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Dominik Schmidt
de467d7dd8
A source type maps onto the type its thumbnail is returned in, and that type is asked for by the name the generator knows it under. The answer carries that type whether it was just generated or came from the cache, which is also what the cache key says.
40 lines
914 B
Go
40 lines
914 B
Go
//go:build !enable_vips
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package workflow
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import (
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"bytes"
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"fmt"
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"image"
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"image/gif"
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"image/jpeg"
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"image/png"
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)
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// encodeForUpload turns the value produced by the preprocessing step into
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// bytes for upload to the generator, and says which type they are in.
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func encodeForUpload(v any, mimeType string) ([]byte, string, error) {
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switch data := v.(type) {
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case image.Image:
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var buf bytes.Buffer
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if mimeType == "image/jpeg" || mimeType == "image/jpg" {
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err := jpeg.Encode(&buf, data, &jpeg.Options{Quality: 85})
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return buf.Bytes(), "image/jpeg", err
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}
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err := png.Encode(&buf, data)
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return buf.Bytes(), "image/png", err
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case *gif.GIF:
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var buf bytes.Buffer
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if err := gif.EncodeAll(&buf, data); err != nil {
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return nil, "", fmt.Errorf("encode gif: %w", err)
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}
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return buf.Bytes(), "image/gif", nil
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default:
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return nil, "", fmt.Errorf("unsupported converted type %T", v)
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}
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}
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