Ryujinx/Ryujinx.Graphics.OpenGL/Image/TextureCopy.cs

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using Ryujinx.Graphics.GAL;
using OpenTK.Graphics.OpenGL;
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using System;
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namespace Ryujinx.Graphics.OpenGL.Image
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{
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class TextureCopy : IDisposable
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{
private readonly Renderer _renderer;
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private int _srcFramebuffer;
private int _dstFramebuffer;
private int _copyPboHandle;
private int _copyPboSize;
public TextureCopy(Renderer renderer)
{
_renderer = renderer;
}
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public void Copy(
TextureView src,
TextureView dst,
Extents2D srcRegion,
Extents2D dstRegion,
bool linearFilter)
{
TextureView srcConverted = src.Format.IsBgra8() != dst.Format.IsBgra8() ? BgraSwap(src) : src;
(int oldDrawFramebufferHandle, int oldReadFramebufferHandle) = ((Pipeline)_renderer.Pipeline).GetBoundFramebuffers();
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GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, GetSrcFramebufferLazy());
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, GetDstFramebufferLazy());
Attach(FramebufferTarget.ReadFramebuffer, src.Format, srcConverted.Handle);
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Attach(FramebufferTarget.DrawFramebuffer, dst.Format, dst.Handle);
ClearBufferMask mask = GetMask(src.Format);
if ((mask & (ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit)) != 0 || src.Format.IsInteger())
{
linearFilter = false;
}
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BlitFramebufferFilter filter = linearFilter
? BlitFramebufferFilter.Linear
: BlitFramebufferFilter.Nearest;
GL.ReadBuffer(ReadBufferMode.ColorAttachment0);
GL.DrawBuffer(DrawBufferMode.ColorAttachment0);
GL.Disable(EnableCap.RasterizerDiscard);
GL.Disable(IndexedEnableCap.ScissorTest, 0);
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GL.BlitFramebuffer(
srcRegion.X1,
srcRegion.Y1,
srcRegion.X2,
srcRegion.Y2,
dstRegion.X1,
dstRegion.Y1,
dstRegion.X2,
dstRegion.Y2,
mask,
filter);
Attach(FramebufferTarget.ReadFramebuffer, src.Format, 0);
Attach(FramebufferTarget.DrawFramebuffer, dst.Format, 0);
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GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, oldReadFramebufferHandle);
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, oldDrawFramebufferHandle);
((Pipeline)_renderer.Pipeline).RestoreScissor0Enable();
((Pipeline)_renderer.Pipeline).RestoreRasterizerDiscard();
if (srcConverted != src)
{
srcConverted.Dispose();
}
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}
private static void Attach(FramebufferTarget target, Format format, int handle)
{
if (format == Format.D24UnormS8Uint || format == Format.D32FloatS8Uint)
{
GL.FramebufferTexture(target, FramebufferAttachment.DepthStencilAttachment, handle, 0);
}
else if (IsDepthOnly(format))
{
GL.FramebufferTexture(target, FramebufferAttachment.DepthAttachment, handle, 0);
}
else if (format == Format.S8Uint)
{
GL.FramebufferTexture(target, FramebufferAttachment.StencilAttachment, handle, 0);
}
else
{
GL.FramebufferTexture(target, FramebufferAttachment.ColorAttachment0, handle, 0);
}
}
private static ClearBufferMask GetMask(Format format)
{
if (format == Format.D24UnormS8Uint || format == Format.D32FloatS8Uint)
{
return ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit;
}
else if (IsDepthOnly(format))
{
return ClearBufferMask.DepthBufferBit;
}
else if (format == Format.S8Uint)
{
return ClearBufferMask.StencilBufferBit;
}
else
{
return ClearBufferMask.ColorBufferBit;
}
}
private static bool IsDepthOnly(Format format)
{
return format == Format.D16Unorm ||
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format == Format.D24X8Unorm ||
format == Format.D32Float;
}
public TextureView BgraSwap(TextureView from)
{
TextureView to = (TextureView)_renderer.CreateTexture(from.Info, from.ScaleFactor);
EnsurePbo(from);
GL.BindBuffer(BufferTarget.PixelPackBuffer, _copyPboHandle);
from.WriteToPbo(0, forceBgra: true);
GL.BindBuffer(BufferTarget.PixelPackBuffer, 0);
GL.BindBuffer(BufferTarget.PixelUnpackBuffer, _copyPboHandle);
to.ReadFromPbo(0, _copyPboSize);
GL.BindBuffer(BufferTarget.PixelUnpackBuffer, 0);
return to;
}
private void EnsurePbo(TextureView view)
{
int requiredSize = 0;
for (int level = 0; level < view.Info.Levels; level++)
{
requiredSize += view.Info.GetMipSize(level);
}
if (_copyPboSize < requiredSize && _copyPboHandle != 0)
{
GL.DeleteBuffer(_copyPboHandle);
_copyPboHandle = 0;
}
if (_copyPboHandle == 0)
{
_copyPboHandle = GL.GenBuffer();
_copyPboSize = requiredSize;
GL.BindBuffer(BufferTarget.PixelPackBuffer, _copyPboHandle);
GL.BufferData(BufferTarget.PixelPackBuffer, requiredSize, IntPtr.Zero, BufferUsageHint.DynamicCopy);
}
}
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private int GetSrcFramebufferLazy()
{
if (_srcFramebuffer == 0)
{
_srcFramebuffer = GL.GenFramebuffer();
}
return _srcFramebuffer;
}
private int GetDstFramebufferLazy()
{
if (_dstFramebuffer == 0)
{
_dstFramebuffer = GL.GenFramebuffer();
}
return _dstFramebuffer;
}
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public void Dispose()
{
if (_srcFramebuffer != 0)
{
GL.DeleteFramebuffer(_srcFramebuffer);
_srcFramebuffer = 0;
}
if (_dstFramebuffer != 0)
{
GL.DeleteFramebuffer(_dstFramebuffer);
_dstFramebuffer = 0;
}
if (_copyPboHandle != 0)
{
GL.DeleteBuffer(_copyPboHandle);
_copyPboHandle = 0;
}
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}
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}
}