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flood_fill_seed: separate a logic to fill a line

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YAMAMOTO Takashi 2021-05-11 12:53:15 +09:00
parent f1dd37fbdb
commit aad3fc63b6
1 changed files with 31 additions and 12 deletions
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43
lib/identify.c
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@ -124,6 +124,35 @@ static void perspective_unmap(const double *c,
typedef void (*span_func_t)(void *user_data, int y, int left, int right); typedef void (*span_func_t)(void *user_data, int y, int left, int right);
static void flood_fill_line(struct quirc *q, int x, int y,
int from, int to,
int *leftp, int *rightp)
{
quirc_pixel_t *row;
int left;
int right;
int i;
left = x;
right = x;
row = q->pixels + y * q->w;
while (left > 0 && row[left - 1] == from)
left--;
while (right < q->w - 1 && row[right + 1] == from)
right++;
/* Fill the extent */
for (i = left; i <= right; i++)
row[i] = to;
/* Return the processed range */
*leftp = left;
*rightp = right;
}
static void flood_fill_seed(struct quirc *q, static void flood_fill_seed(struct quirc *q,
int x0, int y0, int x0, int y0,
int from, int to, int from, int to,
@ -146,20 +175,10 @@ static void flood_fill_seed(struct quirc *q,
call: call:
vars = next_vars; vars = next_vars;
vars->left = vars->x;
vars->right = vars->x;
row = q->pixels + vars->y * q->w;
while (vars->left > 0 && row[vars->left - 1] == from)
vars->left--;
while (vars->right < q->w - 1 && row[vars->right + 1] == from)
vars->right++;
/* Fill the extent */ /* Fill the extent */
for (i = vars->left; i <= vars->right; i++) flood_fill_line(q, vars->x, vars->y, from, to, &vars->left,
row[i] = to; &vars->right);
if (func) if (func)
func(user_data, vars->y, vars->left, vars->right); func(user_data, vars->y, vars->left, vars->right);