SDL_Surface* CnCMap::getMiniMap(Uint8 pixsize) {
static ImageProc ip;
SDL_Rect pos = {0, 0, pixsize, pixsize};
SDL_Surface *cminitile;
if (pixsize == 0) {
// Argh
logger->error("CnCMap::getMiniMap: pixsize is zero, resetting to one\n");
pixsize = 1;
}
if(minimap != NULL) {
if (minimap->w == width*pixsize) {
return minimap;
} else {
// Each minimap surface is about 250k, so caching a lot of zooms
// would be somewhat expensive. Could make how much memory to set aside
// for this customizable so people with half a gig of RAM can see some
// usage :-)
// For now, just keep the previous one.
SDL_FreeSurface(oldmmap);
oldmmap = minimap;
minimap = NULL;
}
}
if (oldmmap != NULL && (oldmmap->w == pixsize*width)) {
minimap = oldmmap;
oldmmap = NULL;
return minimap;
}
minimap = SDL_CreateRGBSurface (SDL_SWSURFACE, width*pixsize,height*pixsize, 16,
0xff, 0xff, 0xff, 0);
SDL_Surface *maptileOne = getMapTile(0);
minimap->format->Rmask = maptileOne->format->Rmask;
minimap->format->Gmask = maptileOne->format->Gmask;
minimap->format->Bmask = maptileOne->format->Bmask;
minimap->format->Amask = maptileOne->format->Amask;
if( maptileOne->format->palette != NULL ) {
SDL_SetColors(minimap, maptileOne->format->palette->colors, 0,
maptileOne->format->palette->ncolors);
}
int lineCounter = 0;
for(Uint32 i = 0; i < (Uint32) width*height; i++, pos.x += pixsize,
lineCounter++) {
if(lineCounter == width) {
pos.y += pixsize;
pos.x = 0;
lineCounter = 0;
}
cminitile = ip.minimapScale(getMapTile(i), pixsize);
SDL_BlitSurface(cminitile, NULL, minimap, &pos);
SDL_FreeSurface(cminitile);
}
/* Now fill in clipping details for renderer and UI.
* To make things easier, ensure that the geometry is divisable by the
* specified width and height.
*/
Uint16 tx = min(miniclip.sidew, (Uint16)minimap->w);
Uint16 ty = min(tx, (Uint16)minimap->h);
// w == width in pixels of the minimap
miniclip.w = pixsize*(int)floor((double)tx/(double)pixsize);
miniclip.h = pixsize*(int)floor((double)ty/(double)pixsize);
// x == offset in pixels from the top-left hand corner of the sidebar under
// the tab.
miniclip.x = abs(miniclip.sidew-miniclip.w)/2+20;
miniclip.y = abs(miniclip.sidew-miniclip.h)/2+5;
// Tilew == number of tiles visible in minimap horizontally
miniclip.tilew = miniclip.w/pixsize;
miniclip.tileh = miniclip.h/pixsize;
// pixsize == number of pixels wide and high a minimap tile is
miniclip.pixsize = pixsize;
return minimap;
}
