neurocyte/flow
neurocyte/flow
1
1
Fork 0
Code Issues Pull requests Projects Releases 5 Packages Wiki Activity Actions

feat(gui): M3 - TrueType rasterizer with fontconfig font discovery

Browse source 
Replace the M2 stub rasterizer with a real font rasterizer:

- build.zig.zon: add TrueType as a lazy path dependency
- build.zig: swap stub_rasterizer_mod for truetype_rasterizer_mod; link
  fontconfig + libc on Linux; TrueType dep is lazy (falls back gracefully)
- src/gui/rasterizer/truetype.zig: andrewrk/TrueType rasterizer; loadFont
  uses fontconfig to locate the font file, derives cell dimensions from
  vertical metrics (ascent−descent) and 'M' advance width; render blits the
  A8 glyph bitmap into the caller-provided staging buffer with correct
  baseline placement (ascent_px + off_y) and double-wide support (+cell_w
  x-offset for kind=.right); arena allocator per render call
- src/gui/rasterizer/font_finder.zig: OS dispatcher (Linux only for now)
- src/gui/rasterizer/font_finder/linux.zig: fontconfig C API - FcFontMatch
  resolves a font name pattern to an absolute file path

Requires: libfontconfig-dev  (already present alongside libgl-dev etc.)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
CJ van den Berg 2026-03-29 19:20:06 +02:00
parent 39b482b2e0
commit ae0f62c3bf
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
5 changed files with 173 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

17
build.zig
View file

@ -554,18 +554,29 @@ pub fn build_exe(
const gui_glyph_cache_mod = b.createModule(.{ .root_source_file = b.path("src/gui/GlyphIndexCache.zig") });
const gui_xterm_mod = b.createModule(.{ .root_source_file = b.path("src/gui/xterm.zig") });
const stub_rasterizer_mod = b.createModule(.{
.root_source_file = b.path("src/gui/rasterizer/stub.zig"),
const tt_dep = b.lazyDependency("TrueType", .{
.target = target,
.optimize = optimize_deps,
}) orelse break :blk tui_renderer_mod;
const truetype_rasterizer_mod = b.createModule(.{
.root_source_file = b.path("src/gui/rasterizer/truetype.zig"),
.target = target,
.imports = &.{
.{ .name = "TrueType", .module = tt_dep.module("TrueType") },
.{ .name = "xy", .module = gui_xy_mod },
},
});
if (target.result.os.tag == .linux) {
truetype_rasterizer_mod.linkSystemLibrary("fontconfig", .{});
truetype_rasterizer_mod.link_libc = true;
}
const gpu_mod = b.createModule(.{
.root_source_file = b.path("src/gui/gpu/gpu.zig"),
.imports = &.{
.{ .name = "sokol", .module = sokol_mod },
.{ .name = "rasterizer", .module = stub_rasterizer_mod },
.{ .name = "rasterizer", .module = truetype_rasterizer_mod },
.{ .name = "xy", .module = gui_xy_mod },
.{ .name = "Cell", .module = gui_cell_mod },
.{ .name = "GlyphIndexCache", .module = gui_glyph_cache_mod },