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refactor(重构代码): 提升代码质量
build.yaml / build (push) Successful in 34s
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xiaoqidun
2026-07-09 10:33:21 +08:00
parent 92a53ed3ad
commit fa3260c108
5 changed files with 102 additions and 126 deletions
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ofdgo_renderer.go
+32 -93
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@@ -29,8 +29,6 @@ import (
"github.com/tdewolff/canvas/renderers"
"github.com/tdewolff/canvas/renderers/pdf"
"github.com/tdewolff/canvas/renderers/rasterizer"
_ "github.com/xiaoqidun/jbig2"
_ "golang.org/x/image/bmp"
)
// Renderer 渲染器实现
@@ -306,19 +304,7 @@ func (r *Renderer) renderTemplate(ctx *canvas.Context, templateID string, pageH
// renderLayer 渲染图层
// 入参: ctx 画布上下文, layer 图层对象, 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) renderLayer(ctx *canvas.Context, layer Layer, pageH float64, defaultFill, defaultStroke color.Color, defaultLW float64, parentCTM *Matrix) {
if layer.DrawParam != "" {
if dp := r.getDrawParam(layer.DrawParam, nil); dp != nil {
if dp.LineWidth > 0 {
defaultLW = dp.LineWidth
}
if dp.FillColor != nil {
defaultFill = parseFillColor(dp.FillColor)
}
if dp.StrokeColor != nil {
defaultStroke = parseStrokeColor(dp.StrokeColor)
}
}
}
defaultFill, defaultStroke, defaultLW = r.drawParamDefaults(layer.DrawParam, defaultFill, defaultStroke, defaultLW)
if len(layer.Objects) > 0 {
for _, obj := range layer.Objects {
r.renderObject(ctx, obj, pageH, defaultFill, defaultStroke, defaultLW, parentCTM, false)
@@ -357,19 +343,7 @@ func (r *Renderer) renderCompositeGraphicUnit(ctx *canvas.Context, cgu Composite
r.renderCompositeGraphicUnit(ctx, refCopy, pageH, defaultFill, defaultStroke, defaultLW, &currentCTM, true)
}
}
if cgu.DrawParam != "" {
if dp := r.getDrawParam(cgu.DrawParam, nil); dp != nil {
if dp.LineWidth > 0 {
defaultLW = dp.LineWidth
}
if dp.FillColor != nil {
defaultFill = parseFillColor(dp.FillColor)
}
if dp.StrokeColor != nil {
defaultStroke = parseStrokeColor(dp.StrokeColor)
}
}
}
defaultFill, defaultStroke, defaultLW = r.drawParamDefaults(cgu.DrawParam, defaultFill, defaultStroke, defaultLW)
if len(cgu.Objects) > 0 {
for _, obj := range cgu.Objects {
obj = mergeGraphicObjectAlpha(obj, cgu.Alpha)
@@ -432,6 +406,29 @@ func mergeGraphicObjectAlpha(obj GraphicObject, alpha *int) GraphicObject {
return obj
}
// drawParamDefaults 合并绘制参数默认样式
// 入参: id 绘制参数ID, defaultFill 默认填充色, defaultStroke 默认描边色, defaultLW 默认线宽
// 返回: color.Color 默认填充色, color.Color 默认描边色, float64 默认线宽
func (r *Renderer) drawParamDefaults(id string, defaultFill, defaultStroke color.Color, defaultLW float64) (color.Color, color.Color, float64) {
if id == "" {
return defaultFill, defaultStroke, defaultLW
}
dp := r.getDrawParam(id, nil)
if dp == nil {
return defaultFill, defaultStroke, defaultLW
}
if dp.LineWidth > 0 {
defaultLW = dp.LineWidth
}
if dp.FillColor != nil {
defaultFill = parseFillColor(dp.FillColor)
}
if dp.StrokeColor != nil {
defaultStroke = parseStrokeColor(dp.StrokeColor)
}
return defaultFill, defaultStroke, defaultLW
}
// getDrawParam 获取绘制参数逻辑
// 入参: id 参数ID, visited 访问记录
// 返回: *DrawParam 绘制参数
@@ -744,16 +741,6 @@ func (r *Renderer) renderPattern(ctx *canvas.Context, pattern *Pattern, defaultC
}
}
// patternColor 获取图案单元默认颜色
// 入参: fillColor 填充颜色节点
// 返回: color.Color 默认颜色
func patternColor(fillColor *FillColor) color.Color {
if fillColor == nil || strings.TrimSpace(fillColor.Value) == "" {
return nil
}
return parseColorWithAlpha(fillColor.Value, fillColor.Alpha)
}
// 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) {
@@ -850,6 +837,8 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
face := ff.Face(sizePt, fillPaint, fontStyle, canvas.FontNormal)
glyphTransforms := r.textObjectGlyphTransforms(fontID, obj)
hasUnderline := strings.Contains(obj.Decoration, "Underline")
useGlyphFillPaint := fillColorNode != nil && fillColorNode.AxialShd != nil
codePos := 0
for _, tc := range obj.TextCode {
var runes []rune
@@ -863,7 +852,7 @@ 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)
drawAsPath := embeddedFont || textCodePositioned(tc, xs, ys)
cx, cy := 0.0, 0.0
if len(xs) > 0 {
cx = xs[0]
@@ -900,7 +889,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
textWidth := textGlyphWidth(face, glyph) * hScale
glyphFillPaint := fillPaint
if fillColorNode != nil && fillColorNode.AxialShd != nil {
if useGlyphFillPaint {
glyphFillPaint = parseFillPaint(fillColorNode, bx, by, pageH, canvasX, canvasY)
}
advanceLimit := textGlyphAdvanceLimit(dxs, dys, xs, i, len(glyphs), cx)
@@ -932,7 +921,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
x, y = 0, 0
}
textFace := face
if fillColorNode != nil && fillColorNode.AxialShd != nil {
if useGlyphFillPaint {
textFace = ff.Face(sizePt, glyphFillPaint, fontStyle, canvas.FontNormal)
}
text := canvas.NewTextLine(textFace, str, canvas.Left)
@@ -947,7 +936,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
ctx.Translate(canvasX, canvasY)
ctx.ComposeView(textMatrix(ctm))
drawGlyph(0, 0)
if strings.Contains(obj.Decoration, "Underline") {
if hasUnderline {
uw := sizeMM * 0.05
ctx.SetStrokeWidth(uw)
ctx.SetStrokeColor(fillColor)
@@ -961,7 +950,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
}
drawGlyph(canvasX, canvasY)
}
if strings.Contains(obj.Decoration, "Underline") {
if hasUnderline {
uw := sizeMM * 0.05
ctx.SetStrokeWidth(uw)
ctx.SetStrokeColor(fillColor)
@@ -976,24 +965,6 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
ctx.Pop()
}
// hasTextMatrix 判断文本是否需要应用字形变换
// 入参: ctm 变换矩阵
// 返回: bool 是否需要变换
func hasTextMatrix(ctm Matrix) bool {
const eps = 1e-9
return math.Abs(ctm.a-1) > eps || math.Abs(ctm.b) > eps || math.Abs(ctm.c) > eps || math.Abs(ctm.d-1) > eps
}
// textMatrix 获取文本字形变换矩阵
// 入参: ctm OFD变换矩阵
// 返回: canvas.Matrix 画布变换矩阵
func textMatrix(ctm Matrix) canvas.Matrix {
return canvas.Matrix{
{ctm.a, -ctm.c, 0},
{-ctm.b, ctm.d, 0},
}
}
// renderStamp 渲染印章
// 入参: ctx 画布上下文, s 印章对象, pageH 页面高度
func (r *Renderer) renderStamp(ctx *canvas.Context, s Stamp, pageH float64) {
@@ -1239,35 +1210,3 @@ func (r *Renderer) buildTinyFillRectPath(obj PathObject, pageH float64, ctm Matr
p.Close()
return p
}
// parseIndexRunes 解析索引字形
// 入参: indexStr 索引字符串, fontID 字体ID
// 返回: []rune 字形列表
func (r *Renderer) parseIndexRunes(indexStr string, fontID string) []rune {
var gids []int
parts := strings.Fields(indexStr)
for _, p := range parts {
if strings.Contains(p, "-") {
sub := strings.Split(p, "-")
if len(sub) == 2 {
start, _ := strconv.Atoi(sub[0])
end, _ := strconv.Atoi(sub[1])
for k := start; k <= end; k++ {
gids = append(gids, k)
}
}
} else {
val, _ := strconv.Atoi(p)
gids = append(gids, val)
}
}
var res []rune
for _, gid := range gids {
if rVal, ok := r.fontGlyphRune(fontID, gid); ok {
res = append(res, rVal)
continue
}
res = append(res, rune(gid))
}
return res
}