void
readHeader (const char fileName[])
{
//
// Read an image's header from a file, and if the header
// contains comments and camera transformation attributes,
// print the values of those attributes.
//
// - open the file
// - get the file header
// - look for the attributes
//
RgbaInputFile file (fileName);
const StringAttribute *comments =
file.header().findTypedAttribute <StringAttribute> ("comments");
const M44fAttribute *cameraTransform =
file.header().findTypedAttribute <M44fAttribute> ("cameraTransform");
if (comments)
cout << "comments\n " << comments->value() << endl;
if (cameraTransform)
cout << "cameraTransform\n" << cameraTransform->value() << flush;
}
bool ImageIO::readImage(const QString& filePath,
Array<Rgba>& pixels,
int& width,
int &height)
{
RgbaInputFile* in;
try
{
QString remapped = remapFilePath(filePath);
in = new RgbaInputFile(remapped.toStdString().c_str());
}
catch (const std::exception &e)
{
qWarning() << e.what();
return false;
}
Header header = in->header();
Box2i &dataWindow = header.dataWindow();
int dw = dataWindow.max.x - dataWindow.min.x + 1;
int dh = dataWindow.max.y - dataWindow.min.y + 1;
int dx = dataWindow.min.x;
int dy = dataWindow.min.y;
pixels.resizeErase(dw * dh);
in->setFrameBuffer(pixels - dx - dy * dw, 1, dw);
try
{
in->readPixels (dataWindow.min.y, dataWindow.max.y);
}
catch (const std::exception &e)
{
delete in;
qWarning() << e.what();
return false;
}
width = dw;
height = dh;
delete in;
return true;
}
void
exrCtlExr (const char inFileName[],
const char outFileName[],
const std::vector<std::string> &transformNames,
const AttrMap &extraAttrs,
int numThreads,
bool verbose)
{
setGlobalThreadCount (numThreads);
//
// Read the input file
//
if (verbose)
cout << "reading file " << inFileName << endl;
RgbaInputFile in (inFileName);
const Box2i &dw = in.dataWindow();
int w = dw.max.x - dw.min.x + 1;
int h = dw.max.y - dw.min.y + 1;
Array2D<Rgba> inPixels (h, w);
in.setFrameBuffer (&inPixels[0][0] - dw.min.x - dw.min.y * w, 1, w);
in.readPixels (dw.min.y, dw.max.y);
//
// Apply the CTL transforms to the R, G and B channels of the input file
//
if (verbose)
{
cout << "applying CTL transforms:";
for (int i = 0; i < transformNames.size(); ++i)
cout << " " << transformNames[i];
cout << endl;
}
Header outHeader = in.header();
Array2D<Rgba> outPixels (h, w);
applyCtlExrToExr (in.header(), outHeader,
inPixels, outPixels,
w, h,
transformNames,
extraAttrs);
//
// Just in case one of the CTL transforms decided to mess
// with the data window in the output header, avoid a crash
// by resetting the data window to its original value.
//
outHeader.dataWindow() = in.header().dataWindow();
//
// If the input pixels have an A channel, copy it into
// the output pixels.
//
if (in.channels() & WRITE_A)
{
const Rgba *inPtr = &inPixels[0][0];
Rgba *outPtr = &outPixels[0][0];
size_t numPixels = w * h;
for (size_t i = 0; i < numPixels; ++i)
(outPtr++)->a = (inPtr++)->a;
}
//
// Write the output file
//
if (verbose)
cout << "writing file " << outFileName << endl;
RgbaOutputFile out (outFileName, outHeader, in.channels());
out.setFrameBuffer (&outPixels[0][0] - dw.min.x - dw.min.y * w, 1, w);
out.writePixels (h);
}
void
exrToDpx (const char exrFileName[],
const char dpxFileName[],
std::vector<std::string> transformNames,
bool verbose)
{
//
// Read the OpenEXR file
//
if (verbose)
cout << "reading file " << exrFileName << endl;
RgbaInputFile in (exrFileName);
Box2i dw = in.dataWindow();
unsigned int width = (unsigned int) (dw.max.x - dw.min.x + 1);
unsigned int height = (unsigned int) (dw.max.y - dw.min.y + 1);
Array2D<Rgba> pixels (height, width);
in.setFrameBuffer (&pixels[0][0] - dw.min.x - dw.min.y * width, 1, width);
in.readPixels (dw.min.y, dw.max.y);
//
// Apply the CTL transforms
//
if (verbose)
{
cout << "applyging CTL transforms:";
for (int i = 0; i < transformNames.size(); ++i)
cout << " " << transformNames[i];
cout << endl;
}
applyCtlExrToDpx (transformNames,
in.header(),
pixels,
width, height,
pixels);
//
// Write the DPX file
//
if (verbose)
cout << "writing file " << dpxFileName << endl;
ofstream out (dpxFileName, ios_base::binary);
if (!out)
{
THROW_ERRNO ("Cannot open file " << dpxFileName << " "
"for writing (%T).");
}
writeHeader (out, dpxFileName, width, height);
writePixels (out, dpxFileName, width, height, pixels);
if (verbose)
cout << "done" << endl;
}