diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03dc9797e..3ea229d83 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [v0.0.6] - TBD
 
-Uses libvips v8.14.5, compiled with Emscripten v3.1.46.
+Uses libvips v8.15.0, compiled with Emscripten v3.1.46.
+
+### Changed
+
+- Update methods/enums for libvips 8.15.
 
 ## [v0.0.5] - 2023-04-27
 
diff --git a/build.sh b/build.sh
index 98c6ac04b..711336af4 100755
--- a/build.sh
+++ b/build.sh
@@ -183,7 +183,7 @@ VERSION_TIFF=4.6.0          # https://gitlab.com/libtiff/libtiff
 VERSION_RESVG=0.36.0        # https://github.com/RazrFalcon/resvg
 VERSION_AOM=3.7.0           # https://aomedia.googlesource.com/aom
 VERSION_HEIF=1.16.2         # https://github.com/strukturag/libheif
-VERSION_VIPS=8.14.5         # https://github.com/libvips/libvips
+VERSION_VIPS=32ddfe7        # https://github.com/libvips/libvips
 
 # Remove patch version component
 without_patch() {
@@ -450,14 +450,14 @@ node --version
 [ -f "$TARGET/lib/pkgconfig/vips.pc" ] || (
   stage "Compiling vips"
   mkdir $DEPS/vips
-  curl -Ls https://github.com/libvips/libvips/releases/download/v$VERSION_VIPS/vips-$(without_prerelease $VERSION_VIPS).tar.xz | tar xJC $DEPS/vips --strip-components=1
+  curl -Ls https://github.com/libvips/libvips/archive/$VERSION_VIPS.tar.gz | tar xzC $DEPS/vips --strip-components=1
   cd $DEPS/vips
   # Emscripten specific patches
-  curl -Ls https://github.com/libvips/libvips/compare/v$VERSION_VIPS...kleisauke:wasm-vips-8.14.patch | patch -p1
+  curl -Ls https://github.com/libvips/libvips/compare/$VERSION_VIPS...kleisauke:wasm-vips-8.15.patch | patch -p1
   # Disable building man pages, gettext po files, tools, and (fuzz-)tests
   sed -i "/subdir('man')/{N;N;N;N;d;}" meson.build
   meson setup _build --prefix=$TARGET --cross-file=$MESON_CROSS --default-library=static --buildtype=release \
-    -Ddeprecated=false -Dexamples=false -Dcplusplus=$LIBVIPS_CPP -Dintrospection=false -Dauto_features=disabled \
+    -Ddeprecated=false -Dexamples=false -Dcplusplus=$LIBVIPS_CPP -Dauto_features=disabled \
     ${ENABLE_MODULES:+-Dmodules=enabled} -Dcgif=enabled -Dexif=enabled ${ENABLE_AVIF:+-Dheif=enabled} \
     -Dheif-module=enabled -Dimagequant=enabled -Djpeg=enabled ${ENABLE_JXL:+-Djpeg-xl=enabled} \
     -Djpeg-xl-module=enabled -Dlcms=enabled ${ENABLE_SVG:+-Dresvg=enabled} -Dresvg-module=enabled \
diff --git a/build/preamble_vips.d.ts b/build/preamble_vips.d.ts
index 2d8ceab6a..ffe09c920 100644
--- a/build/preamble_vips.d.ts
+++ b/build/preamble_vips.d.ts
@@ -576,6 +576,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -641,6 +645,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -663,6 +671,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -966,6 +978,10 @@ declare module Vips {
              * Color for background pixels.
              */
             background?: ArrayConstant
+            /**
+             * Enable line art mode.
+             */
+            line_art?: boolean
         }): {
             /**
              * Output left edge.
diff --git a/lib/vips.d.ts b/lib/vips.d.ts
index e97c352a1..1a0069e2d 100644
--- a/lib/vips.d.ts
+++ b/lib/vips.d.ts
@@ -576,6 +576,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -641,6 +645,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -663,6 +671,10 @@ declare module Vips {
              * loaders are permissive, that is, [[FailOn.none]].
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
         }): Image;
 
         /**
@@ -966,6 +978,10 @@ declare module Vips {
              * Color for background pixels.
              */
             background?: ArrayConstant
+            /**
+             * Enable line art mode.
+             */
+            line_art?: boolean
         }): {
             /**
              * Output left edge.
@@ -1722,30 +1738,28 @@ declare module Vips {
     }
 
     /**
-     * See vips_image_pipelinev(). Operations can hint to the VIPS image IO
-     * system about the kind of demand geometry they prefer.
+     * See vips_image_pipelinev(). Operations can hint
+     * the kind of demand geometry they prefer
+     * to the VIPS image IO system.
      *
      * These demand styles are given below in order of increasing
-     * restrictiveness.  When demanding output from a pipeline,
+     * specialisation.  When demanding output from a pipeline,
      * vips_image_generate()
-     * will use the most restrictive of the styles requested by the operations
+     * will use the most general style requested by the operations
      * in the pipeline.
      *
-     * #VIPS_DEMAND_STYLE_THINSTRIP --- This operation would like to output strips
-     * the width of the image and a few pels high. This is option suitable for
-     * point-to-point operations, such as those in the arithmetic package.
-     *
-     * This option is only efficient for cases where each output pel depends
-     * upon the pel in the corresponding position in the input image.
+     * #VIPS_DEMAND_STYLE_SMALLTILE --- This is the most general demand format.
+     * Output is demanded in small (around 100x100 pel) sections. This style works
+     * reasonably efficiently, even for bizarre operations like 45 degree rotate.
      *
      * #VIPS_DEMAND_STYLE_FATSTRIP --- This operation would like to output strips
      * the width of the image and as high as possible. This option is suitable
      * for area operations which do not violently transform coordinates, such
      * as vips_conv().
      *
-     * #VIPS_DEMAND_STYLE_SMALLTILE --- This is the most general demand format.
-     * Output is demanded in small (around 100x100 pel) sections. This style works
-     * reasonably efficiently, even for bizzare operations like 45 degree rotate.
+     * #VIPS_DEMAND_STYLE_THINSTRIP --- This operation would like to output strips
+     * the width of the image and a few pels high. This option is suitable for
+     * point-to-point operations, such as those in the arithmetic package.
      *
      * #VIPS_DEMAND_STYLE_ANY --- This image is not being demand-read from a disc
      * file (even indirectly) so any demand style is OK. It's used for things like
@@ -1755,11 +1769,11 @@ declare module Vips {
      */
     enum DemandStyle {
         /**
-         * Demand in small (typically 64x64 pixel) tiles
+         * Demand in small (typically 128x128 pixel) tiles
          */
         smalltile = 'smalltile',
         /**
-         * Demand in fat (typically 10 pixel high) strips
+         * Demand in fat (typically 16 pixel high) strips
          */
         fatstrip = 'fatstrip',
         /**
@@ -1829,15 +1843,15 @@ declare module Vips {
      */
     enum OperationMath2 {
         /**
-         * Pow( left, right )
+         * Pow(left, right)
          */
         pow = 'pow',
         /**
-         * Pow( right, left )
+         * Pow(right, left)
          */
         wop = 'wop',
         /**
-         * Atan2( left, right )
+         * Atan2(left, right)
          */
         atan2 = 'atan2'
     }
@@ -2768,6 +2782,40 @@ declare module Vips {
         add = 'add'
     }
 
+    /**
+     * Which metadata to retain.
+     */
+    enum ForeignKeep {
+        /**
+         * Don't attach metadata
+         */
+        none = 'none',
+        /**
+         * Keep Exif metadata
+         */
+        exif = 'exif',
+        /**
+         * Keep XMP metadata
+         */
+        xmp = 'xmp',
+        /**
+         * Keep IPTC metadata
+         */
+        iptc = 'iptc',
+        /**
+         * Keep ICC metadata
+         */
+        icc = 'icc',
+        /**
+         * Keep other metadata (e.g. PNG comments and some TIFF tags)
+         */
+        other = 'other',
+        /**
+         * Keep all metadata
+         */
+        all = 'all'
+    }
+
     /**
      * http://www.w3.org/TR/PNG-Filters.html
      * The values mirror those of png.h in libpng.
@@ -2825,6 +2873,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -2937,6 +2989,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -2978,6 +3034,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3021,6 +3081,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3046,6 +3110,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3128,6 +3196,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3161,6 +3233,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3194,6 +3270,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3249,6 +3329,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3290,6 +3374,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3331,6 +3419,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3380,6 +3472,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3409,6 +3505,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3438,6 +3538,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3475,6 +3579,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3512,6 +3620,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3549,6 +3661,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3574,6 +3690,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3599,6 +3719,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3624,6 +3748,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3679,6 +3807,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -3716,6 +3848,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4029,6 +4165,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4054,6 +4194,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4079,6 +4223,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4104,6 +4252,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4129,6 +4281,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4154,6 +4310,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4199,6 +4359,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4244,6 +4408,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4293,6 +4461,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4342,6 +4514,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4391,6 +4567,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4442,6 +4622,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4471,6 +4655,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4500,6 +4688,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4525,6 +4717,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4550,6 +4746,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4582,6 +4782,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4607,6 +4811,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4632,6 +4840,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4672,6 +4884,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4738,6 +4954,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4775,6 +4995,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -4812,6 +5036,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5087,6 +5315,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5128,6 +5360,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5169,6 +5405,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5242,6 +5482,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5267,6 +5511,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5304,6 +5552,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5341,6 +5593,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5378,6 +5634,10 @@ declare module Vips {
              * Error level to fail on.
              */
             fail_on?: FailOn | Enum
+            /**
+             * Don't use a cached result for this operation.
+             */
+            revalidate?: boolean
             /**
              * Flags for this file (output).
              */
@@ -5924,7 +6184,7 @@ declare module Vips {
         convi(mask: Image | ArrayConstant): Image;
 
         /**
-         * Seperable convolution operation.
+         * Separable convolution operation.
          * @param mask Input matrix image.
          * @param options Optional options.
          * @return Output image.
@@ -6015,14 +6275,18 @@ declare module Vips {
          * @param options Optional options.
          */
         csvsave(filename: string, options?: {
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Separator characters.
              */
             separator?: string
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6039,14 +6303,18 @@ declare module Vips {
          * @param options Optional options.
          */
         csvsaveTarget(target: Target, options?: {
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Separator characters.
              */
             separator?: string
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6205,9 +6473,9 @@ declare module Vips {
          */
         dzsave(filename: string, options?: {
             /**
-             * Base name to save to.
+             * Image name.
              */
-            basename?: string
+            imagename?: string
             /**
              * Directory layout.
              */
@@ -6224,6 +6492,10 @@ declare module Vips {
              * Tile size in pixels.
              */
             tile_size?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Center image in tile.
              */
@@ -6252,18 +6524,18 @@ declare module Vips {
              * Skip tiles which are nearly equal to the background.
              */
             skip_blanks?: number
-            /**
-             * Don't strip tile metadata.
-             */
-            no_strip?: boolean
             /**
              * Resource id.
              */
             id?: string
             /**
-             * Strip all metadata from image.
+             * Q factor.
              */
-            strip?: boolean
+            Q?: number
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6281,9 +6553,9 @@ declare module Vips {
          */
         dzsaveBuffer(options?: {
             /**
-             * Base name to save to.
+             * Image name.
              */
-            basename?: string
+            imagename?: string
             /**
              * Directory layout.
              */
@@ -6300,6 +6572,10 @@ declare module Vips {
              * Tile size in pixels.
              */
             tile_size?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Center image in tile.
              */
@@ -6328,18 +6604,18 @@ declare module Vips {
              * Skip tiles which are nearly equal to the background.
              */
             skip_blanks?: number
-            /**
-             * Don't strip tile metadata.
-             */
-            no_strip?: boolean
             /**
              * Resource id.
              */
             id?: string
             /**
-             * Strip all metadata from image.
+             * Q factor.
+             */
+            Q?: number
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6357,9 +6633,9 @@ declare module Vips {
          */
         dzsaveTarget(target: Target, options?: {
             /**
-             * Base name to save to.
+             * Image name.
              */
-            basename?: string
+            imagename?: string
             /**
              * Directory layout.
              */
@@ -6376,6 +6652,10 @@ declare module Vips {
              * Tile size in pixels.
              */
             tile_size?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Center image in tile.
              */
@@ -6404,18 +6684,18 @@ declare module Vips {
              * Skip tiles which are nearly equal to the background.
              */
             skip_blanks?: number
-            /**
-             * Don't strip tile metadata.
-             */
-            no_strip?: boolean
             /**
              * Resource id.
              */
             id?: string
             /**
-             * Strip all metadata from image.
+             * Q factor.
              */
-            strip?: boolean
+            Q?: number
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6501,9 +6781,13 @@ declare module Vips {
          */
         fitssave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6607,6 +6891,10 @@ declare module Vips {
              * Quantisation effort.
              */
             effort?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Number of bits per pixel.
              */
@@ -6628,9 +6916,9 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6655,6 +6943,10 @@ declare module Vips {
              * Quantisation effort.
              */
             effort?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Number of bits per pixel.
              */
@@ -6676,9 +6968,9 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6703,6 +6995,10 @@ declare module Vips {
              * Quantisation effort.
              */
             effort?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Number of bits per pixel.
              */
@@ -6724,9 +7020,9 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6795,6 +7091,10 @@ declare module Vips {
              * Number of bits per pixel.
              */
             bitdepth?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Enable lossless compression.
              */
@@ -6816,9 +7116,9 @@ declare module Vips {
              */
             encoder?: ForeignHeifEncoder | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6843,6 +7143,10 @@ declare module Vips {
              * Number of bits per pixel.
              */
             bitdepth?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Enable lossless compression.
              */
@@ -6864,9 +7168,9 @@ declare module Vips {
              */
             encoder?: ForeignHeifEncoder | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -6891,6 +7195,10 @@ declare module Vips {
              * Number of bits per pixel.
              */
             bitdepth?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Enable lossless compression.
              */
@@ -6912,9 +7220,9 @@ declare module Vips {
              */
             encoder?: ForeignHeifEncoder | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7249,6 +7557,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -7266,9 +7578,9 @@ declare module Vips {
              */
             subsample_mode?: ForeignSubsample | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7289,6 +7601,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -7306,9 +7622,9 @@ declare module Vips {
              */
             subsample_mode?: ForeignSubsample | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7329,6 +7645,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -7346,9 +7666,9 @@ declare module Vips {
              */
             subsample_mode?: ForeignSubsample | Enum
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7370,7 +7690,7 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -7406,9 +7726,9 @@ declare module Vips {
              */
             restart_interval?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7430,7 +7750,7 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -7466,9 +7786,9 @@ declare module Vips {
              */
             restart_interval?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7489,7 +7809,7 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -7525,9 +7845,9 @@ declare module Vips {
              */
             restart_interval?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7549,7 +7869,7 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -7585,9 +7905,9 @@ declare module Vips {
              */
             restart_interval?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7612,6 +7932,10 @@ declare module Vips {
              * Target butteraugli distance.
              */
             distance?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Encoding effort.
              */
@@ -7625,9 +7949,9 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7652,6 +7976,10 @@ declare module Vips {
              * Target butteraugli distance.
              */
             distance?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Encoding effort.
              */
@@ -7665,9 +7993,9 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7692,6 +8020,10 @@ declare module Vips {
              * Target butteraugli distance.
              */
             distance?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Encoding effort.
              */
@@ -7705,9 +8037,9 @@ declare module Vips {
              */
             Q?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7795,9 +8127,13 @@ declare module Vips {
              */
             bitdepth?: number
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7835,9 +8171,13 @@ declare module Vips {
              */
             bitdepth?: number
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7946,9 +8286,13 @@ declare module Vips {
          */
         matrixprint(options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7966,9 +8310,13 @@ declare module Vips {
          */
         matrixsave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -7986,9 +8334,13 @@ declare module Vips {
          */
         matrixsaveTarget(target: Target, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8231,9 +8583,13 @@ declare module Vips {
          */
         niftisave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8273,7 +8629,7 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -8301,9 +8657,9 @@ declare module Vips {
              */
             effort?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8329,7 +8685,7 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -8357,9 +8713,9 @@ declare module Vips {
              */
             effort?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8385,7 +8741,7 @@ declare module Vips {
              */
             interlace?: boolean
             /**
-             * Icc profile to embed.
+             * Filename of icc profile to embed.
              */
             profile?: string
             /**
@@ -8413,9 +8769,9 @@ declare module Vips {
              */
             effort?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8440,14 +8796,18 @@ declare module Vips {
              * Save as ascii.
              */
             ascii?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Set to 1 to write as a 1 bit image.
              */
             bitdepth?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8472,14 +8832,18 @@ declare module Vips {
              * Save as ascii.
              */
             ascii?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Set to 1 to write as a 1 bit image.
              */
             bitdepth?: number
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8502,6 +8866,12 @@ declare module Vips {
             max_alpha?: number
         }): Image;
 
+        /**
+         * Prewitt edge detector.
+         * @return Output image.
+         */
+        prewitt(): Image;
+
         /**
          * Resample an image with a quadratic transform.
          * @param coeff Coefficient matrix.
@@ -8528,9 +8898,13 @@ declare module Vips {
          */
         radsave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8548,9 +8922,13 @@ declare module Vips {
          */
         radsaveBuffer(options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8568,9 +8946,13 @@ declare module Vips {
          */
         radsaveTarget(target: Target, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8597,9 +8979,13 @@ declare module Vips {
          */
         rawsave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8617,9 +9003,13 @@ declare module Vips {
          */
         rawsaveFd(fd: number, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
              */
-            strip?: boolean
+            profile?: string
+            /**
+             * Which metadata to retain.
+             */
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -8850,6 +9240,12 @@ declare module Vips {
             log?: boolean
         }): Image;
 
+        /**
+         * Scharr edge detector.
+         * @return Output image.
+         */
+        scharr(): Image;
+
         /**
          * Check sequential access.
          * @param options Optional options.
@@ -8992,6 +9388,10 @@ declare module Vips {
              * How to measure interestingness.
              */
             interesting?: Interesting | Enum
+            /**
+             * Input image already has premultiplied alpha.
+             */
+            premultiplied?: boolean
             /**
              * Horizontal position of attention centre (output).
              */
@@ -9137,10 +9537,6 @@ declare module Vips {
              * Compression prediction.
              */
             predictor?: ForeignTiffPredictor | Enum
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Write a tiled tiff.
              */
@@ -9149,6 +9545,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -9210,9 +9610,9 @@ declare module Vips {
              */
             premultiply?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9241,10 +9641,6 @@ declare module Vips {
              * Compression prediction.
              */
             predictor?: ForeignTiffPredictor | Enum
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Write a tiled tiff.
              */
@@ -9253,6 +9649,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -9314,9 +9714,9 @@ declare module Vips {
              */
             premultiply?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9345,10 +9745,6 @@ declare module Vips {
              * Compression prediction.
              */
             predictor?: ForeignTiffPredictor | Enum
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Write a tiled tiff.
              */
@@ -9357,6 +9753,10 @@ declare module Vips {
              * Tile width in pixels.
              */
             tile_width?: number
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Tile height in pixels.
              */
@@ -9418,9 +9818,9 @@ declare module Vips {
              */
             premultiply?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9498,9 +9898,13 @@ declare module Vips {
          */
         vipssave(filename: string, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9518,9 +9922,13 @@ declare module Vips {
          */
         vipssaveTarget(target: Target, options?: {
             /**
-             * Strip all metadata from image.
+             * Filename of icc profile to embed.
+             */
+            profile?: string
+            /**
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9545,6 +9953,10 @@ declare module Vips {
              * Enable lossless compression.
              */
             lossless?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Preset for lossy compression.
              */
@@ -9577,18 +9989,14 @@ declare module Vips {
              * Level of cpu effort to reduce file size.
              */
             effort?: number
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Allow mixed encoding (might reduce file size).
              */
             mixed?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9613,6 +10021,10 @@ declare module Vips {
              * Enable lossless compression.
              */
             lossless?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Preset for lossy compression.
              */
@@ -9645,18 +10057,14 @@ declare module Vips {
              * Level of cpu effort to reduce file size.
              */
             effort?: number
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Allow mixed encoding (might reduce file size).
              */
             mixed?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9680,6 +10088,10 @@ declare module Vips {
              * Enable lossless compression.
              */
             lossless?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Preset for lossy compression.
              */
@@ -9712,18 +10124,14 @@ declare module Vips {
              * Level of cpu effort to reduce file size.
              */
             effort?: number
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Allow mixed encoding (might reduce file size).
              */
             mixed?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
@@ -9748,6 +10156,10 @@ declare module Vips {
              * Enable lossless compression.
              */
             lossless?: boolean
+            /**
+             * Filename of icc profile to embed.
+             */
+            profile?: string
             /**
              * Preset for lossy compression.
              */
@@ -9780,18 +10192,14 @@ declare module Vips {
              * Level of cpu effort to reduce file size.
              */
             effort?: number
-            /**
-             * Icc profile to embed.
-             */
-            profile?: string
             /**
              * Allow mixed encoding (might reduce file size).
              */
             mixed?: boolean
             /**
-             * Strip all metadata from image.
+             * Which metadata to retain.
              */
-            strip?: boolean
+            keep?: ForeignKeep | Flag
             /**
              * Background value.
              */
diff --git a/src/bindings/vips-operators.cpp b/src/bindings/vips-operators.cpp
index d99f48136..677fd369d 100644
--- a/src/bindings/vips-operators.cpp
+++ b/src/bindings/vips-operators.cpp
@@ -3186,6 +3186,18 @@ Image Image::premultiply(emscripten::val js_options) const
     return out;
 }
 
+Image Image::prewitt() const
+{
+    Image out;
+
+    this->call("prewitt",
+               (new Option)
+                   ->set("in", *this)
+                   ->set("out", &out));
+
+    return out;
+}
+
 Image Image::profile(Image *rows) const
 {
     Image columns;
@@ -3546,6 +3558,18 @@ Image Image::scale(emscripten::val js_options) const
     return out;
 }
 
+Image Image::scharr() const
+{
+    Image out;
+
+    this->call("scharr",
+               (new Option)
+                   ->set("in", *this)
+                   ->set("out", &out));
+
+    return out;
+}
+
 Image Image::sequential(emscripten::val js_options) const
 {
     Image out;
diff --git a/src/bindings/vips-operators.h b/src/bindings/vips-operators.h
index f3742cdeb..a5837bb92 100644
--- a/src/bindings/vips-operators.h
+++ b/src/bindings/vips-operators.h
@@ -1068,7 +1068,7 @@ Image convf(emscripten::val mask) const;
 Image convi(emscripten::val mask) const;
 
 /**
- * Seperable convolution operation.
+ * Separable convolution operation.
  * @param mask Input matrix image.
  * @param js_options Optional options.
  * @return Output image.
@@ -1889,6 +1889,12 @@ void ppmsave_target(const Target &target, emscripten::val js_options = emscripte
  */
 Image premultiply(emscripten::val js_options = emscripten::val::null()) const;
 
+/**
+ * Prewitt edge detector.
+ * @return Output image.
+ */
+Image prewitt() const;
+
 /**
  * Find image profiles.
  * @param rows First non-zero pixel in row.
@@ -2092,6 +2098,12 @@ Image scRGB2sRGB(emscripten::val js_options = emscripten::val::null()) const;
  */
 Image scale(emscripten::val js_options = emscripten::val::null()) const;
 
+/**
+ * Scharr edge detector.
+ * @return Output image.
+ */
+Image scharr() const;
+
 /**
  * Check sequential access.
  * @param js_options Optional options.
diff --git a/src/vips-emscripten.cpp b/src/vips-emscripten.cpp
index d5180a4ef..2036cc58c 100644
--- a/src/vips-emscripten.cpp
+++ b/src/vips-emscripten.cpp
@@ -399,6 +399,15 @@ EMSCRIPTEN_BINDINGS(my_module) {
         .value("set", VIPS_COMBINE_MODE_SET)
         .value("add", VIPS_COMBINE_MODE_ADD);
 
+    enum_<VipsForeignKeep>("ForeignKeep")
+        .value("none", VIPS_FOREIGN_KEEP_NONE)
+        .value("exif", VIPS_FOREIGN_KEEP_EXIF)
+        .value("xmp", VIPS_FOREIGN_KEEP_XMP)
+        .value("iptc", VIPS_FOREIGN_KEEP_IPTC)
+        .value("icc", VIPS_FOREIGN_KEEP_ICC)
+        .value("other", VIPS_FOREIGN_KEEP_OTHER)
+        .value("all", VIPS_FOREIGN_KEEP_ALL);
+
     enum_<VipsForeignPngFilter>("ForeignPngFilter")
         .value("none", VIPS_FOREIGN_PNG_FILTER_NONE)
         .value("sub", VIPS_FOREIGN_PNG_FILTER_SUB)
@@ -1847,6 +1856,7 @@ EMSCRIPTEN_BINDINGS(my_module) {
         .function("premultiply", optional_override([](const Image &image) {
                       return image.premultiply();
                   }))
+        .function("prewitt", &Image::prewitt)
         .function("quadratic", &Image::quadratic)
         .function("quadratic", optional_override([](const Image &image, emscripten::val coeff) {
                       return image.quadratic(coeff);
@@ -1914,6 +1924,7 @@ EMSCRIPTEN_BINDINGS(my_module) {
         .function("scale", optional_override([](const Image &image) {
                       return image.scale();
                   }))
+        .function("scharr", &Image::scharr)
         .function("sequential", &Image::sequential)
         .function("sequential", optional_override([](const Image &image) {
                       return image.sequential();
diff --git a/test/bench/index.html b/test/bench/index.html
index fddf6269d..f1893d052 100644
--- a/test/bench/index.html
+++ b/test/bench/index.html
@@ -13,8 +13,9 @@
 <script type="module">
   const width = 720;
 
-  // vips_thumbnail resize behavior is based on a square bounding box, so
-  // pass a huge value to resize on a specific axis instead.
+  // `vips_thumbnail` resize behavior is based on a square bounding box.
+  // To resize along a specific axis, pass a huge value to the opposite axis.
+  // See: https://github.com/libvips/libvips/pull/1639
   const height = 10000000; // = VIPS_MAX_COORD
 
   // https://www.flickr.com/photos/grizdave/2569067123/
@@ -42,18 +43,18 @@
 
   const inputJpgBuffer = vips.FS.readFile(jpegFile);
   const defaultJpegSaveOptions = {
-    strip: true,
+    keep: vips.ForeignKeep.none,
     Q: 80
   }
   const inputPngBuffer = vips.FS.readFile(pngFile);
   const defaultPngSaveOptions = {
-    strip: true,
+    keep: vips.ForeignKeep.none,
     compression: 6,
     filter: vips.ForeignPngFilter.none
   }
   const inputWebPBuffer = vips.FS.readFile(webpFile);
   const defaultWebPSaveOptions = {
-    strip: true,
+    keep: vips.ForeignKeep.none,
     Q: 80
   }
 
diff --git a/test/bench/perf.js b/test/bench/perf.js
index 51580ee93..945bfbab4 100644
--- a/test/bench/perf.js
+++ b/test/bench/perf.js
@@ -8,8 +8,9 @@ import { inputJpg, inputPng, inputWebP, getPath } from './images.js';
 
 const width = 720;
 
-// vips_thumbnail resize behavior is based on a square bounding box, so
-// pass a huge value to resize on a specific axis instead.
+// `vips_thumbnail` resize behavior is based on a square bounding box.
+// To resize along a specific axis, pass a huge value to the opposite axis.
+// See: https://github.com/libvips/libvips/pull/1639
 const height = 10000000; // = VIPS_MAX_COORD
 
 const jpegOut = getPath('output.jpg');
@@ -31,18 +32,18 @@ vips.Cache.max(0);
 
 const inputJpgBuffer = vips.FS.readFile(inputJpg);
 const defaultJpegSaveOptions = {
-  strip: true,
+  keep: vips.ForeignKeep.none,
   Q: 80
 };
 const inputPngBuffer = vips.FS.readFile(inputPng);
 const defaultPngSaveOptions = {
-  strip: true,
+  keep: vips.ForeignKeep.none,
   compression: 6,
   filter: vips.ForeignPngFilter.none
 };
 const inputWebPBuffer = vips.FS.readFile(inputWebP);
 const defaultWebPSaveOptions = {
-  strip: true,
+  keep: vips.ForeignKeep.none,
   Q: 80
 };
 
diff --git a/test/unit/test_arithmetic.js b/test/unit/test_arithmetic.js
index cce9f023a..fcabddeff 100644
--- a/test/unit/test_arithmetic.js
+++ b/test/unit/test_arithmetic.js
@@ -758,6 +758,7 @@ describe('arithmetic', () => {
 
     const testRgb = test.bandjoin([test, test]);
     const trim = testRgb.findTrim({
+      line_art: true,
       background: [255, 255, 255]
     });
 
diff --git a/test/unit/test_colour.js b/test/unit/test_colour.js
index 654d6d0e9..f184d07d9 100644
--- a/test/unit/test_colour.js
+++ b/test/unit/test_colour.js
@@ -29,7 +29,11 @@ describe('colour', () => {
       }
 
       const pixel = im.getpoint(10, 10);
-      expect(pixel[3]).to.be.closeTo(42, 0.01);
+      if (col === 'scrgb') {
+        expect(pixel[3]).to.be.closeTo(42.0 / 255.0, 0.0001);
+      } else {
+        expect(pixel[3]).to.be.closeTo(42, 0.01);
+      }
     }
 
     // alpha won't be equal for RGB16, but it should be preserved if we go
diff --git a/test/unit/test_create.js b/test/unit/test_create.js
index 2107da0dc..f3f7678b1 100644
--- a/test/unit/test_create.js
+++ b/test/unit/test_create.js
@@ -496,12 +496,14 @@ describe('create', () => {
       return this.skip();
     }
 
-    let im = vips.Image.text('Hello, world!');
+    let im = vips.Image.text('Hello, world!', {
+      dpi: 300
+    });
     expect(im.width).to.be.above(10);
     expect(im.height).to.be.above(10);
     expect(im.bands).to.equal(1);
     expect(im.format).to.equal('uchar');
-    expect(im.max()).to.equal(255);
+    expect(im.max()).to.be.above(240);
     expect(im.min()).to.equal(0);
 
     // test autofit
diff --git a/test/unit/test_foreign.js b/test/unit/test_foreign.js
index cd06c48d1..b157f10dc 100644
--- a/test/unit/test_foreign.js
+++ b/test/unit/test_foreign.js
@@ -148,7 +148,7 @@ describe('foreign', () => {
 
   it('vips', function () {
     // ftruncate() is not yet available in the Node backend of WasmFS.
-    // https://github.com/emscripten-core/emscripten/blob/3.1.42/system/lib/wasmfs/backends/node_backend.cpp#L120-L122
+    // https://github.com/emscripten-core/emscripten/blob/3.1.46/system/lib/wasmfs/backends/node_backend.cpp#L120-L122
     if (typeof vips.FS.statBufToObject === 'function') {
       return this.skip();
     }
@@ -399,6 +399,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(290);
       expect(im.height).to.equal(442);
       expect(im.bands).to.equal(3);
+      expect(im.getInt('bits-per-sample')).to.equal(16);
     };
 
     fileLoader('pngload', Helpers.pngFile, pngValid);
@@ -434,6 +435,7 @@ describe('foreign', () => {
     });
     const after = vips.Image.newFromBuffer(buf, '');
     expect(onebit.subtract(after).abs().max()).to.equal(0);
+    expect(after.getInt('bits-per-sample')).to.equal(1);
 
     // we can't test palette save since we can't be sure libimagequant is
     // available and there's no easy test for its presence
@@ -452,6 +454,13 @@ describe('foreign', () => {
       const y = vips.Image.newFromBuffer(buf, '');
       expect(y.getInt('orientation')).to.equal(2);
     }
+
+    // Add EXIF to new PNG
+    const im1 = vips.Image.black(8, 8);
+    im1.setString('exif-ifd0-ImageDescription', 'test description');
+    const im2 = vips.Image.newFromBuffer(im1.pngsaveBuffer(), '');
+    expect(im2.getString('exif-ifd0-ImageDescription')).to.satisfy(desc =>
+      desc.startsWith('test description'));
   });
 
   it('tiff', function () {
@@ -466,6 +475,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(290);
       expect(im.height).to.equal(442);
       expect(im.bands).to.equal(3);
+      expect(im.getInt('bits-per-sample')).to.equal(16);
     };
 
     fileLoader('tiffload', Helpers.tifFile, tiffValid);
@@ -479,6 +489,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(256);
       expect(im.height).to.equal(4);
       expect(im.bands).to.equal(1);
+      expect(im.getInt('bits-per-sample')).to.equal(1);
     };
 
     fileLoader('tiffload', Helpers.tif1File, tiff1Valid);
@@ -491,6 +502,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(256);
       expect(im.height).to.equal(4);
       expect(im.bands).to.equal(1);
+      expect(im.getInt('bits-per-sample')).to.equal(2);
     };
 
     fileLoader('tiffload', Helpers.tif2File, tiff2Valid);
@@ -503,6 +515,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(256);
       expect(im.height).to.equal(4);
       expect(im.bands).to.equal(1);
+      expect(im.getInt('bits-per-sample')).to.equal(4);
     };
 
     fileLoader('tiffload', Helpers.tif4File, tiff4Valid);
@@ -753,17 +766,24 @@ describe('foreign', () => {
       expect(im.width).to.equal(159);
       expect(im.height).to.equal(203);
       expect(im.bands).to.equal(3);
+      expect(im.getInt('bits-per-sample')).to.equal(4);
     };
 
     fileLoader('gifload', Helpers.gifFile, gifValid);
     bufferLoader('gifload_buffer', Helpers.gifFile, gifValid);
 
     // test metadata
-    let x1 = vips.Image.newFromFile(Helpers.gifAnimFile, { n: -1 });
+    let x1 = vips.Image.newFromFile(Helpers.gifFile, { n: -1 });
+    expect(x1.getInt('n-pages')).to.equal(1);
+    expect(x1.getArrayDouble('background')).to.deep.equal([81.0, 81.0, 81.0]);
+    expect(x1.getInt('interlaced')).to.equal(1);
+
+    x1 = vips.Image.newFromFile(Helpers.gifAnimFile, { n: -1 });
     // our test gif has delay 0 for the first frame set in error
     expect(x1.getArrayInt('delay')).to.deep.equal([0, 50, 50, 50, 50]);
     expect(x1.getInt('loop')).to.equal(32761);
     expect(x1.getArrayDouble('background')).to.deep.equal([255.0, 255.0, 255.0]);
+    expect(x1.getTypeof('interlaced')).to.equal(0);
     // test deprecated fields too
     expect(x1.getInt('gif-loop')).to.equal(32760);
     expect(x1.getInt('gif-delay')).to.equal(0);
@@ -961,6 +981,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(3024);
       expect(im.height).to.equal(4032);
       expect(im.bands).to.equal(3);
+      expect(im.getInt('bits-per-sample')).to.equal(8);
     };
 
     fileLoader('heifload', Helpers.avifFile, heifValid);
@@ -1066,6 +1087,7 @@ describe('foreign', () => {
       expect(im.width).to.equal(290);
       expect(im.height).to.equal(442);
       expect(im.bands).to.equal(4);
+      expect(im.getInt('bits-per-sample')).to.equal(8);
     };
 
     fileLoader('jxlload', Helpers.jxlFile, jxlValid);
diff --git a/test/unit/test_iofuncs.js b/test/unit/test_iofuncs.js
index b0235ac32..e1180ce06 100644
--- a/test/unit/test_iofuncs.js
+++ b/test/unit/test_iofuncs.js
@@ -62,4 +62,39 @@ describe('iofuncs', () => {
 
     expect(s).to.deep.equal(t);
   });
+
+  it('revalidate', function () {
+    // ftruncate() is not yet available in the Node backend of WasmFS.
+    // https://github.com/emscripten-core/emscripten/blob/3.1.46/system/lib/wasmfs/backends/node_backend.cpp#L120-L122
+    if (typeof vips.FS.statBufToObject === 'function') {
+      return this.skip();
+    }
+
+    const filename = vips.Utils.tempName('%s.v');
+
+    const im1 = vips.Image.black(10, 10);
+    im1.writeToFile(filename);
+
+    const load1 = vips.Image.newFromFile(filename);
+    expect(load1.width).to.equal(im1.width);
+
+    const im2 = vips.Image.black(20, 20);
+    im2.writeToFile(filename);
+
+    // this will use the old, cached load
+    let load2 = vips.Image.newFromFile(filename);
+    expect(load2.width).to.equal(im1.width);
+
+    // load again with 'revalidate' and we should see the new image
+    load2 = vips.Image.newFromFile(filename, {
+      revalidate: true
+    });
+    expect(load2.width).to.equal(im2.width);
+
+    // load once more without revalidate and we should see the cached
+    // new image
+    load2 = vips.Image.newFromFile(filename);
+    load2.setDeleteOnClose(true);
+    expect(load2.width).to.equal(im2.width);
+  });
 });