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/* $Id: gvplugin_gdiplus.cpp,v 1.9 2009/07/14 21:14:51 arif Exp $ $Revision: 1.9 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2008 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include "gvplugin.h"
#include "gvplugin_gdiplus.h"
extern gvplugin_installed_t gvrender_gdiplus_types[];
extern gvplugin_installed_t gvtextlayout_gdiplus_types[];
extern gvplugin_installed_t gvloadimage_gdiplus_types[];
extern gvplugin_installed_t gvdevice_gdiplus_types[];
extern gvplugin_installed_t gvdevice_gdiplus_types_for_cairo[];
using namespace std;
using namespace Gdiplus;
/* class id corresponding to each format_type */
static GUID format_id [] = {
GUID_NULL,
GUID_NULL,
ImageFormatBMP,
ImageFormatEMF,
ImageFormatEMF,
ImageFormatGIF,
ImageFormatJPEG,
ImageFormatPNG,
ImageFormatTIFF
};
static ULONG_PTR _gdiplusToken = NULL;
static void UnuseGdiplus()
{
GdiplusShutdown(_gdiplusToken);
}
void UseGdiplus()
{
/* only startup once, and ensure we get shutdown */
if (!_gdiplusToken)
{
GdiplusStartupInput input;
GdiplusStartup(&_gdiplusToken, &input, NULL);
atexit(&UnuseGdiplus);
}
}
const Gdiplus::StringFormat* GetGenericTypographic()
{
const Gdiplus::StringFormat* format = StringFormat::GenericTypographic();
return format;
}
void SaveBitmapToStream(Bitmap &bitmap, IStream *stream, int format)
{
/* search the encoders for one that matches our device id, then save the bitmap there */
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
UINT encoderNum;
UINT encoderSize;
GetImageEncodersSize(&encoderNum, &encoderSize);
vector<char> codec_buffer(encoderSize);
ImageCodecInfo *codecs = (ImageCodecInfo *)&codec_buffer.front();
GetImageEncoders(encoderNum, encoderSize, codecs);
for (UINT i = 0; i < encoderNum; ++i)
if (memcmp(&(format_id[format]), &codecs[i].FormatID, sizeof(GUID)) == 0) {
bitmap.Save(stream, &codecs[i].Clsid, NULL);
break;
}
}
static gvplugin_api_t apis[] = {
{API_render, gvrender_gdiplus_types},
{API_textlayout, gvtextlayout_gdiplus_types},
{API_loadimage, gvloadimage_gdiplus_types},
{API_device, gvdevice_gdiplus_types},
{API_device, gvdevice_gdiplus_types_for_cairo},
{(api_t)0, 0},
};
#ifdef WIN32_DLL /*visual studio*/
#ifndef GVPLUGIN_GDIPLUS_EXPORTS
__declspec(dllimport) gvplugin_library_t gvplugin_gdiplus_LTX_library = { "gdiplus", apis };
#else
__declspec(dllexport) gvplugin_library_t gvplugin_gdiplus_LTX_library = { "gdiplus", apis };
#endif
#else /*end visual studio*/
#ifdef GVDLL
__declspec(dllexport) gvplugin_library_t gvplugin_gdiplus_LTX_library = { "gdiplus", apis };
#else
extern "C" gvplugin_library_t gvplugin_gdiplus_LTX_library = { "gdiplus", apis };
#endif
#endif
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