Function process_image_for_overlay

default/methods/action/action_update.py:266–356

In comparison to other methods we want to * Keep PNG transparency session, db session object file, python file pointer??? file_name, string? content_type, string?? blob_base, string, ie "projects/images/" must end with "/" slash extension,

(
        session,
        file,
        file_name,
        content_type,
        blob_base,
        extension)

# Maybe we do...

def process_image_for_overlay(
        session,
        file,
        file_name,
        content_type,
        blob_base,
        extension):
    """

    In comparison to other methods we want to
     * Keep PNG transparency

        session, db session object
        file, python file pointer???
        file_name, string?
        content_type, string??
        blob_base, string, ie "projects/images/" must end with "/" slash
        extension, ?? must include "."?

    """

    new_image = Image(original_filename = file_name)
    session.add(new_image)

    try:
        session.commit()
    except:
        session.rollback()
        raise

    image_blob = blob_base + str(new_image.id)
    image_blob_thumb = image_blob + "_thumb"

    image = imread(file)

    if image is None:
        raise IOError("Could not open")

    new_image.height = image.shape[0]
    new_image.width = image.shape[1]

    if image.shape[0] > 640 or image.shape[1] > 640:
        ratio = min((640 / image.shape[0]),
                    (640 / image.shape[1]))

        shape_x = int(round(image.shape[0] * ratio))
        shape_y = int(round(image.shape[1] * ratio))

        image = imresize(image,
                         (shape_x, shape_y))

    # Save File
    temp = tempfile.mkdtemp()
    new_temp_filename = temp + "/resized" + str(extension)
    imwrite(new_temp_filename, image)
    new_image.height = image.shape[0]
    new_image.width = image.shape[1]