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const std = @import("std");
const wayland = @import("../../root.zig");
const wl = wayland.wl;
const Format = wl.Shm.Format;
const AnonymousFile = wl.Shm.AnonymousFile;
const Self = @This();
const log = std.log.scoped(.@"wl.shm.pool");
pub const Events = wayland.EventSet(@This(), .{});
pub const Request = union(enum) {
create_buffer: struct { wayland.Object.Ref, u32, u32, u32, u32, Format },
destroy: void,
resize: struct { u32 },
};
handle: wayland.Object.Ref = .null,
init: wayland.Object.interface.Init(Self) = .{},
file: AnonymousFile,
buffer: []u8,
pub fn deinit(self: *Self, ctx: wayland.Context) void {
self.file.close();
std.posix.munmap(@alignCast(self.buffer));
ctx.display.registry.disable_object(self.handle);
ctx.display.request(self, .{ .destroy = {} }) catch |e| {
log.err("error on deinit: {}", .{e});
};
self.* = undefined;
}
pub fn create_buffer(
self: *Self,
ctx: wayland.Context,
offset: u32,
width: u32,
height: u32,
comptime format: Format,
) !*wl.Buffer(format) {
const stride = width * format.bytes_per_pixel();
const data = self.buffer[offset..offset + stride * height];
const buffer = try ctx.allocator.create(wl.Buffer(format));
errdefer ctx.allocator.destroy(buffer);
try buffer.init.with(ctx, .{
.width = width,
.height = height,
.data = @alignCast(@ptrCast(data)),
});
try ctx.display.request(
self,
.{
.create_buffer = .{
buffer.handle,
@truncate(offset),
@truncate(width),
@truncate(height),
@truncate(stride),
format,
}
}
);
return buffer;
}
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