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@@ -0,0 +1,232 @@
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+using Ryujinx.Graphics.GAL;
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+using Ryujinx.Graphics.Shader;
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+using System;
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+using System.Runtime.CompilerServices;
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+using System.Runtime.InteropServices;
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+
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+namespace Ryujinx.Graphics.Gpu.Memory
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+{
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+ /// <summary>
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+ /// Support buffer data updater.
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+ /// </summary>
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+ class SupportBufferUpdater : IDisposable
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+ {
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+ private SupportBuffer _data;
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+ private BufferHandle _handle;
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+
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+ private readonly IRenderer _renderer;
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+ private int _startOffset = -1;
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+ private int _endOffset = -1;
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+
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+ /// <summary>
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+ /// Creates a new instance of the support buffer updater.
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+ /// </summary>
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+ /// <param name="renderer">Renderer that the support buffer will be used with</param>
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+ public SupportBufferUpdater(IRenderer renderer)
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+ {
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+ _renderer = renderer;
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+
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+ var defaultScale = new Vector4<float> { X = 1f, Y = 0f, Z = 0f, W = 0f };
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+ _data.RenderScale.AsSpan().Fill(defaultScale);
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+ DirtyRenderScale(0, SupportBuffer.RenderScaleMaxCount);
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+ }
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+
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+ /// <summary>
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+ /// Mark a region of the support buffer as modified and needing to be sent to the GPU.
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+ /// </summary>
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+ /// <param name="startOffset">Start offset of the region in bytes</param>
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+ /// <param name="byteSize">Size of the region in bytes</param>
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+ private void MarkDirty(int startOffset, int byteSize)
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+ {
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+ int endOffset = startOffset + byteSize;
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+
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+ if (_startOffset == -1)
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+ {
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+ _startOffset = startOffset;
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+ _endOffset = endOffset;
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+ }
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+ else
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+ {
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+ if (startOffset < _startOffset)
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+ {
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+ _startOffset = startOffset;
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+ }
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+
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+ if (endOffset > _endOffset)
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+ {
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+ _endOffset = endOffset;
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+ }
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Marks the fragment render scale count as being modified.
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+ /// </summary>
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+ private void DirtyFragmentRenderScaleCount()
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+ {
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+ MarkDirty(SupportBuffer.FragmentRenderScaleCountOffset, sizeof(int));
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+ }
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+
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+ /// <summary>
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+ /// Marks data of a given type as being modified.
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+ /// </summary>
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+ /// <typeparam name="T">Type of the data</typeparam>
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+ /// <param name="baseOffset">Base offset of the data in bytes</param>
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+ /// <param name="offset">Index of the data, in elements</param>
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+ /// <param name="count">Number of elements</param>
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+ private void DirtyGenericField<T>(int baseOffset, int offset, int count) where T : unmanaged
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+ {
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+ int elemSize = Unsafe.SizeOf<T>();
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+
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+ MarkDirty(baseOffset + offset * elemSize, count * elemSize);
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+ }
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+
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+ /// <summary>
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+ /// Marks render scales as being modified.
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+ /// </summary>
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+ /// <param name="offset">Index of the first scale that was modified</param>
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+ /// <param name="count">Number of modified scales</param>
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+ private void DirtyRenderScale(int offset, int count)
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+ {
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+ DirtyGenericField<Vector4<float>>(SupportBuffer.GraphicsRenderScaleOffset, offset, count);
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+ }
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+
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+ /// <summary>
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+ /// Marks render target BGRA format state as modified.
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+ /// </summary>
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+ /// <param name="offset">Index of the first render target that had its BGRA format modified</param>
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+ /// <param name="count">Number of render targets</param>
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+ private void DirtyFragmentIsBgra(int offset, int count)
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+ {
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+ DirtyGenericField<Vector4<int>>(SupportBuffer.FragmentIsBgraOffset, offset, count);
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+ }
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+
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+ /// <summary>
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+ /// Updates the inverse viewport vector.
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+ /// </summary>
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+ /// <param name="data">Inverse viewport vector</param>
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+ private void UpdateViewportInverse(Vector4<float> data)
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+ {
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+ _data.ViewportInverse = data;
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+
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+ MarkDirty(SupportBuffer.ViewportInverseOffset, SupportBuffer.FieldSize);
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+ }
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+
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+ /// <summary>
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+ /// Sets the scale of all output render targets (they should all have the same scale).
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+ /// </summary>
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+ /// <param name="scale">Scale value</param>
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+ public void SetRenderTargetScale(float scale)
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+ {
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+ _data.RenderScale[0].X = scale;
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+ DirtyRenderScale(0, 1); // Just the first element.
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+ }
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+
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+ /// <summary>
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+ /// Updates the render scales for shader input textures or images.
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+ /// </summary>
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+ /// <param name="scales">Scale values</param>
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+ /// <param name="totalCount">Total number of scales across all stages</param>
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+ /// <param name="fragmentCount">Total number of scales on the fragment shader stage</param>
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+ public void UpdateRenderScale(ReadOnlySpan<float> scales, int totalCount, int fragmentCount)
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+ {
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+ bool changed = false;
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+
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+ for (int index = 0; index < totalCount; index++)
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+ {
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+ if (_data.RenderScale[1 + index].X != scales[index])
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+ {
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+ _data.RenderScale[1 + index].X = scales[index];
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+ changed = true;
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+ }
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+ }
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+
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+ // Only update fragment count if there are scales after it for the vertex stage.
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+ if (fragmentCount != totalCount && fragmentCount != _data.FragmentRenderScaleCount.X)
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+ {
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+ _data.FragmentRenderScaleCount.X = fragmentCount;
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+ DirtyFragmentRenderScaleCount();
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+ }
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+
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+ if (changed)
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+ {
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+ DirtyRenderScale(0, 1 + totalCount);
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Sets whether the format of a given render target is a BGRA format.
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+ /// </summary>
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+ /// <param name="index">Render target index</param>
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+ /// <param name="isBgra">True if the format is BGRA< false otherwise</param>
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+ public void SetRenderTargetIsBgra(int index, bool isBgra)
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+ {
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+ bool isBgraChanged = (_data.FragmentIsBgra[index].X != 0) != isBgra;
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+
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+ if (isBgraChanged)
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+ {
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+ _data.FragmentIsBgra[index].X = isBgra ? 1 : 0;
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+ DirtyFragmentIsBgra(index, 1);
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Sets whether a viewport has transform disabled.
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+ /// </summary>
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+ /// <param name="viewportWidth">Value used as viewport width</param>
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+ /// <param name="viewportHeight">Value used as viewport height</param>
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+ /// <param name="scale">Render target scale</param>
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+ /// <param name="disableTransform">True if transform is disabled, false otherwise</param>
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+ public void SetViewportTransformDisable(float viewportWidth, float viewportHeight, float scale, bool disableTransform)
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+ {
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+ float disableTransformF = disableTransform ? 1.0f : 0.0f;
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+ if (_data.ViewportInverse.W != disableTransformF || disableTransform)
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+ {
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+ UpdateViewportInverse(new Vector4<float>
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+ {
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+ X = scale * 2f / viewportWidth,
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+ Y = scale * 2f / viewportHeight,
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+ Z = 1,
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+ W = disableTransformF
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+ });
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Submits all pending buffer updates to the GPU.
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+ /// </summary>
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+ public void Commit()
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+ {
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+ if (_startOffset != -1)
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+ {
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+ if (_handle == BufferHandle.Null)
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+ {
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+ _handle = _renderer.CreateBuffer(SupportBuffer.RequiredSize);
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+ _renderer.Pipeline.ClearBuffer(_handle, 0, SupportBuffer.RequiredSize, 0);
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+
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+ var range = new BufferRange(_handle, 0, SupportBuffer.RequiredSize);
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+ _renderer.Pipeline.SetUniformBuffers(stackalloc[] { new BufferAssignment(0, range) });
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+ }
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+
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+ ReadOnlySpan<byte> data = MemoryMarshal.Cast<SupportBuffer, byte>(MemoryMarshal.CreateSpan(ref _data, 1));
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+
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+ _renderer.SetBufferData(_handle, _startOffset, data.Slice(_startOffset, _endOffset - _startOffset));
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+
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+ _startOffset = -1;
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+ _endOffset = -1;
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Destroys the support buffer.
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+ /// </summary>
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+ public void Dispose()
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+ {
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+ if (_handle != BufferHandle.Null)
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+ {
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+ _renderer.DeleteBuffer(_handle);
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+ _handle = BufferHandle.Null;
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+ }
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+ }
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+ }
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+}
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