-/*
- 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>
#include <SDL_image.h>
#ifndef WIN32
-#include <pwd.h>
#include <sys/types.h>
#include <ctype.h>
#endif
#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!