/// <summary>
/// Initializes a new OpenGLTexture class.
/// </summary>
/// <param name="bitmap">The Bitmap.</param>
internal OpenGLTexture(Bitmap bitmap)
{
Height = bitmap.Height;
Width = bitmap.Width;
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
Id = OpenGLInterops.GenTexture();
OpenGLInterops.BindTexture(OpenGLInterops.GL_TEXTURE_2D, Id);
OpenGLInterops.TexParameterI(OpenGLInterops.GL_TEXTURE_2D, OpenGLInterops.GL_TEXTURE_WRAP_S,
(int)OpenGLInterops.GL_REPEAT);
OpenGLInterops.TexParameterI(OpenGLInterops.GL_TEXTURE_2D, OpenGLInterops.GL_TEXTURE_WRAP_T,
(int)OpenGLInterops.GL_REPEAT);
OpenGLInterops.TexParameterF(OpenGLInterops.GL_TEXTURE_2D, OpenGLInterops.GL_TEXTURE_MIN_FILTER,
SGL.SpriteBatch.InterpolationMode == InterpolationMode.Linear
? OpenGLInterops.GL_LINEAR
: OpenGLInterops.GL_NEAREST);
OpenGLInterops.TexParameterF(OpenGLInterops.GL_TEXTURE_2D, OpenGLInterops.GL_TEXTURE_MAG_FILTER,
SGL.SpriteBatch.InterpolationMode == InterpolationMode.Linear
? OpenGLInterops.GL_LINEAR
: OpenGLInterops.GL_NEAREST);
OpenGLInterops.TexImage2D(OpenGLInterops.GL_TEXTURE_2D, OpenGLInterops.GL_RGBA, Width, Height,
OpenGLInterops.GL_BGRA, OpenGLInterops.GL_UNSIGNED_BYTE, data.Scan0);
OpenGLInterops.BindTexture(OpenGLInterops.GL_TEXTURE_2D, 0);
bitmap.UnlockBits(data);
bitmap.Dispose();
}
/// <summary>
/// Unbinds the texture.
/// </summary>
internal void Unbind()
{
OpenGLInterops.BindTexture(OpenGLInterops.GL_TEXTURE_2D, 0);
}
/// <summary>
/// Binds the current texture.
/// </summary>
internal void Bind()
{
OpenGLInterops.ActiveTexture(OpenGLInterops.GL_TEXTURE0);
OpenGLInterops.BindTexture(OpenGLInterops.GL_TEXTURE_2D, Id);
}
