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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef DONT_HAVE_GDIPLUS
#include <global.hxx>
#include <thumbviewer.hxx>
#include <shlxthdl.hxx>
#include <registry.hxx>
#include <fileextensions.hxx>
#include <config.hxx>
#include <zipfile.hxx>
#include <utilities.hxx>
#include <resource.h>
#include <stdio.h>
#include <utility>
#include <stdlib.h>
#if defined _MSC_VER
#pragma warning(push, 1)
#endif
#include <shellapi.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif
#include <memory>
namespace internal
{
/* The signet.png used for thumbnails of signed documents
is contained as resource in this module, the resource
id is 2000 */
void LoadSignetImageFromResource(ZipFile::ZipContentBuffer_t& buffer)
{
HRSRC hrc = FindResourceW(g_hModule, L"#2000", RT_RCDATA);
DWORD size = SizeofResource(g_hModule, hrc);
HGLOBAL hglob = LoadResource(g_hModule, hrc);
char* data = static_cast<char*>(LockResource(hglob));
buffer = ZipFile::ZipContentBuffer_t(data, data + size);
}
bool IsSignedDocument(const ZipFile* zipfile)
{
return zipfile->HasContent("META-INF/documentsignatures.xml");
}
Gdiplus::Point CalcSignetPosition(
const Gdiplus::Rect& canvas, const Gdiplus::Rect& thumbnail_border, const Gdiplus::Rect& signet)
{
int x = 0;
int y = 0;
int hoffset = canvas.GetRight() - thumbnail_border.GetRight();
int voffset = canvas.GetBottom() - thumbnail_border.GetBottom();
if (hoffset > voffset)
{
x = thumbnail_border.GetRight() - signet.GetRight() + min(signet.GetRight() / 2, hoffset);
y = thumbnail_border.GetBottom() - signet.GetBottom();
}
else
{
x = thumbnail_border.GetRight() - signet.GetRight();
y = thumbnail_border.GetBottom() - signet.GetBottom() + min(signet.GetBottom() / 2, voffset);
}
return Gdiplus::Point(x,y);
}
}
namespace {
Gdiplus::Rect CalcScaledAspectRatio(const Gdiplus::Rect& src, const Gdiplus::Rect& dest)
{
Gdiplus::Rect result;
if (src.Width >= src.Height)
result = Gdiplus::Rect(0, 0, dest.Width, src.Height * dest.Width / src.Width);
else
result = Gdiplus::Rect(0, 0, src.Width * dest.Height / src.Height, dest.Height);
return result;
}
}
class StreamOnZipBuffer final : public IStream
{
public:
explicit StreamOnZipBuffer(const ZipFile::ZipContentBuffer_t& zip_buffer);
// IUnknown
virtual ULONG STDMETHODCALLTYPE AddRef() override;
virtual ULONG STDMETHODCALLTYPE Release() override;
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject) override;
// IStream
virtual HRESULT STDMETHODCALLTYPE Read(void *pv, ULONG cb, ULONG *pcbRead) override;
virtual HRESULT STDMETHODCALLTYPE Write(void const *pv, ULONG cb, ULONG *pcbWritten) override;
virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition) override;
virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER libNewSize) override;
virtual HRESULT STDMETHODCALLTYPE CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten) override;
virtual HRESULT STDMETHODCALLTYPE Commit(DWORD grfCommitFlags) override;
virtual HRESULT STDMETHODCALLTYPE Revert() override;
virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) override;
virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) override;
virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG *pstatstg, DWORD grfStatFlag) override;
virtual HRESULT STDMETHODCALLTYPE Clone(IStream **ppstm) override;
private:
LONG ref_count_;
const ZipFile::ZipContentBuffer_t& ref_zip_buffer_;
size_t pos_;
};
StreamOnZipBuffer::StreamOnZipBuffer(const ZipFile::ZipContentBuffer_t& zip_buffer) :
ref_count_(1),
ref_zip_buffer_(zip_buffer),
pos_(0)
{
}
// IUnknown methods
ULONG STDMETHODCALLTYPE StreamOnZipBuffer::AddRef()
{
return InterlockedIncrement(&ref_count_);
}
ULONG STDMETHODCALLTYPE StreamOnZipBuffer::Release()
{
long refcnt = InterlockedDecrement(&ref_count_);
if (0 == ref_count_)
delete this;
return refcnt;
}
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
{
*ppvObject = nullptr;
IUnknown* pUnk = nullptr;
if ((IID_IUnknown == riid) || (IID_IStream == riid))
{
pUnk = static_cast<IStream*>(this);
pUnk->AddRef();
*ppvObject = pUnk;
return S_OK;
}
return E_NOINTERFACE;
}
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Read(void *pv, ULONG cb, ULONG *pcbRead)
{
if (pv == nullptr)
return STG_E_INVALIDPOINTER;
size_t size = ref_zip_buffer_.size();
if (pos_ > size)
return S_FALSE;
char* p = static_cast<char*>(pv);
ULONG read = 0;
for ( ;(pos_ < size) && (cb > 0); pos_++, cb--, read++)
*p++ = ref_zip_buffer_[pos_];
if (pcbRead)
*pcbRead = read;
return S_OK;
}
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *)
{
__int64 size = static_cast<__int64>(ref_zip_buffer_.size());
__int64 p = 0;
switch (dwOrigin)
{
case STREAM_SEEK_SET:
break;
case STREAM_SEEK_CUR:
p = static_cast<__int64>(pos_);
break;
case STREAM_SEEK_END:
p = size - 1;
break;
}
HRESULT hr = STG_E_INVALIDFUNCTION;
p += dlibMove.QuadPart;
if ( ( p >= 0 ) && (p < size) )
{
pos_ = static_cast<size_t>(p);
hr = S_OK;
}
return hr;
}
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Stat(STATSTG *pstatstg, DWORD grfStatFlag)
{
if (pstatstg == nullptr)
return STG_E_INVALIDPOINTER;
ZeroMemory(pstatstg, sizeof(STATSTG));
if (grfStatFlag == STATFLAG_DEFAULT)
{
size_t sz = 4 * sizeof(wchar_t);
wchar_t* name = static_cast<wchar_t*>(CoTaskMemAlloc(sz));
ZeroMemory(name, sz);
memcpy(name, L"png", 3 * sizeof(wchar_t));
pstatstg->pwcsName = name;
}
pstatstg->type = STGTY_LOCKBYTES;
ULARGE_INTEGER uli;
uli.LowPart = static_cast<DWORD>(ref_zip_buffer_.size());
uli.HighPart = 0;
pstatstg->cbSize = uli;
return S_OK;
}
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Write(void const *, ULONG, ULONG *)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::SetSize(ULARGE_INTEGER)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::CopyTo(IStream *, ULARGE_INTEGER, ULARGE_INTEGER *, ULARGE_INTEGER *)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Commit(DWORD)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Revert()
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE StreamOnZipBuffer::Clone(IStream **)
{ return E_NOTIMPL; }
CThumbviewer::CThumbviewer(long RefCnt) :
ref_count_(RefCnt)
{
InterlockedIncrement(&g_DllRefCnt);
thumbnail_size_.cx = 0;
thumbnail_size_.cy = 0;
Gdiplus::GdiplusStartupInput gdiplusStartupInput;
Gdiplus::GdiplusStartup(&gdiplus_token_, &gdiplusStartupInput, nullptr);
ZipFile::ZipContentBuffer_t img_data;
internal::LoadSignetImageFromResource(img_data);
IStream* stream = new StreamOnZipBuffer(img_data);
signet_ = new Gdiplus::Bitmap(stream, TRUE);
stream->Release();
}
CThumbviewer::~CThumbviewer()
{
delete signet_;
Gdiplus::GdiplusShutdown(gdiplus_token_);
InterlockedDecrement(&g_DllRefCnt);
}
// IUnknown methods
HRESULT STDMETHODCALLTYPE CThumbviewer::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
{
*ppvObject = nullptr;
IUnknown* pUnk = nullptr;
if ((IID_IUnknown == riid) || (IID_IPersistFile == riid))
{
pUnk = static_cast<IPersistFile*>(this);
pUnk->AddRef();
*ppvObject = pUnk;
return S_OK;
}
else if (IID_IExtractImage == riid)
{
pUnk = static_cast<IExtractImage*>(this);
pUnk->AddRef();
*ppvObject = pUnk;
return S_OK;
}
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE CThumbviewer::AddRef()
{
return InterlockedIncrement(&ref_count_);
}
ULONG STDMETHODCALLTYPE CThumbviewer::Release()
{
long refcnt = InterlockedDecrement(&ref_count_);
if (0 == ref_count_)
delete this;
return refcnt;
}
// IExtractImage2 methods
const std::string THUMBNAIL_CONTENT = "Thumbnails/thumbnail.png";
HRESULT STDMETHODCALLTYPE CThumbviewer::Extract(HBITMAP *phBmpImage)
{
HRESULT hr = E_FAIL;
try
{
std::wstring fname = getShortPathName( filename_ );
std::unique_ptr<ZipFile> zipfile( new ZipFile( fname ) );
if (zipfile->HasContent(THUMBNAIL_CONTENT))
{
ZipFile::ZipContentBuffer_t thumbnail;
zipfile->GetUncompressedContent(THUMBNAIL_CONTENT, thumbnail);
IStream* stream = new StreamOnZipBuffer(thumbnail);
Gdiplus::Bitmap thumbnail_png(stream, TRUE);
if ((thumbnail_png.GetHeight() == 0) || (thumbnail_png.GetWidth() == 0))
{
stream->Release();
return E_FAIL;
}
HWND hwnd = GetDesktopWindow();
HDC hdc = GetDC(hwnd);
HDC memDC = CreateCompatibleDC(hdc);
if (memDC)
{
UINT offset = 3; // reserve a little border space
Gdiplus::Rect canvas(0, 0, thumbnail_size_.cx, thumbnail_size_.cy);
Gdiplus::Rect canvas_thumbnail(offset, offset, thumbnail_size_.cx - 2 * offset, thumbnail_size_.cy - 2 * offset);
Gdiplus::Rect scaledRect = CalcScaledAspectRatio(
Gdiplus::Rect(0, 0, thumbnail_png.GetWidth(), thumbnail_png.GetHeight()), canvas_thumbnail);
struct {
BITMAPINFOHEADER bi;
DWORD ct[256];
} dib;
ZeroMemory(&dib, sizeof(dib));
dib.bi.biSize = sizeof(BITMAPINFOHEADER);
dib.bi.biWidth = thumbnail_size_.cx;
dib.bi.biHeight = thumbnail_size_.cy;
dib.bi.biPlanes = 1;
dib.bi.biBitCount = static_cast<WORD>(color_depth_);
dib.bi.biCompression = BI_RGB;
LPVOID lpBits;
HBITMAP hMemBmp = CreateDIBSection(memDC, reinterpret_cast<LPBITMAPINFO>(&dib), DIB_RGB_COLORS, &lpBits, nullptr, 0);
HGDIOBJ hOldObj = SelectObject(memDC, hMemBmp);
Gdiplus::Graphics graphics(memDC);
Gdiplus::Pen blackPen(Gdiplus::Color(255, 0, 0, 0), 1);
Gdiplus::SolidBrush whiteBrush(Gdiplus::Color(255, 255, 255, 255));
graphics.FillRectangle(&whiteBrush, canvas);
scaledRect.X = (canvas.Width - scaledRect.Width) / 2;
scaledRect.Y = (canvas.Height - scaledRect.Height) / 2;
Gdiplus::Rect border_rect(scaledRect.X, scaledRect.Y, scaledRect.Width, scaledRect.Height);
graphics.DrawRectangle(&blackPen, border_rect);
scaledRect.X += 1;
scaledRect.Y += 1;
scaledRect.Width -= 1;
scaledRect.Height -= 1;
graphics.SetInterpolationMode(Gdiplus::InterpolationModeHighQualityBicubic);
Gdiplus::Status stat = graphics.DrawImage(
&thumbnail_png, scaledRect, 0 , 0,
thumbnail_png.GetWidth(), thumbnail_png.GetHeight(), Gdiplus::UnitPixel);
/* Add a signet sign to the thumbnail of signed documents */
if (internal::IsSignedDocument(zipfile.get()))
{
double SCALING_FACTOR = 0.6;
Gdiplus::Rect signet_scaled(
0, 0, static_cast<INT>(signet_->GetWidth() * SCALING_FACTOR), static_cast<INT>(signet_->GetHeight() * SCALING_FACTOR));
Gdiplus::Point pos_signet = internal::CalcSignetPosition(canvas_thumbnail, border_rect, signet_scaled);
Gdiplus::Rect dest(pos_signet.X, pos_signet.Y, signet_scaled.GetRight(), signet_scaled.GetBottom());
stat = graphics.DrawImage(
signet_, dest,
0, 0, signet_->GetWidth(), signet_->GetHeight(),
Gdiplus::UnitPixel);
}
if (stat == Gdiplus::Ok)
{
*phBmpImage = hMemBmp;
hr = NOERROR;
}
SelectObject(memDC, hOldObj);
DeleteDC(memDC);
}
ReleaseDC(hwnd, hdc);
stream->Release();
}
}
catch(std::exception&)
{
OutputDebugStringFormatW( L"CThumbviewer Extract ERROR!\n" );
hr = E_FAIL;
}
return hr;
}
HRESULT STDMETHODCALLTYPE CThumbviewer::GetLocation(
LPWSTR pszPathBuffer, DWORD cchMax, DWORD *pdwPriority, const SIZE *prgSize, DWORD dwRecClrDepth, DWORD *pdwFlags)
{
if ((prgSize == nullptr) || (pdwFlags == nullptr) || ((*pdwFlags & IEIFLAG_ASYNC) && (pdwPriority == nullptr)))
return E_INVALIDARG;
thumbnail_size_ = *prgSize;
color_depth_ = dwRecClrDepth;
*pdwFlags = IEIFLAG_CACHE; // we don't cache the image
wcsncpy(pszPathBuffer, filename_.c_str(), cchMax);
return NOERROR;
}
// IPersist methods
HRESULT STDMETHODCALLTYPE CThumbviewer::GetClassID(CLSID* pClassID)
{
pClassID = const_cast<CLSID*>(&CLSID_THUMBVIEWER_HANDLER);
return S_OK;
}
// IPersistFile methods
HRESULT STDMETHODCALLTYPE CThumbviewer::Load(LPCOLESTR pszFileName, DWORD)
{
filename_ = pszFileName;
return S_OK;
}
HRESULT STDMETHODCALLTYPE CThumbviewer::IsDirty()
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE CThumbviewer::Save(LPCOLESTR, BOOL)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE CThumbviewer::SaveCompleted(LPCOLESTR)
{ return E_NOTIMPL; }
HRESULT STDMETHODCALLTYPE CThumbviewer::GetCurFile(LPOLESTR __RPC_FAR*)
{ return E_NOTIMPL; }
#endif // DONT_HAVE_GDIPLUS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|