// Copyright (c) .NET Foundation and Contributors (https://dotnetfoundation.org/ & https://stride3d.net) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
// Distributed under the MIT license. See the LICENSE.md file in the project root for more information.
/// <summary>
/// Samples a texture with a custom sampler and fix texture coordinates offset and scale.
/// </summary>
/// <remarks>
/// TTexture: generic Texture2D - the texture to sample.
/// TStream: generic Semantic - the texcoord index semantic used to sample the texture.
/// TScale: generic float2 - the scaling factor of the texture coordinates.
/// TOffset: generic float2 - the texture coordinates offset.
/// TSampler: generic SamplerState - the custom sampler.
/// </remarks>
shader ComputeColorTextureScaledOffsetSampler<LinkType TTextureName, 
                                             Semantic TStream, 
                                             LinkType TSampler, 
                                             MemberName TRgba, 
                                             float2 TScale, 
                                             float2 TOffset> : ComputeColor, 
                                                               DynamicTexture<TTextureName, PerMaterial>, 
                                                               DynamicSampler<TSampler, PerMaterial>, 
                                                               DynamicTextureStream<TStream>
{
    override float4 Compute() {
        return Texture.Sample(Sampler, streams.TexCoord * TScale + TOffset).TRgba;
    }
};
