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https://github.com/xiaoqidun/ofdgo.git
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feat(归并文件): 归并根包文件
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xiaoqidun committed
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commit
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-817
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@@ -15,10 +15,17 @@
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package ofdgo
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import (
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"bytes"
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"context"
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"encoding/binary"
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"errors"
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"fmt"
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"image"
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"io"
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"math"
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baseimage "github.com/xiaoqidun/ofdgo/internal/base/image"
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"github.com/xiaoqidun/pdfgo"
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)
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// compressionPatternImageLimit 限制底纹尺寸分析的变换组合数，超限时保留原图尺寸
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@@ -397,3 +404,173 @@ func (v *compressionImages) patternImages(color *FillColor, object Matrix) error
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}
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return nil
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}
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// outputImageFormat 识别可由资源压缩生成的图片格式
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// 入参: data 图片编码
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// 返回: string 标准资源格式，未识别时为空
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func outputImageFormat(data []byte) string {
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if baseimage.IsJPEG(data) {
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return "JPEG"
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}
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if baseimage.IsPNG(data) {
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return "PNG"
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}
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return ""
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}
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// optimizeImageResource 优化可完整保留的BMP及TIFF，复用图像压缩和降采样策略
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// 原始模式及无法保留的色彩配置不转换，仅采用小于原始编码的结果
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// 入参: ctx 取消上下文, data 图片编码, options 压缩选项, size 像素需求
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// 返回: []byte 图片编码，可能引用输入, error 解码、编码或取消错误
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func optimizeImageResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
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if err := options.Validate(); err != nil {
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return nil, err
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}
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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if options.Mode != CompressionUnchanged && baseimage.IsTIFF(data) {
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return optimizeTIFFResource(ctx, data, options, size)
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}
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if options.Mode == CompressionUnchanged || !bytes.HasPrefix(data, []byte("BM")) {
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return pdfgo.OptimizeImageResource(ctx, data, options, size)
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}
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return optimizeBMPResource(ctx, data, options, size)
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}
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// optimizeBMPResource 压缩可保留色彩与密度的位图，未知元数据及高精度位域保持原样
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// 入参: ctx 取消上下文, data BMP编码, options 压缩选项, size 像素需求
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// 返回: []byte 图片编码, error 解码、编码或取消错误
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func optimizeBMPResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
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offset, width, height, depth, compression, err := baseimage.ParseBMPHeader(data)
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if err != nil {
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return data, nil
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}
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if height < 0 {
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height = -height
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}
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if int64(width)*int64(height) > outputOptimizationBufferLimit/4 || compression != 0 && compression != 3 {
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return data, nil
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}
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header := binary.LittleEndian.Uint32(data[14:18])
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if header != 40 && header != 108 && header != 124 {
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return data, nil
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}
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if header >= 108 && binary.LittleEndian.Uint32(data[70:74]) != 0x73524742 {
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return data, nil
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}
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if header == 124 && (binary.LittleEndian.Uint32(data[122:126]) != 0 || binary.LittleEndian.Uint32(data[126:130]) != 0 || binary.LittleEndian.Uint32(data[130:134]) != 0) {
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return data, nil
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}
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stride := (int64(width)*int64(depth) + 31) / 32 * 4
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if int64(offset)+stride*int64(height) != int64(len(data)) {
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return data, nil
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}
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density, ok := baseimage.BMPDensity(data)
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if !ok {
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return data, nil
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}
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if depth == 16 || depth == 32 {
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masks, err := baseimage.BMPColorMasks(data, offset, depth, compression)
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if err != nil {
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return data, nil
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}
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if options.Mode == CompressionLossless {
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for _, mask := range masks {
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if mask.Max > 255 {
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return data, nil
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}
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}
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}
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}
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var pixels image.Image
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if depth == 16 || compression == 3 {
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pixels, err = baseimage.DecodeBMPContext(ctx, data)
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} else {
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pixels, _, err = image.Decode(imageInput{ReadCloser: io.NopCloser(bytes.NewReader(data)), ctx: ctx})
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}
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if err != nil {
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return nil, err
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}
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return optimizeRasterResource(ctx, data, pixels, options, size, density)
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}
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// optimizeRasterResource 编码已解码的资源图片，同步降采样后的像素密度，仅采用更小结果
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// 先降采样再编码，绝对密度按最终尺寸量化，相对密度保留精确比例
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// 有密度时保留PNG，未知密度按最终像素选择编码格式
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// 入参: ctx 取消上下文, data 原编码, pixels 像素, options 压缩选项, size 像素需求, density 像素密度
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// 返回: []byte 图片编码, error 编码或取消错误
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func optimizeRasterResource(ctx context.Context, data []byte, pixels image.Image, options CompressionOptions, size image.Point, density baseimage.Density) ([]byte, error) {
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hasDensity := density.X != 0 || density.Y != 0
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before := pixels.Bounds().Size()
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if options.Mode == CompressionLossy {
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var err error
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pixels, err = pdfgo.ResizeImage(ctx, pixels, size)
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if err != nil {
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return nil, err
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}
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}
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var ok bool
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density, ok = density.Scale(before, pixels.Bounds().Size())
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if !ok {
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return data, ctx.Err()
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}
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var candidate []byte
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var err error
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if hasDensity {
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var encoded bytes.Buffer
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err = pdfgo.EncodePNGWithOptions(ctx, &encoded, pixels, options)
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candidate = encoded.Bytes()
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} else {
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candidate, err = pdfgo.EncodeImageResource(ctx, pixels, options)
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}
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if err != nil {
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if errors.Is(err, io.ErrShortBuffer) {
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return data, ctx.Err()
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}
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return nil, err
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}
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if hasDensity {
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if len(candidate) > outputOptimizationBufferLimit-baseimage.PNGDensityChunkSize {
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return data, ctx.Err()
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}
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candidate, ok = baseimage.WithPNGDensity(candidate, density)
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if !ok {
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return data, ctx.Err()
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}
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}
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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if len(candidate) < len(data) {
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return candidate, nil
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}
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return data, nil
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}
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// optimizeTIFFResource 压缩单目录TIFF，保留方向、透明度、采样精度及像素密度
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// 主图或单个瓦片的预计缓冲超限时保留原编码
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// 入参: ctx 取消上下文, data TIFF编码, options 压缩选项, size 显示像素需求
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// 返回: []byte 图片编码，不可完整转换时保留原文, error 编码或取消错误
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func optimizeTIFFResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
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layout, err := baseimage.ReadTIFFLayoutContext(ctx, bytes.NewReader(data))
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if err != nil {
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return data, ctx.Err()
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}
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pixelSize := int64(layout.DecodedPixelBytes())
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if int64(layout.Width) > outputOptimizationBufferLimit/pixelSize/int64(layout.Height) {
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return data, ctx.Err()
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}
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if layout.TileWidth != 0 && int64(layout.TileWidth) > outputOptimizationBufferLimit/pixelSize/int64(layout.TileHeight) {
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return data, ctx.Err()
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}
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density, ok := baseimage.TIFFConversionDensity(data, layout)
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if !ok {
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return data, ctx.Err()
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}
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pixels, err := baseimage.DecodeTIFF(ctx, data, layout)
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if err != nil {
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return data, ctx.Err()
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}
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return optimizeRasterResource(ctx, data, pixels, options, size, density)
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}
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@@ -1,197 +0,0 @@
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// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ofdgo
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import (
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"bytes"
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"context"
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"encoding/binary"
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"errors"
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"image"
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"io"
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baseimage "github.com/xiaoqidun/ofdgo/internal/base/image"
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"github.com/xiaoqidun/pdfgo"
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)
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// outputImageFormat 识别可由资源压缩生成的图片格式
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// 入参: data 图片编码
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// 返回: string 标准资源格式，未识别时为空
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func outputImageFormat(data []byte) string {
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if baseimage.IsJPEG(data) {
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return "JPEG"
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}
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if baseimage.IsPNG(data) {
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return "PNG"
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}
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return ""
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}
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// optimizeImageResource 优化可完整保留的BMP及TIFF，复用图像压缩和降采样策略
|
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// 原始模式及无法保留的色彩配置不转换，仅采用小于原始编码的结果
|
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// 入参: ctx 取消上下文, data 图片编码, options 压缩选项, size 像素需求
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// 返回: []byte 图片编码，可能引用输入, error 解码、编码或取消错误
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func optimizeImageResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
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if err := options.Validate(); err != nil {
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return nil, err
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}
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if err := ctx.Err(); err != nil {
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return nil, err
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}
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if options.Mode != CompressionUnchanged && baseimage.IsTIFF(data) {
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return optimizeTIFFResource(ctx, data, options, size)
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}
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if options.Mode == CompressionUnchanged || !bytes.HasPrefix(data, []byte("BM")) {
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return pdfgo.OptimizeImageResource(ctx, data, options, size)
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}
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return optimizeBMPResource(ctx, data, options, size)
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}
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// optimizeBMPResource 压缩可保留色彩与密度的位图，未知元数据及高精度位域保持原样
|
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// 入参: ctx 取消上下文, data BMP编码, options 压缩选项, size 像素需求
|
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// 返回: []byte 图片编码, error 解码、编码或取消错误
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func optimizeBMPResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
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offset, width, height, depth, compression, err := baseimage.ParseBMPHeader(data)
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if err != nil {
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return data, nil
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}
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if height < 0 {
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height = -height
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}
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if int64(width)*int64(height) > outputOptimizationBufferLimit/4 || compression != 0 && compression != 3 {
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return data, nil
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}
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header := binary.LittleEndian.Uint32(data[14:18])
|
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if header != 40 && header != 108 && header != 124 {
|
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return data, nil
|
||||
}
|
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if header >= 108 && binary.LittleEndian.Uint32(data[70:74]) != 0x73524742 {
|
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return data, nil
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}
|
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if header == 124 && (binary.LittleEndian.Uint32(data[122:126]) != 0 || binary.LittleEndian.Uint32(data[126:130]) != 0 || binary.LittleEndian.Uint32(data[130:134]) != 0) {
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return data, nil
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}
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stride := (int64(width)*int64(depth) + 31) / 32 * 4
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if int64(offset)+stride*int64(height) != int64(len(data)) {
|
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return data, nil
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}
|
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density, ok := baseimage.BMPDensity(data)
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if !ok {
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return data, nil
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}
|
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if depth == 16 || depth == 32 {
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masks, err := baseimage.BMPColorMasks(data, offset, depth, compression)
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if err != nil {
|
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return data, nil
|
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}
|
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if options.Mode == CompressionLossless {
|
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for _, mask := range masks {
|
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if mask.Max > 255 {
|
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return data, nil
|
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}
|
||||
}
|
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}
|
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}
|
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var pixels image.Image
|
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if depth == 16 || compression == 3 {
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pixels, err = baseimage.DecodeBMPContext(ctx, data)
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} else {
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pixels, _, err = image.Decode(imageInput{ReadCloser: io.NopCloser(bytes.NewReader(data)), ctx: ctx})
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}
|
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if err != nil {
|
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return nil, err
|
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}
|
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return optimizeRasterResource(ctx, data, pixels, options, size, density)
|
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}
|
||||
|
||||
// optimizeRasterResource 编码已解码的资源图片，同步降采样后的像素密度，仅采用更小结果
|
||||
// 先降采样再编码，绝对密度按最终尺寸量化，相对密度保留精确比例
|
||||
// 有密度时保留PNG，未知密度按最终像素选择编码格式
|
||||
// 入参: ctx 取消上下文, data 原编码, pixels 像素, options 压缩选项, size 像素需求, density 像素密度
|
||||
// 返回: []byte 图片编码, error 编码或取消错误
|
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func optimizeRasterResource(ctx context.Context, data []byte, pixels image.Image, options CompressionOptions, size image.Point, density baseimage.Density) ([]byte, error) {
|
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hasDensity := density.X != 0 || density.Y != 0
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before := pixels.Bounds().Size()
|
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if options.Mode == CompressionLossy {
|
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var err error
|
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pixels, err = pdfgo.ResizeImage(ctx, pixels, size)
|
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if err != nil {
|
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return nil, err
|
||||
}
|
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}
|
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var ok bool
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density, ok = density.Scale(before, pixels.Bounds().Size())
|
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if !ok {
|
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return data, ctx.Err()
|
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}
|
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var candidate []byte
|
||||
var err error
|
||||
if hasDensity {
|
||||
var encoded bytes.Buffer
|
||||
err = pdfgo.EncodePNGWithOptions(ctx, &encoded, pixels, options)
|
||||
candidate = encoded.Bytes()
|
||||
} else {
|
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candidate, err = pdfgo.EncodeImageResource(ctx, pixels, options)
|
||||
}
|
||||
if err != nil {
|
||||
if errors.Is(err, io.ErrShortBuffer) {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
if hasDensity {
|
||||
if len(candidate) > outputOptimizationBufferLimit-baseimage.PNGDensityChunkSize {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
candidate, ok = baseimage.WithPNGDensity(candidate, density)
|
||||
if !ok {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
}
|
||||
if err := ctx.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(candidate) < len(data) {
|
||||
return candidate, nil
|
||||
}
|
||||
return data, nil
|
||||
}
|
||||
|
||||
// optimizeTIFFResource 压缩单目录TIFF，保留方向、透明度、采样精度及像素密度
|
||||
// 主图或单个瓦片的预计缓冲超限时保留原编码
|
||||
// 入参: ctx 取消上下文, data TIFF编码, options 压缩选项, size 显示像素需求
|
||||
// 返回: []byte 图片编码，不可完整转换时保留原文, error 编码或取消错误
|
||||
func optimizeTIFFResource(ctx context.Context, data []byte, options CompressionOptions, size image.Point) ([]byte, error) {
|
||||
layout, err := baseimage.ReadTIFFLayoutContext(ctx, bytes.NewReader(data))
|
||||
if err != nil {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
pixelSize := int64(layout.DecodedPixelBytes())
|
||||
if int64(layout.Width) > outputOptimizationBufferLimit/pixelSize/int64(layout.Height) {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
if layout.TileWidth != 0 && int64(layout.TileWidth) > outputOptimizationBufferLimit/pixelSize/int64(layout.TileHeight) {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
density, ok := baseimage.TIFFConversionDensity(data, layout)
|
||||
if !ok {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
pixels, err := baseimage.DecodeTIFF(ctx, data, layout)
|
||||
if err != nil {
|
||||
return data, ctx.Err()
|
||||
}
|
||||
return optimizeRasterResource(ctx, data, pixels, options, size, density)
|
||||
}
|
||||
@@ -1,149 +0,0 @@
|
||||
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package ofdgo
|
||||
|
||||
import (
|
||||
"context"
|
||||
"encoding/xml"
|
||||
"fmt"
|
||||
)
|
||||
|
||||
// drawParamXML 读取绘制参数原文，保留复杂颜色、扩展属性及命名空间
|
||||
// 入参: id 绘制参数标识
|
||||
// 返回: []byte 独立参数片段, error 错误信息
|
||||
func (e *Editor) drawParamXML(id string) ([]byte, error) {
|
||||
return e.drawParamXMLContext(context.Background(), id)
|
||||
}
|
||||
|
||||
// drawParamXMLContext 读取并提取绘制参数原文，保留扩展信息并响应取消
|
||||
// 入参: ctx 取消上下文, id 绘制参数标识
|
||||
// 返回: []byte 独立参数片段, error 读取、解析或取消错误
|
||||
func (e *Editor) drawParamXMLContext(ctx context.Context, id string) ([]byte, error) {
|
||||
if err := ctx.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var data []byte
|
||||
for _, resource := range e.resources {
|
||||
if resource.draw != nil && sameResourceID(resource.draw.ID, id) {
|
||||
data = resource.data
|
||||
break
|
||||
}
|
||||
}
|
||||
if data == nil && e.source != nil {
|
||||
var err error
|
||||
name, _ := resourceValue(e.source.reader.resourceFiles, id)
|
||||
data, err = e.source.reader.readFileViewContext(ctx, name)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
root, err := parseEditorXMLContext(ctx, data)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if node := editorResourceNode(root, "DrawParams", "DrawParam", id); node != nil {
|
||||
fragment, err := editorXMLStandaloneContext(ctx, data[node.start:node.end], node)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := ctx.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return fragment, nil
|
||||
}
|
||||
return nil, fmt.Errorf("draw parameter %q not found", id)
|
||||
}
|
||||
|
||||
// copyDrawParam 将原绘制参数继承链接到独立基准，复用相同副本且不改写原资源
|
||||
// 入参: id 源参数标识, base 独立基准标识, visited 当前继承链
|
||||
// 返回: string 新继承链末端标识, error 错误信息
|
||||
func (e *Editor) copyDrawParam(id, base string, visited map[string]bool) (string, error) {
|
||||
if id == "" || sameResourceID(id, base) {
|
||||
return base, nil
|
||||
}
|
||||
key := id
|
||||
if value := editorResourceID(id); value != "" {
|
||||
key = value
|
||||
}
|
||||
if visited[key] {
|
||||
return "", fmt.Errorf("cyclic draw parameter %q", id)
|
||||
}
|
||||
visited[key] = true
|
||||
data, err := e.drawParamXML(id)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
root, err := parseEditorXML(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if sameResourceID(root.attr("Relative"), base) {
|
||||
return id, nil
|
||||
}
|
||||
base, err = e.copyDrawParam(root.attr("Relative"), base, visited)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
for _, resource := range e.resources {
|
||||
if sameResourceID(resource.drawSource, id) && sameResourceID(resource.draw.Relative, base) {
|
||||
return resource.draw.ID, nil
|
||||
}
|
||||
}
|
||||
if !editorXMLCopyable(root) {
|
||||
return "", fmt.Errorf("draw parameter contains unsupported identifiers")
|
||||
}
|
||||
before, err := editorXMLContainer("DrawParam", ofdAttrs{{Name: xml.Name{Local: "Relative"}, Value: root.attr("Relative")}}, nil)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
after, err := editorXMLContainer("DrawParam", ofdAttrs{{Name: xml.Name{Local: "Relative"}, Value: base}}, nil)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLMerge(data, root, before, after)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
root, err = parseEditorXML(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
ids := make(map[string]string)
|
||||
if err := e.collectCompositeIDs(root, ids); err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLRemapIDs(data, root, ids)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
var draw DrawParam
|
||||
if err := xml.Unmarshal(data, &draw); err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLContainer("DrawParams", nil, data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLContainer("Res", ofdAttrs{{Name: xml.Name{Local: "BaseLoc"}, Value: "."}}, data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
refs, err := editorResourceReferences(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
e.resources = append(e.resources, editorResource{name: e.packageName("Res/DrawParams/DrawParam_" + draw.ID + ".xml"), data: data, draw: &draw, drawSource: id, references: refs})
|
||||
return draw.ID, nil
|
||||
}
|
||||
@@ -613,3 +613,131 @@ func validateResourceStyleGraph(ctx context.Context, catalog *resourceCatalog, i
|
||||
}
|
||||
return visit(resourceStyleReference{key: id})
|
||||
}
|
||||
|
||||
// drawParamXML 读取绘制参数原文，保留复杂颜色、扩展属性及命名空间
|
||||
// 入参: id 绘制参数标识
|
||||
// 返回: []byte 独立参数片段, error 错误信息
|
||||
func (e *Editor) drawParamXML(id string) ([]byte, error) {
|
||||
return e.drawParamXMLContext(context.Background(), id)
|
||||
}
|
||||
|
||||
// drawParamXMLContext 读取并提取绘制参数原文，保留扩展信息并响应取消
|
||||
// 入参: ctx 取消上下文, id 绘制参数标识
|
||||
// 返回: []byte 独立参数片段, error 读取、解析或取消错误
|
||||
func (e *Editor) drawParamXMLContext(ctx context.Context, id string) ([]byte, error) {
|
||||
if err := ctx.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var data []byte
|
||||
for _, resource := range e.resources {
|
||||
if resource.draw != nil && sameResourceID(resource.draw.ID, id) {
|
||||
data = resource.data
|
||||
break
|
||||
}
|
||||
}
|
||||
if data == nil && e.source != nil {
|
||||
var err error
|
||||
name, _ := resourceValue(e.source.reader.resourceFiles, id)
|
||||
data, err = e.source.reader.readFileViewContext(ctx, name)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
root, err := parseEditorXMLContext(ctx, data)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if node := editorResourceNode(root, "DrawParams", "DrawParam", id); node != nil {
|
||||
fragment, err := editorXMLStandaloneContext(ctx, data[node.start:node.end], node)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := ctx.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return fragment, nil
|
||||
}
|
||||
return nil, fmt.Errorf("draw parameter %q not found", id)
|
||||
}
|
||||
|
||||
// copyDrawParam 将原绘制参数继承链接到独立基准，复用相同副本且不改写原资源
|
||||
// 入参: id 源参数标识, base 独立基准标识, visited 当前继承链
|
||||
// 返回: string 新继承链末端标识, error 错误信息
|
||||
func (e *Editor) copyDrawParam(id, base string, visited map[string]bool) (string, error) {
|
||||
if id == "" || sameResourceID(id, base) {
|
||||
return base, nil
|
||||
}
|
||||
key := id
|
||||
if value := editorResourceID(id); value != "" {
|
||||
key = value
|
||||
}
|
||||
if visited[key] {
|
||||
return "", fmt.Errorf("cyclic draw parameter %q", id)
|
||||
}
|
||||
visited[key] = true
|
||||
data, err := e.drawParamXML(id)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
root, err := parseEditorXML(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if sameResourceID(root.attr("Relative"), base) {
|
||||
return id, nil
|
||||
}
|
||||
base, err = e.copyDrawParam(root.attr("Relative"), base, visited)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
for _, resource := range e.resources {
|
||||
if sameResourceID(resource.drawSource, id) && sameResourceID(resource.draw.Relative, base) {
|
||||
return resource.draw.ID, nil
|
||||
}
|
||||
}
|
||||
if !editorXMLCopyable(root) {
|
||||
return "", fmt.Errorf("draw parameter contains unsupported identifiers")
|
||||
}
|
||||
before, err := editorXMLContainer("DrawParam", ofdAttrs{{Name: xml.Name{Local: "Relative"}, Value: root.attr("Relative")}}, nil)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
after, err := editorXMLContainer("DrawParam", ofdAttrs{{Name: xml.Name{Local: "Relative"}, Value: base}}, nil)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLMerge(data, root, before, after)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
root, err = parseEditorXML(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
ids := make(map[string]string)
|
||||
if err := e.collectCompositeIDs(root, ids); err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLRemapIDs(data, root, ids)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
var draw DrawParam
|
||||
if err := xml.Unmarshal(data, &draw); err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLContainer("DrawParams", nil, data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
data, err = editorXMLContainer("Res", ofdAttrs{{Name: xml.Name{Local: "BaseLoc"}, Value: "."}}, data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
refs, err := editorResourceReferences(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
e.resources = append(e.resources, editorResource{name: e.packageName("Res/DrawParams/DrawParam_" + draw.ID + ".xml"), data: data, draw: &draw, drawSource: id, references: refs})
|
||||
return draw.ID, nil
|
||||
}
|
||||
+109
@@ -21,6 +21,18 @@ import (
|
||||
"slices"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
|
||||
)
|
||||
|
||||
// 画刷类型，区分纯色、渐变和图案填充
|
||||
const (
|
||||
PaintNone PaintKind = iota
|
||||
PaintSolid
|
||||
PaintLinear
|
||||
PaintRadial
|
||||
PaintPattern
|
||||
PaintMesh
|
||||
)
|
||||
|
||||
// PatternPaint 底纹画刷
|
||||
@@ -36,6 +48,36 @@ type profileGradient struct {
|
||||
colors []MeshVertex
|
||||
}
|
||||
|
||||
// ColorStop 保存渐变区间位置及预乘RGBA颜色节点
|
||||
type ColorStop struct {
|
||||
Offset float64
|
||||
Color color.RGBA
|
||||
}
|
||||
|
||||
// PaintKind 区分无画刷、纯色、轴向渐变、径向渐变、图案和网格渐变
|
||||
type PaintKind uint8
|
||||
|
||||
// Paint 保存后端无关的颜色、渐变和图案，不修改源节点
|
||||
type Paint struct {
|
||||
Kind PaintKind
|
||||
Color color.RGBA
|
||||
Gradient *Shading
|
||||
Pattern *PatternPaint
|
||||
Mesh *MeshShading
|
||||
}
|
||||
|
||||
// Shading 保存OFD对象局部坐标中的渐变，单位为毫米，纵轴向下
|
||||
// Extend、MapType和MapUnit保留标准的延伸及重复语义
|
||||
// Sample存在时按单位区间采样源颜色变换，Stops仍保存各段的显示颜色
|
||||
type Shading struct {
|
||||
Start, End Point
|
||||
StartRadius, EndRadius float64
|
||||
Stops []ColorStop
|
||||
Extend, MapType string
|
||||
MapUnit, Eccentricity, Angle float64
|
||||
Sample func(float64) color.RGBA
|
||||
}
|
||||
|
||||
// ResolveColor 按文档颜色空间和调色板解析颜色，返回预乘透明度的RGBA
|
||||
// 入参: value 颜色分量, index 调色板索引, space 颜色空间标识, alpha 透明度
|
||||
// 返回: color.RGBA 标准颜色, error 颜色定义或配置错误
|
||||
@@ -467,3 +509,70 @@ func (g *profileGradient) At(t float64) color.RGBA {
|
||||
r, green, b := last.rgb(last.Values)
|
||||
return profileColor([3]float64{r, green, b}, last.Alpha)
|
||||
}
|
||||
|
||||
// ResolvePaint 解析颜色、透明度、渐变分段和图案，不依赖绘图库
|
||||
// 入参: fill 填充或转换后的描边节点
|
||||
// 返回: Paint 只读画刷, error 无效渐变
|
||||
func (r *Renderer) ResolvePaint(fill *FillColor) (Paint, error) {
|
||||
previous := r.renderError
|
||||
r.renderError = nil
|
||||
defer func() { r.renderError = previous }()
|
||||
if fill == nil {
|
||||
return Paint{}, nil
|
||||
}
|
||||
if fill.Pattern != nil {
|
||||
return Paint{Kind: PaintPattern, Pattern: parsePatternPaint(fill)}, nil
|
||||
}
|
||||
if fill.GouraudShd != nil || fill.LaGouraudShd != nil {
|
||||
mesh, err := r.resolveMesh(fill)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
return Paint{Kind: PaintMesh, Mesh: mesh}, nil
|
||||
}
|
||||
base := r.parseFillColor(fill)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
if base == nil {
|
||||
return Paint{}, nil
|
||||
}
|
||||
paint := Paint{Kind: PaintSolid, Color: colorToRGBA(base)}
|
||||
if node := fill.AxialShd; node != nil {
|
||||
start, end := parseFloats(node.StartPoint), parseFloats(node.EndPoint)
|
||||
stops := r.renderGradientStops(node.Segment, fill.Alpha)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
sample, err := r.profileGradient(node.Segment, fill.Alpha)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if len(start) >= 2 && len(end) >= 2 && len(stops) != 0 && (!basegeom.Equal(start[0], end[0]) || !basegeom.Equal(start[1], end[1])) {
|
||||
paint.Kind = PaintLinear
|
||||
paint.Gradient = &Shading{Start: Point{X: start[0], Y: start[1]}, End: Point{X: end[0], Y: end[1]}, Stops: stops, Extend: node.Extend, MapType: node.MapType, MapUnit: node.MapUnit}
|
||||
paint.Gradient.Sample = sample
|
||||
return paint, nil
|
||||
}
|
||||
}
|
||||
if node := fill.RadialShd; node != nil && node.EndRadius > 0 {
|
||||
start, end := parseFloats(node.StartPoint), parseFloats(node.EndPoint)
|
||||
stops := r.renderGradientStops(node.Segment, fill.Alpha)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
sample, err := r.profileGradient(node.Segment, fill.Alpha)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if len(start) >= 2 && len(end) >= 2 && len(stops) != 0 {
|
||||
paint.Kind = PaintRadial
|
||||
paint.Gradient = &Shading{Start: Point{X: start[0], Y: start[1]}, End: Point{X: end[0], Y: end[1]}, StartRadius: node.StartRadius, EndRadius: node.EndRadius, Stops: stops, Extend: node.Extend, MapType: node.MapType, MapUnit: node.MapUnit, Eccentricity: node.Eccentricity, Angle: node.Angle}
|
||||
paint.Gradient.Sample = sample
|
||||
}
|
||||
}
|
||||
return paint, nil
|
||||
}
|
||||
@@ -1,127 +0,0 @@
|
||||
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package ofdgo
|
||||
|
||||
import (
|
||||
basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
|
||||
"image/color"
|
||||
)
|
||||
|
||||
// 画刷类型，区分纯色、渐变和图案填充
|
||||
const (
|
||||
PaintNone PaintKind = iota
|
||||
PaintSolid
|
||||
PaintLinear
|
||||
PaintRadial
|
||||
PaintPattern
|
||||
PaintMesh
|
||||
)
|
||||
|
||||
// ColorStop 保存渐变区间位置及预乘RGBA颜色节点
|
||||
type ColorStop struct {
|
||||
Offset float64
|
||||
Color color.RGBA
|
||||
}
|
||||
|
||||
// PaintKind 区分无画刷、纯色、轴向渐变、径向渐变、图案和网格渐变
|
||||
type PaintKind uint8
|
||||
|
||||
// Paint 保存后端无关的颜色、渐变和图案，不修改源节点
|
||||
type Paint struct {
|
||||
Kind PaintKind
|
||||
Color color.RGBA
|
||||
Gradient *Shading
|
||||
Pattern *PatternPaint
|
||||
Mesh *MeshShading
|
||||
}
|
||||
|
||||
// Shading 保存OFD对象局部坐标中的渐变，单位为毫米，纵轴向下
|
||||
// Extend、MapType和MapUnit保留标准的延伸及重复语义
|
||||
// Sample存在时按单位区间采样源颜色变换，Stops仍保存各段的显示颜色
|
||||
type Shading struct {
|
||||
Start, End Point
|
||||
StartRadius, EndRadius float64
|
||||
Stops []ColorStop
|
||||
Extend, MapType string
|
||||
MapUnit, Eccentricity, Angle float64
|
||||
Sample func(float64) color.RGBA
|
||||
}
|
||||
|
||||
// ResolvePaint 解析颜色、透明度、渐变分段和图案，不依赖绘图库
|
||||
// 入参: fill 填充或转换后的描边节点
|
||||
// 返回: Paint 只读画刷, error 无效渐变
|
||||
func (r *Renderer) ResolvePaint(fill *FillColor) (Paint, error) {
|
||||
previous := r.renderError
|
||||
r.renderError = nil
|
||||
defer func() { r.renderError = previous }()
|
||||
if fill == nil {
|
||||
return Paint{}, nil
|
||||
}
|
||||
if fill.Pattern != nil {
|
||||
return Paint{Kind: PaintPattern, Pattern: parsePatternPaint(fill)}, nil
|
||||
}
|
||||
if fill.GouraudShd != nil || fill.LaGouraudShd != nil {
|
||||
mesh, err := r.resolveMesh(fill)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
return Paint{Kind: PaintMesh, Mesh: mesh}, nil
|
||||
}
|
||||
base := r.parseFillColor(fill)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
if base == nil {
|
||||
return Paint{}, nil
|
||||
}
|
||||
paint := Paint{Kind: PaintSolid, Color: colorToRGBA(base)}
|
||||
if node := fill.AxialShd; node != nil {
|
||||
start, end := parseFloats(node.StartPoint), parseFloats(node.EndPoint)
|
||||
stops := r.renderGradientStops(node.Segment, fill.Alpha)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
sample, err := r.profileGradient(node.Segment, fill.Alpha)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if len(start) >= 2 && len(end) >= 2 && len(stops) != 0 && (!basegeom.Equal(start[0], end[0]) || !basegeom.Equal(start[1], end[1])) {
|
||||
paint.Kind = PaintLinear
|
||||
paint.Gradient = &Shading{Start: Point{X: start[0], Y: start[1]}, End: Point{X: end[0], Y: end[1]}, Stops: stops, Extend: node.Extend, MapType: node.MapType, MapUnit: node.MapUnit}
|
||||
paint.Gradient.Sample = sample
|
||||
return paint, nil
|
||||
}
|
||||
}
|
||||
if node := fill.RadialShd; node != nil && node.EndRadius > 0 {
|
||||
start, end := parseFloats(node.StartPoint), parseFloats(node.EndPoint)
|
||||
stops := r.renderGradientStops(node.Segment, fill.Alpha)
|
||||
if r.renderError != nil {
|
||||
return Paint{}, r.renderError
|
||||
}
|
||||
sample, err := r.profileGradient(node.Segment, fill.Alpha)
|
||||
if err != nil {
|
||||
return Paint{}, err
|
||||
}
|
||||
if len(start) >= 2 && len(end) >= 2 && len(stops) != 0 {
|
||||
paint.Kind = PaintRadial
|
||||
paint.Gradient = &Shading{Start: Point{X: start[0], Y: start[1]}, End: Point{X: end[0], Y: end[1]}, StartRadius: node.StartRadius, EndRadius: node.EndRadius, Stops: stops, Extend: node.Extend, MapType: node.MapType, MapUnit: node.MapUnit, Eccentricity: node.Eccentricity, Angle: node.Angle}
|
||||
paint.Gradient.Sample = sample
|
||||
}
|
||||
}
|
||||
return paint, nil
|
||||
}
|
||||
+111
-1
@@ -14,7 +14,21 @@
|
||||
|
||||
package ofdgo
|
||||
|
||||
import "fmt"
|
||||
import (
|
||||
"fmt"
|
||||
)
|
||||
|
||||
// ObjectContour 页面坐标中的填充轮廓，Path为SVG路径，EvenOdd表示奇偶填充
|
||||
type ObjectContour struct {
|
||||
Path string `json:"path"`
|
||||
EvenOdd bool `json:"evenOdd,omitempty"`
|
||||
}
|
||||
|
||||
// annotationMeasurement 按注解绘制顺序收集对象范围和轮廓
|
||||
type annotationMeasurement struct {
|
||||
renderer *Renderer
|
||||
result ObjectMeasurement
|
||||
}
|
||||
|
||||
// RenderPage 编译页面为与绘图库无关的只读绘制数据
|
||||
// 入参: page 页面内容
|
||||
@@ -190,3 +204,99 @@ func (r *Renderer) RenderPageByIndex(index int) (*RasterPage, error) {
|
||||
}
|
||||
return r.RenderPage(page)
|
||||
}
|
||||
|
||||
// ObjectBounds 获取文字、路径、图片或复合对象在页面坐标中的轴对齐范围，不修改对象
|
||||
// 文字采用字形范围，路径包含描边与裁剪，图片采用裁剪后的几何范围，不解码像素或排除透明像素
|
||||
// 底纹按填充或描边轮廓度量，不展开图案单元
|
||||
// 不应用页面边界或父级变换；无可见范围时返回零值，不支持的对象类型返回错误
|
||||
// 入参: object 图形对象, drawParam 图层绘制参数标识，无继承时为空
|
||||
// 返回: Box 毫米坐标范围, error 错误信息
|
||||
func (r *Renderer) ObjectBounds(object GraphicObject, drawParam string) (Box, error) {
|
||||
result, err := r.MeasureObject(object, MeasureOptions{Defaults: r.drawParamDefaults(drawParam, nil)})
|
||||
return result.Bounds, err
|
||||
}
|
||||
|
||||
// AnnotationGeometry 获取注解外观的实际内容轮廓，不将Appearance容器边界视为绘制内容
|
||||
// 链接保留透明对象定义的交互区域，图片按几何范围度量而不解码透明像素
|
||||
// 入参: annotation 注解
|
||||
// 返回: Box 页面范围, []ObjectContour 命中轮廓, error 错误信息
|
||||
func (r *Renderer) AnnotationGeometry(annotation Annotation) (Box, []ObjectContour, error) {
|
||||
measurement := &annotationMeasurement{renderer: r}
|
||||
if err := r.walkAnnotation(annotation, measurement); err != nil {
|
||||
return Box{}, nil, err
|
||||
}
|
||||
box, contours := measurement.result.Bounds, measurement.result.Contours
|
||||
for _, source := range r.annotationActionSources([]Annotation{annotation}) {
|
||||
for _, action := range source.Actions {
|
||||
if action.Event != "CLICK" {
|
||||
continue
|
||||
}
|
||||
region, path, err := r.actionLinkRegion(source, action)
|
||||
if err != nil {
|
||||
return Box{}, nil, err
|
||||
}
|
||||
if region.W <= 0 || region.H <= 0 {
|
||||
continue
|
||||
}
|
||||
if path == "" {
|
||||
path = fmt.Sprintf("M%g %gH%gV%gH%gZ", region.X, region.Y, region.X+region.W, region.Y+region.H, region.X)
|
||||
}
|
||||
box = unionTextBox(box, region)
|
||||
contours = append(contours, ObjectContour{Path: path})
|
||||
}
|
||||
}
|
||||
return box, contours, nil
|
||||
}
|
||||
|
||||
// DrawObject 使用对象实际继承状态度量注解内容，不附加容器裁剪
|
||||
// 入参: object 图形对象, state 绘制状态
|
||||
// 返回: error 度量错误
|
||||
func (m *annotationMeasurement) DrawObject(object *GraphicObject, state RenderState) error {
|
||||
if state.Hidden {
|
||||
return nil
|
||||
}
|
||||
result, err := m.renderer.MeasureObject(*object, MeasureOptions{Defaults: state.Defaults, Parent: state.Parent, BoundaryInCTM: state.BoundaryInCTM, Clip: state.Clip, Contours: true})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
m.result.Bounds = unionTextBox(m.result.Bounds, result.Bounds)
|
||||
m.result.Contours = append(m.result.Contours, result.Contours...)
|
||||
return nil
|
||||
}
|
||||
|
||||
// DrawStamp 满足页面访问接口，注解外观遍历不包含数字签章
|
||||
// 入参: stamp 数字签章
|
||||
// 返回: error 始终为空
|
||||
func (m *annotationMeasurement) DrawStamp(stamp Stamp) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// ObjectContours 获取路径、图片或复合对象的实际绘制区域，包含描边、虚线、变换及对象裁剪
|
||||
// 图片不解码像素，底纹不展开图案单元；不包含页面边界或父级变换
|
||||
// 入参: object 路径、图片或复合对象, drawParam 图层绘制参数标识
|
||||
// 返回: []ObjectContour 可用于点选的轮廓, error 错误信息
|
||||
func (r *Renderer) ObjectContours(object GraphicObject, drawParam string) ([]ObjectContour, error) {
|
||||
_, contours, err := r.ObjectGeometry(object, drawParam)
|
||||
return contours, err
|
||||
}
|
||||
|
||||
// ObjectGeometry 一次度量路径、图片或复合对象的范围与轮廓，语义与ObjectBounds和ObjectContours一致
|
||||
// 入参: object 图形对象, drawParam 图层绘制参数标识
|
||||
// 返回: Box 毫米范围, []ObjectContour 绘制轮廓, error 错误信息
|
||||
func (r *Renderer) ObjectGeometry(object GraphicObject, drawParam string) (Box, []ObjectContour, error) {
|
||||
if object.Type != "PathObject" && object.Type != "ImageObject" && object.Type != "CompositeObject" && object.Type != "CompositeGraphicUnit" {
|
||||
return Box{}, nil, fmt.Errorf("contours require a path, image or composite object")
|
||||
}
|
||||
result, err := r.MeasureObject(object, MeasureOptions{Defaults: r.drawParamDefaults(drawParam, nil), Contours: true})
|
||||
return result.Bounds, result.Contours, err
|
||||
}
|
||||
|
||||
// MeasureObject 使用当前页面编译器度量对象，保持绘制与选区的字体和几何语义一致
|
||||
// 入参: object 图形对象, options 度量上下文
|
||||
// 返回: ObjectMeasurement 度量结果, error 错误信息
|
||||
func (r *Renderer) MeasureObject(object GraphicObject, options MeasureOptions) (ObjectMeasurement, error) {
|
||||
if r.backends.Compiler == nil {
|
||||
return ObjectMeasurement{}, fmt.Errorf("%w: object measurement", ErrBackendUnavailable)
|
||||
}
|
||||
return r.backends.Compiler.MeasureObject(r, object, options)
|
||||
}
|
||||
@@ -1,125 +0,0 @@
|
||||
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package ofdgo
|
||||
|
||||
import "fmt"
|
||||
|
||||
// ObjectContour 页面坐标中的填充轮廓，Path为SVG路径，EvenOdd表示奇偶填充
|
||||
type ObjectContour struct {
|
||||
Path string `json:"path"`
|
||||
EvenOdd bool `json:"evenOdd,omitempty"`
|
||||
}
|
||||
|
||||
// annotationMeasurement 按注解绘制顺序收集对象范围和轮廓
|
||||
type annotationMeasurement struct {
|
||||
renderer *Renderer
|
||||
result ObjectMeasurement
|
||||
}
|
||||
|
||||
// ObjectBounds 获取文字、路径、图片或复合对象在页面坐标中的轴对齐范围，不修改对象
|
||||
// 文字采用字形范围，路径包含描边与裁剪，图片采用裁剪后的几何范围，不解码像素或排除透明像素
|
||||
// 底纹按填充或描边轮廓度量，不展开图案单元
|
||||
// 不应用页面边界或父级变换；无可见范围时返回零值，不支持的对象类型返回错误
|
||||
// 入参: object 图形对象, drawParam 图层绘制参数标识，无继承时为空
|
||||
// 返回: Box 毫米坐标范围, error 错误信息
|
||||
func (r *Renderer) ObjectBounds(object GraphicObject, drawParam string) (Box, error) {
|
||||
result, err := r.MeasureObject(object, MeasureOptions{Defaults: r.drawParamDefaults(drawParam, nil)})
|
||||
return result.Bounds, err
|
||||
}
|
||||
|
||||
// AnnotationGeometry 获取注解外观的实际内容轮廓，不将Appearance容器边界视为绘制内容
|
||||
// 链接保留透明对象定义的交互区域，图片按几何范围度量而不解码透明像素
|
||||
// 入参: annotation 注解
|
||||
// 返回: Box 页面范围, []ObjectContour 命中轮廓, error 错误信息
|
||||
func (r *Renderer) AnnotationGeometry(annotation Annotation) (Box, []ObjectContour, error) {
|
||||
measurement := &annotationMeasurement{renderer: r}
|
||||
if err := r.walkAnnotation(annotation, measurement); err != nil {
|
||||
return Box{}, nil, err
|
||||
}
|
||||
box, contours := measurement.result.Bounds, measurement.result.Contours
|
||||
for _, source := range r.annotationActionSources([]Annotation{annotation}) {
|
||||
for _, action := range source.Actions {
|
||||
if action.Event != "CLICK" {
|
||||
continue
|
||||
}
|
||||
region, path, err := r.actionLinkRegion(source, action)
|
||||
if err != nil {
|
||||
return Box{}, nil, err
|
||||
}
|
||||
if region.W <= 0 || region.H <= 0 {
|
||||
continue
|
||||
}
|
||||
if path == "" {
|
||||
path = fmt.Sprintf("M%g %gH%gV%gH%gZ", region.X, region.Y, region.X+region.W, region.Y+region.H, region.X)
|
||||
}
|
||||
box = unionTextBox(box, region)
|
||||
contours = append(contours, ObjectContour{Path: path})
|
||||
}
|
||||
}
|
||||
return box, contours, nil
|
||||
}
|
||||
|
||||
// DrawObject 使用对象实际继承状态度量注解内容，不附加容器裁剪
|
||||
// 入参: object 图形对象, state 绘制状态
|
||||
// 返回: error 度量错误
|
||||
func (m *annotationMeasurement) DrawObject(object *GraphicObject, state RenderState) error {
|
||||
if state.Hidden {
|
||||
return nil
|
||||
}
|
||||
result, err := m.renderer.MeasureObject(*object, MeasureOptions{Defaults: state.Defaults, Parent: state.Parent, BoundaryInCTM: state.BoundaryInCTM, Clip: state.Clip, Contours: true})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
m.result.Bounds = unionTextBox(m.result.Bounds, result.Bounds)
|
||||
m.result.Contours = append(m.result.Contours, result.Contours...)
|
||||
return nil
|
||||
}
|
||||
|
||||
// DrawStamp 满足页面访问接口，注解外观遍历不包含数字签章
|
||||
// 入参: stamp 数字签章
|
||||
// 返回: error 始终为空
|
||||
func (m *annotationMeasurement) DrawStamp(stamp Stamp) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// ObjectContours 获取路径、图片或复合对象的实际绘制区域，包含描边、虚线、变换及对象裁剪
|
||||
// 图片不解码像素，底纹不展开图案单元；不包含页面边界或父级变换
|
||||
// 入参: object 路径、图片或复合对象, drawParam 图层绘制参数标识
|
||||
// 返回: []ObjectContour 可用于点选的轮廓, error 错误信息
|
||||
func (r *Renderer) ObjectContours(object GraphicObject, drawParam string) ([]ObjectContour, error) {
|
||||
_, contours, err := r.ObjectGeometry(object, drawParam)
|
||||
return contours, err
|
||||
}
|
||||
|
||||
// ObjectGeometry 一次度量路径、图片或复合对象的范围与轮廓，语义与ObjectBounds和ObjectContours一致
|
||||
// 入参: object 图形对象, drawParam 图层绘制参数标识
|
||||
// 返回: Box 毫米范围, []ObjectContour 绘制轮廓, error 错误信息
|
||||
func (r *Renderer) ObjectGeometry(object GraphicObject, drawParam string) (Box, []ObjectContour, error) {
|
||||
if object.Type != "PathObject" && object.Type != "ImageObject" && object.Type != "CompositeObject" && object.Type != "CompositeGraphicUnit" {
|
||||
return Box{}, nil, fmt.Errorf("contours require a path, image or composite object")
|
||||
}
|
||||
result, err := r.MeasureObject(object, MeasureOptions{Defaults: r.drawParamDefaults(drawParam, nil), Contours: true})
|
||||
return result.Bounds, result.Contours, err
|
||||
}
|
||||
|
||||
// MeasureObject 使用当前页面编译器度量对象，保持绘制与选区的字体和几何语义一致
|
||||
// 入参: object 图形对象, options 度量上下文
|
||||
// 返回: ObjectMeasurement 度量结果, error 错误信息
|
||||
func (r *Renderer) MeasureObject(object GraphicObject, options MeasureOptions) (ObjectMeasurement, error) {
|
||||
if r.backends.Compiler == nil {
|
||||
return ObjectMeasurement{}, fmt.Errorf("%w: object measurement", ErrBackendUnavailable)
|
||||
}
|
||||
return r.backends.Compiler.MeasureObject(r, object, options)
|
||||
}
|
||||
@@ -578,3 +578,97 @@ func (OFDCompiler) MeasureObject(r *Renderer, object GraphicObject, options Meas
|
||||
err = r.WalkObject(&object, RenderState{Defaults: options.Defaults, Parent: options.Parent, BoundaryInCTM: options.BoundaryInCTM, Clip: options.Clip}, c)
|
||||
return c.measurement, err
|
||||
}
|
||||
|
||||
// reflectShdPosition 获取镜像周期内的位置
|
||||
// 入参: position 渐变位置
|
||||
// 返回: float64 周期内的位置
|
||||
func reflectShdPosition(position float64) float64 {
|
||||
index := math.Floor(position)
|
||||
position -= index
|
||||
if math.Mod(index, 2) != 0 {
|
||||
return 1 - position
|
||||
}
|
||||
return position
|
||||
}
|
||||
|
||||
// shadingClip 按渐变延伸规则裁剪绘制与选区，避免只在采样时隐藏区间外像素
|
||||
// 入参: path 页面路径, paint 渐变画刷, matrix 渐变父矩阵
|
||||
// 返回: GeometryPath 可见路径, error 几何错误
|
||||
func (c *semanticCompiler) shadingClip(path GeometryPath, paint Paint, matrix Matrix) (GeometryPath, error) {
|
||||
gradient, view := semanticGradient(paint, matrix)
|
||||
spread := gradient.Spread
|
||||
if gradient.Kind == RasterRadial && math.Hypot(gradient.End.X-gradient.Start.X, gradient.End.Y-gradient.Start.Y) >= math.Abs(gradient.R1-gradient.R0) {
|
||||
return path, nil
|
||||
}
|
||||
if spread == nil || spread.Extend == 3 {
|
||||
return path, nil
|
||||
}
|
||||
inverse, ok := view.Invert()
|
||||
if !ok {
|
||||
return nil, nil
|
||||
}
|
||||
local, err := c.geometry.Transform(path, inverse)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if gradient.Kind == RasterLinear {
|
||||
dx, dy := gradient.End.X-gradient.Start.X, gradient.End.Y-gradient.Start.Y
|
||||
axis := Matrix{a: dx, b: dy, c: -dy, d: dx, e: gradient.Start.X, f: gradient.Start.Y}
|
||||
inv, _ := axis.Invert()
|
||||
box, err := c.geometry.Bounds(local)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
box = inv.TransformBox(box)
|
||||
end := box.X + box.W
|
||||
if spread.Extend&1 == 0 {
|
||||
box.X = math.Max(box.X, 0)
|
||||
}
|
||||
if spread.Extend&2 == 0 {
|
||||
end = math.Min(end, 1)
|
||||
}
|
||||
box.W = end - box.X
|
||||
if box.W <= 0 {
|
||||
return nil, nil
|
||||
}
|
||||
clip, err := c.geometry.Transform(GeometryPath(basegeom.Rectangle(box)), axis)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
local, err = c.geometry.Combine(local, clip, GeometryIntersect)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else {
|
||||
inner, outer, r0, r1, extend := gradient.Start, gradient.End, gradient.R0, gradient.R1, spread.Extend
|
||||
if r1 < r0 {
|
||||
inner, outer, r0, r1 = outer, inner, r1, r0
|
||||
extend = (extend&1)<<1 | (extend&2)>>1
|
||||
}
|
||||
if extend&2 == 0 {
|
||||
local, err = c.geometry.Combine(local, geometryCircle(outer, r1), GeometryIntersect)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
if extend&1 == 0 && r0 > 0 {
|
||||
local, err = c.geometry.Combine(local, geometryCircle(inner, r0), GeometrySubtract)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
}
|
||||
return c.geometry.Transform(local, view)
|
||||
}
|
||||
|
||||
// geometryCircle 构建标准圆弧，不提前折线化
|
||||
// 入参: center 圆心, radius 半径
|
||||
// 返回: GeometryPath 圆路径
|
||||
func geometryCircle(center RasterPoint, radius float64) GeometryPath {
|
||||
return GeometryPath{
|
||||
{Verb: GeometryMove, End: Point{X: center.X + radius, Y: center.Y}},
|
||||
{Verb: GeometryArc, RadiusX: radius, RadiusY: radius, Sweep: true, End: Point{X: center.X - radius, Y: center.Y}},
|
||||
{Verb: GeometryArc, RadiusX: radius, RadiusY: radius, Sweep: true, End: Point{X: center.X + radius, Y: center.Y}},
|
||||
{Verb: GeometryClose},
|
||||
}
|
||||
}
|
||||
@@ -1,114 +0,0 @@
|
||||
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package ofdgo
|
||||
|
||||
import (
|
||||
basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
|
||||
"math"
|
||||
)
|
||||
|
||||
// reflectShdPosition 获取镜像周期内的位置
|
||||
// 入参: position 渐变位置
|
||||
// 返回: float64 周期内的位置
|
||||
func reflectShdPosition(position float64) float64 {
|
||||
index := math.Floor(position)
|
||||
position -= index
|
||||
if math.Mod(index, 2) != 0 {
|
||||
return 1 - position
|
||||
}
|
||||
return position
|
||||
}
|
||||
|
||||
// shadingClip 按渐变延伸规则裁剪绘制与选区，避免只在采样时隐藏区间外像素
|
||||
// 入参: path 页面路径, paint 渐变画刷, matrix 渐变父矩阵
|
||||
// 返回: GeometryPath 可见路径, error 几何错误
|
||||
func (c *semanticCompiler) shadingClip(path GeometryPath, paint Paint, matrix Matrix) (GeometryPath, error) {
|
||||
gradient, view := semanticGradient(paint, matrix)
|
||||
spread := gradient.Spread
|
||||
if gradient.Kind == RasterRadial && math.Hypot(gradient.End.X-gradient.Start.X, gradient.End.Y-gradient.Start.Y) >= math.Abs(gradient.R1-gradient.R0) {
|
||||
return path, nil
|
||||
}
|
||||
if spread == nil || spread.Extend == 3 {
|
||||
return path, nil
|
||||
}
|
||||
inverse, ok := view.Invert()
|
||||
if !ok {
|
||||
return nil, nil
|
||||
}
|
||||
local, err := c.geometry.Transform(path, inverse)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if gradient.Kind == RasterLinear {
|
||||
dx, dy := gradient.End.X-gradient.Start.X, gradient.End.Y-gradient.Start.Y
|
||||
axis := Matrix{a: dx, b: dy, c: -dy, d: dx, e: gradient.Start.X, f: gradient.Start.Y}
|
||||
inv, _ := axis.Invert()
|
||||
box, err := c.geometry.Bounds(local)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
box = inv.TransformBox(box)
|
||||
end := box.X + box.W
|
||||
if spread.Extend&1 == 0 {
|
||||
box.X = math.Max(box.X, 0)
|
||||
}
|
||||
if spread.Extend&2 == 0 {
|
||||
end = math.Min(end, 1)
|
||||
}
|
||||
box.W = end - box.X
|
||||
if box.W <= 0 {
|
||||
return nil, nil
|
||||
}
|
||||
clip, err := c.geometry.Transform(GeometryPath(basegeom.Rectangle(box)), axis)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
local, err = c.geometry.Combine(local, clip, GeometryIntersect)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else {
|
||||
inner, outer, r0, r1, extend := gradient.Start, gradient.End, gradient.R0, gradient.R1, spread.Extend
|
||||
if r1 < r0 {
|
||||
inner, outer, r0, r1 = outer, inner, r1, r0
|
||||
extend = (extend&1)<<1 | (extend&2)>>1
|
||||
}
|
||||
if extend&2 == 0 {
|
||||
local, err = c.geometry.Combine(local, geometryCircle(outer, r1), GeometryIntersect)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
if extend&1 == 0 && r0 > 0 {
|
||||
local, err = c.geometry.Combine(local, geometryCircle(inner, r0), GeometrySubtract)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
}
|
||||
return c.geometry.Transform(local, view)
|
||||
}
|
||||
|
||||
// geometryCircle 构建标准圆弧，不提前折线化
|
||||
// 入参: center 圆心, radius 半径
|
||||
// 返回: GeometryPath 圆路径
|
||||
func geometryCircle(center RasterPoint, radius float64) GeometryPath {
|
||||
return GeometryPath{
|
||||
{Verb: GeometryMove, End: Point{X: center.X + radius, Y: center.Y}},
|
||||
{Verb: GeometryArc, RadiusX: radius, RadiusY: radius, Sweep: true, End: Point{X: center.X - radius, Y: center.Y}},
|
||||
{Verb: GeometryArc, RadiusX: radius, RadiusY: radius, Sweep: true, End: Point{X: center.X + radius, Y: center.Y}},
|
||||
{Verb: GeometryClose},
|
||||
}
|
||||
}
|
||||
@@ -1,104 +0,0 @@
|
||||
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
package ofdgo
|
||||
|
||||
import (
|
||||
"math"
|
||||
|
||||
"github.com/tdewolff/canvas"
|
||||
)
|
||||
|
||||
// parseFillPaint 将公共画刷转换为Canvas对象
|
||||
// 入参: fillColor 填充颜色节点, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: any 填充画刷
|
||||
func (r *Renderer) parseFillPaint(fillColor *FillColor, x, y, pageH float64) any {
|
||||
paint, err := r.ResolvePaint(fillColor)
|
||||
if err != nil {
|
||||
r.renderError = err
|
||||
return nil
|
||||
}
|
||||
switch paint.Kind {
|
||||
case PaintNone, PaintPattern:
|
||||
return nil
|
||||
case PaintLinear, PaintRadial:
|
||||
return canvasShading(paint, x, y, pageH)
|
||||
case PaintMesh:
|
||||
return &shdPaint{gradient: newRasterGradientCanvas(&RasterGradient{Kind: RasterMesh, Mesh: paint.Mesh}), view: canvas.Matrix{{1, 0, x}, {0, -1, pageH - y}}}
|
||||
default:
|
||||
return paint.Color
|
||||
}
|
||||
}
|
||||
|
||||
// parseStrokePaint 解析勾边画刷
|
||||
// 入参: strokeColor 勾边颜色节点, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: any 勾边画刷
|
||||
func (r *Renderer) parseStrokePaint(strokeColor *StrokeColor, x, y, pageH float64) any {
|
||||
return r.parseFillPaint((*FillColor)(strokeColor), x, y, pageH)
|
||||
}
|
||||
|
||||
// canvasGradient 将公共颜色节点转换为Canvas渐变
|
||||
// 入参: stops 渐变色标
|
||||
// 返回: canvas.Grad 渐变色标
|
||||
func canvasGradient(stops []ColorStop) canvas.Grad {
|
||||
var gradient canvas.Grad
|
||||
for _, stop := range stops {
|
||||
gradient.Add(stop.Offset, stop.Color)
|
||||
}
|
||||
return gradient
|
||||
}
|
||||
|
||||
// canvasShading 转换坐标与椭圆渐变变换，不重新解析OFD样式
|
||||
// 入参: paint 公共渐变画刷, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: *shdPaint Canvas渐变画刷
|
||||
func canvasShading(paint Paint, x, y, pageH float64) *shdPaint {
|
||||
source := paint.Gradient
|
||||
gradient := canvasGradient(source.Stops)
|
||||
start := canvas.Point{X: x + source.Start.X, Y: pageH - y - source.Start.Y}
|
||||
end := canvas.Point{X: x + source.End.X, Y: pageH - y - source.End.Y}
|
||||
if paint.Kind == PaintLinear {
|
||||
result := newShdPaint(gradient.ToLinear(start, end), source.Extend, source.MapType, source.MapUnit)
|
||||
result.sample = source.Sample
|
||||
return result
|
||||
}
|
||||
result := newShdPaint(gradient.ToRadial(start, source.StartRadius, end, source.EndRadius), source.Extend, source.MapType, source.MapUnit)
|
||||
result.sample = source.Sample
|
||||
if e := source.Eccentricity; 0 < e && e < 1 {
|
||||
result.view = canvas.Identity.Translate(start.X, start.Y).Rotate(-source.Angle).Scale(1, math.Sqrt(1-e*e)).Translate(-start.X, -start.Y)
|
||||
result.gradient = gradient.ToRadial(start, source.StartRadius, result.view.Inv().Dot(end), source.EndRadius)
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
// axialShdClip 获取轴向渐变的延伸裁剪区域
|
||||
// 入参: gradient 轴向渐变, extend 延伸方向, bounds 可见区域
|
||||
// 返回: *canvas.Path 裁剪区域
|
||||
func axialShdClip(gradient *canvas.LinearGradient, extend int, bounds canvas.Rect) *canvas.Path {
|
||||
if extend == 3 {
|
||||
return nil
|
||||
}
|
||||
d := gradient.End.Sub(gradient.Start)
|
||||
axis := canvas.Matrix{{d.X, -d.Y, gradient.Start.X}, {d.Y, d.X, gradient.Start.Y}}
|
||||
area := bounds.Transform(axis.Inv())
|
||||
if extend&1 == 0 {
|
||||
area.X0 = math.Max(area.X0, 0)
|
||||
}
|
||||
if extend&2 == 0 {
|
||||
area.X1 = math.Min(area.X1, 1)
|
||||
}
|
||||
if area.X1 <= area.X0 {
|
||||
return &canvas.Path{}
|
||||
}
|
||||
return area.ToPath().Transform(axis)
|
||||
}
|
||||
@@ -366,3 +366,86 @@ func reflectShdGrad(gradient canvas.Grad, period, lo, hi float64) canvas.Grad {
|
||||
}
|
||||
return append(result, canvas.Stop{Offset: 1, Color: gradient.At(reflectShdPosition(hi / period))})
|
||||
}
|
||||
|
||||
// parseFillPaint 将公共画刷转换为Canvas对象
|
||||
// 入参: fillColor 填充颜色节点, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: any 填充画刷
|
||||
func (r *Renderer) parseFillPaint(fillColor *FillColor, x, y, pageH float64) any {
|
||||
paint, err := r.ResolvePaint(fillColor)
|
||||
if err != nil {
|
||||
r.renderError = err
|
||||
return nil
|
||||
}
|
||||
switch paint.Kind {
|
||||
case PaintNone, PaintPattern:
|
||||
return nil
|
||||
case PaintLinear, PaintRadial:
|
||||
return canvasShading(paint, x, y, pageH)
|
||||
case PaintMesh:
|
||||
return &shdPaint{gradient: newRasterGradientCanvas(&RasterGradient{Kind: RasterMesh, Mesh: paint.Mesh}), view: canvas.Matrix{{1, 0, x}, {0, -1, pageH - y}}}
|
||||
default:
|
||||
return paint.Color
|
||||
}
|
||||
}
|
||||
|
||||
// parseStrokePaint 解析勾边画刷
|
||||
// 入参: strokeColor 勾边颜色节点, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: any 勾边画刷
|
||||
func (r *Renderer) parseStrokePaint(strokeColor *StrokeColor, x, y, pageH float64) any {
|
||||
return r.parseFillPaint((*FillColor)(strokeColor), x, y, pageH)
|
||||
}
|
||||
|
||||
// canvasGradient 将公共颜色节点转换为Canvas渐变
|
||||
// 入参: stops 渐变色标
|
||||
// 返回: canvas.Grad 渐变色标
|
||||
func canvasGradient(stops []ColorStop) canvas.Grad {
|
||||
var gradient canvas.Grad
|
||||
for _, stop := range stops {
|
||||
gradient.Add(stop.Offset, stop.Color)
|
||||
}
|
||||
return gradient
|
||||
}
|
||||
|
||||
// canvasShading 转换坐标与椭圆渐变变换，不重新解析OFD样式
|
||||
// 入参: paint 公共渐变画刷, x X坐标, y Y坐标, pageH 页面高度
|
||||
// 返回: *shdPaint Canvas渐变画刷
|
||||
func canvasShading(paint Paint, x, y, pageH float64) *shdPaint {
|
||||
source := paint.Gradient
|
||||
gradient := canvasGradient(source.Stops)
|
||||
start := canvas.Point{X: x + source.Start.X, Y: pageH - y - source.Start.Y}
|
||||
end := canvas.Point{X: x + source.End.X, Y: pageH - y - source.End.Y}
|
||||
if paint.Kind == PaintLinear {
|
||||
result := newShdPaint(gradient.ToLinear(start, end), source.Extend, source.MapType, source.MapUnit)
|
||||
result.sample = source.Sample
|
||||
return result
|
||||
}
|
||||
result := newShdPaint(gradient.ToRadial(start, source.StartRadius, end, source.EndRadius), source.Extend, source.MapType, source.MapUnit)
|
||||
result.sample = source.Sample
|
||||
if e := source.Eccentricity; 0 < e && e < 1 {
|
||||
result.view = canvas.Identity.Translate(start.X, start.Y).Rotate(-source.Angle).Scale(1, math.Sqrt(1-e*e)).Translate(-start.X, -start.Y)
|
||||
result.gradient = gradient.ToRadial(start, source.StartRadius, result.view.Inv().Dot(end), source.EndRadius)
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
// axialShdClip 获取轴向渐变的延伸裁剪区域
|
||||
// 入参: gradient 轴向渐变, extend 延伸方向, bounds 可见区域
|
||||
// 返回: *canvas.Path 裁剪区域
|
||||
func axialShdClip(gradient *canvas.LinearGradient, extend int, bounds canvas.Rect) *canvas.Path {
|
||||
if extend == 3 {
|
||||
return nil
|
||||
}
|
||||
d := gradient.End.Sub(gradient.Start)
|
||||
axis := canvas.Matrix{{d.X, -d.Y, gradient.Start.X}, {d.Y, d.X, gradient.Start.Y}}
|
||||
area := bounds.Transform(axis.Inv())
|
||||
if extend&1 == 0 {
|
||||
area.X0 = math.Max(area.X0, 0)
|
||||
}
|
||||
if extend&2 == 0 {
|
||||
area.X1 = math.Min(area.X1, 1)
|
||||
}
|
||||
if area.X1 <= area.X0 {
|
||||
return &canvas.Path{}
|
||||
}
|
||||
return area.ToPath().Transform(axis)
|
||||
}
|
||||
Reference in new issue
Block a user