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const std = @import("std");
const c = @import("c.zig").c;
const gl = @import("gl.zig");
const src = @import("source.zig");
const ctrl = @import("control.zig");
const Output = @import("output.zig").Output;
var global_client: ?*c.GlClient = null;
fn get_or_init_client() *c.GlClient {
if (global_client == null) {
_ = c.gl_client_initialize_external_gl();
global_client = c.gl_client_new_with_server_launch(
c.VK_SERVER_DEFAULT_SOCKET_PATH,
1000,
c.VK_SERVER_EXECUTABLE,
c.VK_SERVER_DEFAULT_LOCKFILE_PATH,
c.VK_SERVER_DEFAULT_SOCKET_PATH,
c.VK_SERVER_DEFAULT_SHMEM_PREFIX,
2000,
2000,
2000,
2000,
2000,
) orelse @panic("failed to init tsv gl_client");
}
return global_client.?;
}
pub const TSVSource = struct {
source: src.Source,
stream: src.StreamFlags,
name: [:0]const u8,
thread: *gl.Thread,
pub fn init(
allocator: std.mem.Allocator,
constants: *const gl.Constants,
texture_type: gl.Texture.Type,
name: [*:0]const u8,
) !*src.Source {
const self = try allocator.create(TSVSource);
errdefer allocator.destroy(self);
self.* = .{
.source = .{
.texture = gl.Texture.create(texture_type),
.update_fn = update_source,
.deinit_fn = deinit,
},
.stream = .{},
.name = try allocator.dupeZ(u8, std.mem.span(name)),
.thread = undefined,
};
errdefer allocator.free(self.name);
self.thread = try gl.Thread.init(allocator, constants, update_loop, .{self});
return &self.source;
}
fn update_source(source: *src.Source) !bool {
const self: *TSVSource = @fieldParentPtr("source", source);
if (self.thread.has_quit) return true;
return false;
}
fn deinit(source: *const src.Source, allocator: std.mem.Allocator) void {
const self: *const TSVSource = @fieldParentPtr("source", source);
self.thread.deinit(allocator);
allocator.free(self.name);
allocator.destroy(self);
}
fn update_loop(self: *TSVSource) !void {
_ = c.gl_client_initialize_external_gl();
const client = c.gl_client_new_with_server_launch(
c.VK_SERVER_DEFAULT_SOCKET_PATH,
1000,
c.VK_SERVER_EXECUTABLE,
c.VK_SERVER_DEFAULT_LOCKFILE_PATH,
c.VK_SERVER_DEFAULT_SOCKET_PATH,
c.VK_SERVER_DEFAULT_SHMEM_PREFIX,
2000,
2000,
2000,
2000,
2000,
) orelse return error.tsvErrorCreateClient;
const guard = c.gl_client_find_image_data(client, self.name, false) orelse return error.tsvDataNotFound;
defer c.gl_client_image_data_guard_destroy(guard);
const metadata = c.gl_client_image_data_guard_read(guard) orelse return error.tsvError;
self.source.texture.allocate(
@intCast(metadata.*.width),
@intCast(metadata.*.height),
0,
c.GL_RGBA8,
);
while (!self.thread.quit) {
try self.update(client);
c.glFlush();
try std.Thread.yield();
}
}
fn update(self: *TSVSource, client: *c.GlClient) !void {
if (!self.stream.shouldStep()) return;
switch (c.gl_client_recv_image(
client,
self.name.ptr,
self.source.texture.id,
@intFromEnum(self.source.texture.type),
false,
0,
null,
)) {
c.RequiresUpdate, c.Found => {},
c.NotFound => return error.tsvRecvNotFound,
c.Error => return error.tsvRecvError,
else => unreachable,
}
}
};
pub const TSVOutput = struct {
pub const Config = struct {
name: [:0]const u8,
pub const default: Config = .{
.name = "glsl-view",
};
pub fn create(
config: *const Config,
allocator: std.mem.Allocator,
constants: *gl.Constants,
) !*Output {
const self = allocator.create(TSVOutput) catch unreachable;
self.* = .{
.output = .{
.update_fn = update,
.destroy_fn = destroy,
},
.config = config,
};
switch (c.gl_client_init_image(
get_or_init_client(),
config.name,
@intCast(constants.config.width),
@intCast(constants.config.height),
c.R8G8B8A8,
true,
)) {
c.RequiresUpdate, c.Found => {},
c.NotFound => return error.tsvCreateNotFound,
c.Error => return error.tsvCreateError,
else => unreachable,
}
return &self.output;
}
};
output: Output,
config: *const Config,
fn update(output: *Output, fbo: gl.FramebufferObject, fresh: bool) !?bool {
const self: *TSVOutput = @fieldParentPtr("output", output);
if (fresh) {
var prev_fbo: c.GLint = undefined;
c.glGetIntegerv(c.GL_DRAW_FRAMEBUFFER_BINDING, &prev_fbo);
switch (c.gl_client_send_image(
get_or_init_client(),
self.config.name,
fbo.texture_id,
c.GL_TEXTURE_2D,
false,
@intCast(prev_fbo),
null,
)) {
1 => {},
0 => std.debug.print("tsv send: no remote image\n", .{}),
else => |e| std.debug.print("tsv send: error {}\n", .{e}),
}
}
return null;
}
fn destroy(output: *Output, allocator: std.mem.Allocator) void {
const self: *TSVOutput = @fieldParentPtr("output", output);
allocator.destroy(self);
}
};
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