SaveWicSvgBitmap.cpp

#define _AFXDLL
#include <WinSock2.h> // MFC...
#include <windows.h>
#include <afxwin.h> // CBitmap
#include <atlbase.h>
#include <atlcom.h> // CComPtr
#include <d2d1.h>
#include <d2d1_3.h> // ID2D1DeviceContext5
#include <wincodec.h> // Wic

#pragma comment(lib, "d2d1")

void WicSave(HBITMAP bitmap)
{
	// create a Wic bitmap
	CComPtr<IWICImagingFactory> wicFactory;
	auto hr = wicFactory.CoCreateInstance(CLSID_WICImagingFactory);

	CComPtr<IWICBitmap> wicBitmap;
	hr = wicFactory->CreateBitmapFromHBITMAP(bitmap, nullptr, WICBitmapUseAlpha, &wicBitmap);

	// create PNG file
	CComPtr<IWICStream> wicStream;
	hr = wicFactory->CreateStream(&wicStream);
	hr = wicStream->InitializeFromFilename(L"drawing2.png", GENERIC_WRITE);

	// create PNG encoder
	CComPtr<IWICBitmapEncoder> encoder;
	hr = wicFactory->CreateEncoder(GUID_ContainerFormatPng, nullptr, &encoder);
	hr = encoder->Initialize(wicStream, WICBitmapEncoderNoCache);

	// create frame
	CComPtr<IWICBitmapFrameEncode> frame;
	hr = encoder->CreateNewFrame(&frame, nullptr);
	hr = frame->Initialize(nullptr);

	// write bitmap
	hr = frame->WriteSource(wicBitmap, nullptr);

	// commit
	hr = frame->Commit();
	hr = encoder->Commit();
}

void BuildSvgAsCBitmap(int width, int height)
{
	// initialize Direct2D
	D2D1_FACTORY_OPTIONS options = { D2D1_DEBUG_LEVEL_INFORMATION }; // remove this in release
	CComPtr<ID2D1Factory> factory;
	auto hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, IID_ID2D1Factory, &options, (void**)&factory);

	// create an in-memory bitmap
	BITMAPINFO bitmapInfo = {};
	bitmapInfo.bmiHeader.biSize = sizeof(bitmapInfo.bmiHeader);
	bitmapInfo.bmiHeader.biWidth = width;
	bitmapInfo.bmiHeader.biHeight = height;
	bitmapInfo.bmiHeader.biPlanes = 1;
	bitmapInfo.bmiHeader.biBitCount = 32;
	bitmapInfo.bmiHeader.biCompression = BI_RGB;

	CBitmap bitmap;
	void* bits = 0;
	auto res = bitmap.Attach(CreateDIBSection(nullptr, &bitmapInfo, DIB_RGB_COLORS, &bits, nullptr, 0));

	// create a DC render target
	CComPtr<ID2D1DCRenderTarget> target;
	D2D1_RENDER_TARGET_PROPERTIES props = {};
	props.pixelFormat.format = DXGI_FORMAT_B8G8R8A8_UNORM;
	props.pixelFormat.alphaMode = D2D1_ALPHA_MODE_PREMULTIPLIED;
	hr = factory->CreateDCRenderTarget(&props, &target);

	// create a DC, select bitmap and bind DC
	CDC cdc;
	cdc.CreateCompatibleDC(nullptr);
	auto old = cdc.SelectObject(bitmap);
	RECT rc = { 0, 0, width, height };
	hr = target->BindDC(cdc.GetSafeHdc(), &rc);

	// requires Windows 10 1703
	CComPtr<ID2D1DeviceContext5> dc;
	hr = target->QueryInterface(&dc);

	// open a stream in the .SVG file
	CComPtr<IStream> svgStream;
	hr = SHCreateStreamOnFileW(L"d:\\downloads\\drawing.svg", 0, &svgStream);

	// open the SVG as a document
	CComPtr<ID2D1SvgDocument> svg;
	D2D1_SIZE_F size = { (float)width, (float)height };
	hr = dc->CreateSvgDocument(svgStream, size, &svg);

	// draw it on the render target
	target->BeginDraw();
	dc->DrawSvgDocument(svg);
	hr = target->EndDraw();

	// TODO: do something with the bitmap
	WicSave(bitmap);

	// cleanup, etc.
	cdc.SelectObject(old);
}

void SaveSvgAsPng(UINT width, UINT height)
{
	// initialize Direct2D
	D2D1_FACTORY_OPTIONS options = { D2D1_DEBUG_LEVEL_INFORMATION }; // remove this in release
	CComPtr<ID2D1Factory> factory;
	auto hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, IID_ID2D1Factory, &options, (void**)&factory);

	// create a Wic bitmap
	CComPtr<IWICImagingFactory> wicFactory;
	hr = wicFactory.CoCreateInstance(CLSID_WICImagingFactory);

	CComPtr<IWICBitmap> bitmap;
	hr = wicFactory->CreateBitmap(width, height, GUID_WICPixelFormat32bppPBGRA, WICBitmapCacheOnLoad, &bitmap);

	// use the Wic bitmap as a Direct2D render target 
	CComPtr<ID2D1RenderTarget> target;
	D2D1_RENDER_TARGET_PROPERTIES props = {};
	hr = factory->CreateWicBitmapRenderTarget(bitmap, &props, &target);

	// requires Windows 10 1703
	CComPtr<ID2D1DeviceContext5> dc;
	hr = target->QueryInterface(&dc);

	// open a stream in the .SVG file
	CComPtr<IStream> svgStream;
	hr = SHCreateStreamOnFileW(L"d:\\downloads\\drawing.svg", 0, &svgStream);

	// open the SVG as a document
	CComPtr<ID2D1SvgDocument> svg;
	D2D1_SIZE_F size = { (float)width, (float)height };
	hr = dc->CreateSvgDocument(svgStream, size, &svg);

	// draw it on the render target
	target->BeginDraw();
	dc->DrawSvgDocument(svg);
	hr = target->EndDraw();

	// create PNG file
	CComPtr<IWICStream> wicStream;
	hr = wicFactory->CreateStream(&wicStream);
	hr = wicStream->InitializeFromFilename(L"drawing.png", GENERIC_WRITE);

	// create PNG encoder
	CComPtr<IWICBitmapEncoder> encoder;
	hr = wicFactory->CreateEncoder(GUID_ContainerFormatPng, nullptr, &encoder);
	hr = encoder->Initialize(wicStream, WICBitmapEncoderNoCache);

	// create frame
	CComPtr<IWICBitmapFrameEncode> frame;
	hr = encoder->CreateNewFrame(&frame, nullptr);
	hr = frame->Initialize(nullptr);

	// write bitmap
	hr = frame->WriteSource(bitmap, nullptr);

	// commit
	hr = frame->Commit();
	hr = encoder->Commit();
}

int main()
{
	CoInitialize(nullptr);
	SaveSvgAsPng(200, 200);
	BuildSvgAsCBitmap(200, 200);
	CoUninitialize();
	return 0;
}