public static SamplerState New(GraphicsDevice graphicsDevice, SamplerStateDescription samplerStateDescription)
{
// Store SamplerState in a cache (D3D seems to have quite bad concurrency when using CreateSampler while rendering)
SamplerState samplerState;
lock (graphicsDevice.CachedSamplerStates)
{
if (graphicsDevice.CachedSamplerStates.TryGetValue(samplerStateDescription, out samplerState))
{
// TODO: Appropriate destroy
samplerState.AddReferenceInternal();
}
else
{
samplerState = new SamplerState(graphicsDevice, samplerStateDescription);
graphicsDevice.CachedSamplerStates.Add(samplerStateDescription, samplerState);
}
}
return(samplerState);
}
/// <summary>
/// Initializes a new instance of the <see cref="SamplerState"/> class.
/// </summary>
/// <param name="device">The device.</param>
/// <param name="name">The name.</param>
/// <param name="samplerStateDescription">The sampler state description.</param>
private SamplerState(GraphicsDevice device, SamplerStateDescription samplerStateDescription) : base(device)
{
Description = samplerStateDescription;
CreateNativeSampler();
}
private SamplerState(GraphicsDevice graphicsDevice, SamplerStateDescription samplerStateDescription)
{
throw new NotImplementedException();
}
private SamplerState(GraphicsDevice device, SamplerStateDescription samplerStateDescription) : base(device)
{
Description = samplerStateDescription;
textureWrapS = samplerStateDescription.AddressU.ToOpenGL();
textureWrapT = samplerStateDescription.AddressV.ToOpenGL();
textureWrapR = samplerStateDescription.AddressW.ToOpenGL();
compareMode = TextureCompareMode.None;
// ComparisonPoint can act as a mask for Comparison filters (0x80)
if ((samplerStateDescription.Filter & ComparisonMask) != 0)
{
compareMode = TextureCompareMode.CompareRefToTexture;
}
compareFunc = samplerStateDescription.CompareFunction.ToOpenGLDepthFunction();
borderColor = samplerStateDescription.BorderColor.ToArray();
// TODO: How to do MipLinear vs MipPoint?
switch (samplerStateDescription.Filter & ~(ComparisonMask | AnisotropicMask)) // Ignore comparison (128) and anisotropic (64) part
{
case TextureFilter.MinMagLinearMipPoint:
minFilter = TextureMinFilter.LinearMipmapNearest;
magFilter = TextureMagFilter.Linear;
break;
case TextureFilter.Linear:
minFilter = TextureMinFilter.LinearMipmapLinear;
magFilter = TextureMagFilter.Linear;
break;
case TextureFilter.MinPointMagMipLinear:
minFilter = TextureMinFilter.NearestMipmapLinear;
magFilter = TextureMagFilter.Linear;
break;
case TextureFilter.Point:
minFilter = TextureMinFilter.NearestMipmapNearest;
magFilter = TextureMagFilter.Nearest;
break;
case TextureFilter.MinPointMagLinearMipPoint:
minFilter = TextureMinFilter.NearestMipmapNearest;
magFilter = TextureMagFilter.Linear;
break;
case TextureFilter.MinLinearMagMipPoint:
minFilter = TextureMinFilter.LinearMipmapNearest;
magFilter = TextureMagFilter.Nearest;
break;
case TextureFilter.MinMagPointMipLinear:
minFilter = TextureMinFilter.NearestMipmapLinear;
magFilter = TextureMagFilter.Nearest;
break;
case TextureFilter.MinLinearMagPointMipLinear:
minFilter = TextureMinFilter.LinearMipmapLinear;
magFilter = TextureMagFilter.Nearest;
break;
default:
throw new NotImplementedException();
}
maxAnisotropy = ((samplerStateDescription.Filter & AnisotropicMask) != 0) ? Description.MaxAnisotropy : 1;
#if STRIDE_GRAPHICS_API_OPENGLES
// On OpenGL ES, we need to choose the appropriate min filter ourself if the texture doesn't contain mipmaps (done at PreDraw)
minFilterNoMipmap = minFilter;
if (minFilterNoMipmap == TextureMinFilter.LinearMipmapLinear)
{
minFilterNoMipmap = TextureMinFilter.Linear;
}
else if (minFilterNoMipmap == TextureMinFilter.NearestMipmapLinear)
{
minFilterNoMipmap = TextureMinFilter.Nearest;
}
#endif
}
/// <summary>
/// Create a new fake sampler state for serialization.
/// </summary>
/// <param name="description">The description of the sampler state</param>
/// <returns>The fake sampler state</returns>
public static SamplerState NewFake(SamplerStateDescription description)
{
return(new SamplerState(description));
}
// For FakeSamplerState.
private SamplerState(SamplerStateDescription description)
{
Description = description;
}