SDK v5.10.01 VFB can not save image

[jam_nolastname]

demo code:
int main(int argc, char **argv)
{
RendererOptions ro;
ro.showFrameBuffer = true;
ro.enableFrameBuffer = true;
VRayInit init(true);
VRayRenderer* renderer;
try
{
renderer = new VRayRenderer(ro);
renderer->vfb.show(true, true);
}
catch (const VRay::VRayException ex)
{
std::cout << ex.what() << std::endl;
}

bool result = renderer->vfb.loadImage("123.exr");
result = renderer->vfb.saveImage("123.bmp");
}
Same code in SDK 4.30.3.1 works fine,but in SDK 5.10.01
VFB UI can't display, vfb.loadimage return true,but vfb.saveimage return false.

[dimitar.bashliev]

Hi, I just tried those functionalities and everything seems okay. What OS are you using? Also, check if renderer->getLastError() has any error in it.

[jam_nolastname]

I have try it on win10 and CentOS7,both return false. renderer->getLastError() return "File write error."

[dimitar.bashliev]

Okay, the first thing to check is why the VFB UI is not showing. Can you try to attach a callback to the LogMessage event before you try to show the VFB and copy the log:

void logMessage(VRay::VRayRenderer &renderer, const char* message, VRay::MessageLevel level, double instant, void* userData) {
    switch (level) {
    case VRay::MessageError:
        printf("[ERROR] %s\n", message);
        break;
    case VRay::MessageWarning:
        printf("[Warning] %s\n", message);
        break;
    case VRay::MessageInfo:
        printf("[info] %s\n", message);
        break;
    case VRay::MessageDebug:
        // Uncomment for testing, but you might want to ignore these in real code
        printf("[debug] %s\n", message);
        break;
    }
}

...

renderer = new VRayRenderer(ro);
renderer->setOnLogMessage(logMessage);
renderer->vfb.show(true, true);

Also, does the VFB UI display if you start an actual render, or you can't make it appear at all?

[jam_nolastname]

Okay, the first thing to check is why the VFB UI is not showing. Can you try to attach a callback to the LogMessage event before you try to show the VFB and copy the log:

void logMessage(VRay::VRayRenderer &renderer, const char* message, VRay::MessageLevel level, double instant, void* userData) {
switch (level) {
case VRay::MessageError:
printf("[ERROR] %s\n", message);
break;
case VRay::MessageWarning:
printf("[Warning] %s\n", message);
break;
case VRay::MessageInfo:
printf("[info] %s\n", message);
break;
case VRay::MessageDebug:
// Uncomment for testing, but you might want to ignore these in real code
printf("[debug] %s\n", message);
break;
}
}

...

renderer = new VRayRenderer(ro);
renderer->setOnLogMessage(logMessage);
renderer->vfb.show(true, true);

Also, does the VFB UI display if you start an actual render, or you can't make it appear at all?

The VFB UI can't display in debug mode (VS2017). When I start an actual render, it can display normally. So this question doesn't matter much.

I try to sleep 5 second after vfb.loadimage, then vfb.saveimage return true. The image created correctly.

Is vfb.loadimage executed asynchronously? How do I know the execution is over?

[dimitar.bashliev]

It turns out that this was in fact a problem - loadImage returns before the image is fully loaded. It has already been fixed, so if you try any build after April 27, you should be okay.

[jam_nolastname]

It turns out that this was in fact a problem - loadImage returns before the image is fully loaded. It has already been fixed, so if you try any build after April 27, you should be okay.

Thanks a lot! But I can't found any build after April 27 in https://nightlies.chaosgroup.com/ or https://download.chaosgroup.com/?lic...254&product=49

[dimitar.bashliev]

Can you check the nightlies again? It should be visible now.

[jam_nolastname]

Can you check the nightlies again? It should be visible now.

Thank you very much. Everything is okay now!