mirror of
https://github.com/unidoc/unipdf.git
synced 2025-04-29 13:48:54 +08:00
Fixes for text extraction corpus testing.
- Correct matrix multiplication order in text.go - Look up standard 14 font widths after applying custom encoding.
This commit is contained in:
Peter Williams
parent
851aa267b1
commit
a9019a50a3
BIN
pdf/extractor/testdata/000026.pdf
vendored
Normal file
BIN
pdf/extractor/testdata/000026.pdf
vendored
Normal file
Binary file not shown.
@ -266,7 +266,7 @@ func (e *Extractor) ExtractXYText() (*TextList, int, int, error) {
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err = processor.Process(e.resources)
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if err != nil {
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common.Log.Error("ERROR: Processing: err=%v", err)
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common.Log.Debug("ERROR: Processing: err=%v", err)
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}
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return textList, state.numChars, state.numMisses, err
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}
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@ -406,7 +406,7 @@ func (to *textObject) setTextRise(y float64) {
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// setWordSpacing "Tw" Set word spacing.
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func (to *textObject) setWordSpacing(y float64) {
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// Not implemented yet
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to.State.Tw = y
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}
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// setHorizScaling "Tz" Set horizontal scaling.
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@ -609,7 +609,10 @@ func (to *textObject) renderText(data []byte) error {
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0, tfs,
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0, state.Trise)
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common.Log.Debug("%d codes=%+v runes=%q", len(charcodes), charcodes, runes)
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for i, r := range runes {
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code := charcodes[i]
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// The location of the text on the page in device coordinates is given by trm, the text
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// rendering matrix.
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@ -634,19 +637,38 @@ func (to *textObject) renderText(data []byte) error {
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c := Point{X: m.Wx * glyphTextRatio, Y: m.Wy * glyphTextRatio}
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// t is the displacement of the text cursor when the character is rendered.
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// float tx = displacementX * fontSize * horizontalScaling;
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// w = 0
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t0 := Point{X: (c.X*tfs + w) * th}
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t := Point{X: (c.X*tfs + state.Tc + w) * th}
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// td is t in matrix form.
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td0 := translationMatrix(t0)
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td := translationMatrix(t)
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common.Log.Debug("%q stateMatrix=%s CTM=%s Tm=%s", r, stateMatrix, to.gs.CTM, to.Tm)
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common.Log.Debug("tfs=%.3f th=%.3f Tc=%.3f w=%.3f (Tw=%.3f)", tfs, th, state.Tc, w, state.Tw)
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common.Log.Debug("m=%s c=%+v t0=%+v td0=%s trm0=%s",
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m, c, t0, td0, td0.Mult(to.Tm).Mult(to.gs.CTM))
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common.Log.Debug("m=%s c=%+v t=%+v td=%s trm=%s",
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m, c, t, td, td.Mult(to.Tm).Mult(to.gs.CTM))
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nextTm := to.Tm.Mult(td)
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xyt := XYText{Text: string(r),
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Point: translation(trm),
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Orient: trm.Orientation(),
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End: translation(to.Tm.Mult(td).Mult(to.gs.CTM)),
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SpaceWidth: spaceWidth * trm.ScalingFactorX(),
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}
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// xyt := XYText{Text: string(r),
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// Point: translation(trm),
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// Orient: trm.Orientation(),
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// // Matrix nextTextRenderingMatrix = td.multiply(textMatrix).multiply(ctm); // text space -> device space
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// End: translation(td0.Mult(to.Tm).Mult(to.gs.CTM)),
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// SpaceWidth: spaceWidth * trm.ScalingFactorX(),
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// }
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xyt := newXYText(
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string(r),
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translation(trm),
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translation(td0.Mult(to.Tm).Mult(to.gs.CTM)),
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trm.Orientation(),
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spaceWidth*trm.ScalingFactorX())
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common.Log.Debug("i=%d code=%d, xyt=%s", i, code, xyt)
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to.Texts = append(to.Texts, xyt)
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// update the text matrix by the displacement of the text location.
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@ -690,11 +712,26 @@ type XYText struct {
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SpaceWidth float64
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Font string
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FontSize float64
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counter int
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}
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var counter int
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func newXYText(text string, point, end Point, orient contentstream.Orientation, spaceWidth float64) XYText {
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counter++
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return XYText{
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Text: text,
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Point: point,
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End: end,
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Orient: orient,
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SpaceWidth: spaceWidth,
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counter: counter,
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}
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}
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// String returns a string describing `t`.
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func (t XYText) String() string {
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return fmt.Sprintf("%s,%s %.1f %q",
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return fmt.Sprintf("@@%d %s,%s %.1f %q", t.counter,
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t.Point.String(), t.End.String(), t.End.X-t.X, truncate(t.Text, 100))
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}
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@ -707,7 +744,7 @@ func (t XYText) Width() float64 {
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default:
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w = math.Abs(t.End.X - t.X)
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}
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common.Log.Trace(" Width %q (%s %s) -> %.1f", t.Text, t.Point.String(), t.End.String(), w)
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common.Log.Debug(" Width %q (%s %s) -> %.1f", t.Text, t.Point.String(), t.End.String(), w)
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return w
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}
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@ -719,20 +756,20 @@ func (tl *TextList) Length() int {
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return len(*tl)
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}
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// AppendText appends the location and contents of `text` to a text list.
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func (tl *TextList) AppendText(gs contentstream.GraphicsState, p, e Point, text string, spaceWidth float64) {
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t := XYText{
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Point: p,
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End: e,
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ColorStroking: gs.ColorStroking,
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ColorNonStroking: gs.ColorNonStroking,
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Orient: gs.PageOrientation(),
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Text: text,
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SpaceWidth: spaceWidth,
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}
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common.Log.Debug("AppendText: %s", t.String())
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*tl = append(*tl, t)
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}
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// // AppendText appends the location and contents of `text` to a text list.
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// func (tl *TextList) AppendText(gs contentstream.GraphicsState, p, e Point, text string, spaceWidth float64) {
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// t := XYText{
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// Point: p,
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// End: e,
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// ColorStroking: gs.ColorStroking,
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// ColorNonStroking: gs.ColorNonStroking,
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// Orient: gs.PageOrientation(),
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// Text: text,
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// SpaceWidth: spaceWidth,
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// }
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// common.Log.Debug("AppendText: %s", t.String())
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// *tl = append(*tl, t)
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// }
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// ToText returns the contents of `tl` as a single string.
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func (tl *TextList) ToText() string {
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@ -794,6 +831,7 @@ func (tl *TextList) toLines() []Line {
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}
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portLines := portText.toLinesOrient()
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landLines := landText.toLinesOrient()
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common.Log.Debug("portText=%d landText=%d", len(portText), len(landText))
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return append(portLines, landLines...)
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}
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@ -816,6 +854,7 @@ func (tl *TextList) toLinesOrient() []Line {
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lastEndX := 0.0 // (*tl)[i-1).End.X
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for _, t := range *tl {
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// common.Log.Debug("%d --------------------------", i)
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if t.Y < y {
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if len(words) > 0 {
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line := newLine(y, x, words)
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@ -846,12 +885,16 @@ func (tl *TextList) toLinesOrient() []Line {
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deltaCharWidth := averageCharWidth.ave * 0.3
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isSpace := false
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if scanning && t.Text != " " {
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nextWordX := lastEndX + min(deltaSpace, deltaCharWidth)
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if scanning && t.Text != " " {
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isSpace = nextWordX < t.X
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common.Log.Trace("[%.1f, %.1f] lastEndX=%.1f nextWordX=%.1f",
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t.Y, t.X, lastEndX, nextWordX)
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}
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common.Log.Debug("t=%s", t)
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common.Log.Debug("width=%.2f delta=%.2f deltaSpace=%.2g deltaCharWidth=%.2g",
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t.Width(), min(deltaSpace, deltaCharWidth), deltaSpace, deltaCharWidth)
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common.Log.Debug("%+q [%.1f, %.1f] lastEndX=%.2f nextWordX=%.2f (%.2f) isSpace=%t",
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t.Text, t.X, t.Y, lastEndX, nextWordX, nextWordX-t.X, isSpace)
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if isSpace {
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words = append(words, " ")
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x = append(x, (lastEndX+t.X)*0.5)
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@ -862,6 +905,7 @@ func (tl *TextList) toLinesOrient() []Line {
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words = append(words, t.Text)
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x = append(x, t.X)
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scanning = true
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common.Log.Debug("lastEndX=%.2f", lastEndX)
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}
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if len(words) > 0 {
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line := newLine(y, x, words)
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@ -898,7 +942,7 @@ func (exp *ExponAve) update(x float64) float64 {
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return exp.ave
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}
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// printTexts is a debugging function. XXX Remove this.
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// printTexts is a debugging function. XXX(peterwilliams97) Remove this.
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func (tl *TextList) printTexts(message string) {
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return
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_, file, line, ok := runtime.Caller(1)
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@ -910,17 +954,17 @@ func (tl *TextList) printTexts(message string) {
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}
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prefix := fmt.Sprintf("[%s:%d]", file, line)
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common.Log.Error("=====================================")
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common.Log.Error("printTexts %s %s", prefix, message)
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common.Log.Error("%d texts", len(*tl))
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common.Log.Debug("=====================================")
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common.Log.Debug("printTexts %s %s", prefix, message)
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common.Log.Debug("%d texts", len(*tl))
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parts := []string{}
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for i, t := range *tl {
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fmt.Printf("%5d: %s\n", i, t.String())
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parts = append(parts, t.Text)
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}
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common.Log.Error("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
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common.Log.Debug("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
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fmt.Printf("%s\n", strings.Join(parts, ""))
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common.Log.Error("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
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common.Log.Debug("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
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}
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// newLine returns the Line representation of strings `words` with y coordinate `y` and x
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@ -17,7 +17,7 @@ import (
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)
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func init() {
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common.SetLogger(common.NewConsoleLogger(common.LogLevelDebug))
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common.SetLogger(common.NewConsoleLogger(common.LogLevelError))
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if flag.Lookup("test.v") != nil {
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isTesting = true
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}
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@ -59,12 +59,20 @@ var extract2Tests = []struct {
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filename string
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expectedPageText map[int][]string
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}{
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{
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filename: "testdata/reader.pdf",
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{filename: "testdata/reader.pdf",
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expectedPageText: map[int][]string{
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1: []string{"A Research UNIX Reader:",
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"Annotated Excerpts from the Programmer's Manual,",
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"Annotated Excerpts from the Programmer’s Manual,",
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"1. Introduction",
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"To keep the size of this report",
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"last common ancestor of a radiative explosion",
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},
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},
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},
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{filename: "testdata/000026.pdf",
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expectedPageText: map[int][]string{
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1: []string{"Fresh Flower",
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"Care & Handling
",
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},
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},
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},
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@ -85,10 +93,9 @@ func testExtract2(t *testing.T, filename string, expectedPageText map[int][]stri
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}
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func containsSentences(t *testing.T, expectedSentences []string, actualText string) bool {
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actualSentences := asSet(strings.Split(actualText, "\n"))
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for _, e := range expectedSentences {
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if _, ok := actualSentences[e]; !ok {
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t.Errorf("No match for %q", e)
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if !strings.Contains(actualText, e) {
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t.Errorf("No match for %+q", e)
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return false
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}
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}
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@ -104,14 +111,6 @@ func sortedKeys(m map[int][]string) []int {
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return keys
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}
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func asSet(keys []string) map[string]bool {
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set := map[string]bool{}
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for _, k := range keys {
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set[k] = true
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}
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return set
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}
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func extractPageTexts(t *testing.T, filename string) (int, map[int]string) {
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f, err := os.Open(filename)
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if err != nil {
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@ -6,7 +6,7 @@
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package textencoding
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// NewSymbolEncoder returns a SimpleEncoder that implements SymbolEncoding.
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func NewSymbolEncoder() SimpleEncoder {
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func NewSymbolEncoder() *SimpleEncoder {
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enc, _ := NewSimpleTextEncoder("SymbolEncoding", nil)
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return *enc
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return enc
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}
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@ -6,7 +6,7 @@
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package textencoding
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// NewWinAnsiTextEncoder returns a SimpleEncoder that implements WinAnsiEncoding.
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func NewWinAnsiTextEncoder() SimpleEncoder {
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func NewWinAnsiTextEncoder() *SimpleEncoder {
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enc, _ := NewSimpleTextEncoder("WinAnsiEncoding", nil)
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return *enc
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return enc
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}
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@ -6,7 +6,7 @@
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package textencoding
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// NewZapfDingbatsEncoder returns a SimpleEncoder that implements ZapfDingbatsEncoding.
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func NewZapfDingbatsEncoder() SimpleEncoder {
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func NewZapfDingbatsEncoder() *SimpleEncoder {
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enc, _ := NewSimpleTextEncoder("ZapfDingbatsEncoding", nil)
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return *enc
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return enc
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}
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@ -263,7 +263,9 @@ func newPdfFontFromPdfObject(fontObj core.PdfObject, allowType0 bool) (*PdfFont,
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font.context = type0font
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case "Type1", "Type3", "MMType1", "TrueType":
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var simplefont *pdfFontSimple
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if std, ok := loadStandard14Font(Standard14Font(base.basefont)); ok && base.subtype == "Type1" {
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std, ok := loadStandard14Font(Standard14Font(base.basefont))
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builtin := ok && base.subtype == "Type1"
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if builtin {
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font.context = &std
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stdObj := core.TraceToDirectObject(std.ToPdfObject())
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@ -283,8 +285,6 @@ func newPdfFontFromPdfObject(fontObj core.PdfObject, allowType0 bool) (*PdfFont,
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return nil, err
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}
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simplefont.firstChar = std.firstChar
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simplefont.lastChar = std.lastChar
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simplefont.charWidths = std.charWidths
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simplefont.fontMetrics = std.fontMetrics
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} else {
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@ -298,6 +298,19 @@ func newPdfFontFromPdfObject(fontObj core.PdfObject, allowType0 bool) (*PdfFont,
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if err != nil {
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return nil, err
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}
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if builtin {
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simplefont.updateStandard14Font()
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}
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if builtin && simplefont.encoder == nil && simplefont.std14Encoder == nil {
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common.Log.Error("simplefont=%s", simplefont)
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common.Log.Error("std=%s", std)
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panic("Not possible")
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}
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if len(simplefont.charWidths) == 0 {
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common.Log.Error("simplefont=%s", simplefont)
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common.Log.Error("std=%s", std)
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common.Log.Debug("ERROR: No widths. font=%s", simplefont)
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}
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font.context = simplefont
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case "CIDFontType0":
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cidfont, err := newPdfCIDFontType0FromPdfObject(d, base)
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@ -415,6 +428,7 @@ func (font PdfFont) BytesToCharcodes(data []byte) []uint16 {
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}
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// CharcodesToUnicode converts the character codes `charcodes` to a slice of unicode strings.
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// XXX(peterwilliams97): Remove int returns.
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func (font PdfFont) CharcodesToUnicode(charcodes []uint16) ([]string, int, int) {
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charstrings := make([]string, 0, len(charcodes))
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numMisses := 0
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@ -426,7 +440,7 @@ func (font PdfFont) CharcodesToUnicode(charcodes []uint16) ([]string, int, int)
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continue
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}
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}
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// Fall back to encoding
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// Fall back to encoding.
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encoder := font.Encoder()
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if encoder != nil {
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r, ok := encoder.CharcodeToRune(code)
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@ -37,13 +37,12 @@ type pdfFontSimple struct {
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container *core.PdfIndirectObject
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// These fields are specific to simple PDF fonts.
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firstChar int
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lastChar int
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charWidths []float64
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charWidths map[uint16]float64
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// std14Encoder is the encoder specified by the /Encoding entry in the font dict.
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encoder textencoding.TextEncoder
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encoder *textencoding.SimpleEncoder
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// std14Encoder is used for Standard 14 fonts where no /Encoding is specified in the font dict.
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std14Encoder textencoding.TextEncoder
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std14Encoder *textencoding.SimpleEncoder
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// std14Descriptor is used for Standard 14 fonts where no /FontDescriptor is specified in the font dict.
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std14Descriptor *PdfFontDescriptor
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@ -76,14 +75,26 @@ func (font *pdfFontSimple) Encoder() textencoding.TextEncoder {
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// Standard 14 fonts have builtin encoders that we fall back to when no /Encoding is specified
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// in the font dict.
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if font.encoder == nil {
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// Need to make font.Encoder()==nil test work for font.std14=Encoder=font.encoder=nil
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// See https://golang.org/doc/faq#nil_error
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if font.std14Encoder == nil {
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return nil
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}
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return font.std14Encoder
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}
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return font.encoder
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}
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// SetEncoder sets the encoding for the underlying font.
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// XXX(peterwilliams97) Change function signature to SetEncoder(encoder *textencoding.SimpleEncoder).
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func (font *pdfFontSimple) SetEncoder(encoder textencoding.TextEncoder) {
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font.encoder = encoder
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simple, ok := encoder.(*textencoding.SimpleEncoder)
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if !ok {
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// This can't happen.
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common.Log.Error("pdfFontSimple.SetEncoder passedbad encoder type %T", encoder)
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simple = nil
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}
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font.encoder = simple
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}
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// GetGlyphCharMetrics returns the character metrics for the specified glyph. A bool flag is
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@ -123,30 +134,21 @@ func (font pdfFontSimple) GetGlyphCharMetrics(glyph string) (fonts.CharMetrics,
|
||||
// GetCharMetrics returns the character metrics for the specified character code. A bool flag is
|
||||
// returned to indicate whether or not the entry was found in the glyph to charcode mapping.
|
||||
func (font pdfFontSimple) GetCharMetrics(code uint16) (fonts.CharMetrics, bool) {
|
||||
metrics := fonts.CharMetrics{}
|
||||
|
||||
if int(code) < font.firstChar {
|
||||
common.Log.Debug("Code lower than firstchar (%d < %d)", code, font.firstChar)
|
||||
return metrics, false
|
||||
if width, ok := font.charWidths[code]; ok {
|
||||
common.Log.Debug("GetCharMetrics 1: code=%d width=%.1f font=%s", code, width, font)
|
||||
return fonts.CharMetrics{Wx: width}, true
|
||||
}
|
||||
|
||||
if int(code) > font.lastChar {
|
||||
common.Log.Debug("ERROR: Code higher than lastchar (%d > %d) %s",
|
||||
code, font.lastChar, font)
|
||||
return metrics, false
|
||||
}
|
||||
|
||||
index := int(code) - font.firstChar
|
||||
if index >= len(font.charWidths) {
|
||||
common.Log.Debug("ERROR: Code outside of widths range (%d > %d) code=%d [%d %d] font=%s",
|
||||
index, len(font.charWidths), code, font.firstChar, font.lastChar, font.String())
|
||||
return metrics, false
|
||||
}
|
||||
|
||||
width := font.charWidths[index]
|
||||
metrics.Wx = width
|
||||
|
||||
if font.encoder != nil {
|
||||
if glyph, ok := font.encoder.CharcodeToGlyph(code); ok {
|
||||
if metrics, ok := font.fontMetrics[glyph]; ok {
|
||||
font.charWidths[code] = metrics.Wx
|
||||
common.Log.Debug("GetCharMetrics 2: code=%d glyph=%q width=%.1f", code, glyph, metrics.Wx)
|
||||
return metrics, true
|
||||
}
|
||||
}
|
||||
}
|
||||
common.Log.Debug("GetCharMetrics 3: code=%d", code)
|
||||
return fonts.CharMetrics{}, false
|
||||
}
|
||||
|
||||
// GetAverageCharWidth returns the average width of all the characters in `font`.
|
||||
@ -170,7 +172,7 @@ func (font pdfFontSimple) GetAverageCharWidth() float64 {
|
||||
// • The value of BaseFont is derived differently.
|
||||
//
|
||||
func newSimpleFontFromPdfObject(d *core.PdfObjectDictionary, base *fontCommon,
|
||||
std14Encoder textencoding.TextEncoder) (*pdfFontSimple, error) {
|
||||
std14Encoder *textencoding.SimpleEncoder) (*pdfFontSimple, error) {
|
||||
font := pdfFontSimpleFromSkeleton(base)
|
||||
font.std14Encoder = std14Encoder
|
||||
|
||||
@ -187,7 +189,7 @@ func newSimpleFontFromPdfObject(d *core.PdfObjectDictionary, base *fontCommon,
|
||||
common.Log.Debug("ERROR: Invalid FirstChar type (%T)", obj)
|
||||
return nil, core.ErrTypeError
|
||||
}
|
||||
font.firstChar = int(intVal)
|
||||
firstChar := int(intVal)
|
||||
|
||||
obj = d.Get("LastChar")
|
||||
if obj == nil {
|
||||
@ -199,9 +201,9 @@ func newSimpleFontFromPdfObject(d *core.PdfObjectDictionary, base *fontCommon,
|
||||
common.Log.Debug("ERROR: Invalid LastChar type (%T)", obj)
|
||||
return nil, core.ErrTypeError
|
||||
}
|
||||
font.lastChar = int(intVal)
|
||||
lastChar := int(intVal)
|
||||
|
||||
font.charWidths = []float64{}
|
||||
font.charWidths = map[uint16]float64{}
|
||||
obj = d.Get("Widths")
|
||||
if obj != nil {
|
||||
font.Widths = obj
|
||||
@ -218,16 +220,15 @@ func newSimpleFontFromPdfObject(d *core.PdfObjectDictionary, base *fontCommon,
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(widths) != (font.lastChar - font.firstChar + 1) {
|
||||
if len(widths) != (lastChar - firstChar + 1) {
|
||||
common.Log.Debug("ERROR: Invalid widths length != %d (%d)",
|
||||
font.lastChar-font.firstChar+1, len(widths))
|
||||
lastChar-firstChar+1, len(widths))
|
||||
return nil, core.ErrRangeError
|
||||
}
|
||||
font.charWidths = widths
|
||||
for i, w := range widths {
|
||||
font.charWidths[uint16(firstChar+i)] = w
|
||||
}
|
||||
}
|
||||
if font.lastChar > 0 && len(font.charWidths) == 0 {
|
||||
common.Log.Debug("ERROR: No widths. font=%s", font)
|
||||
}
|
||||
|
||||
font.Encoding = core.TraceToDirectObject(d.Get("Encoding"))
|
||||
@ -250,9 +251,8 @@ func (font *pdfFontSimple) addEncoding() error {
|
||||
return err
|
||||
}
|
||||
base := font.baseFields()
|
||||
common.Log.Trace("addEncoding: BaseFont=%q Subtype=%q Encoding=%s (%T)", base.basefont,
|
||||
base.subtype, font.Encoding, font.Encoding)
|
||||
|
||||
common.Log.Trace("addEncoding: BaseFont=%q Subtype=%q Encoding=%s (%T) differences=%d %+v",
|
||||
base.basefont, base.subtype, font.Encoding, font.Encoding, len(differences), differences)
|
||||
encoder, err = textencoding.NewSimpleTextEncoder(baseEncoder, differences)
|
||||
if err != nil {
|
||||
return err
|
||||
@ -378,6 +378,7 @@ func NewPdfFontFromTTFFile(filePath string) (*PdfFont, error) {
|
||||
}
|
||||
|
||||
truefont := &pdfFontSimple{
|
||||
charWidths: map[uint16]float64{},
|
||||
fontCommon: fontCommon{
|
||||
subtype: "TrueType",
|
||||
},
|
||||
@ -387,8 +388,6 @@ func NewPdfFontFromTTFFile(filePath string) (*PdfFont, error) {
|
||||
// then can derive
|
||||
// TODO: Subsetting fonts.
|
||||
truefont.encoder = textencoding.NewWinAnsiTextEncoder()
|
||||
truefont.firstChar = minCode
|
||||
truefont.lastChar = maxCode
|
||||
|
||||
truefont.basefont = ttf.PostScriptName
|
||||
truefont.FirstChar = core.MakeInteger(minCode)
|
||||
@ -424,12 +423,15 @@ func NewPdfFontFromTTFFile(filePath string) (*PdfFont, error) {
|
||||
|
||||
truefont.Widths = core.MakeIndirectObject(core.MakeArrayFromFloats(vals))
|
||||
|
||||
if len(vals) < (255 - 32 + 1) {
|
||||
if len(vals) < maxCode-minCode+1 {
|
||||
common.Log.Debug("ERROR: Invalid length of widths, %d < %d", len(vals), 255-32+1)
|
||||
return nil, core.ErrRangeError
|
||||
}
|
||||
|
||||
truefont.charWidths = vals[:255-32+1]
|
||||
// truefont.charWidths = vals[:maxCode-minCode+1]
|
||||
for i := uint16(minCode); i <= maxCode; i++ {
|
||||
truefont.charWidths[i] = vals[i-minCode]
|
||||
}
|
||||
|
||||
// Use WinAnsiEncoding by default.
|
||||
truefont.Encoding = core.MakeName("WinAnsiEncoding")
|
||||
@ -511,31 +513,38 @@ func loadStandard14Font(baseFont Standard14Font) (pdfFontSimple, bool) {
|
||||
if !ok {
|
||||
return pdfFontSimple{}, false
|
||||
}
|
||||
|
||||
descriptor := builtinDescriptor(string(baseFont))
|
||||
if descriptor == nil {
|
||||
return pdfFontSimple{}, false
|
||||
}
|
||||
|
||||
std.std14Descriptor = descriptor
|
||||
se, ok := std.std14Encoder.(textencoding.SimpleEncoder)
|
||||
if !ok {
|
||||
common.Log.Debug("ERROR: Wrong encoder type: %T", std.std14Encoder)
|
||||
}
|
||||
codes := []int{}
|
||||
for c := range se.CodeToGlyph {
|
||||
codes = append(codes, int(c))
|
||||
}
|
||||
sort.Ints(codes)
|
||||
std.firstChar = codes[0]
|
||||
std.lastChar = codes[len(codes)-1]
|
||||
std.charWidths = make([]float64, len(codes))
|
||||
for i, code := range codes {
|
||||
glyph := se.CodeToGlyph[uint16(code)]
|
||||
std.charWidths[i] = std.fontMetrics[glyph].Wx
|
||||
}
|
||||
|
||||
return std, true
|
||||
}
|
||||
|
||||
func (font *pdfFontSimple) updateStandard14Font() {
|
||||
se, ok := font.Encoder().(*textencoding.SimpleEncoder)
|
||||
if !ok {
|
||||
// This can't happen.
|
||||
common.Log.Error("Wrong encoder type: %T. font=%s.", font.Encoder(), font)
|
||||
return
|
||||
}
|
||||
|
||||
codes := []uint16{}
|
||||
for c := range se.CodeToGlyph {
|
||||
codes = append(codes, c)
|
||||
}
|
||||
sort.Slice(codes, func(i, j int) bool { return codes[i] < codes[j] })
|
||||
|
||||
font.charWidths = map[uint16]float64{}
|
||||
for _, code := range codes {
|
||||
glyph := se.CodeToGlyph[uint16(code)]
|
||||
font.charWidths[code] = font.fontMetrics[glyph].Wx
|
||||
}
|
||||
}
|
||||
|
||||
var standard14Fonts = map[Standard14Font]pdfFontSimple{
|
||||
Courier: pdfFontSimple{
|
||||
fontCommon: fontCommon{
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user