public void LoadSubData(IntPtr offset, IntPtr data, int size)
{
if (size < 0)
{
throw new ArgumentException("Size cannot be less than zero.");
}
if (this.bufferSize == 0)
{
throw new InvalidOperationException(string.Format(
"Cannot update {0}, because its storage was not initialized yet.",
typeof(NativeGraphicsBuffer).Name));
}
if ((uint)offset + size > this.bufferSize)
{
throw new ArgumentException(string.Format(
"Cannot update {0} with offset {1} and size {2}, as this exceeds the internal " +
"storage size {3}.",
typeof(NativeGraphicsBuffer).Name,
offset,
size,
this.bufferSize));
}
NativeGraphicsBuffer prevBound = GetBound(this.type);
Bind(this.type, this);
BufferTarget target = ToOpenTKBufferType(this.type);
GL.BufferSubData(target, offset, size, data);
Bind(this.type, prevBound);
}
void IDualityBackend.Shutdown()
{
if (activeInstance == this)
{
activeInstance = null;
}
if (DualityApp.ExecContext != DualityApp.ExecutionContext.Terminated)
{
DefaultOpenTKBackendPlugin.GuardSingleThreadState();
if (this.sharedBatchIBO != null)
{
this.sharedBatchIBO.Dispose();
this.sharedBatchIBO = null;
}
}
// Since the window outlives the graphics backend in the usual launcher setup,
// we'll need to unhook early, so Duality can complete its cleanup before the window does.
if (this.activeWindow != null)
{
this.activeWindow.UnhookFromDuality();
this.activeWindow = null;
}
}
public static void Bind(GraphicsBufferType type, NativeGraphicsBuffer buffer)
{
if (GetBound(type) == buffer)
{
return;
}
SetBound(type, buffer);
BufferTarget target = ToOpenTKBufferType(type);
GL.BindBuffer(target, buffer != null ? buffer.Handle : 0);
}
private static void SetBound(GraphicsBufferType type, NativeGraphicsBuffer buffer)
{
if (type == GraphicsBufferType.Vertex)
{
boundVertex = buffer;
}
else if (type == GraphicsBufferType.Index)
{
boundIndex = buffer;
}
else
{
return;
}
}
public void SetupEmpty(int size)
{
if (size < 0)
{
throw new ArgumentException("Size cannot be less than zero.");
}
NativeGraphicsBuffer prevBound = GetBound(this.type);
Bind(this.type, this);
BufferTarget target = ToOpenTKBufferType(this.type);
GL.BufferData(target, size, IntPtr.Zero, BufferUsageHint.StreamDraw);
this.bufferSize = size;
Bind(this.type, prevBound);
}
/// <summary>
/// Draws the vertices of a single <see cref="DrawBatch"/>, after all other rendering state
/// has been set up accordingly outside this method.
/// </summary>
/// <param name="buffer"></param>
/// <param name="ranges"></param>
/// <param name="mode"></param>
private void DrawVertexBatch(VertexBuffer buffer, RawList <VertexDrawRange> ranges, VertexMode mode)
{
NativeGraphicsBuffer indexBuffer = (buffer.IndexCount > 0 ? buffer.NativeIndex : null) as NativeGraphicsBuffer;
IndexDataElementType indexType = buffer.IndexType;
// Since the QUADS primitive is deprecated in OpenGL 3.0 and not available in OpenGL ES,
// we'll emulate this with an ad-hoc index buffer object that we generate here.
if (mode == VertexMode.Quads)
{
if (indexBuffer != null)
{
Logs.Core.WriteWarning(
"Rendering {0} instances that use index buffers is not supported for quads geometry. " +
"To use index buffers, use any other geometry type listed in {1}. Skipping batch.",
typeof(DrawBatch).Name,
typeof(VertexMode).Name);
return;
}
NativeGraphicsBuffer.Bind(GraphicsBufferType.Index, this.sharedBatchIBO);
this.GenerateQuadIndices(ranges, this.sharedBatchIndices);
this.sharedBatchIBO.LoadData(
this.sharedBatchIndices.Data,
0,
this.sharedBatchIndices.Count);
GL.DrawElements(
PrimitiveType.Triangles,
this.sharedBatchIndices.Count,
DrawElementsType.UnsignedShort,
IntPtr.Zero);
this.sharedBatchIndices.Clear();
}
// Otherwise, run the regular rendering path
else
{
// Rendering using index buffer
if (indexBuffer != null)
{
if (ranges != null && ranges.Count > 0)
{
Logs.Core.WriteWarning(
"Rendering {0} instances that use index buffers do not support specifying vertex ranges, " +
"since the two features are mutually exclusive.",
typeof(DrawBatch).Name,
typeof(VertexMode).Name);
}
NativeGraphicsBuffer.Bind(GraphicsBufferType.Index, indexBuffer);
PrimitiveType openTkMode = GetOpenTKVertexMode(mode);
DrawElementsType openTkIndexType = GetOpenTKIndexType(indexType);
GL.DrawElements(
openTkMode,
buffer.IndexCount,
openTkIndexType,
IntPtr.Zero);
}
// Rendering using an array of vertex ranges
else
{
NativeGraphicsBuffer.Bind(GraphicsBufferType.Index, null);
PrimitiveType openTkMode = GetOpenTKVertexMode(mode);
VertexDrawRange[] rangeData = ranges.Data;
int rangeCount = ranges.Count;
for (int r = 0; r < rangeCount; r++)
{
GL.DrawArrays(
openTkMode,
rangeData[r].Index,
rangeData[r].Count);
}
}
}
}
void IGraphicsBackend.Render(IReadOnlyList <DrawBatch> batches)
{
if (batches.Count == 0)
{
return;
}
this.RetrieveActiveShaders(batches);
this.SetupSharedParameters(this.renderOptions.ShaderParameters);
int drawCalls = 0;
DrawBatch lastRendered = null;
for (int i = 0; i < batches.Count; i++)
{
DrawBatch batch = batches[i];
VertexDeclaration vertexType = batch.VertexBuffer.VertexType;
// Bind the vertex buffer we'll use. Note that this needs to be done
// before setting up any vertex format state.
NativeGraphicsBuffer vertexBuffer = batch.VertexBuffer.NativeVertex as NativeGraphicsBuffer;
NativeGraphicsBuffer.Bind(GraphicsBufferType.Vertex, vertexBuffer);
bool first = (i == 0);
bool sameMaterial =
lastRendered != null &&
lastRendered.Material.Equals(batch.Material);
// Setup vertex bindings. Note that the setup differs based on the
// materials shader, so material changes can be vertex binding changes.
if (lastRendered != null)
{
this.FinishVertexFormat(lastRendered.Material, lastRendered.VertexBuffer.VertexType);
}
this.SetupVertexFormat(batch.Material, vertexType);
// Setup material when changed.
if (!sameMaterial)
{
this.SetupMaterial(
batch.Material,
lastRendered != null ? lastRendered.Material : null);
}
// Draw the current batch
this.DrawVertexBatch(
batch.VertexBuffer,
batch.VertexRanges,
batch.VertexMode);
drawCalls++;
lastRendered = batch;
}
// Cleanup after rendering
NativeGraphicsBuffer.Bind(GraphicsBufferType.Vertex, null);
NativeGraphicsBuffer.Bind(GraphicsBufferType.Index, null);
if (lastRendered != null)
{
this.FinishMaterial(lastRendered.Material);
this.FinishVertexFormat(lastRendered.Material, lastRendered.VertexBuffer.VertexType);
}
if (this.renderStats != null)
{
this.renderStats.DrawCalls += drawCalls;
}
this.FinishSharedParameters();
}
void IGraphicsBackend.BeginRendering(IDrawDevice device, RenderOptions options, RenderStats stats)
{
DebugCheckOpenGLErrors();
this.CheckRenderingCapabilities();
this.currentDevice = device;
this.renderOptions = options;
this.renderStats = stats;
// Prepare a shared index buffer object, in case we don't have one yet
if (this.sharedBatchIBO == null)
{
this.sharedBatchIBO = new NativeGraphicsBuffer(GraphicsBufferType.Index);
}
// Prepare the target surface for rendering
NativeRenderTarget.Bind(options.Target as NativeRenderTarget);
// Determine whether masked blending should use alpha-to-coverage mode
if (this.msaaIsDriverDisabled)
{
this.useAlphaToCoverageBlend = false;
}
else if (NativeRenderTarget.BoundRT != null)
{
this.useAlphaToCoverageBlend = NativeRenderTarget.BoundRT.Samples > 0;
}
else if (this.activeWindow != null)
{
this.useAlphaToCoverageBlend = this.activeWindow.IsMultisampled;
}
else
{
this.useAlphaToCoverageBlend = this.defaultGraphicsMode.Samples > 0;
}
// Determine the available size on the active rendering surface
Point2 availableSize;
if (NativeRenderTarget.BoundRT != null)
{
availableSize = new Point2(NativeRenderTarget.BoundRT.Width, NativeRenderTarget.BoundRT.Height);
}
else if (this.activeWindow != null)
{
availableSize = new Point2(this.activeWindow.Width, this.activeWindow.Height);
}
else
{
availableSize = this.externalBackbufferSize;
}
// Translate viewport coordinates to OpenGL screen coordinates (borrom-left, rising), unless rendering
// to a texture, which is laid out Duality-like (top-left, descending)
Rect openGLViewport = options.Viewport;
if (NativeRenderTarget.BoundRT == null)
{
openGLViewport.Y = (availableSize.Y - openGLViewport.H) - openGLViewport.Y;
}
// Setup viewport and scissor rects
GL.Viewport((int)openGLViewport.X, (int)openGLViewport.Y, (int)MathF.Ceiling(openGLViewport.W), (int)MathF.Ceiling(openGLViewport.H));
GL.Scissor((int)openGLViewport.X, (int)openGLViewport.Y, (int)MathF.Ceiling(openGLViewport.W), (int)MathF.Ceiling(openGLViewport.H));
// Clear buffers
ClearBufferMask glClearMask = 0;
ColorRgba clearColor = options.ClearColor;
if ((options.ClearFlags & ClearFlag.Color) != ClearFlag.None)
{
glClearMask |= ClearBufferMask.ColorBufferBit;
}
if ((options.ClearFlags & ClearFlag.Depth) != ClearFlag.None)
{
glClearMask |= ClearBufferMask.DepthBufferBit;
}
GL.ClearColor(clearColor.R / 255.0f, clearColor.G / 255.0f, clearColor.B / 255.0f, clearColor.A / 255.0f);
GL.ClearDepth((double)options.ClearDepth); // The "float version" is from OpenGL 4.1..
GL.Clear(glClearMask);
// Configure Rendering params
GL.Enable(EnableCap.ScissorTest);
GL.Enable(EnableCap.DepthTest);
if (options.DepthTest)
{
GL.DepthFunc(DepthFunction.Lequal);
}
else
{
GL.DepthFunc(DepthFunction.Always);
}
// Prepare shared matrix stack for rendering
Matrix4 viewMatrix = options.ViewMatrix;
Matrix4 projectionMatrix = options.ProjectionMatrix;
if (NativeRenderTarget.BoundRT != null)
{
Matrix4 flipOutput = Matrix4.CreateScale(1.0f, -1.0f, 1.0f);
projectionMatrix = projectionMatrix * flipOutput;
}
this.renderOptions.ShaderParameters.Set(
BuiltinShaderFields.ViewMatrix,
viewMatrix);
this.renderOptions.ShaderParameters.Set(
BuiltinShaderFields.ProjectionMatrix,
projectionMatrix);
this.renderOptions.ShaderParameters.Set(
BuiltinShaderFields.ViewProjectionMatrix,
viewMatrix * projectionMatrix);
}