//----------------------------------------------------------------------------------------------------------------------
// Open Image I/O loading routines
//----------------------------------------------------------------------------------------------------------------------
bool Image::load( const std::string &_fname ) noexcept
{
#ifdef IMAGE_DEBUG_ON
std::cerr<<"loading with OpenImageIO"<<std::endl;
#endif
OpenImageIO::ImageInput *in = OpenImageIO::ImageInput::open (_fname);
if (! in)
{
return false;
}
const OpenImageIO::ImageSpec &spec = in->spec();
m_width = spec.width;
m_height = spec.height;
m_channels = spec.nchannels;
if(m_channels==3)
m_format=GL_RGB;
else if(m_channels==4)
m_format=GL_RGBA;
m_data.reset(new unsigned char[ m_width*m_height*m_channels]);
// this will read an flip the pixel for OpenGL
int scanlinesize = spec.width * spec.nchannels * sizeof(m_data[0]);
in->read_image (OpenImageIO::TypeDesc::UINT8,
(char *)m_data.get() + (m_height-1)*scanlinesize, // offset to last
OpenImageIO::AutoStride, // default x stride
-scanlinesize, // special y stride
OpenImageIO::AutoStride); // default z stride
//in->read_image (OpenImageIO::TypeDesc::UINT8, &m_data[0]);
in->close ();
delete in;
return true;
}
// Read bokeh image
imageData* readImage(char const *bokeh_kernel_filename){
imageData* img = new imageData;
AiMsgInfo("Reading image using OpenImageIO: %s", bokeh_kernel_filename);
//Search for an ImageIO plugin that is capable of reading the file ("foo.jpg"), first by
//trying to deduce the correct plugin from the file extension, but if that fails, by opening
//every ImageIO plugin it can find until one will open the file without error. When it finds
//the right plugin, it creates a subclass instance of ImageInput that reads the right kind of
//file format, and tries to fully open the file.
OpenImageIO::ImageInput *in = OpenImageIO::ImageInput::open (bokeh_kernel_filename);
if (! in){
return nullptr; // Return a null pointer if we have issues
}
const OpenImageIO::ImageSpec &spec = in->spec();
img->x = spec.width;
img->y = spec.height;
img->nchannels = spec.nchannels;
img->pixelData.clear();
img->pixelData.reserve(img->x * img->y * img->nchannels);
in->read_image (OpenImageIO::TypeDesc::UINT8, &img->pixelData[0]);
in->close ();
delete in;
AiMsgInfo("Image Width: %d", img->x);
AiMsgInfo("Image Height: %d", img->y);
AiMsgInfo("Image Channels: %d", img->nchannels);
AiMsgInfo("Total amount of pixels to process: %d", img->x * img->y);
if (debug == true){
// print out raw pixel data
for (int i = 0; i < img->x * img->y * img->nchannels; i++){
int j = 0;
if(img->nchannels == 3){
if (j == 0){
std::cout << "[";
std::cout << (int)img->pixelData[i];
std::cout << ", ";
j += 1;
}
if (j == 1){
std::cout << (int)img->pixelData[i];
std::cout << ", ";
j += 1;
}
if (j == 2){
std::cout << (int)img->pixelData[i];
std::cout << "], ";
j = 0;
}
}
else if(img->nchannels == 4){
if (j == 0){
std::cout << "[";
std::cout << (int)img->pixelData[i];
std::cout << ", ";
j += 1;
}
if (j == 1){
std::cout << (int)img->pixelData[i];
std::cout << ", ";
j += 1;
}
if (j == 2){
std::cout << (int)img->pixelData[i];
std::cout << ", ";
j += 1;
}
if (j == 3){
std::cout << (int)img->pixelData[i];
std::cout << "], ";
j = 0;
}
}
}
std::cout << "----------------------------------------------" << std::endl;
std::cout << "----------------------------------------------" << std::endl;
}
return img;
}
