/// <summary>
/// Loads a texture from a file, binds it to the current GL context, specifies some GL parameters,
/// generates a mipmap, and adds the generated texture's id to the loadedTextures dictionary. Does not output the width and height of the image.
/// </summary>
private void InitTexture(string folderPath, string fileName, string fileType)
{
int width, height;
var data = LoadTexture(folderPath, fileName, fileType, out width, out height);
int texture = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texture);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Bgra, PixelType.Float, IntPtr.Zero);
GL.TextureSubImage2D(texture, 0, 0, 0, width, height, PixelFormat.Bgra, PixelType.Float, data);
GL.Enable(EnableCap.Texture2D);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear); // defines sampling behavior when scaling image down
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear); // defines sampling behavior when scaling image up
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.ClampToBorder); // defines border behavior in the x directions
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.ClampToBorder); // defines border behavior in the y directions
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
Texture tex = new Texture(texture, width, height, 1);
tex.AddSubTextureLocation(new SubTextureLocation(new Vector2(0f, 0f), new Vector2(1f, 1f)));
loadedTextures.Add(fileName, _loadedTextureCount);
_loadedTextures[_loadedTextureCount] = tex;
_loadedTextureCount++;
}
