Texture implementations of GetPixel, GetPixels, SetPixel and SetPixels, plus helpers.

Framework/PressPlay.FFWD/Texture.cs

@@ -61,6 +61,11 @@ public void Apply()
             Apply(false, false);
         }
 
+        public void Apply(bool updateMipmaps)
+        {
+            Apply(updateMipmaps, false);
+        }
+
         public void Apply(bool updateMipmaps, bool makeNoLongerReadable)
         {
             // TODO: Implement this

Framework/PressPlay.FFWD/Texture2D.cs

@@ -29,7 +29,47 @@ internal static Texture2D LoadFromResource(string name)
             return new Texture2D(t);
         }
 
+        public int mipmapCount
+        {
+            get
+            {
+                return (tex == null) ? 0 : tex.LevelCount;
+            }
+        }
+
+        public void SetPixel(int x, int y, Color color)
+        {
+            // Unity takes Wrap mode into account and so should we. By default, wrap.
+            int modX = x > 0 && x < tex.Width ? x : x % tex.Width;
+            // % means remainder, not modulus, so we can get negative values.
+            if (modX < 0)
+            {
+                modX += tex.Width;
+            }
+
+            int modY = y > 0 && y < tex.Height ? y : y % tex.Height;
+            if (modY < 0)
+            {
+                modY += tex.Height;
+            }
+
+            byte[] buffer = new byte[]
+                {
+                    color.R,
+                    color.G,
+                    color.B,
+                    color.A
+                };
+
+            tex.SetData<byte>(0, new Microsoft.Xna.Framework.Rectangle(modX, modY, 1, 1), buffer, 0, buffer.Length);
+        }
+
         public void SetPixels(Color[] colors)
+        {
+            SetPixels(colors, 0);
+        }
+
+        public void SetPixels(Color[] colors, int miplevel)
         {
             byte[] buffer = new byte[colors.Length << 2];
 
@@ -41,13 +81,154 @@ public void SetPixels(Color[] colors)
                 buffer[(i << 2) + 3] = colors[i].A;
             }
 
-            tex.SetData<byte>(buffer);
+            tex.SetData<byte>(miplevel, null, buffer, 0, buffer.Length);
         }
 
-        public void SetPixel(int x, int y, Color color)
+        public void SetPixels(int x, int y, int blockWidth, int blockHeight, Color[] colors)
+        {
+            SetPixels(x, y, blockWidth, blockHeight, colors, 0);
+        }
+
+        public void SetPixels(int x, int y, int blockWidth, int blockHeight, Color[] colors, int miplevel)
+        {
+            byte[] buffer = new byte[colors.Length << 2];
+
+            for (int i = 0; i < colors.Length; ++i)
+            {
+                buffer[(i << 2)] = colors[i].R;
+                buffer[(i << 2) + 1] = colors[i].G;
+                buffer[(i << 2) + 2] = colors[i].B;
+                buffer[(i << 2) + 3] = colors[i].A;
+            }
+
+            tex.SetData<byte>(miplevel, new Microsoft.Xna.Framework.Rectangle(x, y, blockWidth, blockHeight), buffer, 0, blockWidth * blockHeight << 2);
+        }
+
+        public Color GetPixel(int x, int y)
+        {
+            // By default, textures in Unity are set to Wrap = Repeat.
+            // Use that as default.
+            // Calculate the modulus of x and y, so we don't go out of bounds.
+            int modX = x > 0 && x < tex.Width ? x : x % tex.Width;
+            // % means remainder, not modulus, so we can get negative values.
+            if (modX < 0)
+            {
+                modX += tex.Width;
+            }
+
+            int modY = y > 0 && y < tex.Height ? y : y % tex.Height;
+            if (modY < 0)
+            {
+                modY += tex.Height;
+            }
+
+            byte[] buffer = new byte[4];
+            tex.GetData<byte>(0, new Microsoft.Xna.Framework.Rectangle(modX, modY, 1, 1), buffer, 0, 4);
+
+            Color color = new Color();
+            color.R = buffer[0];
+            color.G = buffer[1];
+            color.B = buffer[2];
+            color.A = buffer[3];
+
+            return color;
+        }
+
+        public Color[] GetPixels()
         {
-            // TODO: Implement this
+            return GetPixels(0);
         }
 
+        public Color[] GetPixels(int miplevel)
+        {
+            int mipSize = GetMipmapSize(miplevel);
+
+            byte[] buffer = new byte[mipSize << 2];
+            tex.GetData<byte>(miplevel, null, buffer, 0, mipSize << 2);
+
+            Color[] colors = new Color[mipSize];
+            for (int i = 0; i < mipSize; i++)
+            {
+                colors[i] = new Color();
+                colors[i].R = buffer[(i << 2)];
+                colors[i].G = buffer[(i << 2) + 1];
+                colors[i].B = buffer[(i << 2) + 2];
+                colors[i].A = buffer[(i << 2) + 3];
+            }
+
+            return colors;
+        }
+
+        public Color[] GetPixels(int x, int y, int blockWidth, int blockHeight)
+        {
+            return GetPixels(x, y, blockWidth, blockHeight, 0);
+        }
+
+        public Color[] GetPixels(int x, int y, int blockWidth, int blockHeight, int miplevel)
+        {
+            byte[] buffer = new byte[(blockWidth * blockHeight) << 2];
+
+            tex.GetData<byte>(miplevel, new Microsoft.Xna.Framework.Rectangle(x, y, blockWidth, blockHeight), buffer, 0, buffer.Length);
+
+            Color[] colors = new Color[blockWidth * blockHeight];
+            for (int i = 0; i < colors.Length; i++)
+            {
+                colors[i] = new Color();
+                colors[i].R = buffer[(i << 2)];
+                colors[i].G = buffer[(i << 2) + 1];
+                colors[i].B = buffer[(i << 2) + 2];
+                colors[i].A = buffer[(i << 2) + 3];
+            }
+
+            return colors;
+        }
+
+        protected int GetMipmapSize()
+        {
+            return GetMipmapSize(0);
+        }
+
+        protected int GetMipmapSize(int miplevel)
+        {
+            if (miplevel < 0 || miplevel >= mipmapCount)
+            {
+                throw new ArgumentOutOfRangeException("miplevel", "Texture has " + mipmapCount + " mipmap levels. Mipmap " + miplevel + " is out of range.");
+            }
+
+            // Each mip level is one fourth the size of the previous one
+            return (int)(tex.Width * tex.Height / Math.Pow(4, miplevel));
+        }
+
+        protected int GetMipmapWidth()
+        {
+            return GetMipmapWidth(0);
+        }
+
+        protected int GetMipmapWidth(int miplevel)
+        {
+            if (miplevel < 0 || miplevel >= mipmapCount)
+            {
+                throw new ArgumentOutOfRangeException("miplevel", "Texture has " + mipmapCount + " mipmap levels. Mipmap " + miplevel + " is out of range.");
+            }
+
+            // Each miplevel is half the width and hwight of the previous one
+            return (int)(tex.Width / Math.Pow(2, miplevel));
+        }
+
+        protected int GetMipmapHeight()
+        {
+            return GetMipmapHeight(0);
+        }
+
+        protected int GetMipmapHeight(int miplevel)
+        {
+            if (miplevel < 0 || miplevel >= mipmapCount)
+            {
+                throw new ArgumentOutOfRangeException("miplevel", "Texture has " + mipmapCount + " mipmap levels. Mipmap " + miplevel + " is out of range.");
+            }
+
+            // Each miplevel is half the width and hwight of the previous one
+            return (int)(tex.Height / Math.Pow(2, miplevel));
+        }
     }
 }