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shadow: Draw transparent shadow like Turbo Vision.

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This commit is contained in:
Witold Filipczyk 2007-05-16 13:42:36 +02:00 committed by Witold Filipczyk
parent 29bfa86d5d
commit c6a8822926
1 changed files with 38 additions and 2 deletions
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40
src/terminal/draw.c
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@ -392,6 +392,42 @@ draw_box(struct terminal *term, struct box *box,
set_screen_dirty(term->screen, box->y, box->y + box->height);
}
static void
draw_transparent_box(struct terminal *term, struct box *box,
struct color_pair *color)
{
struct screen_char *line, *pos, *end;
int width, height;
line = get_char(term, box->x, box->y);
if (!line) return;
height = int_min(box->height, term->height - box->y);
width = int_min(box->width, term->width - box->x);
if (height <= 0 || width <= 0) return;
/* Compose off the ending screen position in the areas first line. */
end = &line[width - 1];
if (color) {
set_term_color(end, color, 0,
get_opt_int_tree(term->spec, "colors"));
} else {
clear_screen_char_color(end);
}
pos = line;
while (height--) {
int i;
for (i = 0; i < width; i++) {
memcpy((pos + i)->color, end->color, SCREEN_COLOR_SIZE);
}
pos += term->width;
}
set_screen_dirty(term->screen, box->y, box->y + box->height);
}
void
draw_shadow(struct terminal *term, struct box *box,
struct color_pair *color, int width, int height)
@ -402,13 +438,13 @@ draw_shadow(struct terminal *term, struct box *box,
set_box(&dbox, box->x + width, box->y + box->height,
box->width - width, height);
draw_box(term, &dbox, ' ', 0, color);
draw_transparent_box(term, &dbox, color);
/* (vertical) */
set_box(&dbox, box->x + box->width, box->y + height,
width, box->height);
draw_box(term, &dbox, ' ', 0, color);
draw_transparent_box(term, &dbox, color);
}
#ifdef CONFIG_UTF8