Inexplainable OpenGL error 0x0501 occuring.

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Inexplainable OpenGL error 0x0501 occuring.

(9 posts) (4 voices)

Started 11 months ago by pimms
Latest reply from luridmorn

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pimms
Member

I have a major issue when trying to run my tiled game on my iPad device in debug-mode. Note that both the simulator and the profiler (release) works fine, but I don't get the console output on the real device.

I've googled the issue, and it appears that the error values in OpenGL varying from 0x0500 -> 0x0503 occur when:
A: A too large image is attempted loaded (My largest is 192 * 128)
B: A bad value is passed to a method within OpenGL.

Also, these error values give the same error message:
OpenGL error 0x0501 in -[EAGLView swapBuffers]

YET, I cannot figure out what I'm doing wrong. One Google-hit led me to this page:
http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:autorotation?s=glview

However, I've tried both the default settings, and the minor tweaks shown in this guide. Still the same error.

I am not using any direct OpenGL calls directly - only what's called from CCTMXTiledMad and CCSprite. Nor have I changed any AppDelegate methods.

In a futile attempt to narrow the cause down more, I CCLOG'd pretty much all my code to see if anything didn't load properly. This also proved out not to be the cause of my issues.

As my experience with OpenGL is highly limited, I've copied the console log after launching my app on my iPad in debug-mode. I've edited some parts down, and removed my personal CCLOG's entirely, as they are not of importance.

cocos2d: cocos2d v1.0.0-rc
cocos2d: Using Director Type:CCDirectorDisplayLink
cocos2d: OS version: 5.0 (0x05000000)
cocos2d: GL_VENDOR: Imagination Technologies
cocos2d: GL_RENDERER: PowerVR SGX 535
cocos2d: GL_VERSION: OpenGL ES-CM 1.1 IMGSGX535-63.4.2
cocos2d: GL_MAX_TEXTURE_SIZE: 2048
2cocos2d: GL_MAX_MODELVIEW_STACK_DEPTH: 16
cocos2d: GL_MAX_SAMPLES: 4
cocos2d: GL supports PVRTC: YES
cocos2d: GL supports BGRA8888 textures: YES
cocos2d: GL supports NPOT textures: YES
cocos2d: GL supports discard_framebuffer: YES
cocos2d: compiled with NPOT support: NO
cocos2d: compiled with VBO support in TextureAtlas : YES
cocos2d: compiled with Profiling Support: NO
OpenGL error 0x0501 in -[ES1Renderer resizeFromLayer:]
OpenGL error 0x0501 in -[EAGLView swapBuffers]

//Map loaded successfully

cocos2d: CCSpriteBatchNode: resizing TextureAtlas capacity (from 260->860, 5 calls)

//Player loaded successfully

OpenGL error 0x0501 in -[EAGLView swapBuffers]

If it is of any help, my app does from time to time recieve a memory-warning, although it at it's peak uses 11MB of memory.

EDIT:
I'm running iOS 5 and Xcode 4.2 beta

Posted 11 months ago #
manucorporat
Member
This is a common error caused because the opengl error wasn't cleared.
You should review:
- Your blend functs
- Your own opengl stuff

or simply add:
```
glGetError();
```
in EAGLView:swapBuffers
Posted 11 months ago #
pimms
Member

I'm not 100% certain of what you mean with blend functions, but I am however, quite sure I don't have any. Nor do I have any own OpenGL stuff.

Added glGetError at different places, and at best it only removed the error messages I got, but still my screen remained black.

EDIT:
I may have forgotten to mention that the screen is black, except for the Cocos2D-Default.png.

Also, I do not have any blend functions of my own either. Are there any Cocos2D calls that might trigger something like this?

Posted 11 months ago #
pimms
Member
Okay, so I've spent a few hours debugging this now, and I'm starting to believe that the issue is a crash between either Cocos2D or OpenGL and iOS5.

Issue:
When ran on an iPad device, the screen is pitch black.
The app is not crashing.
The app recieves a memory warning, although profiling shows it now allocates 1.4MB (2.5 peak).
Error messages on iPad (debug & release):

OpenGL error 0x0501 in -[ES1Renderer resizeFromLayer:]
OpenGL error 0x0501 in -[EAGLView swapBuffers]

When ran on simulator
SDK 4.3.2
No issues

SDK 5.0
The app runs, but prints error messages:

*** ImageIO - could not find ColorSync function 'ColorSyncProfileCreateWithName'
*** ImageIO - could not find ColorSync function 'ColorSyncProfileCopyData'

After searching for 'ColorSync' in the source code, nothing appears.

Location of error:
```
EAGLView.m
- (void) layoutSubviews
{
    //This call triggers all the error-messages.
    [renderer_ resizeFromLayer:(CAEAGLLayer*)self.layer];

	size_ = [renderer_ backingSize];

	CCDirector *director = [CCDirector sharedDirector];
	[director reshapeProjection:size_];

	[director performSelectorOnMainThread:@selector(drawScene) withObject:nil waitUntilDone:YES];
}
```
This is called before any of my own code is ran, as it's all called from within applicationDidFinishLaunching, before the Director changes scene to my GameScene. Surely, someone else must have the same issue?
Posted 11 months ago #
luridmorn
Member

did hit same error after upgrading to lion, xcode 4.2 with ios 5 sdk this weekend. using cocos2d 1.0.1.
no issue before, but after recompiling project post upgrades.

ipad display stays black on device, but will work in simulator.

during alloc-inits of objects and scene.
OpenGL error 0x0501 in -[CCTexturePVR createGLTexture]
followed by a
OpenGL error 0x0501 in -[EAGLView swapBuffers]
once all alloc-inits are done.

universal build yields same result as any other setting. even an iphone only build stays black on ipad.
defined orientations of device did not seem to matter.
it seems not to be related to my project since a clean project from cocos2d templates does have the same issue.

it might have to do with the warning:
Applications are expected to have a root view controller at the end of application launch.
http://www.cocos2d-iphone.org/forum/topic/21953

and further be related to using a programmatically generated view instead of one saved as a xib.

did anyone solve this yet?

similar posts:
http://www.cocos2d-iphone.org/forum/topic/21868

Posted 7 months ago #
araker
Moderator

Have you seen this post on stackoverflow?

Posted 7 months ago #
luridmorn
Member

thx @araker for pointing out the post.
i was able to fix the rvc warning – added the launchwithoptions-method, rootviewcontroller-property and updated main.m to ios5 version.

edit:
i was able to fix the main issue, but I do not understand why... reboot the device.

all I did was reboot the ipad. I did that once I noticed the xcode breakpoints where not working anymore.
http://stackoverflow.com/questions/5260349/xcode-4-final-breakpoints-on-device-ipad-not-working

Posted 7 months ago #
araker
Moderator

What happens when you use png's instead of pvr textures?

Posted 7 months ago #
luridmorn
Member

it seems to be fixed. thx.

funny fact: the rvc warning reappears if one issues an alertview before the app didfinishlaunching fn is called. works, but displays the warning.

Posted 7 months ago #

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