Stretched Texture

Stretched Texture

• elsonidoq

  Sorry for butting in, but in my Feb2006 MDX I can't find the new operator for the Texture as described above. I have the same issue, I don't want to convert all my images to a square. Is this left out of the managed version Thanks.
  
  

• VijayG

  Here's a method I developed that is quite effective at turning a Bitmap into a texture (and gets around the square problem):

  protected D3D.Texture BitmapToTexture( D3D.Device graphics, ref Bitmap bmp )
  {
  MemoryStream loMS = new MemoryStream();

  // Create a square offscreen bitmap, the dimensions of which are
  // the size of the greatest dimension of the original bitmap
  Bitmap osBmp = new Bitmap( (int)Math.Max( bmp.Width, bmp.Height ), (int)Math.Max( bmp.Width, bmp.Height ) );
  // Draw the original bitmap into the top-left corner of the new bitmap
  Graphics osg = Graphics.FromImage( osBmp );
  osg.DrawImage( bmp, 0, 0, bmp.Width, bmp.Height );
  // Use the new square bitmap as the texture
  osBmp.Save( loMS, System.Drawing.Imaging.ImageFormat.Bmp );
  loMS.Seek( 0, 0 );
  return D3D.TextureLoader.FromStream( graphics, loMS );
  }

  You'll end up with a texture that has whitespace at the edges, so that it still forms a square, but your original bitmap will keep it's proportions. When drawing your sprite, just leave the whitespace out.

  
  
  

• Serega

  No but you can't use the easy API overloads since they assume square

  use

  myTexture = new Texture(e.Device, Utility.FindMediaFile("texture.dds"), XSIZE, YSIZE, 1, Usage.None, Format.A8B8G8R8, Pool.Managed, Filter.Point, Filter.None, 0, false, null);

  And all should be well.

  If your textures are square and a power of 2 you can use the simpler

  myTexture = new Texture(e.Device, Utility.FindMediaFile("texture.dds"));

  Remember that though Sprite will work with x,y coordinates under the covers textures u,v coordinates are always 0.0-1.0. Sprite is just doing the math for you.

  
  
  

• MShanahan

  If your hardware supports it you have to use the more complex Texture Loader call where you can specify the size too.
  
  

• just*Do*It

  Got it. Thanks!
  
  

• Peter Oresnik

  Make sure that the texture conforms to the power of 2 sizes. This means that the texture should be n ^ 2. Such as the following, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, ....
  You could also see if your hardware supports non-power of 2 texture by checking the device caps.
  
  I hope this helps.
  Take care.
  
  
  

• SpoBo

  I don't get it... does this mean that any graphic files I import in my program have to be changed so that they're square shape What if my background's 800x600 What if my character is taller than he is wide

  And if I do have to make all of my external bitmaps squares, then how am I supposed to know where to crop them Some might have a whole whack of blank space to make them a square, and others might have very little...

  
  
  

• thebobman

  I'm glad you told me that. Otherwise I never would have figured it out. I adjusted the texture size and it displays fine now. THANKS!!!
  
• Stretched Texture