private static int getImageSize(RenderableTex t)
{
switch (t.pixelInternalFormat)
{
case PixelInternalFormat.CompressedRgbaS3tcDxt1Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt1Ext:
case PixelInternalFormat.CompressedRedRgtc1:
case PixelInternalFormat.CompressedSignedRedRgtc1:
return(t.width * t.height / 2);
case PixelInternalFormat.CompressedRgbaS3tcDxt3Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt3Ext:
case PixelInternalFormat.CompressedRgbaS3tcDxt5Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt5Ext:
case PixelInternalFormat.CompressedSignedRgRgtc2:
case PixelInternalFormat.CompressedRgRgtc2:
case PixelInternalFormat.CompressedRgbaBptcUnorm:
case PixelInternalFormat.CompressedSrgbAlphaBptcUnorm:
return(t.width * t.height);
case PixelInternalFormat.Rgba:
return(t.data.Length);
default:
return(t.data.Length);
}
}
public static int loadImage(RenderableTex t)
{
if (!t.GLInitialized)
{
return(-1);
}
int texID = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texID);
if (t.pixelInternalFormat != PixelInternalFormat.Rgba)
{
GL.CompressedTexImage2D <byte>(TextureTarget.Texture2D, 0, (InternalFormat)t.pixelInternalFormat,
t.width, t.height, 0, getImageSize(t), t.data);
//Debug.WriteLine(GL.GetError());
}
else
{
GL.TexImage2D <byte>(TextureTarget.Texture2D, 0, t.pixelInternalFormat, t.width, t.height, 0,
t.pixelFormat, PixelType.UnsignedByte, t.data);
}
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
return(texID);
}
public static unsafe Bitmap GLTextureToBitmap(RenderableTex t)
{
Bitmap bitmap = new Bitmap(t.width, t.height);
System.Drawing.Imaging.BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, t.width, t.height), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.BindTexture(TextureTarget.Texture2D, t.TexID);
GL.GetTexImage(TextureTarget.Texture2D, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bitmapData.Scan0);
bitmap.UnlockBits(bitmapData);
return(bitmap);
}
