1488449 - [screenshot] Big pages can't be screenshotted, fails without a message

Status: RESOLVED DUPLICATE of bug 766661

(DevTools Graveyard :: Graphic Commandline and Toolbar, defect)

Description

[Julien Wajsberg [:julienw]]

STR:
1. enable the screenshot toolbox button in Firefox Devtools
2. go to https://phabricator.services.mozilla.com/D3618?large=true
3. Try to screenshot the page using the button

=> nothing happens. Except that when you're scrolled down, the page is scrolled up to the top.

This doesn't happen on smaller pages.

Comment 1

[Julian Descottes [:jdescottes]]

stack strace:

createScreenshotDataURL@resource://devtools/shared/base-loader.js -> resource://devtools/shared/screenshot/capture.js:93:3
captureScreenshot@resource://devtools/shared/base-loader.js -> resource://devtools/shared/screenshot/capture.js:41:10
capture@resource://devtools/shared/base-loader.js -> resource://devtools/server/actors/screenshot.js:18:12
handler@resource://devtools/shared/base-loader.js -> resource://devtools/shared/protocol.js:1178:21
onPacket@resource://devtools/shared/base-loader.js -> resource://devtools/server/main.js:1711:15
receiveMessage@resource://devtools/shared/base-loader.js -> resource://devtools/shared/transport/child-transport.js:66:5
MessageListener.receiveMessage*_addListener@resource://devtools/shared/base-loader.js -> resource://devtools/shared/transport/child-transport.js:40:5
ready@resource://devtools/shared/base-loader.js -> resource://devtools/shared/transport/child-transport.js:57:5
_onConnection@resource://devtools/shared/base-loader.js -> resource://devtools/server/main.js:1146:5
connectToParent@resource://devtools/shared/base-loader.js -> resource://devtools/server/main.js:577:12
onConnect</<@resource://devtools/server/startup/frame.js:50:22
onConnect<@resource://devtools/server/startup/frame.js:49:7
exports.makeInfallible/<@resource://devtools/shared/base-loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14
MessageListener.receiveMessage*@resource://devtools/server/startup/frame.js:72:5
@resource://devtools/server/startup/frame.js:19:4

most likely too large 2d canvas

Comment 2

[Soledad Penades [:sole] [:spenades]]

Sorry Julien, it's a dupe :-/

Comment 3

[Julien Wajsberg [:julienw]]

Isn't it possible to show something to the user when we get the error ? Some friendly error message in the webconsole ? Or is it too async so that it's difficult to do ?

Comment 4

[Soledad Penades [:sole] [:spenades]]

I agree that can be the right thing to do for now, I believe it shouldn't be that async.