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94 lines
2.4 KiB
Go
94 lines
2.4 KiB
Go
package processing
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import (
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"context"
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"github.com/imgproxy/imgproxy/v3/imagedata"
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"github.com/imgproxy/imgproxy/v3/imagetype"
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"github.com/imgproxy/imgproxy/v3/options"
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"github.com/imgproxy/imgproxy/v3/router"
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"github.com/imgproxy/imgproxy/v3/vips"
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)
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type pipelineContext struct {
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ctx context.Context
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imgtype imagetype.Type
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trimmed bool
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srcWidth int
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srcHeight int
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angle int
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flip bool
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cropWidth int
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cropHeight int
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cropGravity options.GravityOptions
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wscale float64
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hscale float64
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dprScale float64
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// The width we aim to get.
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// Based on the requested width scaled according to processing options.
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// Can be 0 if width is not specified in the processing options.
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targetWidth int
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// The height we aim to get.
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// Based on the requested height scaled according to processing options.
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// Can be 0 if height is not specified in the processing options.
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targetHeight int
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// The width of the image after cropping, scaling and rotating
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scaledWidth int
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// The height of the image after cropping, scaling and rotating
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scaledHeight int
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// The width of the result crop according to the resizing type
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resultCropWidth int
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// The height of the result crop according to the resizing type
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resultCropHeight int
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// The width of the image extended to the requested aspect ratio.
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// Can be 0 if any of the dimensions is not specified in the processing options
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// or if the image already has the requested aspect ratio.
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extendAspectRatioWidth int
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// The width of the image extended to the requested aspect ratio.
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// Can be 0 if any of the dimensions is not specified in the processing options
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// or if the image already has the requested aspect ratio.
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extendAspectRatioHeight int
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}
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type pipelineStep func(pctx *pipelineContext, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error
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type pipeline []pipelineStep
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func (p pipeline) Run(ctx context.Context, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error {
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pctx := pipelineContext{
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ctx: ctx,
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wscale: 1.0,
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hscale: 1.0,
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cropGravity: po.Crop.Gravity,
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}
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if pctx.cropGravity.Type == options.GravityUnknown {
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pctx.cropGravity = po.Gravity
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}
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for _, step := range p {
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if err := step(&pctx, img, po, imgdata); err != nil {
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return err
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}
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if err := router.CheckTimeout(ctx); err != nil {
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return err
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}
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}
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img.SetDouble("imgproxy-dpr-scale", pctx.dprScale)
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return nil
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}
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