fit the destination image size to the init image aspect ratio

[lstein]

Users request that the aspect ratio of the init image should constrain the dimensions of the generated image, rather than the other way around. This implements this request in a way that does not increase the overall area (and VRAM requirements) of the generated image.

In addition, there was a bug in how the destination image's dimensions were calculated, and this fixes that.

[cvar66]

I tried your code and still having issues. When I use the webUI with a 512 X 704 image and enter those dimensions in the field it resizes my image to 320 X 512.

loaded input image of size 512x704 from ./img2img-tmp.png
resized input image to size 320x512 (use -H to adjust)

At the command line I get this error

Traceback (most recent call last):
File "scripts/dream.py", line 516, in
main()
File "scripts/dream.py", line 95, in main
main_loop(t2i, opt.outdir, opt.prompt_as_dir, cmd_parser, infile)
File "scripts/dream.py", line 178, in main_loop
normalized_prompt = PromptFormatter(t2i, opt).normalize_prompt()
File "e:\stable-diffusion\ldm\dream\pngwriter.py", line 120, in normalize_prompt
switches.append(f'-b{opt.batch_size or t2i.batch_size}')
AttributeError: 'Namespace' object has no attribute 'batch_size'

[lstein]

@cvar66 You found two bugs. Thank you!
The web server version should be working now. Please test and let me know what you observe. I hope the behavior will be more intuitive now.

[cvar66]

I just updated with git and now I have a new problem. webUi loaded up fine, but as soon as i hit generate I get this error. Will try the new code when this is fixed.

File "e:\stable-diffusion\ldm\dream\server.py", line 91, in do_POST
pngwriter = PngWriter(
TypeError: init() takes from 2 to 3 positional arguments but 4 were given

[bakkot]

webUi loaded up fine, but as soon as i hit generate I get this error

That's caused by 3be1cee having missed this line, and will be fixed by #231. In the mean time, you can delete the , 1 from the linked line and it should work.

[cvar66]

I removed the , 1 and now I get this

File "e:\stable-diffusion\ldm\dream\server.py", line 134, in do_POST
step_writer = PngWriter('./outputs/intermediates/', prompt, 2)
TypeError: init() takes from 2 to 3 positional arguments but 4 were given

[lstein]

This PR does the same thing as @blessedcoolant 's PR #229. I'm testing his version now and will use that in preference to this one because he's added checks for more edge cases.

[lstein]

Abandoned.