feat(文件拆分): 拆分PDF格式适配模块
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xiaoqidun committed 2026-10-14 09:02:24 +08:00
1 parent bec13d523f
commit b3c4bbc844
45 files changed
+1885 -1453

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@@ -27,7 +27,7 @@ import (
"strconv"
"unicode/utf8"
baseimage "github.com/xiaoqidun/ofdgo/internal/base/image"
codecpdf "github.com/xiaoqidun/ofdgo/internal/codec/pdf"
"github.com/xiaoqidun/pdfgo"
)
@@ -46,46 +46,6 @@ type pdfImageResource struct {
id string
}
// pdfStencilImage 按当前填充色读取模板图像,不分配整幅彩色样本
type pdfStencilImage struct {
source image.Image
fill color.NRGBA64
}
// ColorModel 保留填充色和模板的有效采样精度
// 返回: color.Model 非预乘颜色模型
func (s *pdfStencilImage) ColorModel() color.Model {
model := s.source.ColorModel()
if s.fill.R%257 == 0 && s.fill.G%257 == 0 && s.fill.B%257 == 0 && (model == color.GrayModel || model == color.NRGBAModel || model == color.RGBAModel) {
return color.NRGBAModel
}
return color.NRGBA64Model
}
// Bounds 返回模板图像的采样边界
// 返回: image.Rectangle 图像边界
func (s *pdfStencilImage) Bounds() image.Rectangle { return s.source.Bounds() }
// At 以模板灰度计算填充覆盖率,不重复变换颜色
// 入参: x 横向坐标, y 纵向坐标
// 返回: color.Color 非预乘颜色
func (s *pdfStencilImage) At(x, y int) color.Color {
return s.NRGBA64At(x, y)
}
// NRGBA64At 直接读取模板覆盖率,保留填充色的有效精度
// 入参: x 横向坐标, y 纵向坐标
// 返回: color.NRGBA64 非预乘颜色
func (s *pdfStencilImage) NRGBA64At(x, y int) color.NRGBA64 {
if !image.Pt(x, y).In(s.Bounds()) {
return color.NRGBA64{}
}
gray := baseimage.NRGBA64At(s.source, x, y)
pixel := s.fill
pixel.A = uint16(65535 - gray.R)
return pixel
}
// image 转换图像样本,不将整页或其他对象栅格化
// 有损编码复用已解码像素,候选容量超限时沿用原编码路径
// 入参: mark PDF图像绘制信息
@@ -203,7 +163,7 @@ func (p *pdfImporter) image(mark pdfgo.ImageMark) error {
}
}
if source.ImageMask {
decoded = &pdfStencilImage{source: decoded, fill: key.tint}
decoded = &codecpdf.StencilImage{Source: decoded, Fill: key.tint}
}
data := jbig2Original
if len(data) == 0 {