public static unsafe void render(BasicEffect effect)
{
IO io = ImGui.GetIO();
ImGui.Render();
DrawData *draw_data = ImGui.GetDrawData();
var graphicsDevice = _game.GraphicsDevice;
graphicsDevice.DepthStencilState = DepthStencilState.None;
graphicsDevice.RasterizerState = new RasterizerState()
{
ScissorTestEnable = true, CullMode = CullMode.None
};
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.BlendState = BlendState.AlphaBlend;
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
ImGui.ScaleClipRects(draw_data, io.DisplayFramebufferScale);
//var effect = Assets.defaultEffect;
//effect.Texture = Assets.dummyTexture;
effect.World = Matrix.Identity;
effect.View = Matrix.Identity;// camera.viewMatrix3D;
effect.Projection =
Matrix.CreateOrthographicOffCenter(
0.0f,
io.DisplaySize.X / io.DisplayFramebufferScale.X,
io.DisplaySize.Y / io.DisplayFramebufferScale.Y,
0.0f,
-1.0f,
1.0f
);
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
NativeDrawList *cmd_list = draw_data->CmdLists[n];
DrawVert * vtx_buffer = (DrawVert *)cmd_list->VtxBuffer.Data;
ushort * idx_buffer = (ushort *)cmd_list->IdxBuffer.Data;
var vertexElements = cmd_list->VtxBuffer.Size;
var indexElements = cmd_list->IdxBuffer.Size;
var idxPos = 0;
if (vertices.Length < vertexElements)
{
vertices = new ImGuiVertex[vertexElements / 2 * 3];
_vertexBuffer.Dispose();
_vertexBuffer = new VertexBuffer(graphicsDevice, ImGuiVertex.VertexDeclaration, vertices.Length, BufferUsage.WriteOnly);
}
for (int i = 0; i < vertexElements; i++)
{
DrawVert vert = *vtx_buffer++;
vertices[i].x = vert.pos.X;
vertices[i].y = vert.pos.Y;
vertices[i].tx = vert.uv.X;
vertices[i].ty = vert.uv.Y;
vertices[i].color = vert.col;
}
_vertexBuffer.SetData(vertices, 0, vertexElements);
if (indices.Length < indexElements)
{
indices = new short[indexElements / 2 * 3];
_indexBuffer.Dispose();
_indexBuffer = new IndexBuffer(graphicsDevice, IndexElementSize.SixteenBits, indices.Length, BufferUsage.WriteOnly);
}
for (int i = 0; i < indexElements; i++)
{
indices[i] = (short)idx_buffer[i];
}
_indexBuffer.SetData(indices, 0, indexElements);
graphicsDevice.Indices = _indexBuffer;
graphicsDevice.SetVertexBuffer(_vertexBuffer);
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
{
graphicsDevice.ScissorRectangle = new Rectangle((int)pcmd->ClipRect.X, (int)pcmd->ClipRect.Y, (int)(pcmd->ClipRect.Z - pcmd->ClipRect.X), (int)(pcmd->ClipRect.W - pcmd->ClipRect.Y));
if (pcmd->TextureId.ToInt32() == fontTexture.GetHashCode())
{
effect.Texture = fontTexture;
}
else
{
throw new NotImplementedException();
}
var primivites = (int)pcmd->ElemCount / 3;
foreach (var pass in effect.CurrentTechnique.Passes)
{
pass.Apply();
graphicsDevice.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, idxPos, primivites);
//graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleList, vertices, 0, vertexElements, indices, 0, indexElements / 3);
}
}
idxPos += (int)pcmd->ElemCount;
}
}
}
private unsafe void RenderImDrawData(DrawData *draw_data)
{
// Rendering
int display_w, display_h;
display_w = Application.GetWindow().GetWidth();
display_h = Application.GetWindow().GetHeight();
var clear_color = new System.Numerics.Vector4(114f / 255f, 144f / 255f, 154f / 255f, 1.0f);
GL.Viewport(0, 0, display_w, display_h);
GL.ClearColor(clear_color.X, clear_color.Y, clear_color.Z, clear_color.W);
GL.Clear(ClearBufferMask.ColorBufferBit);
// We are using the OpenGL fixed pipeline to make the example code simpler to read!
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
int last_texture;
GL.GetInteger(GetPName.TextureBinding2D, out last_texture);
GL.PushAttrib(AttribMask.EnableBit | AttribMask.ColorBufferBit | AttribMask.TransformBit);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.Disable(EnableCap.CullFace);
GL.Disable(EnableCap.DepthTest);
GL.Enable(EnableCap.ScissorTest);
GL.EnableClientState(ArrayCap.VertexArray);
GL.EnableClientState(ArrayCap.TextureCoordArray);
GL.EnableClientState(ArrayCap.ColorArray);
GL.Enable(EnableCap.Texture2D);
GL.UseProgram(0);
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
IO io = ImGui.GetIO();
ImGui.ScaleClipRects(draw_data, io.DisplayFramebufferScale);
// Setup orthographic projection matrix
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadIdentity();
GL.Ortho(
0.0f,
io.DisplaySize.X / io.DisplayFramebufferScale.X,
io.DisplaySize.Y / io.DisplayFramebufferScale.Y,
0.0f,
-1.0f,
1.0f);
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadIdentity();
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
DrawList *cmd_list = draw_data->CmdLists[n];
byte * vtx_buffer = (byte *)cmd_list->VtxBuffer.Data;
ushort * idx_buffer = (ushort *)cmd_list->IdxBuffer.Data;
DrawVert vert0 = *((DrawVert *)vtx_buffer);
DrawVert vert1 = *(((DrawVert *)vtx_buffer) + 1);
DrawVert vert2 = *(((DrawVert *)vtx_buffer) + 2);
GL.VertexPointer(2, VertexPointerType.Float, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.PosOffset));
GL.TexCoordPointer(2, TexCoordPointerType.Float, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.UVOffset));
GL.ColorPointer(4, ColorPointerType.UnsignedByte, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.ColOffset));
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
{
GL.BindTexture(TextureTarget.Texture2D, pcmd->TextureId.ToInt32());
GL.Scissor(
(int)pcmd->ClipRect.X,
(int)(io.DisplaySize.Y - pcmd->ClipRect.W),
(int)(pcmd->ClipRect.Z - pcmd->ClipRect.X),
(int)(pcmd->ClipRect.W - pcmd->ClipRect.Y));
ushort[] indices = new ushort[pcmd->ElemCount];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = idx_buffer[i];
}
GL.DrawElements(PrimitiveType.Triangles, (int)pcmd->ElemCount, DrawElementsType.UnsignedShort, new IntPtr(idx_buffer));
}
idx_buffer += pcmd->ElemCount;
}
}
// Restore modified state
GL.DisableClientState(ArrayCap.ColorArray);
GL.DisableClientState(ArrayCap.TextureCoordArray);
GL.DisableClientState(ArrayCap.VertexArray);
GL.BindTexture(TextureTarget.Texture2D, last_texture);
GL.MatrixMode(MatrixMode.Modelview);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
GL.PopAttrib();
}
private static unsafe void RenderDrawData(DrawData *drawData, int displayW, int displayH)
{
if (!Engine.Get.RenderImGui)
{
return;
}
GL.Viewport(0, 0, displayW, displayH);
GL.GetInteger(GetPName.TextureBinding2D, out int last_texture);
GL.PushAttrib(AttribMask.EnableBit | AttribMask.ColorBufferBit | AttribMask.TransformBit);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Disable(EnableCap.CullFace);
GL.Disable(EnableCap.DepthTest);
GL.Enable(EnableCap.ScissorTest);
GL.EnableClientState(ArrayCap.VertexArray);
GL.EnableClientState(ArrayCap.TextureCoordArray);
GL.EnableClientState(ArrayCap.ColorArray);
GL.Enable(EnableCap.Texture2D);
GL.UseProgram(0);
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
IO io = ImGui.GetIO();
ImGui.ScaleClipRects(drawData, io.DisplayFramebufferScale);
// Setup orthographic projection matrix
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadIdentity();
GL.Ortho(
0.0f,
io.DisplaySize.X / io.DisplayFramebufferScale.X,
io.DisplaySize.Y / io.DisplayFramebufferScale.Y,
0.0f,
-1.0f,
1.0f);
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadIdentity();
// Render command lists
for (int n = 0; n < drawData->CmdListsCount; n++)
{
NativeDrawList *cmd_list = drawData->CmdLists[n];
byte * vtx_buffer = (byte *)cmd_list->VtxBuffer.Data;
ushort * idx_buffer = (ushort *)cmd_list->IdxBuffer.Data;
DrawVert vert0 = *((DrawVert *)vtx_buffer);
DrawVert vert1 = *(((DrawVert *)vtx_buffer) + 1);
DrawVert vert2 = *(((DrawVert *)vtx_buffer) + 2);
GL.VertexPointer(2, VertexPointerType.Float, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.PosOffset));
GL.TexCoordPointer(2, TexCoordPointerType.Float, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.UVOffset));
GL.ColorPointer(4, ColorPointerType.UnsignedByte, sizeof(DrawVert), new IntPtr(vtx_buffer + DrawVert.ColOffset));
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
{
GL.BindTexture(TextureTarget.Texture2D, pcmd->TextureId.ToInt32());
GL.Scissor(
(int)pcmd->ClipRect.X,
(int)(io.DisplaySize.Y - pcmd->ClipRect.W),
(int)(pcmd->ClipRect.Z - pcmd->ClipRect.X),
(int)(pcmd->ClipRect.W - pcmd->ClipRect.Y));
ushort[] indices = new ushort[pcmd->ElemCount];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = idx_buffer[i];
}
GL.DrawElements(PrimitiveType.Triangles, (int)pcmd->ElemCount, DrawElementsType.UnsignedShort, new IntPtr(idx_buffer));
}
idx_buffer += pcmd->ElemCount;
}
}
// Restore modified state
GL.DisableClientState(ArrayCap.ColorArray);
GL.DisableClientState(ArrayCap.TextureCoordArray);
GL.DisableClientState(ArrayCap.VertexArray);
GL.BindTexture(TextureTarget.Texture2D, last_texture);
GL.MatrixMode(MatrixMode.Modelview);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
GL.PopAttrib();
}
