usp10: Correct glyph caching beyond the BMP.

dlls/usp10/usp10.c

@@ -746,18 +746,24 @@ static inline BYTE get_cache_pitch_family(SCRIPT_CACHE *psc)
 
 static inline WORD get_cache_glyph(SCRIPT_CACHE *psc, DWORD c)
 {
-    WORD *block = ((ScriptCache *)*psc)->glyphs[c >> GLYPH_BLOCK_SHIFT];
+    CacheGlyphPage *page = ((ScriptCache *)*psc)->page[c / 0x10000];
+    WORD *block;
 
+    if (!page) return 0;
+    block = page->glyphs[(c % 0x10000) >> GLYPH_BLOCK_SHIFT];
     if (!block) return 0;
-    return block[c & GLYPH_BLOCK_MASK];
+    return block[(c % 0x10000) & GLYPH_BLOCK_MASK];
 }
 
 static inline WORD set_cache_glyph(SCRIPT_CACHE *psc, WCHAR c, WORD glyph)
 {
-    WORD **block = &((ScriptCache *)*psc)->glyphs[c >> GLYPH_BLOCK_SHIFT];
+    CacheGlyphPage **page = &((ScriptCache *)*psc)->page[c / 0x10000];
+    WORD **block;
+    if (!*page && !(*page = heap_alloc_zero(sizeof(CacheGlyphPage)))) return 0;
 
+    block = &(*page)->glyphs[(c % 0x10000) >> GLYPH_BLOCK_SHIFT];
     if (!*block && !(*block = heap_alloc_zero(sizeof(WORD) * GLYPH_BLOCK_SIZE))) return 0;
-    return ((*block)[c & GLYPH_BLOCK_MASK] = glyph);
+    return ((*block)[(c % 0x10000) & GLYPH_BLOCK_MASK] = glyph);
 }
 
 static inline BOOL get_cache_glyph_widths(SCRIPT_CACHE *psc, WORD glyph, ABC *abc)
@@ -965,9 +971,16 @@ HRESULT WINAPI ScriptFreeCache(SCRIPT_CACHE *psc)
         unsigned int i;
         for (i = 0; i < GLYPH_MAX / GLYPH_BLOCK_SIZE; i++)
         {
-            heap_free(((ScriptCache *)*psc)->glyphs[i]);
             heap_free(((ScriptCache *)*psc)->widths[i]);
         }
+        for (i = 0; i < 0x10; i++)
+        {
+            int j;
+            if (((ScriptCache *)*psc)->page[i])
+                for (j = 0; j < GLYPH_MAX / GLYPH_BLOCK_SIZE; j++)
+                    heap_free(((ScriptCache *)*psc)->page[i]->glyphs[j]);
+            heap_free(((ScriptCache *)*psc)->page[i]);
+        }
         heap_free(((ScriptCache *)*psc)->GSUB_Table);
         heap_free(((ScriptCache *)*psc)->GDEF_Table);
         heap_free(((ScriptCache *)*psc)->CMAP_Table);

dlls/usp10/usp10_internal.h

@@ -151,10 +151,14 @@ typedef struct {
 } LoadedScript;
 
 typedef struct {
+    WORD *glyphs[GLYPH_MAX / GLYPH_BLOCK_SIZE];
+} CacheGlyphPage;
+
+typedef struct {
     LOGFONTW lf;
     TEXTMETRICW tm;
     BOOL sfnt;
-    WORD *glyphs[GLYPH_MAX / GLYPH_BLOCK_SIZE];
+    CacheGlyphPage *page[0x10];
     ABC *widths[GLYPH_MAX / GLYPH_BLOCK_SIZE];
     LPVOID GSUB_Table;
     LPVOID GDEF_Table;