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Variation image generation task

VariationImageGenerationTask

Bases: BaseImageGenerationTask

A task that generates a variation of an image using a prompt. Accepts a text prompt and image as input in one of the following formats: - tuple of (template string, ImageArtifact) - tuple of (TextArtifact, ImageArtifact) - Callable that returns a tuple of (TextArtifact, ImageArtifact)

Attributes:

Name Type Description
image_generation_engine VariationImageGenerationEngine

The engine used to generate the image.
negative_rulesets VariationImageGenerationEngine

List of negatively-weighted rulesets applied to the text prompt, if supported by the driver.
negative_rules VariationImageGenerationEngine

List of negatively-weighted rules applied to the text prompt, if supported by the driver.
output_dir VariationImageGenerationEngine

If provided, the generated image will be written to disk in output_dir.
output_file VariationImageGenerationEngine

If provided, the generated image will be written to disk as output_file.
Source code in griptape/tasks/variation_image_generation_task.py 
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@define
class VariationImageGenerationTask(BaseImageGenerationTask):
    """A task that generates a variation of an image using a prompt. Accepts a text prompt and image as
    input in one of the following formats:
    - tuple of (template string, ImageArtifact)
    - tuple of (TextArtifact, ImageArtifact)
    - Callable that returns a tuple of (TextArtifact, ImageArtifact)

    Attributes:
        image_generation_engine: The engine used to generate the image.
        negative_rulesets: List of negatively-weighted rulesets applied to the text prompt, if supported by the driver.
        negative_rules: List of negatively-weighted rules applied to the text prompt, if supported by the driver.
        output_dir: If provided, the generated image will be written to disk in output_dir.
        output_file: If provided, the generated image will be written to disk as output_file.
    """

    _image_generation_engine: VariationImageGenerationEngine = field(
        default=None, kw_only=True, alias="image_generation_engine"
    )
    _input: tuple[str | TextArtifact, ImageArtifact] | Callable[[BaseTask], ListArtifact] | ListArtifact = field(
        default=None
    )

    @property
    def input(self) -> ListArtifact:
        if isinstance(self._input, ListArtifact):
            return self._input
        elif isinstance(self._input, tuple):
            if isinstance(self._input[0], TextArtifact):
                input_text = self._input[0]
            else:
                input_text = TextArtifact(J2().render_from_string(self._input[0], **self.full_context))

            return ListArtifact([input_text, self._input[1]])
        elif isinstance(self._input, Callable):
            return self._input(self)
        else:
            raise ValueError("Input must be a tuple of (text, image) or a callable that returns such a tuple.")

    @input.setter
    def input(self, value: tuple[str | TextArtifact, ImageArtifact] | Callable[[BaseTask], ListArtifact]) -> None:
        self._input = value

    @property
    def image_generation_engine(self) -> VariationImageGenerationEngine:
        if self._image_generation_engine is None:
            if self.structure is not None:
                self._image_generation_engine = VariationImageGenerationEngine(
                    image_generation_driver=self.structure.config.image_generation_driver
                )
            else:
                raise ValueError("Image Generation Engine is not set.")
        return self._image_generation_engine

    @image_generation_engine.setter
    def image_generation_engine(self, value: VariationImageGenerationEngine) -> None:
        self._image_generation_engine = value

    def run(self) -> ImageArtifact:
        prompt_artifact = self.input[0]

        image_artifact = self.input[1]
        if not isinstance(image_artifact, ImageArtifact):
            raise ValueError("Image must be an ImageArtifact.")

        output_image_artifact = self.image_generation_engine.run(
            prompts=[prompt_artifact.to_text()],
            image=image_artifact,
            rulesets=self.all_rulesets,
            negative_rulesets=self.negative_rulesets,
        )

        if self.output_dir or self.output_file:
            self._write_to_file(output_image_artifact)

        return output_image_artifact

image_generation_engine: VariationImageGenerationEngine property writable

input: ListArtifact property writable

run()

Source code in griptape/tasks/variation_image_generation_task.py 
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def run(self) -> ImageArtifact:
    prompt_artifact = self.input[0]

    image_artifact = self.input[1]
    if not isinstance(image_artifact, ImageArtifact):
        raise ValueError("Image must be an ImageArtifact.")

    output_image_artifact = self.image_generation_engine.run(
        prompts=[prompt_artifact.to_text()],
        image=image_artifact,
        rulesets=self.all_rulesets,
        negative_rulesets=self.negative_rulesets,
    )

    if self.output_dir or self.output_file:
        self._write_to_file(output_image_artifact)

    return output_image_artifact