1 files changed, 203 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Vulkan/FramebufferParams.cs b/Ryujinx.Graphics.Vulkan/FramebufferParams.cs
new file mode 100644
index 00000000..e5318e93
--- /dev/null
+++ b/Ryujinx.Graphics.Vulkan/FramebufferParams.cs
@@ -0,0 +1,203 @@
+using Ryujinx.Graphics.GAL;
+using Silk.NET.Vulkan;
+using System;
+using System.Linq;
+using VkFormat = Silk.NET.Vulkan.Format;
+
+namespace Ryujinx.Graphics.Vulkan
+{
+    class FramebufferParams
+    {
+        private readonly Device _device;
+        private readonly Auto<DisposableImageView>[] _attachments;
+        private readonly TextureView[] _colors;
+        private readonly TextureView _depthStencil;
+        private uint _validColorAttachments;
+
+        public uint Width { get; }
+        public uint Height { get; }
+        public uint Layers { get; }
+
+        public uint[] AttachmentSamples { get; }
+        public VkFormat[] AttachmentFormats { get; }
+        public int[] AttachmentIndices { get; }
+
+        public int AttachmentsCount { get; }
+        public int MaxColorAttachmentIndex { get; }
+        public bool HasDepthStencil { get; }
+        public int ColorAttachmentsCount => AttachmentsCount - (HasDepthStencil ? 1 : 0);
+
+        public FramebufferParams(
+            Device device,
+            Auto<DisposableImageView> view,
+            uint width,
+            uint height,
+            bool isDepthStencil,
+            VkFormat format)
+        {
+            _device = device;
+            _attachments = new[] { view };
+            _validColorAttachments = 1u;
+
+            Width = width;
+            Height = height;
+            Layers = 1;
+
+            AttachmentSamples = new[] { 1u };
+            AttachmentFormats = new[] { format };
+            AttachmentIndices = new[] { 0 };
+
+            AttachmentsCount = 1;
+
+            HasDepthStencil = isDepthStencil;
+        }
+
+        public FramebufferParams(Device device, ITexture[] colors, ITexture depthStencil)
+        {
+            _device = device;
+
+            int colorsCount = colors.Count(IsValidTextureView);
+
+            int count = colorsCount + (IsValidTextureView(depthStencil) ? 1 : 0);
+
+            _attachments = new Auto<DisposableImageView>[count];
+            _colors = new TextureView[colorsCount];
+
+            AttachmentSamples = new uint[count];
+            AttachmentFormats = new VkFormat[count];
+            AttachmentIndices = new int[count];
+            MaxColorAttachmentIndex = colors.Length - 1;
+
+            uint width = uint.MaxValue;
+            uint height = uint.MaxValue;
+            uint layers = uint.MaxValue;
+
+            int index = 0;
+            int bindIndex = 0;
+
+            foreach (ITexture color in colors)
+            {
+                if (IsValidTextureView(color))
+                {
+                    var texture = (TextureView)color;
+
+                    _attachments[index] = texture.GetImageViewForAttachment();
+                    _colors[index] = texture;
+                    _validColorAttachments |= 1u << bindIndex;
+
+                    AttachmentSamples[index] = (uint)texture.Info.Samples;
+                    AttachmentFormats[index] = texture.VkFormat;
+                    AttachmentIndices[index] = bindIndex;
+
+                    width = Math.Min(width, (uint)texture.Width);
+                    height = Math.Min(height, (uint)texture.Height);
+                    layers = Math.Min(layers, (uint)texture.Layers);
+
+                    if (++index >= colorsCount)
+                    {
+                        break;
+                    }
+                }
+
+                bindIndex++;
+            }
+
+            if (depthStencil is TextureView dsTexture && dsTexture.Valid)
+            {
+                _attachments[count - 1] = dsTexture.GetImageViewForAttachment();
+                _depthStencil = dsTexture;
+
+                AttachmentSamples[count - 1] = (uint)dsTexture.Info.Samples;
+                AttachmentFormats[count - 1] = dsTexture.VkFormat;
+
+                width = Math.Min(width, (uint)dsTexture.Width);
+                height = Math.Min(height, (uint)dsTexture.Height);
+                layers = Math.Min(layers, (uint)dsTexture.Layers);
+
+                HasDepthStencil = true;
+            }
+
+            if (count == 0)
+            {
+                width = height = layers = 1;
+            }
+
+            Width = width;
+            Height = height;
+            Layers = layers;
+
+            AttachmentsCount = count;
+        }
+
+        public Auto<DisposableImageView> GetAttachment(int index)
+        {
+            if ((uint)index >= _attachments.Length)
+            {
+                return null;
+            }
+
+            return _attachments[index];
+        }
+
+        public bool IsValidColorAttachment(int bindIndex)
+        {
+            return (uint)bindIndex < Constants.MaxRenderTargets && (_validColorAttachments & (1u << bindIndex)) != 0;
+        }
+
+        private static bool IsValidTextureView(ITexture texture)
+        {
+            return texture is TextureView view && view.Valid;
+        }
+
+        public ClearRect GetClearRect(Rectangle<int> scissor, int layer)
+        {
+            int x = scissor.X;
+            int y = scissor.Y;
+            int width = Math.Min((int)Width - scissor.X, scissor.Width);
+            int height = Math.Min((int)Height - scissor.Y, scissor.Height);
+
+            return new ClearRect(new Rect2D(new Offset2D(x, y), new Extent2D((uint)width, (uint)height)), (uint)layer, 1);
+        }
+
+        public unsafe Auto<DisposableFramebuffer> Create(Vk api, CommandBufferScoped cbs, Auto<DisposableRenderPass> renderPass)
+        {
+            ImageView* attachments = stackalloc ImageView[_attachments.Length];
+
+            for (int i = 0; i < _attachments.Length; i++)
+            {
+                attachments[i] = _attachments[i].Get(cbs).Value;
+            }
+
+            var framebufferCreateInfo = new FramebufferCreateInfo()
+            {
+                SType = StructureType.FramebufferCreateInfo,
+                RenderPass = renderPass.Get(cbs).Value,
+                AttachmentCount = (uint)_attachments.Length,
+                PAttachments = attachments,
+                Width = Width,
+                Height = Height,
+                Layers = Layers
+            };
+
+            api.CreateFramebuffer(_device, framebufferCreateInfo, null, out var framebuffer).ThrowOnError();
+            return new Auto<DisposableFramebuffer>(new DisposableFramebuffer(api, _device, framebuffer), null, _attachments);
+        }
+
+        public void UpdateModifications()
+        {
+            if (_colors != null)
+            {
+                for (int index = 0; index < _colors.Length; index++)
+                {
+                    _colors[index].Storage.SetModification(
+                        AccessFlags.AccessColorAttachmentWriteBit,
+                        PipelineStageFlags.PipelineStageColorAttachmentOutputBit);
+                }
+            }
+
+            _depthStencil?.Storage.SetModification(
+                AccessFlags.AccessDepthStencilAttachmentWriteBit,
+                PipelineStageFlags.PipelineStageColorAttachmentOutputBit);
+        }
+    }
+}