From 937c2615e6ab926d7b2cff2b38fae8f0600e6ba0 Mon Sep 17 00:00:00 2001
From: Joachim Henze <Joachim.Henze@reactos.org>
Date: Sat, 17 Feb 2018 19:29:24 +0100
Subject: [PATCH] [0.4.8] [USP10] Apply unfinished patch to avoid CORE-14226

Thomas linked the patch in Wine Bug 44410
I tested it for some weeks without noticing any side-effects.
It avoids text rendering regressions in some setups like UltraISO
---
 dll/win32/usp10/usp10.c          | 20 ++++++++++++--------
 dll/win32/usp10/usp10_internal.h |  1 +
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/dll/win32/usp10/usp10.c b/dll/win32/usp10/usp10.c
index abc40fc891a..86efc89d702 100644
--- a/dll/win32/usp10/usp10.c
+++ b/dll/win32/usp10/usp10.c
@@ -830,19 +830,23 @@ static inline WORD set_cache_glyph(SCRIPT_CACHE *psc, WCHAR c, WORD glyph)
     return ((*block)[(c % 0x10000) & GLYPH_BLOCK_MASK] = glyph);
 }
 
-static inline BOOL get_cache_glyph_widths(SCRIPT_CACHE *psc, WORD glyph, ABC *abc)
+static inline BOOL get_cache_glyph_widths(SCRIPT_CACHE *psc, WORD glyph, ABC *abc, BOOL no_glyph_index)
 {
     static const ABC nil;
-    ABC *block = ((ScriptCache *)*psc)->widths[glyph >> GLYPH_BLOCK_SHIFT];
+    ABC *block = no_glyph_index ?
+             ((ScriptCache *)*psc)->widths[glyph >> GLYPH_BLOCK_SHIFT] :
+             ((ScriptCache *)*psc)->glyph_widths[glyph >> GLYPH_BLOCK_SHIFT];
 
     if (!block || !memcmp(&block[glyph & GLYPH_BLOCK_MASK], &nil, sizeof(ABC))) return FALSE;
     memcpy(abc, &block[glyph & GLYPH_BLOCK_MASK], sizeof(ABC));
     return TRUE;
 }
 
-static inline BOOL set_cache_glyph_widths(SCRIPT_CACHE *psc, WORD glyph, ABC *abc)
+static inline BOOL set_cache_glyph_widths(SCRIPT_CACHE *psc, WORD glyph, ABC *abc, BOOL no_glyph_index)
 {
-    ABC **block = &((ScriptCache *)*psc)->widths[glyph >> GLYPH_BLOCK_SHIFT];
+    ABC **block = no_glyph_index ?
+             &((ScriptCache *)*psc)->widths[glyph >> GLYPH_BLOCK_SHIFT] :
+             &((ScriptCache *)*psc)->glyph_widths[glyph >> GLYPH_BLOCK_SHIFT];
 
     if (!*block && !(*block = heap_alloc_zero(sizeof(ABC) * GLYPH_BLOCK_SIZE))) return FALSE;
     memcpy(&(*block)[glyph & GLYPH_BLOCK_MASK], abc, sizeof(ABC));
@@ -3413,7 +3417,7 @@ HRESULT WINAPI ScriptPlaceOpenType( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS
         {
             abc.abcA = abc.abcB = abc.abcC = 0;
         }
-        else if (!get_cache_glyph_widths(psc, pwGlyphs[i], &abc))
+        else if (!get_cache_glyph_widths(psc, pwGlyphs[i], &abc, psa->fNoGlyphIndex))
         {
             BOOL ret;
             if (!hdc) return E_PENDING;
@@ -3436,7 +3440,7 @@ HRESULT WINAPI ScriptPlaceOpenType( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS
                 abc.abcB = width;
                 abc.abcA = abc.abcC = 0;
             }
-            set_cache_glyph_widths(psc, pwGlyphs[i], &abc);
+            set_cache_glyph_widths(psc, pwGlyphs[i], &abc, psa->fNoGlyphIndex);
         }
         if (pABC)
         {
@@ -3698,7 +3702,7 @@ HRESULT WINAPI ScriptGetGlyphABCWidth(HDC hdc, SCRIPT_CACHE *psc, WORD glyph, AB
     if (!abc) return E_INVALIDARG;
     if ((hr = init_script_cache(hdc, psc)) != S_OK) return hr;
 
-    if (!get_cache_glyph_widths(psc, glyph, abc))
+    if (!get_cache_glyph_widths(psc, glyph, abc, FALSE))
     {
         if (!hdc) return E_PENDING;
         if ((get_cache_pitch_family(psc) & TMPF_TRUETYPE))
@@ -3712,7 +3716,7 @@ HRESULT WINAPI ScriptGetGlyphABCWidth(HDC hdc, SCRIPT_CACHE *psc, WORD glyph, AB
             abc->abcB = width;
             abc->abcA = abc->abcC = 0;
         }
-        set_cache_glyph_widths(psc, glyph, abc);
+        set_cache_glyph_widths(psc, glyph, abc, FALSE);
     }
     return S_OK;
 }
diff --git a/dll/win32/usp10/usp10_internal.h b/dll/win32/usp10/usp10_internal.h
index c0e28d542c0..63293144d9d 100644
--- a/dll/win32/usp10/usp10_internal.h
+++ b/dll/win32/usp10/usp10_internal.h
@@ -204,6 +204,7 @@ typedef struct {
     BOOL sfnt;
     CacheGlyphPage *page[NUM_PAGES];
     ABC *widths[GLYPH_MAX / GLYPH_BLOCK_SIZE];
+    ABC *glyph_widths[GLYPH_MAX / GLYPH_BLOCK_SIZE];
     void *GSUB_Table;
     void *GDEF_Table;
     void *CMAP_Table;