Mindgames/Library/PackageCache/com.unity.render-pipelines.high-definition@6.9.0-preview/Editor/Core/CameraEditorUtils.cs

   1 using UnityEngine;
   2 using Object = UnityEngine.Object;
   3
   4 namespace UnityEditor.Experimental.Rendering
   5 {
   6     public static class CameraEditorUtils
   7     {
   8         public delegate Camera GetPreviewCamera(Camera sourceCamera, Vector2 previewSize);
   9
  10         const float k_PreviewNormalizedSize = 0.2f;
  11
  12         internal static Material s_GUITextureBlit2SRGBMaterial;
  13         public static Material GUITextureBlit2SRGBMaterial
  14         {
  15             get
  16             {
  17                 if (!s_GUITextureBlit2SRGBMaterial)
  18                 {
  19                     Shader shader = EditorGUIUtility.LoadRequired("SceneView/GUITextureBlit2SRGB.shader") as Shader;
  20                     s_GUITextureBlit2SRGBMaterial = new Material(shader);
  21                     s_GUITextureBlit2SRGBMaterial.hideFlags = HideFlags.HideAndDontSave;
  22                 }
  23                 s_GUITextureBlit2SRGBMaterial.SetFloat("_ManualTex2SRGB", QualitySettings.activeColorSpace == ColorSpace.Linear ? 1.0f : 0.0f);
  24                 return s_GUITextureBlit2SRGBMaterial;
  25             }
  26         }
  27
  28         public static void DrawCameraSceneViewOverlay(Object target, SceneView sceneView, GetPreviewCamera previewCameraGetter)
  29         {
  30             if (target == null) return;
  31
  32             // cache some deep values
  33             var c = (Camera)target;
  34
  35             var previewSize = Handles.GetMainGameViewSize();
  36             if (previewSize.x < 0f)
  37             {
  38                 // Fallback to Scene View of not a valid game view size
  39                 previewSize.x = sceneView.position.width;
  40                 previewSize.y = sceneView.position.height;
  41             }
  42             // Apply normalizedviewport rect of camera
  43             var normalizedViewPortRect = c.rect;
  44             previewSize.x *= Mathf.Max(normalizedViewPortRect.width, 0f);
  45             previewSize.y *= Mathf.Max(normalizedViewPortRect.height, 0f);
  46
  47             // Prevent using invalid previewSize
  48             if (previewSize.x <= 0f || previewSize.y <= 0f)
  49                 return;
  50
  51             var aspect = previewSize.x / previewSize.y;
  52
  53             // Scale down (fit to scene view)
  54             previewSize.y = k_PreviewNormalizedSize * sceneView.position.height;
  55             previewSize.x = previewSize.y * aspect;
  56             if (previewSize.y > sceneView.position.height * 0.5f)
  57             {
  58                 previewSize.y = sceneView.position.height * 0.5f;
  59                 previewSize.x = previewSize.y * aspect;
  60             }
  61             if (previewSize.x > sceneView.position.width * 0.5f)
  62             {
  63                 previewSize.x = sceneView.position.width * 0.5f;
  64                 previewSize.y = previewSize.x / aspect;
  65             }
  66
  67             // Get and reserve rect
  68             Rect cameraRect = GUILayoutUtility.GetRect(previewSize.x, previewSize.y);
  69
  70             if (Event.current.type == EventType.Repaint)
  71             {
  72                 var previewCamera = previewCameraGetter(c, previewSize);
  73                 if (previewCamera.targetTexture == null)
  74                 {
  75                     Debug.LogError("The preview camera must render in a render target");
  76                     return;
  77                 }
  78
  79                 sceneView.drawGizmos = false;
  80                 previewCamera.Render();
  81                 sceneView.drawGizmos = true;
  82                 Graphics.DrawTexture(cameraRect, previewCamera.targetTexture, new Rect(0, 0, 1, 1), 0, 0, 0, 0, GUI.color, GUITextureBlit2SRGBMaterial);
  83                 // We set target texture to null after this call otherwise if both sceneview and gameview are visible and we have a preview camera wwe
  84                 // get this error: "Releasing render texture that is set as Camera.targetTexture!"
  85                 previewCamera.targetTexture = null;
  86             }
  87         }
  88
  89         public static bool IsViewPortRectValidToRender(Rect normalizedViewPortRect)
  90         {
  91             if (normalizedViewPortRect.width <= 0f || normalizedViewPortRect.height <= 0f)
  92                 return false;
  93             if (normalizedViewPortRect.x >= 1f || normalizedViewPortRect.xMax <= 0f)
  94                 return false;
  95             if (normalizedViewPortRect.y >= 1f || normalizedViewPortRect.yMax <= 0f)
  96                 return false;
  97             return true;
  98         }
  99     }
 100 }