Initial work

4 files changed, 152 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.GAL/Texture/DepthStencilMode.cs b/Ryujinx.Graphics.GAL/Texture/DepthStencilMode.cs
new file mode 100644
index 00000000..d7a379d8
--- /dev/null
+++ b/Ryujinx.Graphics.GAL/Texture/DepthStencilMode.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.GAL.Texture
+{
+    public enum DepthStencilMode
+    {
+        Depth,
+        Stencil
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.GAL/Texture/SwizzleComponent.cs b/Ryujinx.Graphics.GAL/Texture/SwizzleComponent.cs
new file mode 100644
index 00000000..fd7d50e3
--- /dev/null
+++ b/Ryujinx.Graphics.GAL/Texture/SwizzleComponent.cs
@@ -0,0 +1,12 @@
+namespace Ryujinx.Graphics.GAL.Texture
+{
+    public enum SwizzleComponent
+    {
+        Zero,
+        One,
+        Red,
+        Green,
+        Blue,
+        Alpha
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.GAL/Texture/Target.cs b/Ryujinx.Graphics.GAL/Texture/Target.cs
new file mode 100644
index 00000000..b9cc1105
--- /dev/null
+++ b/Ryujinx.Graphics.GAL/Texture/Target.cs
@@ -0,0 +1,17 @@
+namespace Ryujinx.Graphics.GAL.Texture
+{
+    public enum Target
+    {
+        Texture1D,
+        Texture2D,
+        Texture3D,
+        Texture1DArray,
+        Texture2DArray,
+        Texture2DMultisample,
+        Texture2DMultisampleArray,
+        Rectangle,
+        Cubemap,
+        CubemapArray,
+        TextureBuffer
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.GAL/Texture/TextureCreateInfo.cs b/Ryujinx.Graphics.GAL/Texture/TextureCreateInfo.cs
new file mode 100644
index 00000000..ad365f6b
--- /dev/null
+++ b/Ryujinx.Graphics.GAL/Texture/TextureCreateInfo.cs
@@ -0,0 +1,115 @@
+using Ryujinx.Common;
+using System;
+
+namespace Ryujinx.Graphics.GAL.Texture
+{
+    public struct TextureCreateInfo
+    {
+        public int Width         { get; }
+        public int Height        { get; }
+        public int Depth         { get; }
+        public int Levels        { get; }
+        public int Samples       { get; }
+        public int BlockWidth    { get; }
+        public int BlockHeight   { get; }
+        public int BytesPerPixel { get; }
+
+        public bool IsCompressed => (BlockWidth | BlockHeight) != 1;
+
+        public Format Format { get; }
+
+        public DepthStencilMode DepthStencilMode { get; }
+
+        public Target Target { get; }
+
+        public SwizzleComponent SwizzleR { get; }
+        public SwizzleComponent SwizzleG { get; }
+        public SwizzleComponent SwizzleB { get; }
+        public SwizzleComponent SwizzleA { get; }
+
+        public TextureCreateInfo(
+            int              width,
+            int              height,
+            int              depth,
+            int              levels,
+            int              samples,
+            int              blockWidth,
+            int              blockHeight,
+            int              bytesPerPixel,
+            Format           format,
+            DepthStencilMode depthStencilMode,
+            Target           target,
+            SwizzleComponent swizzleR,
+            SwizzleComponent swizzleG,
+            SwizzleComponent swizzleB,
+            SwizzleComponent swizzleA)
+        {
+            Width            = width;
+            Height           = height;
+            Depth            = depth;
+            Levels           = levels;
+            Samples          = samples;
+            BlockWidth       = blockWidth;
+            BlockHeight      = blockHeight;
+            BytesPerPixel    = bytesPerPixel;
+            Format           = format;
+            DepthStencilMode = depthStencilMode;
+            Target           = target;
+            SwizzleR         = swizzleR;
+            SwizzleG         = swizzleG;
+            SwizzleB         = swizzleB;
+            SwizzleA         = swizzleA;
+        }
+
+        public int GetMipSize(int level)
+        {
+            return GetMipStride(level) * GetLevelHeight(level) * GetLevelDepth(level);
+        }
+
+        public int GetMipStride(int level)
+        {
+            return BitUtils.AlignUp(GetLevelWidth(level) * BytesPerPixel, 4);
+        }
+
+        private int GetLevelWidth(int level)
+        {
+            return BitUtils.DivRoundUp(GetLevelSize(Width, level), BlockWidth);
+        }
+
+        private int GetLevelHeight(int level)
+        {
+            return BitUtils.DivRoundUp(GetLevelSize(Height, level), BlockHeight);
+        }
+
+        private int GetLevelDepth(int level)
+        {
+            return Target == Target.Texture3D ? GetLevelSize(Depth, level) : GetLayers();
+        }
+
+        public int GetDepthOrLayers()
+        {
+            return Target == Target.Texture3D ? Depth : GetLayers();
+        }
+
+        public int GetLayers()
+        {
+            if (Target == Target.Texture2DArray ||
+                Target == Target.Texture2DMultisampleArray ||
+                Target == Target.CubemapArray)
+            {
+                return Depth;
+            }
+            else if (Target == Target.Cubemap)
+            {
+                return 6;
+            }
+
+            return 1;
+        }
+
+        private static int GetLevelSize(int size, int level)
+        {
+            return Math.Max(1, size >> level);
+        }
+    }
+}