Stroke Text Tittles Not Working Correctly

[bradley-pearson6597]

What did you do?

When trying to create a piece of text with a stroke fill the tittles on i and j do not look correct.

What did you expect to happen?

I would expect that the stroke would fill all the way to the edge of the inner fill for the tittles.

What actually happened?

The tittles on the i and j look like they have a thin outline around them rather than filling to the tittle.

What are your OS, Python and Pillow versions?

• OS: Windows
• Python 3.11:
• Pillow: 10.3.0

Pillow 10.3.0
Python 3.11.5 | packaged by Anaconda, Inc. | (main, Sep 11 2023, 13:26:23) [MSC v.1916 64 bit (AMD64)]
Python executable is C:\Users\bradl\anaconda3\python.exe
System Python files loaded from C:\Users\bradl\anaconda3
--------------------------------------------------------------------
Python Pillow modules loaded from C:\Users\USER\anaconda3\Lib\site-packages\PIL
Binary Pillow modules loaded from C:\Users\USER\anaconda3\Lib\site-packages\PIL
--------------------------------------------------------------------
--- PIL CORE support ok, compiled for 10.3.0
--- TKINTER support ok, loaded 8.6
--- FREETYPE2 support ok, loaded 2.13.2
--- LITTLECMS2 support ok, loaded 2.16
--- WEBP support ok, loaded 1.3.2
--- WEBP Transparency support ok
--- WEBPMUX support ok
--- WEBP Animation support ok
--- JPEG support ok, compiled for libjpeg-turbo 3.0.2
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.2
--- ZLIB (PNG/ZIP) support ok, loaded 1.3.1
--- LIBTIFF support ok, loaded 4.6.0
*** RAQM (Bidirectional Text) support not installed
*** LIBIMAGEQUANT (Quantization method) support not installed
*** XCB (X protocol) support not installed

from PIL import Image, ImageDraw, ImageFont

# Create an image with a white background
width, height = 2000, 400
image = Image.new("RGB", (width, height), "white")

# Load a font
font_size = 100
font = ImageFont.load_default(font_size)

# Create a drawing context
draw = ImageDraw.Draw(image)

# Define text and positions
text = 'i j h o w'
text_position = (100, 100)  # Position of the text
stroke_width = 14  # Width of the stroke
stroke_fill = "black"  # Color of the stroke
text_fill = "blue"  # Color of the text

# Draw text with stroke
draw.text(
    text_position,
    text,
    font=font,
    fill=text_fill,
    stroke_width=stroke_width,
    stroke_fill=stroke_fill,
)

image.save("testing.png", dpi=(300, 300))

[radarhere]

Taking a look, the gap between the regular text and the stroked text is generated by FreeType. It's not unique to our default font - the same issue occurs with Times New Roman.ttf on my macOS machine.

I've contacted FreeType support to see if this is considered a bug.

[radarhere]

We've received a response about how FreeType handles this - #8701 (comment)

The algorithms are rather complicated. I suspect the problem with the inside border arises when the stroker radius exceeds the stem width or the dot radius. The inside border is ill-defined in this case. I doubt this can be fixed. This could happen to the outside border too but much less frequently.

I've created #8701 to adjust Pillow to fix the result.