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0cc1e99ddf8768079df5a7d0be3265c54d864174
lvgl/src/draw/lv_draw_mask.c
Gabor Kiss-Vamosi 0cc1e99ddf remove the lv_ prefix from the directories in the src folder
2021-03-16 20:36:27 +01:00

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/**
* @file lv_mask.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_draw_mask.h"
#if LV_DRAW_COMPLEX
#include "../misc/lv_math.h"
#include "../misc/lv_log.h"
#include "../misc/lv_assert.h"
#include "../misc/lv_gc.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_line(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_line_param_t * param);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_radius(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_radius_param_t * param);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_angle(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_angle_param_t * param);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_fade(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_fade_param_t * param);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_map(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_map_param_t * param);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_flat(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
lv_coord_t len,
lv_draw_mask_line_param_t * p);
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_steep(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
lv_coord_t len,
lv_draw_mask_line_param_t * p);
LV_ATTRIBUTE_FAST_MEM static inline lv_opa_t mask_mix(lv_opa_t mask_act, lv_opa_t mask_new);
LV_ATTRIBUTE_FAST_MEM static inline void sqrt_approx(lv_sqrt_res_t * q, lv_sqrt_res_t * ref, uint32_t x);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Add a draw mask. Everything drawn after it (until removing the mask) will be affected by the mask.
* @param param an initialized mask parameter. Only the pointer is saved.
* @param custom_id a custom pointer to identify the mask. Used in `lv_draw_mask_remove_custom`.
* @return the an integer, the ID of the mask. Can be used in `lv_draw_mask_remove_id`.
*/
int16_t lv_draw_mask_add(void * param, void * custom_id)
{
/*Look for a free entry*/
uint8_t i;
for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
if(LV_GC_ROOT(_lv_draw_mask_list[i]).param == NULL) break;
}
if(i >= _LV_MASK_MAX_NUM) {
LV_LOG_WARN("lv_mask_add: no place to add the mask");
return LV_MASK_ID_INV;
}
LV_GC_ROOT(_lv_draw_mask_list[i]).param = param;
LV_GC_ROOT(_lv_draw_mask_list[i]).custom_id = custom_id;
return i;
}
/**
* Apply the added buffers on a line. Used internally by the library's drawing routines.
* @param mask_buf store the result mask here. Has to be `len` byte long. Should be initialized with `0xFF`.
* @param abs_x absolute X coordinate where the line to calculate start
* @param abs_y absolute Y coordinate where the line to calculate start
* @param len length of the line to calculate (in pixel count)
* @return One of these values:
* - `LV_DRAW_MASK_RES_FULL_TRANSP`: the whole line is transparent. `mask_buf` is not set to zero
* - `LV_DRAW_MASK_RES_FULL_COVER`: the whole line is fully visible. `mask_buf` is unchanged
* - `LV_DRAW_MASK_RES_CHANGED`: `mask_buf` has changed, it shows the desired opacity of each pixel in the given line
*/
LV_ATTRIBUTE_FAST_MEM lv_draw_mask_res_t lv_draw_mask_apply(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
lv_coord_t len)
{
bool changed = false;
lv_draw_mask_common_dsc_t * dsc;
_lv_draw_mask_saved_t * m = LV_GC_ROOT(_lv_draw_mask_list);
while(m->param) {
dsc = m->param;
lv_draw_mask_res_t res = LV_DRAW_MASK_RES_FULL_COVER;
res = dsc->cb(mask_buf, abs_x, abs_y, len, (void *)m->param);
if(res == LV_DRAW_MASK_RES_TRANSP) return LV_DRAW_MASK_RES_TRANSP;
else if(res == LV_DRAW_MASK_RES_CHANGED) changed = true;
m++;
}
return changed ? LV_DRAW_MASK_RES_CHANGED : LV_DRAW_MASK_RES_FULL_COVER;
}
/**
* Remove a mask with a given ID
* @param id the ID of the mask. Returned by `lv_draw_mask_add`
* @return the parameter of the removed mask.
* If more masks have `custom_id` ID then the last mask's parameter will be returned
*/
void * lv_draw_mask_remove_id(int16_t id)
{
void * p = NULL;
if(id != LV_MASK_ID_INV) {
p = LV_GC_ROOT(_lv_draw_mask_list[id]).param;
LV_GC_ROOT(_lv_draw_mask_list[id]).param = NULL;
LV_GC_ROOT(_lv_draw_mask_list[id]).custom_id = NULL;
}
return p;
}
/**
* Remove all mask with a given custom ID
* @param custom_id a pointer used in `lv_draw_mask_add`
* @return return the parameter of the removed mask.
* If more masks have `custom_id` ID then the last mask's parameter will be returned
*/
void * lv_draw_mask_remove_custom(void * custom_id)
{
void * p = NULL;
uint8_t i;
for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
if(LV_GC_ROOT(_lv_draw_mask_list[i]).custom_id == custom_id) {
p = LV_GC_ROOT(_lv_draw_mask_list[i]).param;
LV_GC_ROOT(_lv_draw_mask_list[i]).param = NULL;
LV_GC_ROOT(_lv_draw_mask_list[i]).custom_id = NULL;
}
}
return p;
}
/**
* Count the currently added masks
* @return number of active masks
*/
LV_ATTRIBUTE_FAST_MEM uint8_t lv_draw_mask_get_cnt(void)
{
uint8_t cnt = 0;
uint8_t i;
for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
if(LV_GC_ROOT(_lv_draw_mask_list[i]).param) cnt++;
}
return cnt;
}
/**
*Initialize a line mask from two points.
* @param param pointer to a `lv_draw_mask_param_t` to initialize
* @param p1x X coordinate of the first point of the line
* @param p1y Y coordinate of the first point of the line
* @param p2x X coordinate of the second point of the line
* @param p2y y coordinate of the second point of the line
* @param side and element of `lv_draw_mask_line_side_t` to describe which side to keep.
* With `LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT` and horizontal line all pixels are kept
* With `LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM` and vertical line all pixels are kept
*/
void lv_draw_mask_line_points_init(lv_draw_mask_line_param_t * param, lv_coord_t p1x, lv_coord_t p1y, lv_coord_t p2x,
lv_coord_t p2y, lv_draw_mask_line_side_t side)
{
lv_memset_00(param, sizeof(lv_draw_mask_line_param_t));
if(p1y == p2y && side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) {
p1y--;
p2y--;
}
if(p1y > p2y) {
lv_coord_t t;
t = p2x;
p2x = p1x;
p1x = t;
t = p2y;
p2y = p1y;
p1y = t;
}
param->cfg.p1.x = p1x;
param->cfg.p1.y = p1y;
param->cfg.p2.x = p2x;
param->cfg.p2.y = p2y;
param->cfg.side = side;
param->origo.x = p1x;
param->origo.y = p1y;
param->flat = (LV_ABS(p2x - p1x) > LV_ABS(p2y - p1y)) ? 1 : 0;
param->yx_steep = 0;
param->xy_steep = 0;
param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_line;
param->dsc.type = LV_DRAW_MASK_TYPE_LINE;
int32_t dx = p2x - p1x;
int32_t dy = p2y - p1y;
if(param->flat) {
/*Normalize the steep. Delta x should be relative to delta x = 1024*/
int32_t m;
if(dx) {
m = (1 << 20) / dx; /*m is multiplier to normalize y (upscaled by 1024)*/
param->yx_steep = (m * dy) >> 10;
}
if(dy) {
m = (1 << 20) / dy; /*m is multiplier to normalize x (upscaled by 1024)*/
param->xy_steep = (m * dx) >> 10;
}
param->steep = param->yx_steep;
}
else {
/*Normalize the steep. Delta y should be relative to delta x = 1024*/
int32_t m;
if(dy) {
m = (1 << 20) / dy; /*m is multiplier to normalize x (upscaled by 1024)*/
param->xy_steep = (m * dx) >> 10;
}
if(dx) {
m = (1 << 20) / dx; /*m is multiplier to normalize x (upscaled by 1024)*/
param->yx_steep = (m * dy) >> 10;
}
param->steep = param->xy_steep;
}
if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT) param->inv = 0;
else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT) param->inv = 1;
else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP) {
if(param->steep > 0) param->inv = 1;
else param->inv = 0;
}
else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) {
if(param->steep > 0) param->inv = 0;
else param->inv = 1;
}
param->spx = param->steep >> 2;
if(param->steep < 0) param->spx = -param->spx;
}
/**
*Initialize a line mask from a point and an angle.
* @param param pointer to a `lv_draw_mask_param_t` to initialize
* @param px X coordinate of a point of the line
* @param py X coordinate of a point of the line
* @param angle right 0 deg, bottom: 90
* @param side and element of `lv_draw_mask_line_side_t` to describe which side to keep.
* With `LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT` and horizontal line all pixels are kept
* With `LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM` and vertical line all pixels are kept
*/
void lv_draw_mask_line_angle_init(lv_draw_mask_line_param_t * param, lv_coord_t p1x, lv_coord_t py, int16_t angle,
lv_draw_mask_line_side_t side)
{
/* Find an optimal degree.
* lv_mask_line_points_init will swap the points to keep the smaller y in p1
* Theoretically a line with `angle` or `angle+180` is the same only the points are swapped
* Find the degree which keeps the origo in place */
if(angle > 180) angle -= 180; /*> 180 will swap the origo*/
int32_t p2x;
int32_t p2y;
p2x = (lv_trigo_sin(angle + 90) >> 5) + p1x;
p2y = (lv_trigo_sin(angle) >> 5) + py;
lv_draw_mask_line_points_init(param, p1x, py, p2x, p2y, side);
}
/**
* Initialize an angle mask.
* @param param pointer to a `lv_draw_mask_param_t` to initialize
* @param vertex_x X coordinate of the angle vertex (absolute coordinates)
* @param vertex_y Y coordinate of the angle vertex (absolute coordinates)
* @param start_angle start angle in degrees. 0 deg on the right, 90 deg, on the bottom
* @param end_angle end angle
*/
void lv_draw_mask_angle_init(lv_draw_mask_angle_param_t * param, lv_coord_t vertex_x, lv_coord_t vertex_y,
lv_coord_t start_angle, lv_coord_t end_angle)
{
lv_draw_mask_line_side_t start_side;
lv_draw_mask_line_side_t end_side;
/* Constrain the input angles */
if(start_angle < 0)
start_angle = 0;
else if(start_angle > 359)
start_angle = 359;
if(end_angle < 0)
end_angle = 0;
else if(end_angle > 359)
end_angle = 359;
if(end_angle < start_angle) {
param->delta_deg = 360 - start_angle + end_angle;
}
else {
param->delta_deg = LV_ABS(end_angle - start_angle);
}
param->cfg.start_angle = start_angle;
param->cfg.end_angle = end_angle;
param->cfg.vertex_p.x = vertex_x;
param->cfg.vertex_p.y = vertex_y;
param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_angle;
param->dsc.type = LV_DRAW_MASK_TYPE_ANGLE;
LV_ASSERT_MSG(start_angle >= 0 && start_angle <= 360, "Unexpected start angle");
if(start_angle >= 0 && start_angle < 180) {
start_side = LV_DRAW_MASK_LINE_SIDE_LEFT;
}
else if(start_angle >= 180 && start_angle < 360) {
start_side = LV_DRAW_MASK_LINE_SIDE_RIGHT;
}
else
start_side = LV_DRAW_MASK_LINE_SIDE_RIGHT; /* silence compiler */
LV_ASSERT_MSG(end_angle >= 0 && start_angle <= 360, "Unexpected end angle");
if(end_angle >= 0 && end_angle < 180) {
end_side = LV_DRAW_MASK_LINE_SIDE_RIGHT;
}
else if(end_angle >= 180 && end_angle < 360) {
end_side = LV_DRAW_MASK_LINE_SIDE_LEFT;
}
else
end_side = LV_DRAW_MASK_LINE_SIDE_RIGHT; /* silence compiler */
lv_draw_mask_line_angle_init(&param->start_line, vertex_x, vertex_y, start_angle, start_side);
lv_draw_mask_line_angle_init(&param->end_line, vertex_x, vertex_y, end_angle, end_side);
}
/**
* Initialize a fade mask.
* @param param param pointer to a `lv_draw_mask_param_t` to initialize
* @param rect coordinates of the rectangle to affect (absolute coordinates)
* @param radius radius of the rectangle
* @param inv true: keep the pixels inside the rectangle; keep the pixels outside of the rectangle
*/
void lv_draw_mask_radius_init(lv_draw_mask_radius_param_t * param, const lv_area_t * rect, lv_coord_t radius, bool inv)
{
lv_coord_t w = lv_area_get_width(rect);
lv_coord_t h = lv_area_get_height(rect);
int32_t short_side = LV_MIN(w, h);
if(radius > short_side >> 1) radius = short_side >> 1;
lv_area_copy(&param->cfg.rect, rect);
param->cfg.radius = radius;
param->cfg.outer = inv ? 1 : 0;
param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_radius;
param->dsc.type = LV_DRAW_MASK_TYPE_RADIUS;
param->y_prev = INT32_MIN;
param->y_prev_x.f = 0;
param->y_prev_x.i = 0;
}
/**
* Initialize a fade mask.
* @param param pointer to a `lv_draw_mask_param_t` to initialize
* @param coords coordinates of the area to affect (absolute coordinates)
* @param opa_top opacity on the top
* @param y_top at which coordinate start to change to opacity to `opa_bottom`
* @param opa_bottom opacity at the bottom
* @param y_bottom at which coordinate reach `opa_bottom`.
*/
void lv_draw_mask_fade_init(lv_draw_mask_fade_param_t * param, const lv_area_t * coords, lv_opa_t opa_top,
lv_coord_t y_top,
lv_opa_t opa_bottom, lv_coord_t y_bottom)
{
lv_area_copy(&param->cfg.coords, coords);
param->cfg.opa_top = opa_top;
param->cfg.opa_bottom = opa_bottom;
param->cfg.y_top = y_top;
param->cfg.y_bottom = y_bottom;
param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_fade;
param->dsc.type = LV_DRAW_MASK_TYPE_FADE;
}
/**
* Initialize a map mask.
* @param param pointer to a `lv_draw_mask_param_t` to initialize
* @param coords coordinates of the map (absolute coordinates)
* @param map array of bytes with the mask values
*/
void lv_draw_mask_map_init(lv_draw_mask_map_param_t * param, const lv_area_t * coords, const lv_opa_t * map)
{
lv_area_copy(&param->cfg.coords, coords);
param->cfg.map = map;
param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_map;
param->dsc.type = LV_DRAW_MASK_TYPE_MAP;
}
/**********************
* STATIC FUNCTIONS
**********************/
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_line(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_line_param_t * p)
{
/*Make to points relative to the vertex*/
abs_y -= p->origo.y;
abs_x -= p->origo.x;
/*Handle special cases*/
if(p->steep == 0) {
/*Horizontal*/
if(p->flat) {
/*Non sense: Can't be on the right/left of a horizontal line*/
if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT ||
p->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT) return LV_DRAW_MASK_RES_FULL_COVER;
else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP && abs_y + 1 < 0) return LV_DRAW_MASK_RES_FULL_COVER;
else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM && abs_y > 0) return LV_DRAW_MASK_RES_FULL_COVER;
else {
return LV_DRAW_MASK_RES_TRANSP;
}
}
/*Vertical*/
else {
/*Non sense: Can't be on the top/bottom of a vertical line*/
if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP ||
p->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) return LV_DRAW_MASK_RES_FULL_COVER;
else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT && abs_x > 0) return LV_DRAW_MASK_RES_FULL_COVER;
else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT) {
if(abs_x + len < 0) return LV_DRAW_MASK_RES_FULL_COVER;
else {
int32_t k = - abs_x;
if(k < 0) return LV_DRAW_MASK_RES_TRANSP;
if(k >= 0 && k < len) lv_memset_00(&mask_buf[k], len - k);
return LV_DRAW_MASK_RES_CHANGED;
}
}
else {
if(abs_x + len < 0) return LV_DRAW_MASK_RES_TRANSP;
else {
int32_t k = - abs_x;
if(k < 0) k = 0;
if(k >= len) return LV_DRAW_MASK_RES_TRANSP;
else if(k >= 0 && k < len) lv_memset_00(&mask_buf[0], k);
return LV_DRAW_MASK_RES_CHANGED;
}
}
}
}
lv_draw_mask_res_t res;
if(p->flat) {
res = line_mask_flat(mask_buf, abs_x, abs_y, len, p);
}
else {
res = line_mask_steep(mask_buf, abs_x, abs_y, len, p);
}
return res;
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_flat(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
lv_coord_t len,
lv_draw_mask_line_param_t * p)
{
int32_t y_at_x;
y_at_x = (int32_t)((int32_t)p->yx_steep * abs_x) >> 10;
if(p->yx_steep > 0) {
if(y_at_x > abs_y) {
if(p->inv) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
else {
return LV_DRAW_MASK_RES_TRANSP;
}
}
}
else {
if(y_at_x < abs_y) {
if(p->inv) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
else {
return LV_DRAW_MASK_RES_TRANSP;
}
}
}
/* At the end of the mask if the limit line is smaller then the mask's y.
* Then the mask is in the "good" area*/
y_at_x = (int32_t)((int32_t)p->yx_steep * (abs_x + len)) >> 10;
if(p->yx_steep > 0) {
if(y_at_x < abs_y) {
if(p->inv) {
return LV_DRAW_MASK_RES_TRANSP;
}
else {
return LV_DRAW_MASK_RES_FULL_COVER;
}
}
}
else {
if(y_at_x > abs_y) {
if(p->inv) {
return LV_DRAW_MASK_RES_TRANSP;
}
else {
return LV_DRAW_MASK_RES_FULL_COVER;
}
}
}
int32_t xe;
if(p->yx_steep > 0) xe = ((abs_y << 8) * p->xy_steep) >> 10;
else xe = (((abs_y + 1) << 8) * p->xy_steep) >> 10;
int32_t xei = xe >> 8;
int32_t xef = xe & 0xFF;
int32_t px_h;
if(xef == 0) px_h = 255;
else px_h = 255 - (((255 - xef) * p->spx) >> 8);
int32_t k = xei - abs_x;
lv_opa_t m;
if(xef) {
if(k >= 0 && k < len) {
m = 255 - (((255 - xef) * (255 - px_h)) >> 9);
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k++;
}
while(px_h > p->spx) {
if(k >= 0 && k < len) {
m = px_h - (p->spx >> 1);
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
px_h -= p->spx;
k++;
if(k >= len) break;
}
if(k < len && k >= 0) {
int32_t x_inters = (px_h * p->xy_steep) >> 10;
m = (x_inters * px_h) >> 9;
if(p->yx_steep < 0) m = 255 - m;
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
if(p->inv) {
k = xei - abs_x;
if(k > len) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(k >= 0) {
lv_memset_00(&mask_buf[0], k);
}
}
else {
k++;
if(k < 0) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(k <= len) {
lv_memset_00(&mask_buf[k], len - k);
}
}
return LV_DRAW_MASK_RES_CHANGED;
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_steep(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
lv_coord_t len,
lv_draw_mask_line_param_t * p)
{
int32_t k;
int32_t x_at_y;
/* At the beginning of the mask if the limit line is greater then the mask's y.
* Then the mask is in the "wrong" area*/
x_at_y = (int32_t)((int32_t)p->xy_steep * abs_y) >> 10;
if(p->xy_steep > 0) x_at_y++;
if(x_at_y < abs_x) {
if(p->inv) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
else {
return LV_DRAW_MASK_RES_TRANSP;
}
}
/* At the end of the mask if the limit line is smaller then the mask's y.
* Then the mask is in the "good" area*/
x_at_y = (int32_t)((int32_t)p->xy_steep * (abs_y)) >> 10;
if(x_at_y > abs_x + len) {
if(p->inv) {
return LV_DRAW_MASK_RES_TRANSP;
}
else {
return LV_DRAW_MASK_RES_FULL_COVER;
}
}
/*X start*/
int32_t xs = ((abs_y << 8) * p->xy_steep) >> 10;
int32_t xsi = xs >> 8;
int32_t xsf = xs & 0xFF;
/*X end*/
int32_t xe = (((abs_y + 1) << 8) * p->xy_steep) >> 10;
int32_t xei = xe >> 8;
int32_t xef = xe & 0xFF;
lv_opa_t m;
k = xsi - abs_x;
if(xsi != xei && (p->xy_steep < 0 && xsf == 0)) {
xsf = 0xFF;
xsi = xei;
k--;
}
if(xsi == xei) {
if(k >= 0 && k < len) {
m = (xsf + xef) >> 1;
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k++;
if(p->inv) {
k = xsi - abs_x;
if(k >= len) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(k >= 0) lv_memset_00(&mask_buf[0], k);
}
else {
if(k > len) k = len;
if(k == 0) return LV_DRAW_MASK_RES_TRANSP;
else if(k > 0) lv_memset_00(&mask_buf[k], len - k);
}
}
else {
int32_t y_inters;
if(p->xy_steep < 0) {
y_inters = (xsf * (-p->yx_steep)) >> 10;
if(k >= 0 && k < len) {
m = (y_inters * xsf) >> 9;
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k--;
int32_t x_inters = ((255 - y_inters) * (-p->xy_steep)) >> 10;
if(k >= 0 && k < len) {
m = 255 - (((255 - y_inters) * x_inters) >> 9);
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k += 2;
if(p->inv) {
k = xsi - abs_x - 1;
if(k > len) k = len;
else if(k > 0) lv_memset_00(&mask_buf[0], k);
}
else {
if(k > len) return LV_DRAW_MASK_RES_FULL_COVER;
if(k >= 0) lv_memset_00(&mask_buf[k], len - k);
}
}
else {
y_inters = ((255 - xsf) * p->yx_steep) >> 10;
if(k >= 0 && k < len) {
m = 255 - ((y_inters * (255 - xsf)) >> 9);
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k++;
int32_t x_inters = ((255 - y_inters) * p->xy_steep) >> 10;
if(k >= 0 && k < len) {
m = ((255 - y_inters) * x_inters) >> 9;
if(p->inv) m = 255 - m;
mask_buf[k] = mask_mix(mask_buf[k], m);
}
k++;
if(p->inv) {
k = xsi - abs_x;
if(k > len) return LV_DRAW_MASK_RES_TRANSP;
if(k >= 0) lv_memset_00(&mask_buf[0], k);
}
else {
if(k > len) k = len;
if(k == 0) return LV_DRAW_MASK_RES_TRANSP;
else if(k > 0) lv_memset_00(&mask_buf[k], len - k);
}
}
}
return LV_DRAW_MASK_RES_CHANGED;
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_angle(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_angle_param_t * p)
{
int32_t rel_y = abs_y - p->cfg.vertex_p.y;
int32_t rel_x = abs_x - p->cfg.vertex_p.x;
if(p->cfg.start_angle < 180 && p->cfg.end_angle < 180 &&
p->cfg.start_angle != 0 && p->cfg.end_angle != 0 &&
p->cfg.start_angle > p->cfg.end_angle) {
if(abs_y < p->cfg.vertex_p.y) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
/*Start angle mask can work only from the end of end angle mask */
int32_t end_angle_first = (rel_y * p->end_line.xy_steep) >> 10;
int32_t start_angle_last = ((rel_y + 1) * p->start_line.xy_steep) >> 10;
/*Do not let the line end cross the vertex else it will affect the opposite part*/
if(p->cfg.start_angle > 270 && p->cfg.start_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.start_angle > 0 && p->cfg.start_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.start_angle > 90 && p->cfg.start_angle < 270 && start_angle_last > 0) start_angle_last = 0;
if(p->cfg.end_angle > 270 && p->cfg.end_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.end_angle > 0 && p->cfg.end_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.end_angle > 90 && p->cfg.end_angle < 270 && start_angle_last > 0) start_angle_last = 0;
int32_t dist = (end_angle_first - start_angle_last) >> 1;
lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
int32_t tmp = start_angle_last + dist - rel_x;
if(tmp > len) tmp = len;
if(tmp > 0) {
res1 = lv_draw_mask_line(&mask_buf[0], abs_x, abs_y, tmp, &p->start_line);
if(res1 == LV_DRAW_MASK_RES_TRANSP) {
lv_memset_00(&mask_buf[0], tmp);
}
}
if(tmp > len) tmp = len;
if(tmp < 0) tmp = 0;
res2 = lv_draw_mask_line(&mask_buf[tmp], abs_x + tmp, abs_y, len - tmp, &p->end_line);
if(res2 == LV_DRAW_MASK_RES_TRANSP) {
lv_memset_00(&mask_buf[tmp], len - tmp);
}
if(res1 == res2) return res1;
else return LV_DRAW_MASK_RES_CHANGED;
}
else if(p->cfg.start_angle > 180 && p->cfg.end_angle > 180 && p->cfg.start_angle > p->cfg.end_angle) {
if(abs_y > p->cfg.vertex_p.y) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
/*Start angle mask can work only from the end of end angle mask */
int32_t end_angle_first = (rel_y * p->end_line.xy_steep) >> 10;
int32_t start_angle_last = ((rel_y + 1) * p->start_line.xy_steep) >> 10;
/*Do not let the line end cross the vertex else it will affect the opposite part*/
if(p->cfg.start_angle > 270 && p->cfg.start_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.start_angle > 0 && p->cfg.start_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.start_angle > 90 && p->cfg.start_angle < 270 && start_angle_last > 0) start_angle_last = 0;
if(p->cfg.end_angle > 270 && p->cfg.end_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.end_angle > 0 && p->cfg.end_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
else if(p->cfg.end_angle > 90 && p->cfg.end_angle < 270 && start_angle_last > 0) start_angle_last = 0;
int32_t dist = (end_angle_first - start_angle_last) >> 1;
lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
int32_t tmp = start_angle_last + dist - rel_x;
if(tmp > len) tmp = len;
if(tmp > 0) {
res1 = lv_draw_mask_line(&mask_buf[0], abs_x, abs_y, tmp, (lv_draw_mask_line_param_t *)&p->end_line);
if(res1 == LV_DRAW_MASK_RES_TRANSP) {
lv_memset_00(&mask_buf[0], tmp);
}
}
if(tmp > len) tmp = len;
if(tmp < 0) tmp = 0;
res2 = lv_draw_mask_line(&mask_buf[tmp], abs_x + tmp, abs_y, len - tmp, (lv_draw_mask_line_param_t *)&p->start_line);
if(res2 == LV_DRAW_MASK_RES_TRANSP) {
lv_memset_00(&mask_buf[tmp], len - tmp);
}
if(res1 == res2) return res1;
else return LV_DRAW_MASK_RES_CHANGED;
}
else {
lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
if(p->cfg.start_angle == 180) {
if(abs_y < p->cfg.vertex_p.y) res1 = LV_DRAW_MASK_RES_FULL_COVER;
else res1 = LV_DRAW_MASK_RES_UNKNOWN;
}
else if(p->cfg.start_angle == 0) {
if(abs_y < p->cfg.vertex_p.y) res1 = LV_DRAW_MASK_RES_UNKNOWN;
else res1 = LV_DRAW_MASK_RES_FULL_COVER;
}
else if((p->cfg.start_angle < 180 && abs_y < p->cfg.vertex_p.y) ||
(p->cfg.start_angle > 180 && abs_y >= p->cfg.vertex_p.y)) {
res1 = LV_DRAW_MASK_RES_UNKNOWN;
}
else {
res1 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &p->start_line);
}
if(p->cfg.end_angle == 180) {
if(abs_y < p->cfg.vertex_p.y) res2 = LV_DRAW_MASK_RES_UNKNOWN;
else res2 = LV_DRAW_MASK_RES_FULL_COVER;
}
else if(p->cfg.end_angle == 0) {
if(abs_y < p->cfg.vertex_p.y) res2 = LV_DRAW_MASK_RES_FULL_COVER;
else res2 = LV_DRAW_MASK_RES_UNKNOWN;
}
else if((p->cfg.end_angle < 180 && abs_y < p->cfg.vertex_p.y) ||
(p->cfg.end_angle > 180 && abs_y >= p->cfg.vertex_p.y)) {
res2 = LV_DRAW_MASK_RES_UNKNOWN;
}
else {
res2 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &p->end_line);
}
if(res1 == LV_DRAW_MASK_RES_TRANSP || res2 == LV_DRAW_MASK_RES_TRANSP) return LV_DRAW_MASK_RES_TRANSP;
else if(res1 == LV_DRAW_MASK_RES_UNKNOWN && res2 == LV_DRAW_MASK_RES_UNKNOWN) return LV_DRAW_MASK_RES_TRANSP;
else if(res1 == LV_DRAW_MASK_RES_FULL_COVER && res2 == LV_DRAW_MASK_RES_FULL_COVER) return LV_DRAW_MASK_RES_FULL_COVER;
else return LV_DRAW_MASK_RES_CHANGED;
}
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_radius(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_radius_param_t * p)
{
bool outer = p->cfg.outer;
int32_t radius = p->cfg.radius;
lv_area_t rect;
lv_area_copy(&rect, &p->cfg.rect);
if(outer == false) {
if(abs_y < rect.y1 || abs_y > rect.y2) {
return LV_DRAW_MASK_RES_TRANSP;
}
}
else {
if(abs_y < rect.y1 || abs_y > rect.y2) {
return LV_DRAW_MASK_RES_FULL_COVER;
}
}
if((abs_x >= rect.x1 + radius && abs_x + len <= rect.x2 - radius) ||
(abs_y >= rect.y1 + radius && abs_y <= rect.y2 - radius)) {
if(outer == false) {
/*Remove the edges*/
int32_t last = rect.x1 - abs_x;
if(last > len) return LV_DRAW_MASK_RES_TRANSP;
if(last >= 0) {
lv_memset_00(&mask_buf[0], last);
}
int32_t first = rect.x2 - abs_x + 1;
if(first <= 0) return LV_DRAW_MASK_RES_TRANSP;
else if(first < len) {
lv_memset_00(&mask_buf[first], len - first);
}
if(last == 0 && first == len) return LV_DRAW_MASK_RES_FULL_COVER;
else return LV_DRAW_MASK_RES_CHANGED;
}
else {
int32_t first = rect.x1 - abs_x;
if(first < 0) first = 0;
if(first <= len) {
int32_t last = rect.x2 - abs_x - first + 1;
if(first + last > len) last = len - first;
if(last >= 0) {
lv_memset_00(&mask_buf[first], last);
}
}
}
return LV_DRAW_MASK_RES_CHANGED;
}
int32_t k = rect.x1 - abs_x; /*First relevant coordinate on the of the mask*/
int32_t w = lv_area_get_width(&rect);
int32_t h = lv_area_get_height(&rect);
abs_x -= rect.x1;
abs_y -= rect.y1;
uint32_t r2 = p->cfg.radius * p->cfg.radius;
/*Handle corner areas*/
if(abs_y < radius || abs_y > h - radius - 1) {
uint32_t sqrt_mask;
if(radius <= 32) sqrt_mask = 0x200;
if(radius <= 256) sqrt_mask = 0x800;
else sqrt_mask = 0x8000;
lv_sqrt_res_t x0;
lv_sqrt_res_t x1;
/* y = 0 should mean the top of the circle */
int32_t y;
if(abs_y < radius) {
y = radius - abs_y;
/* Get the x intersection points for `abs_y` and `abs_y-1`
* Use the circle's equation x = sqrt(r^2 - y^2)
* Try to use the values from the previous run*/
if(y == p->y_prev) {
x0.f = p->y_prev_x.f;
x0.i = p->y_prev_x.i;
}
else {
lv_sqrt(r2 - (y * y), &x0, sqrt_mask);
}
lv_sqrt(r2 - ((y - 1) * (y - 1)), &x1, sqrt_mask);
p->y_prev = y - 1;
p->y_prev_x.f = x1.f;
p->y_prev_x.i = x1.i;
}
else {
y = radius - (h - abs_y) + 1;
/* Get the x intersection points for `abs_y` and `abs_y-1`
* Use the circle's equation x = sqrt(r^2 - y^2)
* Try to use the values from the previous run*/
if((y - 1) == p->y_prev) {
x1.f = p->y_prev_x.f;
x1.i = p->y_prev_x.i;
}
else {
lv_sqrt(r2 - ((y - 1) * (y - 1)), &x1, sqrt_mask);
}
lv_sqrt(r2 - (y * y), &x0, sqrt_mask);
p->y_prev = y;
p->y_prev_x.f = x0.f;
p->y_prev_x.i = x0.i;
}
/* If x1 is on the next round coordinate (e.g. x0: 3.5, x1:4.0)
* then treat x1 as x1: 3.99 to handle them as they were on the same pixel*/
if(x0.i == x1.i - 1 && x1.f == 0) {
x1.i--;
x1.f = 0xFF;
}
/*If the two x intersections are on the same x then just get average of the fractions*/
if(x0.i == x1.i) {
lv_opa_t m = (x0.f + x1.f) >> 1;
if(outer) m = 255 - m;
int32_t ofs = radius - x0.i - 1;
/*Left corner*/
int32_t kl = k + ofs;
if(kl >= 0 && kl < len) {
mask_buf[kl] = mask_mix(mask_buf[kl], m);
}
/*Right corner*/
int32_t kr = k + (w - ofs - 1);
if(kr >= 0 && kr < len) {
mask_buf[kr] = mask_mix(mask_buf[kr], m);
}
/*Clear the unused parts*/
if(outer == false) {
kr++;
if(kl > len) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(kl >= 0) {
lv_memset_00(&mask_buf[0], kl);
}
if(kr < 0) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(kr <= len) {
lv_memset_00(&mask_buf[kr], len - kr);
}
}
else {
kl++;
int32_t first = kl;
if(first < 0) first = 0;
int32_t len_tmp = kr - first;
if(len_tmp + first > len) len_tmp = len - first;
if(first < len && len_tmp >= 0) {
lv_memset_00(&mask_buf[first], len_tmp);
}
}
}
/*Multiple pixels are affected. Get y intersection of the pixels*/
else {
int32_t ofs = radius - (x0.i + 1);
int32_t kl = k + ofs;
int32_t kr = k + (w - ofs - 1);
if(outer) {
int32_t first = kl + 1;
if(first < 0) first = 0;
int32_t len_tmp = kr - first;
if(len_tmp + first > len) len_tmp = len - first;
if(first < len && len_tmp >= 0) {
lv_memset_00(&mask_buf[first], len_tmp);
}
}
uint32_t i = x0.i + 1;
lv_opa_t m;
lv_sqrt_res_t y_prev;
lv_sqrt_res_t y_next;
lv_sqrt(r2 - (x0.i * x0.i), &y_prev, sqrt_mask);
if(y_prev.f == 0) {
y_prev.i--;
y_prev.f = 0xFF;
}
/*The first y intersection is special as it might be in the previous line*/
if(y_prev.i >= y) {
lv_sqrt(r2 - (i * i), &y_next, sqrt_mask);
m = 255 - (((255 - x0.f) * (255 - y_next.f)) >> 9);
if(outer) m = 255 - m;
if(kl >= 0 && kl < len) mask_buf[kl] = mask_mix(mask_buf[kl], m);
if(kr >= 0 && kr < len) mask_buf[kr] = mask_mix(mask_buf[kr], m);
kl--;
kr++;
y_prev.f = y_next.f;
i++;
}
/*Set all points which are crossed by the circle*/
for(; i <= x1.i; i++) {
/* These values are very close to each other. It's enough to approximate sqrt
* The non-approximated version is lv_sqrt(r2 - (i * i), &y_next, sqrt_mask); */
sqrt_approx(&y_next, &y_prev, r2 - (i * i));
m = (y_prev.f + y_next.f) >> 1;
if(outer) m = 255 - m;
if(kl >= 0 && kl < len) mask_buf[kl] = mask_mix(mask_buf[kl], m);
if(kr >= 0 && kr < len) mask_buf[kr] = mask_mix(mask_buf[kr], m);
kl--;
kr++;
y_prev.f = y_next.f;
}
/*If the last pixel was left in its middle therefore
* the circle still has parts on the next one*/
if(y_prev.f) {
m = (y_prev.f * x1.f) >> 9;
if(outer) m = 255 - m;
if(kl >= 0 && kl < len) mask_buf[kl] = mask_mix(mask_buf[kl], m);
if(kr >= 0 && kr < len) mask_buf[kr] = mask_mix(mask_buf[kr], m);
kl--;
kr++;
}
if(outer == 0) {
kl++;
if(kl > len) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(kl >= 0) lv_memset_00(&mask_buf[0], kl);
if(kr < 0) {
return LV_DRAW_MASK_RES_TRANSP;
}
if(kr < len) lv_memset_00(&mask_buf[kr], len - kr);
}
}
}
return LV_DRAW_MASK_RES_CHANGED;
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_fade(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_fade_param_t * p)
{
if(abs_y < p->cfg.coords.y1) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_y > p->cfg.coords.y2) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_x + len < p->cfg.coords.x1) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_x > p->cfg.coords.x2) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_x + len > p->cfg.coords.x2) len -= abs_x + len - p->cfg.coords.x2 - 1;
if(abs_x < p->cfg.coords.x1) {
int32_t x_ofs = 0;
x_ofs = p->cfg.coords.x1 - abs_x;
len -= x_ofs;
mask_buf += x_ofs;
}
int32_t i;
if(abs_y <= p->cfg.y_top) {
for(i = 0; i < len; i++) {
mask_buf[i] = mask_mix(mask_buf[i], p->cfg.opa_top);
}
return LV_DRAW_MASK_RES_CHANGED;
}
else if(abs_y >= p->cfg.y_bottom) {
for(i = 0; i < len; i++) {
mask_buf[i] = mask_mix(mask_buf[i], p->cfg.opa_bottom);
}
return LV_DRAW_MASK_RES_CHANGED;
}
else {
/*Calculate the opa proportionally*/
int16_t opa_diff = p->cfg.opa_bottom - p->cfg.opa_top;
int32_t y_diff = p->cfg.y_bottom - p->cfg.y_top + 1;
lv_opa_t opa_act = (int32_t)((int32_t)(abs_y - p->cfg.y_top) * opa_diff) / y_diff;
opa_act += p->cfg.opa_top;
for(i = 0; i < len; i++) {
mask_buf[i] = mask_mix(mask_buf[i], opa_act);
}
return LV_DRAW_MASK_RES_CHANGED;
}
}
LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_map(lv_opa_t * mask_buf, lv_coord_t abs_x,
lv_coord_t abs_y, lv_coord_t len,
lv_draw_mask_map_param_t * p)
{
/*Handle out of the mask cases*/
if(abs_y < p->cfg.coords.y1) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_y > p->cfg.coords.y2) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_x + len < p->cfg.coords.x1) return LV_DRAW_MASK_RES_FULL_COVER;
if(abs_x > p->cfg.coords.x2) return LV_DRAW_MASK_RES_FULL_COVER;
/*Got to the current row in the map*/
const lv_opa_t * map_tmp = p->cfg.map;
map_tmp += (abs_y - p->cfg.coords.y1) * lv_area_get_width(&p->cfg.coords);
if(abs_x + len > p->cfg.coords.x2) len -= abs_x + len - p->cfg.coords.x2 - 1;
if(abs_x < p->cfg.coords.x1) {
int32_t x_ofs = 0;
x_ofs = p->cfg.coords.x1 - abs_x;
len -= x_ofs;
mask_buf += x_ofs;
}
else {
map_tmp += (abs_x - p->cfg.coords.x1);
}
int32_t i;
for(i = 0; i < len; i++) {
mask_buf[i] = mask_mix(mask_buf[i], map_tmp[i]);
}
return LV_DRAW_MASK_RES_CHANGED;
}
LV_ATTRIBUTE_FAST_MEM static inline lv_opa_t mask_mix(lv_opa_t mask_act, lv_opa_t mask_new)
{
if(mask_new >= LV_OPA_MAX) return mask_act;
if(mask_new <= LV_OPA_MIN) return 0;
return LV_UDIV255(mask_act * mask_new);// >> 8);
}
/**
* Approximate the sqrt near to an already calculated value
* @param q store the result here
* @param ref the reference point (already calculated sqrt)
* @param x the value which sqrt should be approximated
*/
LV_ATTRIBUTE_FAST_MEM static inline void sqrt_approx(lv_sqrt_res_t * q, lv_sqrt_res_t * ref, uint32_t x)
{
x = x << 8; /*Upscale for extra precision*/
uint32_t raw = (ref->i << 4) + (ref->f >> 4);
uint32_t raw2 = raw * raw;
int32_t d = x - raw2;
d = (int32_t)d / (int32_t)(2 * raw) + raw;
q->i = d >> 4;
q->f = (d & 0xF) << 4;
}
#endif /*LV_DRAW_COMPLEX*/
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