public Texture(string name, Bitmap image, bool generateMipmaps, bool srgb)
{
Name = name;
Width = image.Width;
Height = image.Height;
InternalFormat = srgb ? Srgb8Alpha8 : SizedInternalFormat.Rgba8;
if (generateMipmaps)
{
MipmapLevels = (int)Math.Floor(Math.Log(Math.Max(Width, Height), 2));
}
else
{
MipmapLevels = 1;
}
OpenGlUtils.CheckGLError("Clear");
OpenGlUtils.CreateTexture(TextureTarget.Texture2D, Name, out GLTexture);
GL.TextureStorage2D(GLTexture, MipmapLevels, InternalFormat, Width, Height);
OpenGlUtils.CheckGLError("Storage2d");
BitmapData data = image.LockBits(new Rectangle(0, 0, Width, Height),
ImageLockMode.ReadOnly, global::System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TextureSubImage2D(GLTexture, 0, 0, 0, Width, Height, PixelFormat.Bgra, PixelType.UnsignedByte, data.Scan0);
OpenGlUtils.CheckGLError("SubImage");
image.UnlockBits(data);
if (generateMipmaps)
{
GL.GenerateTextureMipmap(GLTexture);
}
GL.TextureParameter(GLTexture, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat);
OpenGlUtils.CheckGLError("WrapS");
GL.TextureParameter(GLTexture, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat);
OpenGlUtils.CheckGLError("WrapT");
GL.TextureParameter(GLTexture, TextureParameterName.TextureMinFilter, (int)(generateMipmaps ? TextureMinFilter.Linear : TextureMinFilter.LinearMipmapLinear));
GL.TextureParameter(GLTexture, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
OpenGlUtils.CheckGLError("Filtering");
GL.TextureParameter(GLTexture, TextureParameterName.TextureMaxLevel, MipmapLevels - 1);
GL.TexParameter(TextureTarget.Texture2D, (TextureParameterName)OpenTK.Graphics.ES11.ExtTextureFilterAnisotropic.TextureMaxAnisotropyExt, MaxAniso);
OpenGlUtils.CheckGLError("Anisotropic");
image.Dispose();
}
public Texture(string name, int width, int height, IntPtr data, bool generateMipmaps = false, bool srgb = false)
{
Name = name;
Width = width;
Height = height;
InternalFormat = srgb ? Srgb8Alpha8 : SizedInternalFormat.Rgba8;
MipmapLevels = generateMipmaps == false ? 1 : (int)Math.Floor(Math.Log(Math.Max(Width, Height), 2));
OpenGlUtils.CreateTexture(TextureTarget.Texture2D, Name, out GLTexture);
GL.TextureStorage2D(GLTexture, MipmapLevels, InternalFormat, Width, Height);
GL.TextureSubImage2D(GLTexture, 0, 0, 0, Width, Height, PixelFormat.Bgra, PixelType.UnsignedByte, data);
if (generateMipmaps)
{
GL.GenerateTextureMipmap(GLTexture);
}
SetWrap(TextureCoordinate.S, TextureWrapMode.Repeat);
SetWrap(TextureCoordinate.T, TextureWrapMode.Repeat);
GL.TextureParameter(GLTexture, TextureParameterName.TextureMaxLevel, MipmapLevels - 1);
}
public void SetAnisotropy(float level)
{
const TextureParameterName TEXTURE_MAX_ANISOTROPY = (TextureParameterName)0x84FE;
GL.TextureParameter(GLTexture, TEXTURE_MAX_ANISOTROPY, OpenGlUtils.Clamp(level, 1, MaxAniso));
}
