728571 - Not possible to draw extra-tall canvas (>8192) into a smaller one

Status: NEW

(Core :: Graphics: Canvas2D, defect)

Description

[ondra zara]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2
Build ID: 20120215223356

Steps to reproduce:

Open http://jsfiddle.net/whCp5/5/


Actual results:

The smaller canvas is not red.


Expected results:

The smaller canvas should be red.

If I change the height of larger canvas to be <= 8192, drawImage works okay.

Comment 1

[Jesper Hansen]

Attachment: c1.height = 8193

Comment 2

[Jesper Hansen]

Attachment: c1.height = 8192

Comment 3

[Alice0775 White]

FYI
It works if disable HWA

Comment 4

[Jesper Hansen]

Confirmed disabling HWA makes it draw

Comment 6

[Milan Sreckovic [:milan] (needinfo for best results)]

I see this on OSX (retina) when going above 4096 in the trunk.  In other words, 4096 works, 4097 does not.  I'm pretty sure we should fall back from HW automatically when we go beyond what the hardware can handle.

Comment 7

[Milan Sreckovic [:milan] (needinfo for best results)]

(In reply to Milan Sreckovic [:milan] from comment #6)
> I see this on OSX (retina) when going above 4096 in the trunk.  In other
                                                          ^^^^^
I take that back.  This is fine on OSX in the trunk, but was broken in 19. We did, however, limit the size of the texture on OSX/Intel, so that's probably saving us.

Comment 8

[Milan Sreckovic [:milan] (needinfo for best results)]

Just to finish the OSX comments:
* 19, with Intel - problem > 4096
* 19, with discrete graphics - OK
* trunk, with Intel, ok
* trunk, with discrete graphics - OK