From 1d2860e54c26592e44f3f3c463f692aa3882f497 Mon Sep 17 00:00:00 2001
From: Huw Davies <huw@codeweavers.com>
Date: Thu, 18 May 2017 11:07:07 +0100
Subject: [PATCH] ole32: Fix up the dib's resolution on loading.

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/ole32/datacache.c  | 13 +++++++++++++
 dlls/ole32/tests/ole2.c | 21 ++++++++++++++++++---
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/dlls/ole32/datacache.c b/dlls/ole32/datacache.c
index 0db55517f02..40d4ab8c230 100644
--- a/dlls/ole32/datacache.c
+++ b/dlls/ole32/datacache.c
@@ -635,6 +635,7 @@ static HRESULT load_dib( DataCacheEntry *cache_entry, IStream *stm )
     HGLOBAL hglobal;
     ULONG read, info_size, bi_size;
     BITMAPFILEHEADER file;
+    BITMAPINFOHEADER *info;
 
     if (cache_entry->stream_type != contents_stream)
     {
@@ -685,6 +686,18 @@ static HRESULT load_dib( DataCacheEntry *cache_entry, IStream *stm )
     hr = IStream_Read( stm, (char *)dib + info_size, stat.cbSize.u.LowPart, &read );
     if (hr != S_OK || read != stat.cbSize.QuadPart) goto fail;
 
+    if (bi_size >= sizeof(*info))
+    {
+        info = (BITMAPINFOHEADER *)dib;
+        if (info->biXPelsPerMeter == 0 || info->biYPelsPerMeter == 0)
+        {
+            HDC hdc = GetDC( 0 );
+            info->biXPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSX ), 10000, 254 );
+            info->biYPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSY ), 10000, 254 );
+            ReleaseDC( 0, hdc );
+        }
+    }
+
     GlobalUnlock( hglobal );
 
     cache_entry->data_cf = cache_entry->fmtetc.cfFormat;
diff --git a/dlls/ole32/tests/ole2.c b/dlls/ole32/tests/ole2.c
index afff6baa5a6..65abb3e489c 100644
--- a/dlls/ole32/tests/ole2.c
+++ b/dlls/ole32/tests/ole2.c
@@ -1972,6 +1972,8 @@ static void test_data_cache_dib_contents_stream(int num)
     STGMEDIUM med;
     CLSID cls;
     SIZEL sz;
+    BYTE *ptr;
+    BITMAPINFOHEADER expect_info;
 
     hr = CreateDataCache( NULL, &CLSID_Picture_Metafile, &IID_IUnknown, (void **)&unk );
     ok( SUCCEEDED(hr), "got %08x\n", hr );
@@ -1994,11 +1996,24 @@ static void test_data_cache_dib_contents_stream(int num)
 
     hr = IDataObject_GetData( data, &fmt, &med );
     ok( SUCCEEDED(hr), "got %08x\n", hr );
-    if (SUCCEEDED(hr))
+    ok( med.tymed == TYMED_HGLOBAL, "got %x\n", med.tymed );
+    ok( GlobalSize( U(med).hGlobal ) >= sizeof(dib) - sizeof(BITMAPFILEHEADER),
+        "got %lu\n", GlobalSize( U(med).hGlobal ) );
+    ptr = GlobalLock( U(med).hGlobal );
+
+    expect_info = *(BITMAPINFOHEADER *)(dib + sizeof(BITMAPFILEHEADER));
+    if (expect_info.biXPelsPerMeter == 0 || expect_info.biYPelsPerMeter == 0)
     {
-        ok( med.tymed == TYMED_HGLOBAL, "got %x\n", med.tymed );
-        ReleaseStgMedium( &med );
+        HDC hdc = GetDC( 0 );
+        expect_info.biXPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSX ), 10000, 254 );
+        expect_info.biYPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSY ), 10000, 254 );
+        ReleaseDC( 0, hdc );
     }
+    ok( !memcmp( ptr, &expect_info, sizeof(expect_info) ), "mismatch\n" );
+    ok( !memcmp( ptr + sizeof(expect_info), dib + sizeof(BITMAPFILEHEADER) + sizeof(expect_info),
+                 sizeof(dib) - sizeof(BITMAPFILEHEADER) - sizeof(expect_info) ), "mismatch\n" );
+    GlobalUnlock( U(med).hGlobal );
+    ReleaseStgMedium( &med );
 
     hr = IViewObject2_GetExtent( view, DVASPECT_CONTENT, -1, NULL, &sz );
     ok( SUCCEEDED(hr), "got %08x\n", hr );