зеркало из https://github.com/mozilla/gecko-dev.git
86 строки
1.7 KiB
C++
86 строки
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* 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/. */
|
|
|
|
#include "WindowsEMF.h"
|
|
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
|
|
WindowsEMF::WindowsEMF()
|
|
: mDC(nullptr)
|
|
, mEmf(nullptr)
|
|
{
|
|
}
|
|
|
|
WindowsEMF::~WindowsEMF()
|
|
{
|
|
FinishDocument();
|
|
ReleaseEMFHandle();
|
|
}
|
|
|
|
bool
|
|
WindowsEMF::InitForDrawing(const wchar_t* aMetafilePath /* = nullptr */)
|
|
{
|
|
MOZ_ASSERT(!mDC && !mEmf, "InitForDrawing and InitFromFileContents is"
|
|
" designed to be used either one at once.");
|
|
|
|
mDC = ::CreateEnhMetaFile(nullptr, aMetafilePath, nullptr, nullptr);
|
|
return !!mDC;
|
|
}
|
|
|
|
bool
|
|
WindowsEMF::InitFromFileContents(const wchar_t* aMetafilePath)
|
|
{
|
|
MOZ_ASSERT(aMetafilePath);
|
|
MOZ_ASSERT(!mDC && !mEmf, "InitForDrawing and InitFromFileContents is"
|
|
" designed to be used either one at once.");
|
|
|
|
mEmf = ::GetEnhMetaFileW(aMetafilePath);
|
|
return !!mEmf;
|
|
}
|
|
|
|
bool
|
|
WindowsEMF::FinishDocument()
|
|
{
|
|
if (mDC) {
|
|
mEmf = ::CloseEnhMetaFile(mDC);
|
|
mDC = nullptr;
|
|
}
|
|
return !!mEmf;
|
|
}
|
|
|
|
void
|
|
WindowsEMF::ReleaseEMFHandle()
|
|
{
|
|
if (mEmf) {
|
|
::DeleteEnhMetaFile(mEmf);
|
|
mEmf = nullptr;
|
|
}
|
|
}
|
|
|
|
bool
|
|
WindowsEMF::Playback(HDC aDeviceContext, const RECT* aRect)
|
|
{
|
|
MOZ_ASSERT(aRect);
|
|
if (!FinishDocument()) {
|
|
return false;
|
|
}
|
|
|
|
return ::PlayEnhMetaFile(aDeviceContext, mEmf, aRect) != 0;
|
|
}
|
|
|
|
bool
|
|
WindowsEMF::SaveToFile()
|
|
{
|
|
if (!FinishDocument()) {
|
|
return false;
|
|
}
|
|
ReleaseEMFHandle();
|
|
return true;
|
|
}
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|