Aric Stewart : usp10: Properly adjust LogClust when decomposing indic vowels.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 61e82e2c8ccf86e198520577b0000d0bcef4c0b6
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=61e82e2c8ccf86e198520577b0...

Author: Aric Stewart <aric(a)codeweavers.com>
Date:   Mon Oct 17 20:47:23 2011 -0500

usp10: Properly adjust LogClust when decomposing indic vowels.

---

 dlls/usp10/shape.c |   26 ++++++++++++++++----------
 1 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/dlls/usp10/shape.c b/dlls/usp10/shape.c
index 4951c22..0b1af46 100644
--- a/dlls/usp10/shape.c
+++ b/dlls/usp10/shape.c
@@ -1783,10 +1783,11 @@ static void ReplaceInsertChars(HDC hdc, INT cWalk, INT* pcChars, WCHAR *pwOutCha
     }
 }
 
-static void DecomposeVowels(HDC hdc, WCHAR *pwOutChars, INT *pcChars, const VowelComponents vowels[])
+static void DecomposeVowels(HDC hdc, WCHAR *pwOutChars, INT *pcChars, const VowelComponents vowels[], WORD* pwLogClust)
 {
     int i;
     int cWalk;
+    int offset = 0;
 
     for (cWalk = 0; cWalk < *pcChars; cWalk++)
     {
@@ -1794,9 +1795,14 @@ static void DecomposeVowels(HDC hdc, WCHAR *pwOutChars, INT *pcChars, const Vowe
         {
             if (pwOutChars[cWalk] == vowels[i].base)
             {
+                int j;
+                int o = 1;
                 ReplaceInsertChars(hdc, cWalk, pcChars, pwOutChars, vowels[i].parts);
-                if (vowels[i].parts[1]) cWalk++;
-                if (vowels[i].parts[2]) cWalk++;
+                if (vowels[i].parts[1]) { cWalk++; o++; }
+                if (vowels[i].parts[2]) { cWalk++; o++; }
+                offset += o;
+                for (j = (cWalk - offset) + 1; j < *pcChars - offset; j ++)
+                    pwLogClust[j]+=o;
                 break;
             }
         }
@@ -2404,7 +2410,7 @@ static void ContextualShape_Sinhala(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1:  Decompose multi part vowels */
-    DecomposeVowels(hdc, input,  &cCount, Sinhala_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Sinhala_vowels, pwLogClust);
 
     TRACE("New double vowel expanded string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
@@ -2526,7 +2532,7 @@ static void ContextualShape_Bengali(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels and Compose Consonents */
-    DecomposeVowels(hdc, input,  &cCount, Bengali_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Bengali_vowels, pwLogClust);
     ComposeConsonants(hdc, input, &cCount, Bengali_consonants, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
@@ -2683,7 +2689,7 @@ static void ContextualShape_Oriya(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *ps
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels and Compose Consonents */
-    DecomposeVowels(hdc, input,  &cCount, Oriya_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Oriya_vowels, pwLogClust);
     ComposeConsonants(hdc, input, &cCount, Oriya_consonants, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
@@ -2733,7 +2739,7 @@ static void ContextualShape_Tamil(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *ps
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels and Compose Consonents */
-    DecomposeVowels(hdc, input,  &cCount, Tamil_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Tamil_vowels, pwLogClust);
     ComposeConsonants(hdc, input, &cCount, Tamil_consonants, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
@@ -2783,7 +2789,7 @@ static void ContextualShape_Telugu(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *p
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels */
-    DecomposeVowels(hdc, input,  &cCount, Telugu_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Telugu_vowels, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
     /* Step 2: Reorder within Syllables */
@@ -2835,7 +2841,7 @@ static void ContextualShape_Kannada(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels */
-    DecomposeVowels(hdc, input,  &cCount, Kannada_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Kannada_vowels, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
     /* Step 2: Reorder within Syllables */
@@ -2880,7 +2886,7 @@ static void ContextualShape_Malayalam(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS
     memcpy(input, pwcChars, cChars * sizeof(WCHAR));
 
     /* Step 1: Decompose Vowels */
-    DecomposeVowels(hdc, input,  &cCount, Malayalam_vowels);
+    DecomposeVowels(hdc, input,  &cCount, Malayalam_vowels, pwLogClust);
     TRACE("New composed string %s (%i)\n",debugstr_wn(input,cCount),cCount);
 
     /* Step 2: Reorder within Syllables */