Initial work

Ryujinx.Graphics.OpenGL/ComputePipeline.cs

@@ -0,0 +1,95 @@
+using OpenTK.Graphics.OpenGL;
+using Ryujinx.Graphics.GAL;
+using Ryujinx.Graphics.Shader;
+using System;
+
+namespace Ryujinx.Graphics.OpenGL
+{
+    class ComputePipeline : IComputePipeline
+    {
+        private Renderer _renderer;
+
+        private Program _program;
+
+        public ComputePipeline(Renderer renderer)
+        {
+            _renderer = renderer;
+        }
+
+        public void Dispatch(int groupsX, int groupsY, int groupsZ)
+        {
+            BindProgram();
+
+            GL.DispatchCompute(groupsX, groupsY, groupsZ);
+
+            UnbindProgram();
+        }
+
+        public void SetProgram(IProgram program)
+        {
+            _program = (Program)program;
+        }
+
+        public void SetStorageBuffer(int index, BufferRange buffer)
+        {
+            BindProgram();
+
+            BindBuffer(index, buffer, isStorage: true);
+
+            UnbindProgram();
+        }
+
+        public void SetUniformBuffer(int index, BufferRange buffer)
+        {
+            BindProgram();
+
+            BindBuffer(index, buffer, isStorage: false);
+
+            UnbindProgram();
+        }
+
+        private void BindBuffer(int index, BufferRange buffer, bool isStorage)
+        {
+            int bindingPoint = isStorage
+                ? _program.GetStorageBufferBindingPoint(ShaderStage.Compute, index)
+                : _program.GetUniformBufferBindingPoint(ShaderStage.Compute, index);
+
+            if (bindingPoint == -1)
+            {
+                return;
+            }
+
+            BufferRangeTarget target = isStorage
+                ? BufferRangeTarget.ShaderStorageBuffer
+                : BufferRangeTarget.UniformBuffer;
+
+            if (buffer.Buffer == null)
+            {
+                GL.BindBufferRange(target, bindingPoint, 0, IntPtr.Zero, 0);
+
+                return;
+            }
+
+            int bufferHandle = ((Buffer)buffer.Buffer).Handle;
+
+            IntPtr bufferOffset = (IntPtr)buffer.Offset;
+
+            GL.BindBufferRange(
+                target,
+                bindingPoint,
+                bufferHandle,
+                bufferOffset,
+                buffer.Size);
+        }
+
+        private void BindProgram()
+        {
+            _program.Bind();
+        }
+
+        private void UnbindProgram()
+        {
+            ((GraphicsPipeline)_renderer.GraphicsPipeline).RebindProgram();
+        }
+    }
+}