From: John F. Fay Date: Thu, 21 Sep 2006 18:59:37 +0000 (+0000) Subject: Adding multisampling to *nix and Windows; also some other pixel format enhancements... X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=commitdiff_plain;h=dbf924cc8664bbce41704d2af2df68627f2eab54;p=freeglut Adding multisampling to *nix and Windows; also some other pixel format enhancements to Windows git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@700 7f0cb862-5218-0410-a997-914c9d46530a --- diff --git a/ChangeLog b/ChangeLog index ba1576f..12bcbf3 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1204,3 +1204,6 @@ definitions Also added a prompt for user input to highlight a difference betwen GLUT and "freeglut" +(312) Added multisampling support for *nix and Windows; some other pixel +format changes for Windows + diff --git a/src/freeglut_window.c b/src/freeglut_window.c index 9939e50..58e95f4 100644 --- a/src/freeglut_window.c +++ b/src/freeglut_window.c @@ -135,6 +135,8 @@ XVisualInfo* fgChooseVisual( void ) ATTRIB_VAL( GLX_AUX_BUFFERS, 3 ); if( fgState.DisplayMode & GLUT_AUX4 ) ATTRIB_VAL( GLX_AUX_BUFFERS, 4 ); + if ( fgState.DisplayMode & GLUT_MULTISAMPLE ) + ATTRIB_VAL( GLX_SAMPLES_SGIS, 4 ); /* Push a null at the end of the list */ @@ -170,10 +172,33 @@ XVisualInfo* fgChooseVisual( void ) * Setup the pixel format for a Win32 window */ #if TARGET_HOST_MS_WINDOWS +/* WRONG-- FIXME */ +/* The following include file is available from SGI but is not standard: + * #include + * So we copy the necessary parts out of it. + */ +typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc); + +typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats); + +#define WGL_DRAW_TO_WINDOW_ARB 0x2001 +#define WGL_ACCELERATION_ARB 0x2003 +#define WGL_SUPPORT_OPENGL_ARB 0x2010 +#define WGL_DOUBLE_BUFFER_ARB 0x2011 +#define WGL_COLOR_BITS_ARB 0x2014 +#define WGL_ALPHA_BITS_ARB 0x201B +#define WGL_DEPTH_BITS_ARB 0x2022 +#define WGL_STENCIL_BITS_ARB 0x2023 +#define WGL_FULL_ACCELERATION_ARB 0x2027 + +#define WGL_SAMPLE_BUFFERS_ARB 0x2041 +#define WGL_SAMPLES_ARB 0x2042 + + GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly, unsigned char layer_type ) { -#ifdef _WIN32_WCE +#if defined(_WIN32_WCE) return GL_TRUE; #else PIXELFORMATDESCRIPTOR* ppfd, pfd; @@ -195,15 +220,31 @@ GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly, pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR); pfd.nVersion = 1; pfd.dwFlags = flags; - pfd.iPixelType = PFD_TYPE_RGBA; + + if( fgState.DisplayMode & GLUT_INDEX ) + { + pfd.iPixelType = PFD_TYPE_COLORINDEX; + pfd.cRedBits = 0; + pfd.cGreenBits = 0; + pfd.cBlueBits = 0; + pfd.cAlphaBits = 0; + } + else + { + pfd.iPixelType = PFD_TYPE_RGBA; + pfd.cRedBits = 8; + pfd.cGreenBits = 8; + pfd.cBlueBits = 8; + if ( fgState.DisplayMode & GLUT_ALPHA ) + pfd.cAlphaBits = 8; + else + pfd.cAlphaBits = 0; + } + pfd.cColorBits = 24; - pfd.cRedBits = 0; pfd.cRedShift = 0; - pfd.cGreenBits = 0; pfd.cGreenShift = 0; - pfd.cBlueBits = 0; pfd.cBlueShift = 0; - pfd.cAlphaBits = 0; pfd.cAlphaShift = 0; pfd.cAccumBits = 0; pfd.cAccumRedBits = 0; @@ -238,6 +279,80 @@ GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly, ppfd = &pfd; pixelformat = ChoosePixelFormat( window->Window.Device, ppfd ); + + /* windows hack for multismapling */ + if (fgState.DisplayMode&GLUT_MULTISAMPLE) + { + PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB=NULL; + HGLRC rc, rc_before=wglGetCurrentContext(); + HWND hWnd; + HDC hDC, hDC_before=wglGetCurrentDC(); + WNDCLASS wndCls; + ATOM atom; + + /* create a dummy window */ + ZeroMemory(&wndCls, sizeof(wndCls)); + wndCls.lpfnWndProc = DefWindowProc; + wndCls.hInstance = fgDisplay.Instance; + wndCls.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW; + wndCls.lpszClassName = _T("FREEGLUT_dummy"); + atom = RegisterClass( &wndCls ); + + hWnd=CreateWindow((LPCSTR)atom, _T(""), WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW , 0,0,0,0, 0, 0, fgDisplay.Instance, 0 ); + hDC=GetDC(hWnd); + SetPixelFormat( hDC, pixelformat, ppfd ); + + rc = wglCreateContext( hDC ); + wglMakeCurrent(hDC, rc); + + wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB"); + if (wglGetEntensionsStringARB) + { + const char * pWglExtString=wglGetEntensionsStringARB(hDC); + if (pWglExtString) + { + if (strstr(pWglExtString, "WGL_ARB_multisample")) + { + int pAttributes[100]; + int iCounter=0; + int iPixelFormat; + BOOL bValid; + float fAttributes[] = {0,0}; + UINT numFormats; + PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARBProc=NULL; + + wglChoosePixelFormatARBProc=(PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB"); + if ( wglChoosePixelFormatARBProc ) + { + pAttributes[iCounter++]=WGL_DRAW_TO_WINDOW_ARB; pAttributes[iCounter++]=GL_TRUE; + pAttributes[iCounter++]=WGL_SUPPORT_OPENGL_ARB; pAttributes[iCounter++]=GL_TRUE; + pAttributes[iCounter++]=WGL_ACCELERATION_ARB; pAttributes[iCounter++]=WGL_FULL_ACCELERATION_ARB; + + pAttributes[iCounter++]=WGL_COLOR_BITS_ARB; pAttributes[iCounter++]=pfd.cColorBits ; + pAttributes[iCounter++]=WGL_ALPHA_BITS_ARB; pAttributes[iCounter++]=pfd.cAlphaBits; + pAttributes[iCounter++]=WGL_DEPTH_BITS_ARB; pAttributes[iCounter++]=pfd.cDepthBits; + pAttributes[iCounter++]=WGL_STENCIL_BITS_ARB; pAttributes[iCounter++]=pfd.cStencilBits; + + pAttributes[iCounter++]=WGL_DOUBLE_BUFFER_ARB; pAttributes[iCounter++]=(fgState.DisplayMode & GLUT_DOUBLE)!=0; + pAttributes[iCounter++]=WGL_SAMPLE_BUFFERS_ARB; pAttributes[iCounter++]=GL_TRUE; + pAttributes[iCounter++]=WGL_SAMPLES_ARB; pAttributes[iCounter++]=4; + pAttributes[iCounter++]=0; pAttributes[iCounter++]=0; /* terminator */ + + bValid = wglChoosePixelFormatARBProc(window->Window.Device,pAttributes,fAttributes,1,&iPixelFormat,&numFormats); + + if (bValid && numFormats>0) + pixelformat=iPixelFormat; + } + } + wglMakeCurrent( hDC_before, rc_before); + wglDeleteContext(rc); + ReleaseDC(hWnd, hDC); + DestroyWindow(hWnd); + UnregisterClass(_T("FREEGLUT_dummy"), fgDisplay.Instance); + } + } + } + if( pixelformat == 0 ) return GL_FALSE;