Hi,
I would like to read exr files with linear color space. For that I'm
using OIIO but my viewer(Qt's QGraphicsView) shows the picture with sRGB
color space.
How should I read log or linear color space inputs? Should I use
OpenColorIO for that task or develop an algorithm that converts from
sRGB to linear(lookup table)? I've copied the piece of code that it's
reading the file. Could you tell me if I'm reading correctly the files?
QImage newQImage( spec.width, spec.height, QImage::Format_RGB32 );
int size = spec.width*spec.nchannels;
for (int y = 0; y < spec.height; y++) {
unsigned char *pixels = new unsigned char[ size ];
in->read_scanline( y+spec.y, 0+spec.z, TypeDesc::UINT8, pixels );
for ( int x = 0; x < spec.width; x++ )
{
float r = 0;
float g = 0;
float b = 0;
unsigned char *p = ( (unsigned char*) (pixels) );
for(int i=0; i<spec.nchannels; ++i)
{
int mod = i%spec.nchannels;
if(mod ==0)
{
r = ((*p) & 0xff);
}
else if(mod ==1)
{
g = ((*p) & 0xff);
}
else if(mod ==2)
{
b = ((*p) & 0xff);
}
p++;
}
newQImage.setPixel( x, y, qRgb( r, g, b ) );
pixels = p;
}
}
Thank you very much,
Jero
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