sd webui hires fix tweaks

Add additional options and features to hires fix for Stable Diffusion web UI

Features

1. Hires pass CFG scale

   • Set a different CFG scale for hires pass
     this is particularly useful if you're working with LCM, can also a achieve interesting effects

2. Hires Batch and Seed

   • Generate multiple hires pass form first pass image
   • Specify different seed for hires pass

3. Hires prompt mode and Remove First Pass Extra Networks

   • Changes how the hires prompt is created based on the first pass prompt
   1. Default: Webui default behavior:
      if blank same as first pass else use hires prompt
   2. Append: Append hires prompt after first pass prompt
   3. Prepend: Prepend hires prompt before first pass prompt
   4. Prompt S/R: Prompt Search and Replace:
      replace or insert first pass prompt with hires prompt
      
      
   • Remove First Pass Extra Networks: When check will remove extra networks from first pass prompt before creating hires prompt

4. Hires output directory

   • Specify a different output directory for hires pass
   • Settings > Paths for saving > Output directory for hires. fix images

Remove First Pass Extra Networks

• Remove First Pass Extra Networks operates by removing all extra networks in prompt (every thin matching <xxxx:extra-network-name:weight>) in the first pass prompt, this means it only works with LoRA and Hypernetworks and dose not work with Textual Inversion Embeddings or if the extra networks are added by later by other means such as Setting or Styles.
• As it only touches the first pass prompt it will not have an affect if Hires prompt mode is Default and the hires prompt is not blank, as the user input hires prompt will take precedence.
• • The default behavior of the webui is If hires prompt is not specfied (when blank) then use the same first pass prompt for hires pass else use the user input hires prompt. if the first pass prompt is not use the Remove First Pass Extra Networks will not have an affect. Usage case example:

1. You wish the hires prompt to be the same as the first pass prompt but without the extra networks
2. Combining with other Hires prompt mode such as Append to change the extra networks used during hires pass

Note: the Default Hires prompt mode has priority over Remove First Pass Extra Networks, in other words if Default is selected Remove First Pass Extra Networks will be ignored if hires prompt is not blank

Prompt Search and Replace syntax

When in Prompt Search and Replace mode the first pass prompt will be used as the base template to perform a search and replace on to create the hires prompt.

the first pass can be any regular prompt, or you can insert @insert_marker@ anywhere in the prompt to indicate where the hires prompt should be inserted. the @insert_marker@ will be removed from the prompt before image generation.

example first pass prompt

this is an example prompt @insert_marker@, and replace prompt some more replace with blank prompt, 
prompt to
replace can be
multil-ine
like so

the hires prompt is used as instructions for the search and replace each instruction is entry starts with a key_word enclosed by @ at the start of the line, everything after this until the next @key_word@ is the replacement or inserted prompt

Example hires prompt (instructions)

@insert_marker@ insert something here
@replace prompt@ replace something here
@replace with blank@
@can be
multil-ine@replacement can
be multi-line

• @insert_marker@ exists in the prompt it will perform insert mode insert something here will be inserted in its place of @insert_marker@ the @insert_marker@ itself will be removed from the prompt

• @replace prompt@ dose not in the prompt it will perform replace mode, the prompt will be unchanged but the hires prompt will have replace prompt replaced with replace something here

• @replace with blank@ similar to @replace prompt@ but the replacement is "empty", this effectively this removes the replace with blank from the hires prompt

• both search phrase and replacement can be multi-line

if you need a literal @ in the instructions then you can escape it by doubling it @@ you can also change the character used to enclose the key_word by setting the @ to some other character

This is the resulting using the above prompt and hires prompt resulting prompt

this is an example prompt , and replace prompt some more replace with blank prompt,
prompt to
replace can be
multil-ine
like so

Resulting hires prompt

this is an example prompt  insert something here
, and  replace something here
 some more  prompt, 
prompt to
replace replacement can
be multi-line
like so

Notes

• Remove First Pass Extra Networks and Hires prompt mode are performed very early in the image generation pipline, even before Styles is applied to prompts, which means that it will not affect the prompt added by Styles. it should only affect the style you can visibly see in the prompt input box.
• • Features added can be hidden in settings if you do use them
• If you would like to suggest a feature feel free to open an issue or pull request
• I position this extension as "Workflow improvement" tool, in general, this extensions functionality should be possible to do without this extension, even if might require multiple steps
• • Hires pass CFG scale and Hires Batch and Seed can be archived by manually performing img2img on the txt2img output.
• • Hires prompt mode and Remove First Pass Extra Networks can be archived by manually editing the prompt before generating the hires pass.
• • Hires output directory can be archived by manually changing the output directory in the webui settings