GDALResourceHandler

#ifndef OSGEARTH_CEF_GDAL_RESOURCE_HANDLER
#define OSGEARTH_CEF_GDAL_RESOURCE_HANDLER 1

#include "include/cef_resource_handler.h"
#include "include/cef_scheme.h"

#include <osg/Image>

namespace osgEarth { namespace Cef
{

    // Implements a resource handler for previewing GDAL files
    // You can specify a url of the type gdal://gdal/path/to/file.tif and this will return a jpeg preview of the image.
    class GDALResourceHandler : public CefResourceHandler {
    public:
        GDALResourceHandler();

        virtual bool ProcessRequest(CefRefPtr<CefRequest> request, CefRefPtr<CefCallback> callback) OVERRIDE;

        virtual void GetResponseHeaders(CefRefPtr<CefResponse> response, int64& response_length, CefString& redirectUrl) OVERRIDE;

        virtual void Cancel() OVERRIDE;

        virtual bool ReadResponse(void* data_out, int bytes_to_read, int& bytes_read, CefRefPtr<CefCallback> callback) OVERRIDE;

    private:
        IMPLEMENT_REFCOUNTING(GDALResourceHandler);

        osg::ref_ptr< osg::Image> _image;
        int _readOffset;
        std::string _data;
    };



    class GDALHandlerFactory : public CefSchemeHandlerFactory
    {
    public:
        virtual CefRefPtr<CefResourceHandler> Create(CefRefPtr<CefBrowser> browser,
            CefRefPtr<CefFrame> frame,
            const CefString& scheme_name,
            CefRefPtr<CefRequest> request)
            OVERRIDE;

        IMPLEMENT_REFCOUNTING(GDALHandlerFactory);
    };

} }

#endif