public static void LoadFromBitmap(ref Bitmap bitmap, out uint texturehandle, out TextureTarget dimension, out RPixelFormat format, out PixelType type)
{
dimension = (TextureTarget)0;
texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
ErrorCode GLError = ErrorCode.NoError;
Bitmap CurrentBitmap = null;
try // Exceptions will be thrown if any Problem occurs while working on the file.
{
CurrentBitmap = bitmap;
if (TextureLoaderParameters.FlipImages)
{
CurrentBitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
if (CurrentBitmap.Height > 1)
{
dimension = TextureTarget.Texture2D;
}
else
{
dimension = TextureTarget.Texture1D;
}
GL.GenTextures(1, out texturehandle);
GL.BindTexture(dimension, texturehandle);
#region Load Texture
OpenTK.Graphics.OpenGL.PixelInternalFormat pif;
OpenTK.Graphics.OpenGL.PixelFormat pf;
OpenTK.Graphics.OpenGL.PixelType pt;
switch (CurrentBitmap.PixelFormat)
{
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed: // misses glColorTable setup
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.R8;
pf = OpenTK.Graphics.OpenGL.PixelFormat.Red;
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
break;
case System.Drawing.Imaging.PixelFormat.Format16bppArgb1555:
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555: // does not work
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgb5A1;
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgr;
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedShort5551Ext;
break;
/* case System.Drawing.Imaging.PixelFormat.Format16bppRgb565:
* pif = Reactor.Graphics.OpenGL.PixelInternalFormat.R5G6B5IccSgix;
* pf = Reactor.Graphics.OpenGL.PixelFormat.R5G6B5IccSgix;
* pt = Reactor.Graphics.OpenGL.PixelType.UnsignedByte;
* break;
*/
case System.Drawing.Imaging.PixelFormat.Format24bppRgb: // works
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgb;
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgr;
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
break;
case System.Drawing.Imaging.PixelFormat.Format32bppRgb: // has alpha too? wtf?
case System.Drawing.Imaging.PixelFormat.Canonical:
case System.Drawing.Imaging.PixelFormat.Format32bppArgb: // works
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgba;
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgra;
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
break;
default:
throw new ArgumentException("ERROR: Unsupported Pixel Format " + CurrentBitmap.PixelFormat);
}
format = (RPixelFormat)pf;
type = pt;
BitmapData Data = CurrentBitmap.LockBits(new System.Drawing.Rectangle(0, 0, CurrentBitmap.Width, CurrentBitmap.Height), ImageLockMode.ReadOnly, CurrentBitmap.PixelFormat);
if (Data.Height > 1)
{ // image is 2D
if (TextureLoaderParameters.BuildMipmapsForUncompressed)
{
throw new Exception("Cannot build mipmaps, Glu is deprecated.");
// Glu.Build2DMipmap(dimension, (int)pif, Data.Width, Data.Height, pf, pt, Data.Scan0);
}
else
{
GL.TexImage2D(dimension, 0, pif, Data.Width, Data.Height, TextureLoaderParameters.Border, pf, pt, Data.Scan0);
}
}
else
{ // image is 1D
if (TextureLoaderParameters.BuildMipmapsForUncompressed)
{
throw new Exception("Cannot build mipmaps, Glu is deprecated.");
// Glu.Build1DMipmap(dimension, (int)pif, Data.Width, pf, pt, Data.Scan0);
}
else
{
GL.TexImage1D(dimension, 0, pif, Data.Width, TextureLoaderParameters.Border, pf, pt, Data.Scan0);
}
}
//GL.Finish( );
REngine.CheckGLError();
GLError = GL.GetError( );
if (GLError != ErrorCode.NoError)
{
throw new ArgumentException("Error building TexImage. GL Error: " + GLError);
}
CurrentBitmap.UnlockBits(Data);
#endregion Load Texture
Setup(dimension);
return; // success
} catch (Exception e)
{
dimension = (TextureTarget)0;
texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
throw new ArgumentException("Texture Loading Error: Failed to read data.\n" + e);
// return; // failure
} finally
{
CurrentBitmap = null;
}
}
