private static void IGRender2(ImDrawDataPtr dd)
{
if (dd.CmdListsCount == 0)
{
return;
}
for (int i = 0; i < dd.CmdListsCount; i++)
{
ImDrawListPtr cmd_list = dd.CmdListsRange[i];
int vertexSize = cmd_list.VtxBuffer.Size * Unsafe.SizeOf <ImDrawVert>();
if (vertexSize > VtxBufSize)
{
int newSize = (int)Math.Max(VtxBufSize * 1.5f, vertexSize);
GL.NamedBufferData(VertexBuffer, newSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
VtxBufSize = newSize;
}
int indexSize = cmd_list.IdxBuffer.Size * sizeof(ushort);
if (indexSize > IdxBufSize)
{
int newSize = (int)Math.Max(IdxBufSize * 1.5f, indexSize);
GL.NamedBufferData(IndexBuffer, newSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
IdxBufSize = newSize;
}
}
var io = ImGui.GetIO();
var MVP = Matrix4.CreateOrthographicOffCenter(0.0f, Engine.Width, Engine.Height, 0.0f, -1.0f, 1.0f);
ImGuiProgram.Use();
ImGuiProgram.UniformMatrix4("Projection", ref MVP);
GL.Uniform1(ImGuiProgram.UniformLocation("Texture"), 0);
IG_VAO.Bind();
dd.ScaleClipRects(io.DisplayFramebufferScale);
GL.Enable(EnableCap.Blend);
GL.Enable(EnableCap.ScissorTest);
GL.BlendEquation(BlendEquationMode.FuncAdd);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.Disable(EnableCap.CullFace);
GL.Disable(EnableCap.DepthTest);
for (int n = 0; n < dd.CmdListsCount; n++)
{
ImDrawListPtr cmdList = dd.CmdListsRange[n];
GL.NamedBufferSubData(VertexBuffer, IntPtr.Zero, cmdList.VtxBuffer.Size * Unsafe.SizeOf <ImDrawVert>(), cmdList.VtxBuffer.Data);
GL.NamedBufferSubData(IndexBuffer, IntPtr.Zero, cmdList.IdxBuffer.Size * sizeof(ushort), cmdList.IdxBuffer.Data);
int vOffset = 0;
int iOffset = 0;
for (int i = 0; i < cmdList.CmdBuffer.Size; i++)
{
ImDrawCmdPtr pcmd = cmdList.CmdBuffer[i];
if (pcmd.UserCallback != IntPtr.Zero)
{
throw new NotImplementedException();
}
else
{
GLTexture.Active(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, (int)pcmd.TextureId);
var clip = pcmd.ClipRect;
GL.Scissor((int)clip.X, Engine.Height - (int)clip.W, (int)(clip.Z - clip.X), (int)(clip.W - clip.Y));
if ((io.BackendFlags & ImGuiBackendFlags.RendererHasVtxOffset) != 0)
{
GL.DrawElementsBaseVertex(PrimitiveType.Triangles, (int)pcmd.ElemCount, DrawElementsType.UnsignedShort, (IntPtr)(iOffset * sizeof(ushort)), vOffset);
}
else
{
GL.DrawElements(BeginMode.Triangles, (int)pcmd.ElemCount, DrawElementsType.UnsignedShort, (int)pcmd.IdxOffset * sizeof(ushort));
}
}
iOffset += (int)pcmd.ElemCount;
}
vOffset += cmdList.VtxBuffer.Size;
}
GL.Disable(EnableCap.Blend);
GL.Disable(EnableCap.ScissorTest);
}
public static unsafe void Initialise()
{
GL.LoadBindings(new SDLBindingsContext());
Context = ImGui.CreateContext();
ImGui.SetCurrentContext(Context);
var io = ImGui.GetIO();
io.DisplaySize.X = Engine.Width;
io.DisplaySize.Y = Engine.Height;
io.KeyMap[(int)ImGuiKey.Tab] = (int)SC.SDL_SCANCODE_TAB;
io.KeyMap[(int)ImGuiKey.LeftArrow] = (int)SC.SDL_SCANCODE_LEFT;
io.KeyMap[(int)ImGuiKey.RightArrow] = (int)SC.SDL_SCANCODE_RIGHT;
io.KeyMap[(int)ImGuiKey.UpArrow] = (int)SC.SDL_SCANCODE_UP;
io.KeyMap[(int)ImGuiKey.DownArrow] = (int)SC.SDL_SCANCODE_DOWN;
io.KeyMap[(int)ImGuiKey.PageUp] = (int)SC.SDL_SCANCODE_PAGEUP;
io.KeyMap[(int)ImGuiKey.PageDown] = (int)SC.SDL_SCANCODE_PAGEDOWN;
io.KeyMap[(int)ImGuiKey.Home] = (int)SC.SDL_SCANCODE_HOME;
io.KeyMap[(int)ImGuiKey.End] = (int)SC.SDL_SCANCODE_END;
io.KeyMap[(int)ImGuiKey.Insert] = (int)SC.SDL_SCANCODE_INSERT;
io.KeyMap[(int)ImGuiKey.Delete] = (int)SC.SDL_SCANCODE_DELETE;
io.KeyMap[(int)ImGuiKey.Backspace] = (int)SC.SDL_SCANCODE_BACKSPACE;
io.KeyMap[(int)ImGuiKey.Space] = (int)SC.SDL_SCANCODE_SPACE;
io.KeyMap[(int)ImGuiKey.Enter] = (int)SC.SDL_SCANCODE_RETURN;
io.KeyMap[(int)ImGuiKey.Escape] = (int)SC.SDL_SCANCODE_ESCAPE;
io.KeyMap[(int)ImGuiKey.KeyPadEnter] = (int)SC.SDL_SCANCODE_KP_ENTER;
io.KeyMap[(int)ImGuiKey.A] = (int)SC.SDL_SCANCODE_A;
io.KeyMap[(int)ImGuiKey.C] = (int)SC.SDL_SCANCODE_C;
io.KeyMap[(int)ImGuiKey.V] = (int)SC.SDL_SCANCODE_V;
io.KeyMap[(int)ImGuiKey.X] = (int)SC.SDL_SCANCODE_X;
io.KeyMap[(int)ImGuiKey.Y] = (int)SC.SDL_SCANCODE_Y;
io.KeyMap[(int)ImGuiKey.Z] = (int)SC.SDL_SCANCODE_Z;
var maj = GL.GetInteger(GetPName.MajorVersion);
var min = GL.GetInteger(GetPName.MinorVersion);
Log.Info($"OpenGLManager: This appears to be OpenGL {maj}.{min}.");
VtxBufSize = 10000;
IdxBufSize = 2000;
IG_VAO = new("ImGui");
IG_VAO.Bind();
VertexSource = File.ReadAllText("EngineResources/2D.vert");
FragSource = File.ReadAllText("EngineResources/standard.frag");
VS = new GLShader(VertexSource, GLShaderType.VERTEX);
FS = new GLShader(FragSource, GLShaderType.FRAGMENT);
VS.Compile();
FS.Compile();
ImGuiProgram = new GLShaderProgram().Attach(VS).Attach(FS).Link();
GLHelper.VertexBuffer("ImGui VBO", out VertexBuffer);
GLHelper.ElementBuffer("ImGui EBO", out IndexBuffer);
GL.NamedBufferData(VertexBuffer, VtxBufSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
GL.NamedBufferData(IndexBuffer, IdxBufSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
var va = IG_VAO.GLObject;
GL.VertexArrayVertexBuffer(va, 0, VertexBuffer, IntPtr.Zero, Unsafe.SizeOf <ImDrawVert>());
GL.VertexArrayElementBuffer(va, IndexBuffer);
GL.EnableVertexArrayAttrib(va, 0);
GL.VertexArrayAttribBinding(va, 0, 0);
GL.VertexArrayAttribFormat(va, 0, 2, VertexAttribType.Float, false, 0);
GL.EnableVertexArrayAttrib(va, 1);
GL.VertexArrayAttribBinding(va, 1, 0);
GL.VertexArrayAttribFormat(va, 1, 2, VertexAttribType.Float, false, 8);
GL.EnableVertexArrayAttrib(va, 2);
GL.VertexArrayAttribBinding(va, 2, 0);
GL.VertexArrayAttribFormat(va, 2, 4, VertexAttribType.UnsignedByte, true, 16);
Initialised = true;
OnInitGL?.Invoke();
}
public static unsafe void Initialise()
{
GL.LoadBindings(new SDLBindingsContext());
Context = ImGui.CreateContext();
ImGui.SetCurrentContext(Context);
ImGuizmo.SetImGuiContext(Context);
var io = ImGui.GetIO();
GL.Enable(EnableCap.DebugOutput);
GL.Enable(EnableCap.DebugOutputSynchronous);
GL.DebugMessageCallback(_DebugCb, IntPtr.Zero);
io.DisplaySize.X = Engine.Width;
io.DisplaySize.Y = Engine.Height;
io.KeyMap[(int)ImGuiKey.Tab] = (int)SC.SDL_SCANCODE_TAB;
io.KeyMap[(int)ImGuiKey.LeftArrow] = (int)SC.SDL_SCANCODE_LEFT;
io.KeyMap[(int)ImGuiKey.RightArrow] = (int)SC.SDL_SCANCODE_RIGHT;
io.KeyMap[(int)ImGuiKey.UpArrow] = (int)SC.SDL_SCANCODE_UP;
io.KeyMap[(int)ImGuiKey.DownArrow] = (int)SC.SDL_SCANCODE_DOWN;
io.KeyMap[(int)ImGuiKey.PageUp] = (int)SC.SDL_SCANCODE_PAGEUP;
io.KeyMap[(int)ImGuiKey.PageDown] = (int)SC.SDL_SCANCODE_PAGEDOWN;
io.KeyMap[(int)ImGuiKey.Home] = (int)SC.SDL_SCANCODE_HOME;
io.KeyMap[(int)ImGuiKey.End] = (int)SC.SDL_SCANCODE_END;
io.KeyMap[(int)ImGuiKey.Insert] = (int)SC.SDL_SCANCODE_INSERT;
io.KeyMap[(int)ImGuiKey.Delete] = (int)SC.SDL_SCANCODE_DELETE;
io.KeyMap[(int)ImGuiKey.Backspace] = (int)SC.SDL_SCANCODE_BACKSPACE;
io.KeyMap[(int)ImGuiKey.Space] = (int)SC.SDL_SCANCODE_SPACE;
io.KeyMap[(int)ImGuiKey.Enter] = (int)SC.SDL_SCANCODE_RETURN;
io.KeyMap[(int)ImGuiKey.Escape] = (int)SC.SDL_SCANCODE_ESCAPE;
io.KeyMap[(int)ImGuiKey.KeyPadEnter] = (int)SC.SDL_SCANCODE_KP_ENTER;
io.KeyMap[(int)ImGuiKey.A] = (int)SC.SDL_SCANCODE_A;
io.KeyMap[(int)ImGuiKey.C] = (int)SC.SDL_SCANCODE_C;
io.KeyMap[(int)ImGuiKey.V] = (int)SC.SDL_SCANCODE_V;
io.KeyMap[(int)ImGuiKey.X] = (int)SC.SDL_SCANCODE_X;
io.KeyMap[(int)ImGuiKey.Y] = (int)SC.SDL_SCANCODE_Y;
io.KeyMap[(int)ImGuiKey.Z] = (int)SC.SDL_SCANCODE_Z;
var maj = GL.GetInteger(GetPName.MajorVersion);
var min = GL.GetInteger(GetPName.MinorVersion);
Log.Info($"OpenGLManager: This appears to be OpenGL {maj}.{min}.");
var t = new GLVersion()
{
Major = maj,
Minor = min,
VersionString = $"{maj}.{min}"
};
Version = t;
if (Version.Major < 4 || (Version.Major == 4 && Version.Minor < 5))
{
// This is not OpenGL 4.5 or higher.
Log.Fatal("This version of OpenGL is too old! Luminal applications require at least GL 4.5.");
Log.Fatal("Showing message box and exiting.");
MessageBox.Error("Sorry, applications built with Luminal cannot run on your graphics card.\n" +
$"Your graphics card only supports OpenGL {Version.VersionString}, and at least OpenGL 4.5 is required.",
"Engine incompatible: OpenGL version too old");
Engine.Quit(1);
}
VtxBufSize = 10000;
IdxBufSize = 2000;
IG_VAO = new("ImGui");
IG_VAO.Bind();
VertexSource = File.ReadAllText("EngineResources/Shaders/2D/2D.vert");
FragSource = File.ReadAllText("EngineResources/Shaders/2D/2D.frag");
VS = new GLShader(VertexSource, GLShaderType.Vertex);
FS = new GLShader(FragSource, GLShaderType.Fragment);
VS.Compile();
FS.Compile();
ImGuiProgram = new GLShaderProgram().Attach(VS).Attach(FS).Link();
GLHelper.VertexBuffer("ImGui VBO", out VertexBuffer);
GLHelper.ElementBuffer("ImGui EBO", out IndexBuffer);
GL.NamedBufferData(VertexBuffer, VtxBufSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
GL.NamedBufferData(IndexBuffer, IdxBufSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
var va = IG_VAO.GLObject;
GL.VertexArrayVertexBuffer(va, 0, VertexBuffer, IntPtr.Zero, Unsafe.SizeOf <ImDrawVert>());
GL.VertexArrayElementBuffer(va, IndexBuffer);
GL.EnableVertexArrayAttrib(va, 0);
GL.VertexArrayAttribBinding(va, 0, 0);
GL.VertexArrayAttribFormat(va, 0, 2, VertexAttribType.Float, false, 0);
GL.EnableVertexArrayAttrib(va, 1);
GL.VertexArrayAttribBinding(va, 1, 0);
GL.VertexArrayAttribFormat(va, 1, 2, VertexAttribType.Float, false, 8);
GL.EnableVertexArrayAttrib(va, 2);
GL.VertexArrayAttribBinding(va, 2, 0);
GL.VertexArrayAttribFormat(va, 2, 4, VertexAttribType.UnsignedByte, true, 16);
_SetClipboard = SetClipboard;
io.SetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_SetClipboard);
_GetClipboard = GetClipboard;
io.GetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_GetClipboard);
Initialised = true;
OnInitGL?.Invoke();
}