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Increase hash size for Screens.Hash() #70

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merged 1 commit into from
Sep 7, 2021
Merged

Increase hash size for Screens.Hash() #70

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13 changes: 6 additions & 7 deletions encode/encode.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,15 +2,15 @@ package encode

import (
"bytes"
"encoding/binary"
"crypto/sha256"
"encoding/json"
"fmt"
"image"
"image/color"
"image/gif"
"time"

"github.com/harukasan/go-libwebp/webp"
"github.com/mitchellh/hashstructure/v2"
"github.com/pkg/errors"
"tidbyt.dev/pixlet/render"
)
Expand Down Expand Up @@ -69,14 +69,13 @@ func (s *Screens) Hash() ([]byte, error) {
hashable.Images = s.images
}

sum, err := hashstructure.Hash(hashable, hashstructure.FormatV2, nil)
j, err := json.Marshal(hashable)
if err != nil {
return nil, err
return nil, errors.Wrap(err, "marshaling render tree to JSON")
}

buf := make([]byte, binary.MaxVarintLen64)
n := binary.PutUvarint(buf, sum)
return buf[:n], nil
h := sha256.Sum256(j)
return h[:], nil
}

// Renders a screen to WebP. Optionally pass filters for
Expand Down