xiaoqidun/ofdgo
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feat(渲染能力): 完善尖角限制与画刷继承
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xiaoqidun committed 2026-09-09 19:58:01 +08:00
1 parent 777d0c7c89
commit e5e07f92cd
7 files changed
+167 -142
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ofdgo_renderer_text.go
+22 -19
View File
@@ -15,7 +15,6 @@
package ofdgo
import (
"image/color"
"strings"
"github.com/tdewolff/canvas"
@@ -24,8 +23,8 @@ import (
const ptPerMM = 72.0 / 25.4
// 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, boundaryInCTM 边界是否参与父级CTM, parentClip 父级裁剪路径
func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64, defaultFill, defaultStroke color.Color, parentCTM *Matrix, boundaryInCTM bool, parentClip *canvas.Path) {
// 入参: ctx 画布上下文, obj 文本对象, pageH 页面高度, defaults 默认绘制参数, parentCTM 父级CTM, boundaryInCTM 边界是否参与父级CTM, parentClip 父级裁剪路径
func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64, defaults *DrawParam, parentCTM *Matrix, boundaryInCTM bool, parentClip *canvas.Path) {
if obj.Visible != nil && !*obj.Visible {
return
}
@@ -46,6 +45,10 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
if parentCTM != nil {
ctm = parentCTM.Multiply(ctm)
}
objectCTM := TranslationMatrix(bx, by).Multiply(ctm)
if boundaryInCTM && parentCTM != nil {
objectCTM = parentCTM.Multiply(TranslationMatrix(bx, by)).Multiply(localCTM)
}
clipPath := intersectClipPath(parentClip, r.buildObjectClipPath(obj.Clips, pageH, bx, by, localCTM, parentCTM, boundaryInCTM))
var dp *DrawParam
if obj.DrawParam != "" {
@@ -71,13 +74,13 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
sizeMM *= scale
}
sizePt := sizeMM * ptPerMM
fillColor := colorWithAlpha(defaultFill, obj.Alpha)
if fillColor == nil {
fillColor = colorWithAlpha(canvas.Black, obj.Alpha)
}
fillColor := colorWithAlpha(canvas.Black, obj.Alpha)
var fillPaint any = fillColor
var fillPattern *patternPaint
var fillColorNode *FillColor
if defaults != nil {
fillColorNode = defaults.FillColor
}
if dp != nil && dp.FillColor != nil {
fillColorNode = dp.FillColor
}
@@ -88,17 +91,19 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
fillColorNode = withFillAlpha(fillColorNode, obj.Alpha)
fillColor = r.parseFillColor(fillColorNode)
fillPaint = r.parseFillPaint(fillColorNode, bx, by, pageH)
fillPattern = r.parsePatternPaint(fillColorNode.Pattern, fillColorNode.Value, fillColorNode.Index, fillColorNode.ColorSpace, fillColorNode.Alpha)
fillPattern = parsePatternPaint(fillColorNode)
}
if fillPaint == nil {
fillPaint = fillColor
}
transformShdPaint(fillPaint, parentCTM, bx, by, pageH, boundaryInCTM)
fillPaint, shadingClip, fillView := resolveShdPaint(ctx, fillPaint)
fillClip := intersectClipPath(clipPath, shadingClip)
strokeStyle := newPathStyle(nil, defaultStroke, 0, obj.Alpha)
var strokeStyle pathStyle
strokeClip := clipPath
strokeView := canvas.Identity
if shouldStroke {
strokeStyle = r.newPathStyle(defaults, bx, by, pageH, obj.Alpha)
if dp != nil {
strokeStyle.applyDrawParam(r, dp, bx, by, pageH, obj.Alpha)
}
@@ -108,17 +113,15 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
if obj.LineWidth > 0 {
strokeStyle.lineWidth = obj.LineWidth
}
strokeStyle.applyLineJoin(obj.Join, obj.MiterLimit)
if strokeStyle.strokePaint == nil {
strokeStyle.strokePaint = colorWithAlpha(canvas.Black, obj.Alpha)
}
strokeStyle.scale(ctm)
transformShdPaint(strokeStyle.strokePaint, parentCTM, bx, by, pageH, boundaryInCTM)
strokeStyle.strokePaint, shadingClip, strokeView = resolveShdPaint(ctx, strokeStyle.strokePaint)
strokeClip = intersectClipPath(strokeClip, shadingClip)
}
patternCTM := TranslationMatrix(bx, by).Multiply(ctm)
if boundaryInCTM && parentCTM != nil {
patternCTM = parentCTM.Multiply(TranslationMatrix(bx, by)).Multiply(localCTM)
}
fontStyle := canvas.FontRegular
weight := obj.Weight
if weight == 0 && dp != nil && dp.Weight > 0 {
@@ -247,7 +250,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
path := glyphPath.Copy().Transform(transform.Scale(scaleX, 1))
if shouldFill && fillPattern != nil {
r.renderPattern(ctx, fillPattern, pageH, applyClipPath(path.Copy(), fillClip), patternCTM)
r.renderPattern(ctx, fillPattern, pageH, applyClipPath(path.Copy(), fillClip), objectCTM)
} else if shouldFill && fillPaint != nil {
ctx.SetFill(fillPaint)
ctx.SetStrokeColor(canvas.Transparent)
@@ -259,7 +262,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
path = path.Stroke(strokeStyle.lineWidth, strokeStyle.lineCap, strokeStyle.lineJoin, canvas.Tolerance)
path = applyClipPath(path, strokeClip)
if strokeStyle.strokePattern != nil {
r.renderPattern(ctx, strokeStyle.strokePattern, pageH, path, patternCTM)
r.renderPattern(ctx, strokeStyle.strokePattern, pageH, path, objectCTM)
} else {
ctx.SetFill(strokeStyle.strokePaint)
ctx.SetStrokeColor(canvas.Transparent)
@@ -271,12 +274,12 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
underline.LineTo(glyphWidth*scaleX, -sizeMM*0.1)
underline = underline.Stroke(sizeMM*0.05, canvas.ButtCap, canvas.MiterJoin, canvas.Tolerance)
if shouldFill && fillPattern != nil {
r.renderPattern(ctx, fillPattern, pageH, applyClipPath(underline.Transform(transform), clipPath), patternCTM)
r.renderPattern(ctx, fillPattern, pageH, applyClipPath(underline.Transform(transform), clipPath), objectCTM)
} else if shouldFill {
ctx.SetFillColor(fillColor)
ctx.DrawPath(0, 0, applyClipPath(underline.Transform(transform), clipPath))
} else if strokeStyle.strokePattern != nil {
r.renderPattern(ctx, strokeStyle.strokePattern, pageH, applyClipPath(underline.Transform(transform), strokeClip), patternCTM)
r.renderPattern(ctx, strokeStyle.strokePattern, pageH, applyClipPath(underline.Transform(transform), strokeClip), objectCTM)
} else {
drawShdPath(ctx, applyClipPath(underline.Transform(transform), strokeClip), strokeView)
}
@@ -297,7 +300,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
glyphPath = applyClipPath(glyphPath.Copy().Transform(textTransform.Scale(scaleX, 1)), fillClip)
if fillPattern != nil {
r.renderPattern(ctx, fillPattern, pageH, glyphPath, patternCTM)
r.renderPattern(ctx, fillPattern, pageH, glyphPath, objectCTM)
} else {
drawShdPath(ctx, glyphPath, fillView)
}
@@ -310,7 +313,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
underline = underline.Stroke(uw, canvas.ButtCap, canvas.MiterJoin, canvas.Tolerance)
underline = applyClipPath(underline.Transform(textTransform), clipPath)
if fillPattern != nil {
r.renderPattern(ctx, fillPattern, pageH, underline, patternCTM)
r.renderPattern(ctx, fillPattern, pageH, underline, objectCTM)
} else {
ctx.SetFillColor(fillColor)
ctx.SetStrokeColor(canvas.Transparent)