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POuse opengl in thread
 

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  1. POuse opengl in thread
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    <p>I have a library, which is engaged in rendering on opengl and prinimaet streams from the network.</p> <p>I write under a poppy, but plans to use on linux</p> <p>so the window is created for objective c I start drawing in a separate thread in the other receiving and decoding the data.</p> <p>I crash bug (EXT_BAD_ACCESS) on methods of opengl, even if I use them only in a single thread.</p> <p>my code main glut:</p> <pre><code>int main(int argc, const char * argv[]){ glutInit(&amp;argc, argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA); int win = glutGetWindow(); glutInitWindowSize(800, 600); glutCreateWindow("OpenGL lesson 1"); client_init(1280, 720, win, "192.168.0.98", 8000, 2222); return 0; </code></pre> <p>}</p> <p>or objective c</p> <pre><code>- (id)initWithFrame:(NSRect)frameRect pixelFormat:(NSOpenGLPixelFormat*)format{ self = [super initWithFrame:frameRect]; if (self != nil) { NSOpenGLPixelFormatAttribute attributes[] = { NSOpenGLPFANoRecovery, NSOpenGLPFAFullScreen, NSOpenGLPFAScreenMask, CGDisplayIDToOpenGLDisplayMask(kCGDirectMainDisplay), (NSOpenGLPixelFormatAttribute) 0 }; _pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes]; if (!_pixelFormat) { return nil; } //_pixelFormat = [format retain]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_surfaceNeedsUpdate:) name:NSViewGlobalFrameDidChangeNotification object:self]; _openGLContext = [self openGLContext]; client_init(1280, 720, win, "192.168.0.98", 8000, 2222); } return self; </code></pre> <p>}</p> <p>client_init code</p> <pre><code> // pthread_create(&amp;posixThreadID, NULL, (void*(*)(void*))ShowThread, dh_tmp); pthread_create(&amp;posixThreadID, NULL, (void*(*)(void*))ShowThread, NULL); void* ShowThread(struct drawhandle * dh){ //glViewport(0, 0, dh-&gt;swidth, dh-&gt;sheight);//EXT_BAD_ACCESS glViewport(0, 0, 1280, 720);//EXT_BAD_ACCESS glMatrixMode(GL_PROJECTION); glLoadIdentity(); //gluOrtho2D(0, dh-&gt;swidth, 0, dh-&gt;sheight); gluOrtho2D(0, 1280, 0, 720); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); ... return 0; } </code></pre> <p>I think the problem is? that uncreated context opengl.</p> <p>How to create it in macos / linux?</p>
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    1. USuser1881371
    1. USuser1881371
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    1. COSure that `dh` isn't null?
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      1. USFelix K.
    2. COyeah sure, it was the first version
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      1. USuser1881371
    3. COHi, have you created the opengl context? if not tell me what os and I can try and throw some code together to let you see whats needed :) Also what APIs/libraries are you using? ie CGL/GLEW/GLUT etc
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      1. POuse opengl in thread
      1. USGMasucci
 

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