feat(gui): add geometric rendering of more box and line drawing symbols
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1 changed files with 312 additions and 4 deletions
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@ -101,11 +101,13 @@ pub fn render(
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const cw: i32 = @intCast(font.cell_size.x);
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const cw: i32 = @intCast(font.cell_size.x);
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const ch: i32 = @intCast(font.cell_size.y);
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const ch: i32 = @intCast(font.cell_size.y);
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// Block element characters (U+2580–U+259F) are rasterized geometrically
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// Block element characters, box-drawing, and related Unicode symbols are
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// rather than through the TrueType anti-aliasing path. Anti-aliased edges
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// rasterized geometrically rather than through the TrueType anti-aliasing path.
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// produce partial-alpha pixels at cell boundaries, creating visible seams
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// Anti-aliased edges produce partial-alpha pixels at cell boundaries, creating
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// between adjacent cells when fg ≠ bg.
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// visible seams between adjacent cells when fg ≠ bg.
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if (renderBlockElement(codepoint, staging_buf, buf_w, buf_h, x_offset, cw, ch)) return;
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if (renderBlockElement(codepoint, staging_buf, buf_w, buf_h, x_offset, cw, ch)) return;
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if (renderBoxDrawing(codepoint, staging_buf, buf_w, buf_h, x_offset, cw, ch)) return;
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if (renderExtendedBlocks(codepoint, staging_buf, buf_w, buf_h, x_offset, cw, ch)) return;
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var arena = std.heap.ArenaAllocator.init(self.allocator);
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var arena = std.heap.ArenaAllocator.init(self.allocator);
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defer arena.deinit();
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defer arena.deinit();
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@ -220,6 +222,312 @@ fn renderBlockElement(
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},
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},
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0x2594 => fillRect(buf, buf_w, buf_h, x0, 0, x1, @divTrunc(ch, 8)), // ▔ upper 1/8
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0x2594 => fillRect(buf, buf_w, buf_h, x0, 0, x1, @divTrunc(ch, 8)), // ▔ upper 1/8
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0x2595 => fillRect(buf, buf_w, buf_h, x1 - @divTrunc(cw, 8), 0, x1, ch), // ▕ right 1/8
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0x2595 => fillRect(buf, buf_w, buf_h, x1 - @divTrunc(cw, 8), 0, x1, ch), // ▕ right 1/8
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0x2596 => fillRect(buf, buf_w, buf_h, x0, half_h, mid_x, ch), // ▖ lower-left quadrant
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0x2597 => fillRect(buf, buf_w, buf_h, mid_x, half_h, x1, ch), // ▗ lower-right quadrant
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0x2598 => fillRect(buf, buf_w, buf_h, x0, 0, mid_x, half_h), // ▘ upper-left quadrant
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0x2599 => { // ▙ upper-left + lower-left + lower-right
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fillRect(buf, buf_w, buf_h, x0, 0, mid_x, ch);
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fillRect(buf, buf_w, buf_h, mid_x, half_h, x1, ch);
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},
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0x259A => { // ▚ upper-left + lower-right (diagonal)
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fillRect(buf, buf_w, buf_h, x0, 0, mid_x, half_h);
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fillRect(buf, buf_w, buf_h, mid_x, half_h, x1, ch);
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},
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0x259B => { // ▛ upper-left + upper-right + lower-left
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fillRect(buf, buf_w, buf_h, x0, 0, x1, half_h);
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fillRect(buf, buf_w, buf_h, x0, half_h, mid_x, ch);
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},
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0x259C => { // ▜ upper-left + upper-right + lower-right
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fillRect(buf, buf_w, buf_h, x0, 0, x1, half_h);
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fillRect(buf, buf_w, buf_h, mid_x, half_h, x1, ch);
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},
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0x259D => fillRect(buf, buf_w, buf_h, mid_x, 0, x1, half_h), // ▝ upper-right quadrant
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0x259E => { // ▞ upper-right + lower-left (diagonal)
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fillRect(buf, buf_w, buf_h, mid_x, 0, x1, half_h);
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fillRect(buf, buf_w, buf_h, x0, half_h, mid_x, ch);
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},
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0x259F => { // ▟ upper-right + lower-left + lower-right
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fillRect(buf, buf_w, buf_h, mid_x, 0, x1, half_h);
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fillRect(buf, buf_w, buf_h, x0, half_h, x1, ch);
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},
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else => return false,
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}
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return true;
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}
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/// Render a box-drawing character (U+2500–U+257F) geometrically.
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fn renderBoxDrawing(
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cp: u21,
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buf: []u8,
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buf_w: i32,
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buf_h: i32,
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x0: i32,
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cw: i32,
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ch: i32,
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) bool {
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if (cp < 0x2500 or cp > 0x257F) return false;
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const x1 = x0 + cw;
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// Single-line stroke thickness: ~1/8 of cell, minimum 1 pixel
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const lh: i32 = @max(1, @divTrunc(ch, 8));
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const lw: i32 = @max(1, @divTrunc(cw, 8));
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// Single-line center positions
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const hy0: i32 = @divTrunc(ch - lh, 2);
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const hy1: i32 = hy0 + lh;
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const vx0: i32 = x0 + @divTrunc(cw - lw, 2);
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const vx1: i32 = vx0 + lw;
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// Double-line: two strokes offset from center by doff each side.
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// doff is chosen so the two strokes fit symmetrically without overlap.
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const doff_h: i32 = @max(lh + 1, @divTrunc(ch, 6));
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const doff_w: i32 = @max(lw + 1, @divTrunc(cw, 6));
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// Horizontal double strokes (top = closer to top of cell):
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const dhy0t: i32 = @divTrunc(ch, 2) - doff_h;
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const dhy1t: i32 = dhy0t + lh;
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const dhy0b: i32 = @divTrunc(ch, 2) + doff_h - lh;
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const dhy1b: i32 = dhy0b + lh;
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// Vertical double strokes (left = closer to left of cell):
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const dvx0l: i32 = x0 + @divTrunc(cw, 2) - doff_w;
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const dvx1l: i32 = dvx0l + lw;
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const dvx0r: i32 = x0 + @divTrunc(cw, 2) + doff_w - lw;
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const dvx1r: i32 = dvx0r + lw;
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switch (cp) {
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// ─ light horizontal
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0x2500 => fillRect(buf, buf_w, buf_h, x0, hy0, x1, hy1),
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// │ light vertical
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0x2502 => fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch),
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// ┌ down+right (NW corner)
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0x250C => {
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fillRect(buf, buf_w, buf_h, vx0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, hy0, vx1, ch);
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},
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// ┐ down+left (NE corner)
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0x2510 => {
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fillRect(buf, buf_w, buf_h, x0, hy0, vx1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, hy0, vx1, ch);
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},
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// └ up+right (SW corner)
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0x2514 => {
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fillRect(buf, buf_w, buf_h, vx0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, hy1);
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},
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// ┘ up+left (SE corner)
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0x2518 => {
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fillRect(buf, buf_w, buf_h, x0, hy0, vx1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, hy1);
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},
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// ├ vertical + right
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0x251C => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch);
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fillRect(buf, buf_w, buf_h, vx0, hy0, x1, hy1);
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},
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// ┤ vertical + left
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0x2524 => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch);
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fillRect(buf, buf_w, buf_h, x0, hy0, vx1, hy1);
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},
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// ┬ horizontal + down
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0x252C => {
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fillRect(buf, buf_w, buf_h, x0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, hy0, vx1, ch);
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},
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// ┴ horizontal + up
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0x2534 => {
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fillRect(buf, buf_w, buf_h, x0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, hy1);
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},
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// ┼ cross
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0x253C => {
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fillRect(buf, buf_w, buf_h, x0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch);
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},
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// ═ double horizontal
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0x2550 => {
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fillRect(buf, buf_w, buf_h, x0, dhy0t, x1, dhy1t);
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fillRect(buf, buf_w, buf_h, x0, dhy0b, x1, dhy1b);
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},
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// ║ double vertical
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0x2551 => {
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fillRect(buf, buf_w, buf_h, dvx0l, 0, dvx1l, ch);
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fillRect(buf, buf_w, buf_h, dvx0r, 0, dvx1r, ch);
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},
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// ╔ double NW corner (down+right)
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0x2554 => {
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fillRect(buf, buf_w, buf_h, dvx0l, dhy0t, x1, dhy1t); // outer horiz →
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fillRect(buf, buf_w, buf_h, dvx0r, dhy0b, x1, dhy1b); // inner horiz →
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fillRect(buf, buf_w, buf_h, dvx0l, dhy0t, dvx1l, ch); // outer vert ↓
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fillRect(buf, buf_w, buf_h, dvx0r, dhy0b, dvx1r, ch); // inner vert ↓
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},
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// ╗ double NE corner (down+left)
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0x2557 => {
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fillRect(buf, buf_w, buf_h, x0, dhy0t, dvx1r, dhy1t); // outer horiz ←
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fillRect(buf, buf_w, buf_h, x0, dhy0b, dvx1l, dhy1b); // inner horiz ←
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fillRect(buf, buf_w, buf_h, dvx0r, dhy0t, dvx1r, ch); // outer vert ↓
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fillRect(buf, buf_w, buf_h, dvx0l, dhy0b, dvx1l, ch); // inner vert ↓
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},
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// ╚ double SW corner (up+right)
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0x255A => {
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fillRect(buf, buf_w, buf_h, dvx0l, dhy0t, x1, dhy1t); // outer horiz →
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fillRect(buf, buf_w, buf_h, dvx0r, dhy0b, x1, dhy1b); // inner horiz →
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fillRect(buf, buf_w, buf_h, dvx0l, 0, dvx1l, dhy1t); // outer vert ↑
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fillRect(buf, buf_w, buf_h, dvx0r, 0, dvx1r, dhy1b); // inner vert ↑
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},
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// ╝ double SE corner (up+left)
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0x255D => {
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fillRect(buf, buf_w, buf_h, x0, dhy0t, dvx1r, dhy1t); // outer horiz ←
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fillRect(buf, buf_w, buf_h, x0, dhy0b, dvx1l, dhy1b); // inner horiz ←
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fillRect(buf, buf_w, buf_h, dvx0r, 0, dvx1r, dhy1t); // outer vert ↑
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fillRect(buf, buf_w, buf_h, dvx0l, 0, dvx1l, dhy1b); // inner vert ↑
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},
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// ╞ single vert + double right
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0x255E => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch);
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fillRect(buf, buf_w, buf_h, vx0, dhy0t, x1, dhy1t);
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fillRect(buf, buf_w, buf_h, vx0, dhy0b, x1, dhy1b);
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},
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// ╡ single vert + double left
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0x2561 => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, ch);
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fillRect(buf, buf_w, buf_h, x0, dhy0t, vx1, dhy1t);
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fillRect(buf, buf_w, buf_h, x0, dhy0b, vx1, dhy1b);
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},
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// ╒ down single, right double
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0x2552 => {
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fillRect(buf, buf_w, buf_h, vx0, dhy0t, vx1, ch); // single vert ↓
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fillRect(buf, buf_w, buf_h, vx0, dhy0t, x1, dhy1t); // outer horiz →
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fillRect(buf, buf_w, buf_h, vx0, dhy0b, x1, dhy1b); // inner horiz →
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},
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// ╕ down single, left double
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0x2555 => {
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fillRect(buf, buf_w, buf_h, vx0, dhy0t, vx1, ch); // single vert ↓
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fillRect(buf, buf_w, buf_h, x0, dhy0t, vx1, dhy1t); // outer horiz ←
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fillRect(buf, buf_w, buf_h, x0, dhy0b, vx1, dhy1b); // inner horiz ←
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},
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// ╘ up single, right double
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0x2558 => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, dhy1b); // single vert ↑
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fillRect(buf, buf_w, buf_h, vx0, dhy0t, x1, dhy1t); // outer horiz →
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fillRect(buf, buf_w, buf_h, vx0, dhy0b, x1, dhy1b); // inner horiz →
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},
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// ╛ up single, left double
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0x255B => {
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, dhy1b); // single vert ↑
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fillRect(buf, buf_w, buf_h, x0, dhy0t, vx1, dhy1t); // outer horiz ←
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fillRect(buf, buf_w, buf_h, x0, dhy0b, vx1, dhy1b); // inner horiz ←
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},
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// ╓ down double, right single
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0x2553 => {
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fillRect(buf, buf_w, buf_h, dvx0l, hy0, x1, hy1); // single horiz →
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fillRect(buf, buf_w, buf_h, dvx0l, hy0, dvx1l, ch); // left double vert ↓
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fillRect(buf, buf_w, buf_h, dvx0r, hy0, dvx1r, ch); // right double vert ↓
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},
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// ╖ down double, left single
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0x2556 => {
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fillRect(buf, buf_w, buf_h, x0, hy0, dvx1r, hy1); // single horiz ←
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fillRect(buf, buf_w, buf_h, dvx0l, hy0, dvx1l, ch); // left double vert ↓
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fillRect(buf, buf_w, buf_h, dvx0r, hy0, dvx1r, ch); // right double vert ↓
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},
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// ╙ up double, right single
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0x2559 => {
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fillRect(buf, buf_w, buf_h, dvx0l, hy0, x1, hy1); // single horiz →
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fillRect(buf, buf_w, buf_h, dvx0l, 0, dvx1l, hy1); // left double vert ↑
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fillRect(buf, buf_w, buf_h, dvx0r, 0, dvx1r, hy1); // right double vert ↑
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},
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// ╜ up double, left single
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0x255C => {
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fillRect(buf, buf_w, buf_h, x0, hy0, dvx1r, hy1); // single horiz ←
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fillRect(buf, buf_w, buf_h, dvx0l, 0, dvx1l, hy1); // left double vert ↑
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fillRect(buf, buf_w, buf_h, dvx0r, 0, dvx1r, hy1); // right double vert ↑
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},
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// ╭ round down+right = ┌, ╮ round down+left = ┐
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// ╯ round up+left = ┘, ╰ round up+right = └
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0x256D => {
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fillRect(buf, buf_w, buf_h, vx0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, hy0, vx1, ch);
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},
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0x256E => {
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fillRect(buf, buf_w, buf_h, x0, hy0, vx1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, hy0, vx1, ch);
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},
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0x256F => {
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fillRect(buf, buf_w, buf_h, x0, hy0, vx1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, hy1);
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},
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0x2570 => {
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fillRect(buf, buf_w, buf_h, vx0, hy0, x1, hy1);
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fillRect(buf, buf_w, buf_h, vx0, 0, vx1, hy1);
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},
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else => return false,
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}
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return true;
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}
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/// Render extended block characters: U+1FB82 (upper quarter block), and the
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/// specific sextant/octant corner characters used by WidgetStyle thick-box borders.
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/// Each character is rendered with the geometric shape that tiles correctly with
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/// its adjacent border characters (▌, ▐, ▀, ▄, 🮂, ▂).
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fn renderExtendedBlocks(
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||||||
|
cp: u21,
|
||||||
|
buf: []u8,
|
||||||
|
buf_w: i32,
|
||||||
|
buf_h: i32,
|
||||||
|
x0: i32,
|
||||||
|
cw: i32,
|
||||||
|
ch: i32,
|
||||||
|
) bool {
|
||||||
|
const x1 = x0 + cw;
|
||||||
|
const mid_x = x0 + @divTrunc(cw, 2);
|
||||||
|
const qh = @divTrunc(ch, 4); // quarter height (for octant thick-box)
|
||||||
|
const th = @divTrunc(ch, 3); // third height (for sextant thick-box)
|
||||||
|
|
||||||
|
switch (cp) {
|
||||||
|
// 🮂 U+1FB82 upper one-quarter block (north edge of octant thick-box)
|
||||||
|
0x1FB82 => fillRect(buf, buf_w, buf_h, x0, 0, x1, qh),
|
||||||
|
|
||||||
|
// Sextant thick-box characters (WidgetStyle "thick box (sextant)")
|
||||||
|
// .n = 🬂, .s = 🬭, .nw = 🬕, .ne = 🬨, .sw = 🬲, .se = 🬷
|
||||||
|
// Edges connect to ▌ (left half) and ▐ (right half) for left/right walls.
|
||||||
|
0x1FB02 => fillRect(buf, buf_w, buf_h, x0, 0, x1, th), // 🬂 top third (N edge)
|
||||||
|
0x1FB2D => fillRect(buf, buf_w, buf_h, x0, ch - th, x1, ch), // 🬭 bottom third (S edge)
|
||||||
|
0x1FB15 => { // 🬕 NW corner: left-half + top-third
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, x1, th);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, th, mid_x, ch);
|
||||||
|
},
|
||||||
|
0x1FB28 => { // 🬨 NE corner: right-half + top-third
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, x1, th);
|
||||||
|
fillRect(buf, buf_w, buf_h, mid_x, th, x1, ch);
|
||||||
|
},
|
||||||
|
0x1FB32 => { // 🬲 SW corner: left-half + bottom-third
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, mid_x, ch - th);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, ch - th, x1, ch);
|
||||||
|
},
|
||||||
|
0x1FB37 => { // 🬷 SE corner: right-half + bottom-third
|
||||||
|
fillRect(buf, buf_w, buf_h, mid_x, 0, x1, ch - th);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, ch - th, x1, ch);
|
||||||
|
},
|
||||||
|
|
||||||
|
// Octant thick-box corner characters (WidgetStyle "thick box (octant)")
|
||||||
|
// .n = 🮂 (qh), .s = ▂ (qh), .w = ▌ (half), .e = ▐ (half)
|
||||||
|
0x1CD4A => { // NW corner: left-half + top-quarter
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, x1, qh);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, qh, mid_x, ch);
|
||||||
|
},
|
||||||
|
0x1CD98 => { // NE corner: right-half + top-quarter
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, x1, qh);
|
||||||
|
fillRect(buf, buf_w, buf_h, mid_x, qh, x1, ch);
|
||||||
|
},
|
||||||
|
0x1CDD5 => { // SE corner: right-half + bottom-quarter
|
||||||
|
fillRect(buf, buf_w, buf_h, mid_x, 0, x1, ch - qh);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, ch - qh, x1, ch);
|
||||||
|
},
|
||||||
|
0x1CDDC => { // SW corner: left-half + bottom-quarter
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, 0, mid_x, ch - qh);
|
||||||
|
fillRect(buf, buf_w, buf_h, x0, ch - qh, x1, ch);
|
||||||
|
},
|
||||||
|
|
||||||
else => return false,
|
else => return false,
|
||||||
}
|
}
|
||||||
return true;
|
return true;
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue