128 lines
5.4 KiB
C#
128 lines
5.4 KiB
C#
using System;
|
|
using System.Numerics;
|
|
using System.Text;
|
|
using System.Linq;
|
|
using ImGuiNET;
|
|
using OpenTK.Graphics.OpenGL;
|
|
using OpenTK.Windowing.GraphicsLibraryFramework;
|
|
|
|
namespace Pow3r
|
|
{
|
|
internal sealed unsafe partial class Program
|
|
{
|
|
private int _glFontTexture;
|
|
|
|
private void InitOpenGL()
|
|
{
|
|
if (GL.GetString(StringName.Extensions).Split(' ').Contains("GL_ARB_debug_output"))
|
|
GL.Arb.DebugMessageCallback(GLDebugCallbackDelegate, 0x0105);
|
|
|
|
GL.Enable(EnableCap.ScissorTest);
|
|
GL.Enable(EnableCap.Blend);
|
|
GL.BlendEquation(BlendEquationMode.FuncAdd);
|
|
GL.BlendFuncSeparate(
|
|
BlendingFactorSrc.SrcAlpha,
|
|
BlendingFactorDest.OneMinusSrcAlpha,
|
|
BlendingFactorSrc.One,
|
|
BlendingFactorDest.OneMinusSrcAlpha);
|
|
|
|
var io = ImGui.GetIO();
|
|
|
|
io.Fonts.GetTexDataAsRGBA32(out byte* pixels, out var width, out var height, out _);
|
|
|
|
_glFontTexture = GL.GenTexture();
|
|
GL.BindTexture(TextureTarget.Texture2D, _glFontTexture);
|
|
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Bgra, PixelType.UnsignedByte, (nint) pixels);
|
|
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int) TextureMagFilter.Nearest);
|
|
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.Nearest);
|
|
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) TextureWrapMode.ClampToEdge);
|
|
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) TextureWrapMode.ClampToEdge);
|
|
|
|
/*
|
|
GL.TextureParameter(_fontTexture, TextureParameterName.TextureSwizzleR, 1);
|
|
GL.TextureParameter(_fontTexture, TextureParameterName.TextureSwizzleG, 1);
|
|
GL.TextureParameter(_fontTexture, TextureParameterName.TextureSwizzleB, 1);
|
|
GL.TextureParameter(_fontTexture, TextureParameterName.TextureSwizzleA, (int) All.Red);*/
|
|
|
|
io.Fonts.SetTexID(_glFontTexture);
|
|
io.Fonts.ClearTexData();
|
|
}
|
|
|
|
private void RenderOpenGL()
|
|
{
|
|
GLFW.GetFramebufferSize(_window.WindowPtr, out var fbW, out var fbH);
|
|
GL.Viewport(0, 0, fbW, fbH);
|
|
GL.Disable(EnableCap.ScissorTest);
|
|
GL.ClearColor(0, 0, 0, 1);
|
|
GL.Clear(ClearBufferMask.ColorBufferBit);
|
|
GL.Enable(EnableCap.ScissorTest);
|
|
GL.Enable(EnableCap.Texture2D);
|
|
|
|
var drawData = ImGui.GetDrawData();
|
|
|
|
var l = drawData.DisplayPos.X;
|
|
var r = drawData.DisplayPos.X + drawData.DisplaySize.X;
|
|
var t = drawData.DisplayPos.Y;
|
|
var b = drawData.DisplayPos.Y + drawData.DisplaySize.Y;
|
|
|
|
var matrix = Matrix4x4.CreateOrthographicOffCenter(l, r, b, t, -1, 1);
|
|
|
|
GL.MatrixMode(MatrixMode.Projection);
|
|
GL.LoadMatrix((float*) &matrix);
|
|
|
|
var clipOff = drawData.DisplayPos;
|
|
var clipScale = drawData.FramebufferScale;
|
|
|
|
GL.EnableClientState(ArrayCap.VertexArray);
|
|
GL.EnableClientState(ArrayCap.TextureCoordArray);
|
|
GL.EnableClientState(ArrayCap.ColorArray);
|
|
|
|
for (var n = 0; n < drawData.CmdListsCount; n++)
|
|
{
|
|
var drawList = drawData.CmdListsRange[n];
|
|
|
|
for (var cmdI = 0; cmdI < drawList.CmdBuffer.Size; cmdI++)
|
|
{
|
|
var cmd = drawList.CmdBuffer[cmdI];
|
|
|
|
GL.BindTexture(TextureTarget.Texture2D, (uint) cmd.TextureId);
|
|
|
|
Vector4 clipRect = default;
|
|
clipRect.X = (cmd.ClipRect.X - clipOff.X) * clipScale.X;
|
|
clipRect.Y = (cmd.ClipRect.Y - clipOff.Y) * clipScale.Y;
|
|
clipRect.Z = (cmd.ClipRect.Z - clipOff.X) * clipScale.X;
|
|
clipRect.W = (cmd.ClipRect.W - clipOff.Y) * clipScale.Y;
|
|
|
|
GL.Scissor((int) clipRect.X, (int) (fbH - clipRect.W), (int) (clipRect.Z - clipRect.X),
|
|
(int) (clipRect.W - clipRect.Y));
|
|
|
|
IntPtr adjustedVB = drawList.VtxBuffer.Data + (nint) (sizeof(ImDrawVert) * cmd.VtxOffset);
|
|
|
|
GL.VertexPointer(2, VertexPointerType.Float, sizeof(ImDrawVert), adjustedVB);
|
|
GL.TexCoordPointer(2, TexCoordPointerType.Float, sizeof(ImDrawVert), adjustedVB + 8);
|
|
GL.ColorPointer(4, ColorPointerType.UnsignedByte, sizeof(ImDrawVert), adjustedVB + 16);
|
|
|
|
GL.DrawElements(PrimitiveType.Triangles, (int) cmd.ElemCount,
|
|
DrawElementsType.UnsignedShort,
|
|
drawList.IdxBuffer.Data + (nint) (cmd.IdxOffset * 2));
|
|
}
|
|
}
|
|
|
|
_window.SwapBuffers();
|
|
}
|
|
|
|
private static readonly DebugProcArb GLDebugCallbackDelegate = GLDebugCallback;
|
|
|
|
private static void GLDebugCallback(DebugSource source, DebugType type, int id, DebugSeverity severity,
|
|
int length, IntPtr message, IntPtr userParam)
|
|
{
|
|
var msg = Encoding.UTF8.GetString((byte*) message, length);
|
|
|
|
if (severity == DebugSeverity.DebugSeverityNotification)
|
|
return;
|
|
|
|
Console.WriteLine($"[{type}][{severity}] {source}: {msg}");
|
|
}
|
|
}
|
|
}
|