| ... | ... | @@ -603,13 +603,34 @@ pub fn callMain() u8 { |
| 603 | 603 | } |
| 604 | 604 | |
| 605 | 605 | pub fn call_wWinMain() std.os.windows.INT { |
| 606 | const peb = std.os.windows.peb(); |
| 606 | 607 | const MAIN_HINSTANCE = @typeInfo(@TypeOf(root.wWinMain)).Fn.params[0].type.?; |
| 607 | 608 | const hInstance = @as(MAIN_HINSTANCE, @ptrCast(std.os.windows.kernel32.GetModuleHandleW(null).?)); |
| 608 | 609 | const lpCmdLine = std.os.windows.kernel32.GetCommandLineW(); |
| 609 | 610 | |
| 610 | | // There's no (documented) way to get the nCmdShow parameter, so we're |
| 611 | | // using this fairly standard default. |
| 612 | | const nCmdShow = 5; |
| 611 | // There are various types used for the 'show window' variable through the Win32 APIs: |
| 612 | // - u16 in STARTUPINFOA.wShowWindow / STARTUPINFOW.wShowWindow |
| 613 | // - c_int in ShowWindow |
| 614 | // - u32 in PEB.ProcessParameters.dwShowWindow |
| 615 | // Since STARTUPINFO is the bottleneck for the allowed values, we use `u16` as the |
| 616 | // type which can coerce into i32/c_int/u32 depending on how the user defines their wWinMain |
| 617 | // (the Win32 docs show wWinMain with `int` as the type for nCmdShow). |
| 618 | const nCmdShow: u16 = nCmdShow: { |
| 619 | // This makes Zig match the nCmdShow behavior of a C program with a WinMain symbol: |
| 620 | // - With STARTF_USESHOWWINDOW set in STARTUPINFO.dwFlags of the CreateProcess call: |
| 621 | // - Compiled with subsystem:console -> nCmdShow is always SW_SHOWDEFAULT |
| 622 | // - Compiled with subsystem:windows -> nCmdShow is STARTUPINFO.wShowWindow from |
| 623 | // the parent CreateProcess call |
| 624 | // - With STARTF_USESHOWWINDOW unset: |
| 625 | // - nCmdShow is always SW_SHOWDEFAULT |
| 626 | const SW_SHOWDEFAULT = 10; |
| 627 | const STARTF_USESHOWWINDOW = 1; |
| 628 | // root having a wWinMain means that std.builtin.subsystem will always have a non-null value. |
| 629 | if (std.builtin.subsystem.? == .Windows and peb.ProcessParameters.dwFlags & STARTF_USESHOWWINDOW != 0) { |
| 630 | break :nCmdShow @truncate(peb.ProcessParameters.dwShowWindow); |
| 631 | } |
| 632 | break :nCmdShow SW_SHOWDEFAULT; |
| 633 | }; |
| 613 | 634 | |
| 614 | 635 | // second parameter hPrevInstance, MSDN: "This parameter is always NULL" |
| 615 | 636 | return root.wWinMain(hInstance, null, lpCmdLine, nCmdShow); |
Ryan Liptak <squeek502@hotmail.com> 2023-10-31 01:26:50-07:00
Andrew Kelley <andrew@ziglang.org> 2023-11-02 00:19:40-04:00
lib