Start of 3d renderer integration

2026-09-05 13:01:52 +00:00 · 2022-05-04 18:38:59 +02:00
parent 412d0ea965
commit 2817c5b1a1
16 changed files with 733 additions and 14 deletions
@@ -0,0 +1,246 @@
+using GlitchyEngine.Renderer;
+using GlitchyEngine;
+using ImGui;
+using GlitchyEngine.Math;
+using System;
+
+namespace GlitchyEditor
+{
+	class TextureViewer
+	{
+		enum BackgroundMode : int32
+		{
+			White,
+			Black,
+			Checkerboard
+		}
+
+		enum SampleMode : int32
+		{
+			Point,
+			Linear
+		}
+
+		GraphicsContext _context ~ _.ReleaseRef();
+
+		Effect _effect ~ _.ReleaseRef();
+
+		float _zoom = 1.0f;
+		
+		BackgroundMode _backgroundMode = .Checkerboard;
+
+		SampleMode _sampleMode = .Linear;
+
+		RenderTarget2D _target ~ _?.ReleaseRef();
+		// TODO: we don't need depth!
+		DepthStencilTarget _depth ~ _?.ReleaseRef();
+
+		SamplerState _samplerPoint ~ _.ReleaseRef();
+		SamplerState _samplerLinear ~ _.ReleaseRef();
+
+		public this()
+		{
+			_context = Renderer.[Friend]_context..AddRef();
+
+			InitEffect();
+			InitState();
+			// TODO: rasterizerstate and depthstencilstate
+		}
+
+		private void InitEffect()
+		{
+			_effect = new Effect("content\\Shaders\\textureViewerShader.hlsl");
+		}
+
+		private void InitState()
+		{
+			SamplerStateDescription desc = .();
+			desc.MagFilter = .Linear;
+			desc.MinFilter = .Linear;
+			_samplerLinear = SamplerStateManager.GetSampler(desc);
+			
+			desc.MagFilter = .Point;
+			desc.MinFilter = .Point;
+			_samplerPoint = SamplerStateManager.GetSampler(desc);
+		}
+
+		Vector2 _position;
+
+		bool _moving;
+
+		float _colorOffset = 0;
+		float _colorScale = 1;
+		float _alphaOffset = 0;
+		float _alphaScale = 1;
+
+		public void ViewTexture(Texture viewedTexture)
+		{
+			ImGui.Begin("Texture Viewer");
+
+			ImGui.SliderFloat("Zoom", &_zoom, 0.01f, 100.0f);
+
+			char8*[] items = scope .("White", "Black", "Checkerboard");
+
+			ImGui.Combo("Background", (.)&_backgroundMode, items.Ptr, (.)items.Count);
+			
+			items = scope .("Point", "Linear");
+
+			ImGui.Combo("Sampler", (.)&_sampleMode, items.Ptr, (.)items.Count);
+
+			ImGui.SliderFloat2("Color offset and scale", *(float[2]*)&_colorOffset, -1.0f, 1.0f);
+			ImGui.SliderFloat2("Alpha offset and scale", *(float[2]*)&_alphaOffset, -1.0f, 1.0f);
+
+			ImGui.SliderFloat2("Position", *(float[2]*)&_position, 2 * -Math.Max(viewedTexture.Width, viewedTexture.Height) * _zoom, 2 * Math.Max(viewedTexture.Width, viewedTexture.Height) * _zoom);
+
+			ImGui.BeginChild("imageChild");
+
+			UpdateInput();
+
+			var viewportSize = ImGui.GetContentRegionAvail();
+
+			viewportSize.x = Math.Max(viewportSize.x, 1);
+			viewportSize.y = Math.Max(viewportSize.y, 1);
+
+			if(_target == null || viewportSize.x != _target.Width || viewportSize.y != _target.Height)
+			{
+				_target?.ReleaseRef();
+				_target = new RenderTarget2D(.(.R8G8B8A8_UNorm, (.)viewportSize.x, (.)viewportSize.y));
+				_depth?.ReleaseRef();
+				_depth = new DepthStencilTarget((.)viewportSize.x, (.)viewportSize.y, .D16_UNorm);
+			}
+
+			RenderTexture(viewedTexture);
+
+			ImGui.Image(_target, viewportSize);
+
+			ImGui.EndChild();
+
+			ImGui.End();
+		}
+
+		float lastWheel;
+
+		private void UpdateInput()
+		{
+			var windowPos = ImGui.GetWindowPos();
+			var mousePos = ImGui.GetIO().MousePos;
+			Vector2 mouseInWindow = .(mousePos.x - windowPos.x, mousePos.y - windowPos.y);
+
+			bool windowHovered = ImGui.IsWindowHovered();
+
+			if(windowHovered && Input.IsMouseButtonPressing(.MiddleButton))
+			{
+				_moving = true;
+			}
+			else if(Input.IsMouseButtonReleased(.MiddleButton))
+			{
+				_moving = false;
+			}
+
+			if(windowHovered || _moving)
+			{
+				float mouseWheel = ImGui.GetIO().MouseWheel;
+
+				float delta = mouseWheel - lastWheel;
+
+				if(delta != 0)
+				{
+					_position -= mouseInWindow;
+					_position /= _zoom;
+
+					_zoom *= Math.Pow(1.1f, delta);
+					
+					_position *= _zoom;
+					_position += mouseInWindow;
+				}
+
+			}
+
+			if(_moving)
+			{
+				Point movement = Input.GetMouseMovement();
+
+				_position.X += movement.X;
+				_position.Y += movement.Y;
+			}
+		}
+
+		OrthographicCamera _camera = new OrthographicCamera() ~ delete _;
+
+		private void RenderTexture(Texture viewedTexture)
+		{
+			Viewport vp = .(0, 0, _target.Width, _target.Height);
+			RenderCommand.SetViewport(vp);
+
+			// TODO: don't clear pink!
+			RenderCommand.Clear(_target, .Pink);
+			RenderCommand.Clear(_depth, .Depth, 1.0f, 0);
+
+			//_target.Bind();
+			_context.SetRenderTarget(_target);
+			_context.SetDepthStencilTarget(_depth);
+			_context.BindRenderTargets();
+
+			Vector2 textureSize = Vector2(viewedTexture.Width, viewedTexture.Height);
+			Vector2 zoomedTextureSize = textureSize * _zoom;
+			
+			Vector2 targetSize = Vector2(_target.Width, _target.Height);
+
+			_effect.Variables["ColorOffset"].SetData(_colorOffset);
+			_effect.Variables["ColorScale"].SetData(_colorScale);
+			_effect.Variables["AlphaOffset"].SetData(_alphaOffset);
+			_effect.Variables["AlphaScale"].SetData(_alphaScale);
+
+			_camera.Left = 0;
+			_camera.Top = 0;
+			_camera.Right = targetSize.X;
+			_camera.Bottom = -targetSize.Y;
+			_camera.NearPlane = -5;
+			_camera.FarPlane = 5;
+			_camera.Update();
+
+			Renderer2D.BeginScene(_camera);
+			
+			switch(_backgroundMode)
+			{
+			case .Black:
+				Renderer2D.DrawQuadPivotCorner(Vector3(0, 0, 1), targetSize, 0, .Black);
+			case .White:
+				Renderer2D.DrawQuadPivotCorner(Vector3(0, 0, 1), targetSize, 0, .White);
+			case .Checkerboard:
+				float quadSize = 50.0f;
+
+				Vector2 numQuads = (targetSize / 500f) * 10f;
+
+				for(float x = 0; x < numQuads.X; x++)
+				{
+					for(float y = 0; y < numQuads.Y; y++)
+					{
+						Renderer2D.DrawQuadPivotCorner(Vector3(x * quadSize, -y * quadSize, 1), quadSize.XX, 0, ((x + y) % 2 == 0) ? .White : .Gray);
+					}
+				}
+				break;
+			}
+
+			Renderer2D.EndScene();
+
+			var sampler = viewedTexture.SamplerState;
+
+			switch(_sampleMode)
+			{
+			case .Point:
+				viewedTexture.SamplerState = _samplerPoint;
+			case .Linear:
+				viewedTexture.SamplerState = _samplerLinear;
+			}
+
+			Renderer2D.BeginScene(_camera, .SortByTexture, _effect);
+
+			Renderer2D.DrawQuad(Vector3(_position * .(1, -1), 0), zoomedTextureSize, 0, viewedTexture);
+			
+			Renderer2D.EndScene();
+
+			viewedTexture.SamplerState = sampler;
+		}
+	}
+}