GlowmaskEntity.cs

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using Loot.Api.ModContent;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Terraria;

namespace Loot.Api.Graphics.Glowmask
{
    public class GlowmaskEntity : GraphicsEntity<GlowmaskGraphicsProperties>
    {
        public bool DrawHitbox { get; set; } // mostly for debug purposes
        public Texture2D GlowmaskTexture { get; protected set; }

        public GlowmaskEntity(object subjectIdentity, bool drawHitbox = false, short order = 0, Color? drawColor = null,
            GlowmaskGraphicsProperties props = null)
            : base(subjectIdentity)
        {
            DrawHitbox = drawHitbox;
            Order = order;
            DrawColor = drawColor ?? Color.White;
            Properties = props ?? GlowmaskGraphicsProperties.Builder.Build();
        }

        protected override void LoadAssets(Item item)
        {
            if (GlowmaskTexture != null) return;
            var graphicsContent = Loot.ModContentManager.GetContent<GraphicsModContent>();
            graphicsContent?.Prepare(item);
            GlowmaskTexture = graphicsContent?.GetPreparedGlowmask(item.type.ToString()) ?? Main.itemTexture[item.type];
        }

        public void DoDrawGlowmask(SpriteBatch spriteBatch, Color lightColor, Color alphaColor, float rotation, float scale, int whoAmI, Texture2D suppliedGlowmask = null)
        {
            if (!Properties.SkipDrawing || !Properties.SkipDrawingGlowmask) return;

            TryGettingDrawData(rotation, scale);
            if (Entity is Item item) LoadAssets(item);
            else Loot.Logger.Warn("Could not identify shader entity identity as item");
            Texture2D useGlowmaskTexture = suppliedGlowmask ?? GlowmaskTexture;

            if (useGlowmaskTexture != null)
            {
                var drawDataTexture = DrawData.texture;
                var drawDataColor = DrawData.color;
                var drawDataDestinationRectangle = DrawData.destinationRectangle;
                DrawData.texture = useGlowmaskTexture;
                DrawData.color = lightColor;
                TryUpdatingDrawData(useGlowmaskTexture);
                DrawEntity(spriteBatch);
                DrawData.texture = drawDataTexture;
                DrawData.color = drawDataColor;
                DrawData.destinationRectangle = drawDataDestinationRectangle;
            }

            Properties.SkipUpdatingDrawData = false;
        }

        public void DoDrawHitbox(SpriteBatch spriteBatch)
        {
            if (!DrawHitbox) return;
            Rectangle hitbox = Entity.Hitbox;
            hitbox.Offset((int)-Main.screenPosition.X, (int)-Main.screenPosition.Y);
            spriteBatch.Draw(Main.magicPixel, hitbox, Color.White);
        }
    }
}