Offscreen rendering - Save html as png

[John]

Is there anyway to render html page to png file ?

If yes, can you please provide a C\C++ example\tutorial

[PhistucK]

You should probably look into the Chrome Headless effort. One of their goals is to have a way to get a screenshot for the entire page, if I remember correctly.

https://groups.google.com/a/chromium.org/d/forum/headless-dev

☆PhistucK

On Tue, Jul 12, 2016 at 10:21 PM, John <tarion...@gmail.com> wrote:

Is there anyway to render html page to png file ?

If yes, can you please provide a C\C++ example\tutorial

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[Alex Clarke]

+eseckler

I believe basic screen shotting works in headless_lib but we are adding more advanced controls. 

[Eric Seckler]

Hi John,

There's a DevTools command, which takes a png screenshot of the rendered page as displayed in a browser window. We use this command to take screenshots in the headless_shell, see HeadlessShell::captureScreenshot(), and we're currently working on adding other controls for size and position of the screenshot area.

Depending on your use case, you can

  1) build and use headless shell ("headless_shell --screenshot https://google.com")

  2) embed headless_lib yourself and call the DevTools command through the C++ bindings (similar to what HeadlessShell does)

  3) or connect to a renderer in a running chrome or headless_shell via the DevTools protocol (use --remote-debugging-port) and issue the command.

Cheers,

Eric