Merge pull request #517 from wiredfool/pcf

Fix support for characters >128 using .pcf or .pil fonts in Py3k

Tests/test_font_pcf.py

@@ -22,10 +22,28 @@ def test_sanity():
 
     font.save(tempname)
 
-def test_draw():
+def xtest_draw():
 
     font = ImageFont.load(tempname)
     image = Image.new("L", font.getsize(message), "white")
     draw = ImageDraw.Draw(image)
     draw.text((0, 0), message, font=font)
     # assert_signature(image, "7216c60f988dea43a46bb68321e3c1b03ec62aee")
+
+def _test_high_characters(message):
+
+    font = ImageFont.load(tempname)
+    image = Image.new("L", font.getsize(message), "white")
+    draw = ImageDraw.Draw(image)
+    draw.text((0, 0), message, font=font)
+
+    compare = Image.open('Tests/images/high_ascii_chars.png')
+    assert_image_equal(image, compare)
+
+def test_high_characters():
+    message = "".join([chr(i+1) for i in range(140,232)])
+    _test_high_characters(message)
+    # accept bytes instances in Py3. 
+    if bytes is not str:
+        _test_high_characters(message.encode('latin1'))
+

_imaging.c

@@ -2239,30 +2239,66 @@ textwidth(ImagingFontObject* self, const unsigned char* text)
     return xsize;
 }
 
+void _font_text_asBytes(PyObject* encoded_string, unsigned char** text){
+    PyObject* bytes = NULL;
+
+    *text = NULL;
+
+    if (PyUnicode_CheckExact(encoded_string)){
+        bytes = PyUnicode_AsLatin1String(encoded_string);
+    } else if (PyBytes_Check(encoded_string)) {
+        bytes = encoded_string;
+    }
+    if (bytes) {
+        *text = (unsigned char*)PyBytes_AsString(bytes);
+        return;
+    } 
+
+#if PY_VERSION_HEX < 0x03000000
+    /* likely case here is py2.x with an ordinary string.
+       but this isn't defined in Py3.x */
+    if (PyString_Check(encoded_string)) {
+        *text = (unsigned char *)PyString_AsString(encoded_string);
+    } 
+#endif
+}
+    
+
 static PyObject*
 _font_getmask(ImagingFontObject* self, PyObject* args)
 {
     Imaging im;
     Imaging bitmap;
     int x, b;
+    int i=0;
     int status;
     Glyph* glyph;
 
+    PyObject* encoded_string;
+
     unsigned char* text;
     char* mode = "";
-    if (!PyArg_ParseTuple(args, "s|s:getmask", &text, &mode))
+
+    if (!PyArg_ParseTuple(args, "O|s:getmask",  &encoded_string, &mode)){
         return NULL;
+    }
+
+    _font_text_asBytes(encoded_string, &text);
+    if (!text) {
+        return NULL;
+    }
 
     im = ImagingNew(self->bitmap->mode, textwidth(self, text), self->ysize);
-    if (!im)
+    if (!im) {
         return NULL;
+    }
 
     b = 0;
     (void) ImagingFill(im, &b);
 
     b = self->baseline;
-    for (x = 0; *text; text++) {
+    for (x = 0; text[i]; i++) {
-        glyph = &self->glyphs[*text];
+        glyph = &self->glyphs[text[i]];
         bitmap = ImagingCrop(
             self->bitmap,
             glyph->sx0, glyph->sy0, glyph->sx1, glyph->sy1
@@ -2279,7 +2315,6 @@ _font_getmask(ImagingFontObject* self, PyObject* args)
         x = x + glyph->dx;
         b = b + glyph->dy;
     }
-
     return PyImagingNew(im);
 
   failed:
@@ -2291,9 +2326,16 @@ static PyObject*
 _font_getsize(ImagingFontObject* self, PyObject* args)
 {
     unsigned char* text;
-    if (!PyArg_ParseTuple(args, "s:getsize", &text))
+    PyObject* encoded_string;
+
+    if (!PyArg_ParseTuple(args, "O:getsize", &encoded_string))
         return NULL;
 
+    _font_text_asBytes(encoded_string, &text);
+    if (!text) {
+        return NULL;
+    }
+
     return Py_BuildValue("ii", textwidth(self, text), self->ysize);        
 }