api/core/controllers/text2image.py

from diffusers import DiffusionPipeline as Pipe
import torch

class Converter:
    import io
    from PIL import Image

    img = Image.open(fh, mode='r')
    roi_img = img.crop(box)

    img_byte_arr = io.BytesIO()
    roi_img.save(img_byte_arr, format='PNG')
    img_byte_arr = img_byte_arr.getvalue()

class Generador:
    def img_to_bytes(image) -> bytes:
        import io
        _imgByteArr = io.BytesIO()
        image.save(_imgByteArr, format=image.format)
        return _imgByteArr.getvalue()
    def using_runway_sd_15(prompt:str)->bytes|None:
        try:            
            _generador = Pipe.from_pretrained("runwayml/stable-diffusion-v1-5", torch_dtype=torch.float16)
            _generador.to("cuda")
            _imagen = _generador(prompt).images[0]
            _response = Generador.img_to_bytes(img=_imagen)
        except Exception as e:
            _response = None
        finally:
            return _response
    def using_stability_sd_21(prompt:str)->bytes|None:
        try:
            _generador = Pipe.from_pretrained("stabilityai/stable-diffusion-2-1", torch_dtype=torch.float16)
            _generador.to("cuda")
            _imagen = _generador(prompt).images[0]
            _response = Generador.img_to_bytes(img=_imagen)
        except Exception as e:
            _response = None
        finally:
            return _response
    def using_realistic_v14(prompt:str)->bytes|None:
        try:
            _generador = Pipe.from_pretrained("SG161222/Realistic_Vision_V1.4", torch_dtype=torch.float16)
            _generador.to("cuda")
            _imagen = _generador(prompt).images[0]
            _response = Generador.img_to_bytes(img=_imagen)
        except Exception as e:
            _response = None
        finally:
            return _response
    def using_prompthero_openjourney(prompt:str)->bytes|None:
        try:
            _generador = Pipe.from_pretrained("prompthero/openjourney", torch_dtype=torch.float16)
            _generador.to("cuda")
            _imagen = _generador(prompt).images[0]
            _response = Generador.img_to_bytes(img=_imagen)
        except Exception as e:
            _response = None
        finally:
            return _response