[BUG] All images inserted using base64 are forced into 16:9 ratio

[luketpena]

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Issue Category

• Enhancement
• Bug
• Question
• Documentation gap/issue

Product Versions

• Please specify what version of the library you are using......: [ 3.14.0]
• Please specify what version(s) of PowerPoint you are targeting: [2407]
• Please specify what web browser you are using.................: [Chrome]

Desired Behavior

I can add an image via base64 of any image ratio and see that image at the correct ratio in my slide.

Observed Behavior

Sizing methods all work correctly (cover & contain). But it is stretching the image, regardless of original image size, to a ratio of 16:9. This is regardless of addImage size or the size I provide in the sizing options. If I set the sizing type to "cover", it will cover the space, but the image is still clearly warped. (See the image below: the original is 320x400.

This is not the final code we want, but this is what I am testing it with to make sure it isn't the sizing properties causing the issue:
slide.addImage({ data: base64String, x: '5%', w: '50%', y: '10%', h: '50%', sizing: { type: 'contain', w: '50%', h: '50%', }, })

I have double checked the base64 being inserted, and it is accurate to the image I want. We are using an image url in another place, but it is being used in a way that makes it harder to discern the aspect ratio. It appears to be warped as well.

Steps to Reproduce

1. Create a new pptx file
2. Create a new slide
3. Convert an image to base64 string and add to slide using the code above
4. Write the file
5. OBSERVE: the ratio of the image is not preserved, is coerced into 16:9 ratio