Ryujinx/Ryujinx.Graphics.Gpu/State/GpuState.cs

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using System;
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using System.Runtime.InteropServices;
namespace Ryujinx.Graphics.Gpu.State
{
/// <summary>
/// GPU state.
/// </summary>
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class GpuState
{
private const int RegistersCount = 0xe00;
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public delegate void MethodCallback(GpuState state, int argument);
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private readonly int[] _memory;
private readonly int[] _shadow;
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/// <summary>
/// GPU register information.
/// </summary>
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private struct Register
{
public MethodCallback Callback;
public MethodOffset BaseOffset;
public int Stride;
public int Count;
public bool Modified;
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}
private readonly Register[] _registers;
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/// <summary>
/// Gets or sets the shadow ram control used for this sub-channel.
/// </summary>
public ShadowRamControl ShadowRamControl { get; set; }
/// <summary>
/// Creates a new instance of the GPU state.
/// </summary>
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public GpuState()
{
_memory = new int[RegistersCount];
_shadow = new int[RegistersCount];
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_registers = new Register[RegistersCount];
for (int index = 0; index < _registers.Length; index++)
{
_registers[index].BaseOffset = (MethodOffset)index;
_registers[index].Stride = 1;
_registers[index].Count = 1;
_registers[index].Modified = true;
}
foreach (var item in GpuStateTable.Table)
{
int totalRegs = item.Size * item.Count;
for (int regOffset = 0; regOffset < totalRegs; regOffset++)
{
int index = (int)item.Offset + regOffset;
_registers[index].BaseOffset = item.Offset;
_registers[index].Stride = item.Size;
_registers[index].Count = item.Count;
}
}
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InitializeDefaultState(_memory);
InitializeDefaultState(_shadow);
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}
/// <summary>
/// Calls a GPU method, using this state.
/// </summary>
/// <param name="meth">The GPU method to be called</param>
public void CallMethod(MethodParams meth)
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{
int value = meth.Argument;
// Methods < 0x80 shouldn't be affected by shadow RAM at all.
if (meth.Method >= 0x80)
{
ShadowRamControl shadowCtrl = ShadowRamControl;
// TODO: Figure out what TrackWithFilter does, compared to Track.
if (shadowCtrl == ShadowRamControl.Track ||
shadowCtrl == ShadowRamControl.TrackWithFilter)
{
_shadow[meth.Method] = value;
}
else if (shadowCtrl == ShadowRamControl.Replay)
{
value = _shadow[meth.Method];
}
}
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Register register = _registers[meth.Method];
if (_memory[meth.Method] != value)
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{
_registers[(int)register.BaseOffset].Modified = true;
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}
_memory[meth.Method] = value;
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register.Callback?.Invoke(this, value);
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}
/// <summary>
/// Reads data from a GPU register at the given offset.
/// </summary>
/// <param name="offset">Offset to be read</param>
/// <returns>Data at the register</returns>
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public int Read(int offset)
{
return _memory[offset];
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}
/// <summary>
/// Writes data to the GPU register at the given offset.
/// </summary>
/// <param name="offset">Offset to be written</param>
/// <param name="value">Value to be written</param>
public void Write(int offset, int value)
{
_memory[offset] = value;
}
/// <summary>
/// Writes an offset value at the uniform buffer offset register.
/// </summary>
/// <param name="offset">The offset to be written</param>
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public void SetUniformBufferOffset(int offset)
{
_memory[(int)MethodOffset.UniformBufferState + 3] = offset;
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}
/// <summary>
/// Initializes registers with the default state.
/// </summary>
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private void InitializeDefaultState(int[] memory)
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{
// Enable Rasterizer
memory[(int)MethodOffset.RasterizeEnable] = 1;
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// Depth ranges.
for (int index = 0; index < Constants.TotalViewports; index++)
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{
memory[(int)MethodOffset.ViewportExtents + index * 4 + 2] = 0;
memory[(int)MethodOffset.ViewportExtents + index * 4 + 3] = 0x3F800000;
// Set swizzle to +XYZW
memory[(int)MethodOffset.ViewportTransform + index * 8 + 6] = 0x6420;
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}
// Viewport transform enable.
memory[(int)MethodOffset.ViewportTransformEnable] = 1;
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// Default front stencil mask.
memory[0x4e7] = 0xff;
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// Conditional rendering condition.
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memory[0x556] = (int)Condition.Always;
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// Default color mask.
for (int index = 0; index < Constants.TotalRenderTargets; index++)
{
memory[(int)MethodOffset.RtColorMask + index] = 0x1111;
}
// Default blend states
Set(MethodOffset.BlendStateCommon, BlendStateCommon.Default);
for (int index = 0; index < Constants.TotalRenderTargets; index++)
{
Set(MethodOffset.BlendState, index, BlendState.Default);
}
// Default Point Parameters
memory[(int)MethodOffset.PointSpriteEnable] = 1;
memory[(int)MethodOffset.PointSize] = 0x3F800000; // 1.0f
memory[(int)MethodOffset.PointCoordReplace] = 0x8; // Enable
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}
/// <summary>
/// Registers a callback that is called every time a GPU method, or methods are called.
/// </summary>
/// <param name="offset">Offset of the method</param>
/// <param name="count">Word count of the methods region</param>
/// <param name="callback">Calllback to be called</param>
public void RegisterCallback(MethodOffset offset, int count, MethodCallback callback)
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{
for (int index = 0; index < count; index++)
{
_registers[(int)offset + index].Callback = callback;
}
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}
/// <summary>
/// Registers a callback that is called every time a GPU method is called.
/// </summary>
/// <param name="offset">Offset of the method</param>
/// <param name="callback">Calllback to be called</param>
public void RegisterCallback(MethodOffset offset, MethodCallback callback)
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{
_registers[(int)offset].Callback = callback;
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}
/// <summary>
/// Checks if a given register has been modified since the last call to this method.
/// </summary>
/// <param name="offset">Register offset</param>
/// <returns>True if modified, false otherwise</returns>
public bool QueryModified(MethodOffset offset)
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{
bool modified = _registers[(int)offset].Modified;
_registers[(int)offset].Modified = false;
return modified;
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}
/// <summary>
/// Checks if two registers have been modified since the last call to this method.
/// </summary>
/// <param name="m1">First register offset</param>
/// <param name="m2">Second register offset</param>
/// <returns>True if any register was modified, false otherwise</returns>
public bool QueryModified(MethodOffset m1, MethodOffset m2)
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{
bool modified = _registers[(int)m1].Modified ||
_registers[(int)m2].Modified;
_registers[(int)m1].Modified = false;
_registers[(int)m2].Modified = false;
return modified;
}
/// <summary>
/// Checks if three registers have been modified since the last call to this method.
/// </summary>
/// <param name="m1">First register offset</param>
/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
/// <returns>True if any register was modified, false otherwise</returns>
public bool QueryModified(MethodOffset m1, MethodOffset m2, MethodOffset m3)
{
bool modified = _registers[(int)m1].Modified ||
_registers[(int)m2].Modified ||
_registers[(int)m3].Modified;
_registers[(int)m1].Modified = false;
_registers[(int)m2].Modified = false;
_registers[(int)m3].Modified = false;
return modified;
}
/// <summary>
/// Checks if four registers have been modified since the last call to this method.
/// </summary>
/// <param name="m1">First register offset</param>
/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
/// <param name="m4">Fourth register offset</param>
/// <returns>True if any register was modified, false otherwise</returns>
public bool QueryModified(MethodOffset m1, MethodOffset m2, MethodOffset m3, MethodOffset m4)
{
bool modified = _registers[(int)m1].Modified ||
_registers[(int)m2].Modified ||
_registers[(int)m3].Modified ||
_registers[(int)m4].Modified;
_registers[(int)m1].Modified = false;
_registers[(int)m2].Modified = false;
_registers[(int)m3].Modified = false;
_registers[(int)m4].Modified = false;
return modified;
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}
/// <summary>
/// Checks if five registers have been modified since the last call to this method.
/// </summary>
/// <param name="m1">First register offset</param>
/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
/// <param name="m4">Fourth register offset</param>
/// <param name="m5">Fifth register offset</param>
/// <returns>True if any register was modified, false otherwise</returns>
public bool QueryModified(
MethodOffset m1,
MethodOffset m2,
MethodOffset m3,
MethodOffset m4,
MethodOffset m5)
{
bool modified = _registers[(int)m1].Modified ||
_registers[(int)m2].Modified ||
_registers[(int)m3].Modified ||
_registers[(int)m4].Modified ||
_registers[(int)m5].Modified;
_registers[(int)m1].Modified = false;
_registers[(int)m2].Modified = false;
_registers[(int)m3].Modified = false;
_registers[(int)m4].Modified = false;
_registers[(int)m5].Modified = false;
return modified;
}
/// <summary>
/// Checks if six registers have been modified since the last call to this method.
/// </summary>
/// <param name="m1">First register offset</param>
/// <param name="m2">Second register offset</param>
/// <param name="m3">Third register offset</param>
/// <param name="m4">Fourth register offset</param>
/// <param name="m5">Fifth register offset</param>
/// <param name="m6">Sixth register offset</param>
/// <returns>True if any register was modified, false otherwise</returns>
public bool QueryModified(
MethodOffset m1,
MethodOffset m2,
MethodOffset m3,
MethodOffset m4,
MethodOffset m5,
MethodOffset m6)
{
bool modified = _registers[(int)m1].Modified ||
_registers[(int)m2].Modified ||
_registers[(int)m3].Modified ||
_registers[(int)m4].Modified ||
_registers[(int)m5].Modified ||
_registers[(int)m6].Modified;
_registers[(int)m1].Modified = false;
_registers[(int)m2].Modified = false;
_registers[(int)m3].Modified = false;
_registers[(int)m4].Modified = false;
_registers[(int)m5].Modified = false;
_registers[(int)m6].Modified = false;
return modified;
}
/// <summary>
/// Gets indexed data from a given register offset.
/// </summary>
/// <typeparam name="T">Type of the data</typeparam>
/// <param name="offset">Register offset</param>
/// <param name="index">Index for indexed data</param>
/// <returns>The data at the specified location</returns>
public T Get<T>(MethodOffset offset, int index) where T : unmanaged
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{
Register register = _registers[(int)offset];
if ((uint)index >= register.Count)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
return Get<T>(offset + index * register.Stride);
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}
/// <summary>
/// Gets data from a given register offset.
/// </summary>
/// <typeparam name="T">Type of the data</typeparam>
/// <param name="offset">Register offset</param>
/// <returns>The data at the specified location</returns>
public T Get<T>(MethodOffset offset) where T : unmanaged
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{
return MemoryMarshal.Cast<int, T>(_memory.AsSpan().Slice((int)offset))[0];
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}
/// <summary>
/// Gets a span of the data at a given register offset.
/// </summary>
/// <param name="offset">Register offset</param>
/// <param name="length">Length of the data in bytes</param>
/// <returns>The data at the specified location</returns>
public Span<byte> GetSpan(MethodOffset offset, int length)
{
return MemoryMarshal.Cast<int, byte>(_memory.AsSpan().Slice((int)offset)).Slice(0, length);
}
/// <summary>
/// Sets indexed data to a given register offset.
/// </summary>
/// <typeparam name="T">Type of the data</typeparam>
/// <param name="offset">Register offset</param>
/// <param name="index">Index for indexed data</param>
/// <param name="data">The data to set</param>
public void Set<T>(MethodOffset offset, int index, T data) where T : unmanaged
{
Register register = _registers[(int)offset];
if ((uint)index >= register.Count)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
Set(offset + index * register.Stride, data);
}
/// <summary>
/// Sets data to a given register offset.
/// </summary>
/// <typeparam name="T">Type of the data</typeparam>
/// <param name="offset">Register offset</param>
/// <param name="data">The data to set</param>
public void Set<T>(MethodOffset offset, T data) where T : unmanaged
{
ReadOnlySpan<int> intSpan = MemoryMarshal.Cast<T, int>(MemoryMarshal.CreateReadOnlySpan(ref data, 1));
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intSpan.CopyTo(_memory.AsSpan().Slice((int)offset, intSpan.Length));
}
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}
}