ref: 7b862d8b0b26827d4b3ac55b459002a9e5d8b2e1
parent: 467a840b86b9ef31e44897566f789b78e3d051f8
author: Jacob G-W <jacoblevgw@gmail.com>
date: Sun Jul 16 17:39:47 EDT 2023
add build.sh script until x86_64 backend can compile build.zig
--- a/.gitignore
+++ b/.gitignore
@@ -1,1 +1,2 @@
-test
+zig-*/
+main
--- /dev/null
+++ b/build.sh
@@ -1,0 +1,3 @@
+#!/usr/bin/env bash
+# just a temporary fix until the x86_64 backend supports build.zig
+~/dev/zig/build/debug/bin/zig build-exe examples/main.zig --main-pkg-path . -target x86_64-plan9-none -freference-trace -fsingle-threaded --zig-lib-dir ~/dev/zig/lib
--- /dev/null
+++ b/build.zig
@@ -1,0 +1,36 @@
+const std = @import("std");+
+pub fn build(b: *std.Build) void {+ // Standard target options allows the person running `zig build` to choose
+ // what target to build for. Here we do not override the defaults, which
+ // means any target is allowed, and the default is native. Other options
+ // for restricting supported target set are available.
+ const target = b.standardTargetOptions(.{ .default_target = .{ .os_tag = .plan9 } });+
+ // Standard optimization options allow the person running `zig build` to select
+ // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
+ // set a preferred release mode, allowing the user to decide how to optimize.
+ const optimize = b.standardOptimizeOption(.{});+
+ const lib = b.addStaticLibrary(.{+ .name = "libdraw-zig",
+ // In this case the main source file is merely a path, however, in more
+ // complicated build scripts, this could be a generated file.
+ .root_source_file = .{ .path = "src/libdraw.zig" },+ .target = target,
+ .optimize = optimize,
+ });
+
+ // This declares intent for the library to be installed into the standard
+ // location when the user invokes the "install" step (the default step when
+ // running `zig build`).
+ b.installArtifact(lib);
+
+ const ex = b.addExecutable(.{ .name = "ldz" });+
+ // This creates a build step. It will be visible in the `zig build --help` menu,
+ // and can be selected like this: `zig build test`
+ // This will evaluate the `test` step rather than the default, which is "install".
+ const example = b.step("example", "Run main example");+ example.dependOn(&ex.step);
+}
--- /dev/null
+++ b/examples/main.zig
@@ -1,0 +1,14 @@
+const std = @import("std");+const ld = @import("../src/libdraw.zig");+pub fn main() !void {+ const ally = std.heap.page_allocator;
+ const d = ld.initDraw(ally, null, "bruh") catch |e| {+ std.debug.print("errstr: {s}\n", .{std.os.plan9.errstr()});+ return e;
+ };
+ const screen = d.getScreen();
+ var buf: [128]u8 = undefined;
+ _ = buf;
+ try screen.draw(screen.r, d.white, null, ld.Point.Zero);
+ try d.flushImage(true);
+}
--- a/fbuild.sh
+++ /dev/null
@@ -1,2 +1,0 @@
-#!/usr/bin/env bash
- ~/dev/zig/build/debug/bin/zig build-exe test.zig -target x86_64-plan9-none -fsingle-threaded --zig-lib-dir ~/dev/zig/lib $@
--- /dev/null
+++ b/src/libdraw.zig
@@ -1,0 +1,780 @@
+const std = @import("std");+
+pub fn parseIntSkipPreceedingSpaces(comptime T: type, buf: []const u8) !T {+ var i: u32 = 0;
+ while (buf[i] == ' ') i += 1;
+ const int = try std.fmt.parseInt(T, buf[i..], 10);
+ return int;
+}
+
+pub const Image = struct {+ display: *Display, // display holding data
+ id: u32, // id of system-held Image
+ r: Rectangle, // rectangle in data area, local coords
+ clipr: Rectangle, // clipping region
+ depth: u32, // number of bits per pixel
+ chan: Chan,
+ repl: bool, // flag: data replicates to tile clipr
+ screen: ?*Screen, // 0 if not a window
+ next: ?*Image, // next in list of windows
+ fn allocScreen(image: *Image, fill: *Image, public: bool) !*Screen {+ const d = image.display;
+ if (d != fill.display)
+ return error.ImageAndFillOnDifferentDisplays;
+ var s = try d.ally.create(Screen);
+ errdefer d.ally.destroy(s);
+ if (screenid == 0) {+ screenid = std.os.plan9.getpid();
+ }
+ var id: u32 = 0;
+ var trys: usize = 0;
+ while (trys < 25) : (trys += 1) {+ var bs = try d.bufImage(1 + 4 + 4 + 4 + 1);
+ var a = bs.writer();
+ screenid += 1;
+ id = screenid & 0xffff; // old devdraw bug
+ a.writeByte('A') catch unreachable;+ a.writeIntLittle(u32, id) catch unreachable;
+ a.writeIntLittle(u32, image.id) catch unreachable;
+ a.writeIntLittle(u32, fill.id) catch unreachable;
+ a.writeByte(@intFromBool(public)) catch unreachable;
+ try d.flushImage(false);
+ }
+ s.display = d;
+ s.id = id;
+ s.image = image;
+ s.fill = fill;
+ return s;
+ }
+ pub fn free(self: *Image) !void {+ try Display.freeImage1(self);
+ self.display.ally.destroy(self);
+ }
+ pub fn line(dest: *Image, p0: Point, p1: Point, end0: u32, end1: u32, radius: u32, src: *Image, sp: Point) !void {+ return dest.lineop(p0, p1, end0, end1, radius, src, sp, DrawOp.SoverD);
+ }
+ pub fn lineop(dst: *Image, p0: Point, p1: Point, end0: u32, end1: u32, radius: u32, src: *Image, sp: Point, op: DrawOp) !void {+ const d = dst.display;
+ try d.setDrawOp(op);
+ var bs = try d.bufImage(1 + 4 + 2 * 4 + 2 * 4 + 4 + 4 + 4 + 4 + 2 * 4);
+ var a = bs.writer();
+ a.writeByte('L') catch unreachable;+ a.writeIntLittle(u32, dst.id) catch unreachable;
+ a.writeIntLittle(u32, p0.x) catch unreachable;
+ a.writeIntLittle(u32, p0.y) catch unreachable;
+ a.writeIntLittle(u32, p1.x) catch unreachable;
+ a.writeIntLittle(u32, p1.y) catch unreachable;
+ a.writeIntLittle(u32, end0) catch unreachable;
+ a.writeIntLittle(u32, end1) catch unreachable;
+ a.writeIntLittle(u32, radius) catch unreachable;
+ a.writeIntLittle(u32, src.id) catch unreachable;
+ a.writeIntLittle(u32, sp.x) catch unreachable;
+ a.writeIntLittle(u32, sp.y) catch unreachable;
+ }
+ pub fn draw1(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point, op: DrawOp) !void {+ const d = dst.display;
+ try d.setDrawOp(op);
+
+ var bs = try d.bufImage(1 + 4 + 4 + 4 + 4 * 4 + 2 * 4 + 2 * 4);
+ var a = bs.writer();
+ const s = src orelse d.black;
+ const m = mask orelse d.@"opaque";
+ a.writeByte('d') catch unreachable;+ a.writeIntLittle(u32, dst.id) catch unreachable;
+ a.writeIntLittle(u32, s.id) catch unreachable;
+ a.writeIntLittle(u32, m.id) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(r.min.x))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(r.min.y))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(r.max.x))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(r.max.y))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(p0.x))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(p0.y))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(p1.x))) catch unreachable;
+ a.writeIntLittle(u32, @as(u32, @bitCast(p1.y))) catch unreachable;
+ }
+
+ pub fn draw(dst: *Image, r: Rectangle, src: *Image, mask: ?*Image, p1: Point) !void {+ return draw1(dst, r, src, p1, mask, p1, .soverD);
+ }
+
+ pub fn drawop(dst: *Image, r: Rectangle, src: ?*Image, mask: ?*Image, p1: Point, op: DrawOp) !void {+ return draw1(dst, r, src, p1, mask, p1, op);
+ }
+
+ pub fn gendraw(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point) !void {+ return draw1(dst, r, src, p0, mask, p1, .soverD);
+ }
+
+ pub fn gendrawop(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point, op: DrawOp) !void {+ return draw1(dst, r, src, p0, mask, p1, op);
+ }
+};
+/// Porter-Duff compositing operators
+const DrawOp = enum(u8) {+ pub const Clear = 0;
+
+ pub const SinD = 8;
+ pub const DinS = 4;
+ pub const SoutD = 2;
+ pub const DoutS = 1;
+
+ pub const S = SinD | SoutD;
+ pub const SoverD = SinD | SoutD | DoutS;
+ pub const SatopD = SinD | DoutS;
+ pub const SxorD = SoutD | DoutS;
+
+ pub const D = DinS | DoutS;
+ pub const DoverS = DinS | DoutS | SoutD;
+ pub const DatopS = DinS | SoutD;
+ pub const DxorS = DoutS | SoutD; // == SxorD
+
+ pub const Ncomp = 12;
+
+ sinD = SinD,
+ dinS = DinS,
+ soutD = SoutD,
+ doutS = DoutS,
+
+ s = S,
+ soverD = SoverD,
+ satopD = SatopD,
+ sxorD = SxorD,
+
+ d = D,
+ doverS = DoverS,
+ datopS = DatopS,
+ // dxorS = DxorS, // == SxorD TODO have multiple enum vals with the same name
+
+};
+var screenid: u32 = 0;
+pub const Point = struct {+ x: i32,
+ y: i32,
+ pub const Zero: Point = .{ .x = 0, .y = 0 };+};
+pub const Rectangle = struct {+ min: Point,
+ max: Point,
+ pub const Zero: Rectangle = .{ .min = Point.Zero, .max = Point.Zero };+ pub fn init(min_x: i32, min_y: i32, max_x: i32, max_y: i32) Rectangle {+ return .{+ .min = .{+ .x = min_x,
+ .y = min_y,
+ },
+ .max = .{+ .x = max_x,
+ .y = max_y,
+ },
+ };
+ }
+ pub fn isBad(self: Rectangle) bool {+ const x = self.dX();
+ const y = self.dY();
+ if (x > 0 and y > 0) {+ const z = x * y;
+ if (@divFloor(z, x) == y and z < 0x10000000) return false;
+ }
+ return true;
+ }
+ pub fn dX(self: Rectangle) i64 {+ return self.max.x - self.min.x;
+ }
+ pub fn dY(self: Rectangle) i64 {+ return self.max.y - self.min.y;
+ }
+ pub fn inset(self: Rectangle, n: i32) Rectangle {+ var r = self;
+ r.min.x += n;
+ r.min.y += n;
+ r.max.x -= n;
+ r.max.y -= n;
+ return r;
+ }
+};
+pub const Screen = struct {+ display: *Display, // display holding data
+ id: u32, // id of system-held Screen
+ image: *Image, // unused; for reference only
+ fill: *Image, // color to paint behind windows
+ fn free(self: *Screen) !void {+ const d = self.display;
+ try d.freeRemote(self.id, .screen);
+ d.ally.destroy(self);
+ }
+};
+pub const Display = struct {+ ally: std.mem.Allocator,
+ qlock: void, // some sort of mutex???
+ locking: bool, // program is using lockdisplay
+ dirno: u32, // the window id
+ fd: std.fs.File,
+ reffd: std.fs.File,
+ ctlfd: std.fs.File,
+ imageid: u32 = 0,
+ local: u32,
+ @"error": void, // void (*error)(Display*, char*);
+ devdir: []const u8 = "/dev",
+ windir: []const u8 = "/dev",
+ oldlabel: [64]u8,
+ dataqid: u64,
+ white: *Image,
+ black: *Image,
+ @"opaque": *Image,
+ transparent: *Image,
+ image: ?*Image,
+ buf: []u8,
+ bufsize: u32,
+ bufp: [*]u8,
+ defaultfont: void, // TODO deal with this
+ subfont: void, // TODO deal with this
+ windows: ?*Image,
+ screenimage: ?*Image,
+ _isnewdisplay: bool,
+ screen: ?*Image = null,
+ _screen: ?*Screen = null,
+ pub fn init(ally: std.mem.Allocator, options: struct { devdir: []const u8 = "/dev", windir: []const u8 = "/dev" }) !*Display {+ const NINFO = 12 * 12;
+ var info: [NINFO + 1]u8 = undefined;
+ var buf: [512]u8 = undefined;
+ var image: ?*Image = null;
+ const ctlfd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/new", .{options.devdir}), .{ .mode = .read_write });+ errdefer ctlfd.close();
+ var n = try ctlfd.read(&info);
+ if (n < 12) {+ return error.InvalidReadFromDrawCtl;
+ }
+ if (n == NINFO + 1) n = NINFO;
+ info[n] = 0;
+ const infoslice = info[0..n];
+ var isnew: bool = false;
+ if (n < NINFO) isnew = true;
+ const winnum = try parseIntSkipPreceedingSpaces(u32, infoslice[0 .. 1 * 12 - 1]);
+ const datafd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/{d}/data", .{ options.devdir, winnum }), .{ .mode = .read_write });+ errdefer datafd.close();
+ const reffd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/{d}/refresh", .{ options.devdir, winnum }), .{});+ errdefer reffd.close();
+ const disp = try ally.create(Display);
+ disp.ally = ally;
+ if (n >= NINFO) {+ image = try ally.create(Image);
+ errdefer ally.destroy(image.?);
+
+ const chan = Chan.fromString(infoslice[2 * 12 .. 3 * 12 - 1]);
+ image.?.* = .{+ .display = disp,
+ .id = 0,
+ .chan = chan,
+ .depth = chan.depth(),
+ .repl = try parseIntSkipPreceedingSpaces(u32, infoslice[3 * 12 .. 4 * 12 - 1]) != 0,
+ .r = .{+ .min = .{+ .x = try parseIntSkipPreceedingSpaces(i32, infoslice[4 * 12 .. 5 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, infoslice[5 * 12 .. 6 * 12 - 1]),
+ },
+ .max = .{+ .x = try parseIntSkipPreceedingSpaces(i32, infoslice[6 * 12 .. 7 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, infoslice[7 * 12 .. 8 * 12 - 1]),
+ },
+ },
+ .clipr = .{+ .min = .{+ .x = try parseIntSkipPreceedingSpaces(i32, infoslice[8 * 12 .. 9 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, infoslice[9 * 12 .. 10 * 12 - 1]),
+ },
+ .max = .{+ .x = try parseIntSkipPreceedingSpaces(i32, infoslice[10 * 12 .. 11 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, infoslice[11 * 12 .. 12 * 12 - 1]),
+ },
+ },
+ .screen = null,
+ .next = null,
+ };
+ }
+ // TODO refactor this into a disp.* = .{ ... } expression+ const bufsize_iounit = iounit(datafd);
+ const bufsz = if (bufsize_iounit == 0) 8000 else if (disp.bufsize < 512) return error.IounitTooSmall else bufsize_iounit;
+ disp.* = .{+ .ally = ally,
+ .dirno = winnum,
+ .fd = datafd,
+ .reffd = reffd,
+ .ctlfd = ctlfd,
+ .imageid = 0,
+ .local = 0,
+ .devdir = options.devdir,
+ .windir = options.windir,
+ .oldlabel = .{0} ** 64,+ .dataqid = 0,
+ .white = undefined, // filled in later
+ .black = undefined, // filled in later
+ .@"opaque" = undefined, // filled in later
+ .transparent = undefined, // filled in later
+ .buf = undefined, // filled in later
+ .bufsize = bufsz,
+ .bufp = undefined, // filled in later
+ .windows = null,
+ .screenimage = null,
+ ._isnewdisplay = isnew,
+ .qlock = {}, // TODO make this an actual lock+ .locking = false,
+ .@"error" = {}, // TODO audit if we need this+ .image = image,
+ .defaultfont = {},+ .subfont = {},+ };
+ disp.buf = try ally.alloc(u8, bufsz + 5); // +5 for flush message;
+ errdefer ally.free(disp.buf);
+ disp.bufp = disp.buf.ptr;
+ disp.white = try disp.allocImage(Rectangle.init(0, 0, 1, 1), .grey1, true, DColor.White);
+ disp.black = try disp.allocImage(Rectangle.init(0, 0, 1, 1), .grey1, true, DColor.Black);
+ // disp.error = error;
+ disp.windir = try ally.dupe(u8, options.windir);
+ errdefer ally.free(disp.windir);
+ disp.devdir = try ally.dupe(u8, options.devdir);
+ errdefer ally.free(disp.devdir);
+ // qlock(&disp.qlock)
+ disp.@"opaque" = disp.white;
+ disp.transparent = disp.black;
+ return disp;
+ }
+ pub fn allocImage(self: *Display, r: Rectangle, chan: Chan, repl: bool, col: u32) !*Image {+ return self._allocImage(null, r, chan, repl, col, 0, .backup);
+ }
+ fn _allocImage(self: *Display, ai: ?*Image, r: Rectangle, chan: Chan, repl: bool, col: u32, _screenid: u32, refresh: Refresh) !*Image {+ if (r.isBad()) {+ return error.BadRect;
+ }
+ if (@intFromEnum(chan) == 0) {+ return error.BadChanDesc;
+ }
+ const depth = chan.depth();
+ if (depth == 0) {+ return error.BadChanDesc;
+ }
+ var bs = try self.bufImage(1 + 4 + 4 + 1 + 4 + 1 + 4 * 4 + 4 * 4 + 4);
+ var a = bs.writer();
+ self.imageid += 1;
+ const id = self.imageid;
+ // start writing the protocol
+ // everything is little endian
+ a.writeByte('b') catch unreachable;+ a.writeIntLittle(u32, id) catch unreachable;
+ a.writeIntLittle(u32, _screenid) catch unreachable;
+ a.writeByte(@intFromEnum(refresh)) catch unreachable;
+ a.writeIntLittle(u32, @intFromEnum(chan)) catch unreachable;
+ a.writeByte(@intFromBool(repl)) catch unreachable;
+ a.writeIntLittle(i32, r.min.x) catch unreachable;
+ a.writeIntLittle(i32, r.min.y) catch unreachable;
+ a.writeIntLittle(i32, r.max.x) catch unreachable;
+ a.writeIntLittle(i32, r.max.y) catch unreachable;
+ const clipr = if (!repl)
+ Rectangle.init(-0x3FFFFFFF, -0x3FFFFFFF, 0x3FFFFFFF, 0x3FFFFFFF)
+ else
+ r;
+ a.writeIntLittle(i32, clipr.min.x) catch unreachable;
+ a.writeIntLittle(i32, clipr.min.y) catch unreachable;
+ a.writeIntLittle(i32, clipr.max.x) catch unreachable;
+ a.writeIntLittle(i32, clipr.max.y) catch unreachable;
+ a.writeIntLittle(u32, col) catch unreachable;
+ var i: *Image = undefined;
+ if (ai) |image| {+ i = image;
+ } else {+ i = self.ally.create(Image) catch {+ try self.freeRemote(id, .image);
+ return error.OutOfMemory;
+ };
+ errdefer self.ally.destroy(i);
+ }
+ i.* = .{ .display = self, .id = id, .depth = depth, .chan = chan, .r = r, .clipr = clipr, .repl = repl, .screen = null, .next = null };+ return i;
+ }
+ pub fn namedImage(self: *Display, name: []const u8) !*Image {+ if (name.len > 256) {+ return error.ImageNameTooLong;
+ }
+ self.flushImage(false) catch {};+ var bs = try self.bufImage(1 + 4 + 1 + name.len);
+ var a = bs.writer();
+ self.imageid += 1;
+ const id = self.imageid;
+ a.writeByte('n') catch unreachable;+ a.writeIntLittle(u32, id) catch unreachable;
+ a.writeByte(@intCast(name.len)) catch unreachable;
+ a.writeAll(name) catch unreachable;
+ try self.flushImage(false);
+ var buf: [12 * 12 + 1]u8 = undefined;
+ if (try self.ctlfd.pread(&buf, 0) < 12 * 12) {+ return error.CtlReadTooShort;
+ }
+ buf[12 * 12] = 0;
+ var i = self.ally.create(Image) catch {+ try self.freeRemote(id, .image);
+ try self.flushImage(false);
+ return error.OutOfMemory;
+ };
+ errdefer self.ally.destroy(i);
+ const chan = Chan.fromString(buf[2 * 12 .. 3 * 12 - 1]);
+ i.* = .{+ .display = self,
+ .id = id,
+ .chan = chan,
+ .depth = chan.depth(),
+ .repl = try parseIntSkipPreceedingSpaces(u32, buf[3 * 12 .. 4 * 12 - 1]) != 0,
+ .r = .{+ .min = .{+ .x = try parseIntSkipPreceedingSpaces(i32, buf[4 * 12 .. 5 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, buf[5 * 12 .. 6 * 12 - 1]),
+ },
+ .max = .{+ .x = try parseIntSkipPreceedingSpaces(i32, buf[6 * 12 .. 7 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, buf[7 * 12 .. 8 * 12 - 1]),
+ },
+ },
+ .clipr = .{+ .min = .{+ .x = try parseIntSkipPreceedingSpaces(i32, buf[8 * 12 .. 9 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, buf[9 * 12 .. 10 * 12 - 1]),
+ },
+ .max = .{+ .x = try parseIntSkipPreceedingSpaces(i32, buf[10 * 12 .. 11 * 12 - 1]),
+ .y = try parseIntSkipPreceedingSpaces(i32, buf[11 * 12 .. 12 * 12 - 1]),
+ },
+ },
+ .screen = null,
+ .next = null,
+ };
+ return i;
+ }
+ fn _allocWindow(self: *Display, i: ?*Image, s: *Screen, r: Rectangle, ref: Refresh, col: u32) !*Image {+ var im = try self._allocImage(i, r, self.screenimage.?.chan, false, col, s.id, ref);
+ im.screen = s;
+ im.next = self.windows;
+ self.windows = im;
+ return im;
+ }
+ fn freeRemote(self: *Display, id: u32, t: enum { image, screen }) !void {+ var bs = try self.bufImage(1 + 4);
+ const a = bs.writer();
+ const c: u8 = if (t == .image) 'f' else 'F';
+ a.writeByte(c) catch unreachable;
+ a.writeIntLittle(u32, id) catch unreachable;
+ }
+ fn freeImage1(image: *Image) !void {+ const d = image.display;
+ if (image.screen != null) {+ var w: ?*Image = d.windows;
+ if (w.? == image) {+ d.windows = image.next;
+ } else {+ while (w != null) {+ if (w.?.next == image) {+ w.?.next = image.next;
+ break;
+ }
+ w = w.?.next;
+ }
+ }
+ }
+ try d.freeRemote(image.id, .image);
+ }
+ pub fn bufImage(self: *Display, n: usize) !std.io.FixedBufferStream([]u8) {+ if (n > self.bufsize) {+ return error.BadCountBufSize;
+ }
+ if (@intFromPtr(self.bufp + n) > @intFromPtr(self.buf.ptr + self.bufsize)) {+ try self.flush();
+ }
+ const p = self.bufp;
+ self.bufp += n;
+ return std.io.fixedBufferStream(p[0..n]);
+ }
+ pub fn flush(self: *Display) !void {+ const n: i64 = @intCast(@intFromPtr(self.bufp) - @intFromPtr(self.buf.ptr));
+ if (n <= 0) return error.UnableToFlushInvalidN;
+ // std.debug.print("about to flush: {}\n{s}\n", .{ std.fmt.fmtSliceHexLower(self.buf[0..@intCast(n)]), self.buf[0..@intCast(n)] });+ if ((self.fd.write(self.buf[0..@intCast(n)]) catch return error.UnableToFlushWrite) != n) {+ self.bufp = self.buf.ptr; // might as well; chance of continuing
+ return error.UnableToFlushN;
+ }
+ self.bufp = self.buf.ptr;
+ }
+ pub fn flushImage(self: *Display, visible: bool) !void {+ if (visible) {+ self.bufp[0] = 'v';
+ self.bufp += 1;
+ if (self._isnewdisplay) {+ std.mem.writeIntLittle(u32, self.bufp[0..4], self.screenimage.?.id);
+ }
+ }
+ return self.flush();
+ }
+ pub fn genGetWindow(self: *Display, winname: []const u8, winp: *?*Image, scrp: *?*Screen, ref: Refresh) !void {+ var buf: [64 + 1]u8 = undefined;
+ var obuf: [64 + 1]u8 = undefined;
+ var image: ?*Image = null;
+ obuf[0] = 0;
+ while (true) {+ const fd = std.fs.openFileAbsolute(winname, .{}) catch {+ std.mem.copyForwards(u8, &buf, "noborder");
+ image = self.image;
+ break;
+ };
+ var n: ?usize = fd.read(buf[0..64]) catch null;
+ if (n == 0) n = null; // TODO do I need this?
+ if (n == null) {+ fd.close();
+ std.mem.copyForwards(u8, &buf, "noborder");
+ image = self.image;
+ break;
+ }
+ // we correctly read in to buf
+ fd.close();
+ image = self.namedImage(buf[0..n.?]) catch |err| {+ std.debug.print("namedImage: {}\n", .{err});+ if (!std.mem.eql(u8, buf[0..n.?], obuf[0..n.?])) {+ std.debug.print("trying to fix the race\n", .{});+ std.mem.copyForwards(u8, obuf[0..n.?], buf[0..n.?]);
+ continue;
+ }
+ break;
+ };
+ break;
+ }
+ if (winp.*) |i| {+ try freeImage1(i);
+ if (scrp.*.?.image != self.image)
+ try scrp.*.?.image.free();
+ try scrp.*.?.free();
+ scrp.* = null;
+ }
+ if (image == null) {+ winp.* = null;
+ self.screenimage = null;
+ return error.CouldNotGetImage; // TODO audit this error
+ }
+ self.screenimage = image.?;
+ scrp.* = image.?.allocScreen(self.white, false) catch |err| {+ winp.* = null;
+ self.screenimage = null;
+ if (image != self.image) {+ if (image) |i| try i.free();
+ }
+ return err;
+ };
+ const i = image.?;
+ var r = i.r;
+ if (!std.mem.eql(u8, buf[0..8], "noborder")) {+ r = r.inset(Borderwidth);
+ }
+ winp.* = self._allocWindow(winp.*, scrp.*.?, r, ref, DColor.White) catch |err| {+ std.debug.print("could not alloc window {}\n", .{err});+ try scrp.*.?.free();
+ scrp.* = null;
+ self.screenimage = null;
+ if (image != self.image)
+ if (image) |im|
+ try im.free();
+ return err;
+ };
+ self.screenimage = winp.*;
+ }
+ pub fn setDrawOp(self: *Display, op: DrawOp) !void {+ if (op != .soverD) {+ var bs = try self.bufImage(1 + 1);
+ var a = bs.writer();
+ a.writeByte('O') catch unreachable;+ a.writeByte(@intFromEnum(op)) catch unreachable;
+ }
+ }
+ // asserts self.screen != null
+ pub fn getScreen(self: Display) *Image {+ return self.screen.?;
+ }
+};
+fn iounit(file: std.fs.File) u32 {+ var buf: [128]u8 = undefined;
+ const f = std.fmt.bufPrint(&buf, "/fd/{d}ctl", .{file.handle}) catch unreachable;+ const cfd = std.fs.openFileAbsolute(f, .{}) catch return 0;+ defer cfd.close();
+ const i = cfd.read(&buf) catch 0;
+ if (i == 0)
+ return 0;
+ const str = buf[0..i];
+ var toks = std.mem.tokenizeSequence(u8, str, " ");
+ var j: usize = 0;
+ // skip the first 7
+ while (j < 7) : (j += 1) _ = toks.next() orelse return 0;
+ const iounit_str = toks.next() orelse return 0;
+ return std.fmt.parseInt(u32, iounit_str, 10) catch return 0;
+}
+pub const Chan = enum(u32) {+ pub const Color = struct {+ const Red = 0;
+ const Green = 1;
+ const Blue = 2;
+ const Grey = 3;
+ const Alpha = 4;
+ const Map = 5;
+ const Ignore = 6;
+ };
+ pub const NChan = 7;
+ grey1 = chan1(Color.Grey, 1),
+ grey2 = chan1(Color.Grey, 2),
+ grey4 = chan1(Color.Grey, 4),
+ grey8 = chan1(Color.Grey, 8),
+ cmap8 = chan1(Color.Map, 8),
+ rgb15 = chan4(Color.Ignore, 1, Color.Red, 5, Color.Green, 5, Color.Blue, 5),
+ rgb16 = chan3(Color.Red, 5, Color.Green, 6, Color.Blue, 5),
+ rgb24 = chan3(Color.Red, 8, Color.Green, 8, Color.Blue, 8),
+ rgba32 = chan4(Color.Red, 8, Color.Green, 8, Color.Blue, 8, Color.Alpha, 8),
+ argb32 = chan4(Color.Alpha, 8, Color.Red, 8, Color.Green, 8, Color.Blue, 8),
+ xrgb32 = chan4(Color.Ignore, 8, Color.Red, 8, Color.Green, 8, Color.Blue, 8),
+ bgr24 = chan3(Color.Blue, 8, Color.Green, 8, Color.Red, 8),
+ abgr32 = chan4(Color.Alpha, 8, Color.Blue, 8, Color.Green, 8, Color.Red, 8),
+ xbgr32 = chan4(Color.Ignore, 8, Color.Blue, 8, Color.Green, 8, Color.Red, 8),
+ _,
+ const channames: []const u8 = "rgbkamx";
+ fn TYPE(self: u32) u32 {+ return (self >> 4) & 15;
+ }
+ fn NBITS(self: u32) u32 {+ return self & 15;
+ }
+ pub fn fromString(str: []const u8) Chan {+ // strip str
+ const spaces: []const u8 = &.{ ' ', '\t', '\r', '\n' };+ const pos = std.mem.indexOfNone(u8, str, spaces).?;
+ const s = str[pos..];
+
+ var d: u32 = 0;
+ var chan: u32 = 0;
+ var i: usize = 0;
+ const chan_ = blk: {+ while (i < s.len) : (i += 2) {+ if (std.ascii.isWhitespace(s[i])) break;
+ if (std.mem.indexOfScalar(u8, channames, s[i])) |ty| {+ const n = std.fmt.parseInt(u8, s[i + 1 .. i + 2], 10) catch break :blk 0;
+ d += n;
+ chan <<= 8;
+ chan |= dc(@intCast(ty), @intCast(n));
+ } else break :blk 0;
+ }
+ if (d == 0 or (d > 8 and d % 8 != 0) or (d < 8 and 8 % d != 0)) break :blk 0;
+ break :blk chan;
+ };
+
+ return @enumFromInt(chan_);
+ }
+ pub fn toString(self: Chan, buf: []u8) ![]const u8 {+ if (self.depth() == 0) {+ return error.ChanDepthIsZero;
+ }
+ var rc: u32 = 0;
+ var c = @intFromEnum(self);
+ while (c != 0) : (c >>= 8) {+ rc <<= 8;
+ rc |= c & 0xff;
+ }
+ var i: usize = 0;
+ c = rc;
+ while (c != 0) : (c >>= 8) {+ buf[i] = channames[TYPE(c)];
+ i += 1;
+ buf[i] = @intCast('0' + NBITS(c));+ i += 1;
+ }
+ return buf[0..i];
+ }
+ pub fn depth(self: Chan) u32 {+ var d: u32 = 0;
+ var c: u32 = @intFromEnum(self);
+ while (c != 0) : (c >>= 8) {+ d += cdepth(c);
+ }
+ if (d == 0 or (d > 8 and d % 8 != 0) or (d < 8 and 8 % d != 0)) return 0;
+ return d;
+ }
+ fn dc(ty: u32, nbit: u32) u32 {+ return ((ty & 15) << 4) | (nbit & 15);
+ }
+ fn cdepth(c: u32) u32 {+ return c & 0xf;
+ }
+ pub fn chan1(a: u32, b: u32) u32 {+ return dc(a, b);
+ }
+ pub fn chan2(a: u32, b: u32, c: u32, d: u32) u32 {+ return chan1(a, b) << 8 | dc(c, d);
+ }
+ pub fn chan3(a: u32, b: u32, c: u32, d: u32, e: u32, f: u32) u32 {+ return chan2(a, b, c, d) << 8 | dc(e, f);
+ }
+ pub fn chan4(a: u32, b: u32, c: u32, d: u32, e: u32, f: u32, g: u32, h: u32) u32 {+ return chan3(a, b, c, d, e, f) << 8 | dc(g, h);
+ }
+};
+pub const DColor = struct {+ pub const Opaque = 0xFFFFFFFF;
+ pub const Transparent = 0x00000000; // only useful for allocimage, memfillcolor
+ pub const Black = 0x000000FF;
+ pub const White = 0xFFFFFFFF;
+ pub const Red = 0xFF0000FF;
+ pub const Green = 0x00FF00FF;
+ pub const Blue = 0x0000FFFF;
+ pub const Cyan = 0x00FFFFFF;
+ pub const Magenta = 0xFF00FFFF;
+ pub const Yellow = 0xFFFF00FF;
+ pub const Paleyellow = 0xFFFFAAFF;
+ pub const Darkyellow = 0xEEEE9EFF;
+ pub const Darkgreen = 0x448844FF;
+ pub const Palegreen = 0xAAFFAAFF;
+ pub const Medgreen = 0x88CC88FF;
+ pub const Darkblue = 0x000055FF;
+ pub const Palebluegreen = 0xAAFFFFFF;
+ pub const Paleblue = 0x0000BBFF;
+ pub const Bluegreen = 0x008888FF;
+ pub const Greygreen = 0x55AAAAFF;
+ pub const Palegreygreen = 0x9EEEEEFF;
+ pub const Yellowgreen = 0x99994CFF;
+ pub const Medblue = 0x000099FF;
+ pub const Greyblue = 0x005DBBFF;
+ pub const Palegreyblue = 0x4993DDFF;
+ pub const Purpleblue = 0x8888CCFF;
+
+ pub const Notacolor = 0xFFFFFF00;
+ pub const Nofill = Notacolor;
+};
+pub const Borderwidth = 4;
+/// Refresh methods
+pub const Refresh = enum(u8) {+ backup = 0,
+ none = 1,
+ mesg = 2,
+};
+pub fn initDraw(ally: std.mem.Allocator, fontname: ?[]const u8, label: ?[]const u8) !*Display {+ return genInitDraw(
+ ally,
+ "/dev",
+ fontname,
+ label,
+ "/dev",
+ .none,
+ );
+}
+pub fn genInitDraw(ally: std.mem.Allocator, devdir: []const u8, fontname: ?[]const u8, label: ?[]const u8, windir: []const u8, ref: Refresh) !*Display {+ var buf: [128]u8 = undefined;
+ var display = try Display.init(ally, .{ .devdir = devdir, .windir = windir });+ // TODO deal with fonts
+ _ = fontname;
+ if (label) |l| blk: {+ const labelfds = std.fmt.bufPrint(&buf, "{s}/label", .{display.windir}) catch break :blk;+ const labelfd = std.fs.openFileAbsolute(labelfds, .{ .mode = .read_write }) catch break :blk;+ defer labelfd.close();
+ _ = try labelfd.write(l);
+ }
+ const winnamefds = std.fmt.bufPrint(&buf, "{s}/winname", .{display.windir}) catch unreachable;+ try display.genGetWindow(winnamefds, &display.screen, &display._screen, ref);
+ return display;
+}
binary files a/t /dev/null differ
--- a/test.zig
+++ /dev/null
@@ -1,792 +1,0 @@
-const std = @import("std");-pub fn main() !void {- const ally = std.heap.page_allocator;
- const d = initDraw(ally, null, "bruh") catch |e| {- std.debug.print("errstr: {s}\n", .{std.os.plan9.errstr()});- return e;
- };
- const screen = d.getScreen();
- var buf: [128]u8 = undefined;
- _ = buf;
- try screen.draw(screen.r, d.white, null, Point.Zero);
- try d.flushImage(true);
-}
-
-pub fn parseIntSkipPreceedingSpaces(comptime T: type, buf: []const u8) !T {- var i: u32 = 0;
- while (buf[i] == ' ') i += 1;
- const int = try std.fmt.parseInt(T, buf[i..], 10);
- return int;
-}
-
-pub const Image = struct {- display: *Display, // display holding data
- id: u32, // id of system-held Image
- r: Rectangle, // rectangle in data area, local coords
- clipr: Rectangle, // clipping region
- depth: u32, // number of bits per pixel
- chan: Chan,
- repl: bool, // flag: data replicates to tile clipr
- screen: ?*Screen, // 0 if not a window
- next: ?*Image, // next in list of windows
- fn allocScreen(image: *Image, fill: *Image, public: bool) !*Screen {- const d = image.display;
- if (d != fill.display)
- return error.ImageAndFillOnDifferentDisplays;
- var s = try d.ally.create(Screen);
- errdefer d.ally.destroy(s);
- if (screenid == 0) {- screenid = std.os.plan9.getpid();
- }
- var id: u32 = 0;
- var trys: usize = 0;
- while (trys < 25) : (trys += 1) {- var bs = try d.bufImage(1 + 4 + 4 + 4 + 1);
- var a = bs.writer();
- screenid += 1;
- id = screenid & 0xffff; // old devdraw bug
- a.writeByte('A') catch unreachable;- a.writeIntLittle(u32, id) catch unreachable;
- a.writeIntLittle(u32, image.id) catch unreachable;
- a.writeIntLittle(u32, fill.id) catch unreachable;
- a.writeByte(@intFromBool(public)) catch unreachable;
- try d.flushImage(false);
- }
- s.display = d;
- s.id = id;
- s.image = image;
- s.fill = fill;
- return s;
- }
- pub fn free(self: *Image) !void {- try Display.freeImage1(self);
- self.display.ally.destroy(self);
- }
- pub fn line(dest: *Image, p0: Point, p1: Point, end0: u32, end1: u32, radius: u32, src: *Image, sp: Point) !void {- return dest.lineop(p0, p1, end0, end1, radius, src, sp, DrawOp.SoverD);
- }
- pub fn lineop(dst: *Image, p0: Point, p1: Point, end0: u32, end1: u32, radius: u32, src: *Image, sp: Point, op: DrawOp) !void {- const d = dst.display;
- try d.setDrawOp(op);
- var bs = try d.bufImage(1 + 4 + 2 * 4 + 2 * 4 + 4 + 4 + 4 + 4 + 2 * 4);
- var a = bs.writer();
- a.writeByte('L') catch unreachable;- a.writeIntLittle(u32, dst.id) catch unreachable;
- a.writeIntLittle(u32, p0.x) catch unreachable;
- a.writeIntLittle(u32, p0.y) catch unreachable;
- a.writeIntLittle(u32, p1.x) catch unreachable;
- a.writeIntLittle(u32, p1.y) catch unreachable;
- a.writeIntLittle(u32, end0) catch unreachable;
- a.writeIntLittle(u32, end1) catch unreachable;
- a.writeIntLittle(u32, radius) catch unreachable;
- a.writeIntLittle(u32, src.id) catch unreachable;
- a.writeIntLittle(u32, sp.x) catch unreachable;
- a.writeIntLittle(u32, sp.y) catch unreachable;
- }
- pub fn draw1(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point, op: DrawOp) !void {- const d = dst.display;
- try d.setDrawOp(op);
-
- var bs = try d.bufImage(1 + 4 + 4 + 4 + 4 * 4 + 2 * 4 + 2 * 4);
- var a = bs.writer();
- const s = src orelse d.black;
- const m = mask orelse d.@"opaque";
- a.writeByte('d') catch unreachable;- a.writeIntLittle(u32, dst.id) catch unreachable;
- a.writeIntLittle(u32, s.id) catch unreachable;
- a.writeIntLittle(u32, m.id) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(r.min.x))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(r.min.y))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(r.max.x))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(r.max.y))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(p0.x))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(p0.y))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(p1.x))) catch unreachable;
- a.writeIntLittle(u32, @as(u32, @bitCast(p1.y))) catch unreachable;
- }
-
- pub fn draw(dst: *Image, r: Rectangle, src: *Image, mask: ?*Image, p1: Point) !void {- return draw1(dst, r, src, p1, mask, p1, .soverD);
- }
-
- pub fn drawop(dst: *Image, r: Rectangle, src: ?*Image, mask: ?*Image, p1: Point, op: DrawOp) !void {- return draw1(dst, r, src, p1, mask, p1, op);
- }
-
- pub fn gendraw(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point) !void {- return draw1(dst, r, src, p0, mask, p1, .soverD);
- }
-
- pub fn gendrawop(dst: *Image, r: Rectangle, src: ?*Image, p0: Point, mask: ?*Image, p1: Point, op: DrawOp) !void {- return draw1(dst, r, src, p0, mask, p1, op);
- }
-};
-/// Porter-Duff compositing operators
-const DrawOp = enum(u8) {- pub const Clear = 0;
-
- pub const SinD = 8;
- pub const DinS = 4;
- pub const SoutD = 2;
- pub const DoutS = 1;
-
- pub const S = SinD | SoutD;
- pub const SoverD = SinD | SoutD | DoutS;
- pub const SatopD = SinD | DoutS;
- pub const SxorD = SoutD | DoutS;
-
- pub const D = DinS | DoutS;
- pub const DoverS = DinS | DoutS | SoutD;
- pub const DatopS = DinS | SoutD;
- pub const DxorS = DoutS | SoutD; // == SxorD
-
- pub const Ncomp = 12;
-
- sinD = SinD,
- dinS = DinS,
- soutD = SoutD,
- doutS = DoutS,
-
- s = S,
- soverD = SoverD,
- satopD = SatopD,
- sxorD = SxorD,
-
- d = D,
- doverS = DoverS,
- datopS = DatopS,
- // dxorS = DxorS, // == SxorD TODO have multiple enum vals with the same name
-
-};
-var screenid: u32 = 0;
-pub const Point = struct {- x: i32,
- y: i32,
- pub const Zero: Point = .{ .x = 0, .y = 0 };-};
-pub const Rectangle = struct {- min: Point,
- max: Point,
- pub const Zero: Rectangle = .{ .min = Point.Zero, .max = Point.Zero };- pub fn init(min_x: i32, min_y: i32, max_x: i32, max_y: i32) Rectangle {- return .{- .min = .{- .x = min_x,
- .y = min_y,
- },
- .max = .{- .x = max_x,
- .y = max_y,
- },
- };
- }
- pub fn isBad(self: Rectangle) bool {- const x = self.dX();
- const y = self.dY();
- if (x > 0 and y > 0) {- const z = x * y;
- if (@divFloor(z, x) == y and z < 0x10000000) return false;
- }
- return true;
- }
- pub fn dX(self: Rectangle) i64 {- return self.max.x - self.min.x;
- }
- pub fn dY(self: Rectangle) i64 {- return self.max.y - self.min.y;
- }
- pub fn inset(self: Rectangle, n: i32) Rectangle {- var r = self;
- r.min.x += n;
- r.min.y += n;
- r.max.x -= n;
- r.max.y -= n;
- return r;
- }
-};
-pub const Screen = struct {- display: *Display, // display holding data
- id: u32, // id of system-held Screen
- image: *Image, // unused; for reference only
- fill: *Image, // color to paint behind windows
- fn free(self: *Screen) !void {- const d = self.display;
- try d.freeRemote(self.id, .screen);
- d.ally.destroy(self);
- }
-};
-pub const Display = struct {- ally: std.mem.Allocator,
- qlock: void, // some sort of mutex???
- locking: bool, // program is using lockdisplay
- dirno: u32, // the window id
- fd: std.fs.File,
- reffd: std.fs.File,
- ctlfd: std.fs.File,
- imageid: u32 = 0,
- local: u32,
- @"error": void, // void (*error)(Display*, char*);
- devdir: []const u8 = "/dev",
- windir: []const u8 = "/dev",
- oldlabel: [64]u8,
- dataqid: u64,
- white: *Image,
- black: *Image,
- @"opaque": *Image,
- transparent: *Image,
- image: ?*Image,
- buf: []u8,
- bufsize: u32,
- bufp: [*]u8,
- defaultfont: void, // TODO deal with this
- subfont: void, // TODO deal with this
- windows: ?*Image,
- screenimage: ?*Image,
- _isnewdisplay: bool,
- screen: ?*Image = null,
- _screen: ?*Screen = null,
- pub fn init(ally: std.mem.Allocator, options: struct { devdir: []const u8 = "/dev", windir: []const u8 = "/dev" }) !*Display {- const NINFO = 12 * 12;
- var info: [NINFO + 1]u8 = undefined;
- var buf: [512]u8 = undefined;
- var image: ?*Image = null;
- const ctlfd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/new", .{options.devdir}), .{ .mode = .read_write });- errdefer ctlfd.close();
- var n = try ctlfd.read(&info);
- if (n < 12) {- return error.InvalidReadFromDrawCtl;
- }
- if (n == NINFO + 1) n = NINFO;
- info[n] = 0;
- const infoslice = info[0..n];
- var isnew: bool = false;
- if (n < NINFO) isnew = true;
- const winnum = try parseIntSkipPreceedingSpaces(u32, infoslice[0 .. 1 * 12 - 1]);
- const datafd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/{d}/data", .{ options.devdir, winnum }), .{ .mode = .read_write });- errdefer datafd.close();
- const reffd = try std.fs.openFileAbsolute(try std.fmt.bufPrint(&buf, "{s}/draw/{d}/refresh", .{ options.devdir, winnum }), .{});- errdefer reffd.close();
- const disp = try ally.create(Display);
- disp.ally = ally;
- if (n >= NINFO) {- image = try ally.create(Image);
- errdefer ally.destroy(image.?);
-
- const chan = Chan.fromString(infoslice[2 * 12 .. 3 * 12 - 1]);
- image.?.* = .{- .display = disp,
- .id = 0,
- .chan = chan,
- .depth = chan.depth(),
- .repl = try parseIntSkipPreceedingSpaces(u32, infoslice[3 * 12 .. 4 * 12 - 1]) != 0,
- .r = .{- .min = .{- .x = try parseIntSkipPreceedingSpaces(i32, infoslice[4 * 12 .. 5 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, infoslice[5 * 12 .. 6 * 12 - 1]),
- },
- .max = .{- .x = try parseIntSkipPreceedingSpaces(i32, infoslice[6 * 12 .. 7 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, infoslice[7 * 12 .. 8 * 12 - 1]),
- },
- },
- .clipr = .{- .min = .{- .x = try parseIntSkipPreceedingSpaces(i32, infoslice[8 * 12 .. 9 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, infoslice[9 * 12 .. 10 * 12 - 1]),
- },
- .max = .{- .x = try parseIntSkipPreceedingSpaces(i32, infoslice[10 * 12 .. 11 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, infoslice[11 * 12 .. 12 * 12 - 1]),
- },
- },
- .screen = null,
- .next = null,
- };
- }
- // TODO refactor this into a disp.* = .{ ... } expression- const bufsize_iounit = iounit(datafd);
- const bufsz = if (bufsize_iounit == 0) 8000 else if (disp.bufsize < 512) return error.IounitTooSmall else bufsize_iounit;
- disp.* = .{- .ally = ally,
- .dirno = winnum,
- .fd = datafd,
- .reffd = reffd,
- .ctlfd = ctlfd,
- .imageid = 0,
- .local = 0,
- .devdir = options.devdir,
- .windir = options.windir,
- .oldlabel = .{0} ** 64,- .dataqid = 0,
- .white = undefined, // filled in later
- .black = undefined, // filled in later
- .@"opaque" = undefined, // filled in later
- .transparent = undefined, // filled in later
- .buf = undefined, // filled in later
- .bufsize = bufsz,
- .bufp = undefined, // filled in later
- .windows = null,
- .screenimage = null,
- ._isnewdisplay = isnew,
- .qlock = {}, // TODO make this an actual lock- .locking = false,
- .@"error" = {}, // TODO audit if we need this- .image = image,
- .defaultfont = {},- .subfont = {},- };
- disp.buf = try ally.alloc(u8, bufsz + 5); // +5 for flush message;
- errdefer ally.free(disp.buf);
- disp.bufp = disp.buf.ptr;
- disp.white = try disp.allocImage(Rectangle.init(0, 0, 1, 1), .grey1, true, DColor.White);
- disp.black = try disp.allocImage(Rectangle.init(0, 0, 1, 1), .grey1, true, DColor.Black);
- // disp.error = error;
- disp.windir = try ally.dupe(u8, options.windir);
- errdefer ally.free(disp.windir);
- disp.devdir = try ally.dupe(u8, options.devdir);
- errdefer ally.free(disp.devdir);
- // qlock(&disp.qlock)
- disp.@"opaque" = disp.white;
- disp.transparent = disp.black;
- return disp;
- }
- pub fn allocImage(self: *Display, r: Rectangle, chan: Chan, repl: bool, col: u32) !*Image {- return self._allocImage(null, r, chan, repl, col, 0, .backup);
- }
- fn _allocImage(self: *Display, ai: ?*Image, r: Rectangle, chan: Chan, repl: bool, col: u32, _screenid: u32, refresh: Refresh) !*Image {- if (r.isBad()) {- return error.BadRect;
- }
- if (@intFromEnum(chan) == 0) {- return error.BadChanDesc;
- }
- const depth = chan.depth();
- if (depth == 0) {- return error.BadChanDesc;
- }
- var bs = try self.bufImage(1 + 4 + 4 + 1 + 4 + 1 + 4 * 4 + 4 * 4 + 4);
- var a = bs.writer();
- self.imageid += 1;
- const id = self.imageid;
- // start writing the protocol
- // everything is little endian
- a.writeByte('b') catch unreachable;- a.writeIntLittle(u32, id) catch unreachable;
- a.writeIntLittle(u32, _screenid) catch unreachable;
- a.writeByte(@intFromEnum(refresh)) catch unreachable;
- a.writeIntLittle(u32, @intFromEnum(chan)) catch unreachable;
- a.writeByte(@intFromBool(repl)) catch unreachable;
- a.writeIntLittle(i32, r.min.x) catch unreachable;
- a.writeIntLittle(i32, r.min.y) catch unreachable;
- a.writeIntLittle(i32, r.max.x) catch unreachable;
- a.writeIntLittle(i32, r.max.y) catch unreachable;
- const clipr = if (!repl)
- Rectangle.init(-0x3FFFFFFF, -0x3FFFFFFF, 0x3FFFFFFF, 0x3FFFFFFF)
- else
- r;
- a.writeIntLittle(i32, clipr.min.x) catch unreachable;
- a.writeIntLittle(i32, clipr.min.y) catch unreachable;
- a.writeIntLittle(i32, clipr.max.x) catch unreachable;
- a.writeIntLittle(i32, clipr.max.y) catch unreachable;
- a.writeIntLittle(u32, col) catch unreachable;
- var i: *Image = undefined;
- if (ai) |image| {- i = image;
- } else {- i = self.ally.create(Image) catch {- try self.freeRemote(id, .image);
- return error.OutOfMemory;
- };
- errdefer self.ally.destroy(i);
- }
- i.* = .{ .display = self, .id = id, .depth = depth, .chan = chan, .r = r, .clipr = clipr, .repl = repl, .screen = null, .next = null };- return i;
- }
- pub fn namedImage(self: *Display, name: []const u8) !*Image {- if (name.len > 256) {- return error.ImageNameTooLong;
- }
- self.flushImage(false) catch {};- var bs = try self.bufImage(1 + 4 + 1 + name.len);
- var a = bs.writer();
- self.imageid += 1;
- const id = self.imageid;
- a.writeByte('n') catch unreachable;- a.writeIntLittle(u32, id) catch unreachable;
- a.writeByte(@intCast(name.len)) catch unreachable;
- a.writeAll(name) catch unreachable;
- try self.flushImage(false);
- var buf: [12 * 12 + 1]u8 = undefined;
- if (try self.ctlfd.pread(&buf, 0) < 12 * 12) {- return error.CtlReadTooShort;
- }
- buf[12 * 12] = 0;
- var i = self.ally.create(Image) catch {- try self.freeRemote(id, .image);
- try self.flushImage(false);
- return error.OutOfMemory;
- };
- errdefer self.ally.destroy(i);
- const chan = Chan.fromString(buf[2 * 12 .. 3 * 12 - 1]);
- i.* = .{- .display = self,
- .id = id,
- .chan = chan,
- .depth = chan.depth(),
- .repl = try parseIntSkipPreceedingSpaces(u32, buf[3 * 12 .. 4 * 12 - 1]) != 0,
- .r = .{- .min = .{- .x = try parseIntSkipPreceedingSpaces(i32, buf[4 * 12 .. 5 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, buf[5 * 12 .. 6 * 12 - 1]),
- },
- .max = .{- .x = try parseIntSkipPreceedingSpaces(i32, buf[6 * 12 .. 7 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, buf[7 * 12 .. 8 * 12 - 1]),
- },
- },
- .clipr = .{- .min = .{- .x = try parseIntSkipPreceedingSpaces(i32, buf[8 * 12 .. 9 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, buf[9 * 12 .. 10 * 12 - 1]),
- },
- .max = .{- .x = try parseIntSkipPreceedingSpaces(i32, buf[10 * 12 .. 11 * 12 - 1]),
- .y = try parseIntSkipPreceedingSpaces(i32, buf[11 * 12 .. 12 * 12 - 1]),
- },
- },
- .screen = null,
- .next = null,
- };
- return i;
- }
- fn _allocWindow(self: *Display, i: ?*Image, s: *Screen, r: Rectangle, ref: Refresh, col: u32) !*Image {- var im = try self._allocImage(i, r, self.screenimage.?.chan, false, col, s.id, ref);
- im.screen = s;
- im.next = self.windows;
- self.windows = im;
- return im;
- }
- fn freeRemote(self: *Display, id: u32, t: enum { image, screen }) !void {- var bs = try self.bufImage(1 + 4);
- const a = bs.writer();
- const c: u8 = if (t == .image) 'f' else 'F';
- a.writeByte(c) catch unreachable;
- a.writeIntLittle(u32, id) catch unreachable;
- }
- fn freeImage1(image: *Image) !void {- const d = image.display;
- if (image.screen != null) {- var w: ?*Image = d.windows;
- if (w.? == image) {- d.windows = image.next;
- } else {- while (w != null) {- if (w.?.next == image) {- w.?.next = image.next;
- break;
- }
- w = w.?.next;
- }
- }
- }
- try d.freeRemote(image.id, .image);
- }
- pub fn bufImage(self: *Display, n: usize) !std.io.FixedBufferStream([]u8) {- if (n > self.bufsize) {- return error.BadCountBufSize;
- }
- if (@intFromPtr(self.bufp + n) > @intFromPtr(self.buf.ptr + self.bufsize)) {- try self.flush();
- }
- const p = self.bufp;
- self.bufp += n;
- return std.io.fixedBufferStream(p[0..n]);
- }
- pub fn flush(self: *Display) !void {- const n: i64 = @intCast(@intFromPtr(self.bufp) - @intFromPtr(self.buf.ptr));
- if (n <= 0) return error.UnableToFlushInvalidN;
- // std.debug.print("about to flush: {}\n{s}\n", .{ std.fmt.fmtSliceHexLower(self.buf[0..@intCast(n)]), self.buf[0..@intCast(n)] });- if ((self.fd.write(self.buf[0..@intCast(n)]) catch return error.UnableToFlushWrite) != n) {- self.bufp = self.buf.ptr; // might as well; chance of continuing
- return error.UnableToFlushN;
- }
- self.bufp = self.buf.ptr;
- }
- pub fn flushImage(self: *Display, visible: bool) !void {- if (visible) {- self.bufp[0] = 'v';
- self.bufp += 1;
- if (self._isnewdisplay) {- std.mem.writeIntLittle(u32, self.bufp[0..4], self.screenimage.?.id);
- }
- }
- return self.flush();
- }
- pub fn genGetWindow(self: *Display, winname: []const u8, winp: *?*Image, scrp: *?*Screen, ref: Refresh) !void {- var buf: [64 + 1]u8 = undefined;
- var obuf: [64 + 1]u8 = undefined;
- var image: ?*Image = null;
- obuf[0] = 0;
- while (true) {- const fd = std.fs.openFileAbsolute(winname, .{}) catch {- std.mem.copyForwards(u8, &buf, "noborder");
- image = self.image;
- break;
- };
- var n: ?usize = fd.read(buf[0..64]) catch null;
- if (n == 0) n = null; // TODO do I need this?
- if (n == null) {- fd.close();
- std.mem.copyForwards(u8, &buf, "noborder");
- image = self.image;
- break;
- }
- // we correctly read in to buf
- fd.close();
- image = self.namedImage(buf[0..n.?]) catch |err| {- std.debug.print("namedImage: {}\n", .{err});- if (!std.mem.eql(u8, buf[0..n.?], obuf[0..n.?])) {- std.debug.print("trying to fix the race\n", .{});- std.mem.copyForwards(u8, obuf[0..n.?], buf[0..n.?]);
- continue;
- }
- break;
- };
- break;
- }
- if (winp.*) |i| {- try freeImage1(i);
- if (scrp.*.?.image != self.image)
- try scrp.*.?.image.free();
- try scrp.*.?.free();
- scrp.* = null;
- }
- if (image == null) {- winp.* = null;
- self.screenimage = null;
- return error.CouldNotGetImage; // TODO audit this error
- }
- self.screenimage = image.?;
- scrp.* = image.?.allocScreen(self.white, false) catch |err| {- winp.* = null;
- self.screenimage = null;
- if (image != self.image) {- if (image) |i| try i.free();
- }
- return err;
- };
- const i = image.?;
- var r = i.r;
- if (!std.mem.eql(u8, buf[0..8], "noborder")) {- r = r.inset(Borderwidth);
- }
- winp.* = self._allocWindow(winp.*, scrp.*.?, r, ref, DColor.White) catch |err| {- std.debug.print("could not alloc window {}\n", .{err});- try scrp.*.?.free();
- scrp.* = null;
- self.screenimage = null;
- if (image != self.image)
- if (image) |im|
- try im.free();
- return err;
- };
- self.screenimage = winp.*;
- }
- pub fn setDrawOp(self: *Display, op: DrawOp) !void {- if (op != .soverD) {- var bs = try self.bufImage(1 + 1);
- var a = bs.writer();
- a.writeByte('O') catch unreachable;- a.writeByte(@intFromEnum(op)) catch unreachable;
- }
- }
- // asserts self.screen != null
- pub fn getScreen(self: Display) *Image {- return self.screen.?;
- }
-};
-fn iounit(file: std.fs.File) u32 {- var buf: [128]u8 = undefined;
- const f = std.fmt.bufPrint(&buf, "/fd/{d}ctl", .{file.handle}) catch unreachable;- const cfd = std.fs.openFileAbsolute(f, .{}) catch return 0;- defer cfd.close();
- const i = cfd.read(&buf) catch 0;
- if (i == 0)
- return 0;
- const str = buf[0..i];
- var toks = std.mem.tokenizeSequence(u8, str, " ");
- var j: usize = 0;
- // skip the first 7
- while (j < 7) : (j += 1) _ = toks.next() orelse return 0;
- const iounit_str = toks.next() orelse return 0;
- return std.fmt.parseInt(u32, iounit_str, 10) catch return 0;
-}
-pub const Chan = enum(u32) {- pub const Color = struct {- const Red = 0;
- const Green = 1;
- const Blue = 2;
- const Grey = 3;
- const Alpha = 4;
- const Map = 5;
- const Ignore = 6;
- };
- pub const NChan = 7;
- grey1 = chan1(Color.Grey, 1),
- grey2 = chan1(Color.Grey, 2),
- grey4 = chan1(Color.Grey, 4),
- grey8 = chan1(Color.Grey, 8),
- cmap8 = chan1(Color.Map, 8),
- rgb15 = chan4(Color.Ignore, 1, Color.Red, 5, Color.Green, 5, Color.Blue, 5),
- rgb16 = chan3(Color.Red, 5, Color.Green, 6, Color.Blue, 5),
- rgb24 = chan3(Color.Red, 8, Color.Green, 8, Color.Blue, 8),
- rgba32 = chan4(Color.Red, 8, Color.Green, 8, Color.Blue, 8, Color.Alpha, 8),
- argb32 = chan4(Color.Alpha, 8, Color.Red, 8, Color.Green, 8, Color.Blue, 8),
- xrgb32 = chan4(Color.Ignore, 8, Color.Red, 8, Color.Green, 8, Color.Blue, 8),
- bgr24 = chan3(Color.Blue, 8, Color.Green, 8, Color.Red, 8),
- abgr32 = chan4(Color.Alpha, 8, Color.Blue, 8, Color.Green, 8, Color.Red, 8),
- xbgr32 = chan4(Color.Ignore, 8, Color.Blue, 8, Color.Green, 8, Color.Red, 8),
- _,
- const channames: []const u8 = "rgbkamx";
- fn TYPE(self: u32) u32 {- return (self >> 4) & 15;
- }
- fn NBITS(self: u32) u32 {- return self & 15;
- }
- pub fn fromString(str: []const u8) Chan {- // strip str
- const spaces: []const u8 = &.{ ' ', '\t', '\r', '\n' };- const pos = std.mem.indexOfNone(u8, str, spaces).?;
- const s = str[pos..];
-
- var d: u32 = 0;
- var chan: u32 = 0;
- var i: usize = 0;
- const chan_ = blk: {- while (i < s.len) : (i += 2) {- if (std.ascii.isWhitespace(s[i])) break;
- if (std.mem.indexOfScalar(u8, channames, s[i])) |ty| {- const n = std.fmt.parseInt(u8, s[i + 1 .. i + 2], 10) catch break :blk 0;
- d += n;
- chan <<= 8;
- chan |= dc(@intCast(ty), @intCast(n));
- } else break :blk 0;
- }
- if (d == 0 or (d > 8 and d % 8 != 0) or (d < 8 and 8 % d != 0)) break :blk 0;
- break :blk chan;
- };
-
- return @enumFromInt(chan_);
- }
- pub fn toString(self: Chan, buf: []u8) ![]const u8 {- if (self.depth() == 0) {- return error.ChanDepthIsZero;
- }
- var rc: u32 = 0;
- var c = @intFromEnum(self);
- while (c != 0) : (c >>= 8) {- rc <<= 8;
- rc |= c & 0xff;
- }
- var i: usize = 0;
- c = rc;
- while (c != 0) : (c >>= 8) {- buf[i] = channames[TYPE(c)];
- i += 1;
- buf[i] = @intCast('0' + NBITS(c));- i += 1;
- }
- return buf[0..i];
- }
- pub fn depth(self: Chan) u32 {- var d: u32 = 0;
- var c: u32 = @intFromEnum(self);
- while (c != 0) : (c >>= 8) {- d += cdepth(c);
- }
- if (d == 0 or (d > 8 and d % 8 != 0) or (d < 8 and 8 % d != 0)) return 0;
- return d;
- }
- fn dc(ty: u32, nbit: u32) u32 {- return ((ty & 15) << 4) | (nbit & 15);
- }
- fn cdepth(c: u32) u32 {- return c & 0xf;
- }
- pub fn chan1(a: u32, b: u32) u32 {- return dc(a, b);
- }
- pub fn chan2(a: u32, b: u32, c: u32, d: u32) u32 {- return chan1(a, b) << 8 | dc(c, d);
- }
- pub fn chan3(a: u32, b: u32, c: u32, d: u32, e: u32, f: u32) u32 {- return chan2(a, b, c, d) << 8 | dc(e, f);
- }
- pub fn chan4(a: u32, b: u32, c: u32, d: u32, e: u32, f: u32, g: u32, h: u32) u32 {- return chan3(a, b, c, d, e, f) << 8 | dc(g, h);
- }
-};
-pub const DColor = struct {- pub const Opaque = 0xFFFFFFFF;
- pub const Transparent = 0x00000000; // only useful for allocimage, memfillcolor
- pub const Black = 0x000000FF;
- pub const White = 0xFFFFFFFF;
- pub const Red = 0xFF0000FF;
- pub const Green = 0x00FF00FF;
- pub const Blue = 0x0000FFFF;
- pub const Cyan = 0x00FFFFFF;
- pub const Magenta = 0xFF00FFFF;
- pub const Yellow = 0xFFFF00FF;
- pub const Paleyellow = 0xFFFFAAFF;
- pub const Darkyellow = 0xEEEE9EFF;
- pub const Darkgreen = 0x448844FF;
- pub const Palegreen = 0xAAFFAAFF;
- pub const Medgreen = 0x88CC88FF;
- pub const Darkblue = 0x000055FF;
- pub const Palebluegreen = 0xAAFFFFFF;
- pub const Paleblue = 0x0000BBFF;
- pub const Bluegreen = 0x008888FF;
- pub const Greygreen = 0x55AAAAFF;
- pub const Palegreygreen = 0x9EEEEEFF;
- pub const Yellowgreen = 0x99994CFF;
- pub const Medblue = 0x000099FF;
- pub const Greyblue = 0x005DBBFF;
- pub const Palegreyblue = 0x4993DDFF;
- pub const Purpleblue = 0x8888CCFF;
-
- pub const Notacolor = 0xFFFFFF00;
- pub const Nofill = Notacolor;
-};
-pub const Borderwidth = 4;
-/// Refresh methods
-pub const Refresh = enum(u8) {- backup = 0,
- none = 1,
- mesg = 2,
-};
-pub fn initDraw(ally: std.mem.Allocator, fontname: ?[]const u8, label: ?[]const u8) !*Display {- return genInitDraw(
- ally,
- "/dev",
- fontname,
- label,
- "/dev",
- .none,
- );
-}
-pub fn genInitDraw(ally: std.mem.Allocator, devdir: []const u8, fontname: ?[]const u8, label: ?[]const u8, windir: []const u8, ref: Refresh) !*Display {- var buf: [128]u8 = undefined;
- var display = try Display.init(ally, .{ .devdir = devdir, .windir = windir });- // TODO deal with fonts
- _ = fontname;
- if (label) |l| blk: {- const labelfds = std.fmt.bufPrint(&buf, "{s}/label", .{display.windir}) catch break :blk;- const labelfd = std.fs.openFileAbsolute(labelfds, .{ .mode = .read_write }) catch break :blk;- defer labelfd.close();
- _ = try labelfd.write(l);
- }
- const winnamefds = std.fmt.bufPrint(&buf, "{s}/winname", .{display.windir}) catch unreachable;- try display.genGetWindow(winnamefds, &display.screen, &display._screen, ref);
- return display;
-}