[英]Load QPixmap from QByteArray in Qt?
I have a byte array with the contents of an image (in png/bmp or some other format). 我有一个包含图像内容的字节数组(以png / bmp或其他格式)。
How can I load it into a QPixmap? 如何将其加载到QPixmap中?
bool QPixmap::loadFromData ( const QByteArray & data, const char * format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor )
Format here is string literal like "PNG"
or something similar 这里的格式是字符串文字,如"PNG"
或类似的东西
QPixmap p;
QByteArray pData;
// fill array with image
if(p.loadFromData(pData,"PNG"))
{
// do something with pixmap
}
You should use the folowing, where your bytes are in the imageData variable in the format specified by the last parameter: 您应该使用下面的内容,其中您的字节在最后一个参数指定的格式的imageData变量中:
QPixmap pixmap = QPixmap::fromImage(
QImage(
(unsigned char *) imageData,
image_width,
image_height,
QImage::Format_RGB888
)
);
Use this constructor: 使用此构造函数:
QImage ( const uchar * data, int width, int height, Format format )
Here is more info . 这是更多信息 。 After that, you can use QPixmap.convertFromImage()
to create a pixmap. 之后,您可以使用QPixmap.convertFromImage()
创建像素图。
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