/// <summary>
/// Creates an <see cref="ID2D1Bitmap"/> instance.
/// </summary>
/// <param name="d2D1DeviceContext">The input <see cref="ID2D1DeviceContext"/> instance to use to create the bitmap source.</param>
/// <param name="width">The width of the bitmap to create.</param>
/// <param name="height">The height of the bitmap to create.</param>
/// <returns>A new <see cref="ID2D1Bitmap"/> instance.</returns>
public static unsafe ComPtr <ID2D1Bitmap> CreateD2D1BitmapAndSetAsTarget(ID2D1DeviceContext *d2D1DeviceContext, uint width, uint height)
{
D2D_SIZE_U d2DSize;
d2DSize.width = width;
d2DSize.height = height;
D2D1_BITMAP_PROPERTIES1 d2DBitmapProperties1Target = default;
d2DBitmapProperties1Target.pixelFormat.format = DXGI_FORMAT.DXGI_FORMAT_B8G8R8A8_UNORM;
d2DBitmapProperties1Target.pixelFormat.alphaMode = D2D1_ALPHA_MODE.D2D1_ALPHA_MODE_PREMULTIPLIED;
d2DBitmapProperties1Target.bitmapOptions =
D2D1_BITMAP_OPTIONS.D2D1_BITMAP_OPTIONS_TARGET |
D2D1_BITMAP_OPTIONS.D2D1_BITMAP_OPTIONS_CANNOT_DRAW;
using ComPtr <ID2D1Bitmap> d2D1Bitmap1Target = default;
// Create a target D2D1 bitmap
d2D1DeviceContext->CreateBitmap(
size: d2DSize,
sourceData: null,
pitch: 0,
bitmapProperties: &d2DBitmapProperties1Target,
bitmap: (ID2D1Bitmap1 **)d2D1Bitmap1Target.GetAddressOf()).Assert();
d2D1DeviceContext->SetTarget((ID2D1Image *)d2D1Bitmap1Target.Get());
return(d2D1Bitmap1Target.Move());
}
/// <summary>
/// Creates an <see cref="ID2D1Bitmap1"/> instance and copies data from a source bitmap.
/// </summary>
/// <param name="d2D1DeviceContext">The input <see cref="ID2D1DeviceContext"/> instance to use to create the bitmap.</param>
/// <param name="d2D1Bitmap">The input <see cref="ID2D1Bitmap1"/> to read data from.</param>
/// <param name="d2D1MappedRect">The resulting <see cref="D2D1_MAPPED_RECT"/> for the bitmap.</param>
/// <returns>A new <see cref="ID2D1Bitmap1"/> instance.</returns>
public static unsafe ComPtr <ID2D1Bitmap1> CreateD2D1Bitmap1Buffer(ID2D1DeviceContext *d2D1DeviceContext, ID2D1Bitmap *d2D1Bitmap, out D2D1_MAPPED_RECT d2D1MappedRect)
{
D2D_SIZE_U d2DSize = d2D1Bitmap->GetPixelSize();
D2D1_BITMAP_PROPERTIES1 d2DBitmapProperties1Buffer = default;
d2DBitmapProperties1Buffer.pixelFormat.format = DXGI_FORMAT.DXGI_FORMAT_B8G8R8A8_UNORM;
d2DBitmapProperties1Buffer.pixelFormat.alphaMode = D2D1_ALPHA_MODE.D2D1_ALPHA_MODE_PREMULTIPLIED;
d2DBitmapProperties1Buffer.bitmapOptions = D2D1_BITMAP_OPTIONS.D2D1_BITMAP_OPTIONS_CPU_READ | D2D1_BITMAP_OPTIONS.D2D1_BITMAP_OPTIONS_CANNOT_DRAW;
using ComPtr <ID2D1Bitmap1> d2D1Bitmap1Buffer = default;
// Create a buffer D2D1 bitmap
d2D1DeviceContext->CreateBitmap(
size: d2DSize,
sourceData: null,
pitch: 0,
bitmapProperties: &d2DBitmapProperties1Buffer,
bitmap: d2D1Bitmap1Buffer.GetAddressOf()).Assert();
D2D_POINT_2U d2DPointDestination = default;
D2D_RECT_U d2DRectSource = new(0, 0, d2DSize.width, d2DSize.height);
// Copy the image from the target to the readback bitmap
d2D1Bitmap1Buffer.Get()->CopyFromBitmap(
destPoint: &d2DPointDestination,
bitmap: d2D1Bitmap,
srcRect: &d2DRectSource);
fixed(D2D1_MAPPED_RECT *d2D1MappedRectPtr = &d2D1MappedRect)
{
// Map the buffer bitmap
d2D1Bitmap1Buffer.Get()->Map(
options: D2D1_MAP_OPTIONS.D2D1_MAP_OPTIONS_READ,
mappedRect: d2D1MappedRectPtr).Assert();
}
return(d2D1Bitmap1Buffer.Move());
}
public void Draw(IntPtr hWnd)
{
if (m_disposed)
{
return;
}
EnsureDevice(hWnd);
using (var backbuffer = new IDXGISurface2())
{
// setup backbuffer
m_swapchain.GetBuffer(0, ref IDXGISurface2.IID, out backbuffer.PtrForNew).ThrowIfFailed();
backbuffer.GetDesc(out DXGI_SURFACE_DESC desc);
var prop = new D2D1_BITMAP_PROPERTIES1
{
bitmapOptions = D2D1_BITMAP_OPTIONS._TARGET | D2D1_BITMAP_OPTIONS._CANNOT_DRAW,
pixelFormat = new D2D1_PIXEL_FORMAT
{
format = DXGI_FORMAT._B8G8R8A8_UNORM,
alphaMode = D2D1_ALPHA_MODE._IGNORE
}
};
m_d2dContext.CreateBitmapFromDxgiSurface(backbuffer, ref prop, out ID2D1Bitmap1 bitmap).ThrowIfFailed();
using (bitmap)
{
m_d2dContext.SetTarget(bitmap);
// draw
m_d2dContext.BeginDraw();
var color = new Vector4(0, 0.1f, 0, 0);
m_d2dContext.Clear(ref color);
var brushColor = new Vector4(1, 0, 0, 1);
var brushProp = new D2D1_BRUSH_PROPERTIES
{
opacity = 1.0f,
transform = new Matrix3x2
{
M11 = 1.0f,
M22 = 1.0f,
}
};
m_d2dContext.CreateSolidColorBrush(ref brushColor, ref brushProp, out ID2D1SolidColorBrush brush).ThrowIfFailed();
using (brush)
{
var ellipse = new D2D1_ELLIPSE
{
radiusX = 50.0f,
radiusY = 50.0f,
};
m_d2dContext.DrawEllipse(ref ellipse, brush, 10.0f, null);
}
}
// dwrite
var font = new WSTR("Consolas");
var text = new WSTR("A0漢字B");
var locale = new WSTR("ja-jp");
m_dwriteFactory.CreateTextFormat(
ref font.Data,
null,
DWRITE_FONT_WEIGHT._REGULAR,
DWRITE_FONT_STYLE._NORMAL,
DWRITE_FONT_STRETCH._NORMAL,
144.0f,
ref locale.Data,
out IDWriteTextFormat pTextFormat
).ThrowIfFailed();
using (pTextFormat)
{
pTextFormat.SetTextAlignment(DWRITE_TEXT_ALIGNMENT._CENTER).ThrowIfFailed();
pTextFormat.SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT._CENTER).ThrowIfFailed();
var brushColor = new Vector4(0.7f, 0.7f, 1, 1);
var brushProp = new D2D1_BRUSH_PROPERTIES
{
opacity = 1.0f,
transform = new Matrix3x2
{
M11 = 1.0f,
M22 = 1.0f,
}
};
m_d2dContext.CreateSolidColorBrush(ref brushColor, ref brushProp, out ID2D1SolidColorBrush brush).ThrowIfFailed();
using (brush)
{
var rect = new Vector4
{
X = 0,
Y = 0,
Z = m_width,
W = m_height,
};
m_d2dContext.DrawText(
ref text.Data,
(uint)text.Length, // The string's length.
pTextFormat, // The text format.
ref rect, // The region of the window where the text will be rendered.
brush, // The brush used to draw the text.
D2D1_DRAW_TEXT_OPTIONS._NONE,
DWRITE_MEASURING_MODE._NATURAL
);
}
}
m_d2dContext.EndDraw(out ulong tag1, out ulong tag2);
// }
m_context.Flush();
m_swapchain.Present(0, 0);
m_d2dContext.SetTarget(null);
}
}
