src/core/image.js

@@ -112,22 +112,11 @@ class PDFImage {
           bitsPerComponent: image.bitsPerComponent,
         } = JpxImage.parseImageProperties(image.stream));
         image.stream.reset();
-        const reducePower = ImageResizer.getReducePowerForJPX(
-          image.width,
-          image.height,
-          image.numComps
-        );
         this.jpxDecoderOptions = {
           numComponents: 0,
           isIndexedColormap: false,
           smaskInData: dict.has("SMaskInData"),
-          reducePower,
         };
-        if (reducePower) {
-          const factor = 2 ** reducePower;
-          image.width = Math.ceil(image.width / factor);
-          image.height = Math.ceil(image.height / factor);
-        }
         break;
       case "JBIG2Decode":
         image.bitsPerComponent = 1;

src/core/image_resizer.js

@@ -96,30 +96,6 @@ class ImageResizer {
     return area > maxArea;
   }
 
-  static getReducePowerForJPX(width, height, componentsCount) {
-    const area = width * height;
-    // The maximum memory we've in the wasm runtime is 2GB.
-    // Each component is 4 bytes and we can't allocate all the memory just for
-    // the buffers so we limit the size to 1GB / (componentsCount * 4).
-    // We could use more than 2GB by setting MAXIMUM_MEMORY but it would take
-    // too much time to decode a big image.
-    const maxJPXArea = 2 ** 30 / (componentsCount * 4);
-    if (!this.needsToBeResized(width, height)) {
-      if (area > maxJPXArea) {
-        // The image is too large, we need to rescale it.
-        return Math.ceil(Math.log2(area / maxJPXArea));
-      }
-      return 0;
-    }
-    const { MAX_DIM, MAX_AREA } = this;
-    const minFactor = Math.max(
-      width / MAX_DIM,
-      height / MAX_DIM,
-      Math.sqrt(area / Math.min(maxJPXArea, MAX_AREA))
-    );
-    return Math.ceil(Math.log2(minFactor));
-  }
-
   static get MAX_DIM() {
     return shadow(
       this,

src/core/jpx.js

@@ -92,12 +92,7 @@ class JpxImage {
 
   static async decode(
     bytes,
-    {
-      numComponents = 4,
-      isIndexedColormap = false,
-      smaskInData = false,
-      reducePower = 0,
-    } = {}
+    { numComponents = 4, isIndexedColormap = false, smaskInData = false } = {}
   ) {
     if (!this.#modulePromise) {
       const { promise, resolve } = Promise.withResolvers();
@@ -124,14 +119,13 @@ class JpxImage {
     try {
       const size = bytes.length;
       ptr = module._malloc(size);
-      module.writeArrayToMemory(bytes, ptr);
+      module.HEAPU8.set(bytes, ptr);
       const ret = module._jp2_decode(
         ptr,
         size,
         numComponents > 0 ? numComponents : 0,
         !!isIndexedColormap,
-        !!smaskInData,
-        reducePower
+        !!smaskInData
       );
       if (ret) {
         const { errorMessages } = module;

test/pdfs/.gitignore

@@ -724,4 +724,3 @@
 !issue16742.pdf
 !chrome-text-selection-markedContent.pdf
 !bug1963407.pdf
-!issue19517.pdf

test/test_manifest.json

@@ -12107,12 +12107,5 @@
         "value": "Hello World"
       }
     }
-  },
-  {
-    "id": "issue19517",
-    "file": "pdfs/issue19517.pdf",
-    "md5": "2abe67c8b34522feb6b85d252dde9d3e",
-    "rounds": 1,
-    "type": "eq"
   }
 ]