void ShutdownRenderer()
{
// (I thought this was about SDLRenderer, not the example form!)
// Example Form change state, ignore the next couple lines and the comment above
CalculateWindowSize(true);
buttonInit.Text = "Init";
timer.Stop();
// Tell the examples the renderer is invalid
SDLExampleSet.UpdateRenderer(null);
// Tell SDLRenderer to stop it's thread. We do this so we don't destroy resources
// being used before destroying the renderer itself.
if (sdlRenderer != null)
{
sdlRenderer.DestroyWindow();
}
// While SDL2ThingLayer implements IDisposable in all it's classes and
// explicitly disposes of their resources in their destructors, I always
// like to clean up after myself (old habits).
ReleaseAssets();
// Dispose of the Renderer
if (sdlRenderer != null)
{
sdlRenderer.Dispose();
}
// This is all you really need to do though, GC will handle the rest
surface = null;
texture = null;
font = null;
sdlRenderer = null;
}
void BlitAsSprite(SDLRenderer renderer, SDLRenderer.Texture texture, double angle, Color c)
{
var pos = spinCentre.Add(RotateAround(spinDistance, angle));
var rect = new SDL.SDL_Rect(spriteRect.x + pos.x, spriteRect.y + pos.y, spriteRect.w, spriteRect.h);
texture.ColorMod = c;
renderer.Blit(rect, texture);
}
void ReleaseAssets()
{
if (textTure != null)
{
textTure.Dispose();
}
textTure = null;
}
void CreateAssetsFor(SDLRenderer renderer)
{
// Get the size of the message
textSize = font.TextSize(TEXT);
// Create a Surface for the message
var surface = font.TextBlended(TEXT, Color.White);
// Turn the surface into a Texture
textTure = renderer.CreateTextureFromSurface(surface);
}
void CreateAssetsForRenderer(SDLRenderer renderer)
{
// Load Surface from a file
//
// NOTE: Surfaces are deprecated and require conversion to Textures before blitting.
surface = renderer.LoadSurface("pointsprite.png");
// Set the blend mode for surface blitting
surface.BlendMode = SDL.SDL_BlendMode.SDL_BLENDMODE_BLEND;
// Create a Texture from the Surface.
//
// No need to set the blend mode, etc - all rendering information is copied
// directly in SDLRenderer.CreateTextureFromSurface() from the Surface settings.
texture = renderer.CreateTextureFromSurface(surface);
// Load a font from file.
font = renderer.CreateFont(12, "LibertySans.ttf");
if (font == null)
{
throw new Exception(string.Format("Unable to create font!\n\n{0}", SDL.SDL_GetError()));
}
}
void ReleaseAssets()
{
// Dispose of the Surface
if (surface != null)
{
sdlRenderer.DestroySurface(ref surface);
}
// Dispose of the Texture
if (texture != null)
{
sdlRenderer.DestroyTexture(ref texture);
}
// Dispose of the Font
if (Font != null)
{
sdlRenderer.DestroyFont(ref font);
}
surface = null;
texture = null;
font = null;
}
