def renderLine(self, raw: str, image: Image, y: int, height: int,
font: ImageFont.FreeTypeFont) -> ImageDraw:
"""
Render a single line
"""
# Get the number of blanks
blanks = raw.count("_blank_")
no_line = raw.replace("_blank_", "")
ascent, descent = font.getmetrics()
w, h = font.getsize(no_line)
(width, baseline), (offset_x, offset_y) = font.font.getsize(no_line)
if height < h:
line = ascent
else:
line = height - descent / 2
y = y - height + h
ascent, descent = font.getmetrics()
draw = ImageDraw.Draw(image)
# draw.line((0, y, w, y), fill=(255, 0, 0))
# draw.line((0, y + height, w, y + height), fill=(0, 255, 0))
# draw.line((0, y + h, w, y + h), fill=(0, 0, 255))
if blanks > 0:
# Get the size of each blank.
blank_size = (image.size[0] - w) / blanks
groups = raw.split("_blank_")
# Render each group
x = 0
for group in groups:
# Draw the text
draw.text((x, y), group, self.color, font)
w, _ = font.getsize(group)
x += w
if blanks > 0:
# Draw the line
draw.line(
((x + 5, y + line), (x + blank_size - 5, y + line)),
fill=self.color,
width=2)
x += blank_size
blanks -= 1
return
draw.text((0, y), raw, self.color, font)
def __get_x_centered(text_line: str, width_avail: int,
font: ImageFont.FreeTypeFont) -> int:
"""Get the X coordinate at which to draw a text line horizontally-centered.
Parameters
----------
text_line : str
Text line to draw.
width_avail : int
Width available to draw (essentially the image's width).
font : ImageFont.FreeTypeFont
Font used to draw.
Returns
-------
int
The X coordinate at which to draw the text line horizontally-centered.
"""
# https://stackoverflow.com/a/46220683/9263761
ascent, descent = font.getmetrics()
# Width needed to draw the line
width_text = font.getmask(text_line).getbbox()[2] + font.font.getsize(
text_line)[1][0]
# Calculate the centered X coordinate
x = (width_avail - width_text) // 2
# Return the first Y coordinate and a list with the height of each line
return x
def __get_y_and_heights(text_wrapped: List[str], height_avail: int,
margin: float,
font: ImageFont.FreeTypeFont) -> Tuple[int, List[int]]:
"""Calculate the height needed to draw all text lines, vertically centered.
Return the vertical coordinate to draw the first line at and a list of the heights for each line (margin included).
Parameters
----------
text_wrapped : List[str]
Lines of text to draw.
height_avail : int
Height available to draw in (essentially the image's height).
margin : float
Vertical margin between text lines.
font : ImageFont.FreeTypeFont
Font used to draw.
Returns
-------
Tuple[int, List[int]]
The vertical coordinate of the first text line and a list with the heights of all lines.
"""
# https://stackoverflow.com/a/46220683/9263761
ascent, descent = font.getmetrics()
# Calculate the height needed to draw each line of text
height_lines = [
font.getmask(text_line).getbbox()[3] +
font.font.getsize(text_line)[1][1] + margin
for text_line in text_wrapped
]
# The last line doesn't have a bottom margin
height_lines[-1] -= margin
# Total height needed
height_text = sum(height_lines)
# Calculate the Y coordinate at which to draw the first line of text
y = (height_avail - height_text) // 2
# Return the first Y coordinate and a list with the height of each line
return (y, height_lines)
def getsize(font: FreeTypeFont, text_str: str) -> Tuple[int, int]:
"""get the size of text"""
if USE_PIL:
# original behavior
# size = font.getsize(text_str)
# new behavior
width, _ = font.getsize(text_str)
ascent, descent = font.getmetrics()
height = ascent + descent
size = (width, height)
else:
info = text_scala.get_info(text_str, _font_to_tuple(font), 0,
BORDER_DEFAULT)
# Important note! Info height and width may not include some antialiasing pixels!
# import numpy as np
# column_sums = np.sum(img, axis=0)
# present = np.where(column_sums > 0)[0]
# calculated_width = (present[-1] - present[0]) + 1
# print("metrics width:", info["width"])
# print("calculated width:", calculated_width)
size = (info["width"], info["height"])
return size
