Problem Description

The task is to programmatically generate a framed image with mitered corners using Python's PIL (Pillow) library. The framed image should consist of a main image (which can optionally be matted) surrounded by a frame with mitered (45-degree angle) corners. The frame can have a texture or pattern, which needs to be seamless across the edges and corners.

Acceptance Criteria

Frame Generation: The software should be able to generate horizontal and vertical frame strips and mitered corner pieces from a given texture or color.
Corner Assembly: The corners should be mitered at a 45-degree angle, seamlessly joining the horizontal and vertical frame strips.
Image Framing: The main image should be correctly positioned within the frame, with optional matting around it. The frame (with mitered corners) should be accurately aligned around this image.
Scalability: The frame should adjust to accommodate images of various sizes while maintaining the aspect ratio and frame width.
Output: The final output should be a single image file that combines the main image, mat (if applicable), frame strips, and mitered corners.

Technical Details

Image Manipulation Library: Use Python's PIL (Pillow) library for image loading, manipulation, and saving.
Frame Strips: Create horizontal and vertical strips for the frame. If a pattern is used, it should tile seamlessly.
Mitered Corners: Implement a function to create a mitered corner by joining the frame strips at 45 degrees. This function should handle the texture alignment at the corners.
Image and Frame Assembly: Develop a process to assemble the matted image (if matting is applied) and frame components (strips and corners) into a final composition. Ensure that all elements are correctly aligned and sized.
Image Handling: Include functionality to handle different image sizes and aspect ratios, adjusting the frame size accordingly.
Error Handling: Implement error handling for scenarios such as image loading failures or incorrect image dimensions.
Supported Frames: support the frame types White, Black, Walnut (dark wood), Maple (light wood)
Supported Sizes: support arbitrary sizes for the frame, artwork size, and matte size
Notes: Frame width is uniform on all size.
Mat is always a solid color, from a provided RGB triple.

Link to Project

See examples at https://docs.google.com/document/d/1rKjYAD80bzY4iS6k1vvOtnwD1quyjjLJmetsO1tyrI4/edit