mirror of
https://github.com/Dadido3/go-typst.git
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41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
// Copyright (c) 2024-2025 David Vogel
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//
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// This software is released under the MIT License.
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// https://opensource.org/licenses/MIT
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package typst
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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/png"
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"strconv"
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)
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// Image can be used to encode any image.Image into a Typst image.
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//
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// For this, just wrap any image.Image with this type before passing it to MarshalValue or a ValueEncoder.
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type Image struct{ image.Image }
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func (i Image) MarshalTypstValue() ([]byte, error) {
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var buffer bytes.Buffer
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if err := png.Encode(&buffer, i); err != nil {
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return nil, fmt.Errorf("failed to encode image as PNG: %w", err)
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}
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// TODO: Make image encoding more efficient: Use reader/writer, baseXX encoding
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// TODO: Consider using raw pixel encoding instead of PNG
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var buf bytes.Buffer
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buf.WriteString("image.decode(bytes((") // TODO: Pass bytes directly to image once Typst 0.12.0 is not supported anymore
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for _, b := range buffer.Bytes() {
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buf.WriteString(strconv.FormatUint(uint64(b), 10) + ",")
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}
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buf.WriteString(")))")
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return buf.Bytes(), nil
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}
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