display.capture broken?

Audio and Graphics
#1

I can only get the docs example of display.capture to work. Any changes and it breaks - does not return a captured display object. I am trying to populate a group with simple objects and duplicate it.

In the code below only the last function works…

I’m using the iPhone X skin with:

Copyright © 2009-2018  C o r o n a   L a b s   I n c .

Jan 27 08:48:30.774: Version: 3.0.0

Jan 27 08:48:30.774: Build: 2018.3213

Jan 27 08:48:30.803: Platform: iPhone / x86_64 / 10.12.6 / Intel® Iris™ Graphics 550 / 2.1 INTEL-10.25.17 / 2018.3213 / en-GB | GB | en_GB | en

 

3.3Ghz i7 with 16 Gb…

local function testGenerateShadow() local group = display.newGroup() group.x, group.y = 400, 400 local a = display.newCircle( group, 0, 0, 100 ) a.fill = {0,1,0} local b = display.newRect( group, 0, 0, 300, 25 ) b.fill = {1,0,0} timer.performWithDelay( 1000, function() local cap = display.capture( group ) group:removeSelf() cap.x, cap.y = 200, 200 print("done") end ) end --testGenerateShadow() local function testCapture() local a = display.newRect( 0, 0, 100, 150 ) a.fill = {1,0,0} local b = display.newRect( 0, 0, 200, 100 ) b.fill = {0,0,1} local g = display.newGroup() g:insert( a ) g:insert( b ) g.x, g.y = 200, 200 local function captureWithDelay() local capture = display.capture( g ) g:removeSelf() capture.x, capture.y = 200, 300 end timer.performWithDelay( 1000, captureWithDelay ) end testCapture() local function captureTest() -- https://docs.coronalabs.com/api/library/display/capture.html#example local myObject1 = display.newRect( 50, 50, 100, 150 ) -- Create a rectangle object local myObject2 = display.newCircle( 100, 300, 50 ) -- Create a circle object myObject1.fill = {1,0,0} myObject2.fill = {1,0,1} local group = display.newGroup() group:insert( myObject1 ) group:insert( myObject2 ) local function captureWithDelay() -- Capture the entire group as a new display object local combined = display.capture( group ) -- Position the new display object combined.x, combined.y = 300, 300 -- Remove it group:removeSelf() combined = nil end timer.performWithDelay( 1000, captureWithDelay ) end --captureTest()
#2

I’m convinced that this used to work as I have lots of legacy code which uses a capture and blur effect to generate a blurred version of a display group. Suddenly, this doesn’t work.

Where the above code starts to fails is when .fill is set on one of the two objects added to the group being captured.

#3

works fine for me using 3200

#4

I’m on the latest daily build. Have you tried each function in the code I posted?

#5

@sgs would love input from you on this.

Am I really the only one with this issue?

#6

I get this

#7

I feel like I’m taking crazy pills.

#8

@horacebury can you put together a simple test case and zip it up and share it here?  I’ll try to give it a try, but I can’t spend the time to try and guess at your config.lua and build.settings.

Thanks

Rob

#9

@rob Yes, definitely. Thank you.

#10

Hi Rob,

This link is a video showing what happens on the latest daily build (3215):

https://www.dropbox.com/s/0u6f2jwazgxv9qn/displaycapture.mov?dl=0

This is the code - the second function ‘testCapture()’ demonstrates the issue:

I am running it without a build.settings or config.lua file (though I should note that the result I see is the same as in my much larger application… I can provide that if you have somewhere I can drop you a private link…)

local function testGenerateShadow() local group = display.newGroup() group.x, group.y = 400, 400 local a = display.newCircle( group, 0, 0, 100 ) a.fill = {0,1,0} local b = display.newRect( group, 0, 0, 300, 25 ) b.fill = {1,0,0} timer.performWithDelay( 1000, function() local cap = display.capture( group ) group:removeSelf() cap.x, cap.y = 200, 200 print("done") end ) end --testGenerateShadow() local function testCapture() local g = display.newGroup() g.x, g.y = 150, 150 local a = display.newRect( g, 0, 0, 100, 150 ) a.fill = {1,0,0} local b = display.newRect( g, 0, 0, 200, 100 ) b.fill = {0,0,1} local function captureWithDelay() local capture = display.capture( g ) -- g:removeSelf() capture.x, capture.y = 200, 300 end timer.performWithDelay( 2000, captureWithDelay ) end testCapture() local function captureTest() -- https://docs.coronalabs.com/api/library/display/capture.html#example local group = display.newGroup() local myObject1 = display.newRect( group, 50, 50, 100, 150 ) -- Create a rectangle object local myObject2 = display.newCircle( group, 100, 300, 50 ) -- Create a circle object myObject1.fill = {1,0,0} myObject2.fill = {1,0,1} -- group:insert( myObject1 ) -- group:insert( myObject2 ) local function captureWithDelay() -- Capture the entire group as a new display object local combined = display.capture( group ) -- Position the new display object combined.x, combined.y = 300, 300 -- Remove it timer.performWithDelay( 1000, function() group:removeSelf() combined = nil end ) end timer.performWithDelay( 1000, captureWithDelay ) end --captureTest()
#11

What I’m asking for is a .zip file that I can download, unpack and run in the simulator and if necessary do a device or desktop build. 

This would be really helpful to me.

Also without a config.lua, then there will be possible skin or device dependencies which will make this even harder to track down.

Rob

#12

Thanks Rob, here’s the download link:

https://www.dropbox.com/s/j6dh1hfz8z3q20m/DisplayCapture.zip?dl=0

I’ve included the video file.

#13

You need to call display.capture like:

local combined = display.capture( group, { captureOffscreenArea=true }  )

If you want to have it capture parts of objects that are offscreen. See if that helps with your issue.

Rob

#14

Its not that its not capturing the offscreen parts, rather that it doesn’t capture the object at all.

I’ve added the option table here:

https://www.dropbox.com/s/z1b5j1tg20jmzsl/Archive.zip?dl=0

Updated the video as well.

#15

Another sample based more directly on my work-in-progress:

https://www.dropbox.com/s/ru18wxldsfmubhw/copy.zip?dl=0

This time I was rather surprised to see a pretty bad anomaly appear in the capture:

https://www.dropbox.com/s/0u6f2jwazgxv9qn/displaycapture.mov?dl=0

#16

I tried both “Archive.zip” and “copy.zip” examples.  Both captured and displayed fine.  In Archive.zip, I ran each test with success.

MacBook Pro

Build: 2018.3215

Platform: iPhone / x86_64 / 10.12.6 / NVIDIA GeForce GT 750M OpenGL Engine / 2.1 NVIDIA-10.17.5 355.10.05.45f01 / 2018.3215 / en-US | US | en_US | en

…and I tried “copy.zip” on two other laptops…

Windows 10 Pro (nvidia graphics and intel integrated) w/ build 2018.3217 with no issues.

Mac OS X 10.13 (AMD R9 graphics and intel integrated) w/ build 2018.3217 with no issues.

#17

Really don’t understand this. Just ran a different test which seems to work just fine…

w = 50 r = w/3 s = w/3 d = display.newGroup() d.x, d.y = 50, 100 display.newRect( d, 0, 0, w, w ).fill = {0,0,0} c = display.newCircle( d, 0, 0, r ) cc = display.newCircle( d, 0, 0, r ) e = display.newCircle( d, c.x+w-r, 0, r ) f = display.newCircle( d, e.x+w-r, 0, r ) c.fill = {1,1,1,.9} c.stroke = {1,0,0} c.strokeWidth = s cc.fill = {1,1,1,0} cc.stroke = {0,0,0} cc.strokeWidth = 1 e.fill = {1,1,1,.9} e.stroke = {0,0,1} e.strokeWidth = s f.fill = {1,1,1,.9} f.stroke = {0,0,1} f.strokeWidth = s print(c.width,c.height) print(cc.width,cc.height) print(d.width,d.height) local a = display.capture( d ) a.x, a.y = 50, 50

The error seen in the video of my last post makes me think there’s a problem with the GPU?

#18

You have rebooted right?  None of us can replicate your issue so that does imply something local to you.

#19

Have just rebooted after installing the latest security update. All samples run as described above on build 3218 :S

Concerned that I might have a GPU issue but I have trouble believing that because of the inconsistent behaviour. If the capture would fail surely it would be consistently failing? I don’t what powers its underlying functionality so can’t self diagnose.

#20

@Rob, I’m driven to find out why it is happening. Any suggestions for my further investigation?