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perf(terminal): optimize string rendering via color buffering

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boreddevnl 2026-05-11 19:52:18 +02:00
parent 309f68df48
commit 78a9afebf4
1 changed files with 29 additions and 8 deletions
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37
src/userland/gui/terminal.c
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@ -793,6 +793,11 @@ static void draw_session(TerminalSession *s) {
int input_end = input_start + cmd_char_len;
if (input_end > g_cols) input_end = g_cols;
char row_buf[512];
int buf_idx = 0;
uint32_t current_color = 0;
int start_col = -1;
for (int col = 0; col < g_cols; col++) {
uint32_t ch = ' ';
uint32_t color = s->fg_color;
@ -809,13 +814,28 @@ static void draw_session(TerminalSession *s) {
}
}
char out[5];
int len = text_encode_utf8(ch, out);
out[len] = 0;
int x = col * g_char_w;
int y = base_y + row * g_line_h;
ui_draw_string(g_win, x, y, out, color);
if (start_col == -1) {
start_col = col;
current_color = color;
buf_idx = 0;
} else if (color != current_color || buf_idx > 480) {
// Flush buffer
row_buf[buf_idx] = 0;
ui_draw_string(g_win, start_col * g_char_w, base_y + row * g_line_h, row_buf, current_color);
start_col = col;
current_color = color;
buf_idx = 0;
}
char utf8[5];
int len = text_encode_utf8(ch, utf8);
for (int k = 0; k < len; k++) row_buf[buf_idx++] = utf8[k];
}
if (start_col != -1 && buf_idx > 0) {
row_buf[buf_idx] = 0;
ui_draw_string(g_win, start_col * g_char_w, base_y + row * g_line_h, row_buf, current_color);
}
}
@ -1265,8 +1285,9 @@ int main(void) {
if (dirty) {
draw_tabs();
draw_session(&g_tabs[g_active_tab]);
dirty = false;
} else {
sys_yield();
sys_system(SYSTEM_CMD_SLEEP, 50, 0, 0, 0);
}
}