本文整理匯總了C++中tr1::shared_ptr::rows方法的典型用法代碼示例。如果您正苦於以下問題：C++ shared_ptr::rows方法的具體用法？C++ shared_ptr::rows怎麽用？C++ shared_ptr::rows使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類tr1::shared_ptr的用法示例。
在下文中一共展示了shared_ptr::rows方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C++代碼示例。
示例1: AddMagickImage
// Get pointer to QImage of frame
void Frame::AddMagickImage(tr1::shared_ptr<Magick::Image> new_image)
{
const int BPP = 4;
const std::size_t bufferSize = new_image->columns() * new_image->rows() * BPP;
/// Use realloc for fast memory allocation.
/// TODO: consider locking the buffer for mt safety
//qbuffer = reinterpret_cast<unsigned char*>(realloc(qbuffer, bufferSize));
qbuffer = new unsigned char[bufferSize]();
unsigned char *buffer = (unsigned char*)qbuffer;
// Iterate through the pixel packets, and load our own buffer
// Each color needs to be scaled to 8 bit (using the ImageMagick built-in ScaleQuantumToChar function)
int numcopied = 0;
Magick::PixelPacket *pixels = new_image->getPixels(0,0, new_image->columns(), new_image->rows());
for (int n = 0, i = 0; n < new_image->columns() * new_image->rows(); n += 1, i += 4) {
buffer[i+0] = MagickCore::ScaleQuantumToChar((Magick::Quantum) pixels[n].red);
buffer[i+1] = MagickCore::ScaleQuantumToChar((Magick::Quantum) pixels[n].green);
buffer[i+2] = MagickCore::ScaleQuantumToChar((Magick::Quantum) pixels[n].blue);
buffer[i+3] = 255 - MagickCore::ScaleQuantumToChar((Magick::Quantum) pixels[n].opacity);
numcopied+=4;
}
// Create QImage of frame data
image = tr1::shared_ptr<QImage>(new QImage(qbuffer, width, height, width * BPP, QImage::Format_RGBA8888, (QImageCleanupFunction) &cleanUpBuffer, (void*) qbuffer));
// Update height and width
width = image->width();
height = image->height();
}