Added 8-bit palette for OpenGL (3:3:2 RGB). This should fix all of the

OpenGL colormap problems...


git-svn-id: file:///fltk/svn/fltk/trunk@73 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_Gl_Window.cxx

@@ -1,5 +1,5 @@
 //
-// "$Id: Fl_Gl_Window.cxx,v 1.7 1998/10/21 14:20:06 mike Exp $"
+// "$Id: Fl_Gl_Window.cxx,v 1.8 1998/11/08 15:55:22 mike Exp $"
 //
 // OpenGL window code for the Fast Light Tool Kit (FLTK).
 //
@@ -59,6 +59,14 @@
 #define SWAP_TYPE SWAP
 #endif
 
+//
+// Windows may need a different color palette...
+//
+
+#if defined(WIN32) && HAVE_GL
+extern HPALETTE fl_gl_palette;
+#endif
+
 ////////////////////////////////////////////////////////////////
 
 int Fl_Gl_Window::can_do(int a, const int *b) {
@@ -123,6 +131,7 @@ int Fl_Gl_Window::mode(int m, const int *a) {
 void Fl_Gl_Window::make_current() {
 #ifdef WIN32
   HDC hdc = fl_private_dc(this, mode_,&g);
+
   if (!context) {
     context = wglCreateContext(hdc);
     if (fl_first_context) wglShareLists(fl_first_context, (GLXContext)context);
@@ -138,6 +147,14 @@ void Fl_Gl_Window::make_current() {
   }
   glXMakeCurrent(fl_display, fl_xid(this), (GLXContext)context);
 #endif
+
+#  if USE_COLORMAP
+  if (fl_gl_palette) {
+    SelectPalette(fl_gc, fl_gl_palette, FALSE);
+    RealizePalette(fl_gc);
+  }
+#  endif // USE_COLORMAP
+
   glDrawBuffer(GL_BACK);
 }
 
@@ -310,5 +327,5 @@ void Fl_Gl_Window::draw_overlay() {}
 #endif
 
 //
-// End of "$Id: Fl_Gl_Window.cxx,v 1.7 1998/10/21 14:20:06 mike Exp $".
+// End of "$Id: Fl_Gl_Window.cxx,v 1.8 1998/11/08 15:55:22 mike Exp $".
 //

src/fl_color_win32.cxx

@@ -1,5 +1,5 @@
 //
-// "$Id: fl_color_win32.cxx,v 1.3 1998/10/21 14:20:45 mike Exp $"
+// "$Id: fl_color_win32.cxx,v 1.4 1998/11/08 15:55:23 mike Exp $"
 //
 // WIN32 color functions for the Fast Light Tool Kit (FLTK).
 //
@@ -47,6 +47,9 @@ Fl_XMap fl_xmap[256];
 Fl_XMap* fl_current_xmap;
 
 HPALETTE fl_palette;
+#if HAVE_GL
+HPALETTE fl_gl_palette;
+#endif // HAVE_GL
 
 static void clear_xmap(Fl_XMap& xmap) {
   if (xmap.pen) {
@@ -214,6 +217,21 @@ fl_select_palette(void)
 
     // Create the palette:
     fl_palette = CreatePalette(pPal);
+
+#if HAVE_GL
+    // Now do the OpenGL palette...  Any 8-bit display will want 3:3:2 RGB,
+    // and doing OpenGL on anything less than 8-bits is just asking for
+    // disappointment!
+
+    for (int i = 0; i < nColors; i ++) {
+      pPal->palPalEntry[i].peRed   = 255 * ((i >> 5) & 7) / 7;
+      pPal->palPalEntry[i].peGreen = 255 * ((i >> 2) & 7) / 7;
+      pPal->palPalEntry[i].peBlue  = 255 * (i & 3) / 3;
+      pPal->palPalEntry[i].peFlags = 0;
+    };
+
+    fl_gl_palette = CreatePalette(pPal);
+#endif // HAVE_GL
   }
   if (fl_palette) {
     SelectPalette(fl_gc, fl_palette, FALSE);
@@ -225,5 +243,5 @@ fl_select_palette(void)
 #endif
 
 //
-// End of "$Id: fl_color_win32.cxx,v 1.3 1998/10/21 14:20:45 mike Exp $".
+// End of "$Id: fl_color_win32.cxx,v 1.4 1998/11/08 15:55:23 mike Exp $".
 //