From: Antonio Larrosa <alarrosa@suse.com>
Subject: Add support to use bitmap font transformations from python

This is needed by ttf-converter/xorg-x11-fonts in order to generate
an Italic version of MUTT-ClearlyU-Wide at package build time.

Index: fontforge-20200314/fontforge/python.c
===================================================================
--- fontforge-20200314.orig/fontforge/python.c
+++ fontforge-20200314/fontforge/python.c
@@ -35,6 +35,7 @@
 #include "autotrace.h"
 #include "autowidth2.h"
 #include "bitmapcontrol.h"
+#include "bvedit.h"
 #include "cvexport.h"
 #include "cvimages.h"
 #include "cvundoes.h"
@@ -11933,6 +11934,44 @@ return( -1 );
 return( 0 );
 }
 
+static PyObject *PyFFFont_bitmapTransform(PyFF_Font *self, PyObject *args) {
+    SplineFont *sf = self->fv->sf;
+    BDFFont *bdf;
+    char *funcname;
+    int xoff, yoff, i;
+    enum bvtools type;
+
+    if ( CheckIfFontClosed(self) )
+        return( NULL );
+
+    if ( !PyArg_ParseTuple(args,"sii", &funcname, &xoff, &yoff))
+        return( NULL );
+
+    if (strcmp(funcname, "fliph") == 0)
+        type = bvt_fliph;
+    else if (strcmp(funcname, "flipv") == 0)
+        type = bvt_flipv;
+    else if (strcmp(funcname, "rotate90cw") == 0)
+        type = bvt_rotate90cw;
+    else if (strcmp(funcname, "rotate90ccw") == 0)
+        type = bvt_rotate90ccw;
+    else if (strcmp(funcname, "rotate180") == 0)
+        type = bvt_rotate180;
+    else if (strcmp(funcname, "skew") == 0)
+        type = bvt_skew;
+    else if (strcmp(funcname, "transmove") == 0)
+        type = bvt_transmove;
+    else Py_RETURN( self );
+
+    for ( bdf=sf->bitmaps; bdf!=NULL; bdf=bdf->next )
+	for ( i=0; i<bdf->glyphcnt; ++i )
+            if ( bdf->glyphs[i]!=NULL )
+	        BCTransFunc(bdf->glyphs[i], type, xoff, yoff);
+
+Py_RETURN( self );
+}
+
+
 static PyObject *PyFF_Font_get_bitmapSizes(PyFF_Font *self, void *UNUSED(closure)) {
     PyObject *tuple;
     int cnt;
@@ -18179,6 +18218,7 @@ Py_RETURN( self );
 
 PyMethodDef PyFF_Font_methods[] = {
     { "appendSFNTName", (PyCFunction) PyFFFont_appendSFNTName, METH_VARARGS, "Adds or replaces a name in the sfnt 'name' table. Takes three arguments, a language, a string id, and the string value" },
+    { "bitmapTransform", (PyCFunction) PyFFFont_bitmapTransform, METH_VARARGS, "Transforms all bitmap glyphs."},
     { "close", (PyCFunction) PyFFFont_close, METH_NOARGS, "Frees up memory for the current font. Any python pointers to it will become invalid." },
     { "compareFonts", (PyCFunction) PyFFFont_compareFonts, METH_VARARGS, "Compares two fonts and stores the result into a file"},
     { "save", (PyCFunction) PyFFFont_Save, METH_VARARGS, "Save the current font to a sfd file" },