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//Returns a Texture2D containing the same image as the bitmap parameter, resized if necessary. Returns null if an error occurs.
public Texture2D CreateTextureFromBitmap( GraphicsDevice graphics_device, System.Drawing.Bitmap bitmap )
{
Texture2D texture = null;
bool dispose_bitmap = false;
try
{
if (bitmap != null)
{
//Resize the bitmap if necessary, then capture its final size
if (graphics_device.GraphicsDeviceCapabilities.TextureCapabilities.RequiresPower2)
{
System.Drawing.Size new_size; //New size will be next largest power of two, so bitmap will always be scaled up, never down
new_size = new Size( (int)Math.Pow( 2.0, Math.Ceiling( Math.Log( (double)bitmap.Width ) / Math.Log( 2.0 ) ) ), (int)Math.Pow( 2.0, Math.Ceiling( Math.Log( (double)bitmap.Height ) / Math.Log( 2.0 ) ) ) );
bitmap = new Bitmap( bitmap, new_size );
dispose_bitmap = true;
}
System.Drawing.Size bitmap_size = bitmap.Size;
//Create a texture with an appropriate format
texture = new Texture2D( graphics_device, bitmap_size.Width, bitmap_size.Height, 1, TextureUsage.None, SurfaceFormat.Color );
//Lock the bitmap data and copy it out to a byte array
System.Drawing.Imaging.BitmapData bmpdata = bitmap.LockBits( new System.Drawing.Rectangle( 0, 0, bitmap_size.Width, bitmap_size.Height ), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb );
byte [ ] pixel_bytes = null;
try
{
pixel_bytes = new byte[bmpdata.Stride * bmpdata.Height];
Marshal.Copy( bmpdata.Scan0, pixel_bytes, 0, temp_bytes.Length );
}catch{} //If error occurs allocating memory, bitmap will still be unlocked properly
bitmap.UnlockBits( bmpdata );
//Set the texture's data to the byte array containing the bitmap data that was just copied
if (pixel_bytes != null) texture.SetData<byte>( pixel_bytes );
}
}
catch
{
//Error occured; existing texture must be considered invalid
if (texture != null)
{
texture.Dispose();
texture = null;
}
}
finally
{
if (dispose_bitmap)
bitmap.Dispose();
}
return texture;
} |
obtenir une texture2d à partir d'un objet Image ou Bitmap
Répondre avec citation
. Enfin presque il ne faudra pas oublier d'importer dans le projet qui fera la compilation également les références aux projets :
.
Envoyé par estacado
Mais cela n'explique pas l'erreur de mémoire partagée...
donc il est interprété comme rectangle de destination. Or vu ma classe en fait c'est le rectangle source... Bref il y a méli-mélo dans ma gestion des zones sources et destination.
)
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