Init Version

Author: cqm

DrawVideo.cc

@@ -0,0 +1,138 @@
+#include <windows.h>
+#include <atltypes.h>
+#include "DrawVideo.h"
+
+#define DBG_INFO
+#define GID_DRAWVDO "DrawVdo"
+#pragma comment(lib, "vfw32.lib")
+
+CDrawVideo::CDrawVideo()
+{
+  memset(&m_rect, 0, sizeof m_rect);
+  m_bUseGDI = FALSE;
+  m_bFit = TRUE;
+	m_hDib = DrawDibOpen();
+	if(!m_hDib)
+	{
+		DBG_INFO(GID_DRAWVDO, "***DrawDibOpen error");
+	}
+	Init(NULL);
+}
+
+CDrawVideo::~CDrawVideo()
+{
+  if (m_hDib){
+    DrawDibClose(m_hDib);
+    m_hDib = NULL;
+  }
+}
+
+void CDrawVideo::SetFitMode(BOOL bFit){
+  m_bFit = bFit;
+}
+
+void CDrawVideo::Draw(BYTE *pBuffer,int width, int height, LPCTSTR szText)
+{
+	if(!IsWindow(m_hWnd))
+	{
+		DBG_INFO(GID_DRAWVDO, "no window %X, break draw", m_hWnd);
+		return;
+	}
+	BOOL bVisible = (GetWindowLong(m_hWnd, GWL_STYLE) & WS_VISIBLE);
+	if(!bVisible){ //IsWindowVisible(m_hWnd)
+		DBG_INFO(GID_DRAWVDO, "m_hWnd %X not Visible skip draw", m_hWnd);
+		return;
+	}
+	//DBG_TRACE("DrawVideo", "Draw");
+	HDC hDC=::GetDC(m_hWnd);
+	if(!hDC){
+		DBG_INFO(GID_DRAWVDO, "unable to GetDC %X, break draw", m_hWnd);
+		return ;
+	}
+	CRect destRect;
+	if(!GetClientRect(m_hWnd, &destRect))
+	{
+		DBG_INFO(GID_DRAWVDO, "unable to GetClientRect %X,%d break draw", m_hWnd, GetLastError());
+		ReleaseDC(m_hWnd,hDC);
+		return;
+	}
+	if(destRect.IsRectEmpty())
+	{
+		DBG_INFO(GID_DRAWVDO, "***rect empty, GWL_STYLE: %X", GetWindowLong(m_hWnd, GWL_STYLE));
+		ReleaseDC(m_hWnd,hDC);
+		return;
+	}
+	if(destRect != m_rect)
+	{
+		DBG_INFO(GID_DRAWVDO, "MoveRect from %d,%d,%d,%d to %d,%d,%d,%d", 
+			m_rect.left, m_rect.top, m_rect.right, m_rect.bottom, 
+			destRect.left, destRect.top, destRect.right, destRect.bottom);
+		m_rect = destRect;
+	}
+	destRect.DeflateRect(1,1);
+  if (pBuffer)
+  {
+    bih.bmiHeader.biWidth = width;
+    bih.bmiHeader.biHeight = height;
+    bih.bmiHeader.biSizeImage = width * height * 3;
+    if (!m_bFit){
+      ::SetBkColor(hDC, m_clrBK);
+      ::ExtTextOut(hDC, 0, 0, ETO_OPAQUE, destRect, NULL, 0, NULL);
+      float fRate = bih.bmiHeader.biWidth * 1.0f / bih.bmiHeader.biHeight;
+      int newW = destRect.Height() * fRate;
+      if (newW > destRect.Width()){
+        int newH = destRect.Width() / fRate;
+        int oldH = destRect.Height();
+        destRect.top = (oldH - newH) / 2;
+        destRect.bottom = destRect.top + newH;
+      }
+      else{
+        int oldW = destRect.Width();
+        destRect.left = (oldW - newW) / 2;
+        destRect.right = destRect.left + newW;
+      }
+    }
+		if(m_bUseGDI){
+			int oldMode = SetStretchBltMode(hDC, COLORONCOLOR);
+			StretchDIBits(hDC, destRect.left, destRect.top, destRect.Width(), destRect.Height(), 
+				0, 0, width, height, pBuffer, &bih, DIB_RGB_COLORS, SRCCOPY);
+			SetStretchBltMode(hDC, oldMode);
+		}
+		else if(!::DrawDibDraw(m_hDib,
+			hDC,
+			destRect.left, // dest : left pos
+			destRect.top, // dest : top pos
+			destRect.Width(), // don't zoom x
+			destRect.Height(), // don't zoom y
+			&bih.bmiHeader, // bmp header info
+			pBuffer,    // bmp data
+			0, // dest : left pos
+			0, // dest : top pos
+			width, // don't zoom x
+			height, // don't zoom y
+			DDF_NOTKEYFRAME ))   // use prev params....//DDF_SAME_DRAW
+				DBG_INFO(GID_DRAWVDO, "DrawDibDraw %X error", m_hWnd);
+
+	}
+	// m_desRect.top = m_desRect.bottom - 20;
+	if(szText && szText[0]){
+		if(1){//GetIniInt("View", "TransText", 0)){
+			SetBkMode(hDC, TRANSPARENT);
+			SetTextColor(hDC, 0xffffff);
+		}
+		// TextOut(hDC, destRect.left+2, destRect.bottom - 20, szText, strlen(szText));
+		DrawText(hDC, szText, -1, destRect, DT_BOTTOM|DT_SINGLELINE);
+	}
+	ReleaseDC(m_hWnd,hDC);
+
+}
+
+BOOL CDrawVideo::Init( HWND hWnd )
+{
+	m_hWnd = hWnd;
+	memset( &bih, 0, sizeof( bih ) );
+	bih.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
+	bih.bmiHeader.biPlanes = 1;
+	bih.bmiHeader.biBitCount = 24;
+	return TRUE;
+}

DrawVideo.h

@@ -0,0 +1,32 @@
+//绘制图像类
+//JC 2013-07-31
+#ifndef AVLIB_DRAWVIDEO_H_
+#define AVLIB_DRAWVIDEO_H_
+#include <Vfw.h>
+class CDrawVideo
+{
+//Attributes
+protected:
+  HWND m_hWnd;
+  HDRAWDIB m_hDib;
+  BITMAPINFO bih;
+  RECT m_rect;
+  BOOL m_bUseGDI;
+  BOOL m_bFit;
+  // 背景色
+  COLORREF m_clrBK;
+public:
+  CDrawVideo();
+  ~CDrawVideo();
+
+  void SetFitMode(BOOL bFit);
+  void SetBkColor(COLORREF color){ m_clrBK = color; }
+
+  BOOL Init(HWND hWnd);
+  void Release(){}
+
+  //绘制RGB数据  数据长度为width*height*3
+  void Draw(BYTE *pBuf,int width, int height, LPCTSTR szText=NULL);
+};
+
+#endif //AVLIB_DRAWVIDEO_H_