Intermediate C++ lesson 6 -> the window size reference

[NaturalDemon]

in order to pas the Window size or client rect (in technical terms) to the D3DGraphics class,
this is what you have to change

// windows.cpp

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#define WINDOWSIZEX 800
#define WINDOWSIZEY 600

int winSizeX = WINDOWSIZEX;
int winSizeY = WINDOWSIZEY;

int WINAPI wWinMain( HINSTANCE hInst,HINSTANCE,LPWSTR,INT )
{
.
..
...
RECT wr;
	wr.left = 650;
	wr.right = winSizeX + wr.left;
	wr.top = 150;
	wr.bottom = winSizeY + wr.top;
.
..
...
Game theGame( hWnd,kServ,mServ, winSizeX, winSizeY);
.
..
...

// game.h

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class Game
{
public:
	Game( HWND hWnd,const KeyboardServer& kServer,const MouseServer& mServer, int& winSizeX, int& WinSizeX );
.
..
...
/********************************/
	/*  User Variables              */

	int& windowSizeX; // references
	int& windowSizeY;

// game.cpp

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Game::Game( HWND hWnd,const KeyboardServer& kServer,const MouseServer& mServer, int& winSizeX, int& winSizeY )
:	gfx( hWnd, winSizeX /* pass the window size X reference */, winSizeY /* pass the window size Y reference */ ),
	audio( hWnd ),
	kbd( kServer ),
	mouse( mServer ),
	lastMouseX(0),
	lastMouseY(0),
	windowSizeX(winSizeX), // save the window rect for future use
	windowSizeY(winSizeY) // save the window rect for future use
.
..
...

// D3DGraphics.h

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class D3DGraphics
{
public:
	D3DGraphics( HWND hWnd, int& winSizeX, int& winSizeY );
.
..
...
        D3DCOLOR*			sysBuffer; // <-- remember this one

	int& windowSizeX;
	int& windowSizeY;

// D3DGraphics.cpp

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#include <assert.h>

D3DGraphics::D3DGraphics( HWND hWnd, int& winSizeX, int& winSizeY )
{
.
..
...
	sysBuffer = new D3DCOLOR[winSizeX * winSizeY]; // <--- problem solved!
}
.
..
...
void D3DGraphics::PutPixel( int x,int y,int r,int g,int b )
{	
	assert( x >= 0 );
	assert( y >= 0 );
	assert( x < windowSizeX );
	assert( y < windowSizeY );
	pSysBuffer[ x + windowSizeX * y ] = D3DCOLOR_XRGB( r,g,b );
}

void D3DGraphics::PutPixel( int x,int y,D3DCOLOR c )
{	
	assert( x >= 0 );
	assert( y >= 0 );
	assert( x < windowSizeX );
	assert( y < windowSizeY );
	pSysBuffer[ x + windowSizeX * y ] = c;
}

D3DCOLOR D3DGraphics::GetPixel( int x,int y)
{	
	assert( x >= 0 );
	assert( y >= 0 );
	assert( x < windowSizeX );
	assert( y < windowSizeY );
	return pSysBuffer[ x + windowSizeX * y ];
}

void D3DGraphics::BeginFrame()
{
	//HRESULT result;
	memset(pSysBuffer, 0x00, sizeof(D3DCOLOR) * windowSizeX *  windowSizeY); 
}

void D3DGraphics::EndFrame()
{
	HRESULT result;

	result = pBackBuffer->LockRect( &backRect,NULL,NULL );
	assert( !FAILED( result ) );

	for( int y = 0; y < windowSizeY; y++)
	{
		memcpy( &((BYTE*)backRect.pBits)[backRect.Pitch * y], &pSysBuffer[windowSizeX * y], sizeof( D3DCOLOR ) * windowSizeX);
	}
	result = pBackBuffer->UnlockRect();
	assert( !FAILED( result ) );

	result = pDevice->Present( NULL,NULL,NULL,NULL );
	assert( !FAILED( result ) );
}
.
..
...	

works like a charm .... thanks to you Chili .... without you ... i never would have understood the use of pointer and stuff.
i'm a selftauched programmer ... with electrical backgroun ... electrician : )

Like mentioned before ... i have some fair amount of c# knowlegde.
i tried c++ ... before : (

[NaturalDemon]

isn't it possible to redraw a scene wit new dimensions on a resize event in the frame buffer?

destroy the buffer and insert a resized one?

maybe it can't be done seamless.... but with a messagebox ..... usng th delay ... to reset the internal stuff ...

it's a bummer ... having a fixed screen size.

[chili]

You can do that fine. You'll need to reallocate the backbuffer and the system buffer if you have one. It's better to pause the game loop during resizing and then perform the reallocation at its conclusion instead of resizing while the user is still dragging.

[NaturalDemon]

I assume i can pause the game by method ..... if i correctly intercept the resize event.
that should be a too big hasle ....

in C# you have calbacks and .... it's a simle to add event ... by the properties panel.

// example

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while( msg.message != WM_QUIT )
    {
        if( PeekMessage( &msg,NULL,0,0,PM_REMOVE ) )
        {
            TranslateMessage( &msg );
            DispatchMessage( &msg );
        }
        else
		{
			if(!WM_RESIZE)
			{
			theGame.Go();
			}
			else
			{
				theGame.Go(pause);
			}
		}
    }

[chili]

You can do callbacks in c++ too, but you have the set up a lot of the infrastructure yourself.

I do like delegates and events in C#, it's a nice language. Too bad it's slow and bloated as balls.

[NaturalDemon]

slow

that's the keyword