xiaoqidun/ofdgo
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refactor(色彩管理): 统一色彩与四色保真
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xiaoqidun committed 2026-10-16 00:05:46 +08:00
1 parent 5e0bca66e3
commit b5a8c9af9c
24 files changed
+935 -223
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ofdgo_pdf_image.go
+48 -37
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@@ -106,12 +106,14 @@ func (p *pdfImporter) image(mark pdfgo.ImageMark) error {
}
if source.ImageMask {
fill := mark.Style.Fill.RGB
if values := mark.Style.Fill.CMYK; values != nil {
if space := mark.Style.Fill.Space; space != nil {
fill, err = space.SRGB(mark.Style.Fill.Values[:space.Components()], mark.Style.RenderingIntent)
} else if values := mark.Style.Fill.CMYK; values != nil {
space := &pdfgo.ColorSpace{Model: "DeviceCMYK"}
fill, err = space.RGB(values[:], mark.Style.RenderingIntent)
if err != nil {
return err
}
fill, err = space.SRGB(values[:], mark.Style.RenderingIntent)
}
if err != nil {
return err
}
key.tint = color.NRGBA64{
R: uint16(math.Round(fill[0] * 65535)),
@@ -145,41 +147,50 @@ func (p *pdfImporter) image(mark pdfgo.ImageMark) error {
}
}
if id == "" {
var data []byte
if !source.ImageMask && key.process == "" && p.compression.Mode != CompressionLossy {
data, err = codecpdf.EncodeCMYKTIFF(p.ctx, source)
if err != nil {
return err
}
}
var jbig2Original, jpegOriginal []byte
var decoded image.Image
if key.process != "" {
decoded, err = p.imageProcess(source, key.process)
if err != nil {
return err
}
if key.size != (image.Point{}) {
decoded, err = pdfgo.ResizeImage(p.ctx, decoded, key.size)
if err != nil {
return err
}
}
} else {
jbig2Original, err = source.JBIG2FileContext(p.ctx)
if err != nil {
return err
}
jpegOriginal, err = source.JPEGFileContext(p.ctx)
if err != nil {
return err
}
if len(jbig2Original) == 0 && len(jpegOriginal) == 0 && (source.ImageMask || key.size != (image.Point{})) {
decoded, err = source.DecodeImageSizeContext(p.ctx, key.size)
if err != nil {
return err
}
}
}
if source.ImageMask {
decoded = &codecpdf.StencilImage{Source: decoded, Fill: key.tint}
}
data := jbig2Original
if len(data) == 0 {
data = jpegOriginal
if key.process != "" {
decoded, err = p.imageProcess(source, key.process)
if err != nil {
return err
}
if key.size != (image.Point{}) {
decoded, err = pdfgo.ResizeImage(p.ctx, decoded, key.size)
if err != nil {
return err
}
}
} else {
jbig2Original, err = source.JBIG2FileContext(p.ctx)
if err != nil {
return err
}
jpegOriginal, err = source.JPEGFileContext(p.ctx)
if err != nil {
return err
}
if len(jbig2Original) == 0 && len(jpegOriginal) == 0 && (source.ImageMask || key.size != (image.Point{})) {
decoded, err = source.DecodeImageSizeContext(p.ctx, key.size)
if err != nil {
return err
}
}
}
if source.ImageMask {
decoded = &codecpdf.StencilImage{Source: decoded, Fill: key.tint}
}
data = jbig2Original
if len(data) == 0 {
data = jpegOriginal
}
}
optimized := false
if len(data) == 0 && decoded != nil && !source.ImageMask && p.compression.Mode == CompressionLossy {