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import json
import webcolors
def closest_color(requested_color):
min_colors = {}
for key, name in webcolors.CSS3_HEX_TO_NAMES.items():
r_c, g_c, b_c = webcolors.hex_to_rgb(key)
rd = (r_c - requested_color[0]) ** 2
gd = (g_c - requested_color[1]) ** 2
bd = (b_c - requested_color[2]) ** 2
min_colors[(rd + gd + bd)] = name
return min_colors[min(min_colors.keys())]
def convert_rgb_to_names(rgb_tuple):
try:
color_name = webcolors.rgb_to_name(rgb_tuple)
except ValueError:
color_name = closest_color(rgb_tuple)
return color_name
class PromptFormat():
def __init__(
self,
font_path: str = 'assets/font_idx_512.json',
color_path: str = 'assets/color_idx.json',
):
with open(font_path, 'r') as f:
self.font_dict = json.load(f)
with open(color_path, 'r') as f:
self.color_dict = json.load(f)
def format_checker(self, texts, styles):
assert len(texts) == len(styles), 'length of texts must be equal to length of styles'
for style in styles:
assert style['font-family'] in self.font_dict, f"invalid font-family: {style['font-family']}"
rgb_color = webcolors.hex_to_rgb(style['color'])
color_name = convert_rgb_to_names(rgb_color)
assert color_name in self.color_dict, f"invalid color hex {color_name}"
def format_prompt(self, texts, styles):
self.format_checker(texts, styles)
prompt = ""
'''
Text "{text}" in {color}, {type}.
'''
for text, style in zip(texts, styles):
text_prompt = f'Text "{text}"'
attr_list = []
# format color
hex_color = style["color"]
rgb_color = webcolors.hex_to_rgb(hex_color)
color_name = convert_rgb_to_names(rgb_color)
attr_list.append(f"<color-{self.color_dict[color_name]}>")
# format font
attr_list.append(f"<font-{self.font_dict[style['font-family']]}>")
attr_suffix = ", ".join(attr_list)
text_prompt += " in " + attr_suffix
text_prompt += ". "
prompt = prompt + text_prompt
return prompt
class MultilingualPromptFormat():
def __init__(
self,
font_path: str = 'assets/multilingual_cn-en_font_idx.json',
color_path: str = 'assets/color_idx.json',
):
with open(font_path, 'r') as f:
self.font_dict = json.load(f)
with open(color_path, 'r') as f:
self.color_dict = json.load(f)
def format_checker(self, texts, styles):
assert len(texts) == len(styles), 'length of texts must be equal to length of styles'
for style in styles:
assert style['font-family'] in self.font_dict, f"invalid font-family: {style['font-family']}"
rgb_color = webcolors.hex_to_rgb(style['color'])
color_name = convert_rgb_to_names(rgb_color)
assert color_name in self.color_dict, f"invalid color hex {color_name}"
def format_prompt(self, texts, styles):
self.format_checker(texts, styles)
prompt = ""
'''
Text "{text}" in {color}, {type}.
'''
for text, style in zip(texts, styles):
text_prompt = f'Text "{text}"'
attr_list = []
# format color
hex_color = style["color"]
rgb_color = webcolors.hex_to_rgb(hex_color)
color_name = convert_rgb_to_names(rgb_color)
attr_list.append(f"<color-{self.color_dict[color_name]}>")
# format font
attr_list.append(f"<{style['font-family'][:2]}-font-{self.font_dict[style['font-family']]}>")
attr_suffix = ", ".join(attr_list)
text_prompt += " in " + attr_suffix
text_prompt += ". "
prompt = prompt + text_prompt
return prompt
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