mirror of
https://github.com/comfyanonymous/ComfyUI.git
synced 2026-07-03 13:19:23 +08:00
151 lines
7.4 KiB
Python
151 lines
7.4 KiB
Python
import numpy as np
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import torch
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from PIL import Image as PILImage, ImageColor, ImageDraw, ImageFont
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from typing_extensions import override
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from comfy_api.latest import ComfyExtension, IO
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class TextOverlay(IO.ComfyNode):
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@classmethod
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def define_schema(cls):
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return IO.Schema(
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node_id="TextOverlay",
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display_name="Text Overlay",
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category="image/text",
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description="Overlay text on an image or batch of images.",
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search_aliases=["text", "label", "caption", "subtitle", "watermark", "title", "addlabel", "overlay"],
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inputs=[
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IO.Image.Input("image"),
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IO.String.Input("text", multiline=True, default=""),
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IO.Combo.Input("position", options=["top", "bottom"], default="top"),
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IO.Combo.Input("align", options=["left", "center", "right"], default="left"),
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IO.Float.Input("font_size_percent", default=5.0, min=0.5, max=50.0, step=0.5, tooltip="Font size as a percentage of the image height.", advanced=True),
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#IO.Combo.Input("text_color", options=["white", "black", "red", "green", "blue", "yellow", "cyan", "magenta", "gray"], default="white", tooltip="Color of the text.", advanced=True),
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#IO.Combo.Input("outline_color", options=["auto", "none", "black", "white", "red", "green", "blue", "yellow"], default="auto", tooltip="Color of the text outline.", advanced=True),
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#IO.Float.Input("background_opacity", default=0.0, min=0.0, max=1.0, step=0.05, tooltip="Opacity of the background behind the text (0 = transparent, 1 = solid).", advanced=True),
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],
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outputs=[IO.Image.Output()],
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)
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@classmethod
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def execute(cls, image, text, position="top", align="left", font_size_percent=5.0, text_color="white", outline_color="auto", margin_percent=1.0,
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line_spacing=1.2, background_opacity=0.0, min_font_percent=2.0, outline_thickness_factor=0.04) -> IO.NodeOutput:
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if text.strip() == "":
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return IO.NodeOutput(image)
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text = text.replace("\\n", "\n").replace("\\t", "\t")
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try:
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text_color = ImageColor.getrgb(text_color)[:3]
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except ValueError:
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text_color = (255, 255, 255)
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luminance = 0.299 * text_color[0] + 0.587 * text_color[1] + 0.114 * text_color[2]
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contrast_color = (0, 0, 0) if luminance > 40 else (255, 255, 255)
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choice = outline_color.lower()
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if choice == "none":
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outline_color = None
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elif choice == "auto":
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outline_color = contrast_color
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else:
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outline_color = ImageColor.getrgb(outline_color)[:3]
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background_color = contrast_color if outline_color is None else outline_color
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frames = [cls.render_text_on_frame(frame, text, position, align, font_size_percent, margin_percent, text_color, outline_color, background_color,
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line_spacing, background_opacity, min_font_percent, outline_thickness_factor)
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for frame in image]
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return IO.NodeOutput(torch.stack(frames, dim=0))
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@classmethod
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def render_text_on_frame(cls, frame, text, position="top", align="left", font_size_percent=5.0, margin_percent=1.0, text_color="white", outline_color="auto",
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background_color=None, line_spacing=1.2, background_opacity=0.0, min_font_percent=2.0, outline_thickness_factor=0.04, min_font_px=10):
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pil_image = PILImage.fromarray((frame.clamp(0.0, 1.0).cpu().numpy() * 255.0).astype(np.uint8), mode="RGB")
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width, height = pil_image.width, pil_image.height
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draw = ImageDraw.Draw(pil_image)
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margin = int(round(margin_percent / 100.0 * min(width, height)))
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max_width = max(1, width - 2 * margin)
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max_height = max(1, height - 2 * margin)
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# Font scales with resolution, then shrinks to fit the height.
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size = max(1, int(round(font_size_percent / 100.0 * height)))
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floor = min(size, max(min_font_px, int(round(min_font_percent / 100.0 * height))))
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while True:
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font = ImageFont.load_default(size=size)
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stroke = max(1, int(round(size * outline_thickness_factor))) if outline_color is not None else 0
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block = "\n".join(cls.wrap_text(text, font, max_width))
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# convert line spacing to pixel spacing
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single = draw.textbbox((0, 0), "Ay", font=font, stroke_width=stroke)
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double = draw.multiline_textbbox((0, 0), "Ay\nAy", font=font, spacing=0, stroke_width=stroke)
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natural_advance = (double[3] - double[1]) - (single[3] - single[1])
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pixel_spacing = int(round(size * line_spacing - natural_advance))
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box = draw.multiline_textbbox((0, 0), block, font=font, spacing=pixel_spacing, stroke_width=stroke)
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block_height = box[3] - box[1]
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if block_height <= max_height or size <= floor:
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break
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size = max(floor, int(size * 0.9))
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if background_opacity > 0:
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band = block_height + 2 * margin
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rect = [0, height - band, width, height] if position == "bottom" else [0, 0, width, band]
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overlay = PILImage.new("RGBA", pil_image.size, (0, 0, 0, 0))
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ImageDraw.Draw(overlay).rectangle(rect, fill=(*background_color, int(round(background_opacity * 255))))
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pil_image = PILImage.alpha_composite(pil_image.convert("RGBA"), overlay).convert("RGB")
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draw = ImageDraw.Draw(pil_image)
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anchor_h, x = {"left": ("l", margin), "center": ("m", width / 2), "right": ("r", width - margin)}[align]
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if position == "bottom":
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anchor_v, y = "d", height - margin
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else:
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anchor_v, y = "a", margin
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draw.multiline_text((x, y), block, font=font, fill=text_color, anchor=anchor_h + anchor_v,
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align=align, spacing=pixel_spacing, stroke_width=stroke, stroke_fill=outline_color)
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return torch.from_numpy(np.array(pil_image).astype(np.float32) / 255.0)
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@staticmethod
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def wrap_text(text, font, max_width):
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lines = []
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for raw_line in text.split("\n"):
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words = raw_line.split()
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if not words:
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lines.append("")
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continue
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current = ""
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# Break the line into words and split words that are too long
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for word in words:
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while font.getlength(word) > max_width and len(word) > 1:
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cut = 1
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while cut < len(word) and font.getlength(word[:cut + 1]) <= max_width:
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cut += 1
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if current:
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lines.append(current)
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current = ""
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lines.append(word[:cut])
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word = word[cut:]
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candidate = word if not current else current + " " + word
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if not current or font.getlength(candidate) <= max_width:
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current = candidate
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else:
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lines.append(current)
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current = word
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if current:
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lines.append(current)
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return lines
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class TextOverlayExtension(ComfyExtension):
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@override
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async def get_node_list(self) -> list[type[IO.ComfyNode]]:
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return [TextOverlay]
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async def comfy_entrypoint() -> TextOverlayExtension:
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return TextOverlayExtension()
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