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package moe.yuuta.aero
import aero.*
import kotlinx.cinterop.*
import platform.windows.*
fun main() {
SetProcessDPIAware()
val hInstance = GetModuleHandleA(null)
val nCmdShow = memScoped {
val startUpInfo = nativeHeap.alloc<_STARTUPINFOA>()
GetStartupInfoA(startUpInfo.ptr)
val nCmdShow = startUpInfo.wShowWindow
nativeHeap.free(startUpInfo)
return@memScoped nCmdShow.convert<Int>()
}
val className = "Main Window Class"
memScoped {
val wc = cValue<WNDCLASSA> {
lpfnWndProc = staticCFunction(::windowProc)
this.hInstance = hInstance
lpszClassName = className.cstr.ptr
}
RegisterClassA(wc.ptr)
return@memScoped wc
}
val hwnd = CreateWindowExA(
0.convert(),
className,
"", // Filling texts will get the white background of the label
WS_OVERLAPPEDWINDOW.convert(),
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
null,
null,
hInstance,
null
)
val forceDialogEnv = memScoped {
val buffer = nativeHeap.allocArray<CHARVar>(MAX_PATH)
GetEnvironmentVariableA("AERO_DEMO_FORCE_DIALOG",
buffer,
MAX_PATH
)
val env = buffer.toKString()
nativeHeap.free(buffer)
return@memScoped env
}
if (hwnd == null || (forceDialogEnv == "true")) {
memScoped {
// Fallback
val dlgImpl = cValue<DLGTEMPLATE> {
style = (WS_OVERLAPPEDWINDOW or
DS_CENTER or
DS_MODALFRAME).convert()
dwExtendedStyle = 0.convert()
cdit = 0.convert()
x = 0
y = 0
cx = 400
cy = 200
}
return@memScoped DialogBoxIndirectParamW(hInstance,
dlgImpl.ptr,
null,
staticCFunction(::dlgProc),
0)
}
} else {
ShowWindow(hwnd, nCmdShow)
msgLoop()
}
}
fun msgLoop() {
memScoped {
val msg = nativeHeap.alloc<MSG>()
while (GetMessageA(msg.ptr,
null,
0.convert(),
0.convert()) != 0) {
TranslateMessage(msg.ptr)
DispatchMessageA(msg.ptr)
}
// The queue quits
nativeHeap.free(msg)
}
}
fun windowProc(hwnd: HWND?,
uMsg: UINT,
wParam: WPARAM,
lParam: LPARAM): LRESULT {
return when (uMsg.convert<Int>()) {
WM_CREATE -> {
setAero(hwnd)
1
}
WM_DESTROY -> {
PostQuitMessage(0)
1
}
WM_PAINT -> {
val ps = nativeHeap.alloc<PAINTSTRUCT>()
val hdc = BeginPaint(hwnd, ps.ptr)
FillRect(hdc,
ps.rcPaint.ptr,
GetStockObject(BLACK_BRUSH) as HBRUSH)
EndPaint(hwnd, ps.ptr)
nativeHeap.free(ps)
1
}
else -> {
DefWindowProcA(hwnd, uMsg, wParam, lParam)
}
}
}
fun dlgProc(hDlg: HWND?,
message: UINT,
wParam: WPARAM,
lParam: LPARAM): INT_PTR {
when (message.convert<Int>()) {
WM_INITDIALOG -> {
setAero(hDlg)
return true.toByte().toLong()
}
WM_COMMAND -> {
EndDialog(hDlg, wParam.convert())
return true.toByte().toLong()
}
WM_CTLCOLORDLG -> {
return GetStockObject(BLACK_BRUSH).rawValue.toLong()
}
else -> {
return false.toByte().toLong()
}
}
}
fun setAero(hwnd: HWND?) {
val hUser = GetModuleHandleW("user32.dll") ?: return
val setWindowCompositionAttribute = GetProcAddress(hUser,
"SetWindowCompositionAttribute")
as pfnSetWindowCompositionAttribute? ?: return
val accent = cValue<ACCENT_POLICY> {
AccentState = ACCENT_ENABLE_BLURBEHIND
AccentFlags = 0.convert()
GradientColor = 0.convert()
AnimationId = 0.convert()
}
memScoped {
val data = cValue<WINDOWCOMPOSITIONATTRIBDATA> {
Attrib = WCA_ACCENT_POLICY
pvData = accent.ptr
cbData = accent.size.convert()
}
setWindowCompositionAttribute(hwnd, data.ptr)
}
}
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