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feat(渲染优化): 完善渲染逻辑
build.yaml / build (push) Successful in 34s
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xiaoqidun
2026-07-16 11:15:29 +08:00
parent bc02d9e7f6
commit 6aa4e99530
5 changed files with 288 additions and 39 deletions
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ofdgo_renderer_text.go
+31 -3
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@@ -24,8 +24,8 @@ 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
func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64, defaultFill, defaultStroke color.Color, parentCTM *Matrix, boundaryInCTM bool) {
// 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) {
if obj.Visible != nil && !*obj.Visible {
return
}
@@ -41,6 +41,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
if parentCTM != nil {
ctm = parentCTM.Multiply(ctm)
}
clipPath := intersectClipPath(parentClip, r.buildClipPath(obj.Clips, pageH, bx, by, ctm))
var dp *DrawParam
if obj.DrawParam != "" {
dp = r.getDrawParam(obj.DrawParam, nil)
@@ -115,6 +116,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
ff := r.loadFont(fontID)
if ff == nil {
ctx.Pop()
return
}
face := ff.Face(sizePt, fillPaint, fontStyle, canvas.FontNormal)
@@ -134,7 +136,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
dxs, dys := parseFloats(tc.DeltaX), parseFloats(tc.DeltaY)
xs, ys := parseFloats(tc.X), parseFloats(tc.Y)
drawAsPath := embeddedFont || textCodePositioned(tc, xs, ys)
drawAsPath := embeddedFont || textCodePositioned(tc, xs, ys) || clipPath != nil
cx, cy := 0.0, 0.0
if len(xs) > 0 {
cx = xs[0]
@@ -185,6 +187,32 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
advanceLimit := textGlyphAdvanceLimit(dxs, dys, xs, i, len(glyphs), cx)
if glyphFillPaint != nil {
ctx.SetFill(glyphFillPaint)
if clipPath != nil {
scaleX := hScale
if advanceLimit > 0 && glyphWidth*scaleX > advanceLimit {
scaleX = advanceLimit / glyphWidth
}
textWidth = glyphWidth * scaleX
textTransform := canvas.Identity.Translate(canvasX, canvasY)
if useTextMatrix {
textTransform = textTransform.Mul(textMatrix(ctm))
}
glyphPath = applyClipPath(glyphPath.Copy().Transform(textTransform.Scale(scaleX, 1)), clipPath)
ctx.DrawPath(0, 0, glyphPath)
if hasUnderline {
uw := sizeMM * 0.05
off := sizeMM * 0.1
underline := &canvas.Path{}
underline.MoveTo(0, -off)
underline.LineTo(textWidth, -off)
underline = underline.Stroke(uw, canvas.ButtCap, canvas.MiterJoin, canvas.Tolerance)
underline = applyClipPath(underline.Transform(textTransform), clipPath)
ctx.SetFillColor(fillColor)
ctx.SetStrokeColor(canvas.Transparent)
ctx.DrawPath(0, 0, underline)
}
continue
}
drawGlyph := func(x, y float64) {
if drawAsGlyphPath {
scaleX := hScale