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// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#include "image_resources.h"
#include <memory>
#include <map>
#include <wx/wfstream.h>
#include <wx/zipstrm.h>
#include <wx/image.h>
#include <wx/mstream.h>
#include <zen/utf.h>
#include "image_tools.h"
using namespace zen;
namespace
{
void loadAnimFromZip(wxZipInputStream& zipInput, wxAnimation& anim)
{
//work around wxWidgets bug:
//construct seekable input stream (zip-input stream is not seekable) for wxAnimation::Load()
//luckily this method call is very fast: below measurement precision!
std::vector<char> data;
data.reserve(10000);
int newValue = 0;
while ((newValue = zipInput.GetC()) != wxEOF)
data.push_back(newValue);
wxMemoryInputStream seekAbleStream(&data.front(), data.size()); //stream does not take ownership of data
anim.Load(seekAbleStream, wxANIMATION_TYPE_GIF);
}
class GlobalResources
{
public:
static GlobalResources& instance()
{
#if defined _MSC_VER && _MSC_VER < 1900
#error function scope static initialization is not yet thread-safe!
#endif
static GlobalResources inst;
return inst;
}
void init(const Zstring& filepath);
void cleanup()
{
bitmaps.clear();
anims.clear();
}
const wxBitmap& getImage (const wxString& name) const;
const wxAnimation& getAnimation(const wxString& name) const;
private:
GlobalResources() {}
~GlobalResources() { assert(bitmaps.empty() && anims.empty()); } //don't leave wxWidgets objects for static destruction!
GlobalResources (const GlobalResources&) = delete;
GlobalResources& operator=(const GlobalResources&) = delete;
std::map<wxString, wxBitmap> bitmaps;
std::map<wxString, wxAnimation> anims;
};
void GlobalResources::init(const Zstring& filepath)
{
assert(bitmaps.empty() && anims.empty());
wxFFileInputStream input(utfCvrtTo<wxString>(filepath));
if (input.IsOk()) //if not... we don't want to react too harsh here
{
//activate support for .png files
wxImage::AddHandler(new wxPNGHandler); //ownership passed
wxZipInputStream streamIn(input, wxConvUTF8);
//do NOT rely on wxConvLocal! On failure shows unhelpful popup "Cannot convert from the charset 'Unknown encoding (-1)'!"
for (;;)
{
std::unique_ptr<wxZipEntry> entry(streamIn.GetNextEntry()); //take ownership!
if (!entry)
break;
const wxString name = entry->GetName();
//generic image loading
if (endsWith(name, L".png"))
{
wxImage img(streamIn, wxBITMAP_TYPE_PNG);
//end this alpha/no-alpha/mask/wxDC::DrawBitmap/RTL/high-contrast-scheme interoperability nightmare here and now!!!!
//=> there's only one type of png image: with alpha channel, no mask!!!
convertToVanillaImage(img);
bitmaps.emplace(name, img);
}
else if (endsWith(name, L".gif"))
loadAnimFromZip(streamIn, anims[name]);
}
}
}
const wxBitmap& GlobalResources::getImage(const wxString& name) const
{
auto it = bitmaps.find(contains(name, L'.') ? name : name + L".png"); //assume .png ending if nothing else specified
if (it != bitmaps.end())
return it->second;
assert(false);
return wxNullBitmap;
}
const wxAnimation& GlobalResources::getAnimation(const wxString& name) const
{
auto it = anims.find(contains(name, L'.') ? name : name + L".gif");
if (it != anims.end())
return it->second;
assert(false);
return wxNullAnimation;
}
}
void zen::initResourceImages(const Zstring& filepath) { GlobalResources::instance().init(filepath); }
void zen::cleanupResourceImages() { GlobalResources::instance().cleanup(); }
const wxBitmap& zen::getResourceImage(const wxString& name) { return GlobalResources::instance().getImage(name); }
const wxAnimation& zen::getResourceAnimation(const wxString& name) { return GlobalResources::instance().getAnimation(name); }
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