Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-30 20:40:51 -07:00
commit b451f83174
525 changed files with 75786 additions and 0 deletions
@@ -0,0 +1,63 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace Theriapolis.Game.CodexUI.Core;
+
+/// <summary>
+/// Renders a 9-slice texture into an arbitrary destination rectangle: the
+/// four corners stay at their authored size, the four edges stretch along
+/// one axis, and the centre stretches both axes. Used for parchment cards,
+/// gilded borders, button backgrounds, and slot frames.
+///
+/// Per-side inset values describe how many source-texture pixels the
+/// fixed-size corner+edge bands take. They must add up to less than the
+/// source texture's width/height in each axis or the centre band collapses.
+/// </summary>
+public readonly struct NineSliceInsets
+{
+    public readonly int Left, Top, Right, Bottom;
+
+    public NineSliceInsets(int uniform) : this(uniform, uniform, uniform, uniform) { }
+    public NineSliceInsets(int l, int t, int r, int b) { Left = l; Top = t; Right = r; Bottom = b; }
+}
+
+public static class NineSlice
+{
+    /// <summary>
+    /// Draw a 9-slice <paramref name="texture"/> tinted with <paramref name="tint"/>
+    /// into <paramref name="dest"/> using <paramref name="insets"/> as the corner sizes.
+    /// </summary>
+    public static void Draw(SpriteBatch sb, Texture2D texture, Rectangle dest,
+                            NineSliceInsets insets, Color tint)
+    {
+        int sw = texture.Width;
+        int sh = texture.Height;
+        int l = insets.Left, t = insets.Top, r = insets.Right, b = insets.Bottom;
+        int cw = sw - l - r;  // source center width
+        int ch = sh - t - b;  // source center height
+        if (cw < 1) cw = 1;
+        if (ch < 1) ch = 1;
+
+        int dl = dest.X;
+        int dt = dest.Y;
+        int dcw = System.Math.Max(0, dest.Width  - l - r);
+        int dch = System.Math.Max(0, dest.Height - t - b);
+        int dr = dest.X + dest.Width  - r;
+        int db = dest.Y + dest.Height - b;
+
+        // Corners (1× scale)
+        sb.Draw(texture, new Rectangle(dl, dt, l, t),                    new Rectangle(0,         0,        l, t),  tint);
+        sb.Draw(texture, new Rectangle(dr, dt, r, t),                    new Rectangle(sw - r,    0,        r, t),  tint);
+        sb.Draw(texture, new Rectangle(dl, db, l, b),                    new Rectangle(0,         sh - b,   l, b),  tint);
+        sb.Draw(texture, new Rectangle(dr, db, r, b),                    new Rectangle(sw - r,    sh - b,   r, b),  tint);
+
+        // Edges (stretched along their long axis)
+        sb.Draw(texture, new Rectangle(dl + l, dt,     dcw, t),          new Rectangle(l,         0,        cw, t),  tint);
+        sb.Draw(texture, new Rectangle(dl + l, db,     dcw, b),          new Rectangle(l,         sh - b,   cw, b),  tint);
+        sb.Draw(texture, new Rectangle(dl,     dt + t, l,   dch),        new Rectangle(0,         t,        l,  ch), tint);
+        sb.Draw(texture, new Rectangle(dr,     dt + t, r,   dch),        new Rectangle(sw - r,    t,        r,  ch), tint);
+
+        // Centre (stretched both axes)
+        sb.Draw(texture, new Rectangle(dl + l, dt + t, dcw, dch),        new Rectangle(l,         t,        cw, ch), tint);
+    }
+}