void LateUpdate()
{
last_start = stopwatch.Elapsed.TotalSeconds;
if (drawDebugWindow)
{
DrawDebugWindow();
}
ImGui.EndFrame();
if (queue_font_rebuild)
{
RebuildFonts();
queue_font_rebuild = false;
}
// custom cursors
if (enableCustomCursors)
{
ImGuiMouseCursor cursor = ImGui.GetMouseCursor();
Texture2D cursorTex = null;
Vector2 hotspot = cursorHotspot;
switch (cursor)
{
case ImGuiMouseCursor.Arrow:
cursorTex = customCursorArrow;
break;
case ImGuiMouseCursor.TextInput:
cursorTex = customCursorTextInput;
break;
case ImGuiMouseCursor.ResizeEW:
cursorTex = customCursorResizeEW;
break;
case ImGuiMouseCursor.ResizeNESW:
cursorTex = customCursorResizeNESW;
hotspot.x += 5; hotspot.y += 5;
break;
case ImGuiMouseCursor.ResizeNS:
cursorTex = customCursorResizeNS;
break;
case ImGuiMouseCursor.ResizeNWSE:
cursorTex = customCursorResizeNWSE;
hotspot.x += 5; hotspot.y += 5;
break;
default:
break;
}
// Don't set cursor if it has not actually changed
if (currentCursorTex != cursorTex)
{
if (cursorTex != null)
{
Cursor.SetCursor(cursorTex, hotspot, CursorMode.Auto);
}
else
{
Cursor.SetCursor(null, cursorHotspot, CursorMode.Auto);
}
currentCursorTex = cursorTex;
}
}
ImGui.Render();
// render ImGui
ImDrawDataPtr data = ImGui.GetDrawData();
if (commandBuffer != null)
{
// Clear buffer regardless of whether we have something to render or not
commandBuffer.Clear();
}
// Don't update meshes and Command Buffers if there is nothing to render
if (data.CmdListsCount > 0)
{
// resize meshes array
int numDrawCommands = 0;
for (int i = 0; i < data.CmdListsCount; i++)
{
ImDrawListPtr cmdList = data.getDrawListPtr(i);
var cmdBuffer = cmdList.CmdBuffer;
numDrawCommands += cmdBuffer.Size;
}
if (meshes == null)
{
meshes = new List <ImGuiMesh>();
}
if (meshes.Count != numDrawCommands)
{
// add new meshes to list if needed
for (int i = meshes.Count; i < numDrawCommands; i++)
{
ImGuiMesh mesh = new ImGuiMesh();
meshes.Add(mesh);
}
// delete extra meshes if needed
for (int i = meshes.Count - 1; i >= numDrawCommands; i--)
{
Destroy(meshes[i].mesh);
meshes.RemoveAt(i);
}
}
if (commandBuffer == null)
{
commandBuffer = new CommandBuffer();
commandBuffer.name = "ImGui Renderer";
commandBuffer.SetRenderTarget(BuiltinRenderTextureType.CameraTarget);
guiCamera.AddCommandBuffer(CameraEvent.AfterEverything, commandBuffer);
}
commandBuffer.SetRenderTarget(BuiltinRenderTextureType.CameraTarget);
// orthogonal projection of GUI mesh to camera space
Matrix4x4 matrix = Matrix4x4.Ortho(0, Screen.width, 0, Screen.height, 0, 0.1f);
// negate world to camera transform and projection which Unity applies itself
matrix = guiCamera.cameraToWorldMatrix * guiCamera.projectionMatrix.inverse * matrix;
// update Command Buffers
int count = 0;
for (int i = 0; i < data.CmdListsCount; i++)
{
ImDrawListPtr cmdList = data.getDrawListPtr(i);
var cmdBuffer = cmdList.CmdBuffer;
uint startElement = 0;
for (int j = 0; j < cmdBuffer.Size; j++)
{
ImDrawCmd cmd = cmdBuffer[j];
Rect rect = new Rect
{
min = new Vector2(cmd.ClipRect.x, Screen.height - cmd.ClipRect.y),
max = new Vector2(cmd.ClipRect.z, Screen.height - cmd.ClipRect.w)
};
commandBuffer.EnableScissorRect(rect);
meshes[count].UpdateMesh(cmd, cmdList.IdxBuffer, cmdList.VtxBuffer, (int)startElement);
if (cmd.TextureId == fontTexturePtr)
{
mpb.SetTexture(main_tex_id, fontTexture);
commandBuffer.DrawMesh(meshes[count].mesh, matrix, material, 0, 0, mpb);
}
else if (textures.ContainsKey(cmd.TextureId))
{
mpb.SetTexture(main_tex_id, textures[cmd.TextureId]);
commandBuffer.DrawMesh(meshes[count].mesh, matrix, material, 0, 0, mpb);
}
else
{
Debug.LogWarning("Image texture missing!");
}
startElement += cmd.ElemCount;
count++;
}
}
}
else if (commandBuffer != null)
{
// Remove Command Buffer if there is nothing to render
guiCamera.RemoveCommandBuffer(CameraEvent.AfterEverything, commandBuffer);
commandBuffer = null;
}
textures.Clear();
last_end = stopwatch.Elapsed.TotalSeconds;
}
