Implement texture buffers (#1152)

* Implement texture buffers

* Throw NotSupportedException where appropriate

5 files changed, 150 insertions, 65 deletions

diff --git a/Ryujinx.Graphics.OpenGL/Pipeline.cs b/Ryujinx.Graphics.OpenGL/Pipeline.cs
index eec2b643..e313595d 100644
--- a/Ryujinx.Graphics.OpenGL/Pipeline.cs
+++ b/Ryujinx.Graphics.OpenGL/Pipeline.cs
@@ -26,7 +26,7 @@ namespace Ryujinx.Graphics.OpenGL
         private bool _depthTest;
         private bool _hasDepthBuffer;
 
-        private TextureView _unit0Texture;
+        private TextureBase _unit0Texture;
 
         private ClipOrigin _clipOrigin;
         private ClipDepthMode _clipDepthMode;
@@ -616,13 +616,13 @@ namespace Ryujinx.Graphics.OpenGL
 
             if (unit != -1 && texture != null)
             {
-                TextureView view = (TextureView)texture;
+                TextureBase texBase = (TextureBase)texture;
 
-                FormatInfo formatInfo = FormatTable.GetFormatInfo(view.Format);
+                FormatInfo formatInfo = FormatTable.GetFormatInfo(texBase.Format);
 
                 SizedInternalFormat format = (SizedInternalFormat)formatInfo.PixelInternalFormat;
 
-                GL.BindImageTexture(unit, view.Handle, 0, true, 0, TextureAccess.ReadWrite, format);
+                GL.BindImageTexture(unit, texBase.Handle, 0, true, 0, TextureAccess.ReadWrite, format);
             }
         }
 
@@ -801,11 +801,11 @@ namespace Ryujinx.Graphics.OpenGL
             {
                 if (unit == 0)
                 {
-                    _unit0Texture = ((TextureView)texture);
+                    _unit0Texture = (TextureBase)texture;
                 }
                 else
                 {
-                    ((TextureView)texture).Bind(unit);
+                    ((TextureBase)texture).Bind(unit);
                 }
             }
         }
diff --git a/Ryujinx.Graphics.OpenGL/Renderer.cs b/Ryujinx.Graphics.OpenGL/Renderer.cs
index 504a947b..3f718345 100644
--- a/Ryujinx.Graphics.OpenGL/Renderer.cs
+++ b/Ryujinx.Graphics.OpenGL/Renderer.cs
@@ -20,19 +20,14 @@ namespace Ryujinx.Graphics.OpenGL
         internal TextureCopy TextureCopy { get; }
 
         public string GpuVendor { get; private set; }
-
         public string GpuRenderer { get; private set; }
-
         public string GpuVersion { get; private set; }
 
         public Renderer()
         {
             _pipeline = new Pipeline();
-
             _counters = new Counters();
-
             _window = new Window(this);
-
             TextureCopy = new TextureCopy(this);
         }
 
@@ -58,7 +53,7 @@ namespace Ryujinx.Graphics.OpenGL
 
         public ITexture CreateTexture(TextureCreateInfo info)
         {
-            return new TextureStorage(this, info).CreateDefaultView();
+            return info.Target == Target.TextureBuffer ? new TextureBuffer(info) : new TextureStorage(this, info).CreateDefaultView();
         }
 
         public Capabilities GetCapabilities()
diff --git a/Ryujinx.Graphics.OpenGL/TextureBase.cs b/Ryujinx.Graphics.OpenGL/TextureBase.cs
new file mode 100644
index 00000000..f4ab0bda
--- /dev/null
+++ b/Ryujinx.Graphics.OpenGL/TextureBase.cs
@@ -0,0 +1,39 @@
+using OpenTK.Graphics.OpenGL;
+using Ryujinx.Graphics.GAL;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Ryujinx.Graphics.OpenGL
+{
+    class TextureBase
+    {
+        public int Handle { get; protected set; }
+
+        protected TextureCreateInfo Info { get; }
+
+        public int Width => Info.Width;
+        public int Height => Info.Height;
+
+        public Target Target => Info.Target;
+        public Format Format => Info.Format;
+
+        public TextureBase(TextureCreateInfo info)
+        {
+            Info = info;
+
+            Handle = GL.GenTexture();
+        }
+
+        public void Bind(int unit)
+        {
+            Bind(Target.Convert(), unit);
+        }
+
+        protected void Bind(TextureTarget target, int unit)
+        {
+            GL.ActiveTexture(TextureUnit.Texture0 + unit);
+            GL.BindTexture(target, Handle);
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.OpenGL/TextureBuffer.cs b/Ryujinx.Graphics.OpenGL/TextureBuffer.cs
new file mode 100644
index 00000000..fb18c6ee
--- /dev/null
+++ b/Ryujinx.Graphics.OpenGL/TextureBuffer.cs
@@ -0,0 +1,71 @@
+using OpenTK.Graphics.OpenGL;
+using Ryujinx.Graphics.GAL;
+using System;
+
+namespace Ryujinx.Graphics.OpenGL
+{
+    class TextureBuffer : TextureBase, ITexture
+    {
+        private int _bufferOffset;
+        private int _bufferSize;
+
+        private Buffer _buffer;
+
+        public TextureBuffer(TextureCreateInfo info) : base(info) {}
+
+        public void CopyTo(ITexture destination, int firstLayer, int firstLevel)
+        {
+            throw new NotSupportedException();
+        }
+
+        public void CopyTo(ITexture destination, Extents2D srcRegion, Extents2D dstRegion, bool linearFilter)
+        {
+            throw new NotSupportedException();
+        }
+
+        public ITexture CreateView(TextureCreateInfo info, int firstLayer, int firstLevel)
+        {
+            throw new NotSupportedException();
+        }
+
+        public byte[] GetData()
+        {
+            return _buffer?.GetData(_bufferOffset, _bufferSize);
+        }
+
+        public void SetData(ReadOnlySpan<byte> data)
+        {
+            _buffer?.SetData(_bufferOffset, data.Slice(0, Math.Min(data.Length, _bufferSize)));
+        }
+
+        public void SetStorage(BufferRange buffer)
+        {
+            if (buffer.Buffer == _buffer &&
+                buffer.Offset == _bufferOffset &&
+                buffer.Size == _bufferSize)
+            {
+                return;
+            }
+
+            _buffer = (Buffer)buffer.Buffer;
+            _bufferOffset = buffer.Offset;
+            _bufferSize = buffer.Size;
+
+            Bind(0);
+
+            SizedInternalFormat format = (SizedInternalFormat)FormatTable.GetFormatInfo(Info.Format).PixelInternalFormat;
+
+            GL.TexBufferRange(TextureBufferTarget.TextureBuffer, format, _buffer.Handle, (IntPtr)buffer.Offset, buffer.Size);
+        }
+
+        public void Dispose()
+        {
+            if (Handle != 0)
+            {
+                GL.DeleteTexture(Handle);
+
+                Handle = 0;
+            }
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.OpenGL/TextureView.cs b/Ryujinx.Graphics.OpenGL/TextureView.cs
index cb872880..0ab59d42 100644
--- a/Ryujinx.Graphics.OpenGL/TextureView.cs
+++ b/Ryujinx.Graphics.OpenGL/TextureView.cs
@@ -4,10 +4,8 @@ using System;
 
 namespace Ryujinx.Graphics.OpenGL
 {
-    class TextureView : ITexture
+    class TextureView : TextureBase, ITexture
     {
-        public int Handle { get; private set; }
-
         private readonly Renderer _renderer;
 
         private readonly TextureStorage _parent;
@@ -16,33 +14,22 @@ namespace Ryujinx.Graphics.OpenGL
 
         private TextureView _incompatibleFormatView;
 
-        private readonly TextureCreateInfo _info;
-
         public int FirstLayer { get; private set; }
         public int FirstLevel { get; private set; }
 
-        public int Width  => _info.Width;
-        public int Height => _info.Height;
-
-        public Target Target => _info.Target;
-        public Format Format => _info.Format;
-
         public TextureView(
             Renderer          renderer,
             TextureStorage    parent,
             TextureCreateInfo info,
             int               firstLayer,
-            int               firstLevel)
+            int               firstLevel) : base(info)
         {
             _renderer = renderer;
             _parent   = parent;
-            _info     = info;
 
             FirstLayer = firstLayer;
             FirstLevel = firstLevel;
 
-            Handle = GL.GenTexture();
-
             CreateView();
         }
 
@@ -50,7 +37,7 @@ namespace Ryujinx.Graphics.OpenGL
         {
             TextureTarget target = Target.Convert();
 
-            FormatInfo format = FormatTable.GetFormatInfo(_info.Format);
+            FormatInfo format = FormatTable.GetFormatInfo(Info.Format);
 
             PixelInternalFormat pixelInternalFormat;
 
@@ -69,9 +56,9 @@ namespace Ryujinx.Graphics.OpenGL
                 _parent.Handle,
                 pixelInternalFormat,
                 FirstLevel,
-                _info.Levels,
+                Info.Levels,
                 FirstLayer,
-                _info.GetLayers());
+                Info.GetLayers());
 
             GL.ActiveTexture(TextureUnit.Texture0);
 
@@ -79,15 +66,15 @@ namespace Ryujinx.Graphics.OpenGL
 
             int[] swizzleRgba = new int[]
             {
-                (int)_info.SwizzleR.Convert(),
-                (int)_info.SwizzleG.Convert(),
-                (int)_info.SwizzleB.Convert(),
-                (int)_info.SwizzleA.Convert()
+                (int)Info.SwizzleR.Convert(),
+                (int)Info.SwizzleG.Convert(),
+                (int)Info.SwizzleB.Convert(),
+                (int)Info.SwizzleA.Convert()
             };
 
             GL.TexParameter(target, TextureParameterName.TextureSwizzleRgba, swizzleRgba);
 
-            int maxLevel = _info.Levels - 1;
+            int maxLevel = Info.Levels - 1;
 
             if (maxLevel < 0)
             {
@@ -95,12 +82,12 @@ namespace Ryujinx.Graphics.OpenGL
             }
 
             GL.TexParameter(target, TextureParameterName.TextureMaxLevel, maxLevel);
-            GL.TexParameter(target, TextureParameterName.DepthStencilTextureMode, (int)_info.DepthStencilMode.Convert());
+            GL.TexParameter(target, TextureParameterName.DepthStencilTextureMode, (int)Info.DepthStencilMode.Convert());
         }
 
         public ITexture CreateView(TextureCreateInfo info, int firstLayer, int firstLevel)
         {
-            if (_info.IsCompressed == info.IsCompressed)
+            if (Info.IsCompressed == info.IsCompressed)
             {
                 firstLayer += FirstLayer;
                 firstLevel += FirstLevel;
@@ -135,10 +122,10 @@ namespace Ryujinx.Graphics.OpenGL
             {
                 if (_incompatibleFormatView == null)
                 {
-                    _incompatibleFormatView = (TextureView)_renderer.CreateTexture(_info);
+                    _incompatibleFormatView = (TextureView)_renderer.CreateTexture(Info);
                 }
 
-                TextureCopyUnscaled.Copy(_parent.Info, _incompatibleFormatView._info, _parent.Handle, _incompatibleFormatView.Handle, FirstLayer, 0, FirstLevel, 0);
+                TextureCopyUnscaled.Copy(_parent.Info, _incompatibleFormatView.Info, _parent.Handle, _incompatibleFormatView.Handle, FirstLayer, 0, FirstLevel, 0);
 
                 return _incompatibleFormatView.Handle;
             }
@@ -150,7 +137,7 @@ namespace Ryujinx.Graphics.OpenGL
         {
             if (_incompatibleFormatView != null)
             {
-                TextureCopyUnscaled.Copy(_incompatibleFormatView._info, _parent.Info, _incompatibleFormatView.Handle, _parent.Handle, 0, FirstLayer, 0, FirstLevel);
+                TextureCopyUnscaled.Copy(_incompatibleFormatView.Info, _parent.Info, _incompatibleFormatView.Handle, _parent.Handle, 0, FirstLayer, 0, FirstLevel);
             }
         }
 
@@ -158,13 +145,13 @@ namespace Ryujinx.Graphics.OpenGL
         {
             TextureView destinationView = (TextureView)destination;
 
-            TextureCopyUnscaled.Copy(_info, destinationView._info, Handle, destinationView.Handle, 0, firstLayer, 0, firstLevel);
+            TextureCopyUnscaled.Copy(Info, destinationView.Info, Handle, destinationView.Handle, 0, firstLayer, 0, firstLevel);
 
             if (destinationView._emulatedViewParent != null)
             {
                 TextureCopyUnscaled.Copy(
-                    _info,
-                    destinationView._emulatedViewParent._info,
+                    Info,
+                    destinationView._emulatedViewParent.Info,
                     Handle,
                     destinationView._emulatedViewParent.Handle,
                     0,
@@ -183,9 +170,9 @@ namespace Ryujinx.Graphics.OpenGL
         {
             int size = 0;
 
-            for (int level = 0; level < _info.Levels; level++)
+            for (int level = 0; level < Info.Levels; level++)
             {
-                size += _info.GetMipSize(level);
+                size += Info.GetMipSize(level);
             }
 
             byte[] data = new byte[size];
@@ -207,7 +194,7 @@ namespace Ryujinx.Graphics.OpenGL
 
             Bind(target, 0);
 
-            FormatInfo format = FormatTable.GetFormatInfo(_info.Format);
+            FormatInfo format = FormatTable.GetFormatInfo(Info.Format);
 
             int faces = 1;
 
@@ -218,11 +205,11 @@ namespace Ryujinx.Graphics.OpenGL
                 faces = 6;
             }
 
-            for (int level = 0; level < _info.Levels; level++)
+            for (int level = 0; level < Info.Levels; level++)
             {
                 for (int face = 0; face < faces; face++)
                 {
-                    int faceOffset = face * _info.GetMipSize2D(level);
+                    int faceOffset = face * Info.GetMipSize2D(level);
 
                     if (format.IsCompressed)
                     {
@@ -239,7 +226,7 @@ namespace Ryujinx.Graphics.OpenGL
                     }
                 }
 
-                ptr += _info.GetMipSize(level);
+                ptr += Info.GetMipSize(level);
             }
         }
 
@@ -260,17 +247,17 @@ namespace Ryujinx.Graphics.OpenGL
 
             Bind(target, 0);
 
-            FormatInfo format = FormatTable.GetFormatInfo(_info.Format);
+            FormatInfo format = FormatTable.GetFormatInfo(Info.Format);
 
-            int width  = _info.Width;
-            int height = _info.Height;
-            int depth  = _info.Depth;
+            int width  = Info.Width;
+            int height = Info.Height;
+            int depth  = Info.Depth;
 
             int offset = 0;
 
-            for (int level = 0; level < _info.Levels; level++)
+            for (int level = 0; level < Info.Levels; level++)
             {
-                int mipSize = _info.GetMipSize(level);
+                int mipSize = Info.GetMipSize(level);
 
                 int endOffset = offset + mipSize;
 
@@ -279,7 +266,7 @@ namespace Ryujinx.Graphics.OpenGL
                     return;
                 }
 
-                switch (_info.Target)
+                switch (Info.Target)
                 {
                     case Target.Texture1D:
                         if (format.IsCompressed)
@@ -419,16 +406,9 @@ namespace Ryujinx.Graphics.OpenGL
             }
         }
 
-        public void Bind(int unit)
+        public void SetStorage(BufferRange buffer)
         {
-            Bind(Target.Convert(), unit);
-        }
-
-        private void Bind(TextureTarget target, int unit)
-        {
-            GL.ActiveTexture(TextureUnit.Texture0 + unit);
-
-            GL.BindTexture(target, Handle);
+            throw new NotSupportedException();
         }
 
         public void Dispose()