/*
* SDL.createRGBSurfaceWithFormat(
* width,
* height,
* depth = 32,
* format = SDL.pixelFormat.RGBA32)
*
* Create a surface object with the specified format and return it.
*
* Returns:
* The surface or nil
* The error message
*/
static int l_surface_createRGBWithFormat(lua_State *L)
{
int width = luaL_checkinteger(L, 1);
int height = luaL_checkinteger(L, 2);
int depth = luaL_optinteger(L, 3, 32);
int format = luaL_optinteger(L, 4, SDL_PIXELFORMAT_RGBA32);
SDL_Surface *s;
s = SDL_CreateRGBSurfaceWithFormat(0, width, height, depth, format);
if (s == NULL)
return commonPushSDLError(L, 1);
return commonPush(L, "p", SurfaceName, s);
}
//
// SDLVideoDriver::SetPrimaryBuffer
//
// Create a software surface for the game engine to render frames into and
// set it to video.screens[0].
//
void SDLVideoDriver::SetPrimaryBuffer()
{
int bump = (video.width == 512 || video.width == 1024) ? 4 : 0;
if(window)
{
// SDL_FIXME: This won't be sufficient once a truecolour renderer is implemented
primary_surface = SDL_CreateRGBSurfaceWithFormat(0, video.width + bump, video.height,
0, SDL_PIXELFORMAT_INDEX8);
if(!primary_surface)
I_Error("SDLVideoDriver::SetPrimaryBuffer: failed to create screen temp buffer\n");
Uint32 pixelformat = SDL_GetWindowPixelFormat(window);
if(pixelformat == SDL_PIXELFORMAT_UNKNOWN)
pixelformat = SDL_PIXELFORMAT_RGBA32;
rgba_surface = SDL_CreateRGBSurfaceWithFormat(0, video.width + bump, video.height,
0, pixelformat);
if(!rgba_surface)
{
I_Error("SDLVideoDriver::SetPrimaryBuffer: failed to create true-colour buffer: %s\n",
SDL_GetError());
}
sdltexture = SDL_CreateTexture(renderer, pixelformat,
SDL_TEXTUREACCESS_STREAMING,
video.width + bump, video.height);
if(!sdltexture)
{
I_Error("SDLVideoDriver::SetPrimaryBuffer: failed to create rendering texture: %s\n",
SDL_GetError());
}
video.screens[0] = static_cast<byte *>(primary_surface->pixels);
video.pitch = primary_surface->pitch;
}
}
/*
* Create an empty RGB surface of the appropriate depth
*/
SDL_Surface *
SDL_CreateRGBSurface(Uint32 flags,
int width, int height, int depth,
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
{
Uint32 format;
/* Get the pixel format */
format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
if (format == SDL_PIXELFORMAT_UNKNOWN) {
SDL_SetError("Unknown pixel format");
return NULL;
}
return SDL_CreateRGBSurfaceWithFormat(flags, width, height, depth, format);
}
/*
* Create an RGB surface from an existing memory buffer using the given given
* enum SDL_PIXELFORMAT_* format
*/
SDL_Surface *
SDL_CreateRGBSurfaceWithFormatFrom(void *pixels,
int width, int height, int depth, int pitch,
Uint32 format)
{
SDL_Surface *surface;
surface = SDL_CreateRGBSurfaceWithFormat(0, 0, 0, depth, format);
if (surface != NULL) {
surface->flags |= SDL_PREALLOC;
surface->pixels = pixels;
surface->w = width;
surface->h = height;
surface->pitch = pitch;
SDL_SetClipRect(surface, NULL);
}
return surface;
}
SDL_Surface *Surface::createSurfaceWithFormat(int width, int height,
int depth, uint32_t format)
{
#if SDL_VERSION_ATLEAST(2, 0, 5)
return SDL_CreateRGBSurfaceWithFormat(0, width, height, depth, format);
#else
SDL_Surface *unoptSurface = SDL_CreateRGBSurface(0, width, height,
depth, 0, 0, 0, 0);
SDL_Surface *optSurface = SDL_ConvertSurfaceFormat(unoptSurface, format, 0);
SDL_FreeSurface(unoptSurface);
// Surfaces with alpha are set up for blending by default.
if (optSurface->format->Amask != 0)
{
SDL_SetSurfaceBlendMode(optSurface, SDL_BLENDMODE_BLEND);
}
return optSurface;
#endif
}
