public virtual void Render(ID3D11DeviceContext context, PrimitiveTopology type, int size, uint offset)
{
context.IASetInputLayout(Layout);
// set shaders only if available
if (OurVertexShader != null)
{
context.VSSetShader(OurVertexShader);
}
if (OurVertexShader != null)
{
context.PSSetShader(OurPixelShader);
context.PSSetSampler(0, SamplerState);
}
if (OurVertexShader != null)
{
context.GSSetShader(OurGeometryShader);
}
context.DrawIndexed(size, (int)offset, 0);
Profiler.NumDrawCallsThisFrame++;
}
public static void DrawIndexed(this ID3D11DeviceContext context, int indexCount, int startIndexLocation, int baseVertexLocation)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
context.DrawIndexed((uint)indexCount, (uint)startIndexLocation, baseVertexLocation);
}
public void Draw(ID3D11Device device, ID3D11DeviceContext context, Span <D3D11_INPUT_ELEMENT_DESC> _layout)
{
if (!m_vertexBuffer)
{
using (var pin = PinPtr.Create(m_vertices))
{
var desc = new D3D11_BUFFER_DESC
{
ByteWidth = (uint)m_vertices.Length,
Usage = D3D11_USAGE._DEFAULT,
BindFlags = (uint)D3D11_BIND_FLAG._VERTEX_BUFFER,
};
var data = new D3D11_SUBRESOURCE_DATA
{
pSysMem = pin.Ptr
};
device.CreateBuffer(ref desc, ref data,
out m_vertexBuffer).ThrowIfFailed();
}
}
Span <IntPtr> pBufferTbl = stackalloc IntPtr[] { m_vertexBuffer.Ptr };
Span <uint> SizeTbl = stackalloc uint[] { (uint)m_vertexSize };
Span <uint> OffsetTbl = stackalloc uint[] { 0 };
context.IASetVertexBuffers(0, 1,
ref MemoryMarshal.GetReference(pBufferTbl),
ref MemoryMarshal.GetReference(SizeTbl),
ref MemoryMarshal.GetReference(OffsetTbl));
if (!m_indexBuffer)
{
using (var pin = PinPtr.Create(m_indices))
{
var desc = new D3D11_BUFFER_DESC
{
ByteWidth = (uint)m_indices.Length,
Usage = D3D11_USAGE._DEFAULT,
BindFlags = (uint)D3D11_BIND_FLAG._INDEX_BUFFER,
};
var data = new D3D11_SUBRESOURCE_DATA
{
pSysMem = pin.Ptr
};
device.CreateBuffer(ref desc, ref data,
out m_indexBuffer).ThrowIfFailed();
}
}
context.IASetIndexBuffer(m_indexBuffer, m_indexFormat, 0);
context.IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY._TRIANGLELIST);
context.DrawIndexed((uint)m_indexCount, 0, 0);
}
}
}
public override void Render(ID3D11DeviceContext deviceContext, PrimitiveTopology type, int size, uint offset)
{
deviceContext.IASetInputLayout(Layout);
deviceContext.VSSetShader(OurVertexShader);
deviceContext.PSSetShader(OurPixelShader);
switch (type)
{
case PrimitiveTopology.LineList:
case PrimitiveTopology.TriangleList:
deviceContext.DrawIndexed(size, (int)offset, 0);
break;
case PrimitiveTopology.LineStrip:
deviceContext.Draw(size, 0);
break;
default:
break;
}
Profiler.NumDrawCallsThisFrame++;
}
public void Draw(ID3D11Device device, ID3D11DeviceContext context, Span <VertexAttribute> layout)
{
Span <IntPtr> buffers = stackalloc IntPtr[layout.Length];
Span <uint> strides = stackalloc uint[layout.Length];
Span <uint> offsets = stackalloc uint[layout.Length];
for (int i = 0; i < layout.Length; ++i)
{
var va = layout[i];
if (m_vertexBufferMap.TryGetValue(va.Semantic, out VertexBuffer vb))
{
buffers[i] = vb.GetPtr(device);
strides[i] = (uint)vb.Stride;
}
}
context.IASetVertexBuffers(0, (uint)layout.Length,
ref MemoryMarshal.GetReference(buffers),
ref MemoryMarshal.GetReference(strides),
ref MemoryMarshal.GetReference(offsets));
context.IASetIndexBuffer(m_indexBuffer.Buffer, m_indexFormat, 0);
context.IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY._TRIANGLELIST);
context.DrawIndexed((uint)m_indexCount, 0, 0);
}
public void Render(ImDrawDataPtr data)
{
// Avoid rendering when minimized
if (data.DisplaySize.X <= 0.0f || data.DisplaySize.Y <= 0.0f)
{
return;
}
ID3D11DeviceContext ctx = deviceContext;
if (vertexBuffer == null || vertexBufferSize < data.TotalVtxCount)
{
vertexBuffer?.Release();
vertexBufferSize = data.TotalVtxCount + 5000;
BufferDescription desc = new BufferDescription();
desc.Usage = Vortice.Direct3D11.Usage.Dynamic;
desc.SizeInBytes = vertexBufferSize * sizeof(ImDrawVert);
desc.BindFlags = BindFlags.VertexBuffer;
desc.CpuAccessFlags = CpuAccessFlags.Write;
vertexBuffer = device.CreateBuffer(desc);
}
if (indexBuffer == null || indexBufferSize < data.TotalIdxCount)
{
indexBuffer?.Release();
indexBufferSize = data.TotalIdxCount + 10000;
BufferDescription desc = new BufferDescription();
desc.Usage = Vortice.Direct3D11.Usage.Dynamic;
desc.SizeInBytes = indexBufferSize * sizeof(ImDrawIdx);
desc.BindFlags = BindFlags.IndexBuffer;
desc.CpuAccessFlags = CpuAccessFlags.Write;
indexBuffer = device.CreateBuffer(desc);
}
// Upload vertex/index data into a single contiguous GPU buffer
var vertexResource = ctx.Map(vertexBuffer, 0, MapMode.WriteDiscard, Vortice.Direct3D11.MapFlags.None);
var indexResource = ctx.Map(indexBuffer, 0, MapMode.WriteDiscard, Vortice.Direct3D11.MapFlags.None);
var vertexResourcePointer = (ImDrawVert *)vertexResource.DataPointer;
var indexResourcePointer = (ImDrawIdx *)indexResource.DataPointer;
for (int n = 0; n < data.CmdListsCount; n++)
{
var cmdlList = data.CmdListsRange[n];
var vertBytes = cmdlList.VtxBuffer.Size * sizeof(ImDrawVert);
Buffer.MemoryCopy((void *)cmdlList.VtxBuffer.Data, vertexResourcePointer, vertBytes, vertBytes);
var idxBytes = cmdlList.IdxBuffer.Size * sizeof(ImDrawIdx);
Buffer.MemoryCopy((void *)cmdlList.IdxBuffer.Data, indexResourcePointer, idxBytes, idxBytes);
vertexResourcePointer += cmdlList.VtxBuffer.Size;
indexResourcePointer += cmdlList.IdxBuffer.Size;
}
ctx.Unmap(vertexBuffer, 0);
ctx.Unmap(indexBuffer, 0);
// Setup orthographic projection matrix into our constant buffer
// Our visible imgui space lies from draw_data.DisplayPos (top left) to draw_data.DisplayPos+data_data.DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
var constResource = ctx.Map(constantBuffer, 0, MapMode.WriteDiscard, Vortice.Direct3D11.MapFlags.None);
var span = constResource.AsSpan <float>(VertexConstantBufferSize);
float L = data.DisplayPos.X;
float R = data.DisplayPos.X + data.DisplaySize.X;
float T = data.DisplayPos.Y;
float B = data.DisplayPos.Y + data.DisplaySize.Y;
float[] mvp =
{
2.0f / (R - L), 0.0f, 0.0f, 0.0f,
0.0f, 2.0f / (T - B), 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
(R + L) / (L - R), (T + B) / (B - T), 0.5f, 1.0f,
};
mvp.CopyTo(span);
ctx.Unmap(constantBuffer, 0);
SetupRenderState(data, ctx);
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
int global_idx_offset = 0;
int global_vtx_offset = 0;
Vector2 clip_off = data.DisplayPos;
for (int n = 0; n < data.CmdListsCount; n++)
{
var cmdList = data.CmdListsRange[n];
for (int i = 0; i < cmdList.CmdBuffer.Size; i++)
{
var cmd = cmdList.CmdBuffer[i];
if (cmd.UserCallback != IntPtr.Zero)
{
throw new NotImplementedException("user callbacks not implemented");
}
else
{
var rect = new Rect((int)(cmd.ClipRect.X - clip_off.X), (int)(cmd.ClipRect.Y - clip_off.Y), (int)(cmd.ClipRect.Z - clip_off.X), (int)(cmd.ClipRect.W - clip_off.Y));
ctx.RSSetScissorRects(rect);
textureResources.TryGetValue(cmd.TextureId, out var texture);
if (texture != null)
{
ctx.PSSetShaderResources(0, texture);
}
ctx.DrawIndexed((int)cmd.ElemCount, (int)(cmd.IdxOffset + global_idx_offset), (int)(cmd.VtxOffset + global_vtx_offset));
}
}
global_idx_offset += cmdList.IdxBuffer.Size;
global_vtx_offset += cmdList.VtxBuffer.Size;
}
}