lv_area_t work_area;
work_area.x1 = coords->x1;
work_area.x2 = coords->x2;
if(mcolor.full == gcolor.full) {
work_area.y1 = coords->y1 + radius;
work_area.y2 = coords->y2 - radius;
if(style->body.radius != 0) {
#if LV_ANTIALIAS
work_area.y1 += 2;
work_area.y2 -= 2;
#else
work_area.y1 += 1;
work_area.y2 -= 1;
#endif
}
fill_fp(&work_area, mask, mcolor, opa);
} else {
lv_coord_t row;
lv_coord_t row_start = coords->y1 + radius;
lv_coord_t row_end = coords->y2 - radius;
lv_color_t act_color;
if(style->body.radius != 0) {
#if LV_ANTIALIAS
row_start += 2;
row_end -= 2;
#else
row_start += 1;
row_end -= 1;
#endif
}
if(row_start < 0) row_start = 0;
for(row = row_start; row <= row_end; row ++)
{
work_area.y1 = row;
work_area.y2 = row;
mix = (uint32_t)((uint32_t)(coords->y2 - work_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
fill_fp(&work_area, mask, act_color, opa);
}
}
}
/**
* Draw the top and bottom parts (corners) of a rectangle
* @param coords the coordinates of the original rectangle
* @param mask the rectangle will be drawn only on this area
* @param rects_p pointer to a rectangle style
*/
static void lv_draw_rect_main_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
uint16_t radius = style->body.radius;
lv_color_t mcolor = style->body.main_color;
lv_color_t gcolor = style->body.grad_color;
lv_color_t act_color;
lv_opa_t opa = style->body.opa;
uint8_t mix;
lv_coord_t height = lv_area_get_height(coords);
lv_coord_t width = lv_area_get_width(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
lv_point_t lt_origo; /*Left Top origo*/
lv_point_t lb_origo; /*Left Bottom origo*/
lv_point_t rt_origo; /*Right Top origo*/
lv_point_t rb_origo; /*Left Bottom origo*/
lt_origo.x = coords->x1 + radius + LV_ANTIALIAS;
lt_origo.y = coords->y1 + radius + LV_ANTIALIAS;
lb_origo.x = coords->x1 + radius + LV_ANTIALIAS;
lb_origo.y = coords->y2 - radius - LV_ANTIALIAS;
rt_origo.x = coords->x2 - radius - LV_ANTIALIAS;
rt_origo.y = coords->y1 + radius + LV_ANTIALIAS;
rb_origo.x = coords->x2 - radius - LV_ANTIALIAS;
rb_origo.y = coords->y2 - radius - LV_ANTIALIAS;
lv_area_t edge_top_area;
lv_area_t mid_top_area;
lv_area_t mid_bot_area;
lv_area_t edge_bot_area;
lv_point_t cir;
lv_coord_t cir_tmp;
lv_circ_init(&cir, &cir_tmp, radius);
/*Init the areas*/
lv_area_set(&mid_bot_area, lb_origo.x + LV_CIRC_OCT4_X(cir),
lb_origo.y + LV_CIRC_OCT4_Y(cir),
rb_origo.x + LV_CIRC_OCT1_X(cir),
rb_origo.y + LV_CIRC_OCT1_Y(cir));
lv_area_set(&edge_bot_area, lb_origo.x + LV_CIRC_OCT3_X(cir),
lb_origo.y + LV_CIRC_OCT3_Y(cir),
rb_origo.x + LV_CIRC_OCT2_X(cir),
rb_origo.y + LV_CIRC_OCT2_Y(cir));
lv_area_set(&mid_top_area, lt_origo.x + LV_CIRC_OCT5_X(cir),
lt_origo.y + LV_CIRC_OCT5_Y(cir),
rt_origo.x + LV_CIRC_OCT8_X(cir),
rt_origo.y + LV_CIRC_OCT8_Y(cir));
lv_area_set(&edge_top_area, lt_origo.x + LV_CIRC_OCT6_X(cir),
lt_origo.y + LV_CIRC_OCT6_Y(cir),
rt_origo.x + LV_CIRC_OCT7_X(cir),
rt_origo.y + LV_CIRC_OCT7_Y(cir));
#if LV_ANTIALIAS
/*Store some internal states for anti-aliasing*/
lv_coord_t out_y_seg_start = 0;
lv_coord_t out_y_seg_end = 0;
lv_coord_t out_x_last = radius;
lv_color_t aa_color_hor_top;
lv_color_t aa_color_hor_bottom;
lv_color_t aa_color_ver;
#endif
while(lv_circ_cont(&cir)) {
#if LV_ANTIALIAS != 0
/*New step in y on the outter circle*/
if(out_x_last != cir.x) {
out_y_seg_end = cir.y;
lv_coord_t seg_size = out_y_seg_end - out_y_seg_start;
lv_point_t aa_p;
aa_p.x = out_x_last;
aa_p.y = out_y_seg_start;
mix = (uint32_t)((uint32_t)(radius - out_x_last) * 255) / height;
aa_color_hor_top = lv_color_mix(gcolor, mcolor, mix);
aa_color_hor_bottom = lv_color_mix(mcolor, gcolor, mix);
lv_coord_t i;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa;
if(seg_size > CIRCLE_AA_NON_LINEAR_OPA_THRESHOLD) { /*Use non-linear opa mapping on the first segment*/
aa_opa = antialias_get_opa_circ(seg_size, i, style->body.opa);
} else {
aa_opa = opa - antialias_get_opa(seg_size, i, style->body.opa);
}
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) + 1, mask, aa_color_hor_bottom, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) + 1, mask, aa_color_hor_bottom, aa_opa);
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) - 1, mask, aa_color_hor_top, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) - 1, mask, aa_color_hor_top, aa_opa);
mix = (uint32_t)((uint32_t)(radius - out_y_seg_start + i) * 255) / height;
aa_color_ver = lv_color_mix(mcolor, gcolor, mix);
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) + 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, aa_color_ver, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) - 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, aa_color_ver, aa_opa);
aa_color_ver = lv_color_mix(gcolor, mcolor, mix);
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) - 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, aa_color_ver, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) + 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, aa_color_ver, aa_opa);
}
out_x_last = cir.x;
out_y_seg_start = out_y_seg_end;
}
#endif
uint8_t edge_top_refr = 0;
uint8_t mid_top_refr = 0;
uint8_t mid_bot_refr = 0;
uint8_t edge_bot_refr = 0;
/* If a new row coming draw the previous
* The y coordinate can remain the same so wait for a new*/
if(mid_bot_area.y1 != LV_CIRC_OCT4_Y(cir) + lb_origo.y ) mid_bot_refr = 1;
if(edge_bot_area.y1 != LV_CIRC_OCT2_Y(cir) + lb_origo.y) edge_bot_refr = 1;
if(mid_top_area.y1 != LV_CIRC_OCT8_Y(cir) + lt_origo.y) mid_top_refr = 1;
if(edge_top_area.y1 != LV_CIRC_OCT7_Y(cir) + lt_origo.y) edge_top_refr = 1;
/*Draw the areas which are not disabled*/
if(edge_top_refr != 0){
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - edge_top_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&edge_top_area, mask, act_color, opa);
}
if(mid_top_refr != 0) {
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - mid_top_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&mid_top_area, mask, act_color, opa);
}
if(mid_bot_refr != 0) {
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - mid_bot_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&mid_bot_area, mask, act_color, opa);
}
if(edge_bot_refr != 0) {
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - edge_bot_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&edge_bot_area, mask, act_color, opa);
}
/*Save the current coordinates*/
lv_area_set(&mid_bot_area, lb_origo.x + LV_CIRC_OCT4_X(cir),
lb_origo.y + LV_CIRC_OCT4_Y(cir),
rb_origo.x + LV_CIRC_OCT1_X(cir),
rb_origo.y + LV_CIRC_OCT1_Y(cir));
lv_area_set(&edge_bot_area, lb_origo.x + LV_CIRC_OCT3_X(cir),
lb_origo.y + LV_CIRC_OCT3_Y(cir),
rb_origo.x + LV_CIRC_OCT2_X(cir),
rb_origo.y + LV_CIRC_OCT2_Y(cir));
lv_area_set(&mid_top_area, lt_origo.x + LV_CIRC_OCT5_X(cir),
lt_origo.y + LV_CIRC_OCT5_Y(cir),
rt_origo.x + LV_CIRC_OCT8_X(cir),
rt_origo.y + LV_CIRC_OCT8_Y(cir));
lv_area_set(&edge_top_area, lt_origo.x + LV_CIRC_OCT6_X(cir),
lt_origo.y + LV_CIRC_OCT6_Y(cir),
rt_origo.x + LV_CIRC_OCT7_X(cir),
rt_origo.y + LV_CIRC_OCT7_Y(cir));
lv_circ_next(&cir, &cir_tmp);
}
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - edge_top_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&edge_top_area, mask, act_color, opa);
if(edge_top_area.y1 != mid_top_area.y1) {
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - mid_top_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&mid_top_area, mask, act_color, opa);
}
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - mid_bot_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&mid_bot_area, mask, act_color, opa);
if(edge_bot_area.y1 != mid_bot_area.y1) {
if(mcolor.full == gcolor.full) act_color = mcolor;
else {
mix = (uint32_t)((uint32_t)(coords->y2 - edge_bot_area.y1) * 255) / height;
act_color = lv_color_mix(mcolor, gcolor, mix);
}
fill_fp(&edge_bot_area, mask, act_color, opa);
}
#if LV_ANTIALIAS
/*The first and the last line is not drawn*/
edge_top_area.x1 = coords->x1 + radius + 2;
edge_top_area.x2 = coords->x2 - radius - 2;
edge_top_area.y1 = coords->y1;
edge_top_area.y2 = coords->y1;
fill_fp(&edge_top_area, mask, style->body.main_color, opa);
edge_top_area.y1 = coords->y2;
edge_top_area.y2 = coords->y2;
fill_fp(&edge_top_area, mask, style->body.grad_color, opa);
/*Last parts of the anti-alias*/
out_y_seg_end = cir.y;
lv_coord_t seg_size = out_y_seg_end - out_y_seg_start;
lv_point_t aa_p;
aa_p.x = out_x_last;
aa_p.y = out_y_seg_start;
mix = (uint32_t)((uint32_t)(radius - out_x_last) * 255) / height;
aa_color_hor_bottom = lv_color_mix(gcolor, mcolor, mix);
aa_color_hor_top = lv_color_mix(mcolor, gcolor, mix);
lv_coord_t i;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa = opa - antialias_get_opa(seg_size, i, opa);
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) + 1, mask, aa_color_hor_top, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) + 1, mask, aa_color_hor_top, aa_opa);
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) - 1, mask, aa_color_hor_bottom, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) - 1, mask, aa_color_hor_bottom, aa_opa);
mix = (uint32_t)((uint32_t)(radius - out_y_seg_start + i) * 255) / height;
aa_color_ver = lv_color_mix(mcolor, gcolor, mix);
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) + 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, aa_color_ver, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) - 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, aa_color_ver, aa_opa);
aa_color_ver = lv_color_mix(gcolor, mcolor, mix);
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) - 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, aa_color_ver, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) + 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, aa_color_ver, aa_opa);
}
/*In some cases the last pixel is not drawn*/
if(LV_MATH_ABS(aa_p.x - aa_p.y) == seg_size) {
aa_p.x = out_x_last;
aa_p.y = out_x_last;
mix = (uint32_t)((uint32_t)(out_x_last) * 255) / height;
aa_color_hor_top = lv_color_mix(gcolor, mcolor, mix);
aa_color_hor_bottom = lv_color_mix(mcolor, gcolor, mix);
lv_opa_t aa_opa = style->body.opa >> 1;
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p), rb_origo.y + LV_CIRC_OCT2_Y(aa_p), mask, aa_color_hor_bottom, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p), lb_origo.y + LV_CIRC_OCT4_Y(aa_p), mask, aa_color_hor_bottom, aa_opa);
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p), lt_origo.y + LV_CIRC_OCT6_Y(aa_p), mask, aa_color_hor_top, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p), rt_origo.y + LV_CIRC_OCT8_Y(aa_p), mask, aa_color_hor_top, aa_opa);
}
#endif
}
/**
* Draw the straight parts of a rectangle border
* @param coords the coordinates of the original rectangle
* @param mask_ the rectangle will be drawn only on this area
* @param rstyle pointer to a rectangle style
*/
static void lv_draw_rect_border_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
uint16_t radius = style->body.radius;
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
uint16_t bwidth = style->body.border.width;
lv_opa_t opa = style->body.border.opa;
lv_border_part_t part = style->body.border.part;
lv_color_t color = style->body.border.color;
lv_area_t work_area;
lv_coord_t length_corr = 0;
lv_coord_t corner_size = 0;
/*the 0 px border width drawn as 1 px, so decrement the b_width*/
bwidth--;
radius = lv_draw_cont_radius_corr(radius, width, height);
if(radius < bwidth) {
length_corr = bwidth - radius - LV_ANTIALIAS;
corner_size = bwidth;
} else {
corner_size = radius + LV_ANTIALIAS;
}
/* Modify the corner_size if corner is drawn */
corner_size ++;
/*Depending one which part's are drawn modify the area lengths */
if(part & LV_BORDER_TOP) work_area.y1 = coords->y1 + corner_size;
else work_area.y1 = coords->y1 + radius;
if(part & LV_BORDER_BOTTOM) work_area.y2 = coords->y2 - corner_size;
else work_area.y2 = coords->y2 - radius;
/*Left border*/
if(part & LV_BORDER_LEFT) {
work_area.x1 = coords->x1;
work_area.x2 = work_area.x1 + bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Right border*/
if(part & LV_BORDER_RIGHT) {
work_area.x2 = coords->x2;
work_area.x1 = work_area.x2 - bwidth;
fill_fp(&work_area, mask, color, opa);
}
work_area.x1 = coords->x1 + corner_size - length_corr;
work_area.x2 = coords->x2 - corner_size + length_corr;
/*Upper border*/
if(part & LV_BORDER_TOP) {
work_area.y1 = coords->y1;
work_area.y2 = coords->y1 + bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Lower border*/
if(part & LV_BORDER_BOTTOM) {
work_area.y2 = coords->y2;
work_area.y1 = work_area.y2 - bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Draw the a remaining rectangles if the radius is smaller then bwidth */
if(length_corr != 0) {
/*Left top correction*/
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x1 + radius + LV_ANTIALIAS;
work_area.y1 = coords->y1 + radius + 1 + LV_ANTIALIAS;
work_area.y2 = coords->y1 + bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Right top correction*/
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
work_area.x1 = coords->x2 - radius - LV_ANTIALIAS;
work_area.x2 = coords->x2;
work_area.y1 = coords->y1 + radius + 1 + LV_ANTIALIAS;
work_area.y2 = coords->y1 + bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Left bottom correction*/
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x1 + radius + LV_ANTIALIAS;
work_area.y1 = coords->y2 - bwidth;
work_area.y2 = coords->y2 - radius - 1 - LV_ANTIALIAS;
fill_fp(&work_area, mask, color, opa);
}
/*Right bottom correction*/
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
work_area.x1 = coords->x2 - radius - LV_ANTIALIAS;
work_area.x2 = coords->x2;
work_area.y1 = coords->y2 - bwidth;
work_area.y2 = coords->y2 - radius - 1 - LV_ANTIALIAS;
fill_fp(&work_area, mask, color, opa);
}
}
/*If radius == 0 one px on the corners are not drawn by main drawer*/
if(style->body.radius == 0) {
/*Left top corner*/
if(part & (LV_BORDER_TOP | LV_BORDER_LEFT)) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x1 + LV_ANTIALIAS;
work_area.y1 = coords->y1;
work_area.y2 = coords->y1 + LV_ANTIALIAS;
fill_fp(&work_area, mask, color, opa);
}
/*Right top corner*/
if(part & (LV_BORDER_TOP | LV_BORDER_RIGHT)) {
work_area.x1 = coords->x2 - LV_ANTIALIAS;
work_area.x2 = coords->x2;
work_area.y1 = coords->y1;
work_area.y2 = coords->y1 + LV_ANTIALIAS;
fill_fp(&work_area, mask, color, opa);
}
/*Left bottom corner*/
if(part & (LV_BORDER_BOTTOM | LV_BORDER_LEFT)) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x1 + LV_ANTIALIAS;
work_area.y1 = coords->y2 - LV_ANTIALIAS;
work_area.y2 = coords->y2;
fill_fp(&work_area, mask, color, opa);
}
/*Right bottom corner*/
if(part & (LV_BORDER_BOTTOM | LV_BORDER_RIGHT)) {
work_area.x1 = coords->x2 - LV_ANTIALIAS;
work_area.x2 = coords->x2;
work_area.y1 = coords->y2 - LV_ANTIALIAS;
work_area.y2 = coords->y2;
fill_fp(&work_area, mask, color, opa);
}
}
}
/**
* Draw the corners of a rectangle border
* @param coords the coordinates of the original rectangle
* @param mask the rectangle will be drawn only on this area
* @param rects_p pointer to a rectangle style
* @param opa opacity of the rectangle (0..255)
*/
static void lv_draw_rect_border_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
uint16_t radius = style->body.radius ;
uint16_t bwidth = style->body.border.width;
lv_color_t color = style->body.border.color;
lv_opa_t opa = style->body.border.opa;
lv_border_part_t part = style->body.border.part;
/*0 px border width drawn as 1 px, so decrement the bwidth*/
bwidth--;
#if LV_ANTIALIAS
bwidth--; /*Because of anti-aliasing the border seems one pixel ticker*/
#endif
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
lv_point_t lt_origo; /*Left Top origo*/
lv_point_t lb_origo; /*Left Bottom origo*/
lv_point_t rt_origo; /*Right Top origo*/
lv_point_t rb_origo; /*Left Bottom origo*/
lt_origo.x = coords->x1 + radius + LV_ANTIALIAS;
lt_origo.y = coords->y1 + radius + LV_ANTIALIAS;
lb_origo.x = coords->x1 + radius + LV_ANTIALIAS;
lb_origo.y = coords->y2 - radius - LV_ANTIALIAS;
rt_origo.x = coords->x2 - radius - LV_ANTIALIAS;
rt_origo.y = coords->y1 + radius + LV_ANTIALIAS;
rb_origo.x = coords->x2 - radius - LV_ANTIALIAS;
rb_origo.y = coords->y2 - radius - LV_ANTIALIAS;
lv_point_t cir_out;
lv_coord_t tmp_out;
lv_circ_init(&cir_out, &tmp_out, radius);
lv_point_t cir_in;
lv_coord_t tmp_in;
lv_coord_t radius_in = radius - bwidth;
if(radius_in < 0){
radius_in = 0;
}
lv_circ_init(&cir_in, &tmp_in, radius_in);
lv_area_t circ_area;
lv_coord_t act_w1;
lv_coord_t act_w2;
#if LV_ANTIALIAS
/*Store some internal states for anti-aliasing*/
lv_coord_t out_y_seg_start = 0;
lv_coord_t out_y_seg_end = 0;
lv_coord_t out_x_last = radius;
lv_coord_t in_y_seg_start = 0;
lv_coord_t in_y_seg_end = 0;
lv_coord_t in_x_last = radius - bwidth;
#endif
while( cir_out.y <= cir_out.x) {
/*Calculate the actual width to avoid overwriting pixels*/
if(cir_in.y < cir_in.x) {
act_w1 = cir_out.x - cir_in.x;
act_w2 = act_w1;
} else {
act_w1 = cir_out.x - cir_out.y;
act_w2 = act_w1 - 1;
}
#if LV_ANTIALIAS != 0
/*New step in y on the outter circle*/
if(out_x_last != cir_out.x) {
out_y_seg_end = cir_out.y;
lv_coord_t seg_size = out_y_seg_end - out_y_seg_start;
lv_point_t aa_p;
aa_p.x = out_x_last;
aa_p.y = out_y_seg_start;
lv_coord_t i;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa;
if(seg_size > CIRCLE_AA_NON_LINEAR_OPA_THRESHOLD) { /*Use non-linear opa mapping on the first segment*/
aa_opa = antialias_get_opa_circ(seg_size, i, style->body.border.opa);
} else {
aa_opa = style->body.border.opa - antialias_get_opa(seg_size, i, style->body.border.opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) + 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) - 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) - 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) + 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
}
out_x_last = cir_out.x;
out_y_seg_start = out_y_seg_end;
}
/*New step in y on the inner circle*/
if(in_x_last != cir_in.x) {
in_y_seg_end = cir_out.y;
lv_coord_t seg_size = in_y_seg_end - in_y_seg_start;
lv_point_t aa_p;
aa_p.x = in_x_last;
aa_p.y = in_y_seg_start;
lv_coord_t i;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa;
if(seg_size > CIRCLE_AA_NON_LINEAR_OPA_THRESHOLD) { /*Use non-linear opa mapping on the first segment*/
aa_opa = style->body.border.opa - antialias_get_opa_circ(seg_size, i, style->body.border.opa);
} else {
aa_opa = antialias_get_opa(seg_size, i, style->body.border.opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) - 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) + 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
/*Be sure the pixels on the middle are not drawn twice*/
if(LV_CIRC_OCT1_X(aa_p) - 1 != LV_CIRC_OCT2_X(aa_p) + i) {
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) + 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) - 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
}
}
in_x_last = cir_in.x;
in_y_seg_start = in_y_seg_end;
}
#endif
/*Draw the octets to the right bottom corner*/
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
circ_area.x1 = rb_origo.x + LV_CIRC_OCT1_X(cir_out) - act_w2;
circ_area.x2 = rb_origo.x + LV_CIRC_OCT1_X(cir_out);
circ_area.y1 = rb_origo.y + LV_CIRC_OCT1_Y(cir_out);
circ_area.y2 = rb_origo.y + LV_CIRC_OCT1_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
circ_area.x1 = rb_origo.x + LV_CIRC_OCT2_X(cir_out);
circ_area.x2 = rb_origo.x + LV_CIRC_OCT2_X(cir_out);
circ_area.y1 = rb_origo.y + LV_CIRC_OCT2_Y(cir_out)- act_w1;
circ_area.y2 = rb_origo.y + LV_CIRC_OCT2_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
}
/*Draw the octets to the left bottom corner*/
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
circ_area.x1 = lb_origo.x + LV_CIRC_OCT3_X(cir_out);
circ_area.x2 = lb_origo.x + LV_CIRC_OCT3_X(cir_out);
circ_area.y1 = lb_origo.y + LV_CIRC_OCT3_Y(cir_out) - act_w2;
circ_area.y2 = lb_origo.y + LV_CIRC_OCT3_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
circ_area.x1 = lb_origo.x + LV_CIRC_OCT4_X(cir_out);
circ_area.x2 = lb_origo.x + LV_CIRC_OCT4_X(cir_out) + act_w1;
circ_area.y1 = lb_origo.y + LV_CIRC_OCT4_Y(cir_out);
circ_area.y2 = lb_origo.y + LV_CIRC_OCT4_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
}
/*Draw the octets to the left top corner*/
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
if(lb_origo.y + LV_CIRC_OCT4_Y(cir_out) > lt_origo.y + LV_CIRC_OCT5_Y(cir_out)) {
/*Don't draw if the lines are common in the middle*/
circ_area.x1 = lt_origo.x + LV_CIRC_OCT5_X(cir_out);
circ_area.x2 = lt_origo.x + LV_CIRC_OCT5_X(cir_out) + act_w2;
circ_area.y1 = lt_origo.y + LV_CIRC_OCT5_Y(cir_out);
circ_area.y2 = lt_origo.y + LV_CIRC_OCT5_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
}
circ_area.x1 = lt_origo.x + LV_CIRC_OCT6_X(cir_out);
circ_area.x2 = lt_origo.x + LV_CIRC_OCT6_X(cir_out);
circ_area.y1 = lt_origo.y + LV_CIRC_OCT6_Y(cir_out);
circ_area.y2 = lt_origo.y + LV_CIRC_OCT6_Y(cir_out) + act_w1;
fill_fp(&circ_area, mask, color, opa);
}
/*Draw the octets to the right top corner*/
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
circ_area.x1 = rt_origo.x + LV_CIRC_OCT7_X(cir_out);
circ_area.x2 = rt_origo.x + LV_CIRC_OCT7_X(cir_out);
circ_area.y1 = rt_origo.y + LV_CIRC_OCT7_Y(cir_out);
circ_area.y2 = rt_origo.y + LV_CIRC_OCT7_Y(cir_out) + act_w2;
fill_fp(&circ_area, mask, color, opa);
/*Don't draw if the lines are common in the middle*/
if(rb_origo.y + LV_CIRC_OCT1_Y(cir_out) > rt_origo.y + LV_CIRC_OCT8_Y(cir_out)) {
circ_area.x1 = rt_origo.x + LV_CIRC_OCT8_X(cir_out) - act_w1;
circ_area.x2 = rt_origo.x + LV_CIRC_OCT8_X(cir_out);
circ_area.y1 = rt_origo.y + LV_CIRC_OCT8_Y(cir_out);
circ_area.y2 = rt_origo.y + LV_CIRC_OCT8_Y(cir_out);
fill_fp(&circ_area, mask, color, opa);
}
}
lv_circ_next(&cir_out, &tmp_out);
/*The internal circle will be ready faster
* so check it! */
if(cir_in.y < cir_in.x) {
lv_circ_next(&cir_in, &tmp_in);
}
}
#if LV_ANTIALIAS != 0
/*Last parts of the outer anti-alias*/
out_y_seg_end = cir_out.y;
lv_coord_t seg_size = out_y_seg_end - out_y_seg_start;
lv_point_t aa_p;
aa_p.x = out_x_last;
aa_p.y = out_y_seg_start;
lv_coord_t i;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa = style->body.border.opa - antialias_get_opa(seg_size, i, style->body.border.opa);
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) + 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) - 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) - 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) + 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
}
/*In some cases the last pixel in the outer middle is not drawn*/
if(LV_MATH_ABS(aa_p.x - aa_p.y) == seg_size) {
aa_p.x = out_x_last;
aa_p.y = out_x_last;
lv_opa_t aa_opa = style->body.border.opa >> 1;
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p), rb_origo.y + LV_CIRC_OCT2_Y(aa_p), mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p), lb_origo.y + LV_CIRC_OCT4_Y(aa_p), mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p), lt_origo.y + LV_CIRC_OCT6_Y(aa_p), mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p), rt_origo.y + LV_CIRC_OCT8_Y(aa_p), mask, style->body.border.color, aa_opa);
}
}
/*Last parts of the inner anti-alias*/
in_y_seg_end = cir_in.y;
aa_p.x = in_x_last;
aa_p.y = in_y_seg_start;
seg_size = in_y_seg_end - in_y_seg_start;
for(i = 0; i < seg_size; i++) {
lv_opa_t aa_opa = antialias_get_opa(seg_size, i, style->body.border.opa);
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT1_X(aa_p) - 1, rb_origo.y + LV_CIRC_OCT1_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT3_X(aa_p) - i, lb_origo.y + LV_CIRC_OCT3_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT5_X(aa_p) + 1, lt_origo.y + LV_CIRC_OCT5_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT7_X(aa_p) + i, rt_origo.y + LV_CIRC_OCT7_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
if(LV_CIRC_OCT1_X(aa_p) - 1 != LV_CIRC_OCT2_X(aa_p) + i) {
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_RIGHT)) {
px_fp(rb_origo.x + LV_CIRC_OCT2_X(aa_p) + i, rb_origo.y + LV_CIRC_OCT2_Y(aa_p) - 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_BOTTOM) && (part & LV_BORDER_LEFT)) {
px_fp(lb_origo.x + LV_CIRC_OCT4_X(aa_p) + 1, lb_origo.y + LV_CIRC_OCT4_Y(aa_p) + i, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_LEFT)) {
px_fp(lt_origo.x + LV_CIRC_OCT6_X(aa_p) - i, lt_origo.y + LV_CIRC_OCT6_Y(aa_p) + 1, mask, style->body.border.color, aa_opa);
}
if((part & LV_BORDER_TOP) && (part & LV_BORDER_RIGHT)) {
px_fp(rt_origo.x + LV_CIRC_OCT8_X(aa_p) - 1, rt_origo.y + LV_CIRC_OCT8_Y(aa_p) - i, mask, style->body.border.color, aa_opa);
}
}
}
#endif
}
#if USE_LV_SHADOW && LV_VDB_SIZE
/**
* Draw a shadow
* @param rect pointer to rectangle object
* @param mask pointer to a mask area (from the design functions)
*/
static void lv_draw_shadow(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
/* If mask is in the middle of cords do not draw shadow*/
lv_coord_t radius = style->body.radius;
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
lv_area_t area_tmp;
/*Check horizontally without radius*/
lv_area_copy(&area_tmp, coords);
area_tmp.x1 += radius;
area_tmp.x2 -= radius;
if(lv_area_is_in(mask, &area_tmp) != false) return;
/*Check vertically without radius*/
lv_area_copy(&area_tmp, coords);
area_tmp.y1 += radius;
area_tmp.y2 -= radius;
if(lv_area_is_in(mask, &area_tmp) != false) return;
if(style->body.shadow.type == LV_SHADOW_FULL) {
lv_draw_shadow_full(coords, mask, style);
} else if(style->body.shadow.type == LV_SHADOW_BOTTOM) {
lv_draw_shadow_bottom(coords, mask, style);
}
}
static void lv_draw_shadow_full(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
lv_coord_t radius = style->body.radius;
lv_coord_t swidth = style->body.shadow.width;
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
if(radius != 0) radius -= LV_ANTIALIAS;
swidth += LV_ANTIALIAS;
lv_coord_t curve_x[radius + swidth + 1]; /*Stores the 'x' coordinates of a quarter circle.*/
memset(curve_x, 0, sizeof(curve_x));
lv_point_t circ;
lv_coord_t circ_tmp;
lv_circ_init(&circ, &circ_tmp, radius);
while(lv_circ_cont(&circ)) {
curve_x[LV_CIRC_OCT1_Y(circ)] = LV_CIRC_OCT1_X(circ);
curve_x[LV_CIRC_OCT2_Y(circ)] = LV_CIRC_OCT2_X(circ);
lv_circ_next(&circ, &circ_tmp);
}
int16_t line;
int16_t filter_width = 2 * swidth + 1;
uint32_t line_1d_blur[filter_width];
/*1D Blur horizontally*/
for(line = 0; line < filter_width; line++) {
line_1d_blur[line] = (uint32_t)((uint32_t)(filter_width - line) * (style->body.opa * 2) << SHADOW_OPA_EXTRA_PRECISION) / (filter_width * filter_width);
}
uint16_t col;
lv_opa_t line_2d_blur[radius + swidth];
lv_point_t point_rt;
lv_point_t point_rb;
lv_point_t point_lt;
lv_point_t point_lb;
lv_point_t ofs_rb;
lv_point_t ofs_rt;
lv_point_t ofs_lb;
lv_point_t ofs_lt;
ofs_rb.x = coords->x2 - radius - LV_ANTIALIAS;
ofs_rb.y = coords->y2 - radius - LV_ANTIALIAS;
ofs_rt.x = coords->x2 - radius - LV_ANTIALIAS;
ofs_rt.y = coords->y1 + radius + LV_ANTIALIAS;
ofs_lb.x = coords->x1 + radius + LV_ANTIALIAS;
ofs_lb.y = coords->y2 - radius - LV_ANTIALIAS;
ofs_lt.x = coords->x1 + radius + LV_ANTIALIAS;
ofs_lt.y = coords->y1 + radius + LV_ANTIALIAS;
bool line_ready;
for(line = 1; line <= radius + swidth; line++) { /*Check all rows and make the 1D blur to 2D*/
line_ready = false;
for(col = 1; col < radius + swidth + 10; col++) { /*Check all pixels in a 1D blur line (from the origo to last shadow pixel (radius + swidth))*/
/*Sum the opacities from the lines above and below this 'row'*/
int16_t line_rel;
uint32_t px_opa_sum = 0;
for(line_rel = -swidth; line_rel <= swidth; line_rel ++) {
/*Get the relative x position of the 'line_rel' to 'line'*/
int16_t col_rel;
if(line + line_rel < 0) { /*Below the radius, here is the blur of the edge */
col_rel = radius - curve_x[line] - col;
} else if(line + line_rel > radius) { /*Above the radius, here won't be more 1D blur*/
break;
} else { /*Blur from the curve*/
col_rel = curve_x[line + line_rel] - curve_x[line] - col;
}
/*Add the value of the 1D blur on 'col_rel' position*/
if(col_rel < -swidth) { /*Outside of the burred area. */
if(line_rel == -swidth) line_ready = true; /*If no data even on the very first line then it wont't be anything else in this line*/
break; /*Break anyway because only smaller 'col_rel' values will come */
}
else if (col_rel > swidth) px_opa_sum += line_1d_blur[0]; /*Inside the not blurred area*/
else px_opa_sum += line_1d_blur[swidth - col_rel]; /*On the 1D blur (+ swidth to align to the center)*/
}
line_2d_blur[col] = px_opa_sum >> SHADOW_OPA_EXTRA_PRECISION;
if(line_ready) break;
}
/*Flush the line*/
point_rt.x = curve_x[line] + ofs_rt.x + 1;
point_rt.y = ofs_rt.y - line;
point_rb.x = curve_x[line] + ofs_rb.x + 1;
point_rb.y = ofs_rb.y + line;
point_lt.x = ofs_lt.x - curve_x[line] - 1;
point_lt.y = ofs_lt.y - line;
point_lb.x = ofs_lb.x - curve_x[line] - 1;
point_lb.y = ofs_lb.y + line;
uint16_t d;
for(d = 1; d <= col; d++) {
if(point_rt.x != point_lt.x) {
px_fp(point_lt.x,point_lt.y , mask, style->body.shadow.color, line_2d_blur[d]);
}
if(point_rb.x != point_lb.x && point_lt.y != point_lb.y) {
px_fp(point_lb.x,point_lb.y , mask, style->body.shadow.color, line_2d_blur[d]);
}
if(point_lt.y != point_lb.y) {
px_fp(point_rb.x,point_rb.y , mask, style->body.shadow.color, line_2d_blur[d]);
}
px_fp(point_rt.x,point_rt.y , mask, style->body.shadow.color, line_2d_blur[d]);
point_rb.x++;
point_lb.x--;
point_rt.x++;
point_lt.x--;
}
/* Put the first line to the edges too.
* It is not correct because blur should be done below the corner too
* but is is simple, fast and gives a good enough result*/
if(line == 1) lv_draw_shadow_full_straight(coords, mask, style, line_2d_blur);
}
}
static void lv_draw_shadow_bottom(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style)
{
lv_coord_t radius = style->body.radius;
lv_coord_t swidth = style->body.shadow.width;
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
radius += LV_ANTIALIAS * SHADOW_BOTTOM_AA_EXTRA_RADIUS;
swidth += LV_ANTIALIAS;
lv_coord_t curve_x[radius + 1]; /*Stores the 'x' coordinates of a quarter circle.*/
lv_point_t circ;
lv_coord_t circ_tmp;
lv_circ_init(&circ, &circ_tmp, radius);
while(lv_circ_cont(&circ)) {
curve_x[LV_CIRC_OCT1_Y(circ)] = LV_CIRC_OCT1_X(circ);
curve_x[LV_CIRC_OCT2_Y(circ)] = LV_CIRC_OCT2_X(circ);
lv_circ_next(&circ, &circ_tmp);
}
int16_t col;
lv_opa_t line_1d_blur[swidth];
for(col = 0; col < swidth; col++) {
line_1d_blur[col] = (uint32_t)((uint32_t)(swidth - col) * style->body.opa) / (swidth);
}
lv_point_t point_l;
lv_point_t point_r;
lv_area_t area_mid;
lv_point_t ofs_l;
lv_point_t ofs_r;
ofs_l.x = coords->x1 + radius;
ofs_l.y = coords->y2 - radius + 1 - LV_ANTIALIAS;
ofs_r.x = coords->x2 - radius;
ofs_r.y = coords->y2 - radius + 1 - LV_ANTIALIAS;
for(col = 0; col <= radius; col++) {
point_l.x = ofs_l.x + radius - col - radius;
point_l.y = ofs_l.y + curve_x[col];
point_r.x = ofs_r.x + col;
point_r.y = ofs_r.y + curve_x[col];
uint16_t d;
for(d = 0; d < swidth; d++) {
px_fp(point_l.x, point_l.y, mask, style->body.shadow.color, line_1d_blur[d]);
point_l.y ++;
/*Don't overdraw th pixel on the middle*/
if(point_r.x > ofs_l.x) {
px_fp(point_r.x, point_r.y, mask, style->body.shadow.color, line_1d_blur[d]);
point_r.y ++;
}
}
}
area_mid.x1 = ofs_l.x + 1;
area_mid.y1 = ofs_l.y + radius;
area_mid.x2 = ofs_r.x - 1;
area_mid.y2 = area_mid.y1;
uint16_t d;
for(d = 0; d < swidth; d++) {
fill_fp(&area_mid, mask, style->body.shadow.color, line_1d_blur[d]);
area_mid.y1 ++;
area_mid.y2 ++;
}
}
static void lv_draw_shadow_full_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, const lv_opa_t * map)
{
lv_coord_t radius = style->body.radius;
lv_coord_t swidth = style->body.shadow.width + LV_ANTIALIAS;
lv_coord_t width = lv_area_get_width(coords);
lv_coord_t height = lv_area_get_height(coords);
radius = lv_draw_cont_radius_corr(radius, width, height);
if(radius == 0) radius += LV_ANTIALIAS;
lv_area_t right_area;
right_area.x1 = coords->x2 + 1 - LV_ANTIALIAS;
right_area.y1 = coords->y1 + radius;
right_area.x2 = right_area.x1;
right_area.y2 = coords->y2 - radius;
lv_area_t left_area;
left_area.x1 = coords->x1 - 1 + LV_ANTIALIAS;
left_area.y1 = coords->y1 + radius;
left_area.x2 = left_area.x1;
left_area.y2 = coords->y2 - radius;
lv_area_t top_area;
top_area.x1 = coords->x1 + radius;
top_area.y1 = coords->y1 - 1 + LV_ANTIALIAS;
top_area.x2 = coords->x2 - radius;
top_area.y2 = top_area.y1;
lv_area_t bottom_area;
bottom_area.x1 = coords->x1 + radius;
bottom_area.y1 = coords->y2 + 1 - LV_ANTIALIAS;
bottom_area.x2 = coords->x2 - radius;
bottom_area.y2 = bottom_area.y1;
lv_opa_t opa_act;
int16_t d;
for(d = 1; d <= swidth; d++) {
opa_act = map[d];
fill_fp(&right_area, mask, style->body.shadow.color, opa_act);
right_area.x1++;
right_area.x2++;
fill_fp(&left_area, mask, style->body.shadow.color, opa_act);
left_area.x1--;
left_area.x2--;
fill_fp(&top_area, mask, style->body.shadow.color, opa_act);
top_area.y1--;
top_area.y2--;
fill_fp(&bottom_area, mask, style->body.shadow.color, opa_act);
bottom_area.y1++;
bottom_area.y2++;
}
}
#endif
static uint16_t lv_draw_cont_radius_corr(uint16_t r, lv_coord_t w, lv_coord_t h)
{
if(r >= (w >> 1)){
r = (w >> 1);
if(r != 0) r--;
}
if(r >= (h >> 1)) {
r = (h >> 1);
if(r != 0) r--;
}
if(r > 0) r -= LV_ANTIALIAS;
return r;
}
#if LV_ANTIALIAS != 0
static lv_opa_t antialias_get_opa(lv_coord_t seg, lv_coord_t px_id, lv_opa_t line_opa)
{
/* How to calculate the opacity of pixels on the edges which makes the anti-aliasing?
* For example we have a line like this (y = -0.5 * x):
*
* | _ _
* * * |
*
* Anti-aliased pixels come to the '*' characters
* Calculate what percentage of the pixels should be covered if real line (not rasterized) would be drawn:
* 1. A real line should start on (0;0) and end on (2;1)
* 2. So the line intersection coordinates on the first pixel: (0;0) (1;0.5) -> 25% covered pixel in average
* 3. For the second pixel: (1;0.5) (2;1) -> 75% covered pixel in average
* 4. The equation: (px_id * 2 + 1) / (segment_width * 2)
* segment_width: the line segment which is being anti-aliased (was 2 in the example)
* px_id: pixel ID from 0 to (segment_width - 1)
* result: [0..1] coverage of the pixel
*/
/*Accelerate the common segment sizes to avoid division*/
static const lv_opa_t seg1[1] = {128};
static const lv_opa_t seg2[2] = {64, 192};
static const lv_opa_t seg3[3] = {42, 128, 212};
static const lv_opa_t seg4[4] = {32, 96, 159, 223};
static const lv_opa_t seg5[5] = {26, 76, 128, 178, 230};
static const lv_opa_t seg6[6] = {21, 64, 106, 148, 191, 234};
static const lv_opa_t seg7[7] = {18, 55, 91, 128, 164, 200, 237};
static const lv_opa_t seg8[8] = {16, 48, 80, 112, 143, 175, 207, 239};
static const lv_opa_t * seg_map[] = {seg1, seg2, seg3, seg4,
seg5, seg6, seg7, seg8};
if(seg == 0) return LV_OPA_TRANSP;
else if(seg < 8) return (uint32_t)((uint32_t)seg_map[seg - 1][px_id] * line_opa) >> 8;
else {
return ((px_id * 2 + 1) * line_opa) / (2 * seg);
}
}
/**
* Approximate the opacity for anti-aliasing.
* Used the first segment of a circle which is the longest and have the most non-linearity (cos)
* @param seg
* @param px_id
* @param line_opa
* @return
*/
static lv_opa_t antialias_get_opa_circ(lv_coord_t seg, lv_coord_t px_id, lv_opa_t opa)
{
static const lv_opa_t opa_map[8] = {250, 242, 221, 196, 163, 122, 74, 18};
if(seg == 0) return LV_OPA_TRANSP;
else if(seg == 1) return LV_OPA_80;
else {
uint8_t id = (uint32_t) ((uint32_t)px_id * (sizeof(opa_map) - 1)) / (seg - 1);
return (uint32_t) ((uint32_t) opa_map[id] * opa) >> 8;
}
}
#endif
/**
* Convert a hexadecimal characters to a number (0..15)
* @param hex Pointer to a hexadecimal character (0..9, A..F)
* @return the numerical value of `hex` or 0 on error
*/
static uint8_t hex_char_to_num(char hex)
{
if(hex >= '0' && hex <= '9') {
return hex - '0';
}
if(hex >= 'a') hex -= 'a' - 'A'; /*Convert to upper case*/
switch(hex) {
case 'A': return 10;
case 'B': return 11;
case 'C': return 12;
case 'D': return 13;
case 'E': return 14;
case 'F': return 15;
default: return 0;
}
return 0;
}
#if USE_LV_TRIANGLE != 0
/**
* Swap two points
* p1 pointer to the first point
* p2 pointer to the second point
*/
static void point_swap(lv_point_t * p1, lv_point_t * p2)
{
lv_point_t tmp;
tmp.x = p1->x;
tmp.y = p1->y;
p1->x = p2->x;
p1->y = p2->y;
p2->x = tmp.x;
p2->y = tmp.y;
}
#endif
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