- fallback to non-sRGB visuals if the context creation failed (GLX-only)
[freeglut] / src / mswin / fg_state_mswin.c
index 9df5211..98468f5 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * freeglut_state_mswin.c
+ * fg_state_mswin.c
  *
  * The Windows-specific state query methods.
  *
 extern GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
                                      unsigned char layer_type );
 
-/* 
+/*
  * Helper functions for getting client area from the window rect
  * and the window rect from the client area given the style of the window
  * (or a valid window pointer from which the style can be queried).
  */
-extern void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL wantPosOutside );
+extern void fghGetClientArea( RECT *clientRect, const SFG_Window *window, BOOL posIsOutside );
 extern void fghGetStyleFromWindow( const SFG_Window *window, DWORD *windowStyle, DWORD *windowExStyle );
 extern void fghComputeWindowRectFromClientArea_UseStyle( RECT *clientRect, const DWORD windowStyle, const DWORD windowExStyle, BOOL posIsOutside );
 
@@ -46,7 +46,14 @@ extern void fghComputeWindowRectFromClientArea_UseStyle( RECT *clientRect, const
  *   #include <GL/wglext.h>
  * So we copy the necessary parts out of it to support the multisampling query
  */
+#ifndef WGL_SAMPLES_ARB
 #define WGL_SAMPLES_ARB                0x2042
+#endif
+#ifndef WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
+#endif
+
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
 
 #if defined(_WIN32_WCE)
 #   include <Aygshell.h>
@@ -141,29 +148,27 @@ int fgPlatformGlutGet ( GLenum eWhat )
       return returnValue;
 
     case GLUT_WINDOW_BUFFER_SIZE:
-      returnValue = 1 ;                                      /* TODO????? */
-      return returnValue;
+    {
+        PIXELFORMATDESCRIPTOR  pfd;
+        HDC hdc = fgStructure.CurrentWindow->Window.pContext.Device;
+        int iPixelFormat = GetPixelFormat( hdc );
+        DescribePixelFormat(hdc, iPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+
+        returnValue = pfd.cColorBits;
+        if (pfd.iPixelType==PFD_TYPE_RGBA)
+            returnValue += pfd.cAlphaBits;
+
+        return returnValue;
+    }
     case GLUT_WINDOW_STENCIL_SIZE:
-      returnValue = 0 ;                                      /* TODO????? */
+      glGetIntegerv ( GL_STENCIL_BITS, &returnValue );
       return returnValue;
 
     case GLUT_WINDOW_X:
     case GLUT_WINDOW_Y:
-    case GLUT_WINDOW_WIDTH:
-    case GLUT_WINDOW_HEIGHT:
     {
         /*
-         *  There is considerable confusion about the "right thing to
-         *  do" concerning window  size and position.  GLUT itself is
-         *  not consistent between Windows and UNIX/X11; since
-         *  platform independence is a virtue for "freeglut", we
-         *  decided to break with GLUT's behaviour.
-         *
-         *  Under UNIX/X11, it is apparently not possible to get the
-         *  window border sizes in order to subtract them off the
-         *  window's initial position until some time after the window
-         *  has been created.  Therefore we decided on the following
-         *  behaviour, both under Windows and under UNIX/X11:
+         *  NB:
          *  - When you create a window with position (x,y) and size
          *    (w,h), the upper left hand corner of the outside of the
          *    window is at (x,y) and the size of the drawable area is
@@ -172,39 +177,50 @@ int fgPlatformGlutGet ( GLenum eWhat )
          *    is happening here for Windows--"freeglut" will return
          *    the size of the drawable area--the (w,h) that you
          *    specified when you created the window--and the coordinates
-         *    of the upper left hand corner of the drawable
-         *    area--which is NOT the (x,y) you specified.
+         *    of the upper left hand corner of the drawable area, i.e.
+         *    of the client rect--which is NOT the (x,y) you specified.
          */
 
         RECT winRect;
+        POINT topLeft = {0,0};
 
         freeglut_return_val_if_fail( fgStructure.CurrentWindow != NULL, 0 );
 
 #if defined(_WIN32_WCE)
-        GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
+        GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect);
 #else
-        fghGetClientArea(&winRect,fgStructure.CurrentWindow, FALSE);
-        if (fgStructure.CurrentWindow->Parent && (eWhat==GLUT_WINDOW_X || eWhat==GLUT_WINDOW_Y))
-        {
+        ClientToScreen(fgStructure.CurrentWindow->Window.Handle, &topLeft);
+
+        if (fgStructure.CurrentWindow->Parent)
             /* For child window, we should return relative to upper-left
-             *  of parent's client area.
+             * of parent's client area.
              */
-            POINT topleft;
-            topleft.x = winRect.left;
-            topleft.y = winRect.top;
+            ScreenToClient(fgStructure.CurrentWindow->Parent->Window.Handle,&topLeft);
 
-            ScreenToClient(fgStructure.CurrentWindow->Parent->Window.Handle,&topleft);
-            winRect.left = topleft.x;
-            winRect.top  = topleft.y;
-        }
+        winRect.left = topLeft.x;
+        winRect.top  = topLeft.y;
 #endif /* defined(_WIN32_WCE) */
 
         switch( eWhat )
         {
-        case GLUT_WINDOW_X:      return winRect.left                ;
-        case GLUT_WINDOW_Y:      return winRect.top                 ;
-        case GLUT_WINDOW_WIDTH:  return winRect.right - winRect.left;
-        case GLUT_WINDOW_HEIGHT: return winRect.bottom - winRect.top;
+        case GLUT_WINDOW_X:      return winRect.left;
+        case GLUT_WINDOW_Y:      return winRect.top ;
+        }
+    }
+    break;
+
+    case GLUT_WINDOW_WIDTH:
+    case GLUT_WINDOW_HEIGHT:
+    {
+        RECT winRect;
+        freeglut_return_val_if_fail( fgStructure.CurrentWindow != NULL, 0 );
+
+        GetClientRect( fgStructure.CurrentWindow->Window.Handle, &winRect);
+
+        switch( eWhat )
+        {
+        case GLUT_WINDOW_WIDTH:      return winRect.right-winRect.left;
+        case GLUT_WINDOW_HEIGHT:     return winRect.bottom-winRect.top;
         }
     }
     break;
@@ -226,15 +242,19 @@ int fgPlatformGlutGet ( GLenum eWhat )
 
             /* Get style of window, or default style */
             fghGetStyleFromWindow( fgStructure.CurrentWindow, &windowStyle, &windowExStyle );
-            /* Get client area if any window */
+            /* Get client area if we have a current window, else use dummy rect */
+            /* Also get window rect (including non-client area) */
             if (fgStructure.CurrentWindow && fgStructure.CurrentWindow->Window.Handle)
-                fghGetClientArea(&clientRect,fgStructure.CurrentWindow,FALSE);
+            {
+                fghGetClientArea(&clientRect,fgStructure.CurrentWindow, FALSE);
+                GetWindowRect(fgStructure.CurrentWindow->Window.Handle,&winRect);
+            }
             else
+            {
                 SetRect(&clientRect,0,0,200,200);
-
-            /* Compute window rect (including non-client area) */
-            CopyRect(&winRect,&clientRect);
-            fghComputeWindowRectFromClientArea_UseStyle(&winRect,windowStyle,windowExStyle,FALSE);
+                CopyRect(&winRect,&clientRect);
+                fghComputeWindowRectFromClientArea_UseStyle(&winRect,windowStyle,windowExStyle,FALSE);
+            }
 
             /* Calculate border width by taking width of whole window minus width of client area and divide by two
              * NB: we assume horizontal and vertical borders have the same size, which should always be the case
@@ -243,8 +263,8 @@ int fgPlatformGlutGet ( GLenum eWhat )
              * all other extra pixels are assumed to be atop the window, forming the caption.
              */
             borderWidth   = ((winRect.right-winRect.left)-(clientRect.right-clientRect.left))/2;
-            captionHeight = (winRect.bottom-winRect.top)-(clientRect.bottom-clientRect.top)-borderWidth*2;
-            
+            captionHeight = (winRect.bottom-winRect.top)-(clientRect.bottom-clientRect.top)-borderWidth; /* include top border in caption height */
+
             switch( eWhat )
             {
             case GLUT_WINDOW_BORDER_WIDTH:
@@ -271,12 +291,31 @@ int fgPlatformGlutGet ( GLenum eWhat )
 #endif /* defined(_WIN32_WCE) */
         return 0;
 
+    case GLUT_WINDOW_SRGB:
+        if( fgStructure.CurrentWindow != NULL ) {
+            static int attr = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
+            static PFNWGLGETPIXELFORMATATTRIBIVARBPROC wglGetPixelFormatAttribivARB;
+            HDC hdc = fgStructure.CurrentWindow->Window.pContext.Device;
+            int ipixfmt = GetPixelFormat(hdc);
+            int val;
+
+            if(!wglGetPixelFormatAttribivARB) {
+                if(!(wglGetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)wglGetProcAddress("wglGetPixelFormatAttribivARB"))) {
+                    return 0;
+                }
+            }
+            if(wglGetPixelFormatAttribivARB(hdc, ipixfmt, 0, 1, &attr, &val)) {
+                return val;
+            }
+        }
+        return 0;
+
     default:
         fgWarning( "glutGet(): missing enum handle %d", eWhat );
         break;
     }
 
-       return -1;
+    return -1;
 }
 
 
@@ -314,11 +353,9 @@ int fgPlatformGlutDeviceGet ( GLenum eWhat )
 
     default:
         fgWarning( "glutDeviceGet(): missing enum handle %d", eWhat );
+        return -1;
         break;
     }
-
-    /* And now -- the failure. */
-    return -1;
 }
 
 /*
@@ -334,4 +371,4 @@ int *fgPlatformGlutGetModeValues(GLenum eWhat, int *size)
 {
   *size = 0;
   return NULL;
-}
\ No newline at end of file
+}