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- //-----------------------------------------------------------------------------
- // File: GammaControl.cpp
- //
- // Desc: This sample demonstrates how to use DirectDraw full-screen mode
- // using the exclusive DirectDraw cooperative level.
- //
- // Copyright (c) 1999-2001 Microsoft Corporation. All rights reserved.
- //-----------------------------------------------------------------------------
- #define STRICT
- #include <windows.h>
- #include <ddraw.h>
- #include <mmsystem.h>
- #include "resource.h"
- #include "ddutil.h"
-
-
-
-
- //-----------------------------------------------------------------------------
- // Defines, constants, and global variables
- //-----------------------------------------------------------------------------
- #define SAFE_DELETE(p) { if(p) { delete (p); (p)=NULL; } }
- #define SAFE_RELEASE(p) { if(p) { (p)->Release(); (p)=NULL; } }
-
- #define SCREEN_WIDTH 640
- #define SCREEN_HEIGHT 480
- #define SCREEN_BPP 32
-
- #define NUM_COLOR_BARS 63
-
- #define HELPTEXT TEXT("Adjust the gamma level by clicking either mouse button. Press Escape to quit.")
- #define GAMMATEXT TEXT("Displaying with linear gamma ramp between 0 and %0.5d")
-
- CDisplay* g_pDisplay = NULL;
- CSurface* g_pLogoSurface = NULL;
- CSurface* g_pHelpTextSurface = NULL;
- CSurface* g_pGammaTextSurface = NULL;
- LPDIRECTDRAWGAMMACONTROL g_pGammaControl = NULL;
- BOOL g_bActive = FALSE;
- LONG g_lGammaRamp = 256;
-
-
-
-
- //-----------------------------------------------------------------------------
- // Function-prototypes
- //-----------------------------------------------------------------------------
- LRESULT CALLBACK MainWndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam );
- HRESULT WinInit( HINSTANCE hInst, int nCmdShow, HWND* phWnd, HACCEL* phAccel );
- HRESULT InitDirectDraw( HWND hWnd );
- VOID FreeDirectDraw();
- BOOL HasGammaSupport();
- HRESULT UpdateGammaRamp();
- HRESULT ProcessNextFrame();
- HRESULT DisplayFrame();
- HRESULT RestoreSurfaces();
- HRESULT DrawGammaText();
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: WinMain()
- // Desc: Entry point to the program. Initializes everything and calls
- // UpdateFrame() when idle from the message pump.
- //-----------------------------------------------------------------------------
- int APIENTRY WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR pCmdLine, int nCmdShow )
- {
- MSG msg;
- HWND hWnd;
- HACCEL hAccel;
- HRESULT hr;
-
- if( FAILED( WinInit( hInst, nCmdShow, &hWnd, &hAccel ) ) )
- return FALSE;
-
- if( FAILED( InitDirectDraw( hWnd ) ) )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("DirectDraw init failed. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
- return FALSE;
- }
-
- if( HasGammaSupport() == FALSE )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("The primary surface does not support gamma control. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
- return FALSE;
- }
-
- if( FAILED( hr = g_pDisplay->GetFrontBuffer()->QueryInterface( IID_IDirectDrawGammaControl,
- (LPVOID*) &g_pGammaControl ) ) )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("The primary surface does not support IDirectDrawGammaControl. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
- return FALSE;
- }
-
- while( TRUE )
- {
- // Look for messages, if none are found then
- // update the state and display it
- if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )
- {
- if( 0 == GetMessage(&msg, NULL, 0, 0 ) )
- {
- // WM_QUIT was posted, so exit
- return (int)msg.wParam;
- }
-
- // Translate and dispatch the message
- if( 0 == TranslateAccelerator( hWnd, hAccel, &msg ) )
- {
- TranslateMessage( &msg );
- DispatchMessage( &msg );
- }
- }
- else
- {
- if( g_bActive )
- {
- // Move the sprites, blt them to the back buffer, then
- // flip or blt the back buffer to the primary buffer
- if( FAILED( ProcessNextFrame() ) )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("Displaying the next frame failed. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
- return FALSE;
- }
- }
- else
- {
- // Make sure we go to sleep if we have nothing else to do
- WaitMessage();
- }
- }
- }
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: WinInit()
- // Desc: Init the window
- //-----------------------------------------------------------------------------
- HRESULT WinInit( HINSTANCE hInst, int nCmdShow, HWND* phWnd, HACCEL* phAccel )
- {
- WNDCLASS wc;
- HWND hWnd;
- HACCEL hAccel;
-
- // Register the Window Class
- wc.lpszClassName = TEXT("GammaControl");
- wc.lpfnWndProc = MainWndProc;
- wc.style = CS_VREDRAW | CS_HREDRAW;
- wc.hInstance = hInst;
- wc.hIcon = LoadIcon( hInst, MAKEINTRESOURCE(IDI_MAIN) );
- wc.hCursor = LoadCursor( NULL, IDC_ARROW );
- wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);
- wc.lpszMenuName = NULL;
- wc.cbClsExtra = 0;
- wc.cbWndExtra = 0;
-
- if( RegisterClass( &wc ) == 0 )
- return E_FAIL;
-
- // Load keyboard accelerators
- hAccel = LoadAccelerators( hInst, MAKEINTRESOURCE(IDR_MAIN_ACCEL) );
-
- // Create and show the main window
- hWnd = CreateWindowEx( 0, TEXT("GammaControl"), TEXT("DirectDraw GammaControl Sample"),
- WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, NULL );
- if( hWnd == NULL )
- return E_FAIL;
-
- ShowWindow( hWnd, nCmdShow );
- UpdateWindow( hWnd );
-
- *phWnd = hWnd;
- *phAccel = hAccel;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: InitDirectDraw()
- // Desc: Create the DirectDraw object, and init the surfaces
- //-----------------------------------------------------------------------------
- HRESULT InitDirectDraw( HWND hWnd )
- {
- HRESULT hr;
-
- g_pDisplay = new CDisplay();
- if( FAILED( hr = g_pDisplay->CreateFullScreenDisplay( hWnd, SCREEN_WIDTH,
- SCREEN_HEIGHT, SCREEN_BPP ) ) )
- {
- MessageBox( hWnd, TEXT("This display card does not support 640x480x8. "),
- TEXT("DirectDraw Sample"), MB_ICONERROR | MB_OK );
- return hr;
- }
-
- // Create a surface, and draw text to it.
- if( FAILED( hr = g_pDisplay->CreateSurfaceFromText( &g_pHelpTextSurface, NULL, HELPTEXT,
- RGB(0,0,0), RGB(255, 255, 0) ) ) )
- return hr;
-
- TCHAR strGammaText[256];
- wsprintf( strGammaText, GAMMATEXT, g_lGammaRamp * 256 );
-
- if( FAILED( hr = g_pDisplay->CreateSurfaceFromText( &g_pGammaTextSurface, NULL, strGammaText,
- RGB(0,0,0), RGB(255, 255, 0) ) ) )
- return hr;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: FreeDirectDraw()
- // Desc: Release all the DirectDraw objects
- //-----------------------------------------------------------------------------
- VOID FreeDirectDraw()
- {
- SAFE_DELETE( g_pHelpTextSurface );
- SAFE_DELETE( g_pGammaTextSurface );
- SAFE_DELETE( g_pDisplay );
- }
-
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: MainWndProc()
- // Desc: The main window procedure
- //-----------------------------------------------------------------------------
- LRESULT CALLBACK MainWndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
- {
- switch (msg)
- {
- case WM_LBUTTONDOWN:
- g_lGammaRamp -= 8;
- if( g_lGammaRamp < 0 )
- g_lGammaRamp = 0;
-
- if( FAILED( UpdateGammaRamp() ) )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("Failed setting the new gamma level. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
-
- PostQuitMessage( 0 );
- }
- break;
-
- case WM_RBUTTONDOWN:
- g_lGammaRamp += 8;
- if( g_lGammaRamp > 256 )
- g_lGammaRamp = 256;
-
- if( FAILED( UpdateGammaRamp() ) )
- {
- SAFE_DELETE( g_pDisplay );
-
- MessageBox( hWnd, TEXT("Failed setting the new gamma level. ")
- TEXT("The sample will now exit. "), TEXT("DirectDraw Sample"),
- MB_ICONERROR | MB_OK );
-
- PostQuitMessage( 0 );
- }
- break;
-
- case WM_COMMAND:
- switch( LOWORD(wParam) )
- {
- case IDM_EXIT:
- // Received key/menu command to exit app
- PostMessage( hWnd, WM_CLOSE, 0, 0 );
- return 0L;
- }
- break; // Continue with default processing
-
- case WM_SETCURSOR:
- // Hide the cursor in fullscreen
- SetCursor( NULL );
- return TRUE;
-
- case WM_SIZE:
- // Check to see if we are losing our window...
- if( SIZE_MAXHIDE==wParam || SIZE_MINIMIZED==wParam )
- g_bActive = FALSE;
- else
- g_bActive = TRUE;
- break;
-
- case WM_SYSCOMMAND:
- // Prevent moving/sizing and power loss in fullscreen mode
- switch( wParam )
- {
- case SC_MOVE:
- case SC_SIZE:
- case SC_MAXIMIZE:
- case SC_MONITORPOWER:
- return TRUE;
- }
- break;
-
- case WM_DESTROY:
- // Cleanup and close the app
- FreeDirectDraw();
- PostQuitMessage( 0 );
- return 0L;
- }
-
- return DefWindowProc(hWnd, msg, wParam, lParam);
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: HasGammaSupport()
- // Desc: Returns TRUE if the device supports gamma control, FALSE otherwise
- //-----------------------------------------------------------------------------
- BOOL HasGammaSupport()
- {
- // Get driver capabilities to determine gamma support.
- DDCAPS ddcaps;
- ZeroMemory( &ddcaps, sizeof(ddcaps) );
- ddcaps.dwSize = sizeof(ddcaps);
-
- g_pDisplay->GetDirectDraw()->GetCaps( &ddcaps, NULL );
-
- // Does the driver support gamma?
- // The DirectDraw emulation layer does not support overlays
- // so gamma related APIs will fail without hardware support.
- if( ddcaps.dwCaps2 & DDCAPS2_PRIMARYGAMMA )
- return TRUE;
- else
- return FALSE;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: UpdateGammaRamp()
- // Desc:
- //-----------------------------------------------------------------------------
- HRESULT UpdateGammaRamp()
- {
- HRESULT hr;
- DDGAMMARAMP ddgr;
- WORD dwGamma;
-
- ZeroMemory( &ddgr, sizeof(ddgr) );
-
- if( FAILED( hr = g_pGammaControl->GetGammaRamp( 0, &ddgr ) ) )
- return hr;
-
- dwGamma = 0;
-
- for( int iColor = 0; iColor < 256; iColor++ )
- {
- ddgr.red[iColor] = dwGamma;
- ddgr.green[iColor] = dwGamma;
- ddgr.blue[iColor] = dwGamma;
-
- dwGamma += (WORD) g_lGammaRamp;
- }
-
- if( FAILED( hr = g_pGammaControl->SetGammaRamp( 0, &ddgr ) ) )
- return hr;
-
- if( FAILED( hr = DrawGammaText() ) )
- return hr;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: ProcessNextFrame()
- // Desc: Move the sprites, blt them to the back buffer, then
- // flips the back buffer to the primary buffer
- //-----------------------------------------------------------------------------
- HRESULT ProcessNextFrame()
- {
- HRESULT hr;
-
- // Display the sprites on the screen
- if( FAILED( hr = DisplayFrame() ) )
- {
- if( hr != DDERR_SURFACELOST )
- return hr;
-
- // The surfaces were lost so restore them
- RestoreSurfaces();
- }
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DisplayFrame()
- // Desc: Blts a the color bars to the back buffer, then flips the
- // back buffer onto the primary buffer.
- //-----------------------------------------------------------------------------
- HRESULT DisplayFrame()
- {
- DDSURFACEDESC2 ddsd;
- HRESULT hr;
- DDBLTFX ddbltfx;
- RECT rctDest;
- DWORD dwRShift;
- DWORD dwGShift;
- DWORD dwBShift;
- DWORD dwRColorLevels;
- DWORD dwGColorLevels;
- DWORD dwBColorLevels;
- DWORD dwBits;
- DWORD dwColor;
- LPDIRECTDRAWSURFACE7 pFrontBuffer;
- LPDIRECTDRAWSURFACE7 pBackBuffer;
-
- pFrontBuffer = g_pDisplay->GetFrontBuffer();
- pBackBuffer = g_pDisplay->GetBackBuffer();
-
- ZeroMemory( &ddsd,sizeof(ddsd) );
- ddsd.dwSize = sizeof(ddsd);
- if( FAILED( hr = pFrontBuffer->GetSurfaceDesc( &ddsd ) ) )
- return hr;
-
- // Fill the back buffer with black, ignoring errors until the flip
- g_pDisplay->Clear(0);
-
- CSurface::GetBitMaskInfo( ddsd.ddpfPixelFormat.dwRBitMask, &dwRShift, &dwBits );
- CSurface::GetBitMaskInfo( ddsd.ddpfPixelFormat.dwGBitMask, &dwGShift, &dwBits );
- CSurface::GetBitMaskInfo( ddsd.ddpfPixelFormat.dwBBitMask, &dwBShift, &dwBits );
-
- dwRColorLevels = ddsd.ddpfPixelFormat.dwRBitMask >> dwRShift;
- dwGColorLevels = ddsd.ddpfPixelFormat.dwGBitMask >> dwGShift;
- dwBColorLevels = ddsd.ddpfPixelFormat.dwBBitMask >> dwBShift;
-
- ZeroMemory( &ddbltfx, sizeof(ddbltfx) );
- ddbltfx.dwSize = sizeof(ddbltfx);
-
- for( DWORD i = 0; i <= NUM_COLOR_BARS; i++ )
- {
- rctDest.left = SCREEN_WIDTH / (NUM_COLOR_BARS + 1) * (i + 0);
- rctDest.right = SCREEN_WIDTH / (NUM_COLOR_BARS + 1) * (i + 1);
-
- // Figure out the color for the red color bar
- dwColor = (DWORD) ( dwRColorLevels * i / (float) NUM_COLOR_BARS );
- ddbltfx.dwFillColor = dwColor << dwRShift;
-
- rctDest.top = SCREEN_HEIGHT / 3 * 0;
- rctDest.bottom = SCREEN_HEIGHT / 3 * 1;
- pBackBuffer->Blt( &rctDest, NULL, NULL,
- DDBLT_COLORFILL | DDBLT_WAIT,
- &ddbltfx );
-
- // Figure out the color for the green color bar
- dwColor = (DWORD) ( dwGColorLevels * i / (float) NUM_COLOR_BARS );
- ddbltfx.dwFillColor = dwColor << dwGShift;
-
- rctDest.top = SCREEN_HEIGHT / 3 * 1;
- rctDest.bottom = SCREEN_HEIGHT / 3 * 2;
- pBackBuffer->Blt( &rctDest, NULL, NULL,
- DDBLT_COLORFILL | DDBLT_WAIT,
- &ddbltfx );
-
- // Figure out the color for the blue color bar
- dwColor = (DWORD) ( dwBColorLevels * i / (float) NUM_COLOR_BARS );
- ddbltfx.dwFillColor = dwColor << dwBShift;
-
- rctDest.top = SCREEN_HEIGHT / 3 * 2;
- rctDest.bottom = SCREEN_HEIGHT / 3 * 3;
- pBackBuffer->Blt( &rctDest, NULL, NULL,
- DDBLT_COLORFILL | DDBLT_WAIT,
- &ddbltfx );
-
- }
-
- // Blt the help text on the backbuffer, ignoring errors until the flip
- g_pDisplay->Blt( 10, 10, g_pHelpTextSurface, NULL );
-
- g_pDisplay->Blt( 10, 30, g_pGammaTextSurface, NULL );
-
- // We are in fullscreen mode, so perform a flip and return
- // any errors like DDERR_SURFACELOST
- if( FAILED( hr = g_pDisplay->Present() ) )
- return hr;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: RestoreSurfaces()
- // Desc: Restore all the surfaces, and redraw the sprite surfaces.
- //-----------------------------------------------------------------------------
- HRESULT RestoreSurfaces()
- {
- HRESULT hr;
-
- if( FAILED( hr = g_pDisplay->GetDirectDraw()->RestoreAllSurfaces() ) )
- return hr;
-
- // No need to re-create the surface, just re-draw it.
- if( FAILED( hr = g_pHelpTextSurface->DrawText( NULL, HELPTEXT,
- 0, 0, RGB(0,0,0), RGB(255, 255, 0) ) ) )
- return hr;
-
- DrawGammaText();
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DrawGammaText()
- // Desc:
- //-----------------------------------------------------------------------------
- HRESULT DrawGammaText()
- {
- HRESULT hr;
- TCHAR strGammaText[256];
-
- wsprintf( strGammaText, GAMMATEXT, g_lGammaRamp * 256 );
-
- if( FAILED( hr = g_pGammaTextSurface->DrawText( NULL, strGammaText,
- 0, 0, RGB(0,0,0), RGB(255, 255, 0) ) ) )
- return hr;
-
- return S_OK;
- }
-
-
-
-
-