How to save myframebuffer as a bmp file

[peterpansh]

Hi, all
I have installed UltraVNC mirror driver .
How to save myframebuffer as a bmp file ( such as c:\test.bmp) .
Thanks!

[robingchan]

Hey I was just playing and working on this.

I got this, it works for me:

http://pastebin.com/7LbCh1fW

Code: Select all

// mirror.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "videodriver.h"

void trackChanges( PCHANGES_BUF, int );
void Draw( void );

BITMAPFILEHEADER *BitmapHeader = ( BITMAPFILEHEADER* ) malloc( sizeof( BITMAPFILEHEADER ) );
BITMAPINFOHEADER *BitmapInfo = ( BITMAPINFOHEADER* ) malloc( sizeof( BITMAPINFOHEADER ) );

int main(int argc, char* argv[])
{
	
	VIDEODRIVER* vDriver = new VIDEODRIVER;
	HDC hDisplayDC = CreateDC( _T( "DISPLAY" ), NULL, NULL, NULL );

	int cxWidth = GetDeviceCaps( hDisplayDC, HORZRES ) ;
	int cyHeight = GetDeviceCaps( hDisplayDC,VERTRES );

	BitmapHeader->bfType = 'MB';	
	BitmapHeader->bfSize = 0;
	BitmapHeader->bfReserved1 = 0;
	BitmapHeader->bfReserved2 = 0;
	BitmapHeader->bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);

	BitmapInfo->biSize = sizeof( BITMAPINFOHEADER );
	BitmapInfo->biWidth = cxWidth;
	BitmapInfo->biHeight = -cyHeight;
	BitmapInfo->biPlanes = 1;
	BitmapInfo->biBitCount = 32;
	BitmapInfo->biCompression = BI_RGB;
	BitmapInfo->biSizeImage= cyHeight * cxWidth * 4;	
	vDriver->VIDEODRIVER_start( 0, 0, cxWidth, cyHeight, 0 );

	if ( !vDriver->mypVideoMemory ) return 0;

	vDriver->HardwareCursor();

	PCHANGES_BUF screenChanges = vDriver->mypchangebuf;
	int previousCounter = 0, Counter = screenChanges->counter;

	while ( true )
	{
		DWORD dwBytesWritten;
		HANDLE hFile = CreateFile("C:\\FRAMEBUFFER.BMP", GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
		WriteFile(hFile, BitmapHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
		WriteFile(hFile, BitmapInfo, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
		WriteFile(hFile, (char*)vDriver->myframebuffer, cxWidth * cyHeight * 4, &dwBytesWritten, NULL);
		CloseHandle(hFile);

		Counter = screenChanges->counter;

		if ( previousCounter != Counter && ( Counter <= 1 || Counter <= 1999 ) )
		{
			previousCounter = Counter;
		
			if ( previousCounter < Counter )
			{
				for ( int i = previousCounter + 1; i <= Counter; i++ )
				{
					trackChanges( screenChanges, i );
				}
			}
			else
			{
				int x = 0;
				for ( x = previousCounter + 1; x < MAXCHANGES_BUF; x++ )
				{
					trackChanges( screenChanges, x );
				}

				for ( x = 1; x <= Counter; x++ )
				{
					trackChanges( screenChanges, x );
				}
			}
		}
	}

	vDriver->VIDEODRIVER_Stop();

	delete vDriver;

	return 0;
}

void trackChanges( PCHANGES_BUF Changes, int i )
{
	POINT Point = Changes->pointrect[i].point;
	RECT  Rect  = Changes->pointrect[i].rect;

	switch ( Changes->pointrect[i].type )
	{
		case SCREEN_SCREEN:
			{
				printf( "screen2screen [X: %i, Y: %i], [Left: %i, Right: %i, Top: %i, Bottom: %i] \n", (int)Point.x, (int)Point.y, (int)Rect.left, (int)Rect.right, (int)Rect.top, (int)Rect.bottom );
			}
			break;

		case BLIT:
			{
				printf( "blit [X: %i, Y: %i], [Left: %i, Right: %i, Top: %i, Bottom: %i] \n", (int)Point.x, (int)Point.y, (int)Rect.left, (int)Rect.right, (int)Rect.top, (int)Rect.bottom );
			}
			break;
	
		default:
			break;
	}
}

Its hacked up from the examples of screentoavi and changed_screen_parts.

[robingchan]

Infact, Here's a slimmed version for your needs. (in the code i posted there ^ i was going to bitblit)

Code: Select all

// mirror.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "videodriver.h"

BITMAPFILEHEADER *BitmapHeader = ( BITMAPFILEHEADER* ) malloc( sizeof( BITMAPFILEHEADER ) );
BITMAPINFOHEADER *BitmapInfo = ( BITMAPINFOHEADER* ) malloc( sizeof( BITMAPINFOHEADER ) );

int main(int argc, char* argv[])
{
	
	VIDEODRIVER* vDriver = new VIDEODRIVER;
	HDC hDisplayDC = CreateDC( _T( "DISPLAY" ), NULL, NULL, NULL );

	int cxWidth = GetDeviceCaps( hDisplayDC, HORZRES ) ;
	int cyHeight = GetDeviceCaps( hDisplayDC,VERTRES );

	BitmapHeader->bfType = 'MB';	
	BitmapHeader->bfSize = 0;
	BitmapHeader->bfReserved1 = 0;
	BitmapHeader->bfReserved2 = 0;
	BitmapHeader->bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);

	BitmapInfo->biSize = sizeof( BITMAPINFOHEADER );
	BitmapInfo->biWidth = cxWidth;
	BitmapInfo->biHeight = -cyHeight;
	BitmapInfo->biPlanes = 1;
	BitmapInfo->biBitCount = 32;
	BitmapInfo->biCompression = BI_RGB;
	BitmapInfo->biSizeImage= cyHeight * cxWidth * 4;	
	vDriver->VIDEODRIVER_start( 0, 0, cxWidth, cyHeight, 0 );

	if ( !vDriver->mypVideoMemory ) return 0;

	vDriver->HardwareCursor();

	PCHANGES_BUF screenChanges = vDriver->mypchangebuf;
	int previousCounter = 0, Counter = screenChanges->counter;

	DWORD dwBytesWritten;
	HANDLE hFile = CreateFile("C:\\FRAMEBUFFER.BMP", GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	WriteFile(hFile, BitmapHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
	WriteFile(hFile, BitmapInfo, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
	WriteFile(hFile, (char*)vDriver->myframebuffer, cxWidth * cyHeight * 4, &dwBytesWritten, NULL);
	CloseHandle(hFile);

	vDriver->VIDEODRIVER_Stop();
	delete vDriver;

	return 0;
}