/// <summary>
/// Gets the handle that can be used for resource sharing.
/// </summary>
/// <param name="texture">The texture to be shared.</param>
private IntPtr GetSharedHandle(D3D11.ID3D11Texture2D texture)
{
texture.EnsureNotNull(nameof(texture));
using (var resource = texture.QueryInterface <IDXGIResource>())
{
return(resource.SharedHandle);
}
}
/// <summary>
/// Loads a bitmap from the given texture. Be careful: The texture must have CPU read access and this only matches for staging textures.
/// </summary>
/// <param name="device">The device on which the texture is created.</param>
/// <param name="stagingTexture">The texture to be loaded into the bitmap.</param>
/// <param name="targetBitmap">The target bitmap to write all contents to.</param>
/// <param name="pixelWidth">With of the bitmap in pixels.</param>
/// <param name="pixelHeight">Height of the bitmap in pixels.</param>
/// <param name="lockTimeout">Timeout for locking the target bitmap.</param>
internal static void LoadBitmapFromStagingTexture(EngineDevice device, D3D11.ID3D11Texture2D stagingTexture, WriteableBitmap targetBitmap, int pixelWidth, int pixelHeight, TimeSpan lockTimeout)
{
device.EnsureNotNull(nameof(device));
stagingTexture.EnsureNotNull(nameof(stagingTexture));
targetBitmap.EnsureNotNull(nameof(targetBitmap));
var textureDesc = stagingTexture.Description;
pixelWidth.EnsureEqualComparable(textureDesc.Width, $"{nameof(textureDesc)}.{nameof(textureDesc.Width)}");
pixelHeight.EnsureEqualComparable(textureDesc.Height, $"{nameof(textureDesc)}.{nameof(textureDesc.Height)}");
// Prepare target bitmap
var dataBox = device.Internals.DeviceImmediateContextD3D11.Map(stagingTexture, 0, D3D11.MapMode.Read, D3D11.MapFlags.None);
try
{
if (!targetBitmap.TryLock(new Duration(lockTimeout)))
{
return;
}
try
{
// Copy data row by row
// => Rows from data source may have more pixels because driver changes the size of textures
var rowPitch = (uint)(pixelWidth * 4);
for (var loopRow = 0; loopRow < pixelHeight; loopRow++)
{
var rowPitchSource = dataBox.RowPitch;
var rowPitchDestination = pixelWidth * 4;
SeeingSharpUtil.CopyMemory(
dataBox.DataPointer + loopRow * rowPitchSource,
targetBitmap.BackBuffer + loopRow * rowPitchDestination,
rowPitch);
}
}
finally
{
targetBitmap.AddDirtyRect(new Int32Rect(0, 0, pixelWidth, pixelHeight));
targetBitmap.Unlock();
}
}
finally
{
device.Internals.DeviceImmediateContextD3D11.Unmap(stagingTexture, 0);
}
}
/// <summary>
/// Loads a bitmap from the given texture. Be careful: The texture must have CPU read access and this only matches for staging textures.
/// </summary>
/// <param name="device">The device on which the texture is created.</param>
/// <param name="stagingTexture">The texture to be loaded into the bitmap.</param>
/// <param name="width">The width of the texture.</param>
/// <param name="height">The height of the texture.</param>
internal static GDI.Bitmap LoadBitmapFromStagingTexture(EngineDevice device, D3D11.ID3D11Texture2D stagingTexture, int width, int height)
{
device.EnsureNotNull(nameof(device));
stagingTexture.EnsureNotNull(nameof(stagingTexture));
width.EnsurePositiveOrZero(nameof(width));
height.EnsurePositiveOrZero(nameof(height));
//Prepare target bitmap
var resultBitmap = new GDI.Bitmap(width, height);
var dataBox = device.Internals.DeviceImmediateContextD3D11.Map(stagingTexture, 0, D3D11.MapMode.Read, D3D11.MapFlags.None);
try
{
//Lock bitmap so it can be accessed for texture loading
var bitmapData = resultBitmap.LockBits(
new GDI.Rectangle(0, 0, resultBitmap.Width, resultBitmap.Height),
ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
try
{
//Copy data row by row
// => Rows form data source may have more pixels because driver changes the size of textures
var rowPitch = (uint)(width * 4);
for (var loopRow = 0; loopRow < height; loopRow++)
{
// Copy bitmap data
var rowPitchSource = dataBox.RowPitch;
var rowPitchDestination = width * 4;
SeeingSharpUtil.CopyMemory(
dataBox.DataPointer + loopRow * rowPitchSource,
bitmapData.Scan0 + loopRow * rowPitchDestination,
rowPitch);
}
}
finally
{
resultBitmap.UnlockBits(bitmapData);
}
}
finally
{
device.Internals.DeviceImmediateContextD3D11.Unmap(stagingTexture, 0);
}
return(resultBitmap);
}
