- fixed bomb-dup bug (vector increases on add, and this changes I guess, so remove...

[supertux.git] / src / screen.cpp

diff --git a/src/screen.cpp b/src/screen.cpp
index 40d1e7b..d9243f8 100644 (file)
--- a/src/screen.cpp
+++ b/src/screen.cpp
@@ -1,14 +1,21 @@
-/*
-  screen.c
-  
-  Super Tux - Screen Functions
-  
-  by Bill Kendrick
-  bill@newbreedsoftware.com
-  http://www.newbreedsoftware.com/supertux/
-  
-  April 11, 2000 - March 15, 2004
-*/
+//  $Id$
+//
+//  SuperTux -  A Jump'n Run
+//  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 2
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -18,8 +25,7 @@
 #include <SDL.h>
 #include <SDL_image.h>
 
-#ifdef LINUX
-#include <pwd.h>
+#ifndef WIN32
 #include <sys/types.h>
 #include <ctype.h>
 #endif
@@ -55,6 +61,39 @@ void clearscreen(int r, int g, int b)
 #endif
 }
 
+/* --- DRAWS A VERTICAL GRADIENT --- */
+
+void drawgradient(Color top_clr, Color bot_clr)
+{
+#ifndef NOOPENGL
+  if(use_gl)
+    {
+      glBegin(GL_QUADS);
+      glColor3ub(top_clr.red, top_clr.green, top_clr.blue);
+      glVertex2f(0, 0);
+      glVertex2f(640, 0);
+      glColor3ub(bot_clr.red, bot_clr.green, bot_clr.blue);
+      glVertex2f(640, 480);
+      glVertex2f(0, 480);
+      glEnd();
+    }
+  else
+  {
+#endif
+
+    for(float y = 0; y < 480; y += 2)
+      fillrect(0, (int)y, 640, 2,
+                     (int)(((float)(top_clr.red-bot_clr.red)/(0-480)) * y + top_clr.red),
+                     (int)(((float)(top_clr.green-bot_clr.green)/(0-480)) * y + top_clr.green),
+                     (int)(((float)(top_clr.blue-bot_clr.blue)/(0-480)) * y + top_clr.blue), 255);
+/* calculates the color for each line, based in the generic equation for functions: y = mx + b */
+
+#ifndef NOOPENGL
+
+    }
+#endif
+}
+
 /* 'Stolen' from the SDL documentation.
  * Set the pixel at (x, y) to the given value
  * NOTE: The surface must be locked before calling this!