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font: more box glyphs

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This commit is contained in:
Mitchell Hashimoto
2022-11-24 09:31:16 -08:00
parent cb8f55229b
commit fbd5eba11a
1 changed files with 60 additions and 4 deletions
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64
src/font/BoxFont.zig
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@ -55,9 +55,6 @@ pub fn renderGlyph(
) !font.Glyph {
assert(atlas.format == .greyscale);
// TODO: render depending on cp
_ = cp;
// Determine the config for our image buffer. The images we draw
// for boxes are always 8bpp
const format: pixman.FormatCode = .a8;
@ -79,7 +76,7 @@ pub fn renderGlyph(
);
defer _ = img.unref();
self.draw_box_drawings_light_horizontal(img);
try self.draw(img, cp);
// Reserve our region in the atlas and render the glyph to it.
const region = try atlas.reserve(alloc, self.width, self.height);
@ -133,15 +130,74 @@ pub fn renderGlyph(
};
}
fn draw(self: BoxFont, img: *pixman.Image, cp: u32) !void {
switch (cp) {
0x2500 => self.draw_box_drawings_light_horizontal(img),
0x2501 => self.draw_box_drawings_heavy_horizontal(img),
0x2502 => self.draw_box_drawings_light_vertical(img),
0x2503 => self.draw_box_drawings_heavy_vertical(img),
// 0x2504 => self.draw_box_drawings_light_triple_dash_horizontal(img),
// 0x2505 => self.draw_box_drawings_heavy_triple_dash_horizontal(img),
// 0x2506 => self.draw_box_drawings_light_triple_dash_vertical(img),
// 0x2507 => self.draw_box_drawings_heavy_triple_dash_vertical(img),
// 0x2508 => self.draw_box_drawings_light_quadruple_dash_horizontal(img),
// 0x2509 => self.draw_box_drawings_heavy_quadruple_dash_horizontal(img),
// 0x250a => self.draw_box_drawings_light_quadruple_dash_vertical(img),
// 0x250b => self.draw_box_drawings_heavy_quadruple_dash_vertical(img),
// 0x250c => self.draw_box_drawings_light_down_and_right(img),
// 0x250d => self.draw_box_drawings_down_light_and_right_heavy(img),
// 0x250e => self.draw_box_drawings_down_heavy_and_right_light(img),
// 0x250f => self.draw_box_drawings_heavy_down_and_right(img),
else => return error.InvalidCodepoint,
}
}
fn draw_box_drawings_light_horizontal(self: BoxFont, img: *pixman.Image) void {
self.hline_middle(img, .light);
}
fn draw_box_drawings_heavy_horizontal(self: BoxFont, img: *pixman.Image) void {
self.hline_middle(img, .heavy);
}
fn draw_box_drawings_light_vertical(self: BoxFont, img: *pixman.Image) void {
self.vline_middle(img, .light);
}
fn draw_box_drawings_heavy_vertical(self: BoxFont, img: *pixman.Image) void {
self.vline_middle(img, .heavy);
}
fn vline_middle(self: BoxFont, img: *pixman.Image, thickness: Thickness) void {
const thick_px = thickness.height(self.thickness);
self.vline(img, 0, self.height, (self.width - thick_px) / 2, thick_px);
}
fn hline_middle(self: BoxFont, img: *pixman.Image, thickness: Thickness) void {
const thick_px = thickness.height(self.thickness);
self.hline(img, 0, self.width, (self.height - thick_px) / 2, thick_px);
}
fn vline(
self: BoxFont,
img: *pixman.Image,
y1: u32,
y2: u32,
x: u32,
thickness_px: u32,
) void {
const boxes = &[_]pixman.Box32{
.{
.x1 = @intCast(i32, @min(@max(x, 0), self.width)),
.x2 = @intCast(i32, @min(@max(x + thickness_px, 0), self.width)),
.y1 = @intCast(i32, @min(@max(y1, 0), self.height)),
.y2 = @intCast(i32, @min(@max(y2, 0), self.height)),
},
};
img.fillBoxes(.src, white, boxes) catch {};
}
fn hline(
self: BoxFont,
img: *pixman.Image,