Enhancement: add pageHeight to response when generating multi-page output

[ry0513]

Possible bug

Is this a possible bug in a feature of sharp, unrelated to installation?

• Running npm install sharp completes without error.
• Running node -e "require('sharp')" completes without error.

If you cannot confirm both of these, please open an installation issue instead.

Are you using the latest version of sharp?

• I am using the latest version of sharp as reported by npm view sharp dist-tags.latest.

If you cannot confirm this, please upgrade to the latest version and try again before opening an issue.

If you are using another package which depends on a version of sharp that is not the latest, please open an issue against that package instead.

What is the output of running npx envinfo --binaries --system --npmPackages=sharp --npmGlobalPackages=sharp?

  System:
    OS: Windows 10 10.0.22000
    CPU: (8) x64 Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
    Memory: 7.28 GB / 15.87 GB
  Binaries:
    Node: 16.14.2 - C:\Program Files\nodejs\node.EXE
    npm: 8.5.0 - C:\Program Files\nodejs\npm.CMD
  npmPackages:
    sharp: ^0.31.1 => 0.31.1

What are the steps to reproduce?

see code example

What is the expected behaviour?

Please see the code example, can I get the height consistent

Please provide a minimal, standalone code sample, without other dependencies, that demonstrates this problem

const sharp = `require("sharp");`

sharp("./1.gif").toFile("./2.gif").then((info) => console.log(info));
// output:
// {
//     format: 'gif',
//     width: 550,
//     height: 400,
//     channels: 3,
//     premultiplied: false,
//     size: 14314
// }

sharp("./1.gif", { animated: true }).toFile("./3.gif").then((info) => console.log(info));
// output:
// {
//     format: 'gif',
//     width: 550,
//     height: 7200,
//     channels: 3,
//     premultiplied: false,
//     size: 562959
// }

Please provide sample image(s) that help explain this problem

[lovell]

We should add pageHeight to the info response object when generating multi-page/animated output, to match the naming/behaviour of metadata(). I suspect also adding pages for the page count would be useful too.

https://sharp.pixelplumbing.com/api-input#metadata

[ry0513]

Thank you, metadata() temporarily solved my problem, still looking forward to info.pageHeight, I wish you a happy day

[lovell]

v0.33.5 now available with pageHeight and pages properties.