Merge pull request #2825 from wiredfool/fix_pcf_tests

Fix PCF/PILFont

Tests/fonts/LICENSE.txt

@@ -4,3 +4,10 @@ NotoNastaliqUrdu-Regular.ttf:
 (from https://github.com/googlei18n/noto-fonts)
 
 All Noto fonts are published under the SIL Open Font License (OFL) v1.1 (http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL), which allows you to copy, modify, and redistribute them if you need to.
+
+
+10x20-ISO8859-1.pcf
+
+(from https://packages.ubuntu.com/xenial/xfonts-base)
+
+"Public domain font.  Share and enjoy."

Tests/test_font_pcf.py

@@ -5,7 +5,7 @@ from PIL import ImageFont, ImageDraw
 
 codecs = dir(Image.core)
 
-fontname = "Tests/fonts/helvO18.pcf"
+fontname = "Tests/fonts/10x20-ISO8859-1.pcf"
 
 message = "hello, world"
 
@@ -20,11 +20,20 @@ class TestFontPcf(PillowTestCase):
         with open(fontname, "rb") as test_file:
             font = PcfFontFile.PcfFontFile(test_file)
         self.assertIsInstance(font, FontFile.FontFile)
-        self.assertEqual(len([_f for _f in font.glyph if _f]), 192)
+        #check the number of characters in the font
+        self.assertEqual(len([_f for _f in font.glyph if _f]), 223)
 
         tempname = self.tempfile("temp.pil")
         self.addCleanup(self.delete_tempfile, tempname[:-4]+'.pbm')
         font.save(tempname)
+
+        with Image.open(tempname.replace('.pil', '.pbm')) as loaded:
+            with Image.open('Tests/fonts/10x20.pbm') as target:
+                self.assert_image_equal(loaded, target)
+
+        with open(tempname, 'rb') as f_loaded:
+            with open('Tests/fonts/10x20.pil', 'rb') as f_target:
+                self.assertEqual(f_loaded.read(), f_target.read())
         return tempname
 
     def test_sanity(self):
@@ -34,25 +43,35 @@ class TestFontPcf(PillowTestCase):
         with open("Tests/images/flower.jpg", "rb") as fp:
             self.assertRaises(SyntaxError, PcfFontFile.PcfFontFile, fp)
 
-    def xtest_draw(self):
-
+    def test_draw(self):
         tempname = self.save_font()
         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")
+        im = Image.new("L", (130,30), "white")
+        draw = ImageDraw.Draw(im)
+        draw.text((0, 0), message, 'black', font=font)
+        with Image.open('Tests/images/test_draw_pbm_target.png') as target:
+            self.assert_image_similar(im, target, 0)
+            
+    def test_textsize(self):
+        tempname = self.save_font()
+        font = ImageFont.load(tempname)
+        for i in range(255):
+            (dx,dy) = font.getsize(chr(i))
+            self.assertEqual(dy, 20)
+            self.assertIn(dx, (0,10))
+        for l in range(len(message)):
+            msg = message[:l+1]
+            self.assertEqual(font.getsize(msg), (len(msg)*10,20))
 
     def _test_high_characters(self, message):
-
         tempname = self.save_font()
         font = ImageFont.load(tempname)
-        image = Image.new("L", font.getsize(message), "white")
-        draw = ImageDraw.Draw(image)
-        draw.text((0, 0), message, font=font)
+        im = Image.new("L", (750,30) , "white")
+        draw = ImageDraw.Draw(im)
+        draw.text((0, 0), message, "black", font=font)
+        with Image.open('Tests/images/high_ascii_chars.png') as target:
+            self.assert_image_similar(im, target, 0)
 
-        compare = Image.open('Tests/images/high_ascii_chars.png')
-        self.assert_image_equal(image, compare)
 
     def test_high_characters(self):
         message = "".join(chr(i+1) for i in range(140, 232))

Tests/test_imagefont.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 from helper import unittest, PillowTestCase
 
 from PIL import Image, ImageDraw, ImageFont, features
@@ -409,7 +410,12 @@ class TestImageFont(PillowTestCase):
         draw.text((10, 10), '', font=font)
         self.assert_image_equal(im, target)
         
-       
+    def test_unicode_pilfont(self):
+        # should not segfault, should return UnicodeDecodeError
+        # issue #2826
+        font = ImageFont.load_default()
+        with self.assertRaises(UnicodeEncodeError):
+            font.getsize(u"’")
 
 
     def _test_fake_loading_font(self, path_to_fake, fontname):

_imaging.c

@@ -2207,35 +2207,25 @@ void _font_text_asBytes(PyObject* encoded_string, unsigned char** text){
 
     if (PyUnicode_CheckExact(encoded_string)){
         bytes = PyUnicode_AsLatin1String(encoded_string);
+        if (!bytes) {
+            return;
+        }
         PyBytes_AsStringAndSize(bytes, &buffer, &len);
     } else if (PyBytes_Check(encoded_string)) {
         PyBytes_AsStringAndSize(encoded_string, &buffer, &len);
     }
 
-    *text = calloc(len,1);
+    *text = calloc(len+1,1);
     if (*text) {
         memcpy(*text, buffer, len);
+    } else {
+        ImagingError_MemoryError();
     }
     if (bytes) {
         Py_DECREF(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)) {
-        PyString_AsStringAndSize(encoded_string, &buffer, &len);
-        *text = calloc(len,1);
-        if (*text) {
-            memcpy(*text, buffer, len);
-        }
-        return;
-    }
-        
-#endif
 }
 
 
@@ -2260,7 +2250,6 @@ _font_getmask(ImagingFontObject* self, PyObject* args)
 
     _font_text_asBytes(encoded_string, &text);
     if (!text) {
-        ImagingError_MemoryError();
         return NULL;
     }
 
@@ -2314,7 +2303,6 @@ _font_getsize(ImagingFontObject* self, PyObject* args)
 
     _font_text_asBytes(encoded_string, &text);
     if (!text) {
-        ImagingError_MemoryError();
         return NULL;
     }