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feat(渲染注释): 渲染注释，可配置不渲染

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This commit is contained in:
xiaoqidun
2026-06-26 11:26:09 +08:00
parent 1446705bb6
commit 94fa027446
8 changed files with 283 additions and 19 deletions
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ofdgo_renderer.go
+49 -14
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@@ -38,6 +38,7 @@ import (
type Renderer struct {
Reader *Reader
DPI float64
RenderAnnotations bool
fontFamily *canvas.FontFamily
DrawParams map[string]*DrawParam
CompositeGraphicUnits map[string]*CompositeGraphicUnit
@@ -127,6 +128,9 @@ func (r *Renderer) renderPageToContext(ctx *canvas.Context, page *PageContent, d
}
}
}
if r.RenderAnnotations {
r.renderAnnotations(ctx, page.ID, pageH)
}
if stamps, ok := r.Reader.Stamps[page.ID]; ok {
for _, stamp := range stamps {
r.renderStamp(ctx, stamp, pageH)
@@ -232,6 +236,21 @@ func (r *Renderer) RenderToMultiPagePDF(writer io.Writer) error {
return p.Close()
}
// renderAnnotations 渲染页面注释外观
// 入参: ctx 画布上下文, pageID 页面ID, pageH 页面高度
func (r *Renderer) renderAnnotations(ctx *canvas.Context, pageID string, pageH float64) {
for _, annot := range r.Reader.Annots[pageID] {
if strings.EqualFold(annot.Type, "Link") || len(annot.Appearance.Objects) == 0 {
continue
}
box, _ := ParseBox(annot.Appearance.Boundary)
ctm := Matrix{a: 1, d: 1, e: box.X, f: box.Y}
for _, obj := range annot.Appearance.Objects {
r.renderObject(ctx, obj, pageH, nil, nil, 0, &ctm)
}
}
}
// renderTemplate 渲染模板
// 入参: ctx 画布上下文, templateID 模板ID, pageH 页面高度
func (r *Renderer) renderTemplate(ctx *canvas.Context, templateID string, pageH float64) {
@@ -295,6 +314,9 @@ func (r *Renderer) renderLayer(ctx *canvas.Context, layer Layer, pageH float64,
// renderCompositeGraphicUnit 渲染复合图元
// 入参: ctx 画布上下文, cgu 复合图元对象, pageH 页面高度, defaultFill 默认填充色, defaultStroke 默认描边色, defaultLW 默认线宽, parentCTM 父级CTM
func (r *Renderer) renderCompositeGraphicUnit(ctx *canvas.Context, cgu CompositeGraphicUnit, pageH float64, defaultFill, defaultStroke color.Color, defaultLW float64, parentCTM *Matrix) {
if cgu.Visible != nil && !*cgu.Visible {
return
}
ctx.Push()
currentCTM := NewMatrix(cgu.CTM)
if parentCTM != nil {
@@ -432,6 +454,9 @@ func (r *Renderer) initCommon() {
// renderImage 渲染图片
// 入参: ctx 画布上下文, obj 图片对象, pageH 页面高度, parentCTM 父级CTM
func (r *Renderer) renderImage(ctx *canvas.Context, obj ImageObject, pageH float64, parentCTM *Matrix) {
if obj.Visible != nil && !*obj.Visible {
return
}
resPath, ok := r.Reader.ResMap[obj.ResourceID]
if !ok {
return
@@ -470,6 +495,9 @@ func (r *Renderer) renderImage(ctx *canvas.Context, obj ImageObject, pageH float
// renderPath 渲染路径
// 入参: ctx 画布上下文, obj 路径对象, pageH 页面高度, defaultFill 默认填充色, defaultStroke 默认描边色, defaultLW 默认线宽, parentCTM 父级CTM
func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64, defaultFill, defaultStroke color.Color, defaultLW float64, parentCTM *Matrix) {
if obj.Visible != nil && !*obj.Visible {
return
}
ctx.Push()
bx, by := 0.0, 0.0
if obj.Boundary != "" {
@@ -499,12 +527,14 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
lineWidth = dp.LineWidth
}
if dp.FillColor != nil {
fillColor = parseFillColor(dp.FillColor)
fillPaint = parseFillPaint(dp.FillColor, bx, by, pageH, 0, 0)
fillColorNode := withFillAlpha(dp.FillColor, obj.Alpha)
fillColor = parseFillColor(fillColorNode)
fillPaint = parseFillPaint(fillColorNode, bx, by, pageH, 0, 0)
}
if dp.StrokeColor != nil {
strokeColor = parseStrokeColor(dp.StrokeColor)
strokePaint = parseStrokePaint(dp.StrokeColor, bx, by, pageH, 0, 0)
strokeColorNode := withStrokeAlpha(dp.StrokeColor, obj.Alpha)
strokeColor = parseStrokeColor(strokeColorNode)
strokePaint = parseStrokePaint(strokeColorNode, bx, by, pageH, 0, 0)
}
if dp.Cap == "Round" {
lineCap = canvas.RoundCap
@@ -526,12 +556,14 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
lineWidth = obj.LineWidth
}
if obj.FillColor != nil {
fillColor = parseFillColor(obj.FillColor)
fillPaint = parseFillPaint(obj.FillColor, bx, by, pageH, 0, 0)
fillColorNode := withFillAlpha(obj.FillColor, obj.Alpha)
fillColor = parseFillColor(fillColorNode)
fillPaint = parseFillPaint(fillColorNode, bx, by, pageH, 0, 0)
}
if obj.StrokeColor != nil {
strokeColor = parseStrokeColor(obj.StrokeColor)
strokePaint = parseStrokePaint(obj.StrokeColor, bx, by, pageH, 0, 0)
strokeColorNode := withStrokeAlpha(obj.StrokeColor, obj.Alpha)
strokeColor = parseStrokeColor(strokeColorNode)
strokePaint = parseStrokePaint(strokeColorNode, bx, by, pageH, 0, 0)
}
if obj.Cap != "" {
if obj.Cap == "Round" {
@@ -624,6 +656,9 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
// renderText 渲染文本
// 入参: ctx 画布上下文, obj 文本对象, pageH 页面高度, defaultFill 默认填充色, defaultStroke 默认描边色, parentCTM 父级CTM
func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64, defaultFill, defaultStroke color.Color, parentCTM *Matrix) {
if obj.Visible != nil && !*obj.Visible {
return
}
ctx.Push()
bx, by := 0.0, 0.0
if obj.Boundary != "" {
@@ -662,14 +697,14 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
var fillPaint any = fillColor
var fillColorNode *FillColor
if dp != nil && dp.FillColor != nil {
fillColor = parseFillColor(dp.FillColor)
fillColorNode = dp.FillColor
fillPaint = parseFillPaint(dp.FillColor, bx, by, pageH, 0, 0)
fillColorNode = withFillAlpha(dp.FillColor, obj.Alpha)
fillColor = parseFillColor(fillColorNode)
fillPaint = parseFillPaint(fillColorNode, bx, by, pageH, 0, 0)
}
if obj.FillColor != nil {
fillColor = parseFillColor(obj.FillColor)
fillColorNode = obj.FillColor
fillPaint = parseFillPaint(obj.FillColor, bx, by, pageH, 0, 0)
fillColorNode = withFillAlpha(obj.FillColor, obj.Alpha)
fillColor = parseFillColor(fillColorNode)
fillPaint = parseFillPaint(fillColorNode, bx, by, pageH, 0, 0)
}
if fillPaint == nil {
fillPaint = fillColor