parkan-playground/NResUI/Rendering/Viewport/OpenGL/ViewportTextureLoader.cs

using Silk.NET.OpenGL;

namespace NResUI.Rendering.Viewport.OpenGL;

public static unsafe class ViewportTextureLoader
{
    public static uint CreateRgbaTexture(GL gl, byte[] rgba, int width, int height)
    {
        var texture = gl.GenTexture();
        gl.BindTexture(TextureTarget.Texture2D, texture);

        fixed (byte* data = rgba)
        {
            gl.TexImage2D(
                TextureTarget.Texture2D,
                0,
                InternalFormat.Rgba8,
                (uint)width,
                (uint)height,
                0,
                PixelFormat.Rgba,
                PixelType.UnsignedByte,
                data);
        }

        gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
        gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
        gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat);
        gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat);
        gl.GenerateMipmap(TextureTarget.Texture2D);

        gl.BindTexture(TextureTarget.Texture2D, 0);
        return texture;
    }
}