AGSurface &AVItem::getSurface()
{
CTRACE;
if(!inited)
init();
inited=true;
// filter surface
int x,y;
SDL_Surface *s=mSurface.surface();
// SDL_SaveBMP(s,"getSurface1.bmp");
Uint32 trans=SDL_MapRGB(s->format,255,255,255);
Uint32 shadow=SDL_MapRGB(s->format,191,191,191);
Uint32 ntrans=SDL_MapRGBA(s->format,0,0,0,0);
Uint32 nshadow=SDL_MapRGBA(s->format,0,0,0,0x7f);
for(x=0; x<mSurface.width(); x++)
for(y=0; y<mSurface.height(); y++)
{
Uint32 c=sge_GetPixel(s,x,y);
if(c==trans)
sge_PutPixel(s,x,y,ntrans);
else if(c==shadow)
sge_PutPixel(s,x,y,nshadow);
}
// SDL_SaveBMP(s,"getSurface2.bmp");
return mSurface;
}
SDL_Surface* LoadBackground( const char* a_pcFilename, int a_iNumColors, int a_iPaletteOffset, bool a_bTransparent )
{
char acFilepath[FILENAME_MAX+1];
strcpy( acFilepath, DATADIR );
strcat( acFilepath, "/gfx/" );
strcat( acFilepath, a_pcFilename );
SDL_Surface* poBackground = IMG_Load( acFilepath );
if (!poBackground)
{
debug( "Can't load file: %s\n", acFilepath );
return NULL;
}
SDL_Palette* pal = poBackground->format->palette;
if ( pal && gamescreen->format->palette )
{
int ncolors = pal->ncolors;
if (ncolors>a_iNumColors) ncolors = a_iNumColors;
if (ncolors+a_iPaletteOffset > 255) ncolors = 255 - a_iPaletteOffset;
SDL_SetColors( gamescreen, pal->colors, a_iPaletteOffset, ncolors );
}
SDL_Surface* poRetval = SDL_DisplayFormat( poBackground );
SDL_FreeSurface( poBackground );
// 2. TRY TO LOAD AN IMAGE MASK
// This means trying to load a .png file which acts as a mask for the
// original [jpg] image.
// If the original file is <Basename>.jpg, the mask is <Basename>.mask.png
int iLength = strlen( acFilepath );
char acMaskFilename[FILENAME_MAX+1];
strncpy( acMaskFilename, acFilepath, iLength-4 );
acMaskFilename[iLength-4] = 0;
strcat( acMaskFilename, ".mask.png" );
SDL_Surface* poMask = IMG_Load( acMaskFilename );
if ( !poMask )
{
// No mask.
return poRetval;
}
if ( poMask->w < poRetval->w
|| poMask->h < poRetval->h )
{
debug( "Error loading mask for %s: mask is too small.\n", acFilepath );
SDL_FreeSurface( poMask );
return poRetval;
}
debug( "Loading mask for %s.\n", acFilepath );
Uint32 iTransparent = SDL_MapRGB( gamescreen->format, 255, 217, 0 ); // an unlikely color in openmortal..
Uint32 iMask = sge_GetPixel( poMask, 0, 0 );
Uint32 iPixel;
for ( int y = 0; y < poRetval->h; ++y ) {
for ( int x=0; x< poRetval->w; ++x ) {
iPixel = sge_GetPixel( poMask, x, y );
// debug( "%d ", iPixel );
if ( iPixel == iMask ) {
sge_PutPixel( poRetval, x, y, iTransparent );
}
}
// debug( "\n" );
}
SDL_FreeSurface( poMask );
SDL_SetColorKey( poRetval, SDL_SRCCOLORKEY, iTransparent );
return poRetval;
}
