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using OpenTK.Graphics.OpenGL;
using System;
namespace Ryujinx.Graphics.Gal.OpenGL
{
class OGLRasterizer : IGalRasterizer
{
private const long MaxVertexBufferCacheSize = 128 * 1024 * 1024;
private const long MaxIndexBufferCacheSize = 64 * 1024 * 1024;
private int[] VertexBuffers;
private OGLCachedResource<int> VboCache;
private OGLCachedResource<int> IboCache;
private struct IbInfo
{
public int Count;
public int ElemSizeLog2;
public DrawElementsType Type;
}
private IbInfo IndexBuffer;
public OGLRasterizer()
{
VertexBuffers = new int[32];
VboCache = new OGLCachedResource<int>(GL.DeleteBuffer, MaxVertexBufferCacheSize);
IboCache = new OGLCachedResource<int>(GL.DeleteBuffer, MaxIndexBufferCacheSize);
IndexBuffer = new IbInfo();
}
public void LockCaches()
{
VboCache.Lock();
IboCache.Lock();
}
public void UnlockCaches()
{
VboCache.Unlock();
IboCache.Unlock();
}
public void ClearBuffers(
GalClearBufferFlags Flags,
int Attachment,
float Red,
float Green,
float Blue,
float Alpha,
float Depth,
int Stencil)
{
GL.ColorMask(
Attachment,
Flags.HasFlag(GalClearBufferFlags.ColorRed),
Flags.HasFlag(GalClearBufferFlags.ColorGreen),
Flags.HasFlag(GalClearBufferFlags.ColorBlue),
Flags.HasFlag(GalClearBufferFlags.ColorAlpha));
GL.ClearBuffer(ClearBuffer.Color, Attachment, new float[] { Red, Green, Blue, Alpha });
GL.ColorMask(Attachment, true, true, true, true);
GL.DepthMask(true);
if (Flags.HasFlag(GalClearBufferFlags.Depth))
{
GL.ClearBuffer(ClearBuffer.Depth, 0, ref Depth);
}
if (Flags.HasFlag(GalClearBufferFlags.Stencil))
{
GL.ClearBuffer(ClearBuffer.Stencil, 0, ref Stencil);
}
}
public bool IsVboCached(long Key, long DataSize)
{
return VboCache.TryGetSize(Key, out long Size) && Size == DataSize;
}
public bool IsIboCached(long Key, long DataSize)
{
return IboCache.TryGetSize(Key, out long Size) && Size == DataSize;
}
public void CreateVbo(long Key, int DataSize, IntPtr HostAddress)
{
int Handle = GL.GenBuffer();
VboCache.AddOrUpdate(Key, Handle, DataSize);
IntPtr Length = new IntPtr(DataSize);
GL.BindBuffer(BufferTarget.ArrayBuffer, Handle);
GL.BufferData(BufferTarget.ArrayBuffer, Length, HostAddress, BufferUsageHint.StreamDraw);
}
public void CreateVbo(long Key, byte[] Data)
{
int Handle = GL.GenBuffer();
VboCache.AddOrUpdate(Key, Handle, Data.Length);
IntPtr Length = new IntPtr(Data.Length);
GL.BindBuffer(BufferTarget.ArrayBuffer, Handle);
GL.BufferData(BufferTarget.ArrayBuffer, Length, Data, BufferUsageHint.StreamDraw);
}
public void CreateIbo(long Key, int DataSize, IntPtr HostAddress)
{
int Handle = GL.GenBuffer();
IboCache.AddOrUpdate(Key, Handle, (uint)DataSize);
IntPtr Length = new IntPtr(DataSize);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, Handle);
GL.BufferData(BufferTarget.ElementArrayBuffer, Length, HostAddress, BufferUsageHint.StreamDraw);
}
public void CreateIbo(long Key, int DataSize, byte[] Buffer)
{
int Handle = GL.GenBuffer();
IboCache.AddOrUpdate(Key, Handle, DataSize);
IntPtr Length = new IntPtr(Buffer.Length);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, Handle);
GL.BufferData(BufferTarget.ElementArrayBuffer, Length, Buffer, BufferUsageHint.StreamDraw);
}
public void SetIndexArray(int Size, GalIndexFormat Format)
{
IndexBuffer.Type = OGLEnumConverter.GetDrawElementsType(Format);
IndexBuffer.Count = Size >> (int)Format;
IndexBuffer.ElemSizeLog2 = (int)Format;
}
public void DrawArrays(int First, int Count, GalPrimitiveType PrimType)
{
if (Count == 0)
{
return;
}
if (PrimType == GalPrimitiveType.Quads)
{
for (int Offset = 0; Offset < Count; Offset += 4)
{
GL.DrawArrays(PrimitiveType.TriangleFan, First + Offset, 4);
}
}
else if (PrimType == GalPrimitiveType.QuadStrip)
{
GL.DrawArrays(PrimitiveType.TriangleFan, First, 4);
for (int Offset = 2; Offset < Count; Offset += 2)
{
GL.DrawArrays(PrimitiveType.TriangleFan, First + Offset, 4);
}
}
else
{
GL.DrawArrays(OGLEnumConverter.GetPrimitiveType(PrimType), First, Count);
}
}
public void DrawElements(long IboKey, int First, int VertexBase, GalPrimitiveType PrimType)
{
if (!IboCache.TryGetValue(IboKey, out int IboHandle))
{
return;
}
PrimitiveType Mode = OGLEnumConverter.GetPrimitiveType(PrimType);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, IboHandle);
First <<= IndexBuffer.ElemSizeLog2;
if (VertexBase != 0)
{
IntPtr Indices = new IntPtr(First);
GL.DrawElementsBaseVertex(Mode, IndexBuffer.Count, IndexBuffer.Type, Indices, VertexBase);
}
else
{
GL.DrawElements(Mode, IndexBuffer.Count, IndexBuffer.Type, First);
}
}
public bool TryGetVbo(long VboKey, out int VboHandle)
{
return VboCache.TryGetValue(VboKey, out VboHandle);
}
}
}
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