╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ Title.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
510 0b000000 => ' ', 511 0b010101 => 0x258C, // ▌ left half block 512 0b101010 => 0x2590, // ▐ right half block 513 0b111111 => 0x2588, // █ full block 514 else => blk: { 515 var offset: u21 = @as(u21, pattern) - 1; 516 if (pattern > 0b010101) offset -= 1; 517 if (pattern > 0b101010) offset -= 1; 518 break :blk 0x1FB00 + offset; 519 }, 520 }; 521 } 522 523 fn renderTitle(allocator: std.mem.Allocator, input: []const u8) ![]const u8 { 524 var rows: [3]std.ArrayList(u8) = .{ .empty, .empty, .empty }; 525 defer for (&rows) |*r| r.deinit(allocator); 526 527 var first = true; 528 for (input) |c| { 529 const glyph = glyphFor(c) orelse continue; 530 531 // row-aligned dither: keep on-pixels only at even bitmap rows. 532 var kept: [9][6]bool = std.mem.zeroes([9][6]bool); 533 for (0..9) |r| { 534 if (r % 2 != 0) continue; 535 for (0..6) |col| { 536 kept[r][col] = glyph[r][col] == '#'; 537 } 538 } 539 540 if (!first) { 541 for (&rows) |*r| try r.append(allocator, ' '); 542 } 543 first = false; 544 545 for (0..3) |text_row| { 546 for (0..3) |text_col| { 547 var pattern: u6 = 0; 548 for (0..3) |sub_row| { 549 for (0..2) |sub_col| { 550 const row_idx = text_row * 3 + sub_row; 551 const col_idx = text_col * 2 + sub_col; 552 if (kept[row_idx][col_idx]) { 553 pattern |= @as(u6, 1) << @intCast(sub_row * 2 + sub_col); 554 } 555 } 556 } 557 const cp = sextantCodepoint(pattern); 558 var utf8_buf: [4]u8 = undefined; 559 const len = try std.unicode.utf8Encode(cp, &utf8_buf); 560 try rows[text_row].appendSlice(allocator, utf8_buf[0..len]); 561 } 562 } 563 } 564 565 var out: std.ArrayList(u8) = .empty; 566 errdefer out.deinit(allocator); 567 try out.appendSlice(allocator, rows[0].items); 568 try out.append(allocator, '\n'); 569 try out.appendSlice(allocator, rows[1].items); 570 try out.append(allocator, '\n'); 571 try out.appendSlice(allocator, rows[2].items); 572 return out.toOwnedSlice(allocator); 573 } 574