Use WIC to save the drawing drawn by direct2d as a file

The WIC (Windows imaging component) component introduced from Windows Vista processes bitmap in an object-oriented manner and is suitable for use with direct2d.

You can use WIC to save direct2d images as bitmap files.

BelowCodeDemonstrate how to save an image drawn by direct2d with a transparent background color to a PNG bitmap file:

 
Ccomptr <iwicimagingfactory> spwicimagingfactory;
 
 
IFR (direct2dhelper: createwicimagingfactory (& spwicimagingfactory ));
 
 
 
Ccomptr <iwicbitmap> spwicbitmap;
 
 
Ccomptr <id2d1rendertarget> spbitmaprt;
 
 
Crect RC;
 
 
Getclientrect (& rc );
 
 
IntWidth = RC. Width (), height = RC. Height ();
 
 
 
IFR (spwicimagingfactory-> createbitmap (
 
 
Width,
 
 
Height,
 
 
// Guid_wicpixelformat32bppbgr,
 
Guid_wicpixelformat32bpppbgra,
 
 
Wicbitmapcacheonload,
 
 
& Spwicbitmap ));
 
 
D2d1_pixel_format pixelformat = pixelformat (
 
 
Dxgi_format_b8g8r8a8_unorm,
 
D2d1_alpha_mode_premultiplied );
 
 
IFR (m_spd2dfactory-> createwicbitmaprendertarget (
 
 
Spwicbitmap,
 
 
Rendertargetproperties (),
 
// Rendertargetproperties (d2d1_render_target_type_default, pixelformat ),
 
 
& Spbitmaprt ));
 
 
 
 
Ccomptr <id2d1solidcolorbrush> spsolidbrush;
 
IFR (spbitmaprt-> createsolidcolorbrush (colgrading: pink), & spsolidbrush ));
 
 
 
 
// Drawing...
 
 
Spbitmaprt-> begindraw ();
 
 
Spbitmaprt-> clear (collf: white, 0 ));
 
D2d1_ellipse ellipse = ellipse (point2f (width/2, height/2), width/2-50, height/2-50 );
 
 
Spbitmaprt-> fillellipse (ellipse, spsolidbrush );
 
 
Spbitmaprt-> enddraw ();
 
 
 
 
Ccomptr <iwicstream> spstream;
 
IFR (spwicimagingfactory-> createstream (& spstream ));
 
 
Lpctstr filename = _ T ("Output.png");
 
 
IFR (spstream-> initializefromfilename (filename, generic_write ));
 
 
 
Ccomptr <iwicbitmapencoder> spbitmapencoder;
 
 
Ccomptr <iwicbitmapframeencode> spframeencode;
 
 
IFR (spwicimagingfactory-> createencoder (guid_containerformatpng, null, & spbitmapencoder ));
 
 
IFR (spbitmapencoder-> initialize (spstream, wicbitmapencodernocache ));
 
IFR (spbitmapencoder-> createnewframe (& spframeencode, null ));
 
 
IFR (spframeencode-> initialize (null ));
 
 
IFR (spframeencode-> setsize (width, height ));
 
 
Wicpixelformatguid format = guid_wicpixelformatdontcare;
 
IFR (spframeencode-> setpixelformat (& format ));
 
 
IFR (spframeencode-> writesource (spwicbitmap, null ));
 
 
IFR (spframeencode-> commit ());
 
 
IFR (spbitmapencoder-> commit ());