cescreencapture.cpp

通过同步软件来获取移动智能设备屏幕画面

// CeScreenCapture.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
#include "CeScreenCapture.h"
#include "gc.h"
#include "dibsection.h"


BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
					 )
{
    switch (ul_reason_for_call)
	{
		case DLL_PROCESS_ATTACH:
		case DLL_THREAD_ATTACH:
		case DLL_THREAD_DETACH:
		case DLL_PROCESS_DETACH:
			break;
    }
    return TRUE;
}


// CeScreenCapture
//
//		Captures the device screen into a bitmap and send the data back to the desktop.
//
CESCREENCAPTURE_API int CeScreenCapture(DWORD cbInput, BYTE* pInput, DWORD* pcbOutput, BYTE** ppOutput, LPVOID pReserved)
{
	CGC		gx;
	int		nScreenX	= GetSystemMetrics(SM_CXSCREEN),
			nScreenY	= GetSystemMetrics(SM_CYSCREEN);

	if(pInput != NULL)
		LocalFree(pInput);	
	*pcbOutput = 0;
	*ppOutput = NULL;

	if(gx.Open(NULL))
	{
		if(gx.BeginDraw())
		{
			CDIBSection	dib;

			if(dib.CreateBitmap(nScreenX, nScreenY, (int)gx.GetBitsPerPixel()))
			{
				int		x, y;
				WORD*	pBits = (WORD*)dib.GetDIBits();

				for(y = nScreenY - 1; y >= 0; --y)
				{
					for(x = 0; x < nScreenX; ++x)
					{
						*pBits++ = gx.GetPixel(x, y);
					}
				}

				DWORD		dwSize;
				BYTE*		pBuffer;
				BITMAPINFO*	pInfo	= dib.GetBitmapInfo();

				pInfo->bmiHeader.biCompression	= BI_BITFIELDS;

				DWORD dw[3];
				if(gx.GetDisplayFormat() & kfDirect555)
				{
					dw[0] = 31744;		// RED bitmask   Bits: 0 11111 00000 00000
					dw[1] = 992;		// GREEN bitmask Bits: 0 00000 11111 00000
					dw[2] = 31;			// BLUE bitmask  Bits: 0 00000 00000 11111
				}
				else if(gx.GetDisplayFormat() & kfDirect565)
				{
					dw[0] = 0xF800;		// RED bitmask   Bits: 11111 000000 00000
					dw[1] = 0x7E0;		// GREEN bitmask Bits: 00000 111111 00000
					dw[2] = 0x1F;		// BLUE bitmask  Bits: 00000 000000 11111
				}

				CopyMemory(dib.GetColorTable(), dw, sizeof(DWORD) * 3);

				dwSize	= sizeof(DIBINFO) + dib.GetImageSize();
				pBuffer	= (BYTE*)LocalAlloc(LPTR, dwSize);
				
				if(pBuffer)
				{
					memcpy(pBuffer, dib.GetBitmapInfo(), sizeof(DIBINFO));
					memcpy(pBuffer + sizeof(DIBINFO), dib.GetDIBits(), dib.GetImageSize());

					*pcbOutput	= dwSize;
					*ppOutput	= pBuffer;
				}
			}
			
			gx.EndDraw();
		}

		gx.Close();
	}

	return 0;
}