void
writeRgba3 (const char fileName[],
const Rgba *pixels,
int width,
int height,
const char comments[],
const M44f &cameraTransform)
{
//
// Write an RGBA image using class RgbaOutputFile.
// Store two extra attributes in the image header:
// a string and a 4x4 transformation matrix.
//
// - open the file
// - describe the memory layout of the pixels
// - store the pixels in the file
//
Header header (width, height);
header.insert ("comments", StringAttribute (comments));
header.insert ("cameraTransform", M44fAttribute (cameraTransform));
RgbaOutputFile file (fileName, header, WRITE_RGBA);
file.setFrameBuffer (pixels, 1, width);
file.writePixels (height);
}
void
writeRgba (const char fileName[],
const Rgba *pixels,
int width,
int height)
{
//
// Write an RGBA image using class RgbaOutputFile.
//
// - open the file
// - describe the memory layout of the pixels
// - store the pixels in the file
//
RgbaOutputFile file (fileName, width, height, WRITE_RGBA);
file.setFrameBuffer (pixels, 1, width);
file.writePixels (height);
}
void ZFnEXR::save(float* data, const char* filename, int width, int height)
{
Array2D<Rgba> px (height, width);
for (int y = 0; y < height; ++y)
{
int invy = height-1-y;
for (int x = 0; x < width; ++x)
{
Rgba &p = px[y][x];
p.r = data[(invy*width+x)*4];
p.g = data[(invy*width+x)*4+1];
p.b = data[(invy*width+x)*4+2];
p.a = data[(invy*width+x)*4+3];
}
}
RgbaOutputFile file (filename, width, height, WRITE_RGBA);
file.setFrameBuffer (&px[0][0], 1, width);
file.writePixels (height);
}
void
writeRgba2 (const char fileName[],
const Rgba *pixels,
int width,
int height,
const Box2i &dataWindow)
{
//
// Write an RGBA image using class RgbaOutputFile.
// Don't store the whole image in the file, but
// crop it according to the given data window.
//
// - open the file
// - describe the memory layout of the pixels
// - store the pixels in the file
//
Box2i displayWindow (V2i (0, 0), V2i (width - 1, height - 1));
RgbaOutputFile file (fileName, displayWindow, dataWindow, WRITE_RGBA);
file.setFrameBuffer (pixels, 1, width);
file.writePixels (dataWindow.max.y - dataWindow.min.y + 1);
}
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);
}
bool writeEXRStream(const osg::Image &img, std::ostream& fout, const std::string &fileName) const
{
bool writeOK = true;
//Obtain data from texture
int width = img.s();
int height = img.t();
unsigned int pixelFormat = img.getPixelFormat();
int numComponents = img.computeNumComponents(pixelFormat);
unsigned int dataType = img.getDataType();
//Validates image data
//if numbers of components matches
if (!( numComponents == 3 ||
numComponents == 4))
{
writeOK = false;
return false;
}
if (!( dataType == GL_HALF_FLOAT_ARB ||
dataType == GL_FLOAT))
{
writeOK = false;
return false;
}
//Create a stream to save to
C_OStream outStream(&fout);
//Copy data from texture to rgba pixel format
Array2D<Rgba> outPixels(height,width);
//If texture is half format
if (dataType == GL_HALF_FLOAT_ARB)
{
half* pOut = (half*) img.data();
for (long i = height-1; i >= 0; i--)
{
for (long j = 0 ; j < width; j++)
{
outPixels[i][j].r = (*pOut);
pOut++;
outPixels[i][j].g = (*pOut);
pOut++;
outPixels[i][j].b = (*pOut);
pOut++;
if (numComponents >= 4)
{
outPixels[i][j].a = (*pOut);
pOut++;
}
else {
outPixels[i][j].a = 1.0f;
}
}
}
}
else if (dataType == GL_FLOAT)
{
float* pOut = (float*) img.data();
for (long i = height-1; i >= 0; i--)
{
for (long j = 0 ; j < width; j++)
{
outPixels[i][j].r = half(*pOut);
pOut++;
outPixels[i][j].g = half(*pOut);
pOut++;
outPixels[i][j].b = half(*pOut);
pOut++;
if (numComponents >= 4)
{
outPixels[i][j].a = half(*pOut);
pOut++;
}
else
{
outPixels[i][j].a = 1.0f;
}
}
}
}
else
{
//If texture format not supported
return false;
}
try
{
//Write to stream
Header outHeader(width, height);
RgbaOutputFile rgbaFile (outStream, outHeader, WRITE_RGBA);
rgbaFile.setFrameBuffer ((&outPixels)[0][0], 1, width);
rgbaFile.writePixels (height);
}
catch( char * str )
{
writeOK = false;
}
return writeOK;
}
void Exr::writeRgba(const string outf, const Array2D<Rgba> &pix, int w, int h)
{
RgbaOutputFile file (outf.c_str(), w, h, WRITE_RGBA);
file.setFrameBuffer (&pix[0][0], 1, w);
file.writePixels (h);
}
