use setResizeNonPowerOfTwoHint(false) on your texture or use TextureRectangle instead of Texture2D
Cheers 02.03.2012, 06:41, "Michael Schanne" <[email protected]>: > Thanks for the responses. > > Using a PixelBufferObject did not appear to make any difference in > performance for me. My video hardware only supports OpenGL 1.5, so that is > probably the reason. > > I suspect the power of two issue is the cause of my performance problem. > When I create a 640x480 image I get a console message that it is being scaled > to 512x512. However, when I try to create a 512x512 image instead, I get an > error message "Detected OpenGL error 'invalid enumerant' at After > Renderer::compile". This is before I even attempt to load any video data > into the image. What does this error mean? > > Here is the code: > > int pixelsX = 640; > int pixelsY = 480; > int bytesPerPixel = 4; > > rawData = new unsigned char[pixelsX * pixelsY * bytesPerPixel]; > memset(rawData, 0xFF, (pixelsX * pixelsY * bytesPerPixel)); > > setImage( > pixelsX, // width > pixelsY, // height > 1, // depth > GL_RGB8, // internal texture format > GL_BGRA, // pixel format > GL_UNSIGNED_INT_8_8_8_8, // data type > rawData, // raw data > osg::Image::NO_DELETE); // memory allocation mode > > Using 640x480 (which gets scaled to 512x512) I get a white quad, as I expect. > However, if I use 512x512 image, I see distorted green lines with a black > background on the quad, along with the error. If I try to load any video > data at this point, the program crashes. > > I also have the option of using a video frame of 8 bits per pixel (for a > greyscale image) but I have not been able to see the image at all in that > case. I tried using the GL_LUMINANCE pixel format and GL_UNSIGNED_BYTE data > type, along with a few other combinations, but nothing has worked so far. > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=45956#45956 > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
