add CreateLogFontIndirectEx function

include/gdi.h

@@ -6793,6 +6793,29 @@ MG_EXPORT PLOGFONT GUIAPI CreateLogFontByName (const char* font_name);
  */
 MG_EXPORT PLOGFONT GUIAPI CreateLogFontIndirect (LOGFONT* logfont);
 
+/**
+ * \fn PLOGFONT GUIAPI CreateLogFontIndirectEx (LOGFONT* logfont, int rotation)
+ * \brief Creates a new logical font indirectly from a LOGFONT structure with
+ * a rotation degrees.
+ *
+ * This function creates a new logical font from information in the LOGFONT object
+ * \a logfont and the new rotation value \a rotation.
+ *
+ * Since 3.4.0.
+ *
+ * \param logfont The pointer to the reference logical font structure.
+ * \param rotation The rotation of the logical font, it is in units of
+ *        tenth degrees. Note that you can specify rotation only for
+ *        vector fonts (use FreeType2 font engine).
+ *
+ * \return The pointer to the logical font created, NULL on error.
+ *        If \a rotation is not zero and the devfonts of the \a logfont
+ *        does not support rotation, it returns NULL.
+ *
+ * \sa CreateLogFont, CreateLogFontIndirect, SelectFont
+ */
+MG_EXPORT PLOGFONT GUIAPI CreateLogFontIndirectEx (LOGFONT* logfont, int rotation);
+
 /**
  * \fn void GUIAPI DestroyLogFont (PLOGFONT log_font)
  * \brief Destroys a logical font.

src/font/logfont.c

@@ -136,7 +136,7 @@ static PLOGFONT gdiCreateLogFont (const char* type, const char* family,
         return INV_LOGFONT;
     }
 
-    /*check if sbc_devfont and mbc_devfont support rotation*/
+    /* check if sbc_devfont and mbc_devfont support rotation */
     if (get_rotation(log_font, sbc_devfont, rotation) == rotation
             && (!mbc_devfont || get_rotation(log_font, mbc_devfont, rotation) == rotation))
         log_font->rotation = rotation;
@@ -287,6 +287,50 @@ PLOGFONT GUIAPI CreateLogFontIndirect (LOGFONT *logfont)
     return font;
 }
 
+PLOGFONT GUIAPI CreateLogFontIndirectEx (LOGFONT *logfont, int rotation)
+{
+    PLOGFONT newfont;
+    DEVFONT* sbc_devfont, *mbc_devfont;
+
+    if (!logfont) return NULL;
+
+    // VincentWei: make sure the logfont has the key for resource manager.
+    if ((newfont = (PLOGFONT)malloc (sizeof (FONT_RES))) == NULL)
+        return INV_LOGFONT;
+
+    // VincentWei: make sure the logfont has an invalid key for resource manager.
+    memcpy (newfont, logfont, sizeof(LOGFONT));
+    ((FONT_RES *)newfont)->key = -1;
+
+    sbc_devfont = logfont->sbc_devfont;
+    mbc_devfont = logfont->mbc_devfont;
+
+    newfont->rotation = rotation;
+    if (logfont->rotation == 0 && rotation != 0) {
+        /* check if sbc_devfont and mbc_devfont support rotation */
+        if (get_rotation(newfont, sbc_devfont, rotation) == rotation
+                && (!mbc_devfont || get_rotation(newfont, mbc_devfont, rotation) == rotation))
+            newfont->rotation = rotation;
+        else
+            newfont->rotation = 0;
+    }
+
+    if (sbc_devfont->font_ops->new_instance)
+        sbc_devfont = (*sbc_devfont->font_ops->new_instance) (newfont, sbc_devfont, TRUE);
+    if (sbc_devfont == NULL) {
+        free (newfont);
+        return INV_LOGFONT;
+    }
+
+    if (mbc_devfont && mbc_devfont->font_ops->new_instance)
+        mbc_devfont = (*mbc_devfont->font_ops->new_instance) (newfont, mbc_devfont, FALSE);
+
+    newfont->sbc_devfont = sbc_devfont;
+    newfont->mbc_devfont = mbc_devfont;
+
+    return newfont;
+}
+
 PLOGFONT GUIAPI CreateLogFont (const char* type, const char* family,
     const char* charset, char weight, char slant, char flip,
     char other, char underline, char struckout, int size, int rotation)