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using Ryujinx.Graphics.GAL;
namespace Ryujinx.Graphics.Gpu.Engine.Threed.Blender
{
/// <summary>
/// Fixed function alpha state used for a advanced blend function.
/// </summary>
readonly struct FixedFunctionAlpha
{
/// <summary>
/// Fixed function alpha state with alpha blending disabled.
/// </summary>
public static FixedFunctionAlpha Disabled => new(BlendUcodeEnable.EnableRGBA, default, default, default);
/// <summary>
/// Individual enable bits for the RGB and alpha components.
/// </summary>
public BlendUcodeEnable Enable { get; }
/// <summary>
/// Alpha blend operation.
/// </summary>
public BlendOp AlphaOp { get; }
/// <summary>
/// Value multiplied with the blend source operand.
/// </summary>
public BlendFactor AlphaSrcFactor { get; }
/// <summary>
/// Value multiplied with the blend destination operand.
/// </summary>
public BlendFactor AlphaDstFactor { get; }
/// <summary>
/// Creates a new blend fixed function alpha state.
/// </summary>
/// <param name="enable">Individual enable bits for the RGB and alpha components</param>
/// <param name="alphaOp">Alpha blend operation</param>
/// <param name="alphaSrc">Value multiplied with the blend source operand</param>
/// <param name="alphaDst">Value multiplied with the blend destination operand</param>
public FixedFunctionAlpha(BlendUcodeEnable enable, BlendOp alphaOp, BlendFactor alphaSrc, BlendFactor alphaDst)
{
Enable = enable;
AlphaOp = alphaOp;
AlphaSrcFactor = alphaSrc;
AlphaDstFactor = alphaDst;
}
/// <summary>
/// Creates a new blend fixed function alpha state.
/// </summary>
/// <param name="alphaOp">Alpha blend operation</param>
/// <param name="alphaSrc">Value multiplied with the blend source operand</param>
/// <param name="alphaDst">Value multiplied with the blend destination operand</param>
public FixedFunctionAlpha(BlendOp alphaOp, BlendFactor alphaSrc, BlendFactor alphaDst) : this(BlendUcodeEnable.EnableRGB, alphaOp, alphaSrc, alphaDst)
{
}
}
/// <summary>
/// Blend microcode assembly function delegate.
/// </summary>
/// <param name="asm">Assembler</param>
/// <returns>Fixed function alpha state for the microcode</returns>
delegate FixedFunctionAlpha GenUcodeFunc(ref UcodeAssembler asm);
/// <summary>
/// Advanced blend microcode state.
/// </summary>
readonly struct AdvancedBlendUcode
{
/// <summary>
/// Advanced blend operation.
/// </summary>
public AdvancedBlendOp Op { get; }
/// <summary>
/// Advanced blend overlap mode.
/// </summary>
public AdvancedBlendOverlap Overlap { get; }
/// <summary>
/// Whenever the source input is pre-multiplied.
/// </summary>
public bool SrcPreMultiplied { get; }
/// <summary>
/// Fixed function alpha state.
/// </summary>
public FixedFunctionAlpha Alpha { get; }
/// <summary>
/// Microcode.
/// </summary>
public uint[] Code { get; }
/// <summary>
/// Constants used by the microcode.
/// </summary>
public RgbFloat[] Constants { get; }
/// <summary>
/// Creates a new advanced blend state.
/// </summary>
/// <param name="op">Advanced blend operation</param>
/// <param name="overlap">Advanced blend overlap mode</param>
/// <param name="srcPreMultiplied">Whenever the source input is pre-multiplied</param>
/// <param name="genFunc">Function that will generate the advanced blend microcode</param>
public AdvancedBlendUcode(
AdvancedBlendOp op,
AdvancedBlendOverlap overlap,
bool srcPreMultiplied,
GenUcodeFunc genFunc)
{
Op = op;
Overlap = overlap;
SrcPreMultiplied = srcPreMultiplied;
UcodeAssembler asm = new();
Alpha = genFunc(ref asm);
Code = asm.GetCode();
Constants = asm.GetConstants();
}
}
}
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