mirror of
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97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
package processing
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import (
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"context"
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"github.com/imgproxy/imgproxy/v3/config"
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"github.com/imgproxy/imgproxy/v3/imagedata"
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"github.com/imgproxy/imgproxy/v3/imath"
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"github.com/imgproxy/imgproxy/v3/options"
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"github.com/imgproxy/imgproxy/v3/vips"
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)
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var watermarkPipeline = pipeline{
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prepare,
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scaleOnLoad,
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importColorProfile,
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scale,
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rotateAndFlip,
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padding,
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finalize,
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}
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func prepareWatermark(wm *vips.Image, wmData *imagedata.ImageData, opts *options.WatermarkOptions, imgWidth, imgHeight int) error {
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if err := wm.Load(wmData, 1, 1.0, 1); err != nil {
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return err
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}
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po := options.NewProcessingOptions()
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po.ResizingType = options.ResizeFit
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po.Dpr = 1
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po.Enlarge = true
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po.Format = wmData.Type
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if opts.Scale > 0 {
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po.Width = imath.Max(imath.Scale(imgWidth, opts.Scale), 1)
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po.Height = imath.Max(imath.Scale(imgHeight, opts.Scale), 1)
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}
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if opts.Replicate {
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po.Padding.Enabled = true
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po.Padding.Left = int(opts.Gravity.X / 2)
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po.Padding.Right = int(opts.Gravity.X) - po.Padding.Left
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po.Padding.Top = int(opts.Gravity.Y / 2)
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po.Padding.Bottom = int(opts.Gravity.Y) - po.Padding.Top
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}
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if err := watermarkPipeline.Run(context.Background(), wm, po, wmData); err != nil {
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return err
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}
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if opts.Replicate {
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return wm.Replicate(imgWidth, imgHeight)
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}
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left, top := calcPosition(imgWidth, imgHeight, wm.Width(), wm.Height(), &opts.Gravity, true)
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return wm.Embed(imgWidth, imgHeight, left, top)
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}
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func applyWatermark(img *vips.Image, wmData *imagedata.ImageData, opts *options.WatermarkOptions, framesCount int) error {
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if err := img.RgbColourspace(); err != nil {
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return err
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}
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if err := img.CopyMemory(); err != nil {
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return err
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}
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wm := new(vips.Image)
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defer wm.Clear()
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width := img.Width()
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height := img.Height()
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if err := prepareWatermark(wm, wmData, opts, width, height/framesCount); err != nil {
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return err
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}
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if framesCount > 1 {
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if err := wm.Replicate(width, height); err != nil {
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return err
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}
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}
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opacity := opts.Opacity * config.WatermarkOpacity
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return img.ApplyWatermark(wm, opacity)
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}
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func watermark(pctx *pipelineContext, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error {
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if !po.Watermark.Enabled || imagedata.Watermark == nil {
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return nil
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}
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return applyWatermark(img, imagedata.Watermark, &po.Watermark, 1)
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}
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