Some godoc adjustments and image struct renames

18 files changed, 175 insertions, 86 deletions

diff --git a/resources/errorResource.go b/resources/errorResource.go
index 50f0be371..81375cc48 100644
--- a/resources/errorResource.go
+++ b/resources/errorResource.go
@@ -19,6 +19,7 @@ import (
 	"github.com/gohugoio/hugo/common/hugio"
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/media"
+	"github.com/gohugoio/hugo/resources/images"
 	"github.com/gohugoio/hugo/resources/images/exif"
 	"github.com/gohugoio/hugo/resources/resource"
 )
@@ -26,7 +27,7 @@ import (
 var (
 	_ error = (*errorResource)(nil)
 	// Imnage covers all current Resource implementations.
-	_ resource.Image = (*errorResource)(nil)
+	_ images.ImageResource = (*errorResource)(nil)
 	// The list of user facing and exported interfaces in resource.go
 	// Note that if we're missing some interface here, the user will still
 	// get an error, but not as pretty.
@@ -98,27 +99,27 @@ func (e *errorResource) Width() int {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Crop(spec string) (resource.Image, error) {
+func (e *errorResource) Crop(spec string) (images.ImageResource, error) {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Fill(spec string) (resource.Image, error) {
+func (e *errorResource) Fill(spec string) (images.ImageResource, error) {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Fit(spec string) (resource.Image, error) {
+func (e *errorResource) Fit(spec string) (images.ImageResource, error) {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Resize(spec string) (resource.Image, error) {
+func (e *errorResource) Resize(spec string) (images.ImageResource, error) {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Filter(filters ...any) (resource.Image, error) {
+func (e *errorResource) Filter(filters ...any) (images.ImageResource, error) {
 	panic(e.ResourceError)
 }
 
-func (e *errorResource) Exif() *exif.Exif {
+func (e *errorResource) Exif() *exif.ExifInfo {
 	panic(e.ResourceError)
 }
 
diff --git a/resources/image.go b/resources/image.go
index 86cc3251a..253caf735 100644
--- a/resources/image.go
+++ b/resources/image.go
@@ -49,12 +49,12 @@ import (
 )
 
 var (
-	_ resource.Image  = (*imageResource)(nil)
-	_ resource.Source = (*imageResource)(nil)
-	_ resource.Cloner = (*imageResource)(nil)
+	_ images.ImageResource = (*imageResource)(nil)
+	_ resource.Source      = (*imageResource)(nil)
+	_ resource.Cloner      = (*imageResource)(nil)
 )
 
-// ImageResource represents an image resource.
+// imageResource represents an image resource.
 type imageResource struct {
 	*images.Image
 
@@ -70,14 +70,14 @@ type imageResource struct {
 }
 
 type imageMeta struct {
-	Exif *exif.Exif
+	Exif *exif.ExifInfo
 }
 
-func (i *imageResource) Exif() *exif.Exif {
+func (i *imageResource) Exif() *exif.ExifInfo {
 	return i.root.getExif()
 }
 
-func (i *imageResource) getExif() *exif.Exif {
+func (i *imageResource) getExif() *exif.ExifInfo {
 	i.metaInit.Do(func() {
 		supportsExif := i.Format == images.JPEG || i.Format == images.TIFF
 		if !supportsExif {
@@ -137,6 +137,7 @@ func (i *imageResource) getExif() *exif.Exif {
 	return i.meta.Exif
 }
 
+// Cloneis for internal use.
 func (i *imageResource) Clone() resource.Resource {
 	gr := i.baseResource.Clone().(baseResource)
 	return &imageResource{
@@ -170,7 +171,7 @@ func (i *imageResource) cloneWithUpdates(u *transformationUpdate) (baseResource,
 // Resize resizes the image to the specified width and height using the specified resampling
 // filter and returns the transformed image. If one of width or height is 0, the image aspect
 // ratio is preserved.
-func (i *imageResource) Resize(spec string) (resource.Image, error) {
+func (i *imageResource) Resize(spec string) (images.ImageResource, error) {
 	conf, err := i.decodeImageConfig("resize", spec)
 	if err != nil {
 		return nil, err
@@ -182,8 +183,8 @@ func (i *imageResource) Resize(spec string) (resource.Image, error) {
 }
 
 // Crop the image to the specified dimensions without resizing using the given anchor point.
-// Space delimited config: 200x300 TopLeft
-func (i *imageResource) Crop(spec string) (resource.Image, error) {
+// Space delimited config, e.g. `200x300 TopLeft`.
+func (i *imageResource) Crop(spec string) (images.ImageResource, error) {
 	conf, err := i.decodeImageConfig("crop", spec)
 	if err != nil {
 		return nil, err
@@ -196,7 +197,7 @@ func (i *imageResource) Crop(spec string) (resource.Image, error) {
 
 // Fit scales down the image using the specified resample filter to fit the specified
 // maximum width and height.
-func (i *imageResource) Fit(spec string) (resource.Image, error) {
+func (i *imageResource) Fit(spec string) (images.ImageResource, error) {
 	conf, err := i.decodeImageConfig("fit", spec)
 	if err != nil {
 		return nil, err
@@ -209,8 +210,8 @@ func (i *imageResource) Fit(spec string) (resource.Image, error) {
 
 // Fill scales the image to the smallest possible size that will cover the specified dimensions,
 // crops the resized image to the specified dimensions using the given anchor point.
-// Space delimited config: 200x300 TopLeft
-func (i *imageResource) Fill(spec string) (resource.Image, error) {
+// Space delimited config, e.g. `200x300 TopLeft`.
+func (i *imageResource) Fill(spec string) (images.ImageResource, error) {
 	conf, err := i.decodeImageConfig("fill", spec)
 	if err != nil {
 		return nil, err
@@ -238,7 +239,7 @@ func (i *imageResource) Fill(spec string) (resource.Image, error) {
 	return img, err
 }
 
-func (i *imageResource) Filter(filters ...any) (resource.Image, error) {
+func (i *imageResource) Filter(filters ...any) (images.ImageResource, error) {
 	conf := images.GetDefaultImageConfig("filter", i.Proc.Cfg)
 
 	var gfilters []gift.Filter
@@ -264,7 +265,7 @@ const imageProcWorkers = 1
 
 var imageProcSem = make(chan bool, imageProcWorkers)
 
-func (i *imageResource) doWithImageConfig(conf images.ImageConfig, f func(src image.Image) (image.Image, error)) (resource.Image, error) {
+func (i *imageResource) doWithImageConfig(conf images.ImageConfig, f func(src image.Image) (image.Image, error)) (images.ImageResource, error) {
 	img, err := i.getSpec().imageCache.getOrCreate(i, conf, func() (*imageResource, image.Image, error) {
 		imageProcSem <- true
 		defer func() {
diff --git a/resources/image_test.go b/resources/image_test.go
index a7577e0a6..0bfef1db0 100644
--- a/resources/image_test.go
+++ b/resources/image_test.go
@@ -40,7 +40,6 @@ import (
 
 	"github.com/gohugoio/hugo/media"
 	"github.com/gohugoio/hugo/resources/images"
-	"github.com/gohugoio/hugo/resources/resource"
 	"github.com/google/go-cmp/cmp"
 
 	"github.com/gohugoio/hugo/htesting/hqt"
@@ -76,7 +75,7 @@ func TestImageTransformBasic(t *testing.T) {
 
 	fileCache := image.(specProvider).getSpec().FileCaches.ImageCache().Fs
 
-	assertWidthHeight := func(img resource.Image, w, h int) {
+	assertWidthHeight := func(img images.ImageResource, w, h int) {
 		c.Helper()
 		c.Assert(img, qt.Not(qt.IsNil))
 		c.Assert(img.Width(), qt.Equals, w)
@@ -162,7 +161,7 @@ func TestImageTransformFormat(t *testing.T) {
 
 	fileCache := image.(specProvider).getSpec().FileCaches.ImageCache().Fs
 
-	assertExtWidthHeight := func(img resource.Image, ext string, w, h int) {
+	assertExtWidthHeight := func(img images.ImageResource, ext string, w, h int) {
 		c.Helper()
 		c.Assert(img, qt.Not(qt.IsNil))
 		c.Assert(paths.Ext(img.RelPermalink()), qt.Equals, ext)
@@ -210,13 +209,13 @@ func TestImagePermalinkPublishOrder(t *testing.T) {
 				os.Remove(workDir)
 			}()
 
-			check1 := func(img resource.Image) {
+			check1 := func(img images.ImageResource) {
 				resizedLink := "/a/sunset_hu59e56ffff1bc1d8d122b1403d34e039f_90587_100x50_resize_q75_box.jpg"
 				c.Assert(img.RelPermalink(), qt.Equals, resizedLink)
 				assertImageFile(c, spec.PublishFs, resizedLink, 100, 50)
 			}
 
-			check2 := func(img resource.Image) {
+			check2 := func(img images.ImageResource) {
 				c.Assert(img.RelPermalink(), qt.Equals, "/a/sunset.jpg")
 				assertImageFile(c, spec.PublishFs, "a/sunset.jpg", 900, 562)
 			}
@@ -231,7 +230,7 @@ func TestImagePermalinkPublishOrder(t *testing.T) {
 			resized, err := orignal.Resize("100x50")
 			c.Assert(err, qt.IsNil)
 
-			check1(resized.(resource.Image))
+			check1(resized.(images.ImageResource))
 
 			if !checkOriginalFirst {
 				check2(orignal)
@@ -441,9 +440,9 @@ func TestImageExif(t *testing.T) {
 	c := qt.New(t)
 	fs := afero.NewMemMapFs()
 	spec := newTestResourceSpec(specDescriptor{fs: fs, c: c})
-	image := fetchResourceForSpec(spec, c, "sunset.jpg").(resource.Image)
+	image := fetchResourceForSpec(spec, c, "sunset.jpg").(images.ImageResource)
 
-	getAndCheckExif := func(c *qt.C, image resource.Image) {
+	getAndCheckExif := func(c *qt.C, image images.ImageResource) {
 		x := image.Exif()
 		c.Assert(x, qt.Not(qt.IsNil))
 
@@ -464,22 +463,22 @@ func TestImageExif(t *testing.T) {
 	}
 
 	getAndCheckExif(c, image)
-	image = fetchResourceForSpec(spec, c, "sunset.jpg").(resource.Image)
+	image = fetchResourceForSpec(spec, c, "sunset.jpg").(images.ImageResource)
 	// This will read from file cache.
 	getAndCheckExif(c, image)
 }
 
 func BenchmarkImageExif(b *testing.B) {
-	getImages := func(c *qt.C, b *testing.B, fs afero.Fs) []resource.Image {
+	getImages := func(c *qt.C, b *testing.B, fs afero.Fs) []images.ImageResource {
 		spec := newTestResourceSpec(specDescriptor{fs: fs, c: c})
-		images := make([]resource.Image, b.N)
+		imgs := make([]images.ImageResource, b.N)
 		for i := 0; i < b.N; i++ {
-			images[i] = fetchResourceForSpec(spec, c, "sunset.jpg", strconv.Itoa(i)).(resource.Image)
+			imgs[i] = fetchResourceForSpec(spec, c, "sunset.jpg", strconv.Itoa(i)).(images.ImageResource)
 		}
-		return images
+		return imgs
 	}
 
-	getAndCheckExif := func(c *qt.C, image resource.Image) {
+	getAndCheckExif := func(c *qt.C, image images.ImageResource) {
 		x := image.Exif()
 		c.Assert(x, qt.Not(qt.IsNil))
 		c.Assert(x.Long, qt.Equals, float64(-4.50846))
diff --git a/resources/images/exif/exif.go b/resources/images/exif/exif.go
index 2841bd153..487f250d5 100644
--- a/resources/images/exif/exif.go
+++ b/resources/images/exif/exif.go
@@ -32,10 +32,18 @@ import (
 
 const exifTimeLayout = "2006:01:02 15:04:05"
 
-type Exif struct {
-	Lat  float64
+// ExifInfo holds the decoded Exif data for an Image.
+type ExifInfo struct {
+	// GPS latitude in degrees.
+	Lat float64
+
+	// GPS longitude in degrees.
 	Long float64
+
+	// Image creation date/time.
 	Date time.Time
+
+	// A collection of the available Exif tags for this Image.
 	Tags Tags
 }
 
@@ -106,7 +114,7 @@ func NewDecoder(options ...func(*Decoder) error) (*Decoder, error) {
 	return d, nil
 }
 
-func (d *Decoder) Decode(r io.Reader) (ex *Exif, err error) {
+func (d *Decoder) Decode(r io.Reader) (ex *ExifInfo, err error) {
 	defer func() {
 		if r := recover(); r != nil {
 			err = fmt.Errorf("Exif failed: %v", r)
@@ -139,7 +147,7 @@ func (d *Decoder) Decode(r io.Reader) (ex *Exif, err error) {
 		return
 	}
 
-	ex = &Exif{Lat: lat, Long: long, Date: tm, Tags: walker.vals}
+	ex = &ExifInfo{Lat: lat, Long: long, Date: tm, Tags: walker.vals}
 
 	return
 }
diff --git a/resources/images/exif/exif_test.go b/resources/images/exif/exif_test.go
index 0cb9f6704..cd5961404 100644
--- a/resources/images/exif/exif_test.go
+++ b/resources/images/exif/exif_test.go
@@ -56,7 +56,7 @@ func TestExif(t *testing.T) {
 	// Verify that it survives a round-trip to JSON and back.
 	data, err := json.Marshal(x)
 	c.Assert(err, qt.IsNil)
-	x2 := &Exif{}
+	x2 := &ExifInfo{}
 	err = json.Unmarshal(data, x2)
 
 	c.Assert(x2, eq, x)
diff --git a/resources/images/image.go b/resources/images/image.go
index 25deda925..e8cca7769 100644
--- a/resources/images/image.go
+++ b/resources/images/image.go
@@ -192,7 +192,7 @@ type ImageProcessor struct {
 	exifDecoder *exif.Decoder
 }
 
-func (p *ImageProcessor) DecodeExif(r io.Reader) (*exif.Exif, error) {
+func (p *ImageProcessor) DecodeExif(r io.Reader) (*exif.ExifInfo, error) {
 	return p.exifDecoder.Decode(r)
 }
 
diff --git a/resources/images/image_resource.go b/resources/images/image_resource.go
new file mode 100644
index 000000000..e0fec15a0
--- /dev/null
+++ b/resources/images/image_resource.go
@@ -0,0 +1,53 @@
+// Copyright 2022 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package images
+
+import (
+	"image"
+
+	"github.com/gohugoio/hugo/resources/images/exif"
+	"github.com/gohugoio/hugo/resources/resource"
+)
+
+// ImageResource represents an image resource.
+type ImageResource interface {
+	resource.Resource
+	ImageResourceOps
+}
+
+type ImageResourceOps interface {
+	// Height returns the height of the Image.
+	Height() int
+	// Width returns the width of the Image.
+	Width() int
+
+	// Crop an image to match the given dimensions without resizing.
+	// You must provide both width and height.
+	// Use the anchor option to change the crop box anchor point.
+	//    {{ $image := $image.Crop "600x400" }}
+	Crop(spec string) (ImageResource, error)
+	Fill(spec string) (ImageResource, error)
+	Fit(spec string) (ImageResource, error)
+	Resize(spec string) (ImageResource, error)
+
+	// Filter applies one or more filters to an Image.
+	//    {{ $image := $image.Filter (images.GaussianBlur 6) (images.Pixelate 8) }}
+	Filter(filters ...any) (ImageResource, error)
+
+	// Exif returns an ExifInfo object containing Image metadata.
+	Exif() *exif.ExifInfo
+
+	// Internal
+	DecodeImage() (image.Image, error)
+}
diff --git a/resources/page/page.go b/resources/page/page.go
index 5ddacc8a6..50459c465 100644
--- a/resources/page/page.go
+++ b/resources/page/page.go
@@ -161,8 +161,7 @@ type PageMetaProvider interface {
 	// Aliases forms the base for redirects generation.
 	Aliases() []string
 
-	// BundleType returns the bundle type: "leaf", "branch" or an empty string if it is none.
-	// See https://gohugo.io/content-management/page-bundles/
+	// BundleType returns the bundle type: `leaf`, `branch` or an empty string.
 	BundleType() files.ContentClass
 
 	// A configured description.
diff --git a/resources/page/pagegroup.go b/resources/page/pagegroup.go
index 1d9827907..3b32a1fae 100644
--- a/resources/page/pagegroup.go
+++ b/resources/page/pagegroup.go
@@ -40,7 +40,10 @@ var (
 // PageGroup represents a group of pages, grouped by the key.
 // The key is typically a year or similar.
 type PageGroup struct {
+	// The key, typically a year or similar.
 	Key any
+
+	// The Pages in this group.
 	Pages
 }
 
@@ -361,6 +364,7 @@ func (p Pages) GroupByParamDate(key string, format string, order ...string) (Pag
 }
 
 // ProbablyEq wraps compare.ProbablyEqer
+// For internal use.
 func (p PageGroup) ProbablyEq(other any) bool {
 	otherP, ok := other.(PageGroup)
 	if !ok {
@@ -374,7 +378,7 @@ func (p PageGroup) ProbablyEq(other any) bool {
 	return p.Pages.ProbablyEq(otherP.Pages)
 }
 
-// Slice is not meant to be used externally. It's a bridge function
+// Slice is for internal use.
 // for the template functions. See collections.Slice.
 func (p PageGroup) Slice(in any) (any, error) {
 	switch items := in.(type) {
diff --git a/resources/page/pages.go b/resources/page/pages.go
index 4db6a4f68..f47af5114 100644
--- a/resources/page/pages.go
+++ b/resources/page/pages.go
@@ -22,9 +22,11 @@ import (
 	"github.com/gohugoio/hugo/resources/resource"
 )
 
-// Pages is a slice of pages. This is the most common list type in Hugo.
+// Pages is a slice of Page objects. This is the most common list type in Hugo.
 type Pages []Page
 
+// String returns a string representation of the list.
+// For internal use.
 func (ps Pages) String() string {
 	return fmt.Sprintf("Pages(%d)", len(ps))
 }
@@ -37,7 +39,8 @@ func (ps Pages) shuffle() {
 	}
 }
 
-// ToResources wraps resource.ResourcesConverter
+// ToResources wraps resource.ResourcesConverter.
+// For internal use.
 func (pages Pages) ToResources() resource.Resources {
 	r := make(resource.Resources, len(pages))
 	for i, p := range pages {
@@ -86,10 +89,12 @@ func ToPages(seq any) (Pages, error) {
 	return nil, fmt.Errorf("cannot convert type %T to Pages", seq)
 }
 
+// Group groups the pages in in by key.
+// This implements collections.Grouper.
 func (p Pages) Group(key any, in any) (any, error) {
 	pages, err := ToPages(in)
 	if err != nil {
-		return nil, err
+		return PageGroup{}, err
 	}
 	return PageGroup{Key: key, Pages: pages}, nil
 }
@@ -100,6 +105,7 @@ func (p Pages) Len() int {
 }
 
 // ProbablyEq wraps compare.ProbablyEqer
+// For internal use.
 func (pages Pages) ProbablyEq(other any) bool {
 	otherPages, ok := other.(Pages)
 	if !ok {
diff --git a/resources/page/site.go b/resources/page/site.go
index b84f17914..f5806280c 100644
--- a/resources/page/site.go
+++ b/resources/page/site.go
@@ -29,21 +29,52 @@ import (
 // Site represents a site in the build. This is currently a very narrow interface,
 // but the actual implementation will be richer, see hugolib.SiteInfo.
 type Site interface {
+	// Returns the Language configured for this Site.
 	Language() *langs.Language
+
+	// Returns all the regular Pages in this Site.
 	RegularPages() Pages
+
+	// Returns all Pages in this Site.
 	Pages() Pages
+
+	// A shortcut to the home page.
 	Home() Page
+
+	// Returns true if we're running in a server.
 	IsServer() bool
+
+	// Returns the server port.
 	ServerPort() int
+
+	// Returns the configured title for this Site.
 	Title() string
+
+	// Returns all Sites for all languages.
 	Sites() Sites
+
+	// Returns Site currently rendering.
 	Current() Site
+
+	// Returns a struct with some information about the build.
 	Hugo() hugo.Info
+
+	// Returns the BaseURL for this Site.
 	BaseURL() template.URL
+
+	// Retuns a taxonomy map.
 	Taxonomies() any
+
+	// Returns the last modification date of the content.
 	LastChange() time.Time
+
+	// Returns the Menus for this site.
 	Menus() navigation.Menus
+
+	// Returns the Params configured for this site.
 	Params() maps.Params
+
+	// Returns a map of all the data inside /data.
 	Data() map[string]any
 }
 
diff --git a/resources/page/weighted.go b/resources/page/weighted.go
index 5ae2636d4..39034d26c 100644
--- a/resources/page/weighted.go
+++ b/resources/page/weighted.go
@@ -63,7 +63,7 @@ func (w WeightedPage) String() string {
 	return fmt.Sprintf("WeightedPage(%d,%q)", w.Weight, w.Page.Title())
 }
 
-// Slice is not meant to be used externally. It's a bridge function
+// Slice is for internal use.
 // for the template functions. See collections.Slice.
 func (p WeightedPage) Slice(in any) (any, error) {
 	switch items := in.(type) {
diff --git a/resources/resource.go b/resources/resource.go
index 77cc11dde..01f20f09d 100644
--- a/resources/resource.go
+++ b/resources/resource.go
@@ -161,7 +161,7 @@ type baseResource interface {
 type commonResource struct {
 }
 
-// Slice is not meant to be used externally. It's a bridge function
+// Slice is for internal use.
 // for the template functions. See collections.Slice.
 func (commonResource) Slice(in any) (any, error) {
 	switch items := in.(type) {
diff --git a/resources/resource/dates.go b/resources/resource/dates.go
index f26c44787..b43f35c64 100644
--- a/resources/resource/dates.go
+++ b/resources/resource/dates.go
@@ -20,9 +20,16 @@ var _ Dated = Dates{}
 // Dated wraps a "dated resource". These are the 4 dates that makes
 // the date logic in Hugo.
 type Dated interface {
+	// Date returns the date of the resource.
 	Date() time.Time
+
+	// Lastmod returns the last modification date of the resource.
 	Lastmod() time.Time
+
+	// PublishDate returns the publish date of the resource.
 	PublishDate() time.Time
+
+	// ExpiryDate returns the expiration date of the resource.
 	ExpiryDate() time.Time
 }
 
diff --git a/resources/resource/resourcetypes.go b/resources/resource/resourcetypes.go
index a4f820188..e3251aabe 100644
--- a/resources/resource/resourcetypes.go
+++ b/resources/resource/resourcetypes.go
@@ -14,12 +14,9 @@
 package resource
 
 import (
-	"image"
-
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/langs"
 	"github.com/gohugoio/hugo/media"
-	"github.com/gohugoio/hugo/resources/images/exif"
 
 	"github.com/gohugoio/hugo/common/hugio"
 )
@@ -82,26 +79,6 @@ type Resource interface {
 	ErrProvider
 }
 
-// Image represents an image resource.
-type Image interface {
-	Resource
-	ImageOps
-}
-
-type ImageOps interface {
-	Height() int
-	Width() int
-	Crop(spec string) (Image, error)
-	Fill(spec string) (Image, error)
-	Fit(spec string) (Image, error)
-	Resize(spec string) (Image, error)
-	Filter(filters ...any) (Image, error)
-	Exif() *exif.Exif
-
-	// Internal
-	DecodeImage() (image.Image, error)
-}
-
 type ResourceTypeProvider interface {
 	// ResourceType is the resource type. For most file types, this is the main
 	// part of the MIME type, e.g. "image", "application", "text" etc.
diff --git a/resources/testhelpers_test.go b/resources/testhelpers_test.go
index 1f7e5f93c..3a4e7e580 100644
--- a/resources/testhelpers_test.go
+++ b/resources/testhelpers_test.go
@@ -20,6 +20,7 @@ import (
 	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/media"
 	"github.com/gohugoio/hugo/output"
+	"github.com/gohugoio/hugo/resources/images"
 	"github.com/gohugoio/hugo/resources/page"
 	"github.com/gohugoio/hugo/resources/resource"
 	"github.com/spf13/afero"
@@ -131,19 +132,19 @@ func newTestResourceOsFs(c *qt.C) (*Spec, string) {
 	return spec, workDir
 }
 
-func fetchSunset(c *qt.C) resource.Image {
+func fetchSunset(c *qt.C) images.ImageResource {
 	return fetchImage(c, "sunset.jpg")
 }
 
-func fetchImage(c *qt.C, name string) resource.Image {
+func fetchImage(c *qt.C, name string) images.ImageResource {
 	spec := newTestResourceSpec(specDescriptor{c: c})
 	return fetchImageForSpec(spec, c, name)
 }
 
-func fetchImageForSpec(spec *Spec, c *qt.C, name string) resource.Image {
+func fetchImageForSpec(spec *Spec, c *qt.C, name string) images.ImageResource {
 	r := fetchResourceForSpec(spec, c, name)
 
-	img := r.(resource.Image)
+	img := r.(images.ImageResource)
 
 	c.Assert(img, qt.Not(qt.IsNil))
 	c.Assert(img.(specProvider).getSpec(), qt.Not(qt.IsNil))
diff --git a/resources/transform.go b/resources/transform.go
index 9b69ee37a..e269b7b10 100644
--- a/resources/transform.go
+++ b/resources/transform.go
@@ -26,6 +26,7 @@ import (
 
 	"github.com/pkg/errors"
 
+	"github.com/gohugoio/hugo/resources/images"
 	"github.com/gohugoio/hugo/resources/images/exif"
 	"github.com/spf13/afero"
 
@@ -176,19 +177,19 @@ func (r *resourceAdapter) Data() any {
 	return r.target.Data()
 }
 
-func (r *resourceAdapter) Crop(spec string) (resource.Image, error) {
+func (r *resourceAdapter) Crop(spec string) (images.ImageResource, error) {
 	return r.getImageOps().Crop(spec)
 }
 
-func (r *resourceAdapter) Fill(spec string) (resource.Image, error) {
+func (r *resourceAdapter) Fill(spec string) (images.ImageResource, error) {
 	return r.getImageOps().Fill(spec)
 }
 
-func (r *resourceAdapter) Fit(spec string) (resource.Image, error) {
+func (r *resourceAdapter) Fit(spec string) (images.ImageResource, error) {
 	return r.getImageOps().Fit(spec)
 }
 
-func (r *resourceAdapter) Filter(filters ...any) (resource.Image, error) {
+func (r *resourceAdapter) Filter(filters ...any) (images.ImageResource, error) {
 	return r.getImageOps().Filter(filters...)
 }
 
@@ -196,7 +197,7 @@ func (r *resourceAdapter) Height() int {
 	return r.getImageOps().Height()
 }
 
-func (r *resourceAdapter) Exif() *exif.Exif {
+func (r *resourceAdapter) Exif() *exif.ExifInfo {
 	return r.getImageOps().Exif()