99aefc8d22
Since we removed the direct2d renderer we no longer need to reference the direct2d-zig repository. Instead we now directly reference the zigwin32 repository. I've also updated that repository with a few fixes and additions which allowed us to remove some code from flow.
21 lines
1 KiB
Zig
21 lines
1 KiB
Zig
const std = @import("std");
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const win32 = @import("win32").everything;
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// TODO: update zigwin32 with a way to get the corresponding IID for any COM interface
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pub fn queryInterface(obj: anytype, comptime Interface: type) *Interface {
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const obj_basename_start: usize = comptime if (std.mem.lastIndexOfScalar(u8, @typeName(@TypeOf(obj)), '.')) |i| (i + 1) else 0;
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const obj_basename = @typeName(@TypeOf(obj))[obj_basename_start..];
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const iface_basename_start: usize = comptime if (std.mem.lastIndexOfScalar(u8, @typeName(Interface), '.')) |i| (i + 1) else 0;
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const iface_basename = @typeName(Interface)[iface_basename_start..];
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const iid_name = "IID_" ++ iface_basename;
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const iid = @field(win32, iid_name);
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var iface: *Interface = undefined;
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const hr = obj.IUnknown.QueryInterface(iid, @ptrCast(&iface));
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if (hr < 0) std.debug.panic(
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"QueryInferface on " ++ obj_basename ++ " as " ++ iface_basename ++ " failed, hresult=0x{x}",
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.{@as(u32, @bitCast(hr))},
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);
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return iface;
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}
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