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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
*************************************************************************/
#include "config.h"
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <util/gv_math.h>
#include <gvc/gvplugin_loadimage.h>
#include "gvplugin_gdiplus.h"
#include <stringapiset.h>
#include <windows.h>
#include <gdiplus.h>
#include <vector>
using namespace Gdiplus;
static void gdiplus_freeimage(usershape_t *us) {
delete reinterpret_cast<Image*>(us->data);
}
// convert a UTF-8 string to UTF-16
static std::vector<wchar_t> utf8_to_utf16(const char *s) {
// how much space do we need for the UTF-16 string?
const int wide_count = MultiByteToWideChar(CP_UTF8, 0, s, -1, nullptr, 0);
// translate it
std::vector<wchar_t> utf16(wide_count);
if (wide_count > 0) {
(void)MultiByteToWideChar(CP_UTF8, 0, s, -1, utf16.data(), wide_count);
} else {
utf16.push_back(0);
}
return utf16;
}
static Image *gdiplus_loadimage(usershape_t *us) {
assert(us);
assert(us->name);
if (us->data && us->datafree != gdiplus_freeimage) {
us->datafree(us); /* free incompatible cache data */
us->data = nullptr;
us->datafree = nullptr;
}
if (!us->data) { /* read file into cache */
if (!gvusershape_file_access(us))
return nullptr;
/* create image from the usershape file */
const std::vector<wchar_t> filename = utf8_to_utf16(us->name);
us->data = Image::FromFile(filename.data());
/* clean up */
if (us->data)
us->datafree = gdiplus_freeimage;
gvusershape_file_release(us);
}
return reinterpret_cast<Image*>(us->data);
}
static void gdiplus_loadimage_gdiplus(GVJ_t * job, usershape_t *us, boxf b, bool)
{
/* get the image from usershape details, then blit it to the context */
if (Image *image = gdiplus_loadimage(us)) {
assert(job != NULL);
auto g = reinterpret_cast<Graphics*>(job->context);
g->DrawImage(image, RectF(d2f(b.LL.x), d2f(b.LL.y), d2f(b.UR.x - b.LL.x),
d2f(b.UR.y - b.LL.y)));
}
}
static gvloadimage_engine_t engine = {
gdiplus_loadimage_gdiplus
};
gvplugin_installed_t gvloadimage_gdiplus_types[] = {
{FORMAT_BMP, "bmp:gdiplus", 8, &engine, nullptr},
{FORMAT_GIF, "gif:gdiplus", 8, &engine, nullptr},
{FORMAT_JPEG, "jpe:gdiplus", 8, &engine, nullptr},
{FORMAT_JPEG, "jpeg:gdiplus", 8, &engine, nullptr},
{FORMAT_JPEG, "jpg:gdiplus", 8, &engine, nullptr},
{FORMAT_PNG, "png:gdiplus", 8, &engine, nullptr},
{0, nullptr, 0, nullptr, nullptr}
};
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