wehub-resource-sync
f36e2104d8
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49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
package pdf
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import (
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"image"
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pdf "ragflow/internal/deepdoc/parser/pdf/type"
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)
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// cropImageRect crops a rectangular region from an image.
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func cropImageRect(img image.Image, x0, y0, x1, y1 int) image.Image {
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b := img.Bounds()
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if x0 < b.Min.X {
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x0 = b.Min.X
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}
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if y0 < b.Min.Y {
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y0 = b.Min.Y
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}
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if x1 > b.Max.X {
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x1 = b.Max.X
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}
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if y1 > b.Max.Y {
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y1 = b.Max.Y
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}
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out := image.NewRGBA(image.Rect(0, 0, x1-x0, y1-y0))
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for y := y0; y < y1; y++ {
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for x := x0; x < x1; x++ {
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out.Set(x-x0, y-y0, img.At(x, y))
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}
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}
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return out
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}
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// ── testPageImg: small test image for ocrMergeChars tests ─────────────
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// 90×120 px at 216 DPI → 30×40 pt in PDF space after /3.0 scaling.
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func testPageImg() image.Image {
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return image.NewRGBA(image.Rect(0, 0, 90, 120))
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}
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// ── cellTexts: extract text strings from TSRCells ─────────────────────
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func cellTexts(cells []pdf.TSRCell) []string {
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t := make([]string, len(cells))
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for i, c := range cells {
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t[i] = c.Text
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}
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return t
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}
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