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line_as_ansi: only compute sgr if needed

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Dominique Martinet 2018-09-15 23:12:02 +09:00
parent ee39d7ba14
commit a4c2a9ef0d
1 changed files with 11 additions and 7 deletions
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18
kitty/line.c
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@ -237,21 +237,25 @@ line_as_ansi(Line *self, Py_UCS4 *buf, index_type buflen) {
WRITE_SGR("0");
Cursor c1 = {{0}}, c2 = {{0}};
Cursor *cursor = &c1, *prev_cursor = &c2, *t;
Cursor *cursor = &c1, *prev_cursor = &c2;
char_type prev_attrs = 0;
for (index_type pos=0; pos < limit; pos++) {
bool need_sgr = false;
char_type attrs = self->gpu_cells[pos].attrs, ch = self->cpu_cells[pos].ch;
if (ch == 0) {
if (previous_width == 2) { previous_width = 0; continue; }
ch = ' ';
}
ATTRS_TO_CURSOR(attrs, cursor);
cursor->fg = self->gpu_cells[pos].fg; cursor->bg = self->gpu_cells[pos].bg;
cursor->decoration_fg = self->gpu_cells[pos].decoration_fg & COL_MASK;
if (attrs != prev_attrs) { ATTRS_TO_CURSOR(attrs, cursor); need_sgr = true; prev_attrs = attrs; }
#define CMPSET(color) if (cursor->color != self->gpu_cells[pos].color) { cursor->color = self->gpu_cells[pos].color; need_sgr = true; }
CMPSET(fg); CMPSET(bg); CMPSET(decoration_fg);
const char *sgr = cursor_as_sgr(cursor, prev_cursor);
t = prev_cursor; prev_cursor = cursor; cursor = t;
if (*sgr) WRITE_SGR(sgr);
if (need_sgr) {
const char *sgr = cursor_as_sgr(cursor, prev_cursor);
*prev_cursor = *cursor;
if (*sgr) WRITE_SGR(sgr);
}
WRITE_CH(ch);
for(unsigned c = 0; c < arraysz(self->cpu_cells[pos].cc_idx) && self->cpu_cells[pos].cc_idx[c]; c++) {
WRITE_CH(codepoint_for_mark(self->cpu_cells[pos].cc_idx[c]));