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/* $Id: gvdevice_gdiplus.cpp,v 1.6 2009/07/07 01:36:58 glenlow Exp $ $Revision: 1.6 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 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 *
**********************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gvplugin_device.h"
#include "gvplugin_render.h"
#include "graph.h"
#include "gvplugin_gdiplus.h"
extern "C" size_t gvwrite(GVJ_t *job, const unsigned char *s, unsigned int len);
using namespace Gdiplus;
static void gdiplus_format(GVJ_t *job)
{
UseGdiplus();
/* allocate memory and attach stream to it */
HGLOBAL buffer = GlobalAlloc(GMEM_MOVEABLE, 0);
IStream *stream = NULL;
CreateStreamOnHGlobal(buffer, FALSE, &stream); /* FALSE means don't deallocate buffer when releasing stream */
Bitmap bitmap(
job->width, /* width in pixels */
job->height, /* height in pixels */
job->width * BYTES_PER_PIXEL, /* bytes per row: exactly width # of pixels */
PixelFormat32bppPARGB, /* pixel format: corresponds to CAIRO_FORMAT_ARGB32 */
(BYTE*)job->imagedata); /* pixel data from job */
SaveBitmapToStream(bitmap, stream, job->device.id);
/* blast the streamed buffer back to the gvdevice */
/* NOTE: this is somewhat inefficient since we should be streaming directly to gvdevice rather than buffering first */
/* ... however, GDI+ requires any such direct IStream to implement Seek Read, Write, Stat methods and gvdevice really only offers a write-once model */
stream->Release();
gvwrite(job, (const unsigned char*)GlobalLock(buffer), GlobalSize(buffer));
GlobalFree(buffer);
}
static gvdevice_engine_t gdiplus_engine = {
NULL, /* gdiplus_initialize */
gdiplus_format,
NULL, /* gdiplus_finalize */
};
static gvdevice_features_t device_features_gdiplus = {
GVDEVICE_BINARY_FORMAT
| GVDEVICE_DOES_TRUECOLOR,/* flags */
{0.,0.}, /* default margin - points */
{0.,0.}, /* default page width, height - points */
{96.,96.}, /* dpi */
};
gvplugin_installed_t gvdevice_gdiplus_types_for_cairo[] = {
{FORMAT_BMP, "bmp:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_GIF, "gif:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_JPEG, "jpe:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_JPEG, "jpeg:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_JPEG, "jpg:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_PNG, "png:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_TIFF, "tif:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{FORMAT_TIFF, "tiff:cairo", 8, &gdiplus_engine, &device_features_gdiplus},
{0, NULL, 0, NULL, NULL}
};
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