[PATCH v3] comctl32/imagelist: fix ImageList_Read

[Denis Malikov]

Fix for versions x600 and x620 and pointer calculation for mixing image and mask bits.

Tested on *.reg files extracted from:
 - XP/2003 key HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\TrayNotify;
 - Vista/7 key HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify

Signed-off-by: Denis Malikov <mdn40000 at mail.ru>
---
 dlls/comctl32/imagelist.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/dlls/comctl32/imagelist.c b/dlls/comctl32/imagelist.c
index a08d60752e..be901462a0 100644
--- a/dlls/comctl32/imagelist.c
+++ b/dlls/comctl32/imagelist.c
@@ -2267,7 +2267,9 @@ HIMAGELIST WINAPI ImageList_Read(IStream *pstm)
 	return NULL;
     if (ilHead.usMagic != (('L' << 8) | 'I'))
 	return NULL;
-    if (ilHead.usVersion != 0x101) /* probably version? */
+    if (ilHead.usVersion != 0x101 && 
+        ilHead.usVersion != 0x600 && /* XP/2003 version */
+        ilHead.usVersion != 0x620)   /* Vista/7 version */
 	return NULL;
 
     TRACE("cx %u, cy %u, flags 0x%04x, cCurImage %u, cMaxImage %u\n",
@@ -2296,23 +2298,25 @@ HIMAGELIST WINAPI ImageList_Read(IStream *pstm)
     {
         DWORD *ptr = image_bits;
         BYTE *mask_ptr = mask_bits;
-        int stride = himl->cy * image_info->bmiHeader.biWidth;
+        int stride = himl->cy * (ilHead.usVersion != 0x101 ? himl->cx : image_info->bmiHeader.biWidth);
+        int image_step = ilHead.usVersion != 0x101 ? 1 : TILE_COUNT;
+        int mask_step = ilHead.usVersion != 0x101 ? 4 : 8;
 
         if (image_info->bmiHeader.biHeight > 0)  /* bottom-up */
         {
             ptr += image_info->bmiHeader.biHeight * image_info->bmiHeader.biWidth - stride;
-            mask_ptr += (image_info->bmiHeader.biHeight * image_info->bmiHeader.biWidth - stride) / 8;
+            mask_ptr += (image_info->bmiHeader.biHeight * image_info->bmiHeader.biWidth - stride) / mask_step;
             stride = -stride;
             image_info->bmiHeader.biHeight = himl->cy;
         }
         else image_info->bmiHeader.biHeight = -himl->cy;
 
-        for (i = 0; i < ilHead.cCurImage; i += TILE_COUNT)
+        for (i = 0; i < ilHead.cCurImage; i += image_step)
         {
-            add_dib_bits( himl, i, min( ilHead.cCurImage - i, TILE_COUNT ),
+            add_dib_bits( himl, i, min( ilHead.cCurImage - i, image_step ),
                           himl->cx, himl->cy, image_info, mask_info, ptr, mask_ptr );
             ptr += stride;
-            mask_ptr += stride / 8;
+            mask_ptr += stride / mask_step;
         }
     }
     else
-- 
2.16.2.windows.1