____                _       __
    / __ )____  _____   | |     / /___ ___________
   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  )
 /_____/\____/____/     |__/|__/\__,_/_/  /____/

       A futuristic real-time strategy game.
          This file is part of Bos Wars.

(C) Copyright 2001-2007 by the Bos Wars and Stratagus Project. Distributed under the "GNU General Public License"

---

video.cpp

Go to the documentation of this file.

//     ____                _       __               
//    / __ )____  _____   | |     / /___ ___________
//   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
//  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  ) 
// /_____/\____/____/     |__/|__/\__,_/_/  /____/  
//                                              
//       A futuristic real-time strategy game.
//          This file is part of Bos Wars.
//
//
//      (c) Copyright 1999-2008 by Lutz Sammer, Nehal Mistry, and Jimmy Salmon
//
//      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; only version 2 of the License.
//
//      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.
//


/*----------------------------------------------------------------------------
-- Includes
----------------------------------------------------------------------------*/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "stratagus.h"

#include <vector>

#include "video.h"
#include "font.h"
#include "ui.h"
#include "cursor.h"
#include "iolib.h"

#include "intern_video.h"

#include "SDL.h"

/*----------------------------------------------------------------------------
--  Declarations
----------------------------------------------------------------------------*/

struct Clip {
    int X1;                             
    int Y1;                             
    int X2;                             
    int Y2;                             
};

/*----------------------------------------------------------------------------
--  Externals
----------------------------------------------------------------------------*/

extern void InitVideoSdl(void);         

extern void SdlLockScreen(void);        
extern void SdlUnlockScreen(void);      

/*----------------------------------------------------------------------------
--  Variables
----------------------------------------------------------------------------*/

CVideo Video;

bool UseOpenGL;                      

char VideoForceFullScreen;           

unsigned long NextFrameTicks;        
unsigned long FrameCounter;          
int SlowFrameCounter;                

int ClipX1;                      
int ClipY1;                      
int ClipX2;                      
int ClipY2;                      

static std::vector<Clip> Clips;

int VideoSyncSpeed = 100;            
int SkipFrames; 

Uint32 ColorBlack;
Uint32 ColorDarkGreen;
Uint32 ColorBlue;
Uint32 ColorOrange;
Uint32 ColorWhite;
Uint32 ColorGray;
Uint32 ColorRed;
Uint32 ColorGreen;
Uint32 ColorYellow;


/*----------------------------------------------------------------------------
--  Functions
----------------------------------------------------------------------------*/

void SetClipping(int left, int top, int right, int bottom)
{
    Assert(left <= right && top <= bottom && left >= 0 && left < Video.Width &&
        top >= 0 && top < Video.Height && right >= 0 &&
        right < Video.Width && bottom >= 0 && bottom < Video.Height);

    ClipX1 = left;
    ClipY1 = top;
    ClipX2 = right;
    ClipY2 = bottom;
}

void PushClipping(void)
{
    Clip clip = {ClipX1, ClipY1, ClipX2, ClipY2};
    Clips.push_back(clip);
}

void PopClipping(void)
{
    Clip clip = Clips.back();
    ClipX1 = clip.X1;
    ClipY1 = clip.Y1;
    ClipX2 = clip.X2;
    ClipY2 = clip.Y2;
    Clips.pop_back();
}

/*----------------------------------------------------------------------------
--  Functions
----------------------------------------------------------------------------*/

void CVideo::LockScreen(void)
{
    SdlLockScreen();
}

void CVideo::UnlockScreen(void)
{
    SdlUnlockScreen();
}

void CVideo::ClearScreen(void)
{
    FillRectangle(ColorBlack, 0, 0, Video.Width, Video.Height);
}

bool CVideo::ResizeScreen(int w, int h)
{
    if (VideoValidResolution(w, h)) {
        if (UseOpenGL) {
            FreeOpenGLGraphics();
            FreeOpenGLFonts();
            UI.Minimap.FreeOpenGL();
        }
        Width = w;
        Height = h;
        TheScreen = SDL_SetVideoMode(w, h, TheScreen->format->BitsPerPixel,
            TheScreen->flags);
        SetClipping(0, 0, Video.Width - 1, Video.Height - 1);
        if (UseOpenGL) {
            ReloadOpenGL();
        }
        return true;
    }
    return false;
}

unsigned long GetTicks(void)
{
    return SDL_GetTicks();
}

void InitVideo(void)
{
    InitVideoSdl();
    InitLineDraw();
}

---