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This seems to be the default value when the vertex attribute is disabled, or components aren't defined. This fixes a regression from #2307 in SMO where a plant in the Wooded Kingdom would draw slightly differently in the depth prepass, leading to depth test failing later on. GDK has stated that the specific case in Gundam only expects x and y to be 0, and Vulkan's undefined value for z does appear to be 0 when a vertex attribute type does not have that component, hence the value (0, 0, 0, 1). This worked in Vulkan despite also providing an all 0s attribute due to the vertex attribute binding being R32Float, so the other values were undefined. It should be changed there separately.
194 lines
5.9 KiB
C#
194 lines
5.9 KiB
C#
using OpenTK.Graphics.OpenGL;
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using Ryujinx.Graphics.GAL;
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using System;
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using System.Runtime.CompilerServices;
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namespace Ryujinx.Graphics.OpenGL
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{
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class VertexArray : IDisposable
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{
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public int Handle { get; private set; }
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private bool _needsAttribsUpdate;
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private readonly VertexAttribDescriptor[] _vertexAttribs;
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private readonly VertexBufferDescriptor[] _vertexBuffers;
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private int _vertexAttribsCount;
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private int _vertexBuffersCount;
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private uint _vertexAttribsInUse;
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private uint _vertexBuffersInUse;
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public VertexArray()
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{
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Handle = GL.GenVertexArray();
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_vertexAttribs = new VertexAttribDescriptor[Constants.MaxVertexAttribs];
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_vertexBuffers = new VertexBufferDescriptor[Constants.MaxVertexBuffers];
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}
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public void Bind()
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{
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GL.BindVertexArray(Handle);
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}
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public void SetVertexBuffers(ReadOnlySpan<VertexBufferDescriptor> vertexBuffers)
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{
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int bindingIndex;
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for (bindingIndex = 0; bindingIndex < vertexBuffers.Length; bindingIndex++)
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{
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VertexBufferDescriptor vb = vertexBuffers[bindingIndex];
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if (vb.Buffer.Handle != BufferHandle.Null)
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{
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GL.BindVertexBuffer(bindingIndex, vb.Buffer.Handle.ToInt32(), (IntPtr)vb.Buffer.Offset, vb.Stride);
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GL.VertexBindingDivisor(bindingIndex, vb.Divisor);
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_vertexBuffersInUse |= 1u << bindingIndex;
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}
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else
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{
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if ((_vertexBuffersInUse & (1u << bindingIndex)) != 0)
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{
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GL.BindVertexBuffer(bindingIndex, 0, IntPtr.Zero, 0);
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_vertexBuffersInUse &= ~(1u << bindingIndex);
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}
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}
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_vertexBuffers[bindingIndex] = vb;
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}
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_vertexBuffersCount = bindingIndex;
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_needsAttribsUpdate = true;
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}
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public void SetVertexAttributes(ReadOnlySpan<VertexAttribDescriptor> vertexAttribs)
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{
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int index = 0;
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for (; index < vertexAttribs.Length; index++)
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{
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VertexAttribDescriptor attrib = vertexAttribs[index];
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if (attrib.Equals(_vertexAttribs[index]))
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{
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continue;
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}
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FormatInfo fmtInfo = FormatTable.GetFormatInfo(attrib.Format);
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if (attrib.IsZero)
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{
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// Disabling the attribute causes the shader to read a constant value.
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// We currently set the constant to (0, 0, 0, 0).
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DisableVertexAttrib(index);
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}
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else
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{
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EnableVertexAttrib(index);
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}
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int offset = attrib.Offset;
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int size = fmtInfo.Components;
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bool isFloat = fmtInfo.PixelType == PixelType.Float ||
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fmtInfo.PixelType == PixelType.HalfFloat;
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if (isFloat || fmtInfo.Normalized || fmtInfo.Scaled)
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{
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VertexAttribType type = (VertexAttribType)fmtInfo.PixelType;
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GL.VertexAttribFormat(index, size, type, fmtInfo.Normalized, offset);
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}
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else
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{
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VertexAttribIntegerType type = (VertexAttribIntegerType)fmtInfo.PixelType;
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GL.VertexAttribIFormat(index, size, type, offset);
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}
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GL.VertexAttribBinding(index, attrib.BufferIndex);
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_vertexAttribs[index] = attrib;
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}
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_vertexAttribsCount = index;
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for (; index < Constants.MaxVertexAttribs; index++)
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{
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DisableVertexAttrib(index);
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}
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}
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public void SetIndexBuffer(BufferHandle buffer)
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{
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GL.BindBuffer(BufferTarget.ElementArrayBuffer, buffer.ToInt32());
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}
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public void Validate()
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{
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for (int attribIndex = 0; attribIndex < _vertexAttribsCount; attribIndex++)
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{
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VertexAttribDescriptor attrib = _vertexAttribs[attribIndex];
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if (!attrib.IsZero)
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{
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if ((uint)attrib.BufferIndex >= _vertexBuffersCount)
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{
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DisableVertexAttrib(attribIndex);
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continue;
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}
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if (_vertexBuffers[attrib.BufferIndex].Buffer.Handle == BufferHandle.Null)
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{
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DisableVertexAttrib(attribIndex);
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continue;
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}
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if (_needsAttribsUpdate)
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{
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EnableVertexAttrib(attribIndex);
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}
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}
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}
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_needsAttribsUpdate = false;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private void EnableVertexAttrib(int index)
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{
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uint mask = 1u << index;
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if ((_vertexAttribsInUse & mask) == 0)
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{
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_vertexAttribsInUse |= mask;
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GL.EnableVertexAttribArray(index);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private void DisableVertexAttrib(int index)
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{
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uint mask = 1u << index;
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if ((_vertexAttribsInUse & mask) != 0)
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{
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_vertexAttribsInUse &= ~mask;
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GL.DisableVertexAttribArray(index);
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GL.VertexAttrib4(index, 0f, 0f, 0f, 1f);
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}
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}
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public void Dispose()
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{
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if (Handle != 0)
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{
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GL.DeleteVertexArray(Handle);
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Handle = 0;
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}
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}
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}
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}
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