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const std = @import("std");
const assert = std.debug.assert;
const sfnt = @import("sfnt.zig");
/// PostScript Table
///
/// This implementation doesn't parse the
/// extra fields in versions 2.0 and 2.5.
///
/// References:
/// - https://learn.microsoft.com/en-us/typography/opentype/spec/post
///
/// Field names are in camelCase to match names in spec.
pub const Post = extern struct {
version: sfnt.Version16Dot16 align(1),
/// Italic angle in counter-clockwise degrees from the vertical.
/// Zero for upright text, negative for text that leans to the
/// right (forward).
italicAngle: sfnt.Fixed align(1),
/// Suggested y-coordinate of the top of the underline.
underlinePosition: sfnt.FWORD align(1),
/// Suggested values for the underline thickness.
/// In general, the underline thickness should match the thickness of
/// the underscore character (U+005F LOW LINE), and should also match
/// the strikeout thickness, which is specified in the OS/2 table.
underlineThickness: sfnt.FWORD align(1),
/// Set to 0 if the font is proportionally spaced, non-zero if
/// the font is not proportionally spaced (i.e. monospaced).
isFixedPitch: sfnt.uint32 align(1),
/// Minimum memory usage when an OpenType font is downloaded.
minMemType42: sfnt.uint32 align(1),
/// Maximum memory usage when an OpenType font is downloaded.
maxMemType42: sfnt.uint32 align(1),
/// Minimum memory usage when an OpenType
/// font is downloaded as a Type 1 font.
minMemType1: sfnt.uint32 align(1),
/// Maximum memory usage when an OpenType
/// font is downloaded as a Type 1 font.
maxMemType1: sfnt.uint32 align(1),
/// Parse the table from raw data.
pub fn init(data: []const u8) error{EndOfStream}!Post {
var fbs = std.io.fixedBufferStream(data);
const reader = fbs.reader();
return try reader.readStructEndian(Post, .big);
}
};
test "post" {
const testing = std.testing;
const alloc = testing.allocator;
const test_font = @import("../embedded.zig").julia_mono;
const font = try sfnt.SFNT.init(test_font, alloc);
defer font.deinit(alloc);
const table = font.getTable("post").?;
const post = try Post.init(table);
try testing.expectEqualDeep(
Post{
.version = sfnt.Version16Dot16{ .minor = 0, .major = 2 },
.italicAngle = sfnt.Fixed.from(0.0),
.underlinePosition = -200,
.underlineThickness = 100,
.isFixedPitch = 1,
.minMemType42 = 0,
.maxMemType42 = 0,
.minMemType1 = 0,
.maxMemType1 = 0,
},
post,
);
}
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