mirror of
https://github.com/ghostty-org/ghostty.git
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cfedd477b2
For details see comments and FreeType docs @ https://freetype.org/freetype2/docs/reference/ft2-library_setup.html#ft_library https://freetype.org/freetype2/docs/reference/ft2-face_creation.html#ft_face tl;dr: FT_New_Face and FT_Done_Face require the Library to be locked for thread safety, and FT_Load_Glyph and FT_Render_Glyph and friends need the face to be locked for thread safety, since we're sharing faces across threads.
65 lines
1.6 KiB
Zig
65 lines
1.6 KiB
Zig
//! A library represents the shared state that the underlying font
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//! library implementation(s) require per-process.
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const std = @import("std");
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const Allocator = std.mem.Allocator;
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const builtin = @import("builtin");
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const options = @import("main.zig").options;
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const freetype = @import("freetype");
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const font = @import("main.zig");
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/// Library implementation for the compile options.
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pub const Library = switch (options.backend) {
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// Freetype requires a state library
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.freetype,
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.fontconfig_freetype,
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.coretext_freetype,
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=> FreetypeLibrary,
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// Some backends such as CT and Canvas don't have a "library"
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.coretext,
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.coretext_harfbuzz,
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.coretext_noshape,
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.web_canvas,
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=> NoopLibrary,
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};
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pub const FreetypeLibrary = struct {
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lib: freetype.Library,
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alloc: Allocator,
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/// Mutex to be held any time the library is
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/// being used to create or destroy a face.
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mutex: *std.Thread.Mutex,
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pub const InitError = freetype.Error || Allocator.Error;
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pub fn init(alloc: Allocator) InitError!Library {
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const lib = try freetype.Library.init();
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errdefer lib.deinit();
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const mutex = try alloc.create(std.Thread.Mutex);
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mutex.* = .{};
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return Library{ .lib = lib, .alloc = alloc, .mutex = mutex };
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}
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pub fn deinit(self: *Library) void {
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self.alloc.destroy(self.mutex);
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self.lib.deinit();
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}
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};
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pub const NoopLibrary = struct {
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pub const InitError = error{};
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pub fn init(alloc: Allocator) InitError!Library {
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_ = alloc;
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return Library{};
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}
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pub fn deinit(self: *Library) void {
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_ = self;
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}
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};
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