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ui: Check the return value of ReleaseDC()

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This commit is contained in:
Hajime Hoshi 2016-08-09 00:25:47 +09:00
parent 96a43bcb4d
commit 3619a796dc
1 changed files with 10 additions and 5 deletions
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15
internal/ui/ui_windows.go
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@ -20,16 +20,21 @@ package ui
//
// #include <windows.h>
//
// static int getDPI() {
// static char* getDPI(int* dpi) {
// HDC dc = GetWindowDC(0);
// int dpi = GetDeviceCaps(dc, LOGPIXELSX);
// ReleaseDC(0, dc);
// return dpi;
// *dpi = GetDeviceCaps(dc, LOGPIXELSX);
// if (!ReleaseDC(0, dc)) {
// return "ReleaseDC failed";
// }
// return "";
// }
import "C"
func deviceScale() float64 {
dpi := int(C.getDPI())
dpi := C.int(0)
if errmsg := C.GoString(C.getDPI(&dpi)); errmsg != "" {
panic(errmsg)
}
return float64(dpi) / 96
}