Example03_Load.cpp

/*----------------------------------------------
   MegaStorm Tile-based Engine - Roberto Prieto
   Copyright (C) 2007-2012 MegaStorm Systems
  ----------------------------------------------
    
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.
    
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    
    Roberto Prieto
    contact@megastormsystems.com
    http://www.megastormsystems.com

    Note that all library licenses (including the one for this library)
    are located at /licenses directory. Please, include them on your applications.

 --------------------------------------------------------------------------

  How to use MSTE. Example 3: load a MSM file
  -------------------------------------------
  
  - This example loads the MSM created by the previous example.
  - Before exit, the level will be saved to an external MSM with current settings
    and the layer 1 is exported to an external image file.
  - Basic functions:
    Cursor keys Up/Down: for moving through the level.
    'p': pause/restore the movement
    'c': get the the cell position on layer 1 of current mouse cursor
    's': enable/disable the smooth scroll rendering
    'a': enable/disable autoscrolling feature on X axis
 */

// ---Includes---
#include "CRM32Pro.h"
#include "../source/MSTE.h"
#include "../source/MSTE_MapData.h"

// ---Defines---
#define EXAMPLE_VERSION "MSTE - Example03: Load MSM"

// ---Global vars---
cMSTE          *TE;

// ---Prototypes---
void RenderGraphics(int);

// -------------MAIN FUNCTION----------------
int main(int argc,char *argv[])
{
    Uint8          done = 0;
    SDL_Event      event;

    // -Log system initialize-  
    ILogSystem.Init("Example03_Load.log",LOG_FILE,LOG_NORMAL,EXAMPLE_VERSION);

    // -CRM32Pro and SDL initialize- 
    if(CRM32Pro.Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER) < 0)
    {
        ILogSystem.Msg(LOG_NORMAL," [LOG] - Couldn't initialize CRM32Pro: %s\n",SDL_GetError());
        return 1;
    }

    // -Desired config-
    CRM32Pro.Config.Title = EXAMPLE_VERSION;
    CRM32Pro.Config.VideoWidth = 640;
    CRM32Pro.Config.VideoHeight = 400;
    CRM32Pro.Config.bMTFriendly = 1;

    // -Graphics system initialize- 
    if(!CRM32Pro.SetVideoMode())
    {
        CRM32Pro.Quit();
        return 1;
    }

    // -Timer system-
    ITimeSystem->Init();
    ITimeSystem->SetRate(60,20); 
    CRM32Pro.SetRenderCallback(RenderGraphics);

    // -Init scroll engine-
    TE = new cMSTE;
    TE->Init(2);
    TE->SetRenderTarget(CRM32Pro.screen);

    // -Load our previous saved level-
    TE->LoadLevel("mylevel.msm");

    // -Set on autospeed on layers 1 & 2 and set the speed on X axis for layer 1-
    TE->SetLayerFlags(0,TE_LAYERFLAG_AUTOSCROLL,1);
    TE->SetLayerFlags(1,TE_LAYERFLAG_AUTOSCROLL,1);
    TE->SetLayerAutoScroll(1,32,TE_KEEP_VALUE);

    // -Main loop-
    int iPause = -1;
    int iSmooth = -1;
    int iAutoMoveFlag = -1;
    while(!done)
    {
        // Update all layers
        TE->Update();

        // Main system update and events loop
        while(CRM32Pro.Update(&event))
        {
            switch(event.type)
            { 
            case SDL_QUIT:
                done = 1;
                break;             
            case SDL_KEYDOWN:
                if(event.key.keysym.sym == SDLK_ESCAPE) done = 1;
                if(event.key.keysym.sym == SDLK_c) 
                {
                    int iCX,iCY;
                    iCX = iCY = -1;
                    TE->Screen2LayerCell(1,CRM32Pro.mouse_x,CRM32Pro.mouse_y,&iCX,&iCY);
                    ILogSystem.Msg(LOG_NORMAL," [Screen2LayerCell(1) => (%d,%d)\n",iCX,iCY);
                    TE->Screen2LayerAbsolute(1,CRM32Pro.mouse_x,CRM32Pro.mouse_y,&iCX,&iCY);
                    ILogSystem.Msg(LOG_NORMAL," [Screen2LayerAbsolute(1) => (%d,%d)\n",iCX,iCY);
                }
                if(event.key.keysym.sym == SDLK_p) 
                {
                    iPause = iPause * (-1);
                    TE->SetLayerFlags(0,TE_LAYERFLAG_PAUSE,iPause);
                    TE->SetLayerFlags(1,TE_LAYERFLAG_PAUSE,iPause);
                }
                if(event.key.keysym.sym == SDLK_s) 
                {
                    iSmooth = iSmooth * (-1);
                    TE->SetLayerFlags(0,TE_LAYERFLAG_SMOOTHSCROLL,iSmooth);
                    TE->SetLayerFlags(1,TE_LAYERFLAG_SMOOTHSCROLL,iSmooth);
                }
                if(event.key.keysym.sym == SDLK_a)
                {
                    iAutoMoveFlag = iAutoMoveFlag * (-1);
                    TE->SetLayerFlags(0,TE_LAYERFLAG_AUTOSCROLL,iAutoMoveFlag);
                    TE->SetLayerFlags(1,TE_LAYERFLAG_AUTOSCROLL,iAutoMoveFlag);
                }
                break;
            default:
                break;
            }
        }
        if(CRM32Pro.GetKeystate(SDLK_UP)) TE->MoveLayer(1,0,-2);
        if(CRM32Pro.GetKeystate(SDLK_DOWN)) TE->MoveLayer(1,0,2);        
    }

    // -Save current level status and export layer 1 to a PNG-
    TE->SaveLevel("mylevel.msm");
    TE->ExportImage(1,"layer1-image.png");

    // -Free resources-   
    TE->InfoPrint();
    TE->Quit();
    delete TE;   

    // -End-
    ITimeSystem->Info();
    CRM32Pro.VideoInfo();
    CRM32Pro.Quit();
    return 0;
}

// Our render graphics function
// We render our graphics if a logic frame occurred(bLogicUpdate = 1) or if CRM32Pro.IsRenderNeeded() return 1
void RenderGraphics(int bLogicUpdate)
{
    TE->Render();
}