Bug 58568 - Wrong signature for OpenTK.Graphics.ES30.GL.TransformFeedbackVaryings
Summary: Wrong signature for OpenTK.Graphics.ES30.GL.TransformFeedbackVaryings
Status: CONFIRMED
Alias: None
Product: Android
Classification: Xamarin
Component: Bindings ()
Version: unspecified
Hardware: All All
: --- normal
Target Milestone: 15.7
Assignee: Radek Doulik
URL:
Depends on:
Blocks:
 
Reported: 2017-08-03 11:36 UTC by hm
Modified: 2018-01-09 18:20 UTC (History)
3 users (show)

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

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Status:
CONFIRMED

Description hm 2017-08-03 11:36:10 UTC
Third argument is a string in xamarin opentk, where it should be a string[].
Calling the method unsurprisingly causes a crash (given that the surrounding state is otherwise correct, otherwise the opengl method will bail out before reading from the array).

OpenGL ES reference:
https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glTransformFeedbackVaryings.xhtml

Xamarin reference: (several version of the method)
https://developer.xamarin.com/api/member/OpenTK.Graphics.ES30.GL.TransformFeedbackVaryings/p/System.Int32/System.Int32/System.String/OpenTK.Graphics.ES30.TransformFeedbackMode/

A workaround is to write your own binding instead, ie:
[System.Runtime.InteropServices.DllImport("libGLESv2", EntryPoint = "glTransformFeedbackVaryings")]
private static extern int glTransformFeedbackVaryings(int program, int count, string[] varyings, int mode);


(android and ios versions of opentk both got the same wrong signature, but only tried it in android)