blame: source/code/CppSdl/CppSdlImageHolder.cpp

/* 

 * File:   CppSdlImageHolder.cpp

 * Author: poul

 * 

 * Created on 29. september 2010, 19:46

 */

#include "CppSdlImageHolder.hpp"

#include "SDL_image.h"

namespace CppSdl {

CppSdlImageHolder::CppSdlImageHolder(std::string filename) {

    data = IMG_Load(filename.c_str());

    if(!data)

    {

        //Here we should throw an exception

        CppSdlException e("Could not read file \""+filename+"\"");

        throw e;

    }

    SDL_GetClipRect(data,&area);

    counter=1;

}

CppSdlImageHolder::CppSdlImageHolder(const CppSdlImageHolder& orig) {

    //Just take the data from the original. This is technically wrong but adds a little performance.

    data = orig.data;

    area = orig.area;

    counter++;

}

CppSdlImageHolder::CppSdlImageHolder(char* rawdata, int datasize) {

    SDL_RWops *rw = SDL_RWFromMem (rawdata, datasize);

    //The above might fail an return null.

    if(!rw)

    {

        CppSdlException e("Could not read raw data");

        throw e;

    }

    SDL_Surface* data = IMG_Load_RW(rw,false); //the second argument tells the function to three RWops

    if(!data)

    {

        CppSdlException e("Could not read raw data");

        throw e;

    }

    SDL_GetClipRect(data,&area);

    counter = 1;

}

CppSdlImageHolder::~CppSdlImageHolder() {

    counter--;

    if(counter == 0)

    {

        SDL_FreeSurface(data);

        data = NULL;

    }

}

SDL_Surface* CppSdlImageHolder::GetRawDataInsecure()

{

    return data;

}

Uint32 CppSdlImageHolder::GetWidth()

{

    return area.w;

}

Uint32 CppSdlImageHolder::GetHeight()

{

    return area.h;

}

void CppSdlImageHolder::Cut(Uint32 x, Uint32 y, Sint32 w = -1, Sint32 h = -1)

{

    if(w<0)

    {

        w = GetWidth() - x;

    }

    if(h<0)

    {

        h = GetHeight() - y;

    }

    if(x+w>GetWidth())

    {

        //throw exception

    }

    if(y+h>GetHeight())

    {

        //throw exception

    }

    if(x<0 || x>GetWidth())

    {

        //throw exception

    }

    if(y<0 || y>GetHeight())

    {

        //throw exception

    }

    area.x += x;

    area.y += y;

    area.w = w;

    area.h = h;

}

}