whellvalue/src/lpbdesigner/colossusbase.cpp

#include "colossusbase.h"
#include "qlabel.h"
#include <QPixmap>
#include "opencv.hpp"
#include "core\mat.hpp"
cv::Mat ColossusBase::QImage2cvMat(QImage image)
{
	cv::Mat mat;
	switch (image.format())
	{
	case QImage::Format_ARGB32:
	case QImage::Format_RGB32:
	case QImage::Format_ARGB32_Premultiplied:
		mat = cv::Mat(image.height(), image.width(), CV_8UC4, (void*)image.constBits(), image.bytesPerLine());
		break;
	case QImage::Format_RGB888:
		mat = cv::Mat(image.height(), image.width(), CV_8UC3, (void*)image.constBits(), image.bytesPerLine());
		cvtColor(mat, mat, CV_BGR2RGB);
		break;
	case QImage::Format_Indexed8:
		mat = cv::Mat(image.height(), image.width(), CV_8UC1, (void*)image.constBits(), image.bytesPerLine());
		break;
	}
	return mat;
}

QImage* ColossusBase::convMat2QImage(cv::Mat & img)
{
	if (img.empty())
	{
		return NULL;
	}
	int h = img.rows;// iplimg->height;
	int w = img.cols;// iplimg->width;
	int channels = img.channels();// ->nChannels;


	QImage *qimg = new QImage(w, h, QImage::Format_ARGB32);
	if (h*w*channels <= 0)
	{
		return qimg;
	}

	uchar *data = img.data;// ->imageData;

	for (int y = 0; y < h; y++, data += img.step/*->widthStep*/)
	{
		for (int x = 0; x < w; x++)
		{
			char r, g, b, a = 0;
			if (channels == 1)
			{
				r = data[x*channels];
				g = data[x*channels];
				b = data[x*channels];
			}
			else if (channels == 3 || channels == 4)
			{
				r = data[x*channels + 2];
				g = data[x*channels + 1];
				b = data[x*channels];
			}

			if (channels == 4)
			{
				a = data[x*channels + 3];
				qimg->setPixel(x, y, qRgba(r, g, b, a));
			}
			else
			{
				qimg->setPixel(x, y, qRgb(r, g, b));
			}
		}
	}
	return qimg;
}

QImage * ColossusBase::imgScale(QImage *img, int nWidth, int nHeight)
{
	if (!img)
	{
		return NULL;
	}
	if (img->width() / img->height() >= nWidth / nHeight)
	{
		*img = img->scaledToWidth(nWidth);
	}
	else
	{
		*img = img->scaledToHeight(nHeight);
	}
	return img;
}

QImage * ColossusBase::imgScale(QImage &img, int nWidth /*= 480*/, int nHeight /*= 360*/)
{
	if (img.width() / img.height() >= nWidth / nHeight)
	{
		img = img.scaledToWidth(nWidth);
	}
	else
	{
		img = img.scaledToHeight(nHeight);
	}
	return &img;
}

bool ColossusBase::showImage(cv::Mat & src, QLabel *pLabel)
{
	if (src.empty())
	{
		return false;
	}

	QImage* img = ColossusBase::convMat2QImage(src);
	img = ColossusBase::imgScale(img);

	pLabel->setPixmap(QPixmap::fromImage(*img));
	pLabel->show();
	delete img;
	return true;
}

bool ColossusBase::showImage(cv::Mat & src, lpImgViewer *pImgViewer)
{
	if (src.empty())
	{
		pImgViewer->clear();
		return false;
	}

	QImage* img = ColossusBase::convMat2QImage(src);

	showImage(*img, pImgViewer);

	delete img;
	return true;
}

bool ColossusBase::showImage(QImage& img, lpImgViewer *pImgViewer)
{
	pImgViewer->setImg(img);

	return true;
}