remove png support
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10 changed files with 21 additions and 627 deletions
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@ -29,7 +29,7 @@ repos:
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- id: test
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name: Run zig build test
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entry: zig
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args: ["build", "coverage", "-Dcoverage-threshold=80"]
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args: ["build", "coverage", "-Ddownload-geoip", "-Dcoverage-threshold=80"]
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language: system
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types: [file]
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pass_filenames: false
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@ -2,23 +2,28 @@
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Features not yet implemented in the Zig version:
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## 1. PNG Generation
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- Render weather reports as PNG images
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- Support transparency and custom styling
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- Requires image rendering library integration
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## 2. Language/Localization
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## 1. Language/Localization
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- Accept-Language header parsing
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- lang query parameter support
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- Translation of weather conditions and text (54 languages)
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## 3. Json output
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## 2. Json output
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- Does not match wttr.in format
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## 4. Moon endpoint
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## 3. Moon endpoint
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- `/Moon` and `/Moon@YYYY-MM-DD` endpoints not yet implemented
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- Moon phase calculation is implemented and available in custom format (%m, %M)
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## ~~PNG Generation~~
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- Render weather reports as PNG images
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- Support transparency and custom styling
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This was implemented behind a `-Denable-png` build flag and has been removed. It
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was slow and memory-intensive (a full font stack plus megabyte-scale buffers per
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request), carried its own set of bugs, and saw effectively no use — it did not
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justify its maintenance cost or the dependency surface it pulled in (zigimg,
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freetype via ghostty, and two embedded font packages).
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## ~~Multiple Locations Support~~
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- Handle colon-separated locations (e.g., `London:Paris:Berlin`)
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- Process and display weather for multiple cities in one request
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@ -3,8 +3,8 @@
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*wttr* is a console-oriented weather forecast service written in Zig, based on [wttr.in](https://wttr.in).
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wttr supports various information representation methods like terminal-oriented
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ANSI-sequences for console HTTP clients (curl, httpie, or wget), HTML for web
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browsers, or PNG for graphical viewers.
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ANSI-sequences for console HTTP clients (curl, httpie, or wget), and HTML for
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web browsers.
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## Usage
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40
build.zig
40
build.zig
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@ -8,11 +8,9 @@ pub fn build(b: *std.Build) void {
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const version = GitVersion.getVersion(b, .{});
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const download_geoip = b.option(bool, "download-geoip", "Download GeoIP database for tests") orelse false;
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const enable_png = b.option(bool, "enable-png", "Enable PNG image generation (adds zigimg, freetype, and embedded fonts)") orelse false;
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const build_options = b.addOptions();
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build_options.addOption([]const u8, "version", version);
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build_options.addOption(bool, "download_geoip", download_geoip);
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build_options.addOption(bool, "enable_png", enable_png);
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const httpz = b.dependency("httpz", .{
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.target = target,
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@ -24,22 +22,6 @@ pub fn build(b: *std.Build) void {
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.optimize = optimize,
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});
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const zigimg = if (enable_png) b.dependency("zigimg", .{
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.target = target,
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.optimize = optimize,
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}) else null;
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const freetype = if (enable_png) b.dependency("ghostty", .{
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.target = target,
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.optimize = optimize,
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}).builder.dependency("freetype", .{
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.target = target,
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.optimize = optimize,
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}) else null;
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const jetbrains_mono = if (enable_png) b.dependency("jetbrains_mono", .{}) else null;
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const nerd_fonts = if (enable_png) b.dependency("nerd_fonts_symbols_only", .{}) else null;
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const openflights = b.dependency("openflights", .{});
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const maxminddb_upstream = b.dependency("maxminddb", .{});
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@ -143,36 +125,16 @@ pub fn build(b: *std.Build) void {
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});
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root_module.addImport("httpz", httpz.module("httpz"));
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root_module.addImport("zeit", zeit.module("zeit"));
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if (zigimg) |dep| root_module.addImport("zigimg", dep.module("zigimg"));
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if (freetype) |dep| root_module.addImport("freetype", dep.module("freetype"));
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root_module.addAnonymousImport("airports.dat", .{
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.root_source_file = openflights.path("data/airports.dat"),
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});
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if (jetbrains_mono) |dep| root_module.addAnonymousImport("JetBrainsMono-Regular.ttf", .{
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.root_source_file = dep.path("fonts/ttf/JetBrainsMono-Regular.ttf"),
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});
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if (enable_png) root_module.addAnonymousImport("LexiGulim.ttf", .{
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.root_source_file = b.path("libs/2914-LexiGulim090423.ttf"),
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});
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if (nerd_fonts) |dep| root_module.addAnonymousImport("SymbolsNerdFont-Regular.ttf", .{
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.root_source_file = dep.path("SymbolsNerdFont-Regular.ttf"),
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});
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root_module.addOptions("build_options", build_options);
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root_module.addIncludePath(maxminddb_upstream.path("include"));
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root_module.addIncludePath(b.path("libs/phoon_14Aug2014"));
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root_module.addIncludePath(b.path("libs/sunriset"));
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root_module.addConfigHeader(maxminddb_config);
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var libs_buf: [4]*std.Build.Step.Compile = undefined;
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libs_buf[0] = maxminddb;
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libs_buf[1] = phoon;
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libs_buf[2] = sunriset;
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var libs_len: usize = 3;
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if (freetype) |dep| {
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libs_buf[libs_len] = dep.artifact("freetype");
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libs_len += 1;
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}
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const libs = libs_buf[0..libs_len];
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const libs: []const *std.Build.Step.Compile = &.{ maxminddb, phoon, sunriset };
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const exe = b.addExecutable(.{
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.name = "wttr",
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@ -20,23 +20,6 @@
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},
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.phoon = .{ .path = "libs/phoon_14Aug2014" },
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.sunriset = .{ .path = "libs/sunriset" },
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.ghostty = .{
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.url = "git+https://github.com/ghostty-org/ghostty#ccb08f35f683d6087786dda8e793e911ef1a2f8a",
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.hash = "ghostty-1.3.2-dev-5UdBC9KHOwUAvF5QKNA6pbo-dV0WE-F9l5NtaT0mhpmu",
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},
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.zigimg = .{
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.url = "git+https://github.com/zigimg/zigimg#9714df09f76891323c7fdbbbf23a17b79024fffb",
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.hash = "zigimg-0.1.0-8_eo2j4mFwCU7tWnqvkYtzqe-OPRn_bxEql_IJhW85LT",
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},
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.jetbrains_mono = .{
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.url = "https://deps.files.ghostty.org/JetBrainsMono-2.304.tar.gz",
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.hash = "N-V-__8AAIC5lwAVPJJzxnCAahSvZTIlG-HhtOvnM1uh-66x",
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},
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.nerd_fonts_symbols_only = .{
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.url = "https://deps.files.ghostty.org/NerdFontsSymbolsOnly-3.4.0.tar.gz",
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.hash = "N-V-__8AAMVLTABmYkLqhZPLXnMl-KyN38R8UVYqGrxqO26s",
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.lazy = true,
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},
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},
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.fingerprint = 0x710c2b57e81aa678,
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.minimum_zig_version = "0.16.0",
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Binary file not shown.
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@ -25,9 +25,6 @@ const QueryParams = @This();
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format: ?[]const u8 = null,
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lang: ?[]const u8 = null,
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location: ?[]const u8 = null,
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transparency: ?u8 = null,
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background: ?[]const u8 = null,
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add_frame: bool = false,
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/// A: Ignore user agent and force ansi mode
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ansi: bool = false,
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/// T: Avoid terminal sequences and just output plain text
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@ -61,8 +58,6 @@ pub fn parse(allocator: std.mem.Allocator, query_string: []const u8) !QueryParam
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'Q' => render_options.super_quiet = true,
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'A' => params.ansi = true,
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'T' => params.text_only = true,
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't' => params.transparency = 150,
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'p' => params.add_frame = true,
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else => continue,
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}
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}
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@ -76,12 +71,6 @@ pub fn parse(allocator: std.mem.Allocator, query_string: []const u8) !QueryParam
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params.use_imperial = true;
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} else if (std.mem.eql(u8, key, "use_metric")) {
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params.use_imperial = false;
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} else if (std.mem.eql(u8, key, "transparency")) {
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if (value) |v| {
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params.transparency = try std.fmt.parseInt(u8, v, 10);
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}
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} else if (std.mem.eql(u8, key, "background")) {
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params.background = if (value) |v| try allocator.dupe(u8, v) else null;
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}
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}
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@ -145,16 +134,6 @@ test "parse multiple parameters" {
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try std.testing.expect(!params.use_imperial.?);
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}
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test "parse transparency" {
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const allocator = std.testing.allocator;
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const params_t = try QueryParams.parse(allocator, "t");
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try std.testing.expect(params_t.transparency != null);
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try std.testing.expectEqual(@as(u8, 150), params_t.transparency.?);
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const params_custom = try QueryParams.parse(allocator, "transparency=200");
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try std.testing.expectEqual(@as(u8, 200), params_custom.transparency.?);
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}
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test "imperial units selection logic" {
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// This test documents the priority order for unit selection:
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// 1. Explicit ?u or ?m parameter (highest priority)
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@ -9,10 +9,8 @@ const Json = @import("../render/Json.zig");
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const V2 = @import("../render/V2.zig");
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const Custom = @import("../render/Custom.zig");
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const Prometheus = @import("../render/Prometheus.zig");
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const Png = if (build_options.enable_png) @import("../render/Png.zig") else struct {};
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const help = @import("help.zig");
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const types = @import("../weather/types.zig");
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const build_options = @import("build_options");
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const log = std.log.scoped(.handler);
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@ -41,7 +39,6 @@ pub fn handleWeather(
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defer {
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if (params.format) |f| req.arena.free(f);
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if (params.lang) |l| req.arena.free(l);
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if (params.background) |b| req.arena.free(b);
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}
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if (params.location) |loc| {
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@ -103,23 +100,16 @@ fn handleWeatherInternal(
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// stays free of I/O.
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const now_unix_s = std.Io.Timestamp.now(opts.io, .real).toSeconds();
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// Check for PNG request
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const is_png = if (comptime build_options.enable_png)
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std.mem.endsWith(u8, location_query, ".png")
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else
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false;
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const location_str = if (is_png) location_query[0 .. location_query.len - 4] else location_query;
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// Resolve location. By the time we get here, we really
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// should have a location from the path, query string, or
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// client IP lookup. So if we have an empty location parameter, it
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// is better to 404 than to fake it with a London response
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if (location_str.len == 0) {
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if (location_query.len == 0) {
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res.status = 404;
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res.body = "Location not found\n";
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return;
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}
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const location = opts.resolver.resolve(location_str) catch |err| {
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const location = opts.resolver.resolve(location_query) catch |err| {
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switch (err) {
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error.LocationNotFound => {
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log.debug("Location not found for query {s}", .{location_query});
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@ -153,7 +143,6 @@ fn handleWeatherInternal(
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defer {
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if (params.format) |f| req_alloc.free(f);
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if (params.lang) |l| req_alloc.free(l);
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if (params.background) |b| req_alloc.free(b);
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}
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var render_options = params.render_options;
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@ -177,31 +166,6 @@ fn handleWeatherInternal(
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res.headers.add("X-Location-Coordinates", coords_header);
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// Render weather data
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if (comptime build_options.enable_png) {
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if (is_png) {
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res.content_type = .PNG;
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var png_renderer = Png.init(req_alloc);
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defer png_renderer.deinit();
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var png_buffer: [1024 * 1024]u8 = undefined;
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var png_writer_impl = std.Io.Writer.fixed(&png_buffer);
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const png_writer = &png_writer_impl;
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render_options.format = .ansi; // Force ANSI for PNG
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try renderWeatherData(png_writer, weather, params, render_options, now_unix_s);
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const text_output = png_buffer[0..png_writer_impl.end];
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try png_renderer.buffer.appendSlice(req_alloc, text_output);
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const png_options = Png.PngOptions{
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.transparency = params.transparency orelse 150,
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.background = params.background,
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.add_frame = params.add_frame,
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};
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try png_renderer.render(res.writer(), png_options);
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return;
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}
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}
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// Set content type based on format
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if (params.format) |fmt| {
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res.content_type = if (std.mem.eql(u8, fmt, "j1")) .JSON else .TEXT;
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@ -75,20 +75,10 @@ pub const help_page =
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\\ %s # sunset time
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\\ %d # dusk time
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\\
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\\PNG options:
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\\
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\\ /paris.png # generate a PNG file
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\\ p # add frame around the output
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\\ t # transparency 150
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\\ transparency=... # transparency from 0 to 255 (255 = not transparent)
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\\ background=... # background color in form RRGGBB, e.g. 00aaaa
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\\
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\\Options can be combined:
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\\
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\\ /Paris?0pq
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\\ /Paris?0pq&lang=fr
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\\ /Paris_0pq.png # in PNG the file mode are specified after _
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\\ /Rome_0pq_lang=it.png # long options are separated with underscore
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\\ /Paris?0q
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\\ /Paris?0q&lang=fr
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\\
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\\* Localization:
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\\
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@ -1,489 +0,0 @@
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const std = @import("std");
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const zigimg = @import("zigimg");
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const freetype = @import("freetype");
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const Png = @This();
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allocator: std.mem.Allocator,
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buffer: std.ArrayList(u8),
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pub const PngOptions = struct {
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transparency: u8 = 150,
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background: ?[]const u8 = null,
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add_frame: bool = false,
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};
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const Color = struct {
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r: u8,
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g: u8,
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b: u8,
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a: u8,
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};
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const CHAR_WIDTH = 8;
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const CHAR_HEIGHT = 14;
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const FRAME_PADDING = 10;
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const FRAME_BORDER = 2;
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pub fn init(allocator: std.mem.Allocator) Png {
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return .{
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.allocator = allocator,
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.buffer = .{},
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};
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}
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pub fn deinit(self: *Png) void {
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self.buffer.deinit(self.allocator);
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}
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pub fn writer(self: *Png) std.ArrayList(u8).Writer {
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return self.buffer.writer(self.allocator);
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}
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pub fn render(self: *Png, output: *std.Io.Writer, options: PngOptions) !void {
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// Parse ANSI text to get dimensions and content
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var parsed = try parseAnsiText(self.allocator, self.buffer.items);
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defer parsed.deinit();
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if (parsed.lines.items.len == 0) {
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return error.NoTextToRender;
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}
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// Calculate image dimensions
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const content_width: u32 = @intCast(parsed.max_width * CHAR_WIDTH);
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const content_height: u32 = @intCast(parsed.lines.items.len * CHAR_HEIGHT);
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std.debug.print("PNG: max_width={}, lines={}, content={}x{}\n", .{ parsed.max_width, parsed.lines.items.len, content_width, content_height });
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const padding: u32 = if (options.add_frame) FRAME_PADDING else 0;
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const border: u32 = if (options.add_frame) FRAME_BORDER else 0;
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const total_padding = padding + border;
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const img_width = content_width + (total_padding * 2);
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const img_height = content_height + (total_padding * 2);
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// Parse background color - default to black (matching legacy wttr.in)
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const bg_color = if (options.background) |bg|
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try parseColor(bg, 255) // Opaque if background color specified
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else
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Color{ .r = 0, .g = 0, .b = 0, .a = 255 }; // Black background by default
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// Initialize FreeType
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var ft_lib = try freetype.Library.init();
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defer ft_lib.deinit();
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// Load fonts
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const mono_font_data = @embedFile("LexiGulim.ttf");
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const symbol_font_data = @embedFile("SymbolsNerdFont-Regular.ttf");
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var mono_face = try ft_lib.initMemoryFace(mono_font_data, 0);
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defer mono_face.deinit();
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var symbol_face = try ft_lib.initMemoryFace(symbol_font_data, 0);
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defer symbol_face.deinit();
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try mono_face.setCharSize(0, 13 * 64, 0, 0);
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try symbol_face.setCharSize(0, 13 * 64, 0, 0);
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// Create image buffer
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var image = try zigimg.Image.create(self.allocator, img_width, img_height, .rgba32);
|
||||
defer image.deinit(self.allocator);
|
||||
|
||||
// Fill background
|
||||
fillBackground(&image, bg_color);
|
||||
|
||||
// Draw frame if requested
|
||||
if (options.add_frame) {
|
||||
drawFrame(&image, border);
|
||||
}
|
||||
|
||||
// Render text
|
||||
const x_offset = total_padding;
|
||||
const y_offset = total_padding;
|
||||
|
||||
for (parsed.lines.items, 0..) |line, row| {
|
||||
for (line.chars.items, 0..) |char_info, col| {
|
||||
const x = x_offset + @as(u32, @intCast(col)) * CHAR_WIDTH;
|
||||
const y = y_offset + @as(u32, @intCast(row)) * CHAR_HEIGHT;
|
||||
|
||||
const face = if (isSymbol(char_info.codepoint)) &symbol_face else &mono_face;
|
||||
try renderChar(
|
||||
&image,
|
||||
face,
|
||||
char_info.codepoint,
|
||||
x,
|
||||
y,
|
||||
char_info.fg_color,
|
||||
char_info.bg_color,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
// Encode to PNG
|
||||
var write_buffer: [1024 * 1024]u8 = undefined;
|
||||
const png_data = try image.writeToMemory(self.allocator, &write_buffer, .{ .png = .{} });
|
||||
try output.writeAll(png_data);
|
||||
}
|
||||
|
||||
const ParsedText = struct {
|
||||
allocator: std.mem.Allocator,
|
||||
lines: std.ArrayList(Line),
|
||||
max_width: usize,
|
||||
|
||||
const Line = struct {
|
||||
chars: std.ArrayList(CharInfo),
|
||||
};
|
||||
|
||||
const CharInfo = struct {
|
||||
codepoint: u21,
|
||||
fg_color: Color,
|
||||
bg_color: Color,
|
||||
};
|
||||
|
||||
fn deinit(self: *ParsedText) void {
|
||||
for (self.lines.items) |*line| {
|
||||
line.chars.deinit(self.allocator);
|
||||
}
|
||||
self.lines.deinit(self.allocator);
|
||||
}
|
||||
};
|
||||
|
||||
fn parseAnsiText(allocator: std.mem.Allocator, text: []const u8) !ParsedText {
|
||||
var result = ParsedText{
|
||||
.allocator = allocator,
|
||||
.lines = .{},
|
||||
.max_width = 0,
|
||||
};
|
||||
|
||||
var current_line = ParsedText.Line{
|
||||
.chars = .{},
|
||||
};
|
||||
|
||||
var fg_color = Color{ .r = 255, .g = 255, .b = 255, .a = 255 }; // white for dark bg
|
||||
var bg_color = Color{ .r = 0, .g = 0, .b = 0, .a = 255 }; // black background
|
||||
|
||||
var i: usize = 0;
|
||||
while (i < text.len) {
|
||||
if (text[i] == '\x1b' and i + 1 < text.len and text[i + 1] == '[') {
|
||||
// ANSI escape sequence
|
||||
const seq_end = std.mem.indexOfScalarPos(u8, text, i, 'm') orelse text.len;
|
||||
const seq = text[i + 2 .. seq_end];
|
||||
|
||||
// Parse color codes
|
||||
var iter = std.mem.splitScalar(u8, seq, ';');
|
||||
var codes: std.ArrayList(u8) = .{};
|
||||
defer codes.deinit(allocator);
|
||||
|
||||
while (iter.next()) |code_str| {
|
||||
const code = std.fmt.parseInt(u8, code_str, 10) catch continue;
|
||||
try codes.append(allocator, code);
|
||||
}
|
||||
|
||||
// Handle 256-color codes: ESC[38;5;Nm or ESC[48;5;Nm
|
||||
if (codes.items.len >= 3 and codes.items[0] == 38 and codes.items[1] == 5) {
|
||||
fg_color = ansi256ToRgb(codes.items[2]);
|
||||
} else if (codes.items.len >= 3 and codes.items[0] == 48 and codes.items[1] == 5) {
|
||||
bg_color = ansi256ToRgb(codes.items[2]);
|
||||
} else {
|
||||
// Basic 16-color codes
|
||||
for (codes.items) |code| {
|
||||
fg_color = parseAnsiColor(code, fg_color);
|
||||
}
|
||||
}
|
||||
|
||||
i = seq_end + 1;
|
||||
} else if (text[i] == '\n') {
|
||||
if (current_line.chars.items.len > result.max_width) {
|
||||
result.max_width = current_line.chars.items.len;
|
||||
}
|
||||
try result.lines.append(allocator, current_line);
|
||||
current_line = ParsedText.Line{
|
||||
.chars = .{},
|
||||
};
|
||||
i += 1;
|
||||
} else {
|
||||
// Regular character
|
||||
const len = std.unicode.utf8ByteSequenceLength(text[i]) catch 1;
|
||||
const codepoint = std.unicode.utf8Decode(text[i .. i + len]) catch '?';
|
||||
|
||||
try current_line.chars.append(allocator, .{
|
||||
.codepoint = codepoint,
|
||||
.fg_color = fg_color,
|
||||
.bg_color = bg_color,
|
||||
});
|
||||
|
||||
i += len;
|
||||
}
|
||||
}
|
||||
|
||||
// Add last line
|
||||
if (current_line.chars.items.len > 0) {
|
||||
if (current_line.chars.items.len > result.max_width) {
|
||||
result.max_width = current_line.chars.items.len;
|
||||
}
|
||||
try result.lines.append(allocator, current_line);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
fn parseAnsiColor(code: u8, current: Color) Color {
|
||||
return switch (code) {
|
||||
0 => Color{ .r = 255, .g = 255, .b = 255, .a = 255 }, // reset to white
|
||||
30 => Color{ .r = 0, .g = 0, .b = 0, .a = 255 }, // black
|
||||
31 => Color{ .r = 205, .g = 49, .b = 49, .a = 255 }, // red
|
||||
32 => Color{ .r = 13, .g = 188, .b = 121, .a = 255 }, // green
|
||||
33 => Color{ .r = 229, .g = 229, .b = 16, .a = 255 }, // yellow
|
||||
34 => Color{ .r = 36, .g = 114, .b = 200, .a = 255 }, // blue
|
||||
35 => Color{ .r = 188, .g = 63, .b = 188, .a = 255 }, // magenta
|
||||
36 => Color{ .r = 17, .g = 168, .b = 205, .a = 255 }, // cyan
|
||||
37 => Color{ .r = 229, .g = 229, .b = 229, .a = 255 }, // white
|
||||
else => current,
|
||||
};
|
||||
}
|
||||
|
||||
fn ansi256ToRgb(code: u8) Color {
|
||||
// ANSI 256 color palette
|
||||
if (code < 16) {
|
||||
// Basic 16 colors
|
||||
return switch (code) {
|
||||
0 => Color{ .r = 0, .g = 0, .b = 0, .a = 255 },
|
||||
1 => Color{ .r = 205, .g = 49, .b = 49, .a = 255 },
|
||||
2 => Color{ .r = 13, .g = 188, .b = 121, .a = 255 },
|
||||
3 => Color{ .r = 229, .g = 229, .b = 16, .a = 255 },
|
||||
4 => Color{ .r = 36, .g = 114, .b = 200, .a = 255 },
|
||||
5 => Color{ .r = 188, .g = 63, .b = 188, .a = 255 },
|
||||
6 => Color{ .r = 17, .g = 168, .b = 205, .a = 255 },
|
||||
7 => Color{ .r = 229, .g = 229, .b = 229, .a = 255 },
|
||||
8 => Color{ .r = 102, .g = 102, .b = 102, .a = 255 },
|
||||
9 => Color{ .r = 241, .g = 76, .b = 76, .a = 255 },
|
||||
10 => Color{ .r = 35, .g = 209, .b = 139, .a = 255 },
|
||||
11 => Color{ .r = 245, .g = 245, .b = 67, .a = 255 },
|
||||
12 => Color{ .r = 59, .g = 142, .b = 234, .a = 255 },
|
||||
13 => Color{ .r = 214, .g = 112, .b = 214, .a = 255 },
|
||||
14 => Color{ .r = 41, .g = 184, .b = 219, .a = 255 },
|
||||
15 => Color{ .r = 255, .g = 255, .b = 255, .a = 255 },
|
||||
else => Color{ .r = 255, .g = 255, .b = 255, .a = 255 },
|
||||
};
|
||||
} else if (code < 232) {
|
||||
// 216 color cube (6x6x6)
|
||||
const idx = code - 16;
|
||||
const r = (idx / 36) % 6;
|
||||
const g = (idx / 6) % 6;
|
||||
const b = idx % 6;
|
||||
return Color{
|
||||
.r = if (r > 0) @as(u8, @intCast(55 + r * 40)) else 0,
|
||||
.g = if (g > 0) @as(u8, @intCast(55 + g * 40)) else 0,
|
||||
.b = if (b > 0) @as(u8, @intCast(55 + b * 40)) else 0,
|
||||
.a = 255,
|
||||
};
|
||||
} else {
|
||||
// Grayscale (24 shades)
|
||||
const gray: u8 = @intCast(8 + (code - 232) * 10);
|
||||
return Color{ .r = gray, .g = gray, .b = gray, .a = 255 };
|
||||
}
|
||||
}
|
||||
|
||||
fn parseColor(hex: []const u8, alpha: u8) !Color {
|
||||
if (hex.len != 6) return error.InvalidColor;
|
||||
|
||||
const r = try std.fmt.parseInt(u8, hex[0..2], 16);
|
||||
const g = try std.fmt.parseInt(u8, hex[2..4], 16);
|
||||
const b = try std.fmt.parseInt(u8, hex[4..6], 16);
|
||||
|
||||
return Color{ .r = r, .g = g, .b = b, .a = alpha };
|
||||
}
|
||||
|
||||
fn fillBackground(image: *zigimg.Image, color: Color) void {
|
||||
const pixels = image.pixels.rgba32;
|
||||
for (pixels) |*pixel| {
|
||||
pixel.* = .{ .r = color.r, .g = color.g, .b = color.b, .a = color.a };
|
||||
}
|
||||
}
|
||||
|
||||
fn drawFrame(image: *zigimg.Image, border_width: u32) void {
|
||||
const pixels = image.pixels.rgba32;
|
||||
const width = image.width;
|
||||
const height = image.height;
|
||||
|
||||
const frame_color = zigimg.color.Rgba32{ .r = 255, .g = 255, .b = 255, .a = 255 };
|
||||
|
||||
// Draw border
|
||||
for (0..height) |y| {
|
||||
for (0..width) |x| {
|
||||
if (x < border_width or x >= width - border_width or
|
||||
y < border_width or y >= height - border_width)
|
||||
{
|
||||
pixels[y * width + x] = frame_color;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn isSymbol(codepoint: u21) bool {
|
||||
// Nerd Fonts symbol ranges
|
||||
return (codepoint >= 0xe000 and codepoint <= 0xf8ff) or // Private Use Area
|
||||
(codepoint >= 0xf0000 and codepoint <= 0xffffd) or // Supplementary Private Use Area-A
|
||||
(codepoint >= 0x100000 and codepoint <= 0x10fffd); // Supplementary Private Use Area-B
|
||||
}
|
||||
|
||||
fn renderChar(
|
||||
image: *zigimg.Image,
|
||||
face: *freetype.Face,
|
||||
codepoint: u21,
|
||||
x: u32,
|
||||
y: u32,
|
||||
fg_color: Color,
|
||||
bg_color: Color,
|
||||
) !void {
|
||||
// Draw background for this character cell first
|
||||
const pixels = image.pixels.rgba32;
|
||||
const width = image.width;
|
||||
|
||||
var dy: u32 = 0;
|
||||
while (dy < CHAR_HEIGHT) : (dy += 1) {
|
||||
var dx: u32 = 0;
|
||||
while (dx < CHAR_WIDTH) : (dx += 1) {
|
||||
const px = x + dx;
|
||||
const py = y + dy;
|
||||
if (px < width and py < image.height) {
|
||||
const idx = py * width + px;
|
||||
pixels[idx] = .{ .r = bg_color.r, .g = bg_color.g, .b = bg_color.b, .a = bg_color.a };
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const glyph_index = face.getCharIndex(codepoint) orelse return;
|
||||
try face.loadGlyph(glyph_index, .{ .render = true });
|
||||
|
||||
const glyph_slot = face.handle.*.glyph;
|
||||
const bitmap = glyph_slot.*.bitmap;
|
||||
|
||||
if (bitmap.width == 0 or bitmap.rows == 0) return;
|
||||
|
||||
const buffer = bitmap.buffer orelse return;
|
||||
|
||||
// Match original wttr.in: y + runeHeight - 3
|
||||
const base_x: i32 = @as(i32, @intCast(x)) + glyph_slot.*.bitmap_left;
|
||||
const base_y: i32 = @as(i32, @intCast(y + CHAR_HEIGHT - 3)) - glyph_slot.*.bitmap_top;
|
||||
|
||||
for (0..bitmap.rows) |row| {
|
||||
for (0..bitmap.width) |col| {
|
||||
const alpha = buffer[row * @as(usize, @intCast(bitmap.pitch)) + col];
|
||||
if (alpha == 0) continue;
|
||||
|
||||
const px: i32 = base_x + @as(i32, @intCast(col));
|
||||
const py: i32 = base_y + @as(i32, @intCast(row));
|
||||
|
||||
if (px < 0 or py < 0 or px >= width or py >= image.height) continue;
|
||||
|
||||
const idx = @as(u32, @intCast(py)) * width + @as(u32, @intCast(px));
|
||||
const bg = pixels[idx];
|
||||
|
||||
// Proper alpha blending: blend foreground with background
|
||||
const alpha_f: u16 = alpha;
|
||||
const alpha_inv = 255 - alpha_f;
|
||||
|
||||
pixels[idx] = .{
|
||||
.r = @intCast((alpha_f * fg_color.r + alpha_inv * bg.r) / 255),
|
||||
.g = @intCast((alpha_f * fg_color.g + alpha_inv * bg.g) / 255),
|
||||
.b = @intCast((alpha_f * fg_color.b + alpha_inv * bg.b) / 255),
|
||||
.a = 255,
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
test "parseColor valid hex" {
|
||||
const color = try parseColor("ff0000", 255);
|
||||
try std.testing.expectEqual(@as(u8, 255), color.r);
|
||||
try std.testing.expectEqual(@as(u8, 0), color.g);
|
||||
try std.testing.expectEqual(@as(u8, 0), color.b);
|
||||
try std.testing.expectEqual(@as(u8, 255), color.a);
|
||||
}
|
||||
|
||||
test "parseColor with transparency" {
|
||||
const color = try parseColor("00ff00", 128);
|
||||
try std.testing.expectEqual(@as(u8, 0), color.r);
|
||||
try std.testing.expectEqual(@as(u8, 255), color.g);
|
||||
try std.testing.expectEqual(@as(u8, 0), color.b);
|
||||
try std.testing.expectEqual(@as(u8, 128), color.a);
|
||||
}
|
||||
|
||||
test "parseColor invalid length" {
|
||||
try std.testing.expectError(error.InvalidColor, parseColor("fff", 255));
|
||||
try std.testing.expectError(error.InvalidColor, parseColor("fffffff", 255));
|
||||
}
|
||||
|
||||
test "parseAnsiText simple text" {
|
||||
const allocator = std.testing.allocator;
|
||||
const text = "Hello";
|
||||
var parsed = try parseAnsiText(allocator, text);
|
||||
defer parsed.deinit();
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 1), parsed.lines.items.len);
|
||||
try std.testing.expectEqual(@as(usize, 5), parsed.lines.items[0].chars.items.len);
|
||||
try std.testing.expectEqual(@as(u21, 'H'), parsed.lines.items[0].chars.items[0].codepoint);
|
||||
}
|
||||
|
||||
test "parseAnsiText with newlines" {
|
||||
const allocator = std.testing.allocator;
|
||||
const text = "Line1\nLine2\nLine3";
|
||||
var parsed = try parseAnsiText(allocator, text);
|
||||
defer parsed.deinit();
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 3), parsed.lines.items.len);
|
||||
try std.testing.expectEqual(@as(usize, 5), parsed.max_width);
|
||||
}
|
||||
|
||||
test "parseAnsiText with color codes" {
|
||||
const allocator = std.testing.allocator;
|
||||
const text = "\x1b[31mRed\x1b[0m";
|
||||
var parsed = try parseAnsiText(allocator, text);
|
||||
defer parsed.deinit();
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 1), parsed.lines.items.len);
|
||||
try std.testing.expectEqual(@as(usize, 3), parsed.lines.items[0].chars.items.len);
|
||||
|
||||
const first_char = parsed.lines.items[0].chars.items[0];
|
||||
try std.testing.expectEqual(@as(u8, 205), first_char.fg_color.r);
|
||||
}
|
||||
|
||||
test "parseAnsiColor codes" {
|
||||
const white = Color{ .r = 255, .g = 255, .b = 255, .a = 255 };
|
||||
|
||||
const red = parseAnsiColor(31, white);
|
||||
try std.testing.expectEqual(@as(u8, 205), red.r);
|
||||
|
||||
const green = parseAnsiColor(32, white);
|
||||
try std.testing.expectEqual(@as(u8, 188), green.g);
|
||||
|
||||
const reset = parseAnsiColor(0, red);
|
||||
try std.testing.expectEqual(@as(u8, 255), reset.r); // Reset to white
|
||||
}
|
||||
|
||||
test "isSymbol detects nerd font ranges" {
|
||||
try std.testing.expect(isSymbol(0xe000));
|
||||
try std.testing.expect(isSymbol(0xf8ff));
|
||||
try std.testing.expect(!isSymbol(0x0041)); // 'A'
|
||||
try std.testing.expect(!isSymbol(0x263a)); // ☺
|
||||
}
|
||||
|
||||
test "init and deinit" {
|
||||
const allocator = std.testing.allocator;
|
||||
var png = init(allocator);
|
||||
defer png.deinit();
|
||||
|
||||
try std.testing.expectEqual(@as(usize, 0), png.buffer.items.len);
|
||||
}
|
||||
|
||||
test "writer captures data" {
|
||||
const allocator = std.testing.allocator;
|
||||
var png = init(allocator);
|
||||
defer png.deinit();
|
||||
|
||||
const w = png.writer();
|
||||
try w.writeAll("test data");
|
||||
|
||||
try std.testing.expectEqualStrings("test data", png.buffer.items);
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue