wordpad: Use inches instead of cm in calculations.

programs/wordpad/print.c

@@ -132,24 +132,22 @@ static HDC make_dc(void)
 
 static LONG twips_to_centmm(int twips)
 {
-    return MulDiv(twips, 1000, TWIPS_PER_CM);
+    return MulDiv(twips, CENTMM_PER_INCH, TWIPS_PER_INCH);
 }
 
 static LONG centmm_to_twips(int mm)
 {
-    return MulDiv(mm, TWIPS_PER_CM, 1000);
+    return MulDiv(mm, TWIPS_PER_INCH, CENTMM_PER_INCH);
 }
 
 static LONG twips_to_pixels(int twips, int dpi)
 {
-    float ret = ((float)twips / ((float)TWIPS_PER_CM * 2.54)) * (float)dpi;
-    return (LONG)ret;
+    return MulDiv(twips, dpi, TWIPS_PER_INCH);
 }
 
 static LONG devunits_to_twips(int units, int dpi)
 {
-    float ret = ((float)units / (float)dpi) * (float)TWIPS_PER_CM * 2.54;
-    return (LONG)ret;
+    return MulDiv(units, TWIPS_PER_INCH, dpi);
 }
 
 
@@ -502,7 +500,7 @@ static void add_ruler_units(HDC hdcRuler, RECT* drawRect, BOOL NewMetrics, long
 
         hdc = CreateCompatibleDC(0);
 
-        CmPixels = twips_to_pixels(TWIPS_PER_CM, GetDeviceCaps(hdc, LOGPIXELSX));
+        CmPixels = twips_to_pixels(centmm_to_twips(1000), GetDeviceCaps(hdc, LOGPIXELSX));
         QuarterCmPixels = (int)((float)CmPixels / 4.0);
 
         hBitmap = CreateCompatibleBitmap(hdc, drawRect->right, drawRect->bottom);

programs/wordpad/wordpad.c

@@ -1271,7 +1271,7 @@ static void dialog_find(LPFINDREPLACEW fr, BOOL replace)
 
 static int current_units_to_twips(float number)
 {
-    int twips = (int)(number * TWIPS_PER_CM);
+    int twips = (int)(number * 1000.0 / (float)CENTMM_PER_INCH *  (float)TWIPS_PER_INCH);
     return twips;
 }
 
@@ -1284,10 +1284,10 @@ static void append_current_units(LPWSTR buffer)
 
 static void number_with_units(LPWSTR buffer, int number)
 {
-    float converted = (float)number / TWIPS_PER_CM;
     static const WCHAR fmt[] = {'%','.','2','f',' ','%','s','\0'};
+    float converted = (float)number / (float)TWIPS_PER_INCH *(float)CENTMM_PER_INCH / 1000.0;
 
-    sprintfW(buffer, fmt, converted, units_cmW);
+    wsprintfW(buffer, fmt, converted, units_cmW);
 }
 
 static BOOL get_comboexlist_selection(HWND hComboEx, LPWSTR wszBuffer, UINT bufferLength)

programs/wordpad/wordpad.h

@@ -19,7 +19,8 @@
 
 #define MAX_STRING_LEN 255
 
-#define TWIPS_PER_CM 567
+#define TWIPS_PER_INCH 1440
+#define CENTMM_PER_INCH 2540
 
 #define ID_FILE_EXIT 1000
 #define ID_FILE_OPEN 1001