internal static BlendOperation BlendOperationFromOgl(BlendEquationMode bom)
{
switch (bom)
{
case BlendEquationMode.FuncAdd:
return(BlendOperation.Add);
break;
case BlendEquationMode.Min:
return(BlendOperation.Minimum);
break;
case BlendEquationMode.Max:
return(BlendOperation.Maximum);
break;
case BlendEquationMode.FuncSubtract:
return(BlendOperation.Subtract);
break;
case BlendEquationMode.FuncReverseSubtract:
return(BlendOperation.ReverseSubtract);
break;
default:
throw new ArgumentOutOfRangeException("bom");
}
}
public static void BlendEquationOES(BlendEquationMode mode)
{
Debug.Assert(Delegates.pglBlendEquationOES != null, "pglBlendEquationOES not implemented");
Delegates.pglBlendEquationOES((Int32)mode);
LogCommand("glBlendEquationOES", null, mode);
DebugCheckErrors(null);
}
internal BlendState(GraphicsDevice device, BlendStateDescription blendStateDescription) : base(device)
{
Description = blendStateDescription;
for (int i = 1; i < Description.RenderTargets.Length; ++i)
{
if (Description.RenderTargets[i].BlendEnable || Description.RenderTargets[i].ColorWriteChannels != ColorWriteChannels.All)
{
throw new NotSupportedException();
}
}
blendEnable = Description.RenderTargets[0].BlendEnable;
blendEquationModeColor = ToOpenGL(Description.RenderTargets[0].ColorBlendFunction);
blendEquationModeAlpha = ToOpenGL(Description.RenderTargets[0].AlphaBlendFunction);
blendFactorSrcColor = ToOpenGL(Description.RenderTargets[0].ColorSourceBlend);
blendFactorSrcAlpha = ToOpenGL(Description.RenderTargets[0].AlphaSourceBlend);
blendFactorDestColor = (BlendingFactorDest)ToOpenGL(Description.RenderTargets[0].ColorDestinationBlend);
blendFactorDestAlpha = (BlendingFactorDest)ToOpenGL(Description.RenderTargets[0].AlphaDestinationBlend);
EnabledColors[0] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Red) != 0;
EnabledColors[1] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Green) != 0;
EnabledColors[2] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Blue) != 0;
EnabledColors[3] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Alpha) != 0;
blendEquationHash = (uint)Description.RenderTargets[0].ColorBlendFunction
| ((uint)Description.RenderTargets[0].AlphaBlendFunction << 8);
blendFuncHash = (uint)Description.RenderTargets[0].ColorSourceBlend
| ((uint)Description.RenderTargets[0].AlphaSourceBlend << 8)
| ((uint)Description.RenderTargets[0].ColorDestinationBlend << 16)
| ((uint)Description.RenderTargets[0].AlphaDestinationBlend << 24);
}
/// <summary>
/// Initializes a new custom instance of the <see cref="SurfaceBlendSetting"/> class.
/// </summary>
/// <param name="src">The <see cref="BlendingFactorSrc"/>.</param>
/// <param name="dest">The <see cref="BlendingFactorDest"/>.</param>
/// <param name="equation">The <see cref="BlendEquationMode"/>.</param>
public SurfaceBlendSetting(BlendingFactorSrc src, BlendingFactorDest dest, BlendEquationMode equation)
: base(true)
{
this.srcBlend = src;
this.destBlend = dest;
this.equation = equation;
}
internal unsafe BlendState(BlendStateDescription blendStateDescription, bool hasRenderTarget)
{
var renderTargets = &blendStateDescription.RenderTarget0;
for (int i = 1; i < 8; ++i)
{
if (renderTargets[i].BlendEnable || renderTargets[i].ColorWriteChannels != ColorWriteChannels.All)
throw new NotSupportedException();
}
ColorWriteChannels = blendStateDescription.RenderTarget0.ColorWriteChannels;
if (!hasRenderTarget)
ColorWriteChannels = 0;
blendEnable = blendStateDescription.RenderTarget0.BlendEnable;
blendEquationModeColor = ToOpenGL(blendStateDescription.RenderTarget0.ColorBlendFunction);
blendEquationModeAlpha = ToOpenGL(blendStateDescription.RenderTarget0.AlphaBlendFunction);
blendFactorSrcColor = ToOpenGL(blendStateDescription.RenderTarget0.ColorSourceBlend);
blendFactorSrcAlpha = ToOpenGL(blendStateDescription.RenderTarget0.AlphaSourceBlend);
blendFactorDestColor = (BlendingFactorDest)ToOpenGL(blendStateDescription.RenderTarget0.ColorDestinationBlend);
blendFactorDestAlpha = (BlendingFactorDest)ToOpenGL(blendStateDescription.RenderTarget0.AlphaDestinationBlend);
blendEquationHash = (uint)blendStateDescription.RenderTarget0.ColorBlendFunction
| ((uint)blendStateDescription.RenderTarget0.AlphaBlendFunction << 8);
blendFuncHash = (uint)blendStateDescription.RenderTarget0.ColorSourceBlend
| ((uint)blendStateDescription.RenderTarget0.AlphaSourceBlend << 8)
| ((uint)blendStateDescription.RenderTarget0.ColorDestinationBlend << 16)
| ((uint)blendStateDescription.RenderTarget0.AlphaDestinationBlend << 24);
}
internal BlendState(GraphicsDevice device, BlendStateDescription blendStateDescription) : base(device)
{
Description = blendStateDescription;
for (int i = 1; i < Description.RenderTargets.Length; ++i)
{
if (Description.RenderTargets[i].BlendEnable || Description.RenderTargets[i].ColorWriteChannels != ColorWriteChannels.All)
throw new NotSupportedException();
}
blendEnable = Description.RenderTargets[0].BlendEnable;
blendEquationModeColor = ToOpenGL(Description.RenderTargets[0].ColorBlendFunction);
blendEquationModeAlpha = ToOpenGL(Description.RenderTargets[0].AlphaBlendFunction);
blendFactorSrcColor = ToOpenGL(Description.RenderTargets[0].ColorSourceBlend);
blendFactorSrcAlpha = ToOpenGL(Description.RenderTargets[0].AlphaSourceBlend);
blendFactorDestColor = (BlendingFactorDest)ToOpenGL(Description.RenderTargets[0].ColorDestinationBlend);
blendFactorDestAlpha = (BlendingFactorDest)ToOpenGL(Description.RenderTargets[0].AlphaDestinationBlend);
EnabledColors[0] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Red ) != 0;
EnabledColors[1] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Green) != 0;
EnabledColors[2] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Blue ) != 0;
EnabledColors[3] = (Description.RenderTargets[0].ColorWriteChannels & ColorWriteChannels.Alpha) != 0;
blendEquationHash = (uint)Description.RenderTargets[0].ColorBlendFunction
| ((uint)Description.RenderTargets[0].AlphaBlendFunction << 8);
blendFuncHash = (uint)Description.RenderTargets[0].ColorSourceBlend
| ((uint)Description.RenderTargets[0].AlphaSourceBlend << 8)
| ((uint)Description.RenderTargets[0].ColorDestinationBlend << 16)
| ((uint)Description.RenderTargets[0].AlphaDestinationBlend << 24);
}
/// <summary>
/// Initializes a new custom instance of the <see cref="SurfaceBlendSetting"/> class.
/// </summary>
/// <param name="src">The <see cref="BlendingFactorSrc"/>.</param>
/// <param name="dest">The <see cref="BlendingFactorDest"/>.</param>
/// <param name="equation">The <see cref="BlendEquationMode"/>.</param>
public SurfaceBlendSetting(BlendingFactorSrc src, BlendingFactorDest dest, BlendEquationMode equation)
: base(true)
{
this.srcBlend = src;
this.destBlend = dest;
this.equation = equation;
}
public static void BlendEquationSeparateOES(BlendEquationMode modeRGB, BlendEquationMode modeAlpha)
{
Debug.Assert(Delegates.pglBlendEquationSeparateOES != null, "pglBlendEquationSeparateOES not implemented");
Delegates.pglBlendEquationSeparateOES((int)modeRGB, (int)modeAlpha);
LogCommand("glBlendEquationSeparateOES", null, modeRGB, modeAlpha);
DebugCheckErrors(null);
}
public BlendingInfo(BlendingParameters parameters)
{
switch (parameters.Mode)
{
case BlendingMode.Inherit:
case BlendingMode.Mixture:
Source = BlendingFactorSrc.SrcAlpha;
Destination = BlendingFactorDest.OneMinusSrcAlpha;
SourceAlpha = BlendingFactorSrc.One;
DestinationAlpha = BlendingFactorDest.One;
break;
case BlendingMode.Additive:
Source = BlendingFactorSrc.SrcAlpha;
Destination = BlendingFactorDest.One;
SourceAlpha = BlendingFactorSrc.One;
DestinationAlpha = BlendingFactorDest.One;
break;
default:
Source = BlendingFactorSrc.One;
Destination = BlendingFactorDest.Zero;
SourceAlpha = BlendingFactorSrc.One;
DestinationAlpha = BlendingFactorDest.Zero;
break;
}
RGBEquation = translateEquation(parameters.RGBEquation);
AlphaEquation = translateEquation(parameters.AlphaEquation);
}
internal unsafe BlendState(BlendStateDescription blendStateDescription, bool hasRenderTarget)
{
var renderTargets = &blendStateDescription.RenderTarget0;
for (int i = 1; i < 8; ++i)
{
if (renderTargets[i].BlendEnable || renderTargets[i].ColorWriteChannels != ColorWriteChannels.All)
{
throw new NotSupportedException();
}
}
ColorWriteChannels = blendStateDescription.RenderTarget0.ColorWriteChannels;
if (!hasRenderTarget)
{
ColorWriteChannels = 0;
}
blendEnable = blendStateDescription.RenderTarget0.BlendEnable;
blendEquationModeColor = ToOpenGL(blendStateDescription.RenderTarget0.ColorBlendFunction);
blendEquationModeAlpha = ToOpenGL(blendStateDescription.RenderTarget0.AlphaBlendFunction);
blendFactorSrcColor = ToOpenGL(blendStateDescription.RenderTarget0.ColorSourceBlend);
blendFactorSrcAlpha = ToOpenGL(blendStateDescription.RenderTarget0.AlphaSourceBlend);
blendFactorDestColor = (BlendingFactorDest)ToOpenGL(blendStateDescription.RenderTarget0.ColorDestinationBlend);
blendFactorDestAlpha = (BlendingFactorDest)ToOpenGL(blendStateDescription.RenderTarget0.AlphaDestinationBlend);
blendEquationHash = (uint)blendStateDescription.RenderTarget0.ColorBlendFunction
| ((uint)blendStateDescription.RenderTarget0.AlphaBlendFunction << 8);
blendFuncHash = (uint)blendStateDescription.RenderTarget0.ColorSourceBlend
| ((uint)blendStateDescription.RenderTarget0.AlphaSourceBlend << 8)
| ((uint)blendStateDescription.RenderTarget0.ColorDestinationBlend << 16)
| ((uint)blendStateDescription.RenderTarget0.AlphaDestinationBlend << 24);
}
/// <summary>
///
/// </summary>
/// <param name="enabled"></param>
/// <param name="sourceFactor"></param>
/// <param name="destinationFactor"></param>
/// <param name="blendingEquationRgb"></param>
/// <param name="blendingEquationAlpha"></param>
public AlphaBlendSettings(bool enabled, BlendingFactor sourceFactor, BlendingFactor destinationFactor,
BlendEquationMode blendingEquationRgb, BlendEquationMode blendingEquationAlpha)
{
this.enabled = enabled;
this.sourceFactor = sourceFactor;
this.destinationFactor = destinationFactor;
this.blendingEquationRgb = blendingEquationRgb;
this.blendingEquationAlpha = blendingEquationAlpha;
}
internal static BlendOp Convert(BlendEquationMode blendOp)
{
if (!blendOps.ContainsValue(blendOp))
{
throw new NotSupportedException("blend is not supported");
}
return(blendOps.First((f) => f.Value == blendOp).Key);
}
public BlendMode(BlendingFactorSrc srcRgb, BlendingFactorDest dstRgb, BlendingFactorSrc srcAlpha, BlendingFactorDest dstAlpha, BlendEquationMode modeRgb = BlendEquationMode.FuncAdd, BlendEquationMode modeAlpha = BlendEquationMode.FuncAdd)
{
BlendSrcRgb = srcRgb;
BlendDstRgb = dstRgb;
BlendSrcAlpha = srcAlpha;
BlendDstAlpha = dstAlpha;
BlendModeRgb = modeRgb;
BlendModeAlpha = modeAlpha;
}
public IBlendState CreateBlendState(
BlendingFactorSrc colorSource,
BlendEquationMode colorEquation,
BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource,
BlendEquationMode alphaEquation,
BlendingFactorDest alphaDest)
{
return(new CacheBlendState(true, colorSource, colorEquation, colorDest, alphaSource, alphaEquation, alphaDest));
}
/// <summary>
/// specify pixel arithmetic for RGB and alpha components separately.
/// </summary>
/// <param name="rgbMode">set the RGB blend equation.</param>
/// <param name="alphaMode">set the Alpha blend equation.</param>
/// <param name="rgbSrcFactor">Specifies how the red, green and blue source blending factors are computedThe initial value is GL_ONE.</param>
/// <param name="rgbDestFactor">Specifies how the red, green and blue destination blending factors are computed. The initial value is GL_ZERO.</param>
/// <param name="alphaSrcFactor">Specifies how the alpha source blending factors are computed. The initial value is GL_ONE.</param>
/// <param name="alphaDestFactor">Specifies how the alpha destination blending factors are computed. The initial value is GL_ZERO.</param>
/// <param name="enableCapacity"></param>
public BlendSwitch(BlendEquationMode rgbMode, BlendEquationMode alphaMode, BlendSrcFactor rgbSrcFactor, BlendDestFactor rgbDestFactor, BlendSrcFactor alphaSrcFactor, BlendDestFactor alphaDestFactor, bool enableCapacity = true)
: base(GL.GL_BLEND, enableCapacity)
{
this.RGBMode = rgbMode;
this.AlphaMode = alphaMode;
this.RGBSrcFactor = rgbSrcFactor;
this.RGBDestFactor = rgbDestFactor;
this.AlphaSrcFactor = alphaSrcFactor;
this.AlphaDestFactor = alphaDestFactor;
}
public MyBlendState(bool enabled, BlendingFactorSrc colorSource, BlendEquationMode colorEquation, BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource, BlendEquationMode alphaEquation, BlendingFactorDest alphaDest)
{
this.enabled = enabled;
this.colorSource = (global::OpenTK.Graphics.OpenGL.BlendingFactorSrc)colorSource;
this.colorEquation = (global::OpenTK.Graphics.OpenGL.BlendEquationMode)colorEquation;
this.colorDest = (global::OpenTK.Graphics.OpenGL.BlendingFactorDest)colorDest;
this.alphaSource = (global::OpenTK.Graphics.OpenGL.BlendingFactorSrc)alphaSource;
this.alphaEquation = (global::OpenTK.Graphics.OpenGL.BlendEquationMode)alphaEquation;
this.alphaDest = (global::OpenTK.Graphics.OpenGL.BlendingFactorDest)alphaDest;
}
private BlendOperation ConvertBlendOp(BlendEquationMode glMode)
{
return(glMode switch
{
BlendEquationMode.FuncAdd => BlendOperation.Add,
BlendEquationMode.FuncSubtract => BlendOperation.Subtract,
BlendEquationMode.Max => BlendOperation.Maximum,
BlendEquationMode.Min => BlendOperation.Minimum,
BlendEquationMode.FuncReverseSubtract => BlendOperation.ReverseSubtract,
_ => throw new ArgumentOutOfRangeException()
});
public BlendState()
{
_alphaBlendFunction = BlendEquationMode.FuncAdd;
_alphaDestinationBlend = BlendingFactorDest.Zero;
_alphaSourceBlend = BlendingFactorSrc.One;
_colorBlendFunction = BlendEquationMode.FuncAdd;
_colorDestinationBlend = BlendingFactorDest.Zero;
_colorSourceBlend = BlendingFactorSrc.One;
_colorWriteChannels = ColorWriteChannels.All;
_blendColor = new Color4(0, 0, 0, 0);
_dirty = true;
}
/// <summary>
/// Construct a BlendState with separated RGB/Alpha functions.
/// </summary>
/// <param name="rgbEquation">
/// A <see cref="BlendEquationMode"/> flag indicating which equation to used for blending RGB color components.
/// </param>
/// <param name="alphaEquation">
/// A <see cref="BlendEquationMode"/> flag indicating which equation to used for blending Alpha color component.
/// </param>
/// <param name="srcRgbFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to the source color (alpha component excluded).
/// </param>
/// <param name="srcAlphaFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to only the source alpha component.
/// </param>
/// <param name="dstRgbFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to the destination color (alpha component excluded).
/// </param>
/// <param name="dstAlphaFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to only the destination alpha component.
/// </param>
/// <param name="constColor">
/// A <see cref="ColorRGBAF"/> that specify the constant color used in blending functions.
/// </param>
public BlendState(BlendEquationMode rgbEquation, BlendEquationMode alphaEquation, BlendingFactor srcRgbFactor, BlendingFactor srcAlphaFactor, BlendingFactor dstRgbFactor, BlendingFactor dstAlphaFactor, ColorRGBAF constColor)
{
if (IsSupportedEquation(rgbEquation) == false)
{
throw new ArgumentException("not supported blending equation " + srcRgbFactor, "rgbEquation");
}
if (IsSupportedEquation(alphaEquation) == false)
{
throw new ArgumentException("not supported blending equation " + alphaEquation, "rgbEquation");
}
if (IsSupportedFunction(srcRgbFactor) == false)
{
throw new ArgumentException("not supported blending function " + srcRgbFactor, "srcRgbFactor");
}
if (IsSupportedFunction(srcAlphaFactor) == false)
{
throw new ArgumentException("not supported blending function " + srcAlphaFactor, "srcAlphaFactor");
}
if (IsSupportedFunction(dstRgbFactor) == false)
{
throw new ArgumentException("not supported blending function " + dstRgbFactor, "dstRgbFactor");
}
if (IsSupportedFunction(dstAlphaFactor) == false)
{
throw new ArgumentException("not supported blending function " + dstAlphaFactor, "dstAlphaFactor");
}
// Blend enabled
_Enabled = true;
// Store RGB separate equation
_RgbEquation = rgbEquation;
// Store alpha separate equation
_AlphaEquation = alphaEquation;
// Store rgb separate function
_RgbSrcFactor = srcRgbFactor;
_RgbDstFactor = dstRgbFactor;
// Store alpha separate function
_AlphaSrcFactor = srcAlphaFactor;
_AlphaDstFactor = dstAlphaFactor;
// Store blend color
_BlendColor = constColor;
if (EquationSeparated && !Gl.CurrentExtensions.BlendEquationSeparate_EXT)
{
throw new InvalidOperationException("not supported separated blending equations");
}
if (FunctionSeparated && !Gl.CurrentExtensions.BlendFuncSeparate_EXT)
{
throw new InvalidOperationException("not supported separated blending functions");
}
}
/// <summary>
/// Construct a new BlendType
/// </summary>
/// <param name="srcColor">Source RGB factor</param>
/// <param name="destColor">Destination RGB factor</param>
/// <param name="srcAlpha">Source alpha factor</param>
/// <param name="destAlpha">Destination alpha factor</param>
/// <param name="equationColor">RGB equation</param>
/// <param name="equationAlpha">Alpha equation</param>
public BlendType(
BlendingFactorSrc srcColor, BlendingFactorDest destColor,
BlendingFactorSrc srcAlpha, BlendingFactorDest destAlpha,
BlendEquationMode equationColor = BlendEquationMode.FuncAdd,
BlendEquationMode equationAlpha = BlendEquationMode.FuncAdd
)
{
SrcColor = srcColor;
DestColor = destColor;
SrcAlpha = srcAlpha;
DestAlpha = destAlpha;
EquationColor = equationColor;
EquationAlpha = equationAlpha;
}
public static void SetBlendStates(BlendState state)
{
// Set blending mode
BlendEquationMode blendMode = state.ColorBlendFunction.GetBlendEquationMode();
GL.BlendEquation(blendMode);
// Set blending function
BlendingFactorSrc bfs = state.ColorSourceBlend.GetBlendFactorSrc();
BlendingFactorDest bfd = state.ColorDestinationBlend.GetBlendFactorDest();
GL.BlendFunc(bfs, bfd);
GL.Enable(EnableCap.Blend);
}
/// <summary>
/// Determine whether a blending function is supported.
/// </summary>
/// <param name="equation"></param>
/// <returns></returns>
private static bool IsSupportedEquation(BlendEquationMode equation)
{
switch (equation)
{
case BlendEquationMode.Min:
case BlendEquationMode.Max:
return(Gl.CurrentExtensions.BlendMinmax_EXT); // XXX Use GraphicsContext
case BlendEquationMode.FuncSubtract:
case BlendEquationMode.FuncReverseSubtract:
return(Gl.CurrentExtensions.BlendSubtract_EXT); // XXX Use GraphicsContext
default:
return(true);
}
}
public CacheBlendState(
bool enabled,
BlendingFactorSrc colorSource,
BlendEquationMode colorEquation,
BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource,
BlendEquationMode alphaEquation,
BlendingFactorDest alphaDest)
{
this.Enabled = enabled;
this.colorSource = colorSource;
this.colorEquation = colorEquation;
this.colorDest = colorDest;
this.alphaSource = alphaSource;
this.alphaEquation = alphaEquation;
this.alphaDest = alphaDest;
}
/// <summary>
/// Merge this state with another one.
/// </summary>
/// <param name="state">
/// A <see cref="IGraphicsState"/> having the same <see cref="StateIdentifier"/> of this state.
/// </param>
public override void Merge(IGraphicsState state)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
BlendState otherState = state as BlendState;
if (otherState == null)
{
throw new ArgumentException("not a BlendState", "state");
}
_Enabled = otherState._Enabled;
_RgbEquation = otherState._RgbEquation;
_AlphaEquation = otherState._AlphaEquation;
_RgbSrcFactor = otherState._RgbSrcFactor;
_AlphaSrcFactor = otherState._AlphaSrcFactor;
_RgbDstFactor = otherState._RgbDstFactor;
_AlphaDstFactor = otherState._AlphaDstFactor;
_BlendColor = otherState._BlendColor;
}
public static void BlendEquation(BlendEquationMode mode)
{
ES20.GL.BlendEquation(mode);
CheckError();
}
public BlendingEquationState(BlendEquationMode colorMode, BlendEquationMode alphaMode)
{
this.colorMode = colorMode;
this.alphaMode = alphaMode;
}
public BlendingEquationState(BlendEquationMode mode)
{
colorMode = alphaMode = mode;
}
internal static BlendOperation BlendOperationFromOgl(BlendEquationMode bom)
{
switch (bom)
{
case BlendEquationMode.FuncAdd:
return BlendOperation.Add;
case BlendEquationMode.Min:
return BlendOperation.Minimum;
case BlendEquationMode.Max:
return BlendOperation.Maximum;
case BlendEquationMode.FuncSubtract:
return BlendOperation.Subtract;
case BlendEquationMode.FuncReverseSubtract:
return BlendOperation.ReverseSubtract;
default:
throw new ArgumentOutOfRangeException("bom");
}
}
/// <summary>
/// Sets the equation used for both the RGB blend equation and the Alpha blend equation
/// </summary>
/// <param name="buf">specifies the index of the draw buffer for which to set the blend equation.</param>
/// <param name="mode">specifies how source and destination colors are combined. It must be GL_FUNC_ADD, GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT, GL_MIN, GL_MAX.</param>
/// <remarks>
/// The blend equations determine how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the ''destination'' color). This function sets both the RGB blend equation and the alpha blend equation to a single equation. glBlendEquationi specifies the blend equation for a single draw buffer whereas glBlendEquation sets the blend equation for all draw buffers.
/// </remarks>
public static void BlendEquationi(uint buf, BlendEquationMode mode)
{
Delegates.glBlendEquationi(buf, mode);
}
public IBlendState CreateBlendState(BlendingFactorSrc colorSource, BlendEquationMode colorEquation, BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource, BlendEquationMode alphaEquation, BlendingFactorDest alphaDest)
{
return(null);
}
public IBlendState CreateBlendState(BlendingFactorSrc colorSource, BlendEquationMode colorEquation, BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource, BlendEquationMode alphaEquation, BlendingFactorDest alphaDest)
{
return null;
}
public static void BlendEquation(BlendEquationMode mode)
{
Delegates.glBlendEquation(mode);
}
/// <summary>
/// Construct a BlendState with separated RGB/Alpha functions.
/// </summary>
/// <param name="rgbEquation">
/// A <see cref="BlendEquationMode"/> flag indicating which equation to used for blending RGB color components.
/// </param>
/// <param name="alphaEquation">
/// A <see cref="BlendEquationMode"/> flag indicating which equation to used for blending Alpha color component.
/// </param>
/// <param name="srcRgbFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to the source color (alpha component excluded).
/// </param>
/// <param name="srcAlphaFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to only the source alpha component.
/// </param>
/// <param name="dstRgbFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to the destination color (alpha component excluded).
/// </param>
/// <param name="dstAlphaFactor">
/// A <see cref="BlendingFactor"/> that specify the scaling factors applied to only the destination alpha component.
/// </param>
public BlendState(BlendEquationMode rgbEquation, BlendEquationMode alphaEquation, BlendingFactor srcRgbFactor, BlendingFactor srcAlphaFactor, BlendingFactor dstRgbFactor, BlendingFactor dstAlphaFactor) :
this(rgbEquation, alphaEquation, srcRgbFactor, srcAlphaFactor, dstRgbFactor, dstAlphaFactor, new ColorRGBAF())
{
}
/// <summary>
/// set the RGBA blend equation.
/// </summary>
/// <param name="rgbMode">set the RGB blend equation.</param>
/// <param name="alphaMode">set the Alpha blend equation.</param>
/// <param name="enableCapacity"></param>
public BlendEquationSeprateSwitch(BlendEquationMode rgbMode, BlendEquationMode alphaMode, bool enableCapacity = true)
: base(GL.GL_BLEND, enableCapacity)
{
this.RGBMode = rgbMode;
this.AlphaMode = alphaMode;
}
public MyBlendState(bool enabled, BlendingFactorSrc colorSource, BlendEquationMode colorEquation, BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource, BlendEquationMode alphaEquation, BlendingFactorDest alphaDest)
{
this.enabled = enabled;
this.colorSource = (global::OpenTK.Graphics.OpenGL.BlendingFactorSrc)colorSource;
this.colorEquation = (global::OpenTK.Graphics.OpenGL.BlendEquationMode)colorEquation;
this.colorDest = (global::OpenTK.Graphics.OpenGL.BlendingFactorDest)colorDest;
this.alphaSource = (global::OpenTK.Graphics.OpenGL.BlendingFactorSrc)alphaSource;
this.alphaEquation = (global::OpenTK.Graphics.OpenGL.BlendEquationMode)alphaEquation;
this.alphaDest = (global::OpenTK.Graphics.OpenGL.BlendingFactorDest)alphaDest;
}
public void Reset()
{
EquationMode = BlendEquationMode.FuncAdd;
SourceFactor = BlendingFactorSrc.One;
DestinationFactor = BlendingFactorDest.One;
}
public static void BlendEquation (BlendEquationMode blend)
{
blendEquation = blend;
}
/// <summary>
/// set the RGBA blend equation.
/// </summary>
/// <param name="mode">set the RGBA blend equation.</param>
/// <param name="enableCapacity"></param>
public BlendEquationSwitch(BlendEquationMode mode, bool enableCapacity = true)
: base(GL.GL_BLEND, enableCapacity)
{
this.Mode = mode;
}
public static void BlendEquationSeparate(BlendEquationMode modeRGB, BlendEquationMode modeAlpha)
{
glBlendEquationSeparate deleg = BaseGraphicsContext.Current.Loader.Get<glBlendEquationSeparate>();
if (deleg != null)
deleg(modeRGB, modeAlpha);
}
public IBlendState CreateBlendState(BlendingFactorSrc colorSource, BlendEquationMode colorEquation, BlendingFactorDest colorDest,
BlendingFactorSrc alphaSource, BlendEquationMode alphaEquation, BlendingFactorDest alphaDest)
{
return new CacheBlendState(true, colorSource, colorEquation, colorDest, alphaSource, alphaEquation, alphaDest);
}
public static void BlendEquation(BlendEquationMode mode)
{
Delegates.glBlendEquation(mode);
}
public static void BlendEquation(BlendEquationMode mode)
{
glBlendEquation deleg = BaseGraphicsContext.Current.Loader.Get<glBlendEquation>();
if (deleg != null)
deleg(mode);
}
