gvplugin_gdiplus.h

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
#include <memory>
#include <vector>
 
#include <windows.h>
#include <gdiplus.h>
 
typedef enum {
        FORMAT_NONE,
        FORMAT_METAFILE,
        FORMAT_BMP,
        FORMAT_EMF,
        FORMAT_EMFPLUS,
        FORMAT_GIF,
        FORMAT_JPEG,
        FORMAT_PNG,
        FORMAT_TIFF
} format_type;
 
/* RAII for GetDC/ReleaseDC */
 
struct DeviceContext
{
        HWND hwnd;
        HDC hdc;
 
        DeviceContext(HWND wnd = nullptr): hwnd(wnd), hdc(GetDC(wnd))
        {
        }
 
        ~DeviceContext()
        {
                ReleaseDC(hwnd, hdc);
        }
 
};
 
/* textlayout etc. */
 
struct Layout
{
        std::unique_ptr<Gdiplus::Font> font;
        std::vector<WCHAR> text;
 
        Layout(char *fontname, double fontsize, char* string);
};
 
static const int BYTES_PER_PIXEL = 4;           /* bytes per pixel */
 
void gdiplus_free_layout(void *layout);
 
void UseGdiplus();
const Gdiplus::StringFormat* GetGenericTypographic();
void SaveBitmapToStream(Gdiplus::Bitmap &bitmap, IStream *stream, int format);