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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwindowsdirect2dcontext.h"
#include "qwindowsdirect2dhelpers.h"
#include "qwindowsdirect2ddevicecontext.h"
#include <wrl.h>
using Microsoft::WRL::ComPtr;
QT_BEGIN_NAMESPACE
class QWindowsDirect2DDeviceContextPrivate {
public:
QWindowsDirect2DDeviceContextPrivate(ID2D1DeviceContext *dc)
: deviceContext(dc)
{
if (!dc) {
HRESULT hr = QWindowsDirect2DContext::instance()->d2dDevice()->CreateDeviceContext(
D2D1_DEVICE_CONTEXT_OPTIONS_NONE,
&deviceContext);
if (Q_UNLIKELY(FAILED(hr)))
qFatal("%s: Couldn't create Direct2D Device Context: %#lx", __FUNCTION__, hr);
}
Q_ASSERT(deviceContext);
deviceContext->SetUnitMode(D2D1_UNIT_MODE_PIXELS);
}
void begin()
{
Q_ASSERT(deviceContext);
Q_ASSERT(refCount >= 0);
if (refCount == 0)
deviceContext->BeginDraw();
refCount++;
}
bool end()
{
Q_ASSERT(deviceContext);
Q_ASSERT(refCount > 0);
bool success = true;
refCount--;
if (refCount == 0) {
D2D1_TAG tag1, tag2;
HRESULT hr = deviceContext->EndDraw(&tag1, &tag2);
if (FAILED(hr)) {
success = false;
qWarning("%s: EndDraw failed: %#lx, tag1: %lld, tag2: %lld",
__FUNCTION__, long(hr), tag1, tag2);
}
}
return success;
}
ComPtr<ID2D1DeviceContext> deviceContext;
int refCount = 0;
};
QWindowsDirect2DDeviceContext::QWindowsDirect2DDeviceContext(ID2D1DeviceContext *dc)
: d_ptr(new QWindowsDirect2DDeviceContextPrivate(dc))
{
}
QWindowsDirect2DDeviceContext::~QWindowsDirect2DDeviceContext()
{
}
ID2D1DeviceContext *QWindowsDirect2DDeviceContext::get() const
{
Q_D(const QWindowsDirect2DDeviceContext);
Q_ASSERT(d->deviceContext);
return d->deviceContext.Get();
}
void QWindowsDirect2DDeviceContext::begin()
{
Q_D(QWindowsDirect2DDeviceContext);
d->begin();
}
bool QWindowsDirect2DDeviceContext::end()
{
Q_D(QWindowsDirect2DDeviceContext);
return d->end();
}
void QWindowsDirect2DDeviceContext::suspend()
{
Q_D(QWindowsDirect2DDeviceContext);
if (d->refCount > 0)
d->deviceContext->EndDraw();
}
void QWindowsDirect2DDeviceContext::resume()
{
Q_D(QWindowsDirect2DDeviceContext);
if (d->refCount > 0)
d->deviceContext->BeginDraw();
}
QWindowsDirect2DDeviceContextSuspender::QWindowsDirect2DDeviceContextSuspender(QWindowsDirect2DDeviceContext *dc)
: m_dc(dc)
{
Q_ASSERT(m_dc);
m_dc->suspend();
}
QWindowsDirect2DDeviceContextSuspender::~QWindowsDirect2DDeviceContextSuspender()
{
resume();
}
void QWindowsDirect2DDeviceContextSuspender::resume()
{
if (m_dc) {
m_dc->resume();
m_dc = nullptr;
}
}
QT_END_NAMESPACE
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