feat(渲染能力): 支持椭圆渐变，修正虚线长度及短线显示

ofdgo_font.go

@@ -49,9 +49,9 @@ func FixFontDataAggressive(data []byte, fixCmap, fixName bool) (bool, []byte, ma
 	return fixed, newData, mapping, mc, err
 }
 
-// isBareCFFData 检查是否为 CFF 裸字体数据
+// isBareCFFData 检查是否为CFF裸字体数据
 // 入参: data 字体数据
-// 返回: bool 是否为 CFF 裸数据
+// 返回: bool 是否为CFF裸数据
 func isBareCFFData(data []byte) bool {
 	if len(data) < 4 {
 		return false

ofdgo_font_cff.go

@@ -26,7 +26,7 @@ import (
 	"golang.org/x/text/encoding/simplifiedchinese"
 )
 
-// wrapCFFToOTF 将 CFF 裸数据包装为 OpenType 字体格式
+// wrapCFFToOTF 将CFF裸数据包装为OpenType字体格式
 // 入参: cffData CFF字体数据
 // 返回: []byte OTF字体数据, map[rune]uint16 字符映射, error 错误信息
 func wrapCFFToOTF(cffData []byte) ([]byte, map[rune]uint16, error) {
@@ -79,7 +79,7 @@ func wrapCFFToOTF(cffData []byte) ([]byte, map[rune]uint16, error) {
 	return data, mapping, err
 }
 
-// cffDict 使用 float64 存储所有数值，以统一处理整数和实数
+// cffDict 使用float64存储所有数值，以统一处理整数和实数
 type cffDict map[int][]float64
 
 // sanitizeCFF 尝试清洗CFF数据，转换CID字体并合并FontMatrix
@@ -246,7 +246,7 @@ func sanitizeCFF(data []byte) ([]byte, error) {
 	return newCFF.Bytes(), nil
 }
 
-// sanitizeMultiFDCFF 清洗多 FD 的 CID CFF 数据
+// sanitizeMultiFDCFF 清洗多FD的CID CFF数据
 // 入参: data 原始CFF数据, hdrSize 头部大小, nameIndexData 名称索引, topDict 顶层字典
 // 入参: stringIndexData 字符串索引, globalSubrIndexData 全局子程序索引, fdArrOff FDArray偏移, fdCount FD数量
 // 返回: []byte 清洗后的CFF数据, error 错误信息
@@ -332,7 +332,7 @@ func sanitizeMultiFDCFF(data []byte, hdrSize int, nameIndexData []byte, topDict
 	return newCFF.Bytes(), nil
 }
 
-// parseCFFAndCountGlyphs 解析 CFF 头部并统计字形数量
+// parseCFFAndCountGlyphs 解析CFF头部并统计字形数量
 // 入参: data CFF数据
 // 返回: int 字形数量, error 错误信息
 func parseCFFAndCountGlyphs(data []byte) (int, error) {
@@ -370,7 +370,7 @@ func parseCFFAndCountGlyphs(data []byte) (int, error) {
 	return 0, fmt.Errorf("failed to parse top dict")
 }
 
-// multiplyAffine 2x3 仿射矩阵乘法
+// multiplyAffine 2x3仿射矩阵乘法
 // 入参: a 矩阵A, b 矩阵B
 // 返回: []float64 结果矩阵
 func multiplyAffine(a, b []float64) []float64 {
@@ -384,7 +384,7 @@ func multiplyAffine(a, b []float64) []float64 {
 	}
 }
 
-// parseCFFDict 解析 CFF 字典数据
+// parseCFFDict 解析CFF字典数据
 // 入参: data 字典数据
 // 返回: cffDict 解析后的字典映射
 func parseCFFDict(data []byte) cffDict {
@@ -442,7 +442,7 @@ func parseCFFDict(data []byte) cffDict {
 	return dict
 }
 
-// parseCFFReal 解析 CFF 实数编码
+// parseCFFReal 解析CFF实数编码
 // 入参: data 数据切片
 // 返回: string 实数字符串, int 消耗字节数
 func parseCFFReal(data []byte) (string, int) {
@@ -478,7 +478,7 @@ func parseCFFReal(data []byte) (string, int) {
 	return sb.String(), i
 }
 
-// encodeCFFDict 编码 CFF 字典 (仅使用 float64 操作数)
+// encodeCFFDict 编码CFF字典 (仅使用float64操作数)
 // 入参: dict CFF字典映射
 // 返回: []byte 编码后的字典数据
 func encodeCFFDict(dict cffDict) []byte {
@@ -503,7 +503,7 @@ func encodeCFFDict(dict cffDict) []byte {
 	return buf.Bytes()
 }
 
-// encodeNumberCFF 编码单个数值到 CFF 格式
+// encodeNumberCFF 编码单个数值到CFF格式
 // 入参: buf 缓冲区, val 数值
 func encodeNumberCFF(buf *bytes.Buffer, val float64) {
 	if val == math.Trunc(val) {
@@ -557,7 +557,7 @@ func encodeNumberCFF(buf *bytes.Buffer, val float64) {
 	}
 }
 
-// encodeCFFIndex 编码 CFF 索引结构
+// encodeCFFIndex 编码CFF索引结构
 // 入参: items 数据项列表
 // 返回: []byte 编码后的索引数据
 func encodeCFFIndex(items []([]byte)) []byte {
@@ -602,7 +602,7 @@ func putOffset(buf *bytes.Buffer, val int, size int) {
 	buf.Write(tmp[4-size:])
 }
 
-// getCFFIndexCount 读取 CFF 索引的计数和大小
+// getCFFIndexCount 读取CFF索引的计数和大小
 // 入参: data CFF数据, offset 偏移量
 // 返回: int 数量, int 索引结构总大小
 func getCFFIndexCount(data []byte, offset int) (int, int) {
@@ -635,7 +635,7 @@ func getCFFIndexCount(data []byte, offset int) (int, int) {
 	return count, 3 + (count+1)*offSize + (dataEnd - 1)
 }
 
-// getCFFIndexData 读取 CFF 索引的数据块
+// getCFFIndexData 读取CFF索引的数据块
 // 入参: data CFF数据, offset 偏移量
 // 返回: []byte 索引数据(已去除offsets), int 索引结构总大小
 func getCFFIndexData(data []byte, offset int) ([]byte, int) {
@@ -665,7 +665,7 @@ func getCFFIndexData(data []byte, offset int) ([]byte, int) {
 	return data[start : start+length], size
 }
 
-// readCFFIndexItems 读取 CFF 索引中的所有数据项
+// readCFFIndexItems 读取CFF索引中的所有数据项
 // 入参: data CFF数据, offset 索引偏移
 // 返回: [][]byte 数据项列表
 func readCFFIndexItems(data []byte, offset int) [][]byte {
@@ -698,7 +698,7 @@ func readCFFIndexItems(data []byte, offset int) [][]byte {
 	return items
 }
 
-// parseCFFFDSelect 解析 CID CFF 的 FDSelect
+// parseCFFFDSelect 解析CID CFF的FDSelect
 // 入参: data CFF数据, offset FDSelect偏移, numGlyphs 字形数量
 // 返回: []int 字形对应的FD索引
 func parseCFFFDSelect(data []byte, offset int, numGlyphs int) []int {
@@ -754,7 +754,7 @@ func parseCFFFDSelect(data []byte, offset int, numGlyphs int) []int {
 	return result
 }
 
-// readCFFLocalSubrs 读取 CID CFF 的本地子程序
+// readCFFLocalSubrs 读取CID CFF的本地子程序
 // 入参: data CFF数据, fdArrOff FDArray偏移, fdCount FD数量
 // 返回: [][][]byte 本地子程序列表, []cffDict Private字典列表
 func readCFFLocalSubrs(data []byte, fdArrOff int, fdCount int) ([][][]byte, []cffDict) {
@@ -792,7 +792,7 @@ type type2Operand struct {
 	outStart int
 }
 
-// inlineType2CharString 内联 Type2 CharString 子程序调用
+// inlineType2CharString 内联Type2 CharString子程序调用
 // 入参: data CharString数据, localSubrs 本地子程序, globalSubrs 全局子程序, depth 递归深度
 // 返回: []byte 内联后的CharString数据
 func inlineType2CharString(data []byte, localSubrs, globalSubrs [][]byte, depth int) []byte {
@@ -881,7 +881,7 @@ func inlineType2CharString(data []byte, localSubrs, globalSubrs [][]byte, depth
 	return out
 }
 
-// removeType2Hints 移除 Type2 CharString 的 hint 指令
+// removeType2Hints 移除Type2 CharString的hint指令
 // 入参: data CharString数据
 // 返回: []byte 移除hint后的CharString数据
 func removeType2Hints(data []byte) []byte {
@@ -954,7 +954,7 @@ func removeType2Hints(data []byte) []byte {
 	return out
 }
 
-// cffSubrBias 获取 Type2 子程序偏移
+// cffSubrBias 获取Type2子程序偏移
 // 入参: count 子程序数量
 // 返回: int 偏移量
 func cffSubrBias(count int) int {
@@ -967,7 +967,7 @@ func cffSubrBias(count int) int {
 	return 32768
 }
 
-// parseCFFWidths 从 CFF 数据中解析 Glyph 宽度
+// parseCFFWidths 从CFF数据中解析Glyph宽度
 // 入参: data CFF数据, numGlyphs 字形数量
 // 返回: []uint16 宽度列表, error 错误信息
 func parseCFFWidths(data []byte, numGlyphs int) ([]uint16, error) {
@@ -1037,7 +1037,7 @@ func parseCFFWidths(data []byte, numGlyphs int) ([]uint16, error) {
 	return nil, fmt.Errorf("no charstrings")
 }
 
-// scanCharStringWidth 扫描 CharString 获取宽度
+// scanCharStringWidth 扫描CharString获取宽度
 // 入参: data CharString数据, nominal, def 默认宽度值
 // 返回: float64 宽度值
 func scanCharStringWidth(data []byte, nominal, def float64) float64 {
@@ -1099,7 +1099,7 @@ func parseShortInt(data []byte, idx int) float64 {
 	return float64(int16(binary.BigEndian.Uint16(data[idx+1:])))
 }
 
-// parseNumberType2 解析 Number (Type 2)
+// parseNumberType2 解析Number (Type 2)
 // 入参: data 数据, idx 索引
 // 返回: float64 浮点值
 func parseNumberType2(data []byte, idx int) float64 {
@@ -1135,7 +1135,7 @@ func readCFFOffset(data []byte, pos, size int) int {
 	return val
 }
 
-// getCFFCharsetInfo 读取 CFF 字符集和 ROS 信息
+// getCFFCharsetInfo 读取CFF字符集和ROS信息
 // 入参: data CFF数据, numGlyphs 字形数量
 // 返回: []int SID或CID列表, string Registry, string Ordering, int 字符串索引偏移, bool 是否成功
 func getCFFCharsetInfo(data []byte, numGlyphs int) ([]int, string, string, int, bool) {
@@ -1178,7 +1178,7 @@ func getCFFCharsetInfo(data []byte, numGlyphs int) ([]int, string, string, int,
 	return sids, registry, ordering, stringIndexOff, true
 }
 
-// getCmapFromCFF 从 CFF 数据中恢复 Unicode 映射
+// getCmapFromCFF 从CFF数据中恢复Unicode映射
 // 入参: data CFF数据, numGlyphs 字形数量
 // 返回: map[rune]uint16 恢复的映射表
 func getCmapFromCFF(data []byte, numGlyphs int) map[rune]uint16 {
@@ -1234,7 +1234,7 @@ func getCmapFromCFF(data []byte, numGlyphs int) map[rune]uint16 {
 	return mapping
 }
 
-// getCFFCIDRuneMap 获取 CID 到包装字体字符的映射
+// getCFFCIDRuneMap 获取CID到包装字体字符的映射
 // 入参: data CFF或OpenType字体数据
 // 返回: map[uint16]rune CID映射
 func getCFFCIDRuneMap(data []byte) map[uint16]rune {
@@ -1280,7 +1280,7 @@ func getCFFCIDRuneMap(data []byte) map[uint16]rune {
 	return result
 }
 
-// getCFFData 获取字体中的 CFF 数据
+// getCFFData 获取字体中的CFF数据
 // 入参: data 字体数据
 // 返回: []byte CFF数据
 func getCFFData(data []byte) []byte {
@@ -1314,7 +1314,7 @@ func getCFFData(data []byte) []byte {
 	return nil
 }
 
-// parseCFFCharset 解析 CFF 字符集并返回 SID 列表
+// parseCFFCharset 解析CFF字符集并返回SID列表
 // 入参: data CFF数据, offset 偏移量, numGlyphs 字形数量
 // 返回: []int SID列表
 func parseCFFCharset(data []byte, offset int, numGlyphs int) []int {
@@ -1357,7 +1357,7 @@ func parseCFFCharset(data []byte, offset int, numGlyphs int) []int {
 	return sids
 }
 
-// readStringIndexItem 读取 CFF 字符串索引项
+// readStringIndexItem 读取CFF字符串索引项
 // 入参: data CFF数据, offset 索引偏移, idx 索引号
 // 返回: string 读取的字符串
 func readStringIndexItem(data []byte, offset int, idx int) string {
@@ -1386,7 +1386,7 @@ func readStringIndexItem(data []byte, offset int, idx int) string {
 	return string(data[start : start+length])
 }
 
-// getCFFROS 读取 CID 字体 ROS 信息
+// getCFFROS 读取CID字体ROS信息
 // 入参: data CFF数据, stringIndexOff 字符串索引偏移, td 顶层字典
 // 返回: string Registry, string Ordering
 func getCFFROS(data []byte, stringIndexOff int, td cffDict) (string, string) {
@@ -1399,7 +1399,7 @@ func getCFFROS(data []byte, stringIndexOff int, td cffDict) (string, string) {
 	return registry, ordering
 }
 
-// getCFFSIDString 读取 CFF SID 字符串
+// getCFFSIDString 读取CFF SID字符串
 // 入参: data CFF数据, stringIndexOff 字符串索引偏移, sid 字符串ID
 // 返回: string 字符串内容
 func getCFFSIDString(data []byte, stringIndexOff int, sid int) string {
@@ -1412,7 +1412,7 @@ func getCFFSIDString(data []byte, stringIndexOff int, sid int) string {
 	return ""
 }
 
-// adobeGB1CIDToUnicode 将 Adobe-GB1 CID 转为 Unicode
+// adobeGB1CIDToUnicode 将Adobe-GB1 CID转为Unicode
 // 入参: cid 字符CID
 // 返回: rune Unicode字符, bool 是否成功
 func adobeGB1CIDToUnicode(cid int) (rune, bool) {
@@ -1541,7 +1541,7 @@ func getUnicodeFromName(name string) rune {
 	return 0
 }
 
-// cffStandardStrings CFF 标准字符串表
+// cffStandardStrings CFF标准字符串表
 var cffStandardStrings = []string{
 	".notdef", "space", "exclam", "quotedbl", "numbersign", "dollar", "percent", "ampersand", "quoteright", "parenleft", "parenright", "asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon", "less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum", "underscore", "quoteleft", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "braceleft", "bar", "braceright", "asciitilde", "exclamdown", "cent", "sterling", "fraction", "yen", "florin", "section", "currency", "quotesingle", "quotedblleft", "quotedblright", "guillemotleft", "guillemotright", "dagger", "daggerdbl", "fi", "fl", "endash", "emdash", "paragraph", "bullet", "quotesinglbase", "quotedblbase", "second", "circumflex", "breve", "dotaccent", "dieresis", "grave", "ring", "cedilla", "hungarumlaut", "ogonek", "caron", "emspace",
 	"AE", "ordfeminine", "Lslash", "Oslash", "OE", "ordmasculine", "ae", "dotlessi", "lslash", "oslash", "oe", "germandbls", "onesuperior", "logicalnot", "mu", "trademark", "Eth", "onehalf", "plusminus", "Thorn", "onequarter", "divide", "brokenbar", "degree", "thorn", "threequarters", "twosuperior", "registered", "minus", "eth", "multiply", "threesuperior", "copyright", "Aacute", "Acircumflex", "Adieresis", "Agrave", "Aring", "Atilde", "Ccedilla", "Eacute", "Ecircumflex", "Edieresis", "Egrave", "Iacute", "Icircumflex", "Idieresis", "Igrave", "Ntilde", "Oacute", "Ocircumflex", "Odieresis", "Ograve", "Otilde", "Scaron", "Uacute", "Ucircumflex", "Udieresis", "Ugrave", "Yacute", "Ydieresis", "Zcaron", "aacute", "acircumflex", "adieresis", "agrave", "aring", "atilde", "ccedilla", "eacute", "ecircumflex", "edieresis", "egrave", "iacute", "icircumflex", "idieresis", "igrave", "ntilde", "oacute", "ocircumflex", "odieresis", "ograve", "otilde", "scaron", "uacute", "ucircumflex", "udieresis", "ugrave", "yacute", "ydieresis", "zcaron", "exclamsmall", "Hungarumlautsmall", "dollaroldstyle", "dollarsuperior", "ampersandsmall", "Acutesmall", "parenleftsuperior", "parenrightsuperior", "2dotlead", "nbspace", "1dotlead", "zerooldstyle", "oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle", "sevenoldstyle", "eightoldstyle", "nineoldstyle", "commasuperior", "threequartersemdash", "periodsuperior", "questionsmall", "asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior", "lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior", "tsuperior", "ff", "ffi", "ffl", "parenleftinferior", "parenrightinferior", "Circumflexsmall", "hyphensuperior", "Gravesmall", "Asmall", "Bsmall", "Csmall", "Dsmall", "Esmall", "Fsmall", "Gsmall", "Hsmall", "Ismall", "Jsmall", "Ksmall", "Lsmall", "Msmall", "Nsmall", "Osmall", "Psmall", "Qsmall", "Rsmall", "Ssmall", "Tsmall", "Usmall", "Vsmall", "Wsmall", "Xsmall", "Ysmall", "Zsmall", "colonmonetary", "onefitted", "rupiah", "Tildesmall", "exclamdownsmall", "centoldstyle", "Lslashsmall", "Scaronsmall", "Zcaronsmall", "Dieresissmall", "Brevesmall", "Caronsmall", "Dotaccentsmall", "Macronsmall", "figuredash", "hypheninferior", "Ogoneksmall", "Ringsmall", "Cedillasmall", "questiondownsmall", "oneeighth", "threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds", "zerosuperior", "foursuperior", "fivesuperior", "sixsuperior", "sevensuperior", "eightsuperior", "ninesuperior", "zeroinferior", "oneinferior", "twoinferior", "threeinferior", "fourinferior", "fiveinferior", "sixinferior", "seveninferior", "eightinferior", "nineinferior", "centinferior", "dollarinferior", "periodinferior", "commainferior", "Agravesmall", "Aacutesmall", "Acircumflexsmall", "Atildesmall", "Adieresissmall", "Aringsmall", "AEsmall", "Ccedillasmall", "Egravesmall", "Eacutesmall", "Ecircumflexsmall", "Edieresissmall", "Igravesmall", "Iacutesmall", "Icircumflexsmall", "Idieresissmall", "Ethsmall", "Ntildesmall", "Ogravesmall", "Oacutesmall", "Ocircumflexsmall", "Otildesmall", "Odieresissmall", "OEsmall", "Oslashsmall", "Ugravesmall", "Uacutesmall", "Ucircumflexsmall", "Udieresissmall", "Yacutesmall", "Thornsmall", "Ydieresissmall", "001.000", "001.001", "001.002", "001.003", "Black", "Bold", "Book", "Light", "Medium", "Regular", "Roman", "Semibold",

ofdgo_font_ttf.go

@@ -18,7 +18,7 @@ import (
 	"encoding/binary"
 )
 
-// fixTrueType 尝试修复 TrueType/OpenType 字体数据
+// fixTrueType 尝试修复TrueType/OpenType字体数据
 // 入参: data 原始字体数据, fixCmap 是否修复cmap, fixName 是否修复name
 // 返回: bool 是否修复, []byte 修复后数据, map[rune]uint16 字符映射, bool 是否缺失cmap, error 错误信息
 func fixTrueType(data []byte, fixCmap, fixName bool) (bool, []byte, map[rune]uint16, bool, error) {
@@ -192,7 +192,7 @@ func fixTrueType(data []byte, fixCmap, fixName bool) (bool, []byte, map[rune]uin
 	return true, finalData, mapping, missingCmap, nil
 }
 
-// hasBadPostTable 检查 post 表是否会被 canvas/font 拒绝
+// hasBadPostTable 检查post表是否会被canvas/font拒绝
 func hasBadPostTable(data []byte, numGlyphs uint16, isTrueType bool) bool {
 	if len(data) < 32 {
 		return true
@@ -217,7 +217,7 @@ func hasBadPostTable(data []byte, numGlyphs uint16, isTrueType bool) bool {
 	}
 }
 
-// hasUsableCmap 检查是否存在可用的 cmap 子表
+// hasUsableCmap 检查是否存在可用的cmap子表
 // 入参: data cmap表数据
 // 返回: bool 是否可用
 func hasUsableCmap(data []byte) bool {
@@ -249,8 +249,8 @@ func hasUsableCmap(data []byte) bool {
 	return usable
 }
 
-// supportedCmapFormat 判断 cmap 子表格式是否可用
-// 入参: format cmap 子表格式, platformID 平台ID, encodingID 编码ID
+// supportedCmapFormat 判断cmap子表格式是否可用
+// 入参: format cmap子表格式, platformID 平台ID, encodingID 编码ID
 // 返回: bool 是否可用
 func supportedCmapFormat(format, platformID, encodingID uint16) bool {
 	switch format {

ofdgo_font_util.go

@@ -48,7 +48,7 @@ func calcTableChecksum(data []byte) uint32 {
 	return sum
 }
 
-// parseCmapMappings 解析 cmap 字符映射
+// parseCmapMappings 解析cmap字符映射
 // 入参: data cmap表数据
 // 返回: map[rune]uint16 字符到字形映射
 func parseCmapMappings(data []byte) map[rune]uint16 {
@@ -87,7 +87,7 @@ func parseCmapMappings(data []byte) map[rune]uint16 {
 	return result
 }
 
-// parseCmapFormat0 解析 cmap format 0
+// parseCmapFormat0 解析cmap format 0
 // 入参: data 子表数据, result 字符映射
 func parseCmapFormat0(data []byte, result map[rune]uint16) {
 	if len(data) < 262 {
@@ -101,7 +101,7 @@ func parseCmapFormat0(data []byte, result map[rune]uint16) {
 	}
 }
 
-// parseCmapFormat4 解析 cmap format 4
+// parseCmapFormat4 解析cmap format 4
 // 入参: data 子表数据, result 字符映射
 func parseCmapFormat4(data []byte, result map[rune]uint16) {
 	if len(data) < 16 {
@@ -152,7 +152,7 @@ func parseCmapFormat4(data []byte, result map[rune]uint16) {
 	}
 }
 
-// parseCmapFormat6 解析 cmap format 6
+// parseCmapFormat6 解析cmap format 6
 // 入参: data 子表数据, result 字符映射
 func parseCmapFormat6(data []byte, result map[rune]uint16) {
 	if len(data) < 10 {
@@ -168,7 +168,7 @@ func parseCmapFormat6(data []byte, result map[rune]uint16) {
 	}
 }
 
-// parseCmapFormat12 解析 cmap format 12
+// parseCmapFormat12 解析cmap format 12
 // 入参: data 子表数据, result 字符映射
 func parseCmapFormat12(data []byte, result map[rune]uint16) {
 	if len(data) < 16 {
@@ -207,7 +207,7 @@ func addPackedGlyphMapping(mapping map[rune]uint16, numGlyphs uint16) {
 	}
 }
 
-// buildHeadTable 构建 head 表
+// buildHeadTable 构建head表
 // 入参: unitsPerEm 每em单位数
 // 返回: []byte head表数据
 func buildHeadTable(unitsPerEm uint16) []byte {
@@ -233,7 +233,7 @@ func buildHeadTable(unitsPerEm uint16) []byte {
 	return buf.Bytes()
 }
 
-// buildHheaTable 构建 hhea 表
+// buildHheaTable 构建hhea表
 // 入参: numGlyphs 字形数量
 // 返回: []byte hhea表数据
 func buildHheaTable(numGlyphs uint16) []byte {
@@ -259,7 +259,7 @@ func buildHheaTable(numGlyphs uint16) []byte {
 	return buf.Bytes()
 }
 
-// buildCFFMaxpTable 构建 CFF 轮廓使用的 maxp 0.5 表
+// buildCFFMaxpTable 构建CFF轮廓使用的maxp 0.5表
 // 入参: numGlyphs 字形数量
 // 返回: []byte maxp表数据
 func buildCFFMaxpTable(numGlyphs uint16) []byte {
@@ -269,7 +269,7 @@ func buildCFFMaxpTable(numGlyphs uint16) []byte {
 	return buf.Bytes()
 }
 
-// buildTrueTypeMaxpTable 构建 TrueType 轮廓使用的 maxp 1.0 表
+// buildTrueTypeMaxpTable 构建TrueType轮廓使用的maxp 1.0表
 // 入参: numGlyphs 字形数量
 // 返回: []byte maxp表数据
 func buildTrueTypeMaxpTable(numGlyphs uint16) []byte {
@@ -282,13 +282,13 @@ func buildTrueTypeMaxpTable(numGlyphs uint16) []byte {
 	return buf.Bytes()
 }
 
-// buildOS2Table 构建 OS/2 表 (使用默认 Metrics)
+// buildOS2Table 构建OS/2表 (使用默认Metrics)
 // 返回: []byte OS/2表数据
 func buildOS2Table() []byte {
 	return buildOS2TableWithMetrics(800, -200)
 }
 
-// buildOS2TableWithMetrics 构建 OS/2 表
+// buildOS2TableWithMetrics 构建OS/2表
 // 入参: ascender 上升部, descender 下降部
 // 返回: []byte OS/2表数据
 func buildOS2TableWithMetrics(ascender, descender int16) []byte {
@@ -337,7 +337,7 @@ func buildOS2TableWithMetrics(ascender, descender int16) []byte {
 	return os2.Bytes()
 }
 
-// buildNameTable 构建 name 表 (最小化)
+// buildNameTable 构建name表 (最小化)
 // 返回: []byte name表数据
 func buildNameTable() []byte {
 	buf := new(bytes.Buffer)
@@ -347,7 +347,7 @@ func buildNameTable() []byte {
 	return buf.Bytes()
 }
 
-// buildPostTable 构建 post 表 (版本 3.0, 无字形名称)
+// buildPostTable 构建post表 (版本3.0, 无字形名称)
 // 返回: []byte post表数据
 func buildPostTable() []byte {
 	buf := new(bytes.Buffer)
@@ -363,7 +363,7 @@ func buildPostTable() []byte {
 	return buf.Bytes()
 }
 
-// buildHmtxTable 构建 hmtx 表
+// buildHmtxTable 构建hmtx表
 // 入参: widths 宽度列表
 // 返回: []byte hmtx表数据
 func buildHmtxTable(widths []uint16) []byte {
@@ -375,7 +375,7 @@ func buildHmtxTable(widths []uint16) []byte {
 	return buf.Bytes()
 }
 
-// cmapSegment cmap 表段结构
+// cmapSegment cmap表段结构
 // 字段: start 开始字符, end 结束字符, delta 增量, offset 偏移
 type cmapSegment struct {
 	start, end uint16
@@ -383,7 +383,7 @@ type cmapSegment struct {
 	offset     uint16
 }
 
-// buildCmapTable 构建 cmap 表 (Format 4)
+// buildCmapTable 构建cmap表 (Format 4)
 // 入参: numGlyphs 字形数量, mapping 字符映射
 // 返回: []byte cmap表数据
 func buildCmapTable(numGlyphs uint16, mapping map[rune]uint16) []byte {
@@ -489,7 +489,7 @@ func buildCmapTable(numGlyphs uint16, mapping map[rune]uint16) []byte {
 	return mainBuf.Bytes()
 }
 
-// shouldBuildCmapFormat12 判断 format 4 是否会溢出 16 位 length
+// shouldBuildCmapFormat12 判断format 4是否会溢出16位length
 func shouldBuildCmapFormat12(mapping map[rune]uint16) bool {
 	if mapping == nil {
 		return false
@@ -526,7 +526,7 @@ func shouldBuildCmapFormat12(mapping map[rune]uint16) bool {
 	return length > 0xFFFF
 }
 
-// buildCmapTableFormat12 构建 cmap 表 (Format 12)
+// buildCmapTableFormat12 构建cmap表 (Format 12)
 // 入参: numGlyphs 字形数量, mapping 字符映射
 // 返回: []byte cmap表数据
 func buildCmapTableFormat12(numGlyphs uint16, mapping map[rune]uint16) []byte {
@@ -599,7 +599,7 @@ func buildCmapTableFormat12(numGlyphs uint16, mapping map[rune]uint16) []byte {
 	return mainBuf.Bytes()
 }
 
-// otfTableRecord OTF 表记录结构
+// otfTableRecord OTF表记录结构
 // 字段: tag 标签, checksum 校验和, offset 偏移, length 长度, data 数据
 type otfTableRecord struct {
 	tag      string
@@ -609,7 +609,7 @@ type otfTableRecord struct {
 	data     []byte
 }
 
-// serializeOTF 序列化 OpenType 字体结构
+// serializeOTF 序列化OpenType字体结构
 // 入参: tables 表数据映射
 // 返回: []byte 完整字体数据, error 错误信息
 func serializeOTF(tables map[string][]byte) ([]byte, error) {

ofdgo_image.go

@@ -80,7 +80,7 @@ func decodeImageConfigData(data []byte) (image.Config, string, error) {
 	return image.Config{}, "", err
 }
 
-// decodeBMPConfig 解码 BMP 尺寸
+// decodeBMPConfig 解码BMP尺寸
 // 入参: data 图片数据
 // 返回: image.Config 图片尺寸, error 错误信息
 func decodeBMPConfig(data []byte) (image.Config, error) {
@@ -100,7 +100,7 @@ func decodeBMPConfig(data []byte) (image.Config, error) {
 	return image.Config{ColorModel: color.NRGBAModel, Width: width, Height: height}, nil
 }
 
-// decodeBMPImage 解码 BMP 图片
+// decodeBMPImage 解码BMP图片
 // 入参: data 图片数据
 // 返回: image.Image 图片对象, error 错误信息
 func decodeBMPImage(data []byte) (image.Image, error) {
@@ -153,7 +153,7 @@ func decodeBMPImage(data []byte) (image.Image, error) {
 	return img, nil
 }
 
-// parseBMPHeader 解析 BMP 文件头
+// parseBMPHeader 解析BMP文件头
 // 入参: data 图片数据
 // 返回: int 像素偏移, int 宽度, int 高度, uint16 位数, uint32 压缩方式, error 错误信息
 func parseBMPHeader(data []byte) (int, int, int, uint16, uint32, error) {

ofdgo_page.go

@@ -194,14 +194,16 @@ type AxialShd struct {
 
 // RadialShd 径向渐变
 type RadialShd struct {
-	MapType     string       `xml:"MapType,attr"`
-	MapUnit     float64      `xml:"MapUnit,attr"`
-	Extend      string       `xml:"Extend,attr"`
-	StartPoint  string       `xml:"StartPoint,attr"`
-	StartRadius float64      `xml:"StartRadius,attr"`
-	EndPoint    string       `xml:"EndPoint,attr"`
-	EndRadius   float64      `xml:"EndRadius,attr"`
-	Segment     []ShdSegment `xml:"Segment"`
+	MapType      string       `xml:"MapType,attr"`
+	MapUnit      float64      `xml:"MapUnit,attr"`
+	Eccentricity float64      `xml:"Eccentricity,attr"`
+	Angle        float64      `xml:"Angle,attr"`
+	Extend       string       `xml:"Extend,attr"`
+	StartPoint   string       `xml:"StartPoint,attr"`
+	StartRadius  float64      `xml:"StartRadius,attr"`
+	EndPoint     string       `xml:"EndPoint,attr"`
+	EndRadius    float64      `xml:"EndRadius,attr"`
+	Segment      []ShdSegment `xml:"Segment"`
 }
 
 // ShdSegment 渐变分段

ofdgo_paint.go

@@ -167,8 +167,8 @@ func parseFillPaint(fillColor *FillColor, x, y, pageH float64) any {
 	if gradient := parseAxialShdGradient(fillColor.AxialShd, fillColor.Alpha, x, y, pageH); gradient != nil {
 		return newShdPaint(gradient, fillColor.AxialShd.Extend, fillColor.AxialShd.MapType, fillColor.AxialShd.MapUnit)
 	}
-	if gradient := parseRadialShdGradient(fillColor.RadialShd, fillColor.Alpha, x, y, pageH); gradient != nil {
-		return newShdPaint(gradient, fillColor.RadialShd.Extend, fillColor.RadialShd.MapType, fillColor.RadialShd.MapUnit)
+	if paint := parseRadialShdPaint(fillColor.RadialShd, fillColor.Alpha, x, y, pageH); paint != nil {
+		return paint
 	}
 	if fillColor.AxialShd != nil {
 		return parseShdColor(fillColor.AxialShd.Segment, fillColor.Alpha)
@@ -211,8 +211,8 @@ func parseStrokePaint(strokeColor *StrokeColor, x, y, pageH float64) any {
 	if gradient := parseAxialShdGradient(strokeColor.AxialShd, strokeColor.Alpha, x, y, pageH); gradient != nil {
 		return newShdPaint(gradient, strokeColor.AxialShd.Extend, strokeColor.AxialShd.MapType, strokeColor.AxialShd.MapUnit)
 	}
-	if gradient := parseRadialShdGradient(strokeColor.RadialShd, strokeColor.Alpha, x, y, pageH); gradient != nil {
-		return newShdPaint(gradient, strokeColor.RadialShd.Extend, strokeColor.RadialShd.MapType, strokeColor.RadialShd.MapUnit)
+	if paint := parseRadialShdPaint(strokeColor.RadialShd, strokeColor.Alpha, x, y, pageH); paint != nil {
+		return paint
 	}
 	if strokeColor.AxialShd != nil {
 		return parseShdColor(strokeColor.AxialShd.Segment, strokeColor.Alpha)
@@ -339,10 +339,10 @@ func axialShdClip(ctx *canvas.Context, gradient *canvas.LinearGradient, extend i
 	return area.ToPath().Transform(axis)
 }
 
-// parseRadialShdGradient 解析径向渐变
+// parseRadialShdPaint 解析径向渐变画刷
 // 入参: radialShd 径向渐变节点, alpha 透明度, x X坐标, y Y坐标, pageH 页面高度
-// 返回: canvas.Gradient 渐变对象
-func parseRadialShdGradient(radialShd *RadialShd, alpha *int, x, y, pageH float64) canvas.Gradient {
+// 返回: *shdPaint 渐变画刷
+func parseRadialShdPaint(radialShd *RadialShd, alpha *int, x, y, pageH float64) *shdPaint {
 	if radialShd == nil || radialShd.EndRadius <= 0 {
 		return nil
 	}
@@ -357,7 +357,12 @@ func parseRadialShdGradient(radialShd *RadialShd, alpha *int, x, y, pageH float6
 	}
 	startPoint := canvas.Point{X: x + start[0], Y: pageH - (y + start[1])}
 	endPoint := canvas.Point{X: x + end[0], Y: pageH - (y + end[1])}
-	return gradient.ToRadial(startPoint, radialShd.StartRadius, endPoint, radialShd.EndRadius)
+	paint := newShdPaint(gradient.ToRadial(startPoint, radialShd.StartRadius, endPoint, radialShd.EndRadius), radialShd.Extend, radialShd.MapType, radialShd.MapUnit)
+	if e := radialShd.Eccentricity; 0 < e && e < 1 {
+		paint.view = canvas.Identity.Translate(startPoint.X, startPoint.Y).Rotate(-radialShd.Angle).Scale(1, math.Sqrt(1-e*e)).Translate(-startPoint.X, -startPoint.Y)
+		paint.gradient = gradient.ToRadial(startPoint, radialShd.StartRadius, paint.view.Inv().Dot(endPoint), radialShd.EndRadius)
+	}
+	return paint
 }
 
 // colorToRGBA 转换颜色对象

ofdgo_renderer_path.go

@@ -211,7 +211,7 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
 		style.fillPaint = style.fillColor
 	}
 	if shouldFill {
-		fillPaint, shadingClip := resolveShdPaint(ctx, style.fillPaint)
+		fillPaint, shadingClip, fillView := resolveShdPaint(ctx, style.fillPaint)
 		fillClip := intersectClipPath(clipPath, shadingClip)
 		fp := p
 		fillRule := canvas.NonZero
@@ -232,7 +232,7 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
 			ctx.SetFillRule(fillRule)
 			ctx.SetFill(fillPaint)
 			ctx.SetStrokeColor(canvas.Transparent)
-			ctx.DrawPath(0, 0, fp)
+			drawShdPath(ctx, fp, fillView)
 		}
 	}
 	shouldStroke := true
@@ -247,28 +247,27 @@ func (r *Renderer) renderPath(ctx *canvas.Context, obj PathObject, pageH float64
 		if style.strokePaint == nil {
 			style.strokePaint = colorWithAlpha(canvas.Black, obj.Alpha)
 		}
-		strokePaint, shadingClip := resolveShdPaint(ctx, style.strokePaint)
+		strokePaint, shadingClip, strokeView := resolveShdPaint(ctx, style.strokePaint)
 		ctx.SetFillColor(canvas.Transparent)
 		ctx.SetStroke(strokePaint)
 		ctx.SetStrokeWidth(style.lineWidth)
 		ctx.SetStrokeCapper(style.lineCap)
 		ctx.SetStrokeJoiner(style.lineJoin)
+		sp := p
 		if len(style.dashPattern) > 0 {
-			ctx.SetDashes(style.dashOffset, style.dashPattern...)
+			sp = sp.Dash(style.dashOffset, style.dashPattern...)
+			ctx.SetDashes(0)
 		}
 		strokeClip := intersectClipPath(clipPath, shadingClip)
-		if strokeClip != nil {
-			sp := p.Copy()
-			if len(style.dashPattern) > 0 {
-				sp = sp.Dash(style.dashOffset, style.dashPattern...)
-			}
+		if strokeClip != nil || strokeView != canvas.Identity {
+			sp = sp.Copy()
 			sp = sp.Stroke(style.lineWidth, style.lineCap, style.lineJoin, canvas.Tolerance)
 			sp = applyClipPath(sp, strokeClip)
 			ctx.SetFill(strokePaint)
 			ctx.SetStrokeColor(canvas.Transparent)
-			ctx.DrawPath(0, 0, sp)
+			drawShdPath(ctx, sp, strokeView)
 		} else {
-			ctx.DrawPath(0, 0, p)
+			ctx.DrawPath(0, 0, sp)
 		}
 	}
 	ctx.Pop()

ofdgo_renderer_text.go

@@ -89,10 +89,11 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 	if fillPaint == nil {
 		fillPaint = fillColor
 	}
-	fillPaint, shadingClip := resolveShdPaint(ctx, fillPaint)
+	fillPaint, shadingClip, fillView := resolveShdPaint(ctx, fillPaint)
 	fillClip := intersectClipPath(clipPath, shadingClip)
 	strokeStyle := newPathStyle(nil, defaultStroke, 0, obj.Alpha)
 	strokeClip := clipPath
+	strokeView := canvas.Identity
 	if shouldStroke {
 		if dp != nil {
 			strokeStyle.applyDrawParam(dp, bx, by, pageH, obj.Alpha)
@@ -107,7 +108,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 			strokeStyle.strokePaint = colorWithAlpha(canvas.Black, obj.Alpha)
 		}
 		strokeStyle.scale(ctm)
-		strokeStyle.strokePaint, shadingClip = resolveShdPaint(ctx, strokeStyle.strokePaint)
+		strokeStyle.strokePaint, shadingClip, strokeView = resolveShdPaint(ctx, strokeStyle.strokePaint)
 		strokeClip = intersectClipPath(strokeClip, shadingClip)
 	}
 	fontStyle := canvas.FontRegular
@@ -240,7 +241,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 				if shouldFill && fillPaint != nil {
 					ctx.SetFill(fillPaint)
 					ctx.SetStrokeColor(canvas.Transparent)
-					ctx.DrawPath(0, 0, applyClipPath(path.Copy(), fillClip))
+					drawShdPath(ctx, applyClipPath(path.Copy(), fillClip), fillView)
 				}
 				if len(strokeStyle.dashPattern) > 0 {
 					path = path.Dash(strokeStyle.dashOffset, strokeStyle.dashPattern...)
@@ -248,7 +249,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 				path = path.Stroke(strokeStyle.lineWidth, strokeStyle.lineCap, strokeStyle.lineJoin, canvas.Tolerance)
 				ctx.SetFill(strokeStyle.strokePaint)
 				ctx.SetStrokeColor(canvas.Transparent)
-				ctx.DrawPath(0, 0, applyClipPath(path, strokeClip))
+				drawShdPath(ctx, applyClipPath(path, strokeClip), strokeView)
 				if hasUnderline {
 					underline := &canvas.Path{}
 					underline.MoveTo(0, -sizeMM*0.1)
@@ -256,8 +257,10 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 					underline = underline.Stroke(sizeMM*0.05, canvas.ButtCap, canvas.MiterJoin, canvas.Tolerance)
 					if shouldFill {
 						ctx.SetFillColor(fillColor)
+						ctx.DrawPath(0, 0, applyClipPath(underline.Transform(transform), clipPath))
+					} else {
+						drawShdPath(ctx, applyClipPath(underline.Transform(transform), strokeClip), strokeView)
 					}
-					ctx.DrawPath(0, 0, applyClipPath(underline.Transform(transform), clipPath))
 				}
 				continue
 			}
@@ -274,7 +277,7 @@ func (r *Renderer) renderText(ctx *canvas.Context, obj TextObject, pageH float64
 						textTransform = textTransform.Mul(glyphMatrix)
 					}
 					glyphPath = applyClipPath(glyphPath.Copy().Transform(textTransform.Scale(scaleX, 1)), fillClip)
-					ctx.DrawPath(0, 0, glyphPath)
+					drawShdPath(ctx, glyphPath, fillView)
 					if hasUnderline {
 						uw := sizeMM * 0.05
 						off := sizeMM * 0.1

ofdgo_shading.go

@@ -23,6 +23,7 @@ import (
 
 type shdPaint struct {
 	gradient canvas.Gradient
+	view     canvas.Matrix
 	extend   int
 	mapType  string
 	period   float64
@@ -44,46 +45,49 @@ func newShdPaint(gradient canvas.Gradient, extend, mapType string, mapUnit float
 	if mapUnit > 0 && length > 0 {
 		period = mapUnit / length
 	}
-	return &shdPaint{gradient: gradient, extend: flags, mapType: mapType, period: period}
+	return &shdPaint{gradient: gradient, view: canvas.Identity, extend: flags, mapType: mapType, period: period}
 }
 
 // resolveShdPaint 解析渐变画刷和裁剪区域
 // 入参: ctx 画布上下文, paint 画刷
-// 返回: any 画刷, *canvas.Path 裁剪区域
-func resolveShdPaint(ctx *canvas.Context, paint any) (any, *canvas.Path) {
+// 返回: any 画刷, *canvas.Path 裁剪区域, canvas.Matrix 渐变变换
+func resolveShdPaint(ctx *canvas.Context, paint any) (any, *canvas.Path, canvas.Matrix) {
 	s, ok := paint.(*shdPaint)
 	if !ok {
-		return paint, nil
+		return paint, nil, canvas.Identity
 	}
 	switch g := s.gradient.(type) {
 	case *canvas.LinearGradient:
 		clip := axialShdClip(ctx, g, s.extend)
 		if s.mapType != "Reflect" {
-			return g, clip
+			return g, clip, s.view
 		}
 		d := g.End.Sub(g.Start)
 		axis := canvas.Matrix{{d.X, -d.Y, g.Start.X}, {d.Y, d.X, g.Start.Y}}
 		area := shdCanvasBounds(ctx).Transform(axis.Inv())
 		lo, hi := s.rangeLimits(area.X0, area.X1)
 		if hi <= lo {
-			return g, &canvas.Path{}
+			return g, &canvas.Path{}, s.view
 		}
 		gradient := reflectShdGrad(g.Grad, s.period, lo, hi)
-		return gradient.ToLinear(g.Start.Add(d.Mul(lo)), g.Start.Add(d.Mul(hi))), clip
+		return gradient.ToLinear(g.Start.Add(d.Mul(lo)), g.Start.Add(d.Mul(hi))), clip, s.view
 	case *canvas.RadialGradient:
 		d, dr := g.C1.Sub(g.C0), g.R1-g.R0
 		length := d.Length()
 		if length >= math.Abs(dr) {
-			return g, nil
+			return g, nil, s.view
+		}
+		bounds := shdCanvasBounds(ctx).Transform(s.view.Inv())
+		clip := radialShdClip(g, s.extend, bounds)
+		if clip != nil && s.view != canvas.Identity {
+			clip = clip.Transform(s.view)
 		}
-		clip := radialShdClip(ctx, g, s.extend)
 		if s.mapType != "Reflect" {
-			return g, clip
+			return g, clip, s.view
 		}
 		lo, hi := 0.0, 1.0
 		if s.extend != 0 {
 			distance := 0.0
-			bounds := shdCanvasBounds(ctx)
 			for _, point := range []canvas.Point{{X: bounds.X0, Y: bounds.Y0}, {X: bounds.X1, Y: bounds.Y0}, {X: bounds.X1, Y: bounds.Y1}, {X: bounds.X0, Y: bounds.Y1}} {
 				distance = math.Max(distance, point.Sub(g.C0).Length())
 			}
@@ -96,12 +100,24 @@ func resolveShdPaint(ctx *canvas.Context, paint any) (any, *canvas.Path) {
 			hi = math.Min(hi, -g.R0/dr)
 		}
 		if hi <= lo {
-			return g, &canvas.Path{}
+			return g, &canvas.Path{}, s.view
 		}
 		gradient := reflectShdGrad(g.Grad, s.period, lo, hi)
-		return gradient.ToRadial(g.C0.Add(d.Mul(lo)), math.Max(0, g.R0+dr*lo), g.C0.Add(d.Mul(hi)), math.Max(0, g.R0+dr*hi)), clip
+		return gradient.ToRadial(g.C0.Add(d.Mul(lo)), math.Max(0, g.R0+dr*lo), g.C0.Add(d.Mul(hi)), math.Max(0, g.R0+dr*hi)), clip, s.view
 	}
-	return s.gradient, nil
+	return s.gradient, nil, s.view
+}
+
+// drawShdPath 绘制渐变路径并保持图形轮廓不变
+// 入参: ctx 画布上下文, path 填充路径, view 渐变变换
+func drawShdPath(ctx *canvas.Context, path *canvas.Path, view canvas.Matrix) {
+	if view == canvas.Identity {
+		ctx.DrawPath(0, 0, path)
+		return
+	}
+	origin := ctx.CoordView().Dot(canvas.Point{})
+	m := ctx.CoordSystemView().Mul(ctx.View()).Translate(origin.X, origin.Y).Mul(view)
+	ctx.RenderPath(path.Copy().Transform(view.Inv()), ctx.Style, m)
 }
 
 // rangeLimits 限制渐变延伸区间
@@ -131,9 +147,9 @@ func shdCanvasBounds(ctx *canvas.Context) canvas.Rect {
 }
 
 // radialShdClip 获取包含双圆的径向渐变裁剪区域
-// 入参: ctx 画布上下文, g 径向渐变, extend 延伸方向
+// 入参: g 径向渐变, extend 延伸方向, bounds 渐变坐标系下的画布边界
 // 返回: *canvas.Path 裁剪区域
-func radialShdClip(ctx *canvas.Context, g *canvas.RadialGradient, extend int) *canvas.Path {
+func radialShdClip(g *canvas.RadialGradient, extend int, bounds canvas.Rect) *canvas.Path {
 	inner, outer := g.C0, g.C1
 	r0, r1 := g.R0, g.R1
 	if r1 < r0 {
@@ -147,7 +163,7 @@ func radialShdClip(ctx *canvas.Context, g *canvas.RadialGradient, extend int) *c
 	if extend&2 == 0 {
 		clip = canvas.Circle(r1).Translate(outer.X, outer.Y)
 	} else {
-		clip = shdCanvasBounds(ctx).ToPath()
+		clip = bounds.ToPath()
 	}
 	if extend&1 == 0 && r0 > 0 {
 		clip = clip.Not(canvas.Circle(r0).Translate(inner.X, inner.Y))