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hekate/bdk/libs/lvgl/lv_draw/lv_draw_rect.c

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[Nyx] Introducing hekate GUI, named Nyx! Version 0.8.0. Expect dragons!
2019-06-30 01:03:00 +00:00
/**
* @file lv_draw_rect.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_draw_rect.h"
#include "../lv_misc/lv_circ.h"
#include "../lv_misc/lv_math.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 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
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_draw_rect_main_mid(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
static void lv_draw_rect_main_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
static void lv_draw_rect_border_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
static void lv_draw_rect_border_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
#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, lv_opa_t opa_scale);
static void lv_draw_shadow_full(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
static void lv_draw_shadow_bottom(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale);
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
static lv_opa_t antialias_get_opa_circ(lv_coord_t seg, lv_coord_t px_id, lv_opa_t opa);
#endif
/**********************
* STATIC VARIABLES
**********************/
/**********************
* 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
* @param opa_scale scale down all opacities by the factor
*/
void lv_draw_rect(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
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, opa_scale);
}
#endif
if(style->body.empty == 0 && style->body.opa >= LV_OPA_MIN) {
lv_draw_rect_main_mid(coords, mask, style, opa_scale);
if(style->body.radius != 0) {
lv_draw_rect_main_corner(coords, mask, style, opa_scale);
}
}
if(style->body.border.width != 0 && style->body.border.part != LV_BORDER_NONE && style->body.border.opa >= LV_OPA_MIN) {
lv_draw_rect_border_straight(coords, mask, style, opa_scale);
if(style->body.radius != 0) {
lv_draw_rect_border_corner(coords, mask, style, opa_scale);
}
}
}
/**********************
* 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
* @param opa_scale scale down all opacities by the factor
*/
static void lv_draw_rect_main_mid(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
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_coord_t height = lv_area_get_height(coords);
lv_coord_t width = lv_area_get_width(coords);
lv_opa_t opa = opa_scale == LV_OPA_COVER ? style->body.opa : (uint16_t)((uint16_t) style->body.opa * opa_scale) >> 8;
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
* @param opa_scale scale down all opacities by the factor
*/
static void lv_draw_rect_main_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
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 = opa_scale == LV_OPA_COVER ? style->body.opa : (uint16_t)((uint16_t) style->body.opa * opa_scale) >> 8;
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, opa);
} else {
aa_opa = opa - lv_draw_aa_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_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 - lv_draw_aa_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 = 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
* @param opa_scale scale down all opacities by the factor
*/
static void lv_draw_rect_border_straight(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
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 = opa_scale == LV_OPA_COVER ? style->body.border.opa : (uint16_t)((uint16_t) style->body.border.opa * opa_scale) >> 8;
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;
}
/*If radius == 0 is a special case*/
if(style->body.radius == 0) {
/*Left top corner*/
if(part & LV_BORDER_TOP) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x2;
work_area.y1 = coords->y1;
work_area.y2 = coords->y1 + bwidth;
fill_fp(&work_area, mask, color, opa);
}
/*Right top corner*/
if(part & LV_BORDER_RIGHT) {
work_area.x1 = coords->x2 - bwidth;
work_area.x2 = coords->x2;
work_area.y1 = coords->y1 + (part & LV_BORDER_TOP ? bwidth + 1 : 0);
work_area.y2 = coords->y2 - (part & LV_BORDER_BOTTOM ? bwidth + 1 : 0);
fill_fp(&work_area, mask, color, opa);
}
/*Left bottom corner*/
if(part & LV_BORDER_LEFT) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x1 + bwidth;
work_area.y1 = coords->y1 + (part & LV_BORDER_TOP ? bwidth + 1 : 0);
work_area.y2 = coords->y2 - (part & LV_BORDER_BOTTOM ? bwidth + 1 : 0);
fill_fp(&work_area, mask, color, opa);
}
/*Right bottom corner*/
if(part & LV_BORDER_BOTTOM) {
work_area.x1 = coords->x1;
work_area.x2 = coords->x2;
work_area.y1 = coords->y2 - bwidth;
work_area.y2 = coords->y2;
fill_fp(&work_area, mask, color, opa);
}
return;
}
/* 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 style pointer to a style
* @param opa_scale scale down all opacities by the factor
*/
static void lv_draw_rect_border_corner(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
uint16_t radius = style->body.radius ;
uint16_t bwidth = style->body.border.width;
lv_color_t color = style->body.border.color;
lv_border_part_t part = style->body.border.part;
lv_opa_t opa = opa_scale == LV_OPA_COVER ? style->body.border.opa : (uint16_t)((uint16_t) style->body.border.opa * opa_scale) >> 8;
/*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, opa);
} else {
aa_opa = opa - lv_draw_aa_get_opa(seg_size, i, 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 = opa - antialias_get_opa_circ(seg_size, i, opa);
} else {
aa_opa = lv_draw_aa_get_opa(seg_size, i, 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 = opa - lv_draw_aa_get_opa(seg_size, i, 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 = 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 = lv_draw_aa_get_opa(seg_size, i, 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)
* @param opa_scale scale down all opacities by the factor
*/
static void lv_draw_shadow(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
/* 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, opa_scale);
} else if(style->body.shadow.type == LV_SHADOW_BOTTOM) {
lv_draw_shadow_bottom(coords, mask, style, opa_scale);
}
}
static void lv_draw_shadow_full(const lv_area_t * coords, const lv_area_t * mask, const lv_style_t * style, lv_opa_t opa_scale)
{
/* KNOWN ISSUE
* The algorithm calculates the shadow only above the middle point of the radius (speaking about the left top corner).
* It causes an error because it doesn't consider how long the straight edge is which effects the value of bottom of the corner shadow.
* In addition the straight shadow is drawn from the middles point of the radius however
* the ends of the straight parts still should be effected by the corner shadow.
* It also causes an issue in opacity. A smaller radius means smaller average shadow opacity.
* The solution should be to start `line` from `- swidth` and handle if the straight part is short (or zero) and the value is taken from
* the other corner. `col` also should start from `- swidth`
*/
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;
#if LV_COMPILER_VLA_SUPPORTED
lv_coord_t curve_x[radius + swidth + 1]; /*Stores the 'x' coordinates of a quarter circle.*/
#else
# if LV_HOR_RES > LV_VER_RES
lv_coord_t curve_x[LV_HOR_RES];
# else
lv_coord_t curve_x[LV_VER_RES];
# endif
#endif
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;
#if LV_COMPILER_VLA_SUPPORTED
uint32_t line_1d_blur[filter_width];
#else
# if LV_HOR_RES > LV_VER_RES
uint32_t line_1d_blur[LV_HOR_RES];
# else
uint32_t line_1d_blur[LV_VER_RES];
# endif
#endif
/*1D Blur horizontally*/
lv_opa_t opa = opa_scale == LV_OPA_COVER ? style->body.opa : (uint16_t)((uint16_t) style->body.opa * opa_scale) >> 8;
for(line = 0; line < filter_width; line++) {
line_1d_blur[line] = (uint32_t)((uint32_t)(filter_width - line) * (opa * 2) << SHADOW_OPA_EXTRA_PRECISION) / (filter_width * filter_width);
}
uint16_t col;
#if LV_COMPILER_VLA_SUPPORTED
lv_opa_t line_2d_blur[radius + swidth + 1];
#else
# if LV_HOR_RES > LV_VER_RES
lv_opa_t line_2d_blur[LV_HOR_RES];
# else
lv_opa_t line_2d_blur[LV_VER_RES];
# endif
#endif
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 = 0; line <= radius + swidth; line++) { /*Check all rows and make the 1D blur to 2D*/
line_ready = false;
for(col = 0; col <= radius + swidth; 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 blurred 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) {
col++; /*To make this line to the last one ( drawing will go to '< col')*/
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_lt.x < ofs_lt.x && point_lt.y < ofs_lt.y) {
px_fp(point_lt.x, point_lt.y, mask, style->body.shadow.color, line_2d_blur[d]);
}
if(point_lb.x < ofs_lb.x && point_lb.y > ofs_lb.y) {
px_fp(point_lb.x, point_lb.y, mask, style->body.shadow.color, line_2d_blur[d]);
}
if(point_rt.x > ofs_rt.x && point_rt.y < ofs_rt.y) {
px_fp(point_rt.x, point_rt.y, mask, style->body.shadow.color, line_2d_blur[d]);
}
if(point_rb.x > ofs_rb.x && point_rb.y > ofs_rb.y) {
px_fp(point_rb.x, point_rb.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 == 0) 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_opa_t opa_scale)
{
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;
#if LV_COMPILER_VLA_SUPPORTED
lv_coord_t curve_x[radius + 1]; /*Stores the 'x' coordinates of a quarter circle.*/
#else
# if LV_HOR_RES > LV_VER_RES
lv_coord_t curve_x[LV_HOR_RES];
# else
lv_coord_t curve_x[LV_VER_RES];
# endif
#endif
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;
#if LV_COMPILER_VLA_SUPPORTED
lv_opa_t line_1d_blur[swidth];
#else
# if LV_HOR_RES > LV_VER_RES
lv_opa_t line_1d_blur[LV_HOR_RES];
# else
lv_opa_t line_1d_blur[LV_VER_RES];
# endif
#endif
lv_opa_t opa = opa_scale == LV_OPA_COVER ? style->body.opa : (uint16_t)((uint16_t) style->body.opa * opa_scale) >> 8;
for(col = 0; col < swidth; col++) {
line_1d_blur[col] = (uint32_t)((uint32_t)(swidth - col) * opa / 2) / (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 - col ;
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];
lv_opa_t px_opa;
int16_t diff = col == 0 ? 0 : curve_x[col - 1] - curve_x[col];
uint16_t d;
for(d = 0; d < swidth; d++) {
/*When stepping a pixel in y calculate the average with the pixel from the prev. column to make a blur */
if(diff == 0) {
px_opa = line_1d_blur[d];
} else {
px_opa = (uint16_t)((uint16_t)line_1d_blur[d] + line_1d_blur[d - diff]) >> 1;
}
px_fp(point_l.x, point_l.y, mask, style->body.shadow.color, px_opa);
point_l.y ++;
/*Don't overdraw the pixel on the middle*/
if(point_r.x > ofs_l.x) {
px_fp(point_r.x, point_r.y, mask, style->body.shadow.color, px_opa);
}
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);
radius += LV_ANTIALIAS;
lv_area_t right_area;
right_area.x1 = coords->x2 + 1 - LV_ANTIALIAS;
right_area.y1 = coords->y1 + radius + LV_ANTIALIAS;
right_area.x2 = right_area.x1;
right_area.y2 = coords->y2 - radius - LV_ANTIALIAS;
lv_area_t left_area;
left_area.x1 = coords->x1 - 1 + LV_ANTIALIAS;
left_area.y1 = coords->y1 + radius + LV_ANTIALIAS;
left_area.x2 = left_area.x1;
left_area.y2 = coords->y2 - radius - LV_ANTIALIAS;
lv_area_t top_area;
top_area.x1 = coords->x1 + radius + LV_ANTIALIAS;
top_area.y1 = coords->y1 - 1 + LV_ANTIALIAS;
top_area.x2 = coords->x2 - radius - LV_ANTIALIAS;
top_area.y2 = top_area.y1;
lv_area_t bottom_area;
bottom_area.x1 = coords->x1 + radius + LV_ANTIALIAS;
bottom_area.y1 = coords->y2 + 1 - LV_ANTIALIAS;
bottom_area.x2 = coords->x2 - radius - LV_ANTIALIAS;
bottom_area.y2 = bottom_area.y1;
lv_opa_t opa_act;
int16_t d;
for(d = 1 /*+ LV_ANTIALIAS*/; d <= swidth/* - LV_ANTIALIAS*/; 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
/**
* 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 length of the line segment
* @param px_id index of pixel on the line segment
* @param line_opa opacity of the lien (it will be the max opacity)
* @return the desired opacity of the pixel
*/
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
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