#include "StdAfx.h"
#include "CvvImage.h"

CV_INLINE RECT NormalizeRect(RECT r);
CV_INLINE RECT NormalizeRect(RECT r)
{
	int t;
	if (r.left > r.right)
	{
		t = r.left;
		r.left = r.right;
		r.right = t;
	}
	if (r.top > r.bottom)
	{
		t = r.top;
		r.top = r.bottom;
		r.bottom = t;
	}

	return r;
}
CV_INLINE CvRect RectToCvRect(RECT sr);
CV_INLINE CvRect RectToCvRect(RECT sr)
{
	sr = NormalizeRect(sr);
	return cvRect(sr.left, sr.top, sr.right - sr.left, sr.bottom - sr.top);
}
CV_INLINE RECT CvRectToRect(CvRect sr);
CV_INLINE RECT CvRectToRect(CvRect sr)
{
	RECT dr;
	dr.left = sr.x;
	dr.top = sr.y;
	dr.right = sr.x + sr.width;
	dr.bottom = sr.y + sr.height;

	return dr;
}
CV_INLINE IplROI RectToROI(RECT r);
CV_INLINE IplROI RectToROI(RECT r)
{
	IplROI roi;
	r = NormalizeRect(r);
	roi.xOffset = r.left;
	roi.yOffset = r.top;
	roi.width = r.right - r.left;
	roi.height = r.bottom - r.top;
	roi.coi = 0;

	return roi;
}
void  FillBitmapInfo(BITMAPINFO* bmi, int width, int height, int bpp, int origin)
{
	assert(bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32));

	BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);

	memset(bmih, 0, sizeof(*bmih));
	bmih->biSize = sizeof(BITMAPINFOHEADER);
	bmih->biWidth = width;
	bmih->biHeight = origin ? abs(height) : -abs(height);
	bmih->biPlanes = 1;
	bmih->biBitCount = (unsigned short)bpp;
	bmih->biCompression = BI_RGB;
	if (bpp == 8)
	{
		RGBQUAD* palette = bmi->bmiColors;
		int i;
		for (i = 0; i < 256; i++)
		{
			palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
			palette[i].rgbReserved = 0;
		}
	}
}
CvvImage::CvvImage()
{
	m_img = 0;
}
void CvvImage::Destroy()
{
	cvReleaseImage(&m_img);
}
CvvImage::~CvvImage()
{
	Destroy();
}
bool  CvvImage::Create(int w, int h, int bpp, int origin)
{
	const unsigned max_img_size = 10000;

	if ((bpp != 8 && bpp != 24 && bpp != 32) ||
		(unsigned)w >= max_img_size || (unsigned)h >= max_img_size ||
		(origin != IPL_ORIGIN_TL && origin != IPL_ORIGIN_BL))
	{
		assert(0); // most probably, it is a programming error
		return false;
	}
	if (!m_img || Bpp() != bpp || m_img->width != w || m_img->height != h)
	{
		if (m_img && m_img->nSize == sizeof(IplImage))
			Destroy();
		/* prepare IPL header */
		m_img = cvCreateImage(cvSize(w, h), IPL_DEPTH_8U, bpp / 8);
	}
	if (m_img)
		m_img->origin = origin == 0 ? IPL_ORIGIN_TL : IPL_ORIGIN_BL;
	return m_img != 0;
}
void  CvvImage::CopyOf(CvvImage& image, int desired_color)
{
	IplImage* img = image.GetImage();
	if (img)
	{
		CopyOf(img, desired_color);
	}
}
#define HG_IS_IMAGE(img)                                                  \
   ((img) != 0 && ((const IplImage*)(img))->nSize == sizeof(IplImage) && \
   ((IplImage*)img)->imageData != 0)
void  CvvImage::CopyOf(IplImage* img, int desired_color)
{
	if (HG_IS_IMAGE(img))
	{
		int color = desired_color;
		CvSize size = cvGetSize(img);
		if (color < 0)
			color = img->nChannels > 1;
		if (Create(size.width, size.height,
			(!color ? 1 : img->nChannels > 1 ? img->nChannels : 3) * 8,
			img->origin))
		{
			cvConvertImage(img, m_img, 0);
		}
	}
}
bool  CvvImage::Load(const char* filename, int desired_color)
{
	IplImage* img = cvLoadImage(filename, desired_color);
	if (!img)
		return false;

	CopyOf(img, desired_color);
	cvReleaseImage(&img);

	return true;
}
bool  CvvImage::LoadRect(const char* filename,
	int desired_color, CvRect r)
{
	if (r.width < 0 || r.height < 0) return false;

	IplImage* img = cvLoadImage(filename, desired_color);
	if (!img)
		return false;
	if (r.width == 0 || r.height == 0)
	{
		r.width = img->width;
		r.height = img->height;
		r.x = r.y = 0;
	}
	if (r.x > img->width || r.y > img->height ||
		r.x + r.width < 0 || r.y + r.height < 0)
	{
		cvReleaseImage(&img);
		return false;
	}
	/* truncate r to source image */
	if (r.x < 0)
	{
		r.width += r.x;
		r.x = 0;
	}
	if (r.y < 0)
	{
		r.height += r.y;
		r.y = 0;
	}
	if (r.x + r.width > img->width)
		r.width = img->width - r.x;

	if (r.y + r.height > img->height)
		r.height = img->height - r.y;
	cvSetImageROI(img, r);
	CopyOf(img, desired_color);
	cvReleaseImage(&img);
	return true;
}
bool  CvvImage::Save(const char* filename)
{
	if (!m_img)
		return false;
	cvSaveImage(filename, m_img);
	return true;
}
void  CvvImage::Show(const char* window)
{
	if (m_img)
		cvShowImage(window, m_img);
}
void  CvvImage::Show(HDC dc, int x, int y, int w, int h, int from_x, int from_y)
{
	if (m_img && m_img->depth == IPL_DEPTH_8U)
	{
		uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
		BITMAPINFO* bmi = (BITMAPINFO*)buffer;
		int bmp_w = m_img->width, bmp_h = m_img->height;
		FillBitmapInfo(bmi, bmp_w, bmp_h, Bpp(), m_img->origin);
		from_x = MIN(MAX(from_x, 0), bmp_w - 1);
		from_y = MIN(MAX(from_y, 0), bmp_h - 1);
		int sw = MAX(MIN(bmp_w - from_x, w), 0);
		int sh = MAX(MIN(bmp_h - from_y, h), 0);
		SetDIBitsToDevice(
			dc, x, y, sw, sh, from_x, from_y, from_y, sh,
			m_img->imageData + from_y*m_img->widthStep,
			bmi, DIB_RGB_COLORS);
	}
}
void  CvvImage::DrawToHDC(HDC hDCDst, RECT* pDstRect)
{
	if (pDstRect && m_img && m_img->depth == IPL_DEPTH_8U && m_img->imageData)
	{
		uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
		BITMAPINFO* bmi = (BITMAPINFO*)buffer;
		int bmp_w = m_img->width, bmp_h = m_img->height;
		CvRect roi = cvGetImageROI(m_img);
		CvRect dst = RectToCvRect(*pDstRect);
		if (roi.width == dst.width && roi.height == dst.height)
		{
			Show(hDCDst, dst.x, dst.y, dst.width, dst.height, roi.x, roi.y);
			return;
		}
		if (roi.width > dst.width)
		{
			SetStretchBltMode(
				hDCDst,           // handle to device context
				HALFTONE);
		}
		else
		{
			SetStretchBltMode(
				hDCDst,           // handle to device context
				COLORONCOLOR);
		}
		FillBitmapInfo(bmi, bmp_w, bmp_h, Bpp(), m_img->origin);
		::StretchDIBits(
			hDCDst,
			dst.x, dst.y, dst.width, dst.height,
			roi.x, roi.y, roi.width, roi.height,
			m_img->imageData, bmi, DIB_RGB_COLORS, SRCCOPY);
	}
}
void  CvvImage::Fill(int color)
{
	cvSet(m_img, cvScalar(color & 255, (color >> 8) & 255, (color >> 16) & 255, (color >> 24) & 255));
}