Bug 20796 - OpenTk GL.BufferSubData Function Overload issue
Summary: OpenTk GL.BufferSubData Function Overload issue
Alias: None
Product: Android
Classification: Xamarin
Component: Mono runtime / AOT Compiler ()
Version: 4.12.4
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Radek Doulik
Depends on:
Reported: 2014-06-22 06:07 UTC by Rowan
Modified: 2017-06-27 18:11 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Rowan 2014-06-22 06:07:24 UTC
I am using Opengl es 2.0 

the following function overload causes visual issues when rendering (the correct data is not uploaded, it is like it is pointing to a wrong memory location)

 GL.BufferSubData(All.ElementArrayBuffer, (IntPtr)ost, (IntPtr)(numI * 2), ref IaBff[ost]);

I have tried another overload that works well so it is just the above overload that has issues 

                        fixed (short* pArray = IaBff)
                            GL.BufferSubData(All.ElementArrayBuffer, (IntPtr)ost, (IntPtr)(numI * 2), new IntPtr(pArray) + ost);

The desktop OpenTk works fine for both overloads, just the mobile opentk for android has problems for the first overload
Comment 1 Rowan 2014-06-22 06:43:35 UTC
sorry here is the actually overload that has a problem(not my implementation)

 public static void BufferSubData<T3>(All target, IntPtr offset, IntPtr size, [In, Out] ref T3 data) 

and here is the one that works fine

public static void BufferSubData(All target, IntPtr offset, IntPtr size, IntPtr data);
Comment 2 Radek Doulik 2014-07-01 12:35:11 UTC
could you please attach a test case? does it happen with Xamarin Android 4.14.x as well? (4.14.x is available in the alpha channel)
Comment 3 Chris Hardy [MSFT] 2017-06-27 18:11:48 UTC
Because we have not received a reply to our request for more information we are closing this issue. If you are still encountering this issue, please reopen the ticket with the requested information. Thanks!