Hi !
I have problems applying a 3D LUT using "FileTransformRcPtr".
1 - I load my image using OpenImageIO :
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ImageInput *srcImg = ImageInput::open(filename);
ImageSpec *srcSpec = new ImageSpec(srcImg->spec());
unsigned char* srcRGBpixelData = (unsigned
char*)malloc(srcSpec->width*srcSpec->height*3 );
srcImg->read_scanlines( srcSpec->y, srcSpec->y+srcSpec->height, 0, 0, 3,
TypeDesc::UINT8, srcRGBpixelData );
ImageSpec srcBufSpec = ImageSpec ( srcSpec->width, srcSpec->height, 3,
TypeDesc::UINT8 );
ImageBuf srcBuf = ImageBuf( srcBufSpec );
ROI srcRoi = get_roi_full (*srcSpec);
srcBuf.set_pixels( srcRoi, TypeDesc::UINT8, srcRGBpixelData );
srcImg->close();
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2 - store my image in RAM as "unsigned char*"
I would like to apply a 3D LUT to this "raw data" (unsigned char*) and return the result
as "unsigned char*" since this is what Qt supports for QImage data.
Here is what I came up with, it's currently crashing on the
"m_processor->apply(luttedImg); line"
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OCIO::PackedImageDesc luttedImg(reinterpret_cast<float*>(imgCache[curFrame]),
seqSpec->width, seqSpec->height, 3);
try
{
OCIO::ConstConfigRcPtr config = OCIO::GetCurrentConfig();
// Create File Transform
const char *lutPath = "C:/temp/049x050_lut.3dl";
OCIO::FileTransformRcPtr transform = OCIO::FileTransform::Create();
transform->setSrc(lutPath);
transform->setDirection(OCIO::TRANSFORM_DIR_FORWARD);
transform->setInterpolation(OCIO::INTERP_LINEAR);
OCIO::ConstProcessorRcPtr m_processor =
config->getProcessor(transform, OCIO::TRANSFORM_DIR_FORWARD);
// Apply transform
m_processor->apply(luttedImg);
}
catch(OCIO::Exception &e)
{
qDebug() << e.what();
}
// not sure how to go back to "unsigned char*" after transform is applied.
reinterpret_cast<unsigned char*> ????
__________________________________________________________________________________________________________________________
As usual, any help would be greatly appreciated.
Thanks,
Renaud
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