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[win32][arm64] Support Dark Theme on newer Windows builds #1172

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May 21, 2024
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[win32][arm64] Support Dark Theme on newer Windows builds #1172

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12 changes: 10 additions & 2 deletions bundles/org.eclipse.swt/Eclipse SWT PI/win32/library/os_custom.c
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Original file line number Diff line number Diff line change
Expand Up @@ -234,9 +234,17 @@ BOOL Validate_SetPreferredAppMode(const BYTE* functionPtr)
(functionPtr[0x06] == 0x87) && (functionPtr[0x07] == 0x0D) && // xchg ecx,dword ptr [uxtheme!g_preferredAppMode]
(functionPtr[0x0C] == 0xC3); // ret
#elif defined(_M_ARM64)
if (*(const DWORD*)(&functionPtr[0x1C]) == 0x912F6100) // add x0,x8,#0xBD8
const DWORD ldr = *(const DWORD*)(&functionPtr[0x14]);
const DWORD add = *(const DWORD*)(&functionPtr[0x1C]);

if ((ldr & 0xFFC003FF) == 0xB9400113 && // ldr, w19,[x8, arg0]
*(const DWORD*)(&functionPtr[0x18]) == 0x2A0003E1 && // mov w1,w0
(add & 0xFFC003FF) == 0x91000100 && // add x0,x8,arg1
*(const DWORD*)(&functionPtr[0x24]) == 0x2A1303E0) // mov w0,w19
{
return TRUE;
const DWORD arg0 = ((ldr & 0x003FFC00) >> 10) * 4;
const DWORD arg1 = ((add & 0x003FFC00) >> 10);
return arg0 == arg1;
}

return FALSE;
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