totte/Texture.cs

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C#
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2023-08-06 03:12:18 +00:00
using OpenTK.Graphics.OpenGL4;
using OpenTK.Mathematics;
using System.Runtime.CompilerServices;
namespace SemiColinGames;
public class Texture : IDisposable {
public int Handle;
public Vector2i Size;
private static int maxHandle = -1;
private bool disposedValue = false;
public Texture(Image<Rgba32> image) {
Size = new Vector2i(image.Width, image.Height);
byte[] pixelBytes = new byte[Size.X * Size.Y * Unsafe.SizeOf<Rgba32>()];
image.CopyPixelDataTo(pixelBytes);
Handle = GL.GenTexture();
if (Handle > maxHandle) {
// Console.WriteLine("GL.GenTexture #" + Handle);
maxHandle = Handle;
}
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, Handle);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, Size.X, Size.Y, 0, PixelFormat.Rgba, PixelType.UnsignedByte, pixelBytes);
//GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.LinearMipmapLinear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int) TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) TextureWrapMode.ClampToBorder);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) TextureWrapMode.ClampToBorder);
float[] borderColor = { 0.0f, 0.0f, 0.0f, 1.0f };
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBorderColor, borderColor);
// FIXME: should we use mipmaps?
//GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
}
protected virtual void Dispose(bool disposing) {
if (!disposedValue) {
GL.DeleteTexture(Handle);
disposedValue = true;
}
}
~Texture() {
if (!disposedValue) {
Console.WriteLine("~Texture(): resource leak? Dispose() should be called manually.");
}
}
public void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
}