/// <summary>
/// Function to prepare the renderer for 2D rendering.
/// </summary>
/// <returns>A state recall object that is used to recall the previous state before this method was called.</returns>
/// <remarks>This method should be used to initialize a scene for 2D rendering. When this method is called, it will return an object that contains the current state before this method was called.
/// Use this state object with the <see cref="End2D"/> method to return the state back to the original settings.
/// </remarks>
public Gorgon2DStateRecall Begin2D()
{
var currentState = new Gorgon2DStateRecall(this);
SetDefaultStates();
return(currentState);
}
/// <summary>
/// Function to end 2D rendering and restore the state of the graphics interface.
/// </summary>
/// <param name="state">[Optional] The state object that contains the states returned by the <see cref="Begin2D"/> method.</param>
/// <remarks>This method is used to end 2D rendering and restore the state of the graphics API to the state recorded by the <paramref name="state"/> parameter. If NULL (Nothing in VB.Net)
/// is passed for the <paramref name="state"/> parameter, then the state will be reset to the state of the graphics interface before this renderer was created.
/// </remarks>
public void End2D(Gorgon2DStateRecall state = null)
{
_cache.Reset();
if (state == null)
{
if (_initialState == null)
{
return;
}
_initialState.Restore(false);
_initialState = null;
return;
}
// Reset the cache before updating the states.
state.Restore(false);
}
/// <summary>
/// Function to set up the renderers initial state.
/// </summary>
private void SetDefaultStates()
{
// Add shader includes if they're gone.
if (!Graphics.Shaders.IncludeFiles.Contains("Gorgon2DShaders"))
{
Graphics.Shaders.IncludeFiles.Add("Gorgon2DShaders", Encoding.UTF8.GetString(Resources.BasicSprite));
}
// Record the initial state before set up.
if (_initialState == null)
{
_initialState = new Gorgon2DStateRecall(this);
}
// Reset the cache values.
_cache.Reset();
// Set our default shaders.
VertexShader.Current = VertexShader.DefaultVertexShader;
PixelShader.Current = PixelShader.DefaultPixelShaderDiffuse;
Graphics.Input.IndexBuffer = DefaultIndexBuffer;
Graphics.Input.VertexBuffers[0] = DefaultVertexBufferBinding;
Graphics.Input.Layout = DefaultLayout;
Graphics.Input.PrimitiveType = PrimitiveType.TriangleList;
IsMultisamplingEnabled = Graphics.Rasterizer.States.IsMultisamplingEnabled;
if (PixelShader != null)
{
GorgonTextureSamplerStates sampler = GorgonTextureSamplerStates.LinearFilter;
sampler.TextureFilter = TextureFilter.Point;
Graphics.Shaders.PixelShader.TextureSamplers[0] = sampler;
Graphics.Shaders.PixelShader.Resources[0] = null;
}
Graphics.Rasterizer.States = GorgonRasterizerStates.CullBackFace;
Graphics.Output.BlendingState.States = GorgonBlendStates.DefaultStates;
Graphics.Output.DepthStencilState.States = GorgonDepthStencilStates.NoDepthStencil;
Graphics.Output.DepthStencilState.StencilReference = 0;
Graphics.Output.SetRenderTarget(_defaultTarget.Target, _defaultTarget.DepthStencil);
_currentTarget = _defaultTarget;
UpdateTarget(ref _currentTarget);
DefaultCamera.Update();
// Get the current state.
DefaultState = new Gorgon2DStateRecall(this);
// By default, turn on multi sampling over a count of 1.
if (Target.Resource.ResourceType != ResourceType.Texture2D)
{
return;
}
var target2D = (GorgonRenderTarget2D)Target.Resource;
if ((!IsMultisamplingEnabled) &&
((target2D.Settings.Multisampling.Count > 1) || (target2D.Settings.Multisampling.Quality > 0)) &&
((Graphics.VideoDevice.SupportedFeatureLevel == DeviceFeatureLevel.SM4_1) ||
(Graphics.VideoDevice.SupportedFeatureLevel == DeviceFeatureLevel.SM5)))
{
_multiSampleEnable = true;
}
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
private void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
// Dump any pending rendering.
_cache.Reset();
if (_initialState != null)
{
_initialState.Restore(true);
_initialState = null;
}
TrackedObjects.ReleaseAll();
if (Effects != null)
{
Effects.FreeEffects();
Effects = null;
}
if (_currentTarget.SwapChain != null)
{
_currentTarget.SwapChain.AfterSwapChainResized -= target_Resized;
}
if (DefaultLayout != null)
{
DefaultLayout.Dispose();
}
if (VertexShader != null)
{
VertexShader.CleanUp();
}
if (PixelShader != null)
{
PixelShader.CleanUp();
}
VertexShader = null;
PixelShader = null;
DefaultVertexBufferBinding.VertexBuffer.Dispose();
if (DefaultIndexBuffer != null)
{
DefaultIndexBuffer.Dispose();
}
if ((_systemCreatedTarget) && (_defaultTarget.Target != null))
{
_defaultTarget.Target.Resource.Dispose();
_defaultTarget = default(Gorgon2DTarget);
}
Graphics.RemoveTrackedObject(this);
}
_disposed = true;
}
