Re: [osg-users] Convert wxImage to osg:Image
Hi, I updated the code as follows. Code: wxImageHandler * tgaLoader = new wxJPEGHandler(); wxImage::AddHandler(tgaLoader); wxImage wximage; wximage.LoadFile(_T(/home/lahiru/Pictures/IMG_6064.JPG), wxBITMAP_TYPE_JPEG); wxMemoryOutputStream img_data(NULL,0); wximage.SaveFile(img_data,wxBITMAP_TYPE_JPEG); wxStreamBuffer* output_buffer = img_data.GetOutputStreamBuffer(); int length = output_buffer-GetDataLeft(); char buffer[length]; output_buffer-Read(buffer,length); std::stringstream ss; ss.write(buffer,length); osgDB::ReaderWriter* plugin = osgDB::Registry::instance()-getReaderWriterForExtension(JPEG); osgDB::ReaderWriter::ReadResult result = plugin-readImage(ss); osg::Image* klnFace = result.getImage(); However, for some reason, output_buffer-GetDataLeft(); returns 0. In the actual use case, I have to convert a wxBitmap into an osg::Image to apply it as a texture. I will try to save the wxImage as a file and load it into an osg::image for the time being. I really appreciate some help on this. Thank you! Best Regards, Lahiru -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=32326#32326 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convert wxImage to osg:Image
Hi all,
After trying for few hours, I was able to convert the wxImage into an
osg:Image, and apply it as a texture.
I am posting the code below as it might help someone else as well.
Code:
wxBitmap bmp(wximage);
wxNativePixelData data(bmp);
wxNativePixelData::Iterator p(data);
osg::Image* klnFace = new osg::Image();
int tex_width = data.GetWidth();
int tex_height = data.GetHeight();
klnFace-allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_FLOAT);
float* img_data = (float*)klnFace-data();
for (unsigned i = 0; (i tex_height); i++) {
for (unsigned j = 0; (j tex_width); j++) {
int ind = i*tex_width + j;
img_data[ind*4] = p.Red()/255.0;
img_data[ind*4+1] = p.Green()/255.0;
img_data[ind*4+2] = p.Blue()/255.0;
img_data[ind*4+3] = 1.0;
p.MoveTo(data, j, tex_height-1-i);
}
}
I used wxNativePixelData to access the raw image data.
Thank you!
Cheers,
Lahiru
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http://forum.openscenegraph.org/viewtopic.php?p=32330#32330
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Re: [osg-users] Convert wxImage to osg:Image
Hi, I modified the code to convert a wxImage to osg Image as follows. However, for some reason the resulting osg Image is not accurate. When I apply the resulted osg Image as a texture, it shows nothing but a gray colored QUAD. Am I doing something wrong in the code below? I really appreciate your help! Code: wxImageHandler * imgLoader = new wxJPEGHandler(); wxImage::AddHandler(imgLoader); wxImage wximage; wximage.LoadFile(_T(pictures/img.JPG), wxBITMAP_TYPE_JPEG); unsigned char* datachar = wximage.GetData(); std::stringstream ss; size_t len = strlen((const char*)datachar); ss.write((const char*)datachar, len); osgDB::ReaderWriter* plugin = osgDB::Registry::instance()-getReaderWriterForExtension(JPEG); /* tried both ss and ss.str() */ osgDB::ReaderWriter::ReadResult result = plugin-readImage(ss); // osgDB::ReaderWriter::ReadResult result = plugin-readImage(ss.str()); /* Texture */ osg::Texture2D* KLN89FaceTexture = new osg::Texture2D; KLN89FaceTexture-setDataVariance(osg::Object::DYNAMIC); osg::Image* klnFace = result.getImage(); Thank you! Best Regards, Lahiru[/code] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=32302#32302 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convert wxImage to osg:Image
Hi Thibault, Thanks for the sample code! However, it is actually to covert an osg:Image to a wxImage right? Well... in my case, I need to convert a wxImage to an osg:Image. So that I can apply it as a texture on my GL_QUAD. Anyway, I will look more into your sample code... I might find a starting point! Many Thanks! Best Regards, Lahiru -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=32239#32239 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convert wxImage to osg:Image
Hi Thibault, Thanks a lot for the reply! I will check this out. Thanks again! Best Regards, Lahiru -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=32135#32135 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Convert wxImage to osg:Image
Hi all, I am trying to create a wxImage (bitmap) in runtime using wxMemoryDC, draw a gradient rect on it and apply the bitmap as a texture on a QUAD. But I still couldn't find a proper way to convert the proceed wxImage (with gradient) into a osg:Image. I really appreciate if you can help me with this. Thank you! Best Regards, Lahiru -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=32104#32104 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
