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Rewritten add_chars macro.

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Before it redrawn only changed cells, but were problems with ghosts.
See test/fresh.html. Now it redraws whole lines, which were modified.
This commit is contained in:
Witold Filipczyk 2017-11-23 11:40:21 +01:00
parent 48ba074969
commit 49f41d4371
1 changed files with 20 additions and 16 deletions
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32
src/terminal/screen.c
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@ -1271,19 +1271,19 @@ add_char_true(struct string *screen, struct screen_driver *driver,
{ \
struct terminal_screen *screen = (term_)->screen; \
int y = screen->dirty_from; \
int ypos = y * (term_)->width; \
int prev_y = -1; \
int xmax = (term_)->width - 1; \
int ymax = (term_)->height - 1; \
struct screen_char *current = &screen->last_image[ypos]; \
struct screen_char *pos = &screen->image[ypos]; \
struct screen_char *prev_pos = NULL; /* Warning prevention. */ \
\
int_upper_bound(&screen->dirty_to, ymax); \
\
for (; y <= screen->dirty_to; y++) { \
int ypos = y * (term_)->width; \
struct screen_char *current = &screen->last_image[ypos]; \
struct screen_char *pos = &screen->image[ypos]; \
struct screen_char *start_of_line = pos; \
int is_last_line = (y == ymax); \
int x = 0; \
int dirty = 0; \
\
for (; x <= xmax; x++, current++, pos++) { \
/* Workaround for terminals without
@ -1298,17 +1298,21 @@ add_char_true(struct string *screen, struct screen_driver *driver,
if (is_last_line && x == xmax) \
break; \
\
\
/* Move the cursor when @prev_pos is more than 10 chars
* away. */ \
if (prev_y != y || prev_pos + 10 <= pos) { \
add_cursor_move_to_string(image_, y + 1, x + 1);\
prev_pos = pos; \
prev_y = y; \
if (!compare_bg_color(pos->c.color, current->c.color) || \
!compare_fg_color(pos->c.color, current->c.color) || \
!(pos->attr == current->attr) || \
!(((pos->data > ' ') || (current->data > ' ')) \
&& (pos->data != current->data))) { \
dirty = 1; \
break; \
} \
} \
\
for (; prev_pos <= pos ; prev_pos++) \
ADD_CHAR(image_, driver_, prev_pos, state_); \
if (!dirty) \
continue; \
add_cursor_move_to_string(image_, y + 1, 1); \
for (pos = start_of_line, x = 0; x <= xmax; x++, pos++) { \
ADD_CHAR(image_, driver_, pos, state_); \
} \
} \
}