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style(代码风格): 整理声明顺序与字体模块
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xiaoqidun committed 2026-09-28 15:17:45 +08:00
1 parent 5e0da3da28
commit ee6c9f6a16
82 files changed
+4316 -4310
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ofdgo_renderer_measure_canvas.go
+72 -72
View File
@@ -21,6 +21,13 @@ import (
"github.com/tdewolff/canvas"
)
// boundsRenderer 收集绘制范围，不分配页面像素或合并独立图形轮廓
type boundsRenderer struct {
box Box
collect bool
contours []ObjectContour
}
// MeasureObject 使用默认解释器度量对象，不分配页面像素
// 入参: r 渲染器, object 图形对象, options 度量上下文
// 返回: ObjectMeasurement 度量结果, error 错误信息
@@ -85,84 +92,12 @@ func (CanvasBackend) MeasureObject(r *Renderer, object GraphicObject, options Me
return ObjectMeasurement{Bounds: bounds.box, Contours: bounds.contours}, renderer.renderError
}
// measureImage 复用图片变换与裁剪语义度量范围，不读取像素数据
// 入参: ctx 度量画布, obj 图片, pageH 页面高度, parentCTM 父变换, boundaryInCTM 边界是否参与变换, parentClip 父裁剪
func (r *Renderer) measureImage(ctx *canvas.Context, obj ImageObject, pageH float64, parentCTM *Matrix, boundaryInCTM bool, parentClip *canvas.Path) {
if obj.Visible != nil && !*obj.Visible || obj.Alpha != nil && *obj.Alpha == 0 {
return
}
box, _ := ParseBox(obj.Boundary)
ctm := NewMatrix(obj.CTM)
if obj.CTM == "" {
ctm = Matrix{a: box.W, d: box.H}
}
m := TranslationMatrix(box.X, box.Y).Multiply(ctm)
if parentCTM != nil {
if boundaryInCTM {
m = parentCTM.Multiply(m)
} else {
m = TranslationMatrix(box.X, box.Y).Multiply(*parentCTM).Multiply(ctm)
}
}
p := canvas.Rectangle(1, 1).Transform(canvas.Matrix{{m.a, m.c, m.e}, {-m.b, -m.d, pageH - m.f}})
clip := intersectClipPath(parentClip, r.buildObjectClipPath(obj.Clips, pageH, box.X, box.Y, ctm, parentCTM, boundaryInCTM))
ctx.Renderer.(*boundsRenderer).add(applyClipPath(p, clip))
if obj.Border != nil {
border := *obj.Border
border.BorderColor = (*StrokeColor)(boundsColor((*FillColor)(border.BorderColor)))
obj.Border = &border
r.renderImageBorder(ctx, obj, box, pageH, parentCTM, boundaryInCTM, clip)
}
}
// boundsColor 以底纹的基础颜色和透明度度量轮廓，不修改原画刷
// 入参: color 填充或描边颜色
// 返回: *FillColor 用于度量的颜色
func boundsColor(color *FillColor) *FillColor {
if color == nil || color.Pattern == nil {
return color
}
return &FillColor{Value: color.Value, Index: color.Index, ColorSpace: color.ColorSpace, Alpha: color.Alpha}
}
// boundsRenderer 收集绘制范围，不分配页面像素或合并独立图形轮廓
type boundsRenderer struct {
box Box
collect bool
contours []ObjectContour
}
// Size 返回不限定边界的度量画布尺寸
// 返回: float64 宽度, float64 高度
func (r *boundsRenderer) Size() (float64, float64) {
return 0, 0
}
// add 合并路径的精确曲线范围并转换为向下的纵轴
// 入参: path 绘制路径
func (r *boundsRenderer) add(path *canvas.Path) {
r.addContour(path, false)
}
// addContour 合并范围并按需保留独立填充区域
// 入参: path 绘制路径, evenOdd 是否使用奇偶规则
func (r *boundsRenderer) addContour(path *canvas.Path, evenOdd bool) {
if path.Empty() {
return
}
rect := path.Bounds()
r.box = unionTextBox(r.box, Box{X: rect.X0, Y: -rect.Y1, W: rect.W(), H: rect.H()})
if r.collect {
outline := &canvas.Path{}
for _, subpath := range path.Split() {
subpath = subpath.Copy()
subpath.Close()
outline = outline.Append(subpath)
}
r.contours = append(r.contours, ObjectContour{Path: outline.Transform(canvas.Matrix{{1, 0, 0}, {0, -1, 0}}).ToSVG(), EvenOdd: evenOdd})
}
}
// RenderPath 收集填充与描边范围，保持线帽、连接和虚线语义
// 入参: path 路径, style 绘制样式, m 变换矩阵
func (r *boundsRenderer) RenderPath(path *canvas.Path, style canvas.Style, m canvas.Matrix) {
@@ -203,6 +138,71 @@ func (CanvasBackend) PageText(r *Renderer, page *PageContent) (*PageText, error)
return renderer.pageText, nil
}
// measureImage 复用图片变换与裁剪语义度量范围，不读取像素数据
// 入参: ctx 度量画布, obj 图片, pageH 页面高度, parentCTM 父变换, boundaryInCTM 边界是否参与变换, parentClip 父裁剪
func (r *Renderer) measureImage(ctx *canvas.Context, obj ImageObject, pageH float64, parentCTM *Matrix, boundaryInCTM bool, parentClip *canvas.Path) {
if obj.Visible != nil && !*obj.Visible || obj.Alpha != nil && *obj.Alpha == 0 {
return
}
box, _ := ParseBox(obj.Boundary)
ctm := NewMatrix(obj.CTM)
if obj.CTM == "" {
ctm = Matrix{a: box.W, d: box.H}
}
m := TranslationMatrix(box.X, box.Y).Multiply(ctm)
if parentCTM != nil {
if boundaryInCTM {
m = parentCTM.Multiply(m)
} else {
m = TranslationMatrix(box.X, box.Y).Multiply(*parentCTM).Multiply(ctm)
}
}
p := canvas.Rectangle(1, 1).Transform(canvas.Matrix{{m.a, m.c, m.e}, {-m.b, -m.d, pageH - m.f}})
clip := intersectClipPath(parentClip, r.buildObjectClipPath(obj.Clips, pageH, box.X, box.Y, ctm, parentCTM, boundaryInCTM))
ctx.Renderer.(*boundsRenderer).add(applyClipPath(p, clip))
if obj.Border != nil {
border := *obj.Border
border.BorderColor = (*StrokeColor)(boundsColor((*FillColor)(border.BorderColor)))
obj.Border = &border
r.renderImageBorder(ctx, obj, box, pageH, parentCTM, boundaryInCTM, clip)
}
}
// boundsColor 以底纹的基础颜色和透明度度量轮廓，不修改原画刷
// 入参: color 填充或描边颜色
// 返回: *FillColor 用于度量的颜色
func boundsColor(color *FillColor) *FillColor {
if color == nil || color.Pattern == nil {
return color
}
return &FillColor{Value: color.Value, Index: color.Index, ColorSpace: color.ColorSpace, Alpha: color.Alpha}
}
// add 合并路径的精确曲线范围并转换为向下的纵轴
// 入参: path 绘制路径
func (r *boundsRenderer) add(path *canvas.Path) {
r.addContour(path, false)
}
// addContour 合并范围并按需保留独立填充区域
// 入参: path 绘制路径, evenOdd 是否使用奇偶规则
func (r *boundsRenderer) addContour(path *canvas.Path, evenOdd bool) {
if path.Empty() {
return
}
rect := path.Bounds()
r.box = unionTextBox(r.box, Box{X: rect.X0, Y: -rect.Y1, W: rect.W(), H: rect.H()})
if r.collect {
outline := &canvas.Path{}
for _, subpath := range path.Split() {
subpath = subpath.Copy()
subpath.Close()
outline = outline.Append(subpath)
}
r.contours = append(r.contours, ObjectContour{Path: outline.Transform(canvas.Matrix{{1, 0, 0}, {0, -1, 0}}).ToSVG(), EvenOdd: evenOdd})
}
}
// textPathBox 将字形轮廓转换为页面区域
// 入参: path 字形轮廓, pageH 页面高度
// 返回: Box 字符区域