private unsafe void RenderImDrawData(DrawData *draw_data, RenderContext rc)
{
VertexDescriptor descriptor = new VertexDescriptor((byte)sizeof(DrawVert), 3, 0, IntPtr.Zero);
int vertexOffsetInVertices = 0;
int indexOffsetInElements = 0;
if (draw_data->CmdListsCount == 0)
{
return;
}
for (int i = 0; i < draw_data->CmdListsCount; i++)
{
DrawList *cmd_list = draw_data->CmdLists[i];
_vertexBuffer.SetVertexData(new IntPtr(cmd_list->VtxBuffer.Data), descriptor, cmd_list->VtxBuffer.Size, vertexOffsetInVertices);
_indexBuffer.SetIndices(new IntPtr(cmd_list->IdxBuffer.Data), IndexFormat.UInt16, sizeof(ushort), cmd_list->IdxBuffer.Size, indexOffsetInElements);
vertexOffsetInVertices += cmd_list->VtxBuffer.Size;
indexOffsetInElements += cmd_list->IdxBuffer.Size;
}
// Setup orthographic projection matrix into our constant buffer
{
var io = ImGui.GetIO();
Matrix4x4 mvp = Matrix4x4.CreateOrthographicOffCenter(
0f,
io.DisplaySize.X,
io.DisplaySize.Y,
0.0f,
-1.0f,
1.0f);
_projectionMatrixProvider.Data = mvp;
}
BlendState previousBlendState = rc.BlendState;
rc.SetBlendState(_blendState);
rc.SetDepthStencilState(_depthDisabledState);
RasterizerState previousRasterizerState = rc.RasterizerState;
rc.SetRasterizerState(_rasterizerState);
rc.SetVertexBuffer(_vertexBuffer);
rc.SetIndexBuffer(_indexBuffer);
rc.SetMaterial(_material);
ImGui.ScaleClipRects(draw_data, ImGui.GetIO().DisplayFramebufferScale);
// Render command lists
int vtx_offset = 0;
int idx_offset = 0;
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
DrawList *cmd_list = draw_data->CmdLists[n];
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
DrawCmd *pcmd = &(((DrawCmd *)cmd_list->CmdBuffer.Data)[cmd_i]);
if (pcmd->UserCallback != IntPtr.Zero)
{
throw new NotImplementedException();
}
else
{
if (pcmd->TextureId != IntPtr.Zero)
{
if (pcmd->TextureId == new IntPtr(_fontAtlasID))
{
_material.UseTexture(0, _fontTextureBinding);
}
else
{
ShaderTextureBinding binding = ImGuiImageHelper.GetShaderTextureBinding(pcmd->TextureId);
_material.UseTexture(0, binding);
}
}
// TODO: This doesn't take into account viewport coordinates.
rc.SetScissorRectangle(
(int)pcmd->ClipRect.X,
(int)pcmd->ClipRect.Y,
(int)pcmd->ClipRect.Z,
(int)pcmd->ClipRect.W);
rc.DrawIndexedPrimitives((int)pcmd->ElemCount, idx_offset, vtx_offset);
}
idx_offset += (int)pcmd->ElemCount;
}
vtx_offset += cmd_list->VtxBuffer.Size;
}
rc.ClearScissorRectangle();
rc.SetBlendState(previousBlendState);
rc.SetDepthStencilState(rc.DefaultDepthStencilState);
rc.SetRasterizerState(previousRasterizerState);
}
public FontBatch3D FontBatch(BitmapFont font, int layer = 0, DepthStencilState depthStencilState = null, RasterizerState rasterizerState = null, BlendState blendState = null, SamplerState samplerState = null)
{
depthStencilState = (depthStencilState ?? DepthStencilState.Default);
rasterizerState = (rasterizerState ?? RasterizerState.CullNoneScissor);
blendState = (blendState ?? BlendState.AlphaBlend);
samplerState = (samplerState ?? SamplerState.LinearClamp);
return(FindFontBatch(font, layer, depthStencilState, rasterizerState, blendState, samplerState));
}
public FlatBatch3D FlatBatch(int layer = 0, DepthStencilState depthStencilState = null, RasterizerState rasterizerState = null, BlendState blendState = null)
{
depthStencilState = (depthStencilState ?? DepthStencilState.Default);
rasterizerState = (rasterizerState ?? RasterizerState.CullNoneScissor);
blendState = (blendState ?? BlendState.AlphaBlend);
return(FindFlatBatch(layer, depthStencilState, rasterizerState, blendState));
}
public TexturedBatch3D TexturedBatch(Texture2D texture, bool useAlphaTest = false, int layer = 0, DepthStencilState depthStencilState = null, RasterizerState rasterizerState = null, BlendState blendState = null, SamplerState samplerState = null)
{
depthStencilState = (depthStencilState ?? DepthStencilState.Default);
rasterizerState = (rasterizerState ?? RasterizerState.CullNoneScissor);
blendState = (blendState ?? BlendState.AlphaBlend);
samplerState = (samplerState ?? SamplerState.LinearClamp);
return(FindTexturedBatch(texture, useAlphaTest, layer, depthStencilState, rasterizerState, blendState, samplerState));
}