Testing complex text layout.

PIL/ImageDraw.py

@@ -203,12 +203,10 @@ class ImageDraw(object):
         return text.split(split_character)
 
     def text(self, xy, text, fill=None, font=None, anchor=None,
-             *args, **kwargs, direction=None, features=None):
+             direction=None, features=None, *args, **kwargs):
-
         if self._multiline_check(text):
             return self.multiline_text(xy, text, fill, font, anchor,
-                                       *args, **kwargs, direction=direction, features=features)
+                                       direction=direction, features=features, *args, **kwargs)
-
         ink, fill = self._getink(fill)
         if font is None:
             font = self.getfont()

PIL/features.py

@@ -5,6 +5,7 @@ modules = {
     "tkinter": "PIL._tkinter_finder",
     "freetype2": "PIL._imagingft",
     "littlecms2": "PIL._imagingcms",
+    "raqm": "PIL._imagingft",
     "webp": "PIL._webp",
 }
 

Tests/test_imagefontctl.py

@@ -0,0 +1,136 @@
+# -*- coding: utf-8 -*-
+from helper import unittest, PillowTestCase
+from PIL import Image
+from PIL import ImageDraw
+
+FONT_SIZE = 20
+FONT_PATH = "Tests/fonts/DejaVuSans.ttf"
+
+try:
+    from PIL import ImageFont
+
+    # check if raqm is available
+    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+    im = Image.new(mode='RGB', size=(300, 100))
+    draw = ImageDraw.Draw(im)
+    draw.text((0, 0), 'TEST', font=ttf, fill=500, direction='ltr')
+
+    class TestImagecomplextext(PillowTestCase):
+
+        def test_complex_text(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'اهلا عمان', font=ttf, fill=500)
+
+            target = 'Tests/images/test_text.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_y_offset(self):
+            ttf = ImageFont.truetype("Tests/fonts/NotoNastaliqUrdu-Regular.ttf", FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'هنا عمان', font=ttf, fill=500)
+
+            target = 'Tests/images/test_y_offset.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_complex_unicode_text(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), u'مرحبا بكم', font=ttf, fill=500)
+
+            target = 'Tests/images/test_complex_unicode_text.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_text_direction_rtl(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'English عربي', font=ttf, fill=500, direction='rtl')
+
+            target = 'Tests/images/test_direction_rtl.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_text_direction_ltr(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0),  'سلطنة عمان Oman', font=ttf, fill=500, direction='ltr')
+
+            target = 'Tests/images/test_direction_ltr.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_text_direction_rtl2(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'Oman سلطنة عمان', font=ttf, fill=500, direction='rtl')
+
+            target = 'Tests/images/test_direction_ltr.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_ligature_features(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'filling', font=ttf, fill=500, features=['-liga'])
+
+            target = 'Tests/images/test_ligature_features.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_kerning_features(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'TeToAV', font=ttf, fill=500, features=['-kern'])
+
+            target = 'Tests/images/test_kerning_features.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+        def test_arabictext_features(self):
+            ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
+
+            im = Image.new(mode='RGB', size=(300, 100))
+            draw = ImageDraw.Draw(im)
+            draw.text((0, 0), 'اللغة العربية', font=ttf, fill=500, features=['-fina','-init','-medi'])
+
+            target = 'Tests/images/test_arabictext_features.png'
+            target_img = Image.open(target)
+
+            self.assert_image_similar(im, target_img, .5)
+
+except (KeyError, ImportError):
+    class TestImagecomplextext(PillowTestCase):
+        def test_skip(self):
+            self.skipTest("KeyError")
+
+if __name__ == '__main__':
+    unittest.main()
+
+# End of file

_imagingft.c

@@ -588,17 +588,21 @@ font_render(FontObject* self, PyObject* args)
 
     for (x = i = 0; i < count; i++) {
         if (i == 0 && self->face->glyph->metrics.horiBearingX < 0)
-            x = -PIXEL(self->face->glyph->metrics.horiBearingX);
+            x = -self->face->glyph->metrics.horiBearingX;
         index = glyph_info[i].index;
 
         error = FT_Load_Glyph(self->face, index, load_flags);
         if (error)
             return geterror(error);
 
+        if (i == 0 && self->face->glyph->metrics.horiBearingX < 0) {
+            x = -self->face->glyph->metrics.horiBearingX;
+        }
+
         glyph = self->face->glyph;
 
         source = (unsigned char*) glyph->bitmap.buffer;
-        xx = x + glyph->bitmap_left;
+        xx = PIXEL(x) + glyph->bitmap_left;
         xx += PIXEL(glyph_info[i].x_offset);
         x0 = 0;
         x1 = glyph->bitmap.width;
@@ -644,7 +648,7 @@ font_render(FontObject* self, PyObject* args)
                 source += glyph->bitmap.pitch;
             }
         }
-        x += PIXEL(glyph_info[i].x_advance);
+        x += glyph_info[i].x_advance;
     }
     PyMem_Del(glyph_info);
     Py_RETURN_NONE;

selftest.py

@@ -183,7 +183,8 @@ if __name__ == "__main__":
         ("jpg", "JPEG"),
         ("jpg_2000", "OPENJPEG (JPEG2000)"),
         ("zlib", "ZLIB (PNG/ZIP)"),
-        ("libtiff", "LIBTIFF")
+        ("libtiff", "LIBTIFF"),
+        ("raqm", "RAQM")
     ]:
         if features.check(name):
             print("---", feature, "support ok")