478 lines
16 KiB
C
478 lines
16 KiB
C
/**
|
|
* @file lv_draw_line.c
|
|
*
|
|
*/
|
|
|
|
/*********************
|
|
* INCLUDES
|
|
*********************/
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include "lv_draw_mask.h"
|
|
#include "lv_draw_blend.h"
|
|
#include "../lv_core/lv_refr.h"
|
|
#include "../lv_misc/lv_math.h"
|
|
|
|
/*********************
|
|
* DEFINES
|
|
*********************/
|
|
|
|
/**********************
|
|
* TYPEDEFS
|
|
**********************/
|
|
|
|
/**********************
|
|
* STATIC PROTOTYPES
|
|
**********************/
|
|
static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc);
|
|
static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc);
|
|
static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc);
|
|
|
|
/**********************
|
|
* STATIC VARIABLES
|
|
**********************/
|
|
|
|
/**********************
|
|
* MACROS
|
|
**********************/
|
|
|
|
/**********************
|
|
* GLOBAL FUNCTIONS
|
|
**********************/
|
|
|
|
void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc)
|
|
{
|
|
memset(dsc, 0x00, sizeof(lv_draw_line_dsc_t));
|
|
dsc->width = 1;
|
|
dsc->opa = LV_OPA_COVER;
|
|
dsc->color = LV_COLOR_BLACK;
|
|
}
|
|
|
|
/**
|
|
* Draw a line
|
|
* @param point1 first point of the line
|
|
* @param point2 second point of the line
|
|
* @param mask the line will be drawn only on this area
|
|
* @param style pointer to a line's style
|
|
* @param opa_scale scale down all opacities by the factor
|
|
*/
|
|
void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc)
|
|
{
|
|
if(dsc->width == 0) return;
|
|
if(dsc->opa <= LV_OPA_MIN) return;
|
|
|
|
if(point1->x == point2->x && point1->y == point2->y) return;
|
|
|
|
lv_area_t clip_line;
|
|
clip_line.x1 = LV_MATH_MIN(point1->x, point2->x) - dsc->width / 2;
|
|
clip_line.x2 = LV_MATH_MAX(point1->x, point2->x) + dsc->width / 2;
|
|
clip_line.y1 = LV_MATH_MIN(point1->y, point2->y) - dsc->width / 2;
|
|
clip_line.y2 = LV_MATH_MAX(point1->y, point2->y) + dsc->width / 2;
|
|
|
|
bool is_common;
|
|
is_common = lv_area_intersect(&clip_line, &clip_line, clip);
|
|
if(!is_common) return;
|
|
|
|
if(point1->y == point2->y) draw_line_hor(point1, point2, &clip_line, dsc);
|
|
else if(point1->x == point2->x) draw_line_ver(point1, point2, &clip_line, dsc);
|
|
else draw_line_skew(point1, point2, &clip_line, dsc);
|
|
|
|
|
|
if(dsc->round_end || dsc->round_start) {
|
|
lv_draw_rect_dsc_t cir_dsc;
|
|
lv_draw_rect_dsc_init(&cir_dsc);
|
|
cir_dsc.bg_color = dsc->color;
|
|
cir_dsc.radius = LV_RADIUS_CIRCLE;
|
|
cir_dsc.bg_opa = dsc->opa;
|
|
|
|
int32_t r = (dsc->width >> 1);
|
|
int32_t r_corr = (dsc->width & 1) ? 0 : 1;
|
|
lv_area_t cir_area;
|
|
|
|
if(dsc->round_start) {
|
|
cir_area.x1 = point1->x - r;
|
|
cir_area.y1 = point1->y - r;
|
|
cir_area.x2 = point1->x + r - r_corr;
|
|
cir_area.y2 = point1->y + r - r_corr ;
|
|
lv_draw_rect(&cir_area, clip, &cir_dsc);
|
|
}
|
|
|
|
if(dsc->round_end) {
|
|
cir_area.x1 = point2->x - r;
|
|
cir_area.y1 = point2->y - r;
|
|
cir_area.x2 = point2->x + r - r_corr;
|
|
cir_area.y2 = point2->y + r - r_corr ;
|
|
lv_draw_rect(&cir_area, clip, &cir_dsc);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**********************
|
|
* STATIC FUNCTIONS
|
|
**********************/
|
|
|
|
static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc)
|
|
{
|
|
lv_opa_t opa = dsc->opa;
|
|
|
|
lv_disp_t * disp = lv_refr_get_disp_refreshing();
|
|
lv_disp_buf_t * vdb = lv_disp_get_buf(disp);
|
|
|
|
const lv_area_t * disp_area = &vdb->area;
|
|
|
|
int32_t w = dsc->width - 1;
|
|
int32_t w_half0 = w >> 1;
|
|
int32_t w_half1 = w_half0 + (w & 0x1); /*Compensate rounding error*/
|
|
|
|
bool dashed = dsc->dash_gap && dsc->dash_width ? true : false;
|
|
|
|
bool simple_mode = true;
|
|
if(lv_draw_mask_get_cnt()) simple_mode = false;
|
|
else if(dashed) simple_mode = false;
|
|
|
|
lv_area_t draw_area;
|
|
draw_area.x1 = LV_MATH_MIN(point1->x, point2->x);
|
|
draw_area.x2 = LV_MATH_MAX(point1->x, point2->x) - 1;
|
|
draw_area.y1 = point1->y - w_half1;
|
|
draw_area.y2 = point1->y + w_half0;
|
|
|
|
/*If there is no mask then simply draw a rectangle*/
|
|
if(simple_mode) {
|
|
lv_blend_fill(clip, &draw_area,
|
|
dsc->color, NULL, LV_DRAW_MASK_RES_FULL_COVER, opa,
|
|
LV_BLEND_MODE_NORMAL);
|
|
}
|
|
/*If there other mask apply it*/
|
|
else {
|
|
/* Get clipped fill area which is the real draw area.
|
|
* It is always the same or inside `fill_area` */
|
|
bool is_common;
|
|
is_common = lv_area_intersect(&draw_area, clip, &draw_area);
|
|
if(!is_common) return;
|
|
|
|
/* Now `draw_area` has absolute coordinates.
|
|
* Make it relative to `disp_area` to simplify draw to `disp_buf`*/
|
|
draw_area.x1 -= disp_area->x1;
|
|
draw_area.y1 -= disp_area->y1;
|
|
draw_area.x2 -= disp_area->x1;
|
|
draw_area.y2 -= disp_area->y1;
|
|
|
|
int32_t draw_area_w = lv_area_get_width(&draw_area);
|
|
|
|
lv_area_t fill_area;
|
|
fill_area.x1 = draw_area.x1 + disp_area->x1;
|
|
fill_area.x2 = draw_area.x2 + disp_area->x1;
|
|
fill_area.y1 = draw_area.y1 + disp_area->y1;
|
|
fill_area.y2 = fill_area.y1;
|
|
|
|
lv_style_int_t dash_start = 0;
|
|
if(dashed) {
|
|
dash_start = (vdb->area.x1 + draw_area.x1) % (dsc->dash_gap + dsc->dash_width);
|
|
}
|
|
|
|
lv_opa_t * mask_buf = lv_mem_buf_get(draw_area_w);
|
|
int32_t h;
|
|
for(h = draw_area.y1; h <= draw_area.y2; h++) {
|
|
lv_memset_ff(mask_buf, draw_area_w);
|
|
lv_draw_mask_res_t mask_res = lv_draw_mask_apply(mask_buf, vdb->area.x1 + draw_area.x1, vdb->area.y1 + h, draw_area_w);
|
|
|
|
if(dashed) {
|
|
if(mask_res != LV_DRAW_MASK_RES_FULL_TRANSP) {
|
|
lv_style_int_t dash_cnt = dash_start;
|
|
uint32_t i;
|
|
for(i = 0; i < draw_area_w; i++, dash_cnt++) {
|
|
if(dash_cnt <= dsc->dash_width) {
|
|
int16_t diff = dsc->dash_width - dash_cnt;
|
|
i += diff;
|
|
dash_cnt += diff;
|
|
}
|
|
else if(dash_cnt >= dsc->dash_gap + dsc->dash_width) {
|
|
dash_cnt = 0;
|
|
}
|
|
else {
|
|
mask_buf[i] = 0x00;
|
|
}
|
|
}
|
|
|
|
mask_res = LV_DRAW_MASK_RES_CHANGED;
|
|
}
|
|
}
|
|
|
|
lv_blend_fill(clip, &fill_area,
|
|
dsc->color, mask_buf, mask_res, dsc->opa,
|
|
dsc->blend_mode);
|
|
|
|
fill_area.y1++;
|
|
fill_area.y2++;
|
|
}
|
|
lv_mem_buf_release(mask_buf);
|
|
}
|
|
}
|
|
|
|
|
|
static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc)
|
|
{
|
|
lv_opa_t opa = dsc->opa;
|
|
|
|
lv_disp_t * disp = lv_refr_get_disp_refreshing();
|
|
lv_disp_buf_t * vdb = lv_disp_get_buf(disp);
|
|
|
|
const lv_area_t * disp_area = &vdb->area;
|
|
|
|
int32_t w = dsc->width - 1;
|
|
int32_t w_half0 = w >> 1;
|
|
int32_t w_half1 = w_half0 + (w & 0x1); /*Compensate rounding error*/
|
|
|
|
bool dashed = dsc->dash_gap && dsc->dash_width ? true : false;
|
|
|
|
bool simple_mode = true;
|
|
if(lv_draw_mask_get_cnt()) simple_mode = false;
|
|
else if(dashed) simple_mode = false;
|
|
|
|
lv_area_t draw_area;
|
|
draw_area.x1 = point1->x - w_half1;
|
|
draw_area.x2 = point1->x + w_half0;
|
|
draw_area.y1 = LV_MATH_MIN(point1->y, point2->y);
|
|
draw_area.y2 = LV_MATH_MAX(point1->y, point2->y) - 1;
|
|
|
|
/*If there is no mask then simply draw a rectangle*/
|
|
if(simple_mode) {
|
|
lv_blend_fill(clip, &draw_area,
|
|
dsc->color, NULL, LV_DRAW_MASK_RES_FULL_COVER, opa,
|
|
dsc->blend_mode);
|
|
}
|
|
/*If there other mask apply it*/
|
|
else {
|
|
/* Get clipped fill area which is the real draw area.
|
|
* It is always the same or inside `fill_area` */
|
|
bool is_common;
|
|
is_common = lv_area_intersect(&draw_area, clip, &draw_area);
|
|
if(!is_common) return;
|
|
|
|
/* Now `draw_area` has absolute coordinates.
|
|
* Make it relative to `disp_area` to simplify draw to `disp_buf`*/
|
|
draw_area.x1 -= vdb->area.x1;
|
|
draw_area.y1 -= vdb->area.y1;
|
|
draw_area.x2 -= vdb->area.x1;
|
|
draw_area.y2 -= vdb->area.y1;
|
|
|
|
int32_t draw_area_w = lv_area_get_width(&draw_area);
|
|
|
|
lv_area_t fill_area;
|
|
fill_area.x1 = draw_area.x1 + disp_area->x1;
|
|
fill_area.x2 = draw_area.x2 + disp_area->x1;
|
|
fill_area.y1 = draw_area.y1 + disp_area->y1;
|
|
fill_area.y2 = fill_area.y1;
|
|
|
|
lv_opa_t * mask_buf = lv_mem_buf_get(draw_area_w);
|
|
|
|
lv_style_int_t dash_start = 0;
|
|
if(dashed) {
|
|
dash_start = (vdb->area.x1 + draw_area.x1) % (dsc->dash_gap + dsc->dash_width);
|
|
}
|
|
|
|
lv_style_int_t dash_cnt = dash_start;
|
|
|
|
int32_t h;
|
|
for(h = draw_area.y1; h <= draw_area.y2; h++) {
|
|
lv_memset_ff(mask_buf, draw_area_w);
|
|
lv_draw_mask_res_t mask_res = lv_draw_mask_apply(mask_buf, vdb->area.x1 + draw_area.x1, vdb->area.y1 + h, draw_area_w);
|
|
|
|
if(dashed) {
|
|
if(mask_res != LV_DRAW_MASK_RES_FULL_TRANSP) {
|
|
if(dash_cnt > dsc->dash_width) {
|
|
mask_res = LV_DRAW_MASK_RES_FULL_TRANSP;
|
|
}
|
|
|
|
if(dash_cnt >= dsc->dash_gap + dsc->dash_width) {
|
|
dash_cnt = 0;
|
|
}
|
|
}
|
|
dash_cnt ++;
|
|
}
|
|
|
|
lv_blend_fill(clip, &fill_area,
|
|
dsc->color, mask_buf, mask_res, dsc->opa,
|
|
LV_BLEND_MODE_NORMAL);
|
|
|
|
fill_area.y1++;
|
|
fill_area.y2++;
|
|
}
|
|
lv_mem_buf_release(mask_buf);
|
|
}
|
|
}
|
|
|
|
|
|
static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
|
|
lv_draw_line_dsc_t * dsc)
|
|
{
|
|
lv_opa_t opa = dsc->opa;
|
|
|
|
/*Keep the great y in p1*/
|
|
lv_point_t p1;
|
|
lv_point_t p2;
|
|
if(point1->y < point2->y) {
|
|
p1.y = point1->y;
|
|
p2.y = point2->y;
|
|
p1.x = point1->x;
|
|
p2.x = point2->x;
|
|
}
|
|
else {
|
|
p1.y = point2->y;
|
|
p2.y = point1->y;
|
|
p1.x = point2->x;
|
|
p2.x = point1->x;
|
|
}
|
|
|
|
int32_t xdiff = p2.x - p1.x;
|
|
int32_t ydiff = p2.y - p1.y;
|
|
bool flat = LV_MATH_ABS(xdiff) > LV_MATH_ABS(ydiff) ? true : false;
|
|
|
|
static const uint8_t wcorr[] = {
|
|
128, 128, 128, 129, 129, 130, 130, 131,
|
|
132, 133, 134, 135, 137, 138, 140, 141,
|
|
143, 145, 147, 149, 151, 153, 155, 158,
|
|
160, 162, 165, 167, 170, 173, 175, 178,
|
|
181,
|
|
};
|
|
|
|
int32_t w = dsc->width;
|
|
int32_t wcorr_i = 0;
|
|
if(flat) wcorr_i = (LV_MATH_ABS(ydiff) << 5) / LV_MATH_ABS(xdiff);
|
|
else wcorr_i = (LV_MATH_ABS(xdiff) << 5) / LV_MATH_ABS(ydiff);
|
|
|
|
w = (w * wcorr[wcorr_i] + 63) >> 7; /*+ 63 for rounding*/
|
|
int32_t w_half0 = w >> 1;
|
|
int32_t w_half1 = w_half0 + (w & 0x1); /*Compensate rounding error*/
|
|
|
|
lv_area_t draw_area;
|
|
draw_area.x1 = LV_MATH_MIN(p1.x, p2.x) - w;
|
|
draw_area.x2 = LV_MATH_MAX(p1.x, p2.x) + w;
|
|
draw_area.y1 = LV_MATH_MIN(p1.y, p2.y) - w;
|
|
draw_area.y2 = LV_MATH_MAX(p1.y, p2.y) + w;
|
|
|
|
/* Get the union of `coords` and `clip`*/
|
|
/* `clip` is already truncated to the `vdb` size
|
|
* in 'lv_refr_area' function */
|
|
bool is_common = lv_area_intersect(&draw_area, &draw_area, clip);
|
|
if(is_common == false) return;
|
|
|
|
lv_draw_mask_line_param_t mask_left_param;
|
|
lv_draw_mask_line_param_t mask_right_param;
|
|
lv_draw_mask_line_param_t mask_top_param;
|
|
lv_draw_mask_line_param_t mask_bottom_param;
|
|
|
|
if(flat) {
|
|
if(xdiff > 0) {
|
|
lv_draw_mask_line_points_init(&mask_left_param, p1.x, p1.y - w_half0, p2.x, p2.y - w_half0,
|
|
LV_DRAW_MASK_LINE_SIDE_LEFT);
|
|
lv_draw_mask_line_points_init(&mask_right_param, p1.x, p1.y + w_half1, p2.x, p2.y + w_half1,
|
|
LV_DRAW_MASK_LINE_SIDE_RIGHT);
|
|
}
|
|
else {
|
|
lv_draw_mask_line_points_init(&mask_left_param, p1.x, p1.y + w_half1, p2.x, p2.y + w_half1,
|
|
LV_DRAW_MASK_LINE_SIDE_LEFT);
|
|
lv_draw_mask_line_points_init(&mask_right_param, p1.x, p1.y - w_half0, p2.x, p2.y - w_half0,
|
|
LV_DRAW_MASK_LINE_SIDE_RIGHT);
|
|
}
|
|
}
|
|
else {
|
|
lv_draw_mask_line_points_init(&mask_left_param, p1.x + w_half1, p1.y, p2.x + w_half1, p2.y,
|
|
LV_DRAW_MASK_LINE_SIDE_LEFT);
|
|
lv_draw_mask_line_points_init(&mask_right_param, p1.x - w_half0, p1.y, p2.x - w_half0, p2.y,
|
|
LV_DRAW_MASK_LINE_SIDE_RIGHT);
|
|
}
|
|
|
|
/*Use the normal vector for the endings*/
|
|
lv_draw_mask_line_points_init(&mask_top_param, p1.x, p1.y, p1.x - ydiff, p1.y + xdiff, LV_DRAW_MASK_LINE_SIDE_BOTTOM);
|
|
lv_draw_mask_line_points_init(&mask_bottom_param, p2.x, p2.y, p2.x - ydiff, p2.y + xdiff, LV_DRAW_MASK_LINE_SIDE_TOP);
|
|
|
|
int16_t mask_left_id = lv_draw_mask_add(&mask_left_param, NULL);
|
|
int16_t mask_right_id = lv_draw_mask_add(&mask_right_param, NULL);
|
|
int16_t mask_top_id = LV_MASK_ID_INV;
|
|
int16_t mask_bottom_id = LV_MASK_ID_INV;
|
|
|
|
if(!dsc->raw_end) {
|
|
mask_top_id = lv_draw_mask_add(&mask_top_param, NULL);
|
|
mask_bottom_id = lv_draw_mask_add(&mask_bottom_param, NULL);
|
|
}
|
|
|
|
lv_disp_t * disp = lv_refr_get_disp_refreshing();
|
|
lv_disp_buf_t * vdb = lv_disp_get_buf(disp);
|
|
|
|
const lv_area_t * disp_area = &vdb->area;
|
|
|
|
/*Store the coordinates of the `draw_a` relative to the VDB */
|
|
draw_area.x1 -= disp_area->x1;
|
|
draw_area.y1 -= disp_area->y1;
|
|
draw_area.x2 -= disp_area->x1;
|
|
draw_area.y2 -= disp_area->y1;
|
|
|
|
/* The real draw area is around the line.
|
|
* It's easy to calculate with steep lines, but the area can be very wide with very flat lines.
|
|
* So deal with it only with steep lines. */
|
|
int32_t draw_area_w = lv_area_get_width(&draw_area);
|
|
|
|
/*Draw the background line by line*/
|
|
int32_t h;
|
|
size_t mask_buf_size = LV_MATH_MIN(lv_area_get_size(&draw_area), LV_HOR_RES_MAX);
|
|
lv_opa_t * mask_buf = lv_mem_buf_get(mask_buf_size);
|
|
|
|
lv_area_t fill_area;
|
|
fill_area.x1 = draw_area.x1 + disp_area->x1;
|
|
fill_area.x2 = draw_area.x2 + disp_area->x1;
|
|
fill_area.y1 = draw_area.y1 + disp_area->y1;
|
|
fill_area.y2 = fill_area.y1;
|
|
|
|
int32_t x = vdb->area.x1 + draw_area.x1;
|
|
|
|
uint32_t mask_p = 0;
|
|
|
|
lv_memset_ff(mask_buf, mask_buf_size);
|
|
/*Fill the first row with 'color'*/
|
|
for(h = draw_area.y1 + disp_area->y1; h <= draw_area.y2 + disp_area->y1; h++) {
|
|
|
|
lv_draw_mask_res_t mask_res = lv_draw_mask_apply(&mask_buf[mask_p], x, h, draw_area_w);
|
|
if(mask_res == LV_DRAW_MASK_RES_FULL_TRANSP) {
|
|
lv_memset_00(&mask_buf[mask_p], draw_area_w);
|
|
}
|
|
|
|
mask_p += draw_area_w;
|
|
if((uint32_t) mask_p + draw_area_w < mask_buf_size) {
|
|
fill_area.y2 ++;
|
|
}
|
|
else {
|
|
lv_blend_fill(&fill_area, clip,
|
|
dsc->color, mask_buf, LV_DRAW_MASK_RES_CHANGED, dsc->opa,
|
|
dsc->blend_mode);
|
|
|
|
fill_area.y1 = fill_area.y2 + 1;
|
|
fill_area.y2 = fill_area.y1;
|
|
mask_p = 0;
|
|
lv_memset_ff(mask_buf, mask_buf_size);
|
|
}
|
|
}
|
|
|
|
/*Flush the last part*/
|
|
if(fill_area.y1 != fill_area.y2) {
|
|
fill_area.y2--;
|
|
lv_blend_fill( &fill_area, clip,
|
|
dsc->color, mask_buf, LV_DRAW_MASK_RES_CHANGED, dsc->opa,
|
|
dsc->blend_mode);
|
|
|
|
}
|
|
|
|
lv_mem_buf_release(mask_buf);
|
|
|
|
lv_draw_mask_remove_id(mask_left_id);
|
|
lv_draw_mask_remove_id(mask_right_id);
|
|
lv_draw_mask_remove_id(mask_top_id);
|
|
lv_draw_mask_remove_id(mask_bottom_id);
|
|
}
|