feat: add scale parameter to img2img

bot/img2imgCommand.ts

@@ -73,22 +73,10 @@ async function img2img(
   const repliedToText = repliedToMsg?.text || repliedToMsg?.caption;
   if (includeRepliedTo && repliedToText) {
     // TODO: remove bot command from replied to text
-    const originalParams = parsePngInfo(repliedToText);
-    params = {
-      ...originalParams,
-      ...params,
-      prompt: [originalParams.prompt, params.prompt].filter(Boolean).join("\n"),
-      negative_prompt: [originalParams.negative_prompt, params.negative_prompt]
-        .filter(Boolean).join("\n"),
-    };
+    params = parsePngInfo(repliedToText, params);
   }
 
-  const messageParams = parsePngInfo(match ?? "");
-  params = {
-    ...params,
-    ...messageParams,
-    prompt: [params.prompt, messageParams.prompt].filter(Boolean).join("\n"),
-  };
+  params = parsePngInfo(match ?? "", params);
 
   if (!fileId) {
     await ctx.reply(

bot/txt2imgCommand.ts

@@ -50,35 +50,16 @@ async function txt2img(ctx: Context, match: string, includeRepliedTo: boolean):
   if (includeRepliedTo && repliedToMsg?.document?.mime_type === "image/png") {
     const file = await ctx.api.getFile(repliedToMsg.document.file_id);
     const buffer = await fetch(file.getUrl()).then((resp) => resp.arrayBuffer());
-    const fileParams = parsePngInfo(getPngInfo(new Uint8Array(buffer)) ?? "");
-    params = {
-      ...params,
-      ...fileParams,
-      prompt: [params.prompt, fileParams.prompt].filter(Boolean).join("\n"),
-      negative_prompt: [params.negative_prompt, fileParams.negative_prompt]
-        .filter(Boolean).join("\n"),
-    };
+    params = parsePngInfo(getPngInfo(new Uint8Array(buffer)) ?? "", params);
   }
 
   const repliedToText = repliedToMsg?.text || repliedToMsg?.caption;
   if (includeRepliedTo && repliedToText) {
     // TODO: remove bot command from replied to text
-    const originalParams = parsePngInfo(repliedToText);
-    params = {
-      ...originalParams,
-      ...params,
-      prompt: [originalParams.prompt, params.prompt].filter(Boolean).join("\n"),
-      negative_prompt: [originalParams.negative_prompt, params.negative_prompt]
-        .filter(Boolean).join("\n"),
-    };
+    params = parsePngInfo(repliedToText, params);
   }
 
-  const messageParams = parsePngInfo(match);
-  params = {
-    ...params,
-    ...messageParams,
-    prompt: [params.prompt, messageParams.prompt].filter(Boolean).join("\n"),
-  };
+  params = parsePngInfo(match, params);
 
   if (!params.prompt) {
     await ctx.reply(

common/parsePngInfo.ts

@@ -20,10 +20,14 @@ export interface PngInfo {
   denoising_strength: number;
 }
 
-export function parsePngInfo(pngInfo: string): Partial<PngInfo> {
+interface PngInfoExtra extends PngInfo {
+  upscale?: number;
+}
+
+export function parsePngInfo(pngInfo: string, baseParams?: Partial<PngInfo>): Partial<PngInfo> {
   const tags = pngInfo.split(/[,;]+|\.+\s|\n/u);
   let part: "prompt" | "negative_prompt" | "params" = "prompt";
-  const params: Partial<PngInfo> = {};
+  const params: Partial<PngInfoExtra> = {};
   const prompt: string[] = [];
   const negativePrompt: string[] = [];
   for (const tag of tags) {
@@ -72,6 +76,13 @@ export function parsePngInfo(pngInfo: string): Partial<PngInfo> {
           }
           break;
         }
+        case "upscale":
+        case "scale": {
+          part = "params";
+          const upscale = Number(value.trim());
+          if (upscale > 0) params.upscale = Math.min(upscale, 2);
+          break;
+        }
         case "denoisingstrength":
         case "denoising":
         case "denoise": {
@@ -113,5 +124,19 @@ export function parsePngInfo(pngInfo: string): Partial<PngInfo> {
   }
   if (prompt.length > 0) params.prompt = prompt.join(", ");
   if (negativePrompt.length > 0) params.negative_prompt = negativePrompt.join(", ");
-  return params;
+
+  // handle upscale
+  if (params.upscale && baseParams?.width && baseParams?.height) {
+    params.width = baseParams.width * params.upscale;
+    params.height = baseParams.height * params.upscale;
+  }
+
+  return {
+    ...baseParams,
+    ...params,
+    prompt: [baseParams?.prompt, params.prompt]
+      .filter(Boolean).join("\n"),
+    negative_prompt: [baseParams?.negative_prompt, params.negative_prompt]
+      .filter(Boolean).join("\n"),
+  };
 }

tasks/processJobs.ts

@@ -213,7 +213,14 @@ async function processJob(job: IKV.Model<JobSchema>, worker: WorkerData, config:
     case "txt2img":
       response = await sdTxt2Img(
         worker.api,
-        { ...config.defaultParams, ...job.value.task.params, ...size },
+        {
+          ...config.defaultParams,
+          ...job.value.task.params,
+          ...size,
+          negative_prompt: job.value.task.params.negative_prompt
+            ? job.value.task.params.negative_prompt
+            : config.defaultParams?.negative_prompt,
+        },
         handleProgress,
       );
       break;