300 lines
11 KiB
C#
300 lines
11 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace Ryujinx.Graphics.Gpu.State
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{
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/// <summary>
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/// GPU state.
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/// </summary>
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class GpuState
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{
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private const int RegistersCount = 0xe00;
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public delegate void MethodCallback(GpuState state, int argument);
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private int[] _backingMemory;
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/// <summary>
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/// GPU register information.
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/// </summary>
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private struct Register
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{
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public MethodCallback Callback;
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public MethodOffset BaseOffset;
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public int Stride;
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public int Count;
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public bool Modified;
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}
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private Register[] _registers;
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/// <summary>
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/// Creates a new instance of the GPU state.
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/// </summary>
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public GpuState()
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{
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_backingMemory = new int[RegistersCount];
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_registers = new Register[RegistersCount];
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for (int index = 0; index < _registers.Length; index++)
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{
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_registers[index].BaseOffset = (MethodOffset)index;
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_registers[index].Stride = 1;
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_registers[index].Count = 1;
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_registers[index].Modified = true;
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}
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foreach (var item in GpuStateTable.Table)
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{
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int totalRegs = item.Size * item.Count;
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for (int regOffset = 0; regOffset < totalRegs; regOffset++)
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{
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int index = (int)item.Offset + regOffset;
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_registers[index].BaseOffset = item.Offset;
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_registers[index].Stride = item.Size;
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_registers[index].Count = item.Count;
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}
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}
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InitializeDefaultState();
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}
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/// <summary>
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/// Calls a GPU method, using this state.
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/// </summary>
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/// <param name="meth">The GPU method to be called</param>
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public void CallMethod(MethodParams meth)
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{
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Register register = _registers[meth.Method];
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if (_backingMemory[meth.Method] != meth.Argument)
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{
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_registers[(int)register.BaseOffset].Modified = true;
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}
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_backingMemory[meth.Method] = meth.Argument;
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register.Callback?.Invoke(this, meth.Argument);
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}
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/// <summary>
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/// Reads data from a GPU register at the given offset.
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/// </summary>
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/// <param name="offset">Offset to be read</param>
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/// <returns>Data at the register</returns>
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public int Read(int offset)
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{
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return _backingMemory[offset];
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}
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/// <summary>
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/// Writes data to the GPU register at the given offset.
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/// </summary>
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/// <param name="offset">Offset to be written</param>
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/// <param name="value">Value to be written</param>
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public void Write(int offset, int value)
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{
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_backingMemory[offset] = value;
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}
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/// <summary>
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/// Writes an offset value at the uniform buffer offset register.
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/// </summary>
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/// <param name="offset">The offset to be written</param>
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public void SetUniformBufferOffset(int offset)
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{
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_backingMemory[(int)MethodOffset.UniformBufferState + 3] = offset;
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}
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/// <summary>
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/// Initializes registers with the default state.
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/// </summary>
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private void InitializeDefaultState()
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{
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// Depth ranges.
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for (int index = 0; index < 8; index++)
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{
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_backingMemory[(int)MethodOffset.ViewportExtents + index * 4 + 2] = 0;
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_backingMemory[(int)MethodOffset.ViewportExtents + index * 4 + 3] = 0x3F800000;
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}
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// Viewport transform enable.
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_backingMemory[(int)MethodOffset.ViewportTransformEnable] = 1;
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// Default front stencil mask.
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_backingMemory[0x4e7] = 0xff;
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// Default color mask.
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for (int index = 0; index < Constants.TotalRenderTargets; index++)
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{
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_backingMemory[(int)MethodOffset.RtColorMask + index] = 0x1111;
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}
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}
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/// <summary>
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/// Registers a callback that is called every time a GPU method, or methods are called.
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/// </summary>
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/// <param name="offset">Offset of the method</param>
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/// <param name="count">Word count of the methods region</param>
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/// <param name="callback">Calllback to be called</param>
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public void RegisterCallback(MethodOffset offset, int count, MethodCallback callback)
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{
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for (int index = 0; index < count; index++)
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{
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_registers[(int)offset + index].Callback = callback;
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}
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}
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/// <summary>
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/// Registers a callback that is called every time a GPU method is called.
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/// </summary>
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/// <param name="offset">Offset of the method</param>
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/// <param name="callback">Calllback to be called</param>
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public void RegisterCallback(MethodOffset offset, MethodCallback callback)
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{
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_registers[(int)offset].Callback = callback;
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}
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/// <summary>
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/// Checks if a given register has been modified since the last call to this method.
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/// </summary>
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/// <param name="offset">Register offset</param>
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/// <returns>True if modified, false otherwise</returns>
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public bool QueryModified(MethodOffset offset)
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{
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bool modified = _registers[(int)offset].Modified;
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_registers[(int)offset].Modified = false;
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return modified;
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}
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/// <summary>
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/// Checks if two registers have been modified since the last call to this method.
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/// </summary>
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/// <param name="m1">First register offset</param>
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/// <param name="m2">Second register offset</param>
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/// <returns>True if any register was modified, false otherwise</returns>
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public bool QueryModified(MethodOffset m1, MethodOffset m2)
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{
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bool modified = _registers[(int)m1].Modified ||
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_registers[(int)m2].Modified;
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_registers[(int)m1].Modified = false;
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_registers[(int)m2].Modified = false;
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return modified;
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}
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/// <summary>
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/// Checks if two registers have been modified since the last call to this method.
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/// </summary>
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/// <param name="m1">First register offset</param>
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/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
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/// <returns>True if any register was modified, false otherwise</returns>
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public bool QueryModified(MethodOffset m1, MethodOffset m2, MethodOffset m3)
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{
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bool modified = _registers[(int)m1].Modified ||
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_registers[(int)m2].Modified ||
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_registers[(int)m3].Modified;
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_registers[(int)m1].Modified = false;
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_registers[(int)m2].Modified = false;
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_registers[(int)m3].Modified = false;
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return modified;
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}
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/// <summary>
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/// Checks if two registers have been modified since the last call to this method.
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/// </summary>
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/// <param name="m1">First register offset</param>
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/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
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/// <param name="m4">Fourth register offset</param>
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/// <returns>True if any register was modified, false otherwise</returns>
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public bool QueryModified(MethodOffset m1, MethodOffset m2, MethodOffset m3, MethodOffset m4)
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{
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bool modified = _registers[(int)m1].Modified ||
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_registers[(int)m2].Modified ||
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_registers[(int)m3].Modified ||
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_registers[(int)m4].Modified;
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_registers[(int)m1].Modified = false;
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_registers[(int)m2].Modified = false;
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_registers[(int)m3].Modified = false;
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_registers[(int)m4].Modified = false;
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return modified;
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}
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/// <summary>
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/// Checks if two registers have been modified since the last call to this method.
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/// </summary>
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/// <param name="m1">First register offset</param>
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/// <param name="m2">Second register offset</param>
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/// <param name="m3">Third register offset</param>
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/// <param name="m4">Fourth register offset</param>
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/// <param name="m5">Fifth register offset</param>
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/// <returns>True if any register was modified, false otherwise</returns>
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public bool QueryModified(
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MethodOffset m1,
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MethodOffset m2,
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MethodOffset m3,
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MethodOffset m4,
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MethodOffset m5)
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{
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bool modified = _registers[(int)m1].Modified ||
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_registers[(int)m2].Modified ||
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_registers[(int)m3].Modified ||
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_registers[(int)m4].Modified ||
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_registers[(int)m5].Modified;
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_registers[(int)m1].Modified = false;
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_registers[(int)m2].Modified = false;
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_registers[(int)m3].Modified = false;
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_registers[(int)m4].Modified = false;
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_registers[(int)m5].Modified = false;
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return modified;
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}
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/// <summary>
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/// Gets indexed data from a given register offset.
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/// </summary>
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/// <typeparam name="T">Type of the data</typeparam>
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/// <param name="offset">Register offset</param>
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/// <param name="index">Index for indexed data</param>
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/// <returns>The data at the specified location</returns>
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public T Get<T>(MethodOffset offset, int index) where T : struct
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{
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Register register = _registers[(int)offset];
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if ((uint)index >= register.Count)
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{
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throw new ArgumentOutOfRangeException(nameof(index));
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}
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return Get<T>(offset + index * register.Stride);
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}
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/// <summary>
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/// Gets data from a given register offset.
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/// </summary>
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/// <typeparam name="T">Type of the data</typeparam>
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/// <param name="offset">Register offset</param>
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/// <returns>The data at the specified location</returns>
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public T Get<T>(MethodOffset offset) where T : struct
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{
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return MemoryMarshal.Cast<int, T>(_backingMemory.AsSpan().Slice((int)offset))[0];
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}
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}
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}
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