[PATCH] gdiplus: In GdipPrivateAddMemoryFont allow loading fonts with long names

[Fabian Maurer]

Fixes Bug 43956.

Signed-off-by: Fabian Maurer 
---
 dlls/gdiplus/font.c | 38 ++++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/dlls/gdiplus/font.c b/dlls/gdiplus/font.c
index ccf93ed395..f99b026b25 100644
--- a/dlls/gdiplus/font.c
+++ b/dlls/gdiplus/font.c
@@ -1393,33 +1393,36 @@ static int match_name_table_language( const tt_name_record *name, LANGID lang )
     return 0;
 }

-static WCHAR *copy_name_table_string( const tt_name_record *name, const BYTE *data, WCHAR *ret, DWORD len )
+static WCHAR *copy_name_table_string( const tt_name_record *name, const BYTE *data )
 {
     WORD name_len = GET_BE_WORD(name->length);
     WORD codepage;
+    WCHAR *ret;
+    int len;

switch (GET_BE_WORD(name->platform_id))
     {
     case TT_PLATFORM_APPLE_UNICODE:
     case TT_PLATFORM_MICROSOFT:
-        if (name_len >= len*sizeof(WCHAR))
-            return NULL;
+        ret = heap_alloc((name_len / 2 + 1) * sizeof(WCHAR));
         for (len = 0; len < name_len / 2; len++)
             ret[len] = (data[len * 2] << 8) | data[len * 2 + 1];
         ret[len] = 0;
         return ret;
     case TT_PLATFORM_MACINTOSH:
         codepage = get_mac_code_page( name );
-        len = MultiByteToWideChar( codepage, 0, (char *)data, name_len, ret, len-1 );
+        len = MultiByteToWideChar( codepage, 0, (char *)data, name_len, NULL, 0 ) + 1;
         if (!len)
             return NULL;
+        ret = heap_alloc(len * sizeof(WCHAR));
+        len = MultiByteToWideChar( codepage, 0, (char *)data, name_len, ret, len - 1 );
         ret[len] = 0;
         return ret;
     }
     return NULL;
 }

-static WCHAR *load_ttf_name_id( const BYTE *mem, DWORD_PTR size, DWORD id, WCHAR *ret, DWORD len )
+static WCHAR *load_ttf_name_id( const BYTE *mem, DWORD_PTR size, DWORD id )
 {
     LANGID lang = GetSystemDefaultLangID();
     const tt_header *header;
@@ -1480,8 +1483,9 @@ static WCHAR *load_ttf_name_id( const BYTE *mem, DWORD_PTR size, DWORD id, WCHAR

if (best_lang)
     {
+        WCHAR *ret;
         name_record = (const tt_name_record*)(name_table + 1) + best_index;
-        ret = copy_name_table_string( name_record, mem+ofs+GET_BE_WORD(name_record->offset), ret, len );
+        ret = copy_name_table_string( name_record, mem+ofs+GET_BE_WORD(name_record->offset) );
         TRACE( "name %u found platform %u lang %04x %s\n", GET_BE_WORD(name_record->name_id),
                 GET_BE_WORD(name_record->platform_id), GET_BE_WORD(name_record->language_id), debugstr_w( ret ));
         return ret;
@@ -1497,43 +1501,45 @@ static INT CALLBACK add_font_proc(const LOGFONTW *lfw, const TEXTMETRICW *ntm, D
 GpStatus WINGDIPAPI GdipPrivateAddMemoryFont(GpFontCollection* fontCollection,
         GDIPCONST void* memory, INT length)
 {
-    WCHAR buf[32], *name;
+    WCHAR *name;
     DWORD count = 0;
     HANDLE font;
+    GpStatus ret = Ok;
     TRACE("%p, %p, %d\n", fontCollection, memory, length);

if (!fontCollection || !memory || !length)
         return InvalidParameter;

-    name = load_ttf_name_id(memory, length, NAME_ID_FULL_FONT_NAME, buf, sizeof(buf)/sizeof(*buf));
+    name = load_ttf_name_id(memory, length, NAME_ID_FULL_FONT_NAME);
     if (!name)
         return OutOfMemory;

font = AddFontMemResourceEx((void*)memory, length, NULL, &count);
     TRACE("%s: %p/%u\n", debugstr_w(name), font, count);
     if (!font || !count)
-        return InvalidParameter;
-
-    if (count)
+        ret = InvalidParameter;
+    else
     {
         HDC hdc;
         LOGFONTW lfw;

hdc = CreateCompatibleDC(0);

+        /* Truncate name if necessary, GDI32 can't deal with long names */
+        if(lstrlenW(name) > LF_FACESIZE - 1)
+            name[LF_FACESIZE - 1] = 0;
+
         lfw.lfCharSet = DEFAULT_CHARSET;
         lstrcpyW(lfw.lfFaceName, name);
         lfw.lfPitchAndFamily = 0;

if (!EnumFontFamiliesExW(hdc, &lfw, add_font_proc, (LPARAM)fontCollection, 0))
-        {
-            DeleteDC(hdc);
-            return OutOfMemory;
-        }
+            ret = OutOfMemory;

DeleteDC(hdc);
     }
-    return Ok;
+    heap_free(name);
+    return ret;
 }

/*****************************************************************************

[Vincent Povirk]

I did some testing on Windows, and both of the font files on the bug
seem to just be named "LCD". On Wine with your patch,
GdipPrivateAddFontFile returns success but doesn't add the font to the
collection.

[Fabian Maurer]

Hi Vincent,
> I did some testing on Windows, and both of the font files on the bug
> seem to just be named "LCD". On Wine with your patch,
> GdipPrivateAddFontFile returns success but doesn't add the font to the
> collection.

Thanks for testing. There's indeed another problem, it's related to wine using the 
human readable name instead of the family name.
I'll send an updated patch addressing this too.

Regards,
Fabian Maurer