Update modules.txt

cbconvert.go

@@ -15,6 +15,7 @@ import (
 
 	pngstructure "github.com/dsoprea/go-png-image-structure"
 	"github.com/dustin/go-humanize"
+	"github.com/gen2brain/go-fitz"
 )
 
 // Options type.
@@ -41,7 +42,7 @@ type Options struct {
 	Fit bool
 	// Do not upscale images already smaller than the requested width/height
 	NoUpscale bool
-	// Document rendering resolution in DPI (PDF, EPUB, etc.); 0 uses the default
+	// Document rendering resolution in DPI (PDF, EPUB, etc.); 0 uses the page's native resolution
 	DPI int
 	// 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 5=Gaussian, 6=Lanczos
 	Filter int
@@ -101,6 +102,8 @@ type Converter struct {
 	prefix string
 	// Input root for the current file, used to build recursive output paths
 	root string
+	// Target size for fast previews; when set, JPEG covers are IDCT-downscaled while decoding
+	previewWidth, previewHeight int
 	// Number of files
 	Nfiles int
 	// Index of the current file
@@ -209,13 +212,14 @@ func (o Options) Args() []string {
 	return args
 }
 
-// renderDPI returns the document rendering resolution, falling back to 300 when unset.
+// renderPage renders document page n at the configured DPI, or at the page's
-func (c *Converter) renderDPI() float64 {
+// native resolution when DPI is unset.
+func (c *Converter) renderPage(doc *fitz.Document, n int) (*image.RGBA, error) {
 	if c.Opts.DPI > 0 {
-		return float64(c.Opts.DPI)
+		return doc.ImageDPI(n, float64(c.Opts.DPI))
 	}
 
-	return 300
+	return doc.Image(n)
 }
 
 // Cancel cancels the operation.
@@ -552,6 +556,27 @@ func (c *Converter) Preview(fileName string, fileInfo os.FileInfo, width, height
 	return c.previewImage(fileName, i, width, height)
 }
 
+// CoverPreview returns the cover fitted into width x height, skipping the output-codec round-trip.
+func (c *Converter) CoverPreview(fileName string, fileInfo os.FileInfo, width, height int) (Image, error) {
+	c.previewWidth, c.previewHeight = width, height
+
+	i, err := c.coverImage(fileName, fileInfo)
+	if err != nil {
+		return Image{}, fmt.Errorf("%s: %w", fileName, err)
+	}
+
+	if width != 0 && height != 0 {
+		i = fit(i, width, height, resampleFilter(c.Opts.Filter))
+	}
+
+	var img Image
+	img.Image = i
+	img.Width = i.Bounds().Dx()
+	img.Height = i.Bounds().Dy()
+
+	return img, nil
+}
+
 // PreviewPage returns the page-th image (0-based) as an image preview.
 func (c *Converter) PreviewPage(fileName string, fileInfo os.FileInfo, page, width, height int) (Image, error) {
 	i, err := c.pageImage(fileName, fileInfo, page)

cbconvert_convert.go

@@ -1,6 +1,7 @@
 package cbconvert
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"fmt"
@@ -16,6 +17,7 @@ import (
 	"github.com/gen2brain/avif"
 	"github.com/gen2brain/go-fitz"
 	"github.com/gen2brain/jpegli"
+	"github.com/gen2brain/jpegn"
 	"github.com/gen2brain/jpegxl"
 	"github.com/gen2brain/webp"
 	"github.com/jsummers/gobmp"
@@ -48,7 +50,7 @@ func (c *Converter) convertDocument(ctx context.Context, fileName string) error
 			return fmt.Errorf("convertDocument: %w", ctx.Err())
 		}
 
-		img, err := doc.ImageDPI(n, c.renderDPI())
+		img, err := c.renderPage(doc, n)
 		if err != nil {
 			return fmt.Errorf("convertDocument: %w", err)
 		}
@@ -356,8 +358,42 @@ func (c *Converter) imageTransform(img image.Image) image.Image {
 }
 
 // imageDecode decodes image from reader.
+// jpegnOptions decodes straight to RGBA with high-quality chroma upsampling.
+var jpegnOptions = jpegn.Options{ToRGBA: true, UpsampleMethod: jpegn.CatmullRom}
+
 func (c *Converter) imageDecode(reader io.Reader) (image.Image, error) {
-	img, _, err := image.Decode(reader)
+	br := bufio.NewReader(reader)
+
+	if magic, err := br.Peek(2); err == nil && magic[0] == 0xff && magic[1] == 0xd8 {
+		opts := jpegnOptions
+
+		if c.previewWidth > 0 && c.previewHeight > 0 {
+			data, err := io.ReadAll(br)
+			if err != nil {
+				return nil, fmt.Errorf("imageDecode: %w", err)
+			}
+
+			if cfg, err := jpegn.DecodeConfig(bytes.NewReader(data)); err == nil {
+				opts.ScaleDenom = scaleDenom(cfg.Width, cfg.Height, c.previewWidth, c.previewHeight)
+			}
+
+			img, err := jpegn.Decode(bytes.NewReader(data), &opts)
+			if err != nil {
+				return nil, fmt.Errorf("imageDecode: %w", err)
+			}
+
+			return img, nil
+		}
+
+		img, err := jpegn.Decode(br, &opts)
+		if err != nil {
+			return nil, fmt.Errorf("imageDecode: %w", err)
+		}
+
+		return img, nil
+	}
+
+	img, _, err := image.Decode(br)
 	if err != nil {
 		return img, fmt.Errorf("imageDecode: %w", err)
 	}
@@ -365,6 +401,17 @@ func (c *Converter) imageDecode(reader io.Reader) (image.Image, error) {
 	return img, nil
 }
 
+// scaleDenom returns the largest JPEG IDCT denominator (1, 2, 4, 8) that keeps w x h at or above tw x th.
+func scaleDenom(w, h, tw, th int) int {
+	for _, d := range []int{8, 4, 2} {
+		if w/d >= tw && h/d >= th {
+			return d
+		}
+	}
+
+	return 1
+}
+
 // imageEncode encodes image to file.
 func (c *Converter) imageEncode(img image.Image, w io.Writer) error {
 	var err error

cbconvert_cover.go

@@ -52,7 +52,7 @@ func (c *Converter) coverDocument(fileName string) (image.Image, error) {
 	}
 	defer doc.Close()
 
-	img, err := doc.ImageDPI(0, c.renderDPI())
+	img, err := c.renderPage(doc, 0)
 	if err != nil {
 		return nil, fmt.Errorf("coverDocument: %w", err)
 	}
@@ -124,7 +124,7 @@ func (c *Converter) pageDocument(fileName string, page int) (image.Image, error)
 		return nil, fmt.Errorf("pageDocument: page %d out of range (%d pages)", page+1, doc.NumPage())
 	}
 
-	img, err := doc.ImageDPI(page, c.renderDPI())
+	img, err := c.renderPage(doc, page)
 	if err != nil {
 		return nil, fmt.Errorf("pageDocument: %w", err)
 	}

cmd/cbconvert-gui/dialogs.go

@@ -70,10 +70,37 @@ func fileDlg(title string, multiple, directory bool, dirKey string) ([]string, e
 
 const dlgPreviewName = "_FILEDLGPREVIEW_"
 
+// previewPad insets the cover from the preview pane edges, in pixels per side.
+const previewPad = 8
+
 // previewCover returns a FILE_CB handler that draws the highlighted comic's cover in the dialog preview pane.
+// Extracted covers are cached by path so re-highlighting a file doesn't re-extract it.
 func previewCover() iup.FileFunc {
-	var image iup.Ihandle
+	const maxCache = 32
-	var lastFile string
+
+	cache := make(map[string]iup.Ihandle)
+	order := make([]string, 0, maxCache)
+
+	cover := func(path string, w, h int) iup.Ihandle {
+		if img, ok := cache[path]; ok {
+			return img
+		}
+
+		img := loadCover(path, w, h)
+		cache[path] = img
+		order = append(order, path)
+
+		if len(order) > maxCache {
+			old := order[0]
+			order = order[1:]
+			if oi := cache[old]; oi != 0 {
+				oi.Destroy()
+			}
+			delete(cache, old)
+		}
+
+		return img
+	}
 
 	return func(ih iup.Ihandle, filename, status string) int {
 		switch status {
@@ -82,19 +109,8 @@ func previewCover() iup.FileFunc {
 			cw, ch := iup.DrawGetSize(ih)
 			iup.DrawParentBackground(ih)
 
-			if filename != lastFile {
+			if image := cover(filename, cw-2*previewPad, ch-2*previewPad); image != 0 {
-				lastFile = filename
-				if image != 0 {
-					image.Destroy()
-					image = 0
-				}
-				if img := loadCover(filename, cw, ch); img != 0 {
-					image = img
 				iup.SetHandle(dlgPreviewName, image)
-				}
-			}
-
-			if image != 0 {
 				iw, iih, _ := iup.DrawGetImageInfo(dlgPreviewName)
 				iup.DrawImage(ih, dlgPreviewName, (cw-iw)/2, (ch-iih)/2, iw, iih)
 			} else {
@@ -106,11 +122,13 @@ func previewCover() iup.FileFunc {
 
 			iup.DrawEnd(ih)
 		case "FINISH":
-			if image != 0 {
+			for _, img := range cache {
-				image.Destroy()
+				if img != 0 {
-				image = 0
+					img.Destroy()
 				}
-			lastFile = ""
+			}
+			cache = make(map[string]iup.Ihandle)
+			order = order[:0]
 		}
 
 		return iup.DEFAULT
@@ -131,7 +149,7 @@ func loadCover(path string, w, h int) iup.Ihandle {
 	opts := cbconvert.NewOptions()
 	opts.DPI = 96
 
-	img, err := cbconvert.New(opts).Preview(path, fi, w, h)
+	img, err := cbconvert.New(opts).CoverPreview(path, fi, w, h)
 	if err != nil || img.Image == nil {
 		return 0
 	}

cmd/cbconvert-gui/dist/linux/io.github.gen2brain.cbconvert.metainfo.xml

@@ -38,6 +38,23 @@
   <content_rating type="oars-1.1"/>
 
   <releases>
+    <release version="1.2.0" date="2026-06-27" type="stable">
+      <description>
+        <ul>
+          <li>Support for RAR5</li>
+          <li>Lossless compression for WebP, AVIF, and JXL</li>
+          <li>Control over encoder effort and speed</li>
+          <li>Combine multiple comics into a single file</li>
+          <li>Save and switch between settings profiles</li>
+          <li>Multi-language interface</li>
+          <li>Choose the document rendering resolution (DPI)</li>
+          <li>Option to skip upscaling of smaller images</li>
+          <li>Refreshed interface with page-by-page preview and cover thumbnails in the file picker</li>
+          <li>Various fixes and smaller improvements</li>
+        </ul>
+      </description>
+      <url type="details">https://github.com/gen2brain/cbconvert/releases/tag/v1.2.0</url>
+    </release>
     <release version="1.1.0" date="2024-11-06" type="stable">
       <description>
         <ul>

cmd/cbconvert-gui/dist/linux/modules.txt

@@ -1,11 +1,50 @@
-# github.com/anthonynsimon/bild v0.14.0
+# github.com/STARRY-S/zip v0.2.3
-## explicit; go 1.21
+## explicit; go 1.23
+github.com/STARRY-S/zip
+# github.com/andybalholm/brotli v1.2.1
+## explicit; go 1.22
+github.com/andybalholm/brotli
+github.com/andybalholm/brotli/flate
+github.com/andybalholm/brotli/matchfinder
+# github.com/anthonynsimon/bild v0.15.0
+## explicit; go 1.26
 github.com/anthonynsimon/bild/adjust
 github.com/anthonynsimon/bild/clone
 github.com/anthonynsimon/bild/math/f64
 github.com/anthonynsimon/bild/parallel
 github.com/anthonynsimon/bild/transform
 github.com/anthonynsimon/bild/util
+# github.com/bodgit/plumbing v1.3.0
+## explicit; go 1.13
+github.com/bodgit/plumbing
+# github.com/bodgit/sevenzip v1.6.4
+## explicit; go 1.25.0
+github.com/bodgit/sevenzip
+github.com/bodgit/sevenzip/internal/aes7z
+github.com/bodgit/sevenzip/internal/bcj2
+github.com/bodgit/sevenzip/internal/bra
+github.com/bodgit/sevenzip/internal/brotli
+github.com/bodgit/sevenzip/internal/bzip2
+github.com/bodgit/sevenzip/internal/deflate
+github.com/bodgit/sevenzip/internal/delta
+github.com/bodgit/sevenzip/internal/lz4
+github.com/bodgit/sevenzip/internal/lzma
+github.com/bodgit/sevenzip/internal/lzma2
+github.com/bodgit/sevenzip/internal/pool
+github.com/bodgit/sevenzip/internal/ppmd
+github.com/bodgit/sevenzip/internal/util
+github.com/bodgit/sevenzip/internal/zstd
+# github.com/bodgit/windows v1.0.1
+## explicit; go 1.13
+github.com/bodgit/windows
+# github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707
+## explicit; go 1.9
+github.com/dsnet/compress
+github.com/dsnet/compress/bzip2
+github.com/dsnet/compress/bzip2/internal/sais
+github.com/dsnet/compress/internal
+github.com/dsnet/compress/internal/errors
+github.com/dsnet/compress/internal/prefix
 # github.com/dsoprea/go-exif/v2 v2.0.0-20230826092837-6579e82b732d
 ## explicit; go 1.13
 github.com/dsoprea/go-exif/v2
@@ -23,88 +62,140 @@ github.com/dsoprea/go-utility/image
 # github.com/dustin/go-humanize v1.0.1
 ## explicit; go 1.16
 github.com/dustin/go-humanize
-# github.com/ebitengine/purego v0.8.1
+# github.com/ebitengine/purego v0.10.1
 ## explicit; go 1.18
 github.com/ebitengine/purego
 github.com/ebitengine/purego/internal/cgo
 github.com/ebitengine/purego/internal/fakecgo
 github.com/ebitengine/purego/internal/strings
+github.com/ebitengine/purego/internal/xreflect
 # github.com/fvbommel/sortorder v1.1.0
 ## explicit; go 1.13
 github.com/fvbommel/sortorder
-# github.com/gen2brain/avif v0.4.1
+# github.com/gen2brain/avif v0.5.1
-## explicit; go 1.21
+## explicit; go 1.25.0
 github.com/gen2brain/avif
-# github.com/gen2brain/cbconvert v1.0.5-0.20241106181414-0dee611bf1de
+# github.com/gen2brain/cbconvert v1.2.0
-## explicit; go 1.23
+## explicit; go 1.26
 github.com/gen2brain/cbconvert
-# github.com/gen2brain/go-fitz v1.24.14
+# github.com/gen2brain/go-fitz v1.28.1
-## explicit; go 1.22
+## explicit; go 1.24.0
 github.com/gen2brain/go-fitz
 github.com/gen2brain/go-fitz/include/mupdf
 github.com/gen2brain/go-fitz/include/mupdf/fitz
 github.com/gen2brain/go-fitz/libs
-# github.com/gen2brain/go-unarr v0.2.4
+# github.com/gen2brain/iup-go/iup v0.32.1-0.20260627135200-7df674d35173
 ## explicit; go 1.21
-github.com/gen2brain/go-unarr
-github.com/gen2brain/go-unarr/unarrc
-github.com/gen2brain/go-unarr/unarrc/external
-github.com/gen2brain/go-unarr/unarrc/external/bzip2
-github.com/gen2brain/go-unarr/unarrc/external/unarr
-github.com/gen2brain/go-unarr/unarrc/external/unarr/_7z
-github.com/gen2brain/go-unarr/unarrc/external/unarr/common
-github.com/gen2brain/go-unarr/unarrc/external/unarr/lzmasdk
-github.com/gen2brain/go-unarr/unarrc/external/unarr/rar
-github.com/gen2brain/go-unarr/unarrc/external/unarr/tar
-github.com/gen2brain/go-unarr/unarrc/external/unarr/zip
-github.com/gen2brain/go-unarr/unarrc/external/zlib
-# github.com/gen2brain/iup-go/iup v0.0.0-20241106050025-0f971ac33ed4
-## explicit; go 1.22
 github.com/gen2brain/iup-go/iup
 github.com/gen2brain/iup-go/iup/external
 github.com/gen2brain/iup-go/iup/external/include
 github.com/gen2brain/iup-go/iup/external/src
+github.com/gen2brain/iup-go/iup/external/src/android
 github.com/gen2brain/iup-go/iup/external/src/cocoa
+github.com/gen2brain/iup-go/iup/external/src/cocoatouch
+github.com/gen2brain/iup-go/iup/external/src/efl
 github.com/gen2brain/iup-go/iup/external/src/gtk
+github.com/gen2brain/iup-go/iup/external/src/gtk4
+github.com/gen2brain/iup-go/iup/external/src/haiku
 github.com/gen2brain/iup-go/iup/external/src/mot
+github.com/gen2brain/iup-go/iup/external/src/qt
 github.com/gen2brain/iup-go/iup/external/src/win
 github.com/gen2brain/iup-go/iup/external/src/win/wdl
 github.com/gen2brain/iup-go/iup/external/src/win/wdl/dummy
+github.com/gen2brain/iup-go/iup/external/src/winui
+github.com/gen2brain/iup-go/iup/external/src/winui/winrt
+github.com/gen2brain/iup-go/iup/external/src/winui/winrt/impl
+github.com/gen2brain/iup-go/iup/external/srcctrl
+github.com/gen2brain/iup-go/iup/external/srcctrl/matrix
+github.com/gen2brain/iup-go/iup/external/srcctrl/matrixex
 github.com/gen2brain/iup-go/iup/external/srcgl
+github.com/gen2brain/iup-go/iup/external/srcplot
+github.com/gen2brain/iup-go/iup/external/srcweb
 github.com/gen2brain/iup-go/iup/manifest
-# github.com/gen2brain/jpegli v0.3.3
+# github.com/gen2brain/jpegli v0.4.1
-## explicit; go 1.22
+## explicit; go 1.25.0
 github.com/gen2brain/jpegli
-# github.com/gen2brain/jpegxl v0.4.2
+# github.com/gen2brain/jpegn v0.4.2
-## explicit; go 1.22
+## explicit; go 1.23.0
+github.com/gen2brain/jpegn
+# github.com/gen2brain/jpegxl v0.5.2
+## explicit; go 1.25.0
 github.com/gen2brain/jpegxl
-# github.com/gen2brain/webp v0.5.1
+# github.com/gen2brain/webp v0.6.1
-## explicit; go 1.22
+## explicit; go 1.23
 github.com/gen2brain/webp
 # github.com/go-errors/errors v1.5.1
 ## explicit; go 1.14
 github.com/go-errors/errors
-# github.com/godbus/dbus/v5 v5.1.0
+# github.com/golang/geo v0.0.0-20260625163123-7c0e84413537
-## explicit; go 1.12
+## explicit; go 1.23.0
-github.com/godbus/dbus/v5
-# github.com/golang/geo v0.0.0-20230421003525-6adc56603217
-## explicit; go 1.18
 github.com/golang/geo/r1
 github.com/golang/geo/r2
 github.com/golang/geo/r3
 github.com/golang/geo/s1
 github.com/golang/geo/s2
-# github.com/google/uuid v1.6.0
+# github.com/hashicorp/golang-lru/v2 v2.0.7
-## explicit
+## explicit; go 1.18
-github.com/google/uuid
+github.com/hashicorp/golang-lru/v2
+github.com/hashicorp/golang-lru/v2/internal
+github.com/hashicorp/golang-lru/v2/simplelru
 # github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25
 ## explicit
 github.com/jsummers/gobmp
-# github.com/jupiterrider/ffi v0.2.1
+# github.com/klauspost/compress v1.18.6
-## explicit; go 1.18
+## explicit; go 1.24
-github.com/jupiterrider/ffi
+github.com/klauspost/compress
-# github.com/tetratelabs/wazero v1.8.1
+github.com/klauspost/compress/flate
+github.com/klauspost/compress/fse
+github.com/klauspost/compress/gzip
+github.com/klauspost/compress/huff0
+github.com/klauspost/compress/internal/cpuinfo
+github.com/klauspost/compress/internal/godebug
+github.com/klauspost/compress/internal/le
+github.com/klauspost/compress/internal/race
+github.com/klauspost/compress/internal/snapref
+github.com/klauspost/compress/s2
+github.com/klauspost/compress/zip
+github.com/klauspost/compress/zlib
+github.com/klauspost/compress/zstd
+github.com/klauspost/compress/zstd/internal/xxhash
+# github.com/klauspost/pgzip v1.2.6
+## explicit
+github.com/klauspost/pgzip
+# github.com/mholt/archives v0.1.5
+## explicit; go 1.24.0
+github.com/mholt/archives
+# github.com/mikelolasagasti/xz v1.0.1
+## explicit; go 1.15
+github.com/mikelolasagasti/xz
+# github.com/minio/minlz v1.1.1
 ## explicit; go 1.21
+github.com/minio/minlz
+github.com/minio/minlz/internal/race
+# github.com/nwaples/rardecode/v2 v2.2.5
+## explicit; go 1.21
+github.com/nwaples/rardecode/v2
+# github.com/pierrec/lz4/v4 v4.1.27
+## explicit; go 1.17
+github.com/pierrec/lz4/v4
+github.com/pierrec/lz4/v4/internal/lz4block
+github.com/pierrec/lz4/v4/internal/lz4errors
+github.com/pierrec/lz4/v4/internal/lz4stream
+github.com/pierrec/lz4/v4/internal/xxh32
+# github.com/sorairolake/lzip-go v0.3.8
+## explicit; go 1.22
+github.com/sorairolake/lzip-go
+# github.com/spf13/afero v1.15.0
+## explicit; go 1.23.0
+github.com/spf13/afero
+github.com/spf13/afero/internal/common
+github.com/spf13/afero/mem
+# github.com/stangelandcl/ppmd v0.1.1
+## explicit; go 1.17
+github.com/stangelandcl/ppmd
+github.com/stangelandcl/ppmd/internal/h7z
+# github.com/tetratelabs/wazero v1.12.0
+## explicit; go 1.25.0
 github.com/tetratelabs/wazero
 github.com/tetratelabs/wazero/api
 github.com/tetratelabs/wazero/experimental
@@ -122,7 +213,6 @@ github.com/tetratelabs/wazero/internal/engine/wazevo/ssa
 github.com/tetratelabs/wazero/internal/engine/wazevo/wazevoapi
 github.com/tetratelabs/wazero/internal/expctxkeys
 github.com/tetratelabs/wazero/internal/filecache
-github.com/tetratelabs/wazero/internal/fsapi
 github.com/tetratelabs/wazero/internal/ieee754
 github.com/tetratelabs/wazero/internal/internalapi
 github.com/tetratelabs/wazero/internal/leb128
@@ -140,17 +230,42 @@ github.com/tetratelabs/wazero/internal/wasm/binary
 github.com/tetratelabs/wazero/internal/wasmdebug
 github.com/tetratelabs/wazero/internal/wasmruntime
 github.com/tetratelabs/wazero/sys
-# golang.org/x/image v0.21.0
+# github.com/ulikunitz/xz v0.5.15
-## explicit; go 1.18
+## explicit; go 1.12
+github.com/ulikunitz/xz
+github.com/ulikunitz/xz/internal/hash
+github.com/ulikunitz/xz/internal/xlog
+github.com/ulikunitz/xz/lzma
+# go4.org v0.0.0-20260112195520-a5071408f32f
+## explicit; go 1.24.0
+go4.org/readerutil
+# golang.org/x/image v0.43.0
+## explicit; go 1.25.0
 golang.org/x/image/ccitt
+golang.org/x/image/internal/safemath
 golang.org/x/image/tiff
 golang.org/x/image/tiff/lzw
-# golang.org/x/net v0.30.0
+# golang.org/x/net v0.56.0
-## explicit; go 1.18
+## explicit; go 1.25.0
 golang.org/x/net/context
-# golang.org/x/sync v0.8.0
+# golang.org/x/sync v0.21.0
-## explicit; go 1.18
+## explicit; go 1.25.0
 golang.org/x/sync/errgroup
+# golang.org/x/sys v0.46.0
+## explicit; go 1.25.0
+golang.org/x/sys/cpu
+golang.org/x/sys/unix
+golang.org/x/sys/windows
+# golang.org/x/text v0.38.0
+## explicit; go 1.25.0
+golang.org/x/text/encoding
+golang.org/x/text/encoding/internal
+golang.org/x/text/encoding/internal/identifier
+golang.org/x/text/encoding/unicode
+golang.org/x/text/internal/utf8internal
+golang.org/x/text/runes
+golang.org/x/text/transform
+golang.org/x/text/unicode/norm
 # gopkg.in/yaml.v2 v2.4.0
 ## explicit; go 1.15
 gopkg.in/yaml.v2

cmd/cbconvert-gui/go.mod

@@ -4,8 +4,8 @@ go 1.26
 
 require (
 	github.com/fvbommel/sortorder v1.1.0
-	github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42
+	github.com/gen2brain/cbconvert v1.2.0
-	github.com/gen2brain/iup-go/iup v0.32.1-0.20260626100855-f328861e3291
+	github.com/gen2brain/iup-go/iup v0.32.1-0.20260627135200-7df674d35173
 )
 
 require (
@@ -23,15 +23,15 @@ require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/ebitengine/purego v0.10.1 // indirect
 	github.com/gen2brain/avif v0.5.1 // indirect
-	github.com/gen2brain/go-fitz v1.24.15 // indirect
+	github.com/gen2brain/go-fitz v1.28.1 // indirect
 	github.com/gen2brain/jpegli v0.4.1 // indirect
-	github.com/gen2brain/jpegxl v0.5.1 // indirect
+	github.com/gen2brain/jpegn v0.4.2 // indirect
+	github.com/gen2brain/jpegxl v0.5.2 // indirect
 	github.com/gen2brain/webp v0.6.1 // indirect
 	github.com/go-errors/errors v1.5.1 // indirect
 	github.com/golang/geo v0.0.0-20260625163123-7c0e84413537 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
-	github.com/jupiterrider/ffi v0.7.0 // indirect
 	github.com/klauspost/compress v1.18.6 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/mholt/archives v0.1.5 // indirect

cmd/cbconvert-gui/go.sum

@@ -40,16 +40,18 @@ github.com/fvbommel/sortorder v1.1.0 h1:fUmoe+HLsBTctBDoaBwpQo5N+nrCp8g/BjKb/6ZQ
 github.com/fvbommel/sortorder v1.1.0/go.mod h1:uk88iVf1ovNn1iLfgUVU2F9o5eO30ui720w+kxuqRs0=
 github.com/gen2brain/avif v0.5.1 h1:LQzLsJpWyGlsa4wuZ3D57qEbCiICIK7Yidz5ZPEwzTk=
 github.com/gen2brain/avif v0.5.1/go.mod h1:QgrYqdVE9y40PCfArK9VakcMIpYeDYpZmCSLkW6C1n8=
-github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42 h1:p1K1jOk+rKDhTgh6fiYMKSqXJdIVUWFLK5jodTtwPOU=
+github.com/gen2brain/cbconvert v1.2.0 h1:eUs5MPzft+Lo9ADMYYQ5AzydO54Pv0YYUTm2lPo3XDo=
-github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42/go.mod h1:qHzMhKZ7VBTffwDQ/9rc4yZ9FO5677ZSjSFZ7QNfaLw=
+github.com/gen2brain/cbconvert v1.2.0/go.mod h1:/6QtSgf47bDBmtkidNoYwNMHaebsDhPTKnDMmyNUd9E=
-github.com/gen2brain/go-fitz v1.24.15 h1:sJNB1MOWkqnzzENPHggFpgxTwW0+S5WF/rM5wUBpJWo=
+github.com/gen2brain/go-fitz v1.28.1 h1:ToEYb2vN4ByaL2VmRNGk92Sa1UAkCn8bsObpA3WkQ48=
-github.com/gen2brain/go-fitz v1.24.15/go.mod h1:SftkiVbTHqF141DuiLwBBM65zP7ig6AVDQpf2WlHamo=
+github.com/gen2brain/go-fitz v1.28.1/go.mod h1:pY2hqAjp9Zy7qfPI2gwbJMHBFAdZpVXOLrRxD82l3Bs=
-github.com/gen2brain/iup-go/iup v0.32.1-0.20260626100855-f328861e3291 h1:ad/nhBGhknOGDpiHnQ0ZLltZccG82t4tAKK94SrQ8OY=
+github.com/gen2brain/iup-go/iup v0.32.1-0.20260627135200-7df674d35173 h1:nBt0N1ixK8eg/7RXJIC4b0WDPxfENqyT+rH1/STZGj4=
-github.com/gen2brain/iup-go/iup v0.32.1-0.20260626100855-f328861e3291/go.mod h1:V4f7tHOJAeHtjQ+ju795QKv6DGdLEb4L5cmWB1sjSzU=
+github.com/gen2brain/iup-go/iup v0.32.1-0.20260627135200-7df674d35173/go.mod h1:V4f7tHOJAeHtjQ+ju795QKv6DGdLEb4L5cmWB1sjSzU=
 github.com/gen2brain/jpegli v0.4.1 h1:qc11IQU0jTYFltroulT4MXmbu9YRftqHV0YBZ0Bqz5o=
 github.com/gen2brain/jpegli v0.4.1/go.mod h1:zJ++s4symmKCN1CLkrY0dGXTY3s0NWbd94Rz9KLdCzk=
-github.com/gen2brain/jpegxl v0.5.1 h1:UuBUIkZ35DErImU3bTA6rltfV5zSgVNOA/K5a6JibfE=
+github.com/gen2brain/jpegn v0.4.2 h1:sxy2yolV1eNA02uYtnqBFm4EIC3ETnars98aG7Dc4LM=
-github.com/gen2brain/jpegxl v0.5.1/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
+github.com/gen2brain/jpegn v0.4.2/go.mod h1:YvcVOmVPSAsefH6yn9HBW3uY0EHlZwCMoiJXoAWfgL0=
+github.com/gen2brain/jpegxl v0.5.2 h1:1ou9YRziU8PbpkfFJIyxrNjYM+WaMl2n9LloABxkKsU=
+github.com/gen2brain/jpegxl v0.5.2/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
 github.com/gen2brain/webp v0.6.1 h1:ei7Y1SWpQcdqz3YNDNyn4y2nQanxs9WLzwW5/2DKS64=
 github.com/gen2brain/webp v0.6.1/go.mod h1:iGWMaCSw7t3I/Cv9llzEKmpnR36S8lS8VL/ZVjxU0JE=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
@@ -69,8 +71,6 @@ github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyf
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 h1:YLvr1eE6cdCqjOe972w/cYF+FjW34v27+9Vo5106B4M=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25/go.mod h1:kLgvv7o6UM+0QSf0QjAse3wReFDsb9qbZJdfexWlrQw=
-github.com/jupiterrider/ffi v0.7.0 h1:RKsl6Ascal+3kyAqR5Qcbp83LceQMLc1VZbPfHWoNzs=
-github.com/jupiterrider/ffi v0.7.0/go.mod h1:9dauhpOfNqrqk28fxuu0kkdeFtT9Qr4vbfigiuIXN7c=
 github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.18.6 h1:2jupLlAwFm95+YDR+NwD2MEfFO9d4z4Prjl1XXDjuao=
 github.com/klauspost/compress v1.18.6/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=

cmd/cbconvert-gui/i18n/i18n_cs.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Minimální velikost (MiB):",
 		TipSize:       "Zpracovat pouze soubory větší než minimální velikost",
 		LblDPI:        "DPI dokumentu:",
-		TipDPI:        "Rozlišení pro vykreslování dokumentů (PDF, EPUB atd.); výchozí je 300",
+		TipDPI:        "Rozlišení pro vykreslování dokumentů (PDF, EPUB atd.); výchozí používá původní rozlišení",
 
 		LblOutDir:      "Výstupní adresář:",
 		TipOutDir:      "Adresář, do kterého se zapisují převedené soubory (povinné)",

cmd/cbconvert-gui/i18n/i18n_de.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Mindestgröße (MiB):",
 		TipSize:       "Nur Dateien größer als die Mindestgröße verarbeiten",
 		LblDPI:        "Dokument-DPI:",
-		TipDPI:        "Auflösung zum Rendern von Dokumenten (PDF, EPUB usw.); Standard ist 300",
+		TipDPI:        "Auflösung zum Rendern von Dokumenten (PDF, EPUB usw.); Standard verwendet die Originalauflösung",
 
 		LblOutDir:      "Ausgabeverzeichnis:",
 		TipOutDir:      "Verzeichnis, in das konvertierte Dateien geschrieben werden (erforderlich)",

cmd/cbconvert-gui/i18n/i18n_en.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Minimum Size (MiB):",
 		TipSize:       "Process only files larger than minimum size",
 		LblDPI:        "Document DPI:",
-		TipDPI:        "Resolution for rendering documents (PDF, EPUB, etc.); Default is 300",
+		TipDPI:        "Resolution for rendering documents (PDF, EPUB, etc.); Default uses the original resolution",
 
 		LblOutDir:      "Output Directory:",
 		TipOutDir:      "Directory where converted files are written (required)",

cmd/cbconvert-gui/i18n/i18n_es.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Tamaño mínimo (MiB):",
 		TipSize:       "Procesar solo archivos mayores que el tamaño mínimo",
 		LblDPI:        "DPI del documento:",
-		TipDPI:        "Resolución para renderizar documentos (PDF, EPUB, etc.); el valor predeterminado es 300",
+		TipDPI:        "Resolución para renderizar documentos (PDF, EPUB, etc.); el valor predeterminado usa la resolución original",
 
 		LblOutDir:      "Directorio de salida:",
 		TipOutDir:      "Directorio donde se escriben los archivos convertidos (obligatorio)",

cmd/cbconvert-gui/i18n/i18n_fr.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Taille minimale (Mio) :",
 		TipSize:       "Ne traiter que les fichiers plus grands que la taille minimale",
 		LblDPI:        "DPI du document :",
-		TipDPI:        "Résolution pour le rendu des documents (PDF, EPUB, etc.) ; la valeur par défaut est 300",
+		TipDPI:        "Résolution pour le rendu des documents (PDF, EPUB, etc.) ; la valeur par défaut utilise la résolution d'origine",
 
 		LblOutDir:      "Dossier de sortie :",
 		TipOutDir:      "Dossier où les fichiers convertis sont écrits (obligatoire)",

cmd/cbconvert-gui/i18n/i18n_it.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Dimensione minima (MiB):",
 		TipSize:       "Elabora solo i file più grandi della dimensione minima",
 		LblDPI:        "DPI del documento:",
-		TipDPI:        "Risoluzione per il rendering dei documenti (PDF, EPUB, ecc.); il valore predefinito è 300",
+		TipDPI:        "Risoluzione per il rendering dei documenti (PDF, EPUB, ecc.); il valore predefinito usa la risoluzione originale",
 
 		LblOutDir:      "Cartella di uscita:",
 		TipOutDir:      "Cartella in cui vengono scritti i file convertiti (obbligatoria)",

cmd/cbconvert-gui/i18n/i18n_ja.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "最小サイズ (MiB)：",
 		TipSize:       "最小サイズより大きいファイルのみ処理する",
 		LblDPI:        "ドキュメント DPI：",
-		TipDPI:        "ドキュメント（PDF、EPUB など）をレンダリングする解像度。既定値は 300",
+		TipDPI:        "ドキュメント（PDF、EPUB など）をレンダリングする解像度。既定値は元の解像度を使用します",
 
 		LblOutDir:      "出力ディレクトリ：",
 		TipOutDir:      "変換されたファイルが書き込まれるディレクトリ（必須）",

cmd/cbconvert-gui/i18n/i18n_pt.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Tamanho mínimo (MiB):",
 		TipSize:       "Processar apenas arquivos maiores que o tamanho mínimo",
 		LblDPI:        "DPI do documento:",
-		TipDPI:        "Resolução para renderizar documentos (PDF, EPUB, etc.); o padrão é 300",
+		TipDPI:        "Resolução para renderizar documentos (PDF, EPUB, etc.); o padrão usa a resolução original",
 
 		LblOutDir:      "Diretório de saída:",
 		TipOutDir:      "Diretório onde os arquivos convertidos são gravados (obrigatório)",

cmd/cbconvert-gui/i18n/i18n_ru.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "Минимальный размер (МиБ):",
 		TipSize:       "Обрабатывать только файлы больше минимального размера",
 		LblDPI:        "DPI документа:",
-		TipDPI:        "Разрешение для рендеринга документов (PDF, EPUB и т. д.); по умолчанию 300",
+		TipDPI:        "Разрешение для рендеринга документов (PDF, EPUB и т. д.); по умолчанию используется исходное разрешение",
 
 		LblOutDir:      "Каталог вывода:",
 		TipOutDir:      "Каталог, в который записываются преобразованные файлы (обязательно)",

cmd/cbconvert-gui/i18n/i18n_zh.go

@@ -27,7 +27,7 @@ func init() {
 		LblMinSize:    "最小大小 (MiB)：",
 		TipSize:       "仅处理大于最小大小的文件",
 		LblDPI:        "文档 DPI：",
-		TipDPI:        "渲染文档的分辨率（PDF、EPUB 等）；默认值为 300",
+		TipDPI:        "渲染文档的分辨率（PDF、EPUB 等）；默认使用原始分辨率",
 
 		LblOutDir:      "输出目录：",
 		TipOutDir:      "写入转换后文件的目录（必填）",

cmd/cbconvert-gui/settings.go

@@ -148,6 +148,8 @@ func settingsApply(group string) {
 		}
 	}
 
+	userLossless = iup.GetHandle("Lossless").GetAttribute("VALUE") == "ON"
+
 	syncLabels()
 	setActive()
 	previewPost()

cmd/cbconvert-gui/state.go

@@ -1,10 +1,40 @@
 package main
 
 import (
+	"runtime/debug"
+	"strings"
+
 	"github.com/gen2brain/cbconvert/cmd/cbconvert-gui/i18n"
 	"github.com/gen2brain/iup-go/iup"
 )
 
+// jxlLosslessBuild reports whether wasm2go and nodynamic leave zune-jpegxl (lossless-only) as the only jxl encoder.
+var jxlLosslessBuild = func() bool {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return false
+	}
+	var wasm2go, nodynamic bool
+	for _, kv := range info.Settings {
+		if kv.Key != "-tags" {
+			continue
+		}
+		for _, t := range strings.Split(kv.Value, ",") {
+			switch t {
+			case "wasm2go":
+				wasm2go = true
+			case "nodynamic":
+				nodynamic = true
+			}
+		}
+	}
+	return wasm2go && nodynamic
+}()
+
+// userLossless is the user's Lossless preference, tracked separately because a jxl
+// wasm2go build force-sets the widget on.
+var userLossless bool
+
 func setActive() {
 	if busy {
 		return
@@ -68,7 +98,15 @@ func setActive() {
 	}
 
 	canLossless := opts.Format == "webp" || opts.Format == "avif" || opts.Format == "jxl"
-	losslessOn := canLossless && opts.Lossless
+	jxlLossless := jxlLosslessBuild && opts.Format == "jxl"
+
+	// jxl wasm2go forces lossless on; otherwise show the user's preference so it doesn't stay stuck on.
+	losslessVal := "OFF"
+	if jxlLossless || userLossless {
+		losslessVal = "ON"
+	}
+	iup.GetHandle("Lossless").SetAttribute("VALUE", losslessVal)
+	losslessOn := jxlLossless || (canLossless && userLossless)
 
 	if (opts.Format == "jpeg" || canLossless) && !opts.NoConvert && !losslessOn {
 		iup.GetHandle("VboxQuality").SetAttribute("ACTIVE", "YES")
@@ -84,6 +122,11 @@ func setActive() {
 		iup.GetHandle("Lossless").SetAttribute("ACTIVE", "NO")
 	}
 
+	if jxlLossless {
+		iup.GetHandle("Lossless").SetAttribute("ACTIVE", "NO")
+		iup.GetHandle("VboxEffort").SetAttribute("ACTIVE", "NO")
+	}
+
 	if opts.Width != 0 && opts.Height != 0 && !opts.NoConvert {
 		iup.GetHandle("Fit").SetAttribute("ACTIVE", "YES")
 	} else {

cmd/cbconvert-gui/widgets.go

@@ -60,7 +60,7 @@ func list() iup.Ihandle {
 		"TITLE1":         i18n.Lng(i18n.ColTitle),
 		"TITLE2":         i18n.Lng(i18n.ColType),
 		"TITLE3":         i18n.Lng(i18n.ColSize),
-		"WIDTH1":         "300",
+		"WIDTH1":         "250",
 		"WIDTH2":         "50",
 		"WIDTH3":         "100",
 		"ALIGNMENT2":     "ACENTER",
@@ -568,6 +568,7 @@ func tabImage() iup.Ihandle {
 				iup.Toggle(i18n.Lng(i18n.TglLossless)).SetHandle("Lossless").
 					SetAttribute("TIP", i18n.Lng(i18n.TipLossless)).
 					SetCallback("VALUECHANGED_CB", iup.ValueChangedFunc(func(ih iup.Ihandle) int {
+						userLossless = ih.GetAttribute("VALUE") == "ON"
 						setActive()
 						previewPost()
 

cmd/cbconvert/go.mod

@@ -3,7 +3,7 @@ module github.com/gen2brain/cbconvert/cmd/cbconvert
 go 1.26
 
 require (
-	github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42
+	github.com/gen2brain/cbconvert v1.2.0
 	github.com/schollz/progressbar/v3 v3.19.0
 	golang.org/x/term v0.44.0
 )
@@ -24,15 +24,15 @@ require (
 	github.com/ebitengine/purego v0.10.1 // indirect
 	github.com/fvbommel/sortorder v1.1.0 // indirect
 	github.com/gen2brain/avif v0.5.1 // indirect
-	github.com/gen2brain/go-fitz v1.24.15 // indirect
+	github.com/gen2brain/go-fitz v1.28.1 // indirect
 	github.com/gen2brain/jpegli v0.4.1 // indirect
-	github.com/gen2brain/jpegxl v0.5.1 // indirect
+	github.com/gen2brain/jpegn v0.4.2 // indirect
+	github.com/gen2brain/jpegxl v0.5.2 // indirect
 	github.com/gen2brain/webp v0.6.1 // indirect
 	github.com/go-errors/errors v1.5.1 // indirect
 	github.com/golang/geo v0.0.0-20260625163123-7c0e84413537 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
-	github.com/jupiterrider/ffi v0.7.0 // indirect
 	github.com/klauspost/compress v1.18.6 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/mattn/go-runewidth v0.0.24 // indirect

cmd/cbconvert/go.sum

@@ -44,14 +44,16 @@ github.com/fvbommel/sortorder v1.1.0 h1:fUmoe+HLsBTctBDoaBwpQo5N+nrCp8g/BjKb/6ZQ
 github.com/fvbommel/sortorder v1.1.0/go.mod h1:uk88iVf1ovNn1iLfgUVU2F9o5eO30ui720w+kxuqRs0=
 github.com/gen2brain/avif v0.5.1 h1:LQzLsJpWyGlsa4wuZ3D57qEbCiICIK7Yidz5ZPEwzTk=
 github.com/gen2brain/avif v0.5.1/go.mod h1:QgrYqdVE9y40PCfArK9VakcMIpYeDYpZmCSLkW6C1n8=
-github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42 h1:p1K1jOk+rKDhTgh6fiYMKSqXJdIVUWFLK5jodTtwPOU=
+github.com/gen2brain/cbconvert v1.2.0 h1:eUs5MPzft+Lo9ADMYYQ5AzydO54Pv0YYUTm2lPo3XDo=
-github.com/gen2brain/cbconvert v1.0.5-0.20260626071631-8155626dbb42/go.mod h1:qHzMhKZ7VBTffwDQ/9rc4yZ9FO5677ZSjSFZ7QNfaLw=
+github.com/gen2brain/cbconvert v1.2.0/go.mod h1:/6QtSgf47bDBmtkidNoYwNMHaebsDhPTKnDMmyNUd9E=
-github.com/gen2brain/go-fitz v1.24.15 h1:sJNB1MOWkqnzzENPHggFpgxTwW0+S5WF/rM5wUBpJWo=
+github.com/gen2brain/go-fitz v1.28.1 h1:ToEYb2vN4ByaL2VmRNGk92Sa1UAkCn8bsObpA3WkQ48=
-github.com/gen2brain/go-fitz v1.24.15/go.mod h1:SftkiVbTHqF141DuiLwBBM65zP7ig6AVDQpf2WlHamo=
+github.com/gen2brain/go-fitz v1.28.1/go.mod h1:pY2hqAjp9Zy7qfPI2gwbJMHBFAdZpVXOLrRxD82l3Bs=
 github.com/gen2brain/jpegli v0.4.1 h1:qc11IQU0jTYFltroulT4MXmbu9YRftqHV0YBZ0Bqz5o=
 github.com/gen2brain/jpegli v0.4.1/go.mod h1:zJ++s4symmKCN1CLkrY0dGXTY3s0NWbd94Rz9KLdCzk=
-github.com/gen2brain/jpegxl v0.5.1 h1:UuBUIkZ35DErImU3bTA6rltfV5zSgVNOA/K5a6JibfE=
+github.com/gen2brain/jpegn v0.4.2 h1:sxy2yolV1eNA02uYtnqBFm4EIC3ETnars98aG7Dc4LM=
-github.com/gen2brain/jpegxl v0.5.1/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
+github.com/gen2brain/jpegn v0.4.2/go.mod h1:YvcVOmVPSAsefH6yn9HBW3uY0EHlZwCMoiJXoAWfgL0=
+github.com/gen2brain/jpegxl v0.5.2 h1:1ou9YRziU8PbpkfFJIyxrNjYM+WaMl2n9LloABxkKsU=
+github.com/gen2brain/jpegxl v0.5.2/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
 github.com/gen2brain/webp v0.6.1 h1:ei7Y1SWpQcdqz3YNDNyn4y2nQanxs9WLzwW5/2DKS64=
 github.com/gen2brain/webp v0.6.1/go.mod h1:iGWMaCSw7t3I/Cv9llzEKmpnR36S8lS8VL/ZVjxU0JE=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
@@ -71,8 +73,6 @@ github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyf
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 h1:YLvr1eE6cdCqjOe972w/cYF+FjW34v27+9Vo5106B4M=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25/go.mod h1:kLgvv7o6UM+0QSf0QjAse3wReFDsb9qbZJdfexWlrQw=
-github.com/jupiterrider/ffi v0.7.0 h1:RKsl6Ascal+3kyAqR5Qcbp83LceQMLc1VZbPfHWoNzs=
-github.com/jupiterrider/ffi v0.7.0/go.mod h1:9dauhpOfNqrqk28fxuu0kkdeFtT9Qr4vbfigiuIXN7c=
 github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.18.6 h1:2jupLlAwFm95+YDR+NwD2MEfFO9d4z4Prjl1XXDjuao=
 github.com/klauspost/compress v1.18.6/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=

cmd/cbconvert/main.go

@@ -216,7 +216,7 @@ func parseFlags() (cbconvert.Options, []string) {
 	convert.IntVar(&opts.Height, "height", base.Height, "Image height")
 	convert.BoolVar(&opts.Fit, "fit", base.Fit, "Best fit for required width and height")
 	convert.BoolVar(&opts.NoUpscale, "no-upscale", base.NoUpscale, "Do not upscale images already smaller than the requested width/height")
-	convert.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the default (300)")
+	convert.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the original resolution")
 	convert.StringVar(&opts.Format, "format", base.Format, "Image format, valid values are jpeg, png, tiff, bmp, webp, avif, jxl")
 	convert.StringVar(&opts.Archive, "archive", base.Archive, "Archive format, valid values are zip, tar")
 	convert.IntVar(&opts.ZipLevel, "zip-level", base.ZipLevel, "ZIP compression level, 0 disables compression, 1-9 sets deflate level (1 fastest, 9 smallest), -1 uses the default")
@@ -246,7 +246,7 @@ func parseFlags() (cbconvert.Options, []string) {
 	cover.IntVar(&opts.Height, "height", base.Height, "Image height")
 	cover.BoolVar(&opts.Fit, "fit", base.Fit, "Best fit for required width and height")
 	cover.BoolVar(&opts.NoUpscale, "no-upscale", base.NoUpscale, "Do not upscale images already smaller than the requested width/height")
-	cover.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the default (300)")
+	cover.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the original resolution")
 	cover.StringVar(&opts.Format, "format", base.Format, "Image format, valid values are jpeg, png, tiff, bmp, webp, avif")
 	cover.IntVar(&opts.Quality, "quality", base.Quality, "Image quality")
 	cover.IntVar(&opts.Effort, "effort", base.Effort, "Encoder speed/effort, format-specific (webp method 0-6, avif speed 0-10, jxl effort 1-10), -1 uses the format default")
@@ -263,7 +263,7 @@ func parseFlags() (cbconvert.Options, []string) {
 	thumbnail.IntVar(&opts.Height, "height", base.Height, "Image height")
 	thumbnail.BoolVar(&opts.Fit, "fit", base.Fit, "Best fit for required width and height")
 	thumbnail.BoolVar(&opts.NoUpscale, "no-upscale", base.NoUpscale, "Do not upscale images already smaller than the requested width/height")
-	thumbnail.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the default (300)")
+	thumbnail.IntVar(&opts.DPI, "dpi", base.DPI, "Document rendering resolution in DPI (PDF, EPUB, etc.), 0 uses the original resolution")
 	thumbnail.IntVar(&opts.Filter, "filter", base.Filter, "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 5=Gaussian, 6=Lanczos")
 	thumbnail.StringVar(&opts.OutDir, "outdir", base.OutDir, "Output directory")
 	thumbnail.StringVar(&opts.OutFile, "outfile", base.OutFile, "Output file")

go.mod

@@ -8,9 +8,9 @@ require (
 	github.com/dustin/go-humanize v1.0.1
 	github.com/fvbommel/sortorder v1.1.0
 	github.com/gen2brain/avif v0.5.1
-	github.com/gen2brain/go-fitz v1.24.15
+	github.com/gen2brain/go-fitz v1.28.1
 	github.com/gen2brain/jpegli v0.4.1
-	github.com/gen2brain/jpegxl v0.5.1
+	github.com/gen2brain/jpegxl v0.5.2
 	github.com/gen2brain/webp v0.6.1
 	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25
 	github.com/mholt/archives v0.1.5
@@ -29,10 +29,10 @@ require (
 	github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect
 	github.com/dsoprea/go-utility v0.0.0-20221003172846-a3e1774ef349 // indirect
 	github.com/ebitengine/purego v0.10.1 // indirect
+	github.com/gen2brain/jpegn v0.4.2
 	github.com/go-errors/errors v1.5.1 // indirect
 	github.com/golang/geo v0.0.0-20260625163123-7c0e84413537 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
-	github.com/jupiterrider/ffi v0.7.0 // indirect
 	github.com/klauspost/compress v1.18.6 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/mikelolasagasti/xz v1.0.1 // indirect

go.sum

@@ -40,12 +40,14 @@ github.com/fvbommel/sortorder v1.1.0 h1:fUmoe+HLsBTctBDoaBwpQo5N+nrCp8g/BjKb/6ZQ
 github.com/fvbommel/sortorder v1.1.0/go.mod h1:uk88iVf1ovNn1iLfgUVU2F9o5eO30ui720w+kxuqRs0=
 github.com/gen2brain/avif v0.5.1 h1:LQzLsJpWyGlsa4wuZ3D57qEbCiICIK7Yidz5ZPEwzTk=
 github.com/gen2brain/avif v0.5.1/go.mod h1:QgrYqdVE9y40PCfArK9VakcMIpYeDYpZmCSLkW6C1n8=
-github.com/gen2brain/go-fitz v1.24.15 h1:sJNB1MOWkqnzzENPHggFpgxTwW0+S5WF/rM5wUBpJWo=
+github.com/gen2brain/go-fitz v1.28.1 h1:ToEYb2vN4ByaL2VmRNGk92Sa1UAkCn8bsObpA3WkQ48=
-github.com/gen2brain/go-fitz v1.24.15/go.mod h1:SftkiVbTHqF141DuiLwBBM65zP7ig6AVDQpf2WlHamo=
+github.com/gen2brain/go-fitz v1.28.1/go.mod h1:pY2hqAjp9Zy7qfPI2gwbJMHBFAdZpVXOLrRxD82l3Bs=
 github.com/gen2brain/jpegli v0.4.1 h1:qc11IQU0jTYFltroulT4MXmbu9YRftqHV0YBZ0Bqz5o=
 github.com/gen2brain/jpegli v0.4.1/go.mod h1:zJ++s4symmKCN1CLkrY0dGXTY3s0NWbd94Rz9KLdCzk=
-github.com/gen2brain/jpegxl v0.5.1 h1:UuBUIkZ35DErImU3bTA6rltfV5zSgVNOA/K5a6JibfE=
+github.com/gen2brain/jpegn v0.4.2 h1:sxy2yolV1eNA02uYtnqBFm4EIC3ETnars98aG7Dc4LM=
-github.com/gen2brain/jpegxl v0.5.1/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
+github.com/gen2brain/jpegn v0.4.2/go.mod h1:YvcVOmVPSAsefH6yn9HBW3uY0EHlZwCMoiJXoAWfgL0=
+github.com/gen2brain/jpegxl v0.5.2 h1:1ou9YRziU8PbpkfFJIyxrNjYM+WaMl2n9LloABxkKsU=
+github.com/gen2brain/jpegxl v0.5.2/go.mod h1:Wlc6lqx03RJfhiQRyHa2e+8VQwT4/qv7zSRsNv9T+yE=
 github.com/gen2brain/webp v0.6.1 h1:ei7Y1SWpQcdqz3YNDNyn4y2nQanxs9WLzwW5/2DKS64=
 github.com/gen2brain/webp v0.6.1/go.mod h1:iGWMaCSw7t3I/Cv9llzEKmpnR36S8lS8VL/ZVjxU0JE=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
@@ -56,6 +58,7 @@ github.com/go-errors/errors v1.5.1/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3Bop
 github.com/golang/geo v0.0.0-20190916061304-5b978397cfec/go.mod h1:QZ0nwyI2jOfgRAoBvP+ab5aRr7c9x7lhGEJrKvBwjWI=
 github.com/golang/geo v0.0.0-20200319012246-673a6f80352d/go.mod h1:QZ0nwyI2jOfgRAoBvP+ab5aRr7c9x7lhGEJrKvBwjWI=
 github.com/golang/geo v0.0.0-20260625163123-7c0e84413537 h1:KeIaDS/+VEy/bhDYjG3Z78dOyLAU4HXcVxmd0WYHJTE=
+github.com/golang/geo v0.0.0-20260625163123-7c0e84413537/go.mod h1:Mymr9kRGDc64JPr03TSZmuIBODZ3KyswLzm1xL0HFA8=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
@@ -64,8 +67,6 @@ github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyf
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 h1:YLvr1eE6cdCqjOe972w/cYF+FjW34v27+9Vo5106B4M=
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25/go.mod h1:kLgvv7o6UM+0QSf0QjAse3wReFDsb9qbZJdfexWlrQw=
-github.com/jupiterrider/ffi v0.7.0 h1:RKsl6Ascal+3kyAqR5Qcbp83LceQMLc1VZbPfHWoNzs=
-github.com/jupiterrider/ffi v0.7.0/go.mod h1:9dauhpOfNqrqk28fxuu0kkdeFtT9Qr4vbfigiuIXN7c=
 github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.18.6 h1:2jupLlAwFm95+YDR+NwD2MEfFO9d4z4Prjl1XXDjuao=
 github.com/klauspost/compress v1.18.6/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=