/// <summary>
/// Initializes a FastTextRendering instance (create and build required ressources, ...).
/// </summary>
/// <param name="graphicsContext">The current GraphicsContext.</param>
private unsafe void Initialize(GraphicsContext graphicsContext, int maxCharacters)
{
maxCharacterCount = maxCharacters;
var indexBufferSize = maxCharacters * 6 * sizeof(int);
var indexBufferLength = indexBufferSize / IndexStride;
// Map and build the indice buffer
indexBuffer = graphicsContext.Allocator.GetTemporaryBuffer(new BufferDescription(indexBufferSize, BufferFlags.IndexBuffer, GraphicsResourceUsage.Dynamic));
var mappedIndices = graphicsContext.CommandList.MapSubresource(indexBuffer, 0, MapMode.WriteNoOverwrite, false, 0, indexBufferSize);
var indexPointer = mappedIndices.DataBox.DataPointer;
var i = 0;
for (var c = 0; c < maxCharacters; c++)
{
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 0;
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 1;
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 2;
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 1;
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 3;
*(int *)(indexPointer + IndexStride * i++) = c * 4 + 2;
}
graphicsContext.CommandList.UnmapSubresource(mappedIndices);
indexBufferBinding = new IndexBufferBinding(Buffer.Index.New(graphicsContext.CommandList.GraphicsDevice, new DataPointer(indexPointer, indexBufferSize)), true, indexBufferLength);
// Create vertex buffers
vertexBuffers = new Buffer[VertexBufferCount];
for (int j = 0; j < VertexBufferCount; j++)
{
vertexBuffers[j] = Buffer.Vertex.New(graphicsContext.CommandList.GraphicsDevice, new VertexPositionNormalTexture[VertexBufferLength], GraphicsResourceUsage.Dynamic);
}
vertexBuffersBinding = new VertexBufferBinding[VertexBufferCount];
for (int j = 0; j < VertexBufferCount; j++)
{
vertexBuffersBinding[j] = new VertexBufferBinding(vertexBuffers[j], VertexPositionNormalTexture.Layout, 0);
}
inputElementDescriptions = new InputElementDescription[VertexBufferCount][];
for (int j = 0; j < VertexBufferCount; j++)
{
inputElementDescriptions[j] = vertexBuffersBinding[j].Declaration.CreateInputElements();
}
// Create the pipeline state object
pipelineState = new MutablePipelineState(graphicsContext.CommandList.GraphicsDevice);
pipelineState.State.SetDefaults();
pipelineState.State.InputElements = inputElementDescriptions[0];
pipelineState.State.PrimitiveType = PrimitiveType.TriangleList;
// Create the effect
simpleEffect = new EffectInstance(new Effect(graphicsContext.CommandList.GraphicsDevice, SpriteEffect.Bytecode));
simpleEffect.Parameters.Set(TexturingKeys.Sampler, graphicsContext.CommandList.GraphicsDevice.SamplerStates.LinearClamp);
simpleEffect.UpdateEffect(graphicsContext.CommandList.GraphicsDevice);
}
protected override void Destroy()
{
for (int i = 0; i < VertexBufferCount; i++)
{
vertexBuffers[i].Dispose();
}
activeVertexBufferIndex = -1;
mappedVertexBufferPointer = IntPtr.Zero;
if (indexBuffer != null)
{
indexBuffer.Dispose();
indexBuffer = null;
}
indexBufferBinding = null;
pipelineState = null;
if (simpleEffect != null)
{
simpleEffect.Dispose();
simpleEffect = null;
}
for (int i = 0; i < VertexBufferCount; i++)
{
inputElementDescriptions[i] = null;
}
charsToRenderCount = -1;
base.Destroy();
}