int img_init;

srand(time(NULL));

m_x = m_y = x_offset = y_offset = 0;

/* initialize SDL`*/

putenv("SDL_VIDEO_WINDOW_POS");

putenv("SDL_VIDEO_CENTERED=1");

if(SDL_Init(SDL_INIT_EVERYTHING) < 0) {

err = new char[256];

sprintf(err, "Unable to initialize SDL: %s", SDL_GetError());

throw CException("isoeng.cpp", err);

}

/* create main window SDL drawing surface */

window_main = SDL_SetVideoMode(WM_WIDTH, WM_HEIGHT, 32, SDL_DOUBLEBUF);

if(window_main == NULL) {

err = new char[256];

sprintf(err, "Unable to set %dx%d video mode: %s", WM_WIDTH, WM_HEIGHT, SDL_GetError());

throw CException("isoeng.cpp", err);

}

SDL_WM_SetCaption(caption, caption);

/* initialize SDL_Image */

img_init = IMG_Init(IMG_INIT_PNG);

if((img_init & IMG_INIT_PNG) != IMG_INIT_PNG) {

err = new char[256];

sprintf(err, "Failed to initialize PNG support: %s", IMG_GetError());

throw CException("isoeng.cpp", err);

}

loadCursorImages();

loadTileImages();

IMG_Quit();

createSurfaces();

alive = true;

SDL_Event event;

if(SDL_PollEvent(&event)) {

switch(event.type) {

case SDL_QUIT:

alive = false;

break;

case SDL_KEYDOWN:

switch(event.key.keysym.sym) {

case SDLK_ESCAPE:

alive = false;

break;

case SDLK_LCTRL:

case SDLK_RCTRL:

SDL_ShowCursor(SDL_DISABLE);

cursor_style = 0;

break;

default:

break;

}

break;

case SDL_KEYUP:

switch(event.key.keysym.sym) {

case SDLK_LCTRL:

case SDLK_RCTRL:

SDL_ShowCursor(SDL_ENABLE);

break;

default:

break;

}

break;

case SDL_MOUSEMOTION:

if(cursor_style) {

x_offset += event.motion.xrel;

y_offset += event.motion.yrel;

} else if(m_x && m_y) {

SDL_GetMouseState(&c_x, &c_y);

}

break;

case SDL_MOUSEBUTTONDOWN:

if(!SDL_ShowCursor(SDL_QUERY)) {

cursor_style = 1;

} else {

SDL_GetMouseState(&m_x, &m_y);

c_x = m_x + 1;

c_y = m_y + 1;

}

break;

case SDL_MOUSEBUTTONUP:

cursor_style = 0;

m_x = m_y = 0;

break;

}

}

renderBackground();

if(!SDL_ShowCursor(SDL_QUERY)) {

grabBackground();

} else if(m_x && m_y) {

selectAssets();

}

SDL_Flip(window_main);

char* cursor_filename = "images/cursors.png";

SDL_Surface* load_surface = NULL;

load_surface = IMG_Load(cursor_filename);

if(load_surface == NULL) {

err = new char[256];

sprintf(err, "Failed to load cursors: %s", cursor_filename);

throw CException("isoeng.cpp", err);

}

cursors = SDL_DisplayFormatAlpha(load_surface);

SDL_FreeSurface(load_surface);

cursor_style = 0;

int i, j;

SDL_Surface* load_surface = NULL;

char* tile_filenames[TILE_SHEETS] = {

"images/my_tile.png",

"images/tile.png",

"images/tile2.png",

"images/tile3.png",

};

tile_sheets = new SDL_Surface*[TILE_SHEETS];

for(i = 0; i < TILE_SHEETS; i++) {

load_surface = IMG_Load(tile_filenames[i]);

if(load_surface == NULL) {

err = new char[256];

sprintf(err, "Failed to load image: %s", tile_filenames[i]);

throw CException("isoeng.cpp", err);

}

tile_sheets[i] = SDL_DisplayFormatAlpha(load_surface);

}

SDL_FreeSurface(load_surface);

tile = new Tile**[X_TILES];

for(i = 0; i < X_TILES; i++) {

tile[i] = new Tile*[Y_TILES];

for(j = 0; j < Y_TILES; j++) {

tile[i][j] = new Tile(i, j);

// tile[i][j] = new Tile(i, j, 0, 0, (rand() % 3));

}

}

bool even_row = false;

int i, j;

SDL_Rect src, dest;

area_select = SDL_CreateRGBSurface(SDL_SRCALPHA, WM_WIDTH, WM_HEIGHT, 32, window_main->format->Rmask, window_main->format->Gmask, window_main->format->Bmask, 0);

SDL_SetAlpha(area_select, SDL_SRCALPHA, 42);

SDL_FillRect(area_select, NULL, SDL_MapRGB(window_main->format, 0, 255, 32));

background = SDL_CreateRGBSurface(SDL_SRCALPHA, MAP_WIDTH, MAP_HEIGHT, 32, window_main->format->Rmask, window_main->format->Gmask, window_main->format->Bmask, 0);

src.w = TILE_WIDTH;

src.h = TILE_HEIGHT;

for(j = 0; j < Y_TILES; j++) {

for(i = 0; i < X_TILES; i++) {

src.x = tile[i][j]->image_x;

// src.x = (rand() % 2) * 32;

src.y = tile[i][j]->image_y;

dest.x = (16 * even_row) + (i * 32);

dest.y = j * 8;

SDL_BlitSurface(tile_sheets[tile[i][j]->sheet], &src, background, &dest);

}

even_row = !even_row;

}

SDL_Rect dest;

SDL_FillRect(window_main, NULL, 0);

dest.x = x_offset;

dest.y = y_offset;

SDL_BlitSurface(background, NULL, window_main, &dest);

SDL_Rect src, dest;

SDL_GetMouseState(&c_x, &c_y);

src.x = cursor_style * 16;

src.y = 0;

src.w = src.h = 16;

dest.x = c_x;

dest.y = c_y;

SDL_BlitSurface(cursors, &src, window_main, &dest);

SDL_Rect src, dest;

src.x = src.y = 0;

if((c_x - m_x) < 0) {

dest.x = c_x;

src.w = m_x - c_x;

} else {

dest.x = m_x;

src.w = c_x - m_x;

}

if((c_y - m_y) < 0) {

dest.y = c_y;

src.h = m_y - c_y;

} else {

dest.y = m_y;

src.h = c_y - m_y;

}

SDL_BlitSurface(area_select, &src, window_main, &dest);