public void WritePixelBufferBitmap()
{
using (Bitmap bitmap = new Bitmap(1, 1))
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream,
BitmapAlgorithms.SizeOfPixelsInBytes(bitmap)))
{
Color color = Color.FromArgb(0, 1, 2, 3);
bitmap.SetPixel(0, 0, color);
pixelBuffer.CopyFromBitmap(bitmap);
//
// Verify read back - comes back BGRA
//
BlittableBGRA[] readBackPixel = pixelBuffer.CopyToSystemMemory <BlittableBGRA>();
Assert.AreEqual(color.R, readBackPixel[0].R);
Assert.AreEqual(color.G, readBackPixel[0].G);
Assert.AreEqual(color.B, readBackPixel[0].B);
Assert.AreEqual(color.A, readBackPixel[0].A);
//
// Verify read back into bitmap
//
using (Bitmap readBackBitmap = pixelBuffer.CopyToBitmap(1, 1, PixelFormat.Format32bppArgb))
{
Assert.AreEqual(color, readBackBitmap.GetPixel(0, 0));
}
}
}
public void WritePixelBuffer()
{
BlittableRGBA[] pixels = new BlittableRGBA[]
{
new BlittableRGBA(Color.Red),
new BlittableRGBA(Color.Green),
new BlittableRGBA(Color.Blue),
new BlittableRGBA(Color.White)
};
int sizeInBytes = ArraySizeInBytes.Size(pixels);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
{
//
// Verify creating pixel buffer
//
Assert.IsNotNull(pixelBuffer);
Assert.AreEqual(PixelBufferHint.Stream, pixelBuffer.UsageHint);
Assert.AreEqual(sizeInBytes, pixelBuffer.SizeInBytes);
//
// Verify copying entire buffer between system memory and pixel buffer
//
pixelBuffer.CopyFromSystemMemory(pixels);
BlittableRGBA[] pixels2 = pixelBuffer.CopyToSystemMemory <BlittableRGBA>(0, pixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], pixels2[0]);
Assert.AreEqual(pixels[1], pixels2[1]);
Assert.AreEqual(pixels[2], pixels2[2]);
//
// Verify modiying a subset of the vertex buffer
//
BlittableRGBA modifiedPixel = new BlittableRGBA(Color.Black);
pixelBuffer.CopyFromSystemMemory(new[] { modifiedPixel }, SizeInBytes <BlittableRGBA> .Value);
BlittableRGBA[] pixels3 = pixelBuffer.CopyToSystemMemory <BlittableRGBA>(0, pixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], pixels3[0]);
Assert.AreEqual(modifiedPixel, pixels3[1]);
Assert.AreEqual(pixels[2], pixels3[2]);
}
}