GUIImage::GUIImage(const GUIImage& image_){
if (image_.sdl_impl == 0) throw Error("Cannot form a GUIImage from bad image");
SDL_Surface* temp = create_SDL_Surface(image_.getw(), image_.geth());
if (!temp){
throw Error("Could not copy GUIImage. Not enough memory.");
}
sdl_impl = SDL_DisplayFormat(temp);
if (!sdl_impl){
throw Error("Could not copy GUIImage. Not enough memory.");
}
Uint32 colorkey = image_.sdl_impl->format->colorkey;
Uint8 alpha = image_.sdl_impl->format->alpha;
// First fill background with the clear color, then display and re-clear.
SDL_FillRect(sdl_impl, 0, colorkey);
display_image(image_.sdl_impl, sdl_impl, 0, 0, 1);
if (image_.is_alpha /*|| alpha != 0*/) {
//Set all pixels of color R 0, G 0xFF, B 0xFF to be transparent
SDL_SetColorKey(sdl_impl, SDL_SRCCOLORKEY, colorkey);
}
}
GUIImage::GUIImage(SDL_Surface* surface)
:is_alpha(false)
{
if (surface == 0) throw Error("Cannot form a GUIImage from NULL surface!");
sdl_impl = surface;
}
GUIImage GUIImage::create_blank(int w, int h){
GUIImage result;
result.sdl_impl = create_SDL_Surface(w, h);
if (!result.sdl_impl){
throw Error("Could not create blank GUIImage. Not enough memory.");
}
return result;
}
GUIImage::GUIImage(int w, int h, bool alpha, const SDL_Color& color_key)
{
SDL_Surface* temp = create_SDL_Surface(w, h);
if (!temp){
throw Error("Could not create GUIImage. Not enough memory.");
}
sdl_impl = SDL_DisplayFormat(temp);
SDL_FreeSurface(temp);
if (!sdl_impl){
throw Error("Could not create GUIImage. Not enough memory.");
}
if (alpha){
//Map the color key
Uint32 colorkey = SDL_MapRGB(sdl_impl->format,
color_key.r, color_key.g, color_key.b);
//Set all pixels of color R 0xFF, G 0, B 0xFF to be transparent
SDL_SetColorKey(sdl_impl, SDL_SRCCOLORKEY, colorkey );
}
}