305 lines
12 KiB
C#
305 lines
12 KiB
C#
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using System.Collections.Generic;
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using Unity.Mathematics;
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using UnityEditor.U2D.Sprites;
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using UnityEngine;
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namespace UnityEditor.U2D.Animation
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{
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internal class SpriteOutlineRenderer
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{
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class OutlineRenderTexture
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{
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public Texture outlineTexture;
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public bool dirty;
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}
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Material m_OutlineMaterial;
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Material m_BitMaskMaterial;
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Material m_EdgeOutlineMaterial;
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Mesh m_CircleMesh;
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Dictionary<string, OutlineRenderTexture> m_OutlineTextureCache = new ();
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SkinningEvents m_EventSystem;
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static readonly int k_OutlineColorProperty = Shader.PropertyToID("_OutlineColor");
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static readonly int k_OutlineSizeProperty = Shader.PropertyToID("_OutlineSize");
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static readonly int k_AdjustLinearForGammaProperty = Shader.PropertyToID("_AdjustLinearForGamma");
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const int k_ReferenceTextureSize = 1024;
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public SpriteOutlineRenderer(SkinningEvents eventSystem)
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{
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m_EdgeOutlineMaterial = new Material(Shader.Find("Hidden/2D-Animation-SpriteEdgeOutline")) { hideFlags = HideFlags.HideAndDontSave };
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m_BitMaskMaterial = new Material(Shader.Find("Hidden/2D-Animation-SpriteBitmask")) { hideFlags = HideFlags.HideAndDontSave };
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m_OutlineMaterial = new Material(Shader.Find("Hidden/2D-Animation-SpriteOutline")) { hideFlags = HideFlags.HideAndDontSave };
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m_EventSystem = eventSystem;
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m_EventSystem.meshPreviewChanged.AddListener(OnMeshPreviewChanged);
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m_EventSystem.selectedSpriteChanged.AddListener(OnSelectionChanged);
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m_CircleMesh = GenerateCircleMesh();
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}
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public void Dispose()
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{
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DestroyMaterialsAndMeshes();
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DestroyTextures();
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m_EventSystem.meshPreviewChanged.RemoveListener(OnMeshPreviewChanged);
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m_EventSystem.selectedSpriteChanged.RemoveListener(OnSelectionChanged);
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}
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internal void RenderSpriteOutline(ISpriteEditor spriteEditor, SpriteCache sprite)
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{
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if (spriteEditor == null || sprite == null)
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return;
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if (SelectionOutlineSettings.selectedSpriteOutlineSize < 0.01f || SelectionOutlineSettings.outlineColor.a < 0.01f)
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return;
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var mesh = GetMesh(sprite);
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if (mesh == null)
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return;
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UnityEngine.Profiling.Profiler.BeginSample("SpriteOutlineRenderer::RenderSpriteOutline");
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var vertices = mesh.vertices;
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var edges = sprite.GetMesh().edges;
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var multMatrix = Handles.matrix * sprite.GetLocalToWorldMatrixFromMode();
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var texture = spriteEditor.GetDataProvider<ITextureDataProvider>().texture;
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var outlineSize = SelectionOutlineSettings.selectedSpriteOutlineSize;
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var outlineColor = SelectionOutlineSettings.outlineColor;
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var adjustForGamma = PlayerSettings.colorSpace == ColorSpace.Linear ? 1.0f : 0.0f;
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if (edges != null && edges.Length > 0 && vertices.Length > 0)
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{
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var finalOutlineSize = outlineSize / spriteEditor.zoomLevel;
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DrawEdgeOutline(edges, vertices, multMatrix, finalOutlineSize, outlineColor, adjustForGamma);
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}
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else // Fallback: Draw using the Sobel filter.
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{
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var finalOutlineSize = Mathf.Max(texture.width, texture.height) * outlineSize / k_ReferenceTextureSize;
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DrawMeshOutline(mesh, sprite, multMatrix, finalOutlineSize, outlineColor, adjustForGamma);
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}
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UnityEngine.Profiling.Profiler.EndSample();
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}
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void DrawEdgeOutline(int2[] edges, Vector3[] vertices, Matrix4x4 multMatrix, float outlineSize, Color outlineColor, float adjustForGamma)
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{
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m_EdgeOutlineMaterial.SetColor(k_OutlineColorProperty, outlineColor);
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m_EdgeOutlineMaterial.SetFloat(k_AdjustLinearForGammaProperty, adjustForGamma);
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m_EdgeOutlineMaterial.SetPass(0);
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var edgeCount = edges.Length;
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var vertexCount = vertices.Length;
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GL.PushMatrix();
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GL.MultMatrix(multMatrix);
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GL.Begin(GL.QUADS);
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for (var i = 0; i < edgeCount; i++)
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{
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var currentEdge = edges[i];
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if (currentEdge.x < 0 || currentEdge.y < 0 || currentEdge.x >= vertexCount || currentEdge.y >= vertexCount)
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continue;
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var start = vertices[edges[i].x];
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var end = vertices[edges[i].y];
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var direction = (end - start).normalized;
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var right = Vector3.Cross(Vector3.forward, direction) * outlineSize;
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GL.Vertex(start - right);
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GL.Vertex(start + right);
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GL.Vertex(end + right);
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GL.Vertex(end - right);
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}
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GL.End();
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GL.PopMatrix();
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for (var i = 0; i < edgeCount; i++)
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{
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var currentEdge = edges[i];
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if (currentEdge.x < 0 || currentEdge.y < 0 || currentEdge.x >= vertexCount || currentEdge.y >= vertexCount)
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continue;
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var start = vertices[edges[i].x];
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var end = vertices[edges[i].y];
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Graphics.DrawMeshNow(m_CircleMesh, multMatrix * Matrix4x4.TRS(start, Quaternion.identity, Vector3.one * outlineSize));
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Graphics.DrawMeshNow(m_CircleMesh, multMatrix * Matrix4x4.TRS(end, Quaternion.identity, Vector3.one * outlineSize));
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}
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}
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void DrawMeshOutline(Mesh mesh, SpriteCache spriteCache, Matrix4x4 multMatrix, float outlineSize, Color outlineColor, float adjustForGamma)
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{
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TryRegenerateMaskTexture(spriteCache);
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m_OutlineMaterial.SetColor(k_OutlineColorProperty, outlineColor);
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m_OutlineMaterial.SetFloat(k_AdjustLinearForGammaProperty, adjustForGamma);
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m_OutlineMaterial.SetFloat(k_OutlineSizeProperty, outlineSize);
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m_OutlineMaterial.SetPass(0);
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GL.PushMatrix();
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GL.MultMatrix(multMatrix);
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var meshBoundsRect = new Rect(mesh.bounds.min.x, mesh.bounds.min.y, mesh.bounds.size.x, mesh.bounds.size.y);
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GL.Begin(GL.QUADS);
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GL.Color(Color.white);
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GL.TexCoord(new Vector3(0, 0, 0));
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GL.Vertex3(meshBoundsRect.xMin, meshBoundsRect.yMin, 0);
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GL.TexCoord(new Vector3(1, 0, 0));
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GL.Vertex3(meshBoundsRect.xMax, meshBoundsRect.yMin, 0);
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GL.TexCoord(new Vector3(1, 1, 0));
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GL.Vertex3(meshBoundsRect.xMax, meshBoundsRect.yMax, 0);
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GL.TexCoord(new Vector3(0, 1, 0));
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GL.Vertex3(meshBoundsRect.xMin, meshBoundsRect.yMax, 0);
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GL.End();
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GL.PopMatrix();
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}
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Texture GenerateOutlineTexture(SpriteCache spriteCache, RenderTexture reuseRT)
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{
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if (spriteCache == null)
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return null;
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var mesh = GetMesh(spriteCache);
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if (mesh == null || (int)mesh.bounds.size.x == 0 || (int)mesh.bounds.size.y == 0)
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return null;
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var bounds = mesh.bounds;
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UnityEngine.Profiling.Profiler.BeginSample("SpriteOutlineRenderer::GenerateOutlineTexture");
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if (reuseRT == null || reuseRT.width != (int)bounds.size.x || reuseRT.height != (int)bounds.size.y)
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{
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UnityEngine.Profiling.Profiler.BeginSample("SpriteOutlineRenderer::CreateRT");
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if(reuseRT != null)
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Object.DestroyImmediate(reuseRT);
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reuseRT = new RenderTexture((int)bounds.size.x, (int)bounds.size.y, 24, RenderTextureFormat.ARGBHalf) { filterMode = FilterMode.Bilinear };
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UnityEngine.Profiling.Profiler.EndSample();
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}
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var oldRT = RenderTexture.active;
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Graphics.SetRenderTarget(reuseRT);
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m_BitMaskMaterial.SetPass(0);
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UnityEngine.Profiling.Profiler.BeginSample("SpriteOutlineRenderer::DrawMesh");
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GL.Clear(false, true, new Color(0, 0, 0, 0));
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GL.PushMatrix();
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GL.LoadOrtho();
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var h = bounds.size.y * 0.5f;
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var w = h * (bounds.size.x / bounds.size.y);
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GL.LoadProjectionMatrix(Matrix4x4.Ortho(-w, w, -h, h, -1, 1));
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GL.Begin(GL.QUADS);
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GL.Color(Color.white);
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Graphics.DrawMeshNow(mesh, Matrix4x4.Translate(-bounds.center));
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GL.End();
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GL.PopMatrix();
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Graphics.SetRenderTarget(oldRT);
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UnityEngine.Profiling.Profiler.EndSample();
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UnityEngine.Profiling.Profiler.EndSample();
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return reuseRT;
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}
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static Mesh GetMesh(SpriteCache sprite)
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{
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var meshPreview = sprite.GetMeshPreview();
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if (meshPreview == null)
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return null;
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return meshPreview.mesh.vertexCount > 0 ? meshPreview.mesh : meshPreview.defaultMesh;
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}
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static Mesh GenerateCircleMesh()
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{
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const int triangleVerts = 9;
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var verts = new Vector3[triangleVerts];
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for (var i = 1; i < verts.Length; i++)
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{
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verts[i] = Quaternion.Euler(0, 0, i * 360f / (verts.Length - 1)) * Vector3.up;
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}
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var indices = new int[(verts.Length - 1) * 3];
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var index = 0;
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for (var i = 1; i < triangleVerts; i++)
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{
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indices[index++] = 0;
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indices[index++] = i;
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indices[index++] = i + 1 < triangleVerts ? i + 1 : 1;
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}
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return new Mesh { vertices = verts, triangles = indices, hideFlags = HideFlags.HideAndDontSave };
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}
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void OnMeshPreviewChanged(MeshPreviewCache mesh)
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{
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AddOrUpdateMaskTexture(mesh.sprite, true);
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}
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void OnSelectionChanged(SpriteCache spriteCache)
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{
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AddOrUpdateMaskTexture(spriteCache, false);
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}
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void DestroyMaterialsAndMeshes()
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{
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if(m_EdgeOutlineMaterial != null)
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Object.DestroyImmediate(m_EdgeOutlineMaterial);
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if (m_BitMaskMaterial != null)
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Object.DestroyImmediate(m_BitMaskMaterial);
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if (m_OutlineMaterial != null)
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Object.DestroyImmediate(m_OutlineMaterial);
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if(m_CircleMesh != null)
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Object.DestroyImmediate(m_CircleMesh);
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}
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void DestroyTextures()
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{
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if (m_OutlineTextureCache != null)
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{
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foreach (var value in m_OutlineTextureCache.Values)
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{
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if (value != null && value.outlineTexture != null)
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Object.DestroyImmediate(value.outlineTexture);
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}
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m_OutlineTextureCache.Clear();
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}
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}
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void AddOrUpdateMaskTexture(SpriteCache sprite, bool regenerate)
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{
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if (m_OutlineTextureCache != null && sprite != null)
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{
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if (!m_OutlineTextureCache.ContainsKey(sprite.id))
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m_OutlineTextureCache.Add(sprite.id, new OutlineRenderTexture() {dirty = true});
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var outlineTextureCache = m_OutlineTextureCache[sprite.id];
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outlineTextureCache.dirty |= regenerate;
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}
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}
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void TryRegenerateMaskTexture(SpriteCache sprite)
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{
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var selectedSprite = sprite.skinningCache.selectedSprite;
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var outlineTextureCache = m_OutlineTextureCache[sprite.id];
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if (sprite == selectedSprite)
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{
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if (outlineTextureCache.dirty || outlineTextureCache.outlineTexture == null)
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{
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outlineTextureCache.outlineTexture = GenerateOutlineTexture(sprite, (RenderTexture)outlineTextureCache.outlineTexture);
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if (outlineTextureCache.outlineTexture != null)
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{
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outlineTextureCache.outlineTexture.hideFlags = HideFlags.HideAndDontSave;
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outlineTextureCache.dirty = false;
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}
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}
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m_OutlineMaterial.mainTexture = outlineTextureCache.outlineTexture;
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}
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}
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}
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}
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