[ros-diffs] 02/02: [SHLWAPI] Implement SHAreIconsEqual CORE-14425

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=173b79095c1f7aaf8e5c0…

commit 173b79095c1f7aaf8e5c0e5d3b57b6d54392c1c0
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Mon Mar 5 22:43:05 2018 +0100
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Mon Mar 5 22:43:18 2018 +0100

    [SHLWAPI] Implement SHAreIconsEqual
    CORE-14425
---
 dll/win32/shlwapi/rosordinal.c | 57 ++++++++++++++++++++++++++++++++++++++++++
 dll/win32/shlwapi/shlwapi.spec |  2 +-
 2 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/dll/win32/shlwapi/rosordinal.c b/dll/win32/shlwapi/rosordinal.c
index 53d2a28a43..d392b64120 100644
--- a/dll/win32/shlwapi/rosordinal.c
+++ b/dll/win32/shlwapi/rosordinal.c
@@ -37,3 +37,60 @@ HRESULT WINAPI SHForwardContextMenuMsg(IUnknown* pUnk, UINT uMsg,
WPARAM wParam,
     IContextMenu2_Release(pcmenu2);
     return hr;
 }
+
+/* http://undoc.airesoft.co.uk/shlwapi.dll/SHAreIconsEqual.php */
+
+BOOL WINAPI SHAreIconsEqual(HICON hIcon1, HICON hIcon2)
+{
+    ICONINFO iconInfo1, iconInfo2;
+    BITMAP bm1, bm2;
+    BOOL bSame = FALSE;
+
+    if (!hIcon1 || !hIcon2)
+        return FALSE;
+
+    if (!GetIconInfo(hIcon1, &iconInfo1))
+        return FALSE;
+
+    if (!GetIconInfo(hIcon2, &iconInfo2))
+    {
+        DeleteObject(iconInfo1.hbmColor);
+        DeleteObject(iconInfo1.hbmMask);
+        return FALSE;
+    }
+
+    GetObjectW(iconInfo1.hbmColor, sizeof(bm1), &bm1);
+    GetObjectW(iconInfo2.hbmColor, sizeof(bm2), &bm2);
+
+    if (bm1.bmWidth == bm2.bmWidth && bm1.bmHeight == bm2.bmHeight)
+    {
+        BITMAPINFO bmi = { { sizeof(bmi), bm1.bmWidth, bm1.bmHeight, 1, 32 } };
+        HDC hdc = GetDC(0);
+        SIZE_T size = bm1.bmWidth * bm1.bmHeight * 4;
+        BYTE *data1, *data2;
+
+        data1 = HeapAlloc(GetProcessHeap(), 0, size);
+        data2 = HeapAlloc(GetProcessHeap(), 0, size);
+
+        if (data1 && data2)
+        {
+            if (GetDIBits(hdc, iconInfo1.hbmColor, 0, bm1.bmHeight, data1, &bmi,
DIB_RGB_COLORS) &&
+                GetDIBits(hdc, iconInfo2.hbmColor, 0, bm2.bmHeight, data2, &bmi,
DIB_RGB_COLORS))
+            {
+                bSame = memcmp(data1, data2, size) == 0;
+            }
+        }
+        HeapFree(GetProcessHeap(), 0, data1);
+        HeapFree(GetProcessHeap(), 0, data2);
+
+        ReleaseDC(NULL, hdc);
+    }
+
+    DeleteObject(iconInfo1.hbmColor);
+    DeleteObject(iconInfo1.hbmMask);
+
+    DeleteObject(iconInfo2.hbmColor);
+    DeleteObject(iconInfo2.hbmMask);
+
+    return bSame;
+}
diff --git a/dll/win32/shlwapi/shlwapi.spec b/dll/win32/shlwapi/shlwapi.spec
index b70601775d..0f5707c8d4 100644
--- a/dll/win32/shlwapi/shlwapi.spec
+++ b/dll/win32/shlwapi/shlwapi.spec
@@ -545,7 +545,7 @@
 545 stdcall -noname SHForwardContextMenuMsg(ptr long long long ptr long)
 546 stub -noname IUnknown_DoContextMenuPopup
 547 stdcall DelayLoadFailureHook(str str) kernel32.DelayLoadFailureHook
-548 stub -noname SHAreIconsEqual
+548 stdcall -noname SHAreIconsEqual(ptr ptr)
 549 stdcall -noname SHCoCreateInstanceAC(ptr ptr long ptr ptr)
 550 stub -noname GetTemplateInfoFromHandle
 551 stub -noname IShellFolder_CompareIDs