public void MipMapsHaveCorrectDimensionsForNonPowerOfTwoTexture(int mipLevel, int expectedWidth, int expectedHeight)
{
// Arrange.
var texture = new Texture2D(new Device(), new Texture2DDescription
{
Width = 5,
Height = 16,
ArraySize = 1
});
// Act / Assert.
int actualWidth, actualHeight;
texture.GetDimensions(mipLevel, out actualWidth, out actualHeight);
Assert.That(actualWidth, Is.EqualTo(expectedWidth));
Assert.That(actualHeight, Is.EqualTo(expectedHeight));
}
public void TextureHasCorrectNumberOfMipMapLevels(int width, int height, int expectedNumberOfLevels)
{
// Arrange.
var texture = new Texture2D(new Device(), new Texture2DDescription
{
Width = width,
Height = height,
ArraySize = 1
});
int actualWidth, actualHeight, numberOfLevels;
// Act.
texture.GetDimensions(0, out actualWidth, out actualHeight, out numberOfLevels);
// Assert.
Assert.That(actualWidth, Is.EqualTo(width));
Assert.That(actualHeight, Is.EqualTo(height));
Assert.That(numberOfLevels, Is.EqualTo(expectedNumberOfLevels));
}
public static WriteableBitmap CreateBitmapFromTexture(Texture2D texture, int arraySlice, int mipLevel)
{
var subresource = Resource.CalculateSubresource(mipLevel, arraySlice, texture.Description.MipLevels);
var colors = texture.GetData(subresource);
var pixelData = new byte[colors.Length * 4];
for (int i = 0; i < colors.Length; i++)
{
pixelData[(i * 4) + 0] = (byte) (colors[i].B * 255.0f);
pixelData[(i * 4) + 1] = (byte) (colors[i].G * 255.0f);
pixelData[(i * 4) + 2] = (byte) (colors[i].R * 255.0f);
pixelData[(i * 4) + 3] = (byte) (colors[i].A * 255.0f);
}
int width, height;
texture.GetDimensions(mipLevel, out width, out height);
var bitmapSouce = BitmapSource.Create(width, height, 96, 96, PixelFormats.Bgra32, null,
pixelData, width * PixelFormats.Bgra32.BitsPerPixel / 8);
return new WriteableBitmap(bitmapSouce);
}