public override void OnPreviewGUI(Rect r, GUIStyle background) { preview.Texture = target as Texture; preview.OnPreviewGUI(r, background); }
public override void OnPreviewGUI(Rect r, GUIStyle background) { if (Event.current.type == EventType.Repaint) { background.Draw(r, false, false, false, false); } // show texture Texture t = target as Texture; if (t == null) // texture might be gone by now, in case this code is used for floating texture preview { return; } GraphicsFormat format = t.graphicsFormat; if (!(GraphicsFormatUtility.IsIEEE754Format(format) || GraphicsFormatUtility.IsNormFormat(format))) { EditorGUI.HelpBox(r, "This preview only supports floating point or normalized formats.", MessageType.Warning); return; } // Render target must be created before we can display it (case 491797) RenderTexture rt = t as RenderTexture; if (rt != null) { if (rt.Create() == false) { return; } } if (IsCubemap()) { m_CubemapPreview.OnPreviewGUI(t, r, background, GetExposureValueForTexture(t)); return; } if (IsTexture3D()) { m_Texture3DPreview.Texture = t; m_Texture3DPreview.OnPreviewGUI(r, background); return; } if (IsTexture2DArray()) { m_Texture2DArrayPreview.OnPreviewGUI(t, r, background, GetExposureValueForTexture(t), m_PreviewMode, m_MipLevel); return; } // target can report zero sizes in some cases just after a parameter change; // guard against that. int texWidth = Mathf.Max(t.width, 1); int texHeight = Mathf.Max(t.height, 1); float mipLevel = GetMipLevelForRendering(); float zoomLevel = Mathf.Min(Mathf.Min(r.width / texWidth, r.height / texHeight), 1); Rect wantedRect = new Rect(r.x, r.y, texWidth * zoomLevel, texHeight * zoomLevel); PreviewGUI.BeginScrollView(r, m_Pos, wantedRect, "PreHorizontalScrollbar", "PreHorizontalScrollbarThumb"); FilterMode oldFilter = t.filterMode; TextureUtil.SetFilterModeNoDirty(t, FilterMode.Point); Texture2D t2d = t as Texture2D; ColorWriteMask colorWriteMask = ColorWriteMask.All; switch (m_PreviewMode) { case PreviewMode.R: colorWriteMask = ColorWriteMask.Red | ColorWriteMask.Alpha; break; case PreviewMode.G: colorWriteMask = ColorWriteMask.Green | ColorWriteMask.Alpha; break; case PreviewMode.B: colorWriteMask = ColorWriteMask.Blue | ColorWriteMask.Alpha; break; } if (m_PreviewMode == PreviewMode.A) { EditorGUI.DrawTextureAlpha(wantedRect, t, ScaleMode.StretchToFill, 0, mipLevel); } else { if (t2d != null && t2d.alphaIsTransparency) { EditorGUI.DrawTextureTransparent(wantedRect, t, ScaleMode.StretchToFill, 0, mipLevel, colorWriteMask, GetExposureValueForTexture(t)); } else { EditorGUI.DrawPreviewTexture(wantedRect, t, null, ScaleMode.StretchToFill, 0, mipLevel, colorWriteMask, GetExposureValueForTexture(t)); } } // TODO: Less hacky way to prevent sprite rects to not appear in smaller previews like icons. if ((wantedRect.width > 32 && wantedRect.height > 32) && Event.current.type == EventType.Repaint) { string path = AssetDatabase.GetAssetPath(t); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; SpriteMetaData[] spritesheet = textureImporter != null?textureImporter.GetSpriteMetaDatas() : null; if (spritesheet != null && textureImporter.spriteImportMode == SpriteImportMode.Multiple) { Rect screenRect = new Rect(); Rect sourceRect = new Rect(); GUI.CalculateScaledTextureRects(wantedRect, ScaleMode.StretchToFill, (float)t.width / (float)t.height, ref screenRect, ref sourceRect); int origWidth = t.width; int origHeight = t.height; textureImporter.GetWidthAndHeight(ref origWidth, ref origHeight); float definitionScale = (float)t.width / (float)origWidth; HandleUtility.ApplyWireMaterial(); GL.PushMatrix(); GL.MultMatrix(Handles.matrix); GL.Begin(GL.LINES); GL.Color(new Color(1f, 1f, 1f, 0.5f)); foreach (SpriteMetaData sprite in spritesheet) { Rect spriteRect = sprite.rect; Rect spriteScreenRect = new Rect(); spriteScreenRect.xMin = screenRect.xMin + screenRect.width * (spriteRect.xMin / t.width * definitionScale); spriteScreenRect.xMax = screenRect.xMin + screenRect.width * (spriteRect.xMax / t.width * definitionScale); spriteScreenRect.yMin = screenRect.yMin + screenRect.height * (1f - spriteRect.yMin / t.height * definitionScale); spriteScreenRect.yMax = screenRect.yMin + screenRect.height * (1f - spriteRect.yMax / t.height * definitionScale); DrawRect(spriteScreenRect); } GL.End(); GL.PopMatrix(); } } TextureUtil.SetFilterModeNoDirty(t, oldFilter); m_Pos = PreviewGUI.EndScrollView(); if (mipLevel != 0) { EditorGUI.DropShadowLabel(new Rect(r.x, r.y, r.width, 20), "Mip " + mipLevel); } }