Ensure SVG scale-on-load optimisation uses newly exposed params (#4415)

Follow-up to commit c4b1d80.

docs/src/content/docs/api-constructor.md

@@ -44,10 +44,6 @@ where the overall height is the `pageHeight` multiplied by the number of `pages`
 | [options.ignoreIcc] | <code>number</code> | <code>false</code> | should the embedded ICC profile, if any, be ignored. |
 | [options.pages] | <code>number</code> | <code>1</code> | Number of pages to extract for multi-page input (GIF, WebP, TIFF), use -1 for all pages. |
 | [options.page] | <code>number</code> | <code>0</code> | Page number to start extracting from for multi-page input (GIF, WebP, TIFF), zero based. |
-| [options.subifd] | <code>number</code> | <code>-1</code> | subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image. |
-| [options.level] | <code>number</code> | <code>0</code> | level to extract from a multi-level input (OpenSlide), zero based. |
-| [options.pdfBackground] | <code>string</code> \| <code>Object</code> |  | Background colour to use when PDF is partially transparent. Parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick. |
-| [options.jp2Oneshot] | <code>boolean</code> | <code>false</code> | Set to `true` to decode tiled JPEG 2000 images in a single operation, improving compatibility. |
 | [options.animated] | <code>boolean</code> | <code>false</code> | Set to `true` to read all frames/pages of an animated image (GIF, WebP, TIFF), equivalent of setting `pages` to `-1`. |
 | [options.raw] | <code>Object</code> |  | describes raw pixel input image data. See `raw()` for pixel ordering. |
 | [options.raw.width] | <code>number</code> |  | integral number of pixels wide. |
@@ -82,6 +78,17 @@ where the overall height is the `pageHeight` multiplied by the number of `pages`
 | [options.join.background] | <code>string</code> \| <code>Object</code> |  | parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
 | [options.join.halign] | <code>string</code> | <code>&quot;&#x27;left&#x27;&quot;</code> | horizontal alignment style for images joined horizontally (`'left'`, `'centre'`, `'center'`, `'right'`). |
 | [options.join.valign] | <code>string</code> | <code>&quot;&#x27;top&#x27;&quot;</code> | vertical alignment style for images joined vertically (`'top'`, `'centre'`, `'center'`, `'bottom'`). |
+| [options.tiff] | <code>Object</code> |  | Describes TIFF specific options. |
+| [options.tiff.subifd] | <code>number</code> | <code>-1</code> | Sub Image File Directory to extract for OME-TIFF, defaults to main image. |
+| [options.svg] | <code>Object</code> |  | Describes SVG specific options. |
+| [options.svg.stylesheet] | <code>string</code> |  | Custom CSS for SVG input, applied with a User Origin during the CSS cascade. |
+| [options.svg.highBitdepth] | <code>boolean</code> | <code>false</code> | Set to `true` to render SVG input at 32-bits per channel (128-bit) instead of 8-bits per channel (32-bit) RGBA. |
+| [options.pdf] | <code>Object</code> |  | Describes PDF specific options. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick. |
+| [options.pdf.background] | <code>string</code> \| <code>Object</code> |  | Background colour to use when PDF is partially transparent. Parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
+| [options.openSlide] | <code>Object</code> |  | Describes OpenSlide specific options. Requires the use of a globally-installed libvips compiled with support for OpenSlide. |
+| [options.openSlide.level] | <code>number</code> | <code>0</code> | Level to extract from a multi-level input, zero based. |
+| [options.jp2] | <code>Object</code> |  | Describes JPEG 2000 specific options. Requires the use of a globally-installed libvips compiled with support for OpenJPEG. |
+| [options.jp2.oneshot] | <code>boolean</code> | <code>false</code> | Set to `true` to decode tiled JPEG 2000 images in a single operation, improving compatibility. |
 
 **Example**  
 ```js

docs/src/content/docs/api-utility.md

@@ -113,15 +113,9 @@ Some image format libraries spawn additional threads,
 e.g. libaom manages its own 4 threads when encoding AVIF images,
 and these are independent of the value set here.
 
-The maximum number of images that sharp can process in parallel
+:::note
-is controlled by libuv's `UV_THREADPOOL_SIZE` environment variable,
+Further [control over performance](/performance) is available.
-which defaults to 4.
+:::
-
-https://nodejs.org/api/cli.html#uv_threadpool_sizesize
-
-For example, by default, a machine with 8 CPU cores will process
-4 images in parallel and use up to 8 threads per image,
-so there will be up to 32 concurrent threads.
 
 
 **Returns**: <code>number</code> - concurrency  

docs/src/content/docs/changelog.md

@@ -12,6 +12,10 @@ Requires libvips v8.17.0
 
 * Add "Magic Kernel Sharp" (no relation) to resizing kernels.
 
+* Deprecate top-level, format-specific constructor parameters, e.g. `subifd` becomes `tiff.subifd`.
+
+* Expose `stylesheet` and `highBitdepth` SVG input parameters.
+
 * Expose `keepDuplicateFrames` GIF output parameter.
 
 * Expose JPEG 2000 `oneshot` decoder option.

docs/src/content/docs/performance.md

@@ -2,6 +2,38 @@
 title: Performance
 ---
 
+## Parallelism and concurrency
+
+Node.js uses a libuv-managed thread pool when processing asynchronous calls to native modules such as sharp.
+
+The maximum number of images that sharp can process in parallel is controlled by libuv's
+[`UV_THREADPOOL_SIZE`](https://nodejs.org/api/cli.html#uv_threadpool_sizesize)
+environment variable, which defaults to 4.
+
+When using more than 4 physical CPU cores, set this environment variable
+before the Node.js process starts to increase the thread pool size.
+
+```sh
+export UV_THREADPOOL_SIZE="$(lscpu -p | egrep -v "^#" | sort -u -t, -k 2,4 | wc -l)"
+```
+
+libvips uses a glib-managed thread pool to avoid the overhead of spawning new threads.
+
+The default number of threads used to concurrently process each image is the same as the number of CPU cores,
+except when using glibc-based Linux without jemalloc, where the default is `1` to help reduce memory fragmentation.
+
+Use [`sharp.concurrency()`](/api-utility/#concurrency) to manage the number of threads per image.
+
+To reduce memory fragmentation when using the default Linux glibc memory allocator, set the
+[`MALLOC_ARENA_MAX`](https://www.gnu.org/software/libc/manual/html_node/Memory-Allocation-Tunables.html)
+environment variable before the Node.js process starts to reduce the number of memory pools.
+
+```sh
+export MALLOC_ARENA_MAX="2"
+```
+
+## Benchmark
+
 A test to benchmark the performance of this module relative to alternatives.
 
 Greater libvips performance can be expected with caching enabled (default)
@@ -9,28 +41,28 @@ and using 8+ core machines, especially those with larger L1/L2 CPU caches.
 
 The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
 
-## Contenders
+### Contenders
 
 * [jimp](https://www.npmjs.com/package/jimp) v1.6.0 - Image processing in pure JavaScript.
 * [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
 * [gm](https://www.npmjs.com/package/gm) v1.25.1 - Fully featured wrapper around GraphicsMagick's `gm` command line utility, but "*has been sunset*".
 * sharp v0.34.0 / libvips v8.16.1 - Caching within libvips disabled to ensure a fair comparison.
 
-## Environment
+### Environment
 
-### AMD64
+#### AMD64
 
 * AWS EC2 us-west-2 [c7a.xlarge](https://aws.amazon.com/ec2/instance-types/c7a/) (4x AMD EPYC 9R14)
 * Ubuntu 24.10 [fad5ba7223f8](https://hub.docker.com/layers/library/ubuntu/24.10/images/sha256-fad5ba7223f8d87179dfa23211d31845d47e07a474ac31ad5258afb606523c0d)
 * Node.js 22.14.0
 
-### ARM64
+#### ARM64
 
 * AWS EC2 us-west-2 [c8g.xlarge](https://aws.amazon.com/ec2/instance-types/c8g/) (4x ARM Graviton4)
 * Ubuntu 24.10 [133f2e05cb69](https://hub.docker.com/layers/library/ubuntu/24.10/images/sha256-133f2e05cb6958c3ce7ec870fd5a864558ba780fb7062315b51a23670bff7e76)
 * Node.js 22.14.0
 
-## Task: JPEG
+### Task: JPEG
 
 Decompress a 2725x2225 JPEG image,
 resize to 720x588 using Lanczos 3 resampling (where available),
@@ -62,7 +94,7 @@ Note: jimp does not support Lanczos 3, bicubic resampling used instead.
 | sharp              | file   | file   |   48.42 |     22.7 |
 | sharp              | buffer | buffer |   50.16 |     23.6 |
 
-## Task: PNG
+### Task: PNG
 
 Decompress a 2048x1536 RGBA PNG image,
 premultiply the alpha channel,
@@ -72,7 +104,7 @@ and without adaptive filtering.
 
 Note: jimp does not support premultiply/unpremultiply.
 
-### Results: PNG (AMD64)
+#### Results: PNG (AMD64)
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |
@@ -82,7 +114,7 @@ Note: jimp does not support premultiply/unpremultiply.
 | sharp              | file   | file   |   27.93 |      3.2 |
 | sharp              | buffer | buffer |   28.69 |      3.3 |
 
-### Results: PNG (ARM64)
+#### Results: PNG (ARM64)
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |

lib/constructor.js

@@ -153,10 +153,6 @@ const debuglog = util.debuglog('sharp');
  * @param {number} [options.ignoreIcc=false] - should the embedded ICC profile, if any, be ignored.
  * @param {number} [options.pages=1] - Number of pages to extract for multi-page input (GIF, WebP, TIFF), use -1 for all pages.
  * @param {number} [options.page=0] - Page number to start extracting from for multi-page input (GIF, WebP, TIFF), zero based.
- * @param {number} [options.subifd=-1] - subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image.
- * @param {number} [options.level=0] - level to extract from a multi-level input (OpenSlide), zero based.
- * @param {string|Object} [options.pdfBackground] - Background colour to use when PDF is partially transparent. Parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick.
- * @param {boolean} [options.jp2Oneshot=false] - Set to `true` to decode tiled JPEG 2000 images in a single operation, improving compatibility.
  * @param {boolean} [options.animated=false] - Set to `true` to read all frames/pages of an animated image (GIF, WebP, TIFF), equivalent of setting `pages` to `-1`.
  * @param {Object} [options.raw] - describes raw pixel input image data. See `raw()` for pixel ordering.
  * @param {number} [options.raw.width] - integral number of pixels wide.
@@ -192,7 +188,17 @@ const debuglog = util.debuglog('sharp');
  * @param {string|Object} [options.join.background] - parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
  * @param {string} [options.join.halign='left'] - horizontal alignment style for images joined horizontally (`'left'`, `'centre'`, `'center'`, `'right'`).
  * @param {string} [options.join.valign='top'] - vertical alignment style for images joined vertically (`'top'`, `'centre'`, `'center'`, `'bottom'`).
- *
+ * @param {Object} [options.tiff] - Describes TIFF specific options.
+ * @param {number} [options.tiff.subifd=-1] - Sub Image File Directory to extract for OME-TIFF, defaults to main image.
+ * @param {Object} [options.svg] - Describes SVG specific options.
+ * @param {string} [options.svg.stylesheet] - Custom CSS for SVG input, applied with a User Origin during the CSS cascade.
+ * @param {boolean} [options.svg.highBitdepth=false] - Set to `true` to render SVG input at 32-bits per channel (128-bit) instead of 8-bits per channel (32-bit) RGBA.
+ * @param {Object} [options.pdf] - Describes PDF specific options. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick.
+ * @param {string|Object} [options.pdf.background] - Background colour to use when PDF is partially transparent. Parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
+ * @param {Object} [options.openSlide] - Describes OpenSlide specific options. Requires the use of a globally-installed libvips compiled with support for OpenSlide.
+ * @param {number} [options.openSlide.level=0] - Level to extract from a multi-level input, zero based.
+ * @param {Object} [options.jp2] - Describes JPEG 2000 specific options. Requires the use of a globally-installed libvips compiled with support for OpenJPEG.
+ * @param {boolean} [options.jp2.oneshot=false] - Set to `true` to decode tiled JPEG 2000 images in a single operation, improving compatibility.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */

lib/index.d.ts

@@ -1003,14 +1003,22 @@ declare namespace sharp {
         pages?: number | undefined;
         /** Page number to start extracting from for multi-page input (GIF, TIFF, PDF), zero based. (optional, default 0) */
         page?: number | undefined;
-        /** subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image. (optional, default -1) */
+        /** TIFF specific input options */
+        tiff?: TiffInputOptions | undefined;
+        /** SVG specific input options */
+        svg?: SvgInputOptions | undefined;
+        /** PDF specific input options */
+        pdf?: PdfInputOptions | undefined;
+        /** OpenSlide specific input options */
+        openSlide?: OpenSlideInputOptions | undefined;
+        /** JPEG 2000 specific input options */
+        jp2?: Jp2InputOptions | undefined;
+        /** Deprecated: use tiff.subifd instead */
         subifd?: number | undefined;
-        /** Level to extract from a multi-level input (OpenSlide), zero based. (optional, default 0) */
+        /** Deprecated: use pdf.background instead */
-        level?: number | undefined;
-        /** Background colour to use when PDF is partially transparent. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick. */
         pdfBackground?: Colour | Color | undefined;
-        /** Set to `true` to load JPEG 2000 images using [oneshot mode](https://github.com/libvips/libvips/issues/4205) */
+        /** Deprecated: use openSlide.level instead */
-        jp2Oneshot?: boolean | undefined;
+        level?: number | undefined;
         /** Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`). (optional, default false) */
         animated?: boolean | undefined;
         /** Describes raw pixel input image data. See raw() for pixel ordering. */
@@ -1116,6 +1124,33 @@ declare namespace sharp {
         valign?: VerticalAlignment | undefined;
     }
 
+    interface TiffInputOptions {
+        /** Sub Image File Directory to extract, defaults to main image. Use -1 for all subifds. */
+        subifd?: number | undefined;
+    }
+
+    interface SvgInputOptions {
+        /** Custom CSS for SVG input, applied with a User Origin during the CSS cascade. */
+        stylesheet?: string | undefined;
+        /** Set to `true` to render SVG input at 32-bits per channel (128-bit) instead of 8-bits per channel (32-bit) RGBA. */
+        highBitdepth?: boolean | undefined;
+    }
+
+    interface PdfInputOptions {
+        /** Background colour to use when PDF is partially transparent. Requires the use of a globally-installed libvips compiled with support for PDFium, Poppler, ImageMagick or GraphicsMagick. */
+        background?: Colour | Color | undefined;
+    }
+
+    interface OpenSlideInputOptions {
+        /** Level to extract from a multi-level input, zero based. (optional, default 0) */
+        level?: number | undefined;
+    }
+
+    interface Jp2InputOptions {
+        /** Set to `true` to load JPEG 2000 images using [oneshot mode](https://github.com/libvips/libvips/issues/4205) */
+        oneshot?: boolean | undefined;
+    }
+
     interface ExifDir {
         [k: string]: string;
     }

lib/input.js

@@ -22,14 +22,27 @@ const align = {
   high: 'high'
 };
 
+const inputStreamParameters = [
+  // Limits and error handling
+  'failOn', 'limitInputPixels', 'unlimited',
+  // Format-generic
+  'animated', 'autoOrient', 'density', 'ignoreIcc', 'page', 'pages', 'sequentialRead',
+  // Format-specific
+  'jp2', 'openSlide', 'pdf', 'raw', 'svg', 'tiff',
+  // Deprecated
+  'failOnError', 'level', 'pdfBackground', 'subifd'
+];
+
 /**
  * Extract input options, if any, from an object.
  * @private
  */
 function _inputOptionsFromObject (obj) {
-  const { raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd, pdfBackground, autoOrient, jp2Oneshot } = obj;
+  const params = inputStreamParameters
-  return [raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd, pdfBackground, autoOrient, jp2Oneshot].some(is.defined)
+    .filter(p => is.defined(obj[p]))
-    ? { raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd, pdfBackground, autoOrient, jp2Oneshot }
+    .map(p => ([p, obj[p]]));
+  return params.length
+    ? Object.fromEntries(params)
     : undefined;
 }
 
@@ -230,32 +243,66 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         throw is.invalidParameterError('page', 'integer between 0 and 100000', inputOptions.page);
       }
     }
-    // Multi-level input (OpenSlide)
+    // OpenSlide specific options
-    if (is.defined(inputOptions.level)) {
+    if (is.object(inputOptions.openSlide) && is.defined(inputOptions.openSlide.level)) {
+      if (is.integer(inputOptions.openSlide.level) && is.inRange(inputOptions.openSlide.level, 0, 256)) {
+        inputDescriptor.level = inputOptions.openSlide.level;
+      } else {
+        throw is.invalidParameterError('openSlide.level', 'integer between 0 and 256', inputOptions.openSlide.level);
+      }
+    } else if (is.defined(inputOptions.level)) {
+      // Deprecated
       if (is.integer(inputOptions.level) && is.inRange(inputOptions.level, 0, 256)) {
         inputDescriptor.level = inputOptions.level;
       } else {
         throw is.invalidParameterError('level', 'integer between 0 and 256', inputOptions.level);
       }
     }
-    // Sub Image File Directory (TIFF)
+    // TIFF specific options
-    if (is.defined(inputOptions.subifd)) {
+    if (is.object(inputOptions.tiff) && is.defined(inputOptions.tiff.subifd)) {
+      if (is.integer(inputOptions.tiff.subifd) && is.inRange(inputOptions.tiff.subifd, -1, 100000)) {
+        inputDescriptor.subifd = inputOptions.tiff.subifd;
+      } else {
+        throw is.invalidParameterError('tiff.subifd', 'integer between -1 and 100000', inputOptions.tiff.subifd);
+      }
+    } else if (is.defined(inputOptions.subifd)) {
+      // Deprecated
       if (is.integer(inputOptions.subifd) && is.inRange(inputOptions.subifd, -1, 100000)) {
         inputDescriptor.subifd = inputOptions.subifd;
       } else {
         throw is.invalidParameterError('subifd', 'integer between -1 and 100000', inputOptions.subifd);
       }
     }
-    // PDF background colour
+    // SVG specific options
-    if (is.defined(inputOptions.pdfBackground)) {
+    if (is.object(inputOptions.svg)) {
+      if (is.defined(inputOptions.svg.stylesheet)) {
+        if (is.string(inputOptions.svg.stylesheet)) {
+          inputDescriptor.svgStylesheet = inputOptions.svg.stylesheet;
+        } else {
+          throw is.invalidParameterError('svg.stylesheet', 'string', inputOptions.svg.stylesheet);
+        }
+      }
+      if (is.defined(inputOptions.svg.highBitdepth)) {
+        if (is.bool(inputOptions.svg.highBitdepth)) {
+          inputDescriptor.svgHighBitdepth = inputOptions.svg.highBitdepth;
+        } else {
+          throw is.invalidParameterError('svg.highBitdepth', 'boolean', inputOptions.svg.highBitdepth);
+        }
+      }
+    }
+    // PDF specific options
+    if (is.object(inputOptions.pdf) && is.defined(inputOptions.pdf.background)) {
+      inputDescriptor.pdfBackground = this._getBackgroundColourOption(inputOptions.pdf.background);
+    } else if (is.defined(inputOptions.pdfBackground)) {
+      // Deprecated
       inputDescriptor.pdfBackground = this._getBackgroundColourOption(inputOptions.pdfBackground);
     }
-    // JP2 oneshot
+    // JPEG 2000 specific options
-    if (is.defined(inputOptions.jp2Oneshot)) {
+    if (is.object(inputOptions.jp2) && is.defined(inputOptions.jp2.oneshot)) {
-      if (is.bool(inputOptions.jp2Oneshot)) {
+      if (is.bool(inputOptions.jp2.oneshot)) {
-        inputDescriptor.jp2Oneshot = inputOptions.jp2Oneshot;
+        inputDescriptor.jp2Oneshot = inputOptions.jp2.oneshot;
       } else {
-        throw is.invalidParameterError('jp2Oneshot', 'boolean', inputOptions.jp2Oneshot);
+        throw is.invalidParameterError('jp2.oneshot', 'boolean', inputOptions.jp2.oneshot);
       }
     }
     // Create new image

lib/utility.js

@@ -135,15 +135,9 @@ cache(true);
  * e.g. libaom manages its own 4 threads when encoding AVIF images,
  * and these are independent of the value set here.
  *
- * The maximum number of images that sharp can process in parallel
+ * :::note
- * is controlled by libuv's `UV_THREADPOOL_SIZE` environment variable,
+ * Further {@link /performance|control over performance} is available.
- * which defaults to 4.
+ * :::
- *
- * https://nodejs.org/api/cli.html#uv_threadpool_sizesize
- *
- * For example, by default, a machine with 8 CPU cores will process
- * 4 images in parallel and use up to 8 threads per image,
- * so there will be up to 32 concurrent threads.
  *
  * @example
  * const threads = sharp.concurrency(); // 4

src/common.cc

@@ -101,6 +101,13 @@ namespace sharp {
     if (HasAttr(input, "page")) {
       descriptor->page = AttrAsUint32(input, "page");
     }
+    // SVG
+    if (HasAttr(input, "svgStylesheet")) {
+      descriptor->svgStylesheet = AttrAsStr(input, "svgStylesheet");
+    }
+    if (HasAttr(input, "svgHighBitdepth")) {
+      descriptor->svgHighBitdepth = AttrAsBool(input, "svgHighBitdepth");
+    }
     // Multi-level input (OpenSlide)
     if (HasAttr(input, "level")) {
       descriptor->level = AttrAsUint32(input, "level");
@@ -429,6 +436,10 @@ namespace sharp {
               option->set("n", descriptor->pages);
               option->set("page", descriptor->page);
             }
+            if (imageType == ImageType::SVG) {
+              option->set("stylesheet", descriptor->svgStylesheet.data());
+              option->set("high_bitdepth", descriptor->svgHighBitdepth);
+            }
             if (imageType == ImageType::OPENSLIDE) {
               option->set("level", descriptor->level);
             }

src/common.h

@@ -77,6 +77,8 @@ namespace sharp {
     std::vector<double> joinBackground;
     VipsAlign joinHalign;
     VipsAlign joinValign;
+    std::string svgStylesheet;
+    bool svgHighBitdepth;
     std::vector<double> pdfBackground;
     bool jp2Oneshot;
 
@@ -121,6 +123,7 @@ namespace sharp {
       joinBackground{ 0.0, 0.0, 0.0, 255.0 },
       joinHalign(VIPS_ALIGN_LOW),
       joinValign(VIPS_ALIGN_LOW),
+      svgHighBitdepth(false),
       pdfBackground{ 255.0, 255.0, 255.0, 255.0 },
       jp2Oneshot(false) {}
   };

src/pipeline.cc

@@ -276,6 +276,8 @@ class PipelineWorker : public Napi::AsyncWorker {
         } else if (inputImageType == sharp::ImageType::SVG) {
           option->set("unlimited", baton->input->unlimited);
           option->set("dpi", baton->input->density);
+          option->set("stylesheet", baton->input->svgStylesheet.data());
+          option->set("high_bitdepth", baton->input->svgHighBitdepth);
 
           if (baton->input->buffer != nullptr) {
             // Reload SVG buffer

test/types/sharp.test-d.ts

@@ -435,9 +435,6 @@ sharp('input.jpg').clahe({ width: 10, height: 10, maxSlope: 5 }).toFile('outfile
 // Support `unlimited` input option
 sharp('input.png', { unlimited: true }).resize(320, 240).toFile('outfile.png');
 
-// Support `subifd` input option for tiffs
-sharp('input.tiff', { subifd: 3 }).resize(320, 240).toFile('outfile.png');
-
 // Support creating with noise
 sharp({
   create: {
@@ -720,13 +717,22 @@ sharp(input).composite([
   }
 ])
 
+// Support format-specific input options
 const colour: sharp.Colour = '#fff';
 const color: sharp.Color = '#fff';
-sharp({ pdfBackground: colour });
+sharp({ pdf: { background: colour } });
-sharp({ pdfBackground: color });
+sharp({ pdf: { background: color } });
-
+sharp({ pdfBackground: colour }); // Deprecated
-sharp({ jp2Oneshot: true });
+sharp({ pdfBackground: color }); // Deprecated
-sharp({ jp2Oneshot: false });
+sharp({ tiff: { subifd: 3 } });
+sharp({ subifd: 3 }); // Deprecated
+sharp({ openSlide: { level: 0 } });
+sharp({ level: 0 }); // Deprecated
+sharp({ jp2: { oneshot: true } });
+sharp({ jp2: { oneshot: false } });
+sharp({ svg: { stylesheet: 'test' }});
+sharp({ svg: { highBitdepth: true }});
+sharp({ svg: { highBitdepth: false }});
 
 sharp({ autoOrient: true });
 sharp({ autoOrient: false });

test/unit/io.js

@@ -867,52 +867,91 @@ describe('Input/output', function () {
         sharp({ pages: '1' });
       }, /Expected integer between -1 and 100000 for pages but received 1 of type string/);
     });
-    it('Valid level property', function () {
+    it('Valid openSlide.level property', function () {
+      sharp({ openSlide: { level: 1 } });
       sharp({ level: 1 });
     });
-    it('Invalid level property (string) throws', function () {
+    it('Invalid openSlide.level property (string) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ level: '1' });
+        () => sharp({ openSlide: { level: '1' } }),
-      }, /Expected integer between 0 and 256 for level but received 1 of type string/);
+        /Expected integer between 0 and 256 for openSlide.level but received 1 of type string/
+      );
+      assert.throws(
+        () => sharp({ level: '1' }),
+        /Expected integer between 0 and 256 for level but received 1 of type string/
+      );
     });
-    it('Invalid level property (negative) throws', function () {
+    it('Invalid openSlide.level property (negative) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ level: -1 });
+        () => sharp({ openSlide: { level: -1 } }),
-      }, /Expected integer between 0 and 256 for level but received -1 of type number/);
+        /Expected integer between 0 and 256 for openSlide\.level but received -1 of type number/
+      );
+      assert.throws(
+        () => sharp({ level: -1 }),
+        /Expected integer between 0 and 256 for level but received -1 of type number/
+      );
     });
-    it('Valid subifd property', function () {
+    it('Valid tiff.subifd property', function () {
+      sharp({ tiff: { subifd: 1 } });
       sharp({ subifd: 1 });
     });
-    it('Invalid subifd property (string) throws', function () {
+    it('Invalid tiff.subifd property (string) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ subifd: '1' });
+        () => sharp({ tiff: { subifd: '1' } }),
-      }, /Expected integer between -1 and 100000 for subifd but received 1 of type string/);
+        /Expected integer between -1 and 100000 for tiff\.subifd but received 1 of type string/
+      );
+      assert.throws(
+        () => sharp({ subifd: '1' }),
+        /Expected integer between -1 and 100000 for subifd but received 1 of type string/
+      );
     });
-    it('Invalid subifd property (float) throws', function () {
+    it('Invalid tiff.subifd property (float) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ subifd: 1.2 });
+        () => sharp({ tiff: { subifd: 1.2 } }),
-      }, /Expected integer between -1 and 100000 for subifd but received 1.2 of type number/);
+        /Expected integer between -1 and 100000 for tiff\.subifd but received 1.2 of type number/
+      );
+      assert.throws(
+        () => sharp({ subifd: 1.2 }),
+        /Expected integer between -1 and 100000 for subifd but received 1.2 of type number/
+      );
     });
-    it('Valid pdfBackground property (string)', function () {
+    it('Valid pdf.background property (string)', function () {
+      sharp({ pdf: { background: '#00ff00' } });
       sharp({ pdfBackground: '#00ff00' });
     });
-    it('Valid pdfBackground property (object)', function () {
+    it('Valid pdf.background property (object)', function () {
+      sharp({ pdf: { background: { r: 0, g: 255, b: 0 } } });
       sharp({ pdfBackground: { r: 0, g: 255, b: 0 } });
     });
-    it('Invalid pdfBackground property (string) throws', function () {
+    it('Invalid pdf.background property (string) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ pdfBackground: '00ff00' });
+        () => sharp({ pdf: { background: '00ff00' } }),
-      }, /Unable to parse color from string/);
+        /Unable to parse color from string/
+      );
+      assert.throws(
+        () => sharp({ pdfBackground: '00ff00' }),
+        /Unable to parse color from string/
+      );
     });
-    it('Invalid pdfBackground property (number) throws', function () {
+    it('Invalid pdf.background property (number) throws', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ pdfBackground: 255 });
+        () => sharp({ pdf: { background: 255 } }),
-      }, /Expected object or string for background/);
+        /Expected object or string for background/
+      );
+      assert.throws(
+        () => sharp({ pdf: { background: 255 } }),
+        /Expected object or string for background/
+      );
     });
-    it('Invalid pdfBackground property (object)', function () {
+    it('Invalid pdf.background property (object)', function () {
-      assert.throws(function () {
+      assert.throws(
-        sharp({ pdfBackground: { red: 0, green: 255, blue: 0 } });
+        () => sharp({ pdf: { background: { red: 0, green: 255, blue: 0 } } }),
-      }, /Unable to parse color from object/);
+        /Unable to parse color from object/
+      );
+      assert.throws(
+        () => sharp({ pdfBackground: { red: 0, green: 255, blue: 0 } }),
+        /Unable to parse color from object/
+      );
     });
   });
 

test/unit/jp2.js

@@ -117,14 +117,14 @@ describe('JP2 output', () => {
 
   it('valid JP2 oneshot value does not throw error', () => {
     assert.doesNotThrow(
-      () => sharp(fixtures.inputJp2TileParts, { jp2Oneshot: true })
+      () => sharp({ jp2: { oneshot: true } })
     );
   });
 
   it('invalid JP2 oneshot value throws error', () => {
     assert.throws(
-      () => sharp(fixtures.inputJp2TileParts, { jp2Oneshot: 'fail' }),
+      () => sharp({ jp2: { oneshot: 'fail' } }),
-      /Expected boolean for jp2Oneshot but received fail of type string/
+      /Expected boolean for jp2.oneshot but received fail of type string/
     );
   });
 });

test/unit/svg.js

@@ -139,6 +139,41 @@ describe('SVG input', function () {
     assert.strictEqual(info.channels, 4);
   });
 
+  it('Can apply custom CSS', async () => {
+    const svg = `<?xml version="1.0" encoding="UTF-8"?>
+      <svg  width="10" height="10" xmlns="http://www.w3.org/2000/svg">
+        <circle cx="5" cy="5" r="4" fill="green" />
+      </svg>`;
+    const stylesheet = 'circle { fill: red }';
+
+    const [r, g, b, a] = await sharp(Buffer.from(svg), { svg: { stylesheet } })
+      .extract({ left: 5, top: 5, width: 1, height: 1 })
+      .raw()
+      .toBuffer();
+
+    assert.deepEqual([r, g, b, a], [255, 0, 0, 255]);
+  });
+
+  it('Invalid stylesheet input option throws', () =>
+    assert.throws(
+      () => sharp({ svg: { stylesheet: 123 } }),
+      /Expected string for svg\.stylesheet but received 123 of type number/
+    )
+  );
+
+  it('Valid highBitdepth input option does not throw', () =>
+    assert.doesNotThrow(
+      () => sharp({ svg: { highBitdepth: true } })
+    )
+  );
+
+  it('Invalid highBitdepth input option throws', () =>
+    assert.throws(
+      () => sharp({ svg: { highBitdepth: 123 } }),
+      /Expected boolean for svg\.highBitdepth but received 123 of type number/
+    )
+  );
+
   it('Fails to render SVG larger than 32767x32767', () =>
     assert.rejects(
       () => sharp(Buffer.from('<svg xmlns="http://www.w3.org/2000/svg" width="32768" height="1" />')).toBuffer(),