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hekate/bdk/libs/lvgl/lv_objx/lv_chart.c
CTCaer 185526d134 Introducing Bootloader Development Kit (BDK) 
BDK will allow developers to use the full collection of drivers,
with limited editing, if any, for making payloads for Nintendo Switch.

Using a single source for everything will also help decoupling
Switch specific code and easily port it to other Tegra X1/X1+ platforms.
And maybe even to lower targets.

Everything is now centrilized into bdk folder.
Every module or project can utilize it by simply including it.

This is just the start and it will continue to improve.
2020-06-14 15:25:21 +03:00

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/**
* @file lv_chart.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_chart.h"
#if USE_LV_CHART != 0
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
/*********************
* DEFINES
*********************/
#define LV_CHART_YMIN_DEF 0
#define LV_CHART_YMAX_DEF 100
#define LV_CHART_HDIV_DEF 3
#define LV_CHART_VDIV_DEF 5
#define LV_CHART_PNUM_DEF 10
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_chart_design(lv_obj_t * chart, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_chart_signal(lv_obj_t * chart, lv_signal_t sign, void * param);
static void lv_chart_draw_div(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_lines(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_points(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_cols(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_vertical_lines(lv_obj_t * chart, const lv_area_t * mask);
/**********************
* STATIC VARIABLES
**********************/
static lv_design_func_t ancestor_design_f;
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a chart background objects
* @param par pointer to an object, it will be the parent of the new chart background
* @param copy pointer to a chart background object, if not NULL then the new object will be copied from it
* @return pointer to the created chart background
*/
lv_obj_t * lv_chart_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("chart create started");
/*Create the ancestor basic object*/
lv_obj_t * new_chart = lv_obj_create(par, copy);
lv_mem_assert(new_chart);
if(new_chart == NULL) return NULL;
/*Allocate the object type specific extended data*/
lv_chart_ext_t * ext = lv_obj_allocate_ext_attr(new_chart, sizeof(lv_chart_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
lv_ll_init(&ext->series_ll, sizeof(lv_chart_series_t));
ext->series.num = 0;
ext->ymin = LV_CHART_YMIN_DEF;
ext->ymax = LV_CHART_YMAX_DEF;
ext->hdiv_cnt = LV_CHART_HDIV_DEF;
ext->vdiv_cnt = LV_CHART_VDIV_DEF;
ext->point_cnt = LV_CHART_PNUM_DEF;
ext->type = LV_CHART_TYPE_LINE;
ext->series.opa = LV_OPA_COVER;
ext->series.dark = LV_OPA_50;
ext->series.width = 2;
if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_func(new_chart);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_chart);
lv_obj_set_signal_func(new_chart, lv_chart_signal);
lv_obj_set_design_func(new_chart, lv_chart_design);
/*Init the new chart background object*/
if(copy == NULL) {
lv_obj_set_size(new_chart, LV_HOR_RES / 3, LV_VER_RES / 3);
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_chart_set_style(new_chart, th->chart);
} else {
lv_chart_set_style(new_chart, &lv_style_pretty);
}
} else {
lv_chart_ext_t * ext_copy = lv_obj_get_ext_attr(copy);
ext->type = ext_copy->type;
ext->ymin = ext_copy->ymin;
ext->ymax = ext_copy->ymax;
ext->hdiv_cnt = ext_copy->hdiv_cnt;
ext->vdiv_cnt = ext_copy->vdiv_cnt;
ext->point_cnt = ext_copy->point_cnt;
ext->series.opa = ext_copy->series.opa;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_chart);
}
LV_LOG_INFO("chart created");
return new_chart;
}
/*======================
* Add/remove functions
*=====================*/
/**
* Allocate and add a data series to the chart
* @param chart pointer to a chart object
* @param color color of the data series
* @return pointer to the allocated data series
*/
lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_chart_series_t * ser = lv_ll_ins_head(&ext->series_ll);
lv_mem_assert(ser);
if(ser == NULL) return NULL;
lv_coord_t def = LV_CHART_POINT_DEF;
if(ser == NULL) return NULL;
ser->color = color;
ser->points = lv_mem_alloc(sizeof(lv_coord_t) * ext->point_cnt);
lv_mem_assert(ser->points);
if(ser->points == NULL) {
lv_ll_rem(&ext->series_ll, ser);
lv_mem_free(ser);
return NULL;
}
ser->start_point = 0;
uint16_t i;
lv_coord_t * p_tmp = ser->points;
for(i = 0; i < ext->point_cnt; i++) {
*p_tmp = def;
p_tmp++;
}
ext->series.num++;
return ser;
}
/**
* Clear the point of a serie
* @param chart pointer to a chart object
* @param serie pointer to the chart's serie to clear
*/
void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * serie)
{
if(chart == NULL || serie == NULL)
return;
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext == NULL) return;
uint32_t i;
for(i = 0; i < ext->point_cnt; i++)
{
serie->points[i] = LV_CHART_POINT_DEF;
}
serie->start_point = 0;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the number of horizontal and vertical division lines
* @param chart pointer to a graph background object
* @param hdiv number of horizontal division lines
* @param vdiv number of vertical division lines
*/
void lv_chart_set_div_line_count(lv_obj_t * chart, uint8_t hdiv, uint8_t vdiv)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->hdiv_cnt == hdiv && ext->vdiv_cnt == vdiv) return;
ext->hdiv_cnt = hdiv;
ext->vdiv_cnt = vdiv;
lv_obj_invalidate(chart);
}
/**
* Set the minimal and maximal y values
* @param chart pointer to a graph background object
* @param ymin y minimum value
* @param ymax y maximum value
*/
void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coord_t ymax)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->ymin == ymin && ext->ymax == ymax) return;
ext->ymin = ymin;
ext->ymax = ymax;
lv_chart_refresh(chart);
}
/**
* Set a new type for a chart
* @param chart pointer to a chart object
* @param type new type of the chart (from 'lv_chart_type_t' enum)
*/
void lv_chart_set_type(lv_obj_t * chart, lv_chart_type_t type)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->type == type) return;
ext->type = type;
lv_chart_refresh(chart);
}
/**
* Set the number of points on a data line on a chart
* @param chart pointer r to chart object
* @param point_cnt new number of points on the data lines
*/
void lv_chart_set_point_count(lv_obj_t * chart, uint16_t point_cnt)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->point_cnt == point_cnt) return;
lv_chart_series_t * ser;
uint16_t point_cnt_old = ext->point_cnt;
uint16_t i;
lv_coord_t def = LV_CHART_POINT_DEF;
if(point_cnt < 1) point_cnt = 1;
LL_READ_BACK(ext->series_ll, ser) {
if(ser->start_point != 0) {
lv_coord_t * new_points = lv_mem_alloc(sizeof(lv_coord_t) * point_cnt);
lv_mem_assert(new_points);
if(new_points == NULL) return;
if(point_cnt >= point_cnt_old) {
for(i = 0; i < point_cnt_old; i++) {
new_points[i] = ser->points[(i + ser->start_point) % point_cnt_old]; /*Copy old contents to new array*/
}
for(i = point_cnt_old; i < point_cnt; i++) {
new_points[i] = def; /*Fill up the rest with default value*/
}
} else {
for(i = 0; i < point_cnt; i++) {
new_points[i] = ser->points[(i + ser->start_point) % point_cnt_old]; /*Copy old contents to new array*/
}
}
/*Switch over pointer from old to new*/
lv_mem_free(ser->points);
ser->points = new_points;
} else {
ser->points = lv_mem_realloc(ser->points, sizeof(lv_coord_t) * point_cnt);
lv_mem_assert(ser->points);
if(ser->points == NULL) return;
/*Initialize the new points*/
if(point_cnt > point_cnt_old) {
for(i = point_cnt_old - 1; i < point_cnt; i++) {
ser->points[i] = def;
}
}
}
ser->start_point = 0;
}
ext->point_cnt = point_cnt;
lv_chart_refresh(chart);
}
/**
* Set the opacity of the data series
* @param chart pointer to a chart object
* @param opa opacity of the data series
*/
void lv_chart_set_series_opa(lv_obj_t * chart, lv_opa_t opa)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.opa == opa) return;
ext->series.opa = opa;
lv_obj_invalidate(chart);
}
/**
* Set the line width or point radius of the data series
* @param chart pointer to a chart object
* @param width the new width
*/
void lv_chart_set_series_width(lv_obj_t * chart, lv_coord_t width)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.width == width) return;
ext->series.width = width;
lv_obj_invalidate(chart);
}
/**
* Set the dark effect on the bottom of the points or columns
* @param chart pointer to a chart object
* @param dark_eff dark effect level (LV_OPA_TRANSP to turn off)
*/
void lv_chart_set_series_darking(lv_obj_t * chart, lv_opa_t dark_eff)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.dark == dark_eff) return;
ext->series.dark = dark_eff;
lv_obj_invalidate(chart);
}
/**
* Initialize all data points with a value
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y the new value for all points
*/
void lv_chart_init_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
for(i = 0; i < ext->point_cnt; i++) {
ser->points[i] = y;
}
ser->start_point = 0;
lv_chart_refresh(chart);
}
/**
* Set the value s of points from an array
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y_array array of 'lv_coord_t' points (with 'points count' elements )
*/
void lv_chart_set_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t * y_array)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
memcpy(ser->points, y_array, ext->point_cnt * (sizeof(lv_coord_t)));
ser->start_point = 0;
lv_chart_refresh(chart);
}
/**
* Shift all data left and set the rightmost data on a data line
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y the new value of the rightmost data
*/
void lv_chart_set_next(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
ser->points[ser->start_point] = y; /*This was the place of the former left most value, after shifting it is the rightmost*/
ser->start_point = (ser->start_point + 1) % ext->point_cnt;
lv_chart_refresh(chart);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the type of a chart
* @param chart pointer to chart object
* @return type of the chart (from 'lv_chart_t' enum)
*/
lv_chart_type_t lv_chart_get_type(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->type;
}
/**
* Get the data point number per data line on chart
* @param chart pointer to chart object
* @return point number on each data line
*/
uint16_t lv_chart_get_point_cnt(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->point_cnt;
}
/**
* Get the opacity of the data series
* @param chart pointer to chart object
* @return the opacity of the data series
*/
lv_opa_t lv_chart_get_series_opa(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.opa;
}
/**
* Get the data series width
* @param chart pointer to chart object
* @return the width the data series (lines or points)
*/
lv_coord_t lv_chart_get_series_width(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.width;
}
/**
* Get the dark effect level on the bottom of the points or columns
* @param chart pointer to chart object
* @return dark effect level (LV_OPA_TRANSP to turn off)
*/
lv_opa_t lv_chart_get_series_darking(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.dark;
}
/*=====================
* Other functions
*====================*/
/**
* Refresh a chart if its data line has changed
* @param chart pointer to chart object
*/
void lv_chart_refresh(lv_obj_t * chart)
{
lv_obj_invalidate(chart);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the chart backgrounds
* @param chart pointer to an object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_chart_design(lv_obj_t * chart, const lv_area_t * mask, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
/*Return false if the object is not covers the mask_p area*/
return ancestor_design_f(chart, mask, mode);
} else if(mode == LV_DESIGN_DRAW_MAIN) {
/*Draw the background*/
lv_draw_rect(&chart->coords, mask, lv_obj_get_style(chart), lv_obj_get_opa_scale(chart));
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_chart_draw_div(chart, mask);
if(ext->type & LV_CHART_TYPE_LINE) lv_chart_draw_lines(chart, mask);
if(ext->type & LV_CHART_TYPE_COLUMN) lv_chart_draw_cols(chart, mask);
if(ext->type & LV_CHART_TYPE_POINT) lv_chart_draw_points(chart, mask);
if(ext->type & LV_CHART_TYPE_VERTICAL_LINE) lv_chart_draw_vertical_lines(chart, mask);
}
return true;
}
/**
* Signal function of the chart background
* @param chart pointer to a chart background object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
static lv_res_t lv_chart_signal(lv_obj_t * chart, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(chart, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_CLEANUP) {
lv_coord_t ** datal;
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
LL_READ(ext->series_ll, datal) {
lv_mem_free(*datal);
}
lv_ll_clear(&ext->series_ll);
} else if(sign == LV_SIGNAL_GET_TYPE) {
lv_obj_type_t * buf = param;
uint8_t i;
for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) { /*Find the last set data*/
if(buf->type[i] == NULL) break;
}
buf->type[i] = "lv_chart";
}
return res;
}
/**
* Draw the division lines on chart background
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_div(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_style_t * style = lv_obj_get_style(chart);
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
uint8_t div_i;
uint8_t div_i_end;
uint8_t div_i_start;
lv_point_t p1;
lv_point_t p2;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
if(ext->hdiv_cnt != 0) {
/*Draw slide lines if no border*/
if(style->body.border.width != 0) {
div_i_start = 1;
div_i_end = ext->hdiv_cnt;
} else {
div_i_start = 0;
div_i_end = ext->hdiv_cnt + 1;
}
p1.x = 0 + x_ofs;
p2.x = w + x_ofs;
for(div_i = div_i_start; div_i <= div_i_end; div_i++) {
p1.y = (int32_t)((int32_t)h * div_i) / (ext->hdiv_cnt + 1);
p1.y += y_ofs;
if(div_i == div_i_start) p1.y += (style->line.width >> 1) + 1; /*The first line might not be visible*/
if(div_i == div_i_end) p1.y -= (style->line.width >> 1) + 1; /*The last line might not be visible*/
p2.y = p1.y;
lv_draw_line(&p1, &p2, mask, style, opa_scale);
}
}
if(ext->vdiv_cnt != 0) {
/*Draw slide lines if no border*/
if(style->body.border.width != 0) {
div_i_start = 1;
div_i_end = ext->vdiv_cnt;
} else {
div_i_start = 0;
div_i_end = ext->vdiv_cnt + 1;
}
p1.y = 0 + y_ofs;
p2.y = h + y_ofs;
for(div_i = div_i_start; div_i <= div_i_end; div_i ++) {
p1.x = (int32_t)((int32_t)w * div_i) / (ext->vdiv_cnt + 1);
p1.x += x_ofs;
if(div_i == div_i_start) p1.x += (style->line.width >> 1) + 1; /*The first line might not be visible*/
if(div_i == div_i_end) p1.x -= (style->line.width >> 1) + 1; /*The last line might not be visible*/
p2.x = p1.x;
lv_draw_line(&p1, &p2, mask, style, opa_scale);
}
}
}
/**
* Draw the data lines as lines on a chart
* @param obj pointer to chart object
*/
static void lv_chart_draw_lines(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_point_t p1;
lv_point_t p2;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_coord_t p_prev;
lv_coord_t p_act;
lv_chart_series_t * ser;
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
lv_style_t style;
lv_style_copy(&style, &lv_style_plain);
style.line.opa = ext->series.opa;
style.line.width = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style.line.color = ser->color;
p1.x = 0 + x_ofs;
p2.x = 0 + x_ofs;
p_prev = ser->start_point;
y_tmp = (int32_t)((int32_t) ser->points[p_prev] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
for(i = 1; i < ext->point_cnt; i ++) {
p1.x = p2.x;
p1.y = p2.y;
p2.x = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
if(ser->points[p_prev] != LV_CHART_POINT_DEF && ser->points[p_act] != LV_CHART_POINT_DEF)
lv_draw_line(&p1, &p2, mask, &style, opa_scale);
p_prev = p_act;
}
}
}
/**
* Draw the data lines as points on a chart
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_points(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_area_t cir_a;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_coord_t p_act;
lv_chart_series_t * ser;
uint8_t series_cnt = 0;
lv_style_t style_point;
lv_style_copy(&style_point, &lv_style_plain);
style_point.body.border.width = 0;
style_point.body.empty = 0;
style_point.body.radius = LV_RADIUS_CIRCLE;
style_point.body.opa = ext->series.opa;
style_point.body.radius = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style_point.body.main_color = ser->color;
style_point.body.grad_color = lv_color_mix(LV_COLOR_BLACK, ser->color, ext->series.dark);
for(i = 0; i < ext->point_cnt; i ++) {
cir_a.x1 = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
cir_a.x2 = cir_a.x1 + style_point.body.radius;
cir_a.x1 -= style_point.body.radius;
p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
cir_a.y1 = h - y_tmp + y_ofs;
cir_a.y2 = cir_a.y1 + style_point.body.radius;
cir_a.y1 -= style_point.body.radius;
if(ser->points[p_act] != LV_CHART_POINT_DEF)
lv_draw_rect(&cir_a, mask, &style_point, lv_obj_get_opa_scale(chart));
}
series_cnt++;
}
}
/**
* Draw the data lines as columns on a chart
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_cols(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_area_t col_a;
lv_area_t col_mask;
bool mask_ret;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
int32_t y_tmp;
lv_chart_series_t * ser;
lv_style_t rects;
lv_coord_t col_w = w / ((ext->series.num + 1) * ext->point_cnt); /* Suppose + 1 series as separator*/
lv_coord_t x_ofs = col_w / 2; /*Shift with a half col.*/
lv_style_copy(&rects, &lv_style_plain);
rects.body.border.width = 0;
rects.body.empty = 0;
rects.body.radius = 0;
rects.body.opa = ext->series.opa;
col_a.y2 = chart->coords.y2;
lv_coord_t x_act;
/*Go through all points*/
for(i = 0; i < ext->point_cnt; i ++) {
x_act = (int32_t)((int32_t) w * i) / ext->point_cnt;
x_act += chart->coords.x1 + x_ofs;
/*Draw the current point of all data line*/
LL_READ_BACK(ext->series_ll, ser) {
rects.body.main_color = ser->color;
rects.body.grad_color = lv_color_mix(LV_COLOR_BLACK, ser->color, ext->series.dark);
col_a.x1 = x_act;
col_a.x2 = col_a.x1 + col_w;
x_act += col_w;
lv_coord_t p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
col_a.y1 = h - y_tmp + chart->coords.y1;
mask_ret = lv_area_intersect(&col_mask, mask, &col_a);
if(mask_ret != false && ser->points[p_act] != LV_CHART_POINT_DEF) {
lv_draw_rect(&chart->coords, &col_mask, &rects, lv_obj_get_opa_scale(chart));
}
}
}
}
/**
* Draw the data lines as vertical lines on a chart if there is only 1px between point
* @param obj pointer to chart object
*/
static void lv_chart_draw_vertical_lines(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_coord_t w = lv_obj_get_width(chart);
/*Vertical lines works only if the width == point count. Else use the normal line type*/
if(ext->point_cnt != w) {
lv_chart_draw_lines(chart, mask);
return;
}
uint16_t i;
lv_point_t p1;
lv_point_t p2;
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_chart_series_t * ser;
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
lv_style_t style;
lv_style_copy(&style, &lv_style_plain);
style.line.opa = ext->series.opa;
style.line.width = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style.line.color = ser->color;
p1.x = 0 + x_ofs;
p2.x = 0 + x_ofs;
y_tmp = (int32_t)((int32_t) ser->points[0] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
p1.y = p2.y;
for(i = 0; i < ext->point_cnt; i++)
{
y_tmp = (int32_t)((int32_t) ser->points[i] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
if(p1.y == p2.y)
{
p2.x++;
}
if(ser->points[i] != LV_CHART_POINT_DEF) {
lv_draw_line(&p1, &p2, mask, &style, opa_scale);
}
p2.x = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
p1.x = p2.x;
p1.y = p2.y;
}
}
}
#endif
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