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text.py
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text.py
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import unicodedata
from typing import Literal, Optional, overload
import PIL.Image
import skia
Ink = str | int | tuple[int, int, int] | tuple[int, int, int, int]
def get_color(color: Ink) -> int:
if isinstance(color, int):
return color
elif isinstance(color, str):
c = getattr(skia, "Color" + color.upper())
if isinstance(c, int):
return c
else:
raise ValueError("Unknown Color name")
else:
return skia.Color(*color)
class MultiWriter:
def __init__(self,
size: int = 50,
stroke_width: int = 0,
width: int = 0,
height: int = 0,
word_font_path: str = "static/font/SourceHanSans-Medium.ttf",
emoji_font_path="static/font/NotoColorEmoji.ttf"):
self.fontmgr = skia.FontMgr()
self.size = size
self.width = width
self.height = height
self.stroke_width = stroke_width
# 能从文件来就从文件来，从文件中来不了再从系统里随便找一个
self.emoji_font = skia.Font(
skia.Typeface.MakeFromFile(emoji_font_path) or self.fontmgr.matchFamilyStyleCharacter(
"monospace", skia.FontStyle(), ['zh-cn'], ord('👴')), size)
self.word_font = skia.Font(
skia.Typeface.MakeFromFile(word_font_path) or self.fontmgr.matchFamilyStyleCharacter(
"monospace", skia.FontStyle(), ['zh-cn'], ord('你')), size)
self.builder = skia.TextBlobBuilder()
def analyse_font(self, text: str):
analyse = [[]]
seek = 0 if self.height != 1 else self.word_font.measureText("...")
height = 1
def get_last():
try:
return analyse[-1][-1]
except IndexError:
return None
for char in text:
ord_char = ord(char)
if self.word_font.unicharToGlyph(ord_char):
select_font = self.word_font
elif self.emoji_font.unicharToGlyph(ord_char):
select_font = self.emoji_font
elif (k := get_last()) is not None:
select_font = k[1]
else:
select_font = skia.Font(
self.fontmgr.matchFamilyStyleCharacter("monospace", skia.FontStyle(), ['zh-cn'],
ord_char), self.size)
char_size = select_font.measureText(char)
if (self.width and seek + char_size > self.width) or char == "\n":
height += 1
if height == self.height:
analyse.append([])
seek = self.word_font.measureText("...")
elif height == self.height + 1:
analyse[-1].append(["...", self.word_font])
break
else:
analyse.append([])
seek = 0
if char == "\n":
continue
seek += char_size
if (k := get_last()) and k[1] == select_font:
k[0] += char
else:
analyse[-1].append([char, select_font])
return analyse
def build_textblob(self, analyse):
height = self.size
for line in analyse:
seek = 0
for word, font in line:
self.builder.allocRun(word, font, seek, height)
seek += font.measureText(word)
height += self.size + self.stroke_width
def text2pic(self,
text: str,
color: Ink = 0xFFFFFFFF,
background_color: Optional[Ink] = None,
ensure_width: bool = True) -> skia.Image:
# 为了防止有组合字符写不出来
analyse = self.analyse_font(unicodedata.normalize("NFC", text))
self.build_textblob(analyse)
blob = self.builder.make()
if blob is None:
return skia.Surface(1, 1).makeImageSnapshot()
rect = blob.bounds()
width = max(self.width if self.width and ensure_width else int(rect.right()), 1)
height = ((len(analyse) - 1) * (self.stroke_width + self.size) +
int(self.word_font.getSpacing()))
surface = skia.Surface(width, height)
canvas = surface.getCanvas()
if background_color is not None:
canvas.clear(get_color(background_color))
paint = skia.Paint(AntiAlias=True, Color=get_color(color))
canvas.drawTextBlob(blob, 0, 0, paint)
return surface.makeImageSnapshot()
@overload
def text2pic(text: str,
color: Ink = 0xFFFFFFFF,
size: int = 50,
stroke_width: int = 0,
width: int = 0,
height: int = 0,
background_color: Optional[Ink] = None,
ensure_width: bool = True,
word_font_path: str = "static/font/SourceHanSans-Medium.ttf",
emoji_font_path="static/font/NotoColorEmoji.ttf",
ret_type: Literal["bytes"] = "bytes",
image_type: str = "PNG",
quality: int = 80) -> bytes:
...
@overload
def text2pic(text: str,
color: Ink = 0xFFFFFFFF,
size: int = 50,
stroke_width: int = 0,
width: int = 0,
height: int = 0,
background_color: Optional[Ink] = None,
ensure_width: bool = True,
word_font_path: str = "static/font/SourceHanSans-Medium.ttf",
emoji_font_path: str = "static/font/NotoColorEmoji.ttf",
ret_type: Literal["skia"] = "skia") -> skia.Image:
...
@overload
def text2pic(text: str,
color: Ink = "WHITE",
size: int = 50,
stroke_width: int = 0,
width: int = 0,
height: int = 0,
background_color: Optional[Ink] = None,
ensure_width: bool = True,
word_font_path: str = "static/font/SourceHanSans-Medium.ttf",
emoji_font_path: str = "static/font/NotoColorEmoji.ttf",
ret_type: Literal["PIL"] = "PIL") -> PIL.Image.Image:
...
def text2pic(
text: str,
color: Ink = "WHITE",
size: int = 50,
stroke_width: int = 0,
width: int = 0,
height: int = 0,
background_color: Optional[Ink] = None,
ensure_width: bool = True,
word_font_path: str = "static/font/SourceHanSans-Medium.ttf",
emoji_font_path: str = "static/font/NotoColorEmoji.ttf",
ret_type: Literal["skia", "PIL", "bytes"] = "skia",
*args, **kwargs) -> bytes | skia.Image | PIL.Image.Image:
writer = MultiWriter(size, stroke_width, width, height, word_font_path, emoji_font_path)
image = writer.text2pic(text, color, background_color, ensure_width)
if ret_type == "skia":
return image
elif ret_type == "PIL":
return PIL.Image.fromarray(image.convert(alphaType=skia.kUnpremul_AlphaType))
elif ret_type == "bytes":
image_type = getattr(skia.EncodedImageFormat, "k" + kwargs.get("image_type", "PNG").upper())
quality = kwargs.get("quality", 80)
return image.encodeToData(image_type, quality).bytes()
if __name__ == "__main__":
#text = unicodedata.normalize("NFC", "\n\nā\n\náăà")
text = ""
a = MultiWriter(stroke_width=10)
b = a.text2pic(text).encodeToData(skia.kPNG, 100).bytes()
#with open("test.png", "wb") as f:
# f.write(b)