Hi there, I am trying to load an osg::Image using the setImage method - inparticular I am copying a Managed bitmap (System.Drawing.Bitmap) to the osg::Image to use it as a texture map.
As you can see I'm having a few problems. Here's the osg::Image texture mapped onto a quad when I load it in from file using osgDB::readImageFile [Image: http://i137.photobucket.com/albums/q217/andyb1979/tquadreadimage.png ] Here's the same textured quad, but the osg::Image was created using setImage and a copy from a managed bitmap [Image: http://i137.photobucket.com/albums/q217/andyb1979/th_tquadsetimage.png ] As you can see the image seems to have been inverted and flipped! Here is my code to convert a managed bitmap to osg::Image. The input bitmap has been loaded from file, is in the format 24bpp RGB. I know I'm getting the size/bits per pixel right as the output osg::Image is the right shape and size, with no tearing. However I don't know why the image is inverted! Code: osg::ref_ptr<osg::Image> SceneUtil::ManagedBitmapToOSGImage(System::Drawing::Bitmap ^ bitmap) { // // Check params // if (bitmap == nullptr) { throw gcnew Exception("Unable to convert System::Drawing::Bitmap to osg::Image as the input image is null"); } if (bitmap->PixelFormat != System::Drawing::Imaging::PixelFormat::Format24bppRgb) { throw gcnew Exception("Unable to convert System::Drawing::Bitmap to osg::Image as the input image must be in the format Format24bppRgb"); } // Create a new OSG Image osg::ref_ptr<osg::Image> image = new osg::Image(); System::Drawing::Imaging::BitmapData ^ bitmapData = bitmap->LockBits( System::Drawing::Rectangle(0, 0, bitmap->Width, bitmap->Height), System::Drawing::Imaging::ImageLockMode::ReadOnly, System::Drawing::Imaging::PixelFormat::Format24bppRgb); // Create data to hold the destination image BYTE * ptrSrcImage = (BYTE*)bitmapData->Scan0.ToPointer(); BYTE * ptrDestImage = new unsigned char [bitmap->Width * bitmap->Height * 3]; BYTE * ptrSourceRow = nullptr; BYTE * ptrDestRow = nullptr; int iWidth = bitmapData->Width; int iHeight = bitmapData->Height; int iStride = bitmapData->Stride; // Copy the System::Drawing::Bitmap instance over line by line - this gets around the // lack of stride support in the osg::Image. for(int i = 0; i < iHeight; i++) { // Get the source row pointer ptrSourceRow = ptrSrcImage + (i * iStride); // Get the destination row pointer ptrDestRow = ptrDestImage + (i * (iWidth * 3)); // Copy the source row to the destination row memcpy(ptrDestRow, ptrSourceRow, iWidth * 3); } // Set the data on the osg::Image image->setImage( bitmap->Width, bitmap->Height, 1, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE, ptrDestImage, osg::Image::USE_NEW_DELETE); bitmap->UnlockBits(bitmapData); return image; } Any ideas? Thank you! Andrew ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16492#16492 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
