def resize_gif(im: GifImageFile, size: int = DEFAULT_EMOJI_SIZE) -> bytes:
frames = []
duration_info = []
disposals = []
# If 'loop' info is not set then loop for infinite number of times.
loop = im.info.get("loop", 0)
for frame_num in range(0, im.n_frames):
im.seek(frame_num)
new_frame = im.copy()
new_frame.paste(im, (0, 0), im.convert("RGBA"))
new_frame = ImageOps.pad(new_frame, (size, size), Image.ANTIALIAS)
frames.append(new_frame)
duration_info.append(im.info["duration"])
disposals.append(im.disposal_method)
out = io.BytesIO()
frames[0].save(
out,
save_all=True,
optimize=False,
format="GIF",
append_images=frames[1:],
duration=duration_info,
disposal=disposals,
loop=loop,
)
return out.getvalue()
def convert_frame_to_transparent(imageObject: GifImageFile) -> Image:
"""
https://stackoverflow.com/questions/3752476/python-pil-replace-a-single-rgba-color
replaces #FFFFFF (white) with #00000000 (clear)
"""
rgbaImage: Image = imageObject.convert('RGBA')
data = np.array(rgbaImage) # "data" is a height x width x 4 numpy array
red, green, blue, alpha = data.T # Temporarily unpack the bands for readability
# Replace white with clear... (leaves alpha values alone...)
white_areas = (red == 255) & (blue == 255) & (green == 255)
data[...][white_areas.T] = (0, 0, 0, 0) # Transpose back needed
return Image.fromarray(data)
def resize_gif(im: GifImageFile, size: int=DEFAULT_EMOJI_SIZE) -> bytes:
frames = []
duration_info = []
# If 'loop' info is not set then loop for infinite number of times.
loop = im.info.get("loop", 0)
for frame_num in range(0, im.n_frames):
im.seek(frame_num)
new_frame = Image.new("RGBA", im.size)
new_frame.paste(im, (0, 0), im.convert("RGBA"))
new_frame = ImageOps.fit(new_frame, (size, size), Image.ANTIALIAS)
frames.append(new_frame)
duration_info.append(im.info['duration'])
out = io.BytesIO()
frames[0].save(out, save_all=True, optimize=True,
format="GIF", append_images=frames[1:],
duration=duration_info,
loop=loop)
return out.getvalue()
