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using Ryujinx.Common.Logging;
using Ryujinx.Graphics.Gpu.State;
namespace Ryujinx.Graphics.Gpu.Engine
{
partial class Methods
{
/// <summary>
/// Checks if draws and clears should be performed, according
/// to currently set conditional rendering conditions.
/// </summary>
/// <param name="state">GPU state</param>
/// <returns>True if rendering is enabled, false otherwise</returns>
private bool GetRenderEnable(GpuState state)
{
ConditionState condState = state.Get<ConditionState>(MethodOffset.ConditionState);
switch (condState.Condition)
{
case Condition.Always:
return true;
case Condition.Never:
return false;
case Condition.ResultNonZero:
return CounterNonZero(condState.Address.Pack());
case Condition.Equal:
return CounterCompare(condState.Address.Pack(), true);
case Condition.NotEqual:
return CounterCompare(condState.Address.Pack(), false);
}
Logger.PrintWarning(LogClass.Gpu, $"Invalid conditional render condition \"{condState.Condition}\".");
return true;
}
/// <summary>
/// Checks if the counter value at a given GPU memory address is non-zero.
/// </summary>
/// <param name="gpuVa">GPU virtual address of the counter value</param>
/// <returns>True if the value is not zero, false otherwise</returns>
private bool CounterNonZero(ulong gpuVa)
{
if (!FindAndFlush(gpuVa))
{
return false;
}
return _context.MemoryAccessor.ReadUInt64(gpuVa) != 0;
}
/// <summary>
/// Checks if the counter at a given GPU memory address passes a specified equality comparison.
/// </summary>
/// <param name="gpuVa">GPU virtual address</param>
/// <param name="isEqual">True to check if the values are equal, false to check if they are not equal</param>
/// <returns>True if the condition is met, false otherwise</returns>
private bool CounterCompare(ulong gpuVa, bool isEqual)
{
if (!FindAndFlush(gpuVa) && !FindAndFlush(gpuVa + 16))
{
return false;
}
ulong x = _context.MemoryAccessor.ReadUInt64(gpuVa);
ulong y = _context.MemoryAccessor.ReadUInt64(gpuVa + 16);
return isEqual ? x == y : x != y;
}
/// <summary>
/// Tries to find a counter that is supposed to be written at the specified address,
/// flushing if necessary.
/// </summary>
/// <param name="gpuVa">GPU virtual address where the counter is supposed to be written</param>
/// <returns>True if a counter value is found at the specified address, false otherwise</returns>
private bool FindAndFlush(ulong gpuVa)
{
return _counterCache.Contains(gpuVa);
}
}
}
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