Failed to read HDR files after loading vsgXchange and GDAL

[Shanyzz]

Hello to the VSG Community,

I cannot successfully read HDR files after loading vsgXchange and GDAL. I believe my configuration of vsgXchange and GDAL is correct because vsgXchange_GDAL was successfully defined in my vsgXchange/Version.h, and I have successsfully read DDS files. But I always fail when trying to read HDR files.

The code for reading HDR files is as follows(I am pretty sure that my envfilepath is correct):

#include <vsg/all.h>

#include <vsgXchange/all.h>

...

auto options = vsg::Options::create();

options->add(vsgXchange::all::create());

vsg::Path envfilepath = "../newport.hdr";

auto hdrfile = vsg::read(envfilepath, options);

if (!hdrfile) std::cout << "Faled to load " << std::endl;

Thanks for your time!

[robertosfield]

Could you provide an example file that illustrates this problem. Could you also post you Version.h so we check all the ReaderWriters that are available and may be attempting to read the file.

…

On Sun, 24 Mar 2024, 13:33 Shanyzz, ***@***.***> wrote: Hello to the VSG Community, I cannot successfully read HDR files after loading vsgXchange and GDAL. I believe my configuration of vsgXchange and GDAL is correct because vsgXchange_GDAL was successfully defined in my vsgXchange/Version.h, and I have successsfully read DDS files. But I always fail when trying to read HDR files. The code for reading HDR files is as follows(I am pretty sure that my envfilepath is correct): #include <vsg/all.h> #include <vsgXchange/all.h> ... auto options = vsg::Options::create(); options->add(vsgXchange::all::create()); vsg::Path envfilepath = "../newport.hdr"; auto hdrfile = vsg::read(envfilepath, options); if (!hdrfile) std::cout << "Faled to load " << std::endl; Thanks for your time! — Reply to this email directly, view it on GitHub <#1136>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKEGUBPMC3KTJLTPMQALSLYZ3I4LAVCNFSM6AAAAABFFWTUEGVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZWGQYTKMBVGU> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Shanyzz]

Thanks for your quick reply!!

An example HDR file I got is https://polyhaven.com/a/buikslotermeerplein. And all of my HDR files are downloaded from this site.

The reason I mentioned DDS file above is that I mistakenlly thought that DDS was also a format supported by GDAL. But I just realized that it’s supported by vsgXchange_dds and has nothing to do with GDAL...I am really sorry for the trouble caused by my mistake.

My vsgXchange/Version.h is as follows:

#pragma once

#include <vsgXchange/Export.h>
#include <vsg/core/Version.h>

#ifdef __cplusplus
extern "C"
{
#endif

    #define VSGXCHANGE_VERSION_MAJOR    1
    #define VSGXCHANGE_VERSION_MINOR    1
    #define VSGXCHANGE_VERSION_PATCH    0
    #define VSGXCHANGE_SOVERSION        1

    #define VSGXCHANGE_VERSION_STRING   "1.1.0"
    #define VSGXCHANGE_SOVERSION_STRING "1"

    extern VSGXCHANGE_DECLSPEC struct VsgVersion vsgXchangeGetVersion();
    extern VSGXCHANGE_DECLSPEC const char* vsgXchangeGetVersionString();
    extern VSGXCHANGE_DECLSPEC const char* vsgXchangeGetSOVersionString();

    /// return 0 if the linked vsgXchange was built as static library (default), 1 if the linked vsgXchange library was built as shared/dynamic library.
    /// When building against a shared library, to ensure the correct selection of VSGXCHANGE_DECLSPEC (provided in vsgXchange/Export.h) one must compile with the define VSGXCHANGE_SHARED_LIBRARY
    extern VSGXCHANGE_DECLSPEC int vsgXchangeBuiltAsSharedLibrary();

    /// standard Features
    #define vsgXchange_all
    #define vsgXchange_images
    #define vsgXchange_models
    #define vsgXchange_stbi
    #define vsgXchange_dds
    #define vsgXchange_ktx
    #define vsgXchange_spv
    #define vsgXchange_cpp

    /// optional Features
/* #undef vsgXchange_curl */
/* #undef vsgXchange_openexr */
    #define vsgXchange_freetype
    #define vsgXchange_assimp
    #define vsgXchange_GDAL
/* #undef vsgXchange_OSG */

#ifdef __cplusplus
}
#endif

Thanks for your time again!

[robertosfield]

I have downloaded a .exr and .hdr files for the same image from the provided link and the .exr loads fine once I installed libopenexr-dev and then rebuild vsgXchange/vsgExamples, but the .hdr file doesn't load. GDAL looks like it says it supports .hdr when queried about the extensions it supports as reported by vsgconv:

$vsgconv --features vsgXchange::GDAL

vsgXchange::GDAL provides support for 93 extensions, and 0 protocols.
    Extensions      Supported ReaderWriter methods
    ----------      ------------------------------
    .ACE2           read(vsg::Path, ..) 
    .asc            read(vsg::Path, ..) 
    .bag            read(vsg::Path, ..) 
    .bil            read(vsg::Path, ..) 
    .bin            read(vsg::Path, ..) 
    .blx            read(vsg::Path, ..) 
    .bmp            read(vsg::Path, ..) 
    .bt             read(vsg::Path, ..) 
    .byn            read(vsg::Path, ..) 
    .cal            read(vsg::Path, ..) 
    .ct1            read(vsg::Path, ..) 
    .cub            read(vsg::Path, ..) 
    .dat            read(vsg::Path, ..) 
    .ddf            read(vsg::Path, ..) 
    .dem            read(vsg::Path, ..) 
    .dgrda          read(vsg::Path, ..) 
    .dt0            read(vsg::Path, ..) 
    .dt1            read(vsg::Path, ..) 
    .dt2            read(vsg::Path, ..) 
    .dwg            read(vsg::Path, ..) 
    .err            read(vsg::Path, ..) 
    .ers            read(vsg::Path, ..) 
    .fits           read(vsg::Path, ..) 
    .gen            read(vsg::Path, ..) 
    .gff            read(vsg::Path, ..) 
    .gif            read(vsg::Path, ..) 
    .gpkg           read(vsg::Path, ..) 
    .grb            read(vsg::Path, ..) 
    .grb2           read(vsg::Path, ..) 
    .grc            read(vsg::Path, ..) 
    .grd            read(vsg::Path, ..) 
    .grib2          read(vsg::Path, ..) 
    .gsb            read(vsg::Path, ..) 
    .gtx            read(vsg::Path, ..) 
    .gvb            read(vsg::Path, ..) 
    .gxf            read(vsg::Path, ..) 
    .h5             read(vsg::Path, ..) 
    .hdf            read(vsg::Path, ..) 
    .hdf5           read(vsg::Path, ..) 
    .hdr            read(vsg::Path, ..) 
    .heic           read(vsg::Path, ..) 
    .hf2            read(vsg::Path, ..) 
    .hgt            read(vsg::Path, ..) 
    .img            read(vsg::Path, ..) 
    .isg            read(vsg::Path, ..) 
    .j2k            read(vsg::Path, ..) 
    .jls            read(vsg::Path, ..) 
    .jp2            read(vsg::Path, ..) 
    .jpeg           read(vsg::Path, ..) 
    .jpg            read(vsg::Path, ..) 
    .json           read(vsg::Path, ..) 
    .kml            read(vsg::Path, ..) 
    .kmz            read(vsg::Path, ..) 
    .kro            read(vsg::Path, ..) 
    .lbl            read(vsg::Path, ..) 
    .lcp            read(vsg::Path, ..) 
    .map            read(vsg::Path, ..) 
    .mbtiles        read(vsg::Path, ..) 
    .mem            read(vsg::Path, ..) 
    .mpl            read(vsg::Path, ..) 
    .mpr            read(vsg::Path, ..) 
    .mrf            read(vsg::Path, ..) 
    .n1             read(vsg::Path, ..) 
    .nat            read(vsg::Path, ..) 
    .nc             read(vsg::Path, ..) 
    .ntf            read(vsg::Path, ..) 
    .pdf            read(vsg::Path, ..) 
    .pgm            read(vsg::Path, ..) 
    .pix            read(vsg::Path, ..) 
    .png            read(vsg::Path, ..) 
    .pnm            read(vsg::Path, ..) 
    .ppi            read(vsg::Path, ..) 
    .ppm            read(vsg::Path, ..) 
    .prf            read(vsg::Path, ..) 
    .rda            read(vsg::Path, ..) 
    .rgb            read(vsg::Path, ..) 
    .rik            read(vsg::Path, ..) 
    .rst            read(vsg::Path, ..) 
    .rsw            read(vsg::Path, ..) 
    .sdat           read(vsg::Path, ..) 
    .sg-grd-z       read(vsg::Path, ..) 
    .sigdem         read(vsg::Path, ..) 
    .sqlite         read(vsg::Path, ..) 
    .ter            read(vsg::Path, ..) 
    .tga            read(vsg::Path, ..) 
    .tif            read(vsg::Path, ..) 
    .tiff           read(vsg::Path, ..) 
    .toc            read(vsg::Path, ..) 
    .vrt            read(vsg::Path, ..) 
    .webp           read(vsg::Path, ..) 
    .xml            read(vsg::Path, ..) 
    .xpm            read(vsg::Path, ..) 
    .xyz            read(vsg::Path, ..) 

I put some debugging output into the vsgXchange/src/GDAL.cpp and this confirms that vsgXchange is passing on the correct filename to GDALOpenShared but this is return a nullptr.

I don't know why GDAL is failing to load the image, I can't personally provide support on GDAL so the best I can recommend is to either use .exr format or investigate the issues with reading .hdr directly with GDAL and it's community.

[Shanyzz]

Okay, I get it. Thank you for your time and reply again!