public sealed override Texture2D RenderStaticPreview(string assetPath, UnityEngine.Object[] subAssets, int width, int height)
{
Brush brush = AssetDatabase.LoadMainAssetAtPath(assetPath) as Brush;
if (brush == null)
{
return(null);
}
if (brush.m_Mask == null)
{
brush.m_Mask = Brush.DefaultMask();
}
PreviewHelpers.AdjustWidthAndHeightForStaticPreview(brush.m_Mask.width, brush.m_Mask.height, ref width, ref height);
return(Brush.GenerateBrushTexture(brush.m_Mask, brush.m_Falloff, brush.m_RadiusScale, brush.m_BlackWhiteRemapMin, brush.m_BlackWhiteRemapMax, brush.m_InvertRemapRange, width, height, true));
}
public override void OnPreviewGUI(Rect r, GUIStyle background)
{
if (Event.current.type == EventType.Repaint)
{
background.Draw(r, false, false, false, false);
}
Texture2D mask = (Texture2D)m_Mask.objectReferenceValue;
if (mask == null)
{
mask = Brush.DefaultMask();
m_HasChanged = true;
}
int texWidth = Mathf.Min(mask.width, 256);
int texHeight = Mathf.Min(mask.height, 256);
if (m_HasChanged || m_PreviewTexture == null)
{
m_PreviewTexture = Brush.GenerateBrushTexture(mask, m_Falloff.animationCurveValue, m_RadiusScale.floatValue, m_BlackWhiteRemapMin.floatValue, m_BlackWhiteRemapMax.floatValue, m_InvertRemapRange.boolValue, texWidth, texHeight, true);
m_HasChanged = false;
}
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");
if (m_PreviewTexture.alphaIsTransparency)
{
EditorGUI.DrawTextureTransparent(wantedRect, m_PreviewTexture);
}
else
{
EditorGUI.DrawPreviewTexture(wantedRect, m_PreviewTexture);
}
m_Pos = PreviewGUI.EndScrollView();
}