Create a PNG, the height cannot > 200000

[mclxly]

Are you using the latest version? Is the version currently in use as reported by npm ls sharp the same as the latest version as reported by npm view sharp dist-tags.latest?
0.26.3

What are the steps to reproduce?

const LIMIT_INPUT_PIXELS = 177610406400

sharp({
            limitInputPixels: LIMIT_INPUT_PIXELS,
            create: {
              width: 2250,
              height: 201000, // cannot > 200000
              channels: 3,
              background: { r: 255, g: 255, b: 255 }
            }
          })
            .toFile(`./tmp.png`, function(err) {
    console.log(err)
  })

No error report but image is corrupted/unused.

What is the expected behaviour?
Creat image success

Are you able to provide a minimal, standalone code sample, without other dependencies, that demonstrates this problem?

Are you able to provide a sample image that helps explain the problem?

What is the output of running npx envinfo --binaries --system?

[lovell]

Hi, this example works for me locally on Linux, albeit rather slowly. When dealing with such large PNG files you might want to lower the compressionLevel setting.

https://sharp.pixelplumbing.com/api-output#png

My best guess would be that you're running out of memory. The example image is 2250 x 201000 x 3 bytes, around 1.4GB, when held uncompressed in RAM.

[mclxly]

@lovell My system is MacOS Big Sur 11.1 with 16GB RAM. I guess other limitation in unknown place.
I'm building a tool for webpage screenshot, some pages are really height.

[lovell]

@mclxly Were you able to make any progress with this? The prebuilt binaries provided in the next release of sharp should offer faster PNG output - see #2604

[mclxly]

@lovell Thank you for your great job. Currently I make all images lower than a fixed number. I will upgrade it later.

[lovell]

v0.28.1 is now available with improved PNG compression performance. Are you able to test to see if it has helped?

[mclxly]

@lovell no lucky, same error.

await sharp({
                  limitInputPixels: LIMIT_INPUT_PIXELS,
                  create: {
                    width: 1000,
                    height: 200000,
                    channels: 3,
                    background: { r: 255, g: 1, b: 255 }
                  }
                })
                  .toFile(`./job_tmp.png`)
// no problem here

                    height: 200100,
// can't open it

[lovell]

When you say "can't open it", what tool(s) are you using? Here's the output from the above code when I run it locally, which displays correctly in Chrome and Firefox:

https://user-images.githubusercontent.com/210965/113830428-83edb800-977e-11eb-95fb-4a0614365c56.png

[mclxly]

Sorry, you are right, it can be opened by Chrome.

It can't open with default preview tool on macOS Big Sur.