Merge pull request #333 from wiredfool/paddywwoof-truetype

Vertical Alignment of ttf rendering

PIL/ImageColor.py

@@ -102,6 +102,8 @@ def getcolor(color, mode):
     if mode == "RGB":
         return color
     if mode == "RGBA":
+        if len(color) == 3:
+          color = (color + (255,))
         r, g, b, a = color
         return r, g, b, a
     if Image.getmodebase(mode) == "L":

PIL/ImageFont.py

@@ -157,6 +157,9 @@ class FreeTypeFont:
     def getsize(self, text):
         return self.font.getsize(text)[0]
 
+    def getoffset(self, text):
+        return self.font.getsize(text)[1]
+
     def getmask(self, text, mode=""):
         return self.getmask2(text, mode)[0]
 
@@ -183,7 +186,7 @@ class TransposedFont:
         self.orientation = orientation # any 'transpose' argument, or None
 
     def getsize(self, text):
-        w, h = self.font.getsize(text)
+        w, h = self.font.getsize(text)[0]
         if self.orientation in (Image.ROTATE_90, Image.ROTATE_270):
             return h, w
         return w, h

Tests/test_imagefont.py

@@ -35,7 +35,7 @@ def test_font_with_filelike():
     #shared_bytes = _font_as_bytes()
     #assert_no_exception(lambda: _render(shared_bytes))
     #assert_exception(Exception, lambda: _render(shared_bytes))
-    _clean
+    _clean()
 
 def test_font_with_open_file():
     with open(font_path, 'rb') as f:
@@ -67,3 +67,21 @@ def test_render_equal():
 
     assert_image_equal(img_path, img_filelike)
     _clean()
+
+
+def test_render_multiline():
+    im = Image.new(mode='RGB', size=(300,100))
+    ttf = ImageFont.truetype(font_path, font_size)
+    draw = ImageDraw.Draw(im)
+    line_spacing = draw.textsize('A', font=ttf)[1] + 8
+    lines = ['hey you', 'you are awesome', 'this looks awkward']
+    y = 0
+    for line in lines:
+        draw.text((0, y), line, font=ttf)
+        y += line_spacing
+
+    target = 'Tests/images/multiline_text.png'
+    target_img = Image.open(target)
+
+    assert_image_equal(im, target_img)
+    

_imagingft.c

@@ -183,7 +183,7 @@ font_getsize(FontObject* self, PyObject* args)
     int i, x, y_max, y_min;
     FT_ULong ch;
     FT_Face face;
-    int xoffset;
+    int xoffset, yoffset;
     FT_Bool kerning = FT_HAS_KERNING(self->face);
     FT_UInt last_index = 0;
 
@@ -203,7 +203,7 @@ font_getsize(FontObject* self, PyObject* args)
     }
 
     face = NULL;
-    xoffset = 0;
+    xoffset = yoffset = 0;
     y_max = y_min = 0;
 
     for (x = i = 0; font_getchar(string, i, &ch); i++) {
@@ -231,7 +231,11 @@ font_getsize(FontObject* self, PyObject* args)
             y_max = bbox.yMax;
         if (bbox.yMin < y_min)
             y_min = bbox.yMin;
-
+            
+        /* find max distance of baseline from top */
+        if (face->glyph->metrics.horiBearingY > yoffset)
+            yoffset = face->glyph->metrics.horiBearingY;
+            
         last_index = index;
     }
 
@@ -248,12 +252,15 @@ font_getsize(FontObject* self, PyObject* args)
             face->glyph->metrics.horiBearingX;
         if (offset < 0)
             x -= offset;
+        /* difference between the font ascender and the distance of
+         * the baseline from the top */
+        yoffset = PIXEL(self->face->size->metrics.ascender - yoffset);
     }
 
     return Py_BuildValue(
         "(ii)(ii)",
         PIXEL(x), PIXEL(y_max - y_min),
-        PIXEL(xoffset), 0
+        PIXEL(xoffset), yoffset
         );
 }