Changeset 245 for trunk/src/lib/gl.cc

Timestamp:

05/27/14 16:26:53 (11 years ago)

Author:

epyon

Message:

• gl library wgl support
• gl context and window adoption

File:

• trunk/src/lib/gl.cc (modified) (2 diffs)

trunk/src/lib/gl.cc

@@ -16 +16 @@
 #endif
 
-#define NV_GL_FUN( rtype, fname, fparams ) rtype (NV_GL_APIENTRY *fname) fparams = nullptr;
+// for wgl support
+#if NV_PLATFORM == NV_WINDOWS
+#    ifndef WIN32_LEAN_AND_MEAN
+#      define WIN32_LEAN_AND_MEAN 1
+#    endif
+#include <windows.h>
+#    undef WIN32_LEAN_AND_MEAN
+#endif
+
+// extern added for wgl needs only!
+#define NV_GL_FUN( rtype, fname, fparams ) extern "C" rtype (NV_GL_APIENTRY *fname) fparams = nullptr;
+#define NV_GL_FUN_REN( rtype, fname, rname, fparams ) extern "C" rtype (NV_GL_APIENTRY *rname) fparams = nullptr;
 #define NV_GL_FUN_EXT NV_GL_FUN
 #include <nv/lib/detail/gl_functions.inc>
+#if NV_PLATFORM == NV_WINDOWS
+#include <nv/lib/detail/wgl_functions.inc>
+#endif
+#undef NV_GL_FUN_REN
 #undef NV_GL_FUN_EXT
 #undef NV_GL_FUN
 
+static nv::library gl_library;
+static bool gl_library_loaded = false;
+static bool wgl_library_loaded = false;
+
 bool nv::load_gl_library( const char* path )
 {
+        if ( gl_library_loaded ) return true;
 #if defined( NV_SDL_GL )
 #               define NV_GL_LOAD( symbol ) *(void **) (&symbol) = SDL_GL_GetProcAddress(#symbol);
 #               define NV_GL_LOAD_EXT( symbol ) *(void **) (&symbol) = SDL_GL_GetProcAddress(#symbol);
 #else
-        static nv::library gl_library;
-        if ( gl_library.is_open() ) return true;
-        gl_library.open( path );
+        if ( !gl_library.is_open() ) gl_library.open( path );
 
         void * (NV_GL_APIENTRY *ext_loader) (const char* proc) = nullptr;
@@ -55 +73 @@
 #       undef NV_GL_LOAD
 #       undef NV_GL_LOAD_EXT
+        gl_library_loaded = true;
         return true;
 }
 
+bool nv::load_wgl_library( const char* path /*= NV_GL_PATH */ )
+{
+        if ( wgl_library_loaded ) return true;
+#if NV_PLATFORM == NV_WINDOWS 
+#if defined( NV_SDL_GL )
+#               define NV_GL_LOAD( symbol ) *(void **) (&symbol) = SDL_GL_GetProcAddress(#symbol);
+#               define NV_GL_LOAD_EXT( symbol ) *(void **) (&symbol) = SDL_GL_GetProcAddress(#symbol);
+#           define NV_GL_LOAD_REN( fname, rname )  *(void **) (&rname) = SDL_GL_GetProcAddress(#fname);
+#else // 
+        if ( !gl_library.is_open() ) gl_library.open( path );
+
+        void * (NV_GL_APIENTRY *ext_loader) (const char* proc) = nullptr;
+        *(void **) (&ext_loader) = gl_library.get("wglGetProcAddress");
+#define NV_GL_LOAD( symbol ) *(void **) (&symbol) = gl_library.get(#symbol);
+#define NV_GL_LOAD_EXT( symbol ) *(void **) (&symbol) = ext_loader(#symbol);
+#define NV_GL_LOAD_REN( fname, rname ) *(void **) (&rname) = gl_library.get(#fname);
+#endif 
+#       define NV_GL_FUN( rtype, fname, fparams ) NV_GL_LOAD( fname )
+#       define NV_GL_FUN_EXT( rtype, fname, fparams ) NV_GL_LOAD_EXT( fname )
+#       define NV_GL_FUN_REN( rtype, fname, rname, fparams ) NV_GL_LOAD_REN( fname, rname )
+#       include <nv/lib/detail/wgl_functions.inc>
+#       undef NV_GL_FUN_REN
+#       undef NV_GL_FUN_EXT
+#       undef NV_GL_FUN
+
+#       undef NV_GL_LOAD
+#       undef NV_GL_LOAD_EXT
+#       undef NV_GL_LOAD_REN
+        wgl_library_loaded = true;
+        return true;
+#else
+        return false;
 #endif
+}
+
+#endif // NV_DYNAMIC
+
+bool nv::load_gl_no_context( const char* path /*= NV_GL_PATH */ )
+{
+#if NV_PLATFORM == NV_WINDOWS 
+        if ( !gl_library.is_open() ) gl_library.open( path );
+        if ( wgl_library_loaded ) return true;
+
+        HGLRC (NV_GL_APIENTRY *wgl_createcontext) (HDC)        = nullptr;
+        BOOL  (NV_GL_APIENTRY *wgl_makecurrent)   (HDC, HGLRC) = nullptr;
+        BOOL  (NV_GL_APIENTRY *wgl_deletecontext) (HGLRC)      = nullptr;
+
+        *(void **) &wgl_createcontext = gl_library.get("wglCreateContext");
+        *(void **) &wgl_makecurrent   = gl_library.get("wglMakeCurrent");
+        *(void **) &wgl_deletecontext = gl_library.get("wglDeleteContext");
+
+        WNDCLASS wndClass;
+        HINSTANCE hInstance = 0;
+
+        ZeroMemory(&wndClass, sizeof(WNDCLASS));
+
+        wndClass.cbClsExtra = 0;
+        wndClass.cbWndExtra = 0;                        
+        wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
+        wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+        wndClass.hInstance = hInstance;
+        wndClass.lpfnWndProc = (WNDPROC) DefWindowProc;
+        wndClass.lpszClassName = TEXT("Dummy67789");
+        wndClass.lpszMenuName = 0;
+        wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+
+        DWORD err = GetLastError();
+        RegisterClass(&wndClass);
+        err = GetLastError();
+
+
+        HWND hWndFake = CreateWindow(TEXT("Dummy67789"), "FAKE", WS_OVERLAPPEDWINDOW | WS_MAXIMIZE | WS_CLIPCHILDREN, 
+                0, 0, CW_USEDEFAULT, CW_USEDEFAULT, NULL, 
+                NULL, GetModuleHandle(nullptr), NULL); 
+
+        HDC hDC = GetDC(hWndFake); 
+
+        PIXELFORMATDESCRIPTOR pfd; 
+        memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR)); 
+        pfd.nSize= sizeof(PIXELFORMATDESCRIPTOR); 
+        pfd.nVersion   = 1; 
+        pfd.dwFlags    = PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW; 
+        pfd.iPixelType = PFD_TYPE_RGBA; 
+        pfd.cColorBits = 32; 
+        pfd.cDepthBits = 24; 
+        pfd.iLayerType = PFD_MAIN_PLANE; 
+
+        int iPixelFormat = ChoosePixelFormat(hDC, &pfd); 
+        if (iPixelFormat == 0)return false; 
+
+        if(!SetPixelFormat(hDC, iPixelFormat, &pfd))return false; 
+
+        HGLRC hRCFake = wgl_createcontext(hDC); 
+        wgl_makecurrent(hDC, hRCFake); 
+
+        LoadLibrary( "gdi32.dll" );
+        bool gl_loaded = nv::load_gl_library( path );
+        bool wgl_loaded = nv::load_wgl_library( path );
+        bool result = gl_loaded && wgl_loaded;
+
+        wgl_makecurrent(NULL, NULL); 
+        wgl_deletecontext(hRCFake); 
+        DestroyWindow(hWndFake); 
+        return result;
+#else
+        return false;
+#endif
+}
+