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/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DRAGONRENDERER_P_H
#define DRAGONRENDERER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
// Mostly needed for the types like LoadedBuffers
#include <private/dragonbufferjobs_p.h>
#include <private/dragonrenderviewjobs_p.h>
#include <private/dragontexturejobs_p.h>
//
#include <private/dragonglbuffer_p.h>
#include <private/dragonglshader_p.h>
#include <private/dragonoffscreensurfacehelper_p.h>
#include <private/dragonopenglvertexarrayobject_p.h>
#include <private/dragontexture_p.h>
#include <QAtomicInt>
#include <QElapsedTimer>
#include <QMutex>
#include <QQueue>
#include <QScopedPointer>
#include <QSemaphore>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
// TODO SubmissionContext needs to be replaced because it expects to access the Renderer...
// While we're here: how much of it is needed?
class SubmissionContext;
// Consider the need for a shader cache with the new jobs - is it persistent across application
// runs?
class ShaderCache;
// TODO does this belong in this namespace?
class LoadedTexture;
// TODO do we need the VSyncFrameAdvanceService?
class VSyncFrameAdvanceService;
// TODO do we need the offscreen surface?
} // namespace Render
namespace Dragon {
// renderer.h
struct GLTexture;
class Renderer;
class GraphicsHelperInterface;
class RenderThread : public QThread
{
Q_OBJECT
public:
explicit RenderThread(Renderer *renderer);
void waitForStart(Priority priority = InheritPriority);
protected:
void run() override;
private:
Renderer *m_renderer = nullptr;
QSemaphore m_semaphore;
};
template<typename T>
struct ExplicitChangeWrapper
{
std::unique_ptr<T> operator->() {}
std::unique_ptr<T> m_data;
};
struct FrameInput
{
RenderViews renderViews;
ValueContainer<CameraMatrices> renderViewCameraMatrices;
RenderCommands renderCommands;
LoadedTextures loadedTextures;
LoadedBuffers loadedBuffers;
ValueContainer<Attribute> attributes;
ValueContainer<Parameter> parameters;
ValueContainer<Matrix4x4> worldTransforms;
ValueContainer<Shader> shaders;
TreeInfo frameGraph;
};
// TODO move to separate file
struct GLRenderTarget
{
GLuint frameBufferObjectId = 0;
QSize size;
};
class Renderer
{
public:
/*!
* \brief The Frame struct holds data that is shared across frames,
* such as already uploaded textures and active textures.
*/
struct Frame
{
int maxTextureImageUnits;
// TODO consider adding OpenGLState here
MutableContainer<GLTexture> uploadedTextures;
MutableContainer<GLShader> uploadedShaders;
MutableContainer<GLBuffer> uploadedBuffers;
QHash<VAOIdentifier, Immutable<GLVertexArrayObject>> uploadedVaos;
// TODO could be ValueContainer?
QHash<Qt3DCore::QNodeId, GLRenderTarget> createdRenderTargets;
int number = 0;
};
// TODO a cleaner option is to move all thread-specific code into a separate class
// instead of letting one class handle both cases
enum RenderType {
Synchronous,
Threaded
};
Renderer(RenderType renderType);
~Renderer();
void render();
Frame doRender(Frame previousFrame);
// Data from the aspect jobs are set and gotten with these
void addLatestData(FrameInput data);
GraphicsApiFilterData contextInfo(RenderViews views);
void initialize(QOpenGLContext *context = nullptr);
QSemaphore nextFrameSemaphore;
QOpenGLContext *openGLContext();
private:
// Render thread
QScopedPointer<RenderThread> m_renderThread;
QAtomicInt m_running;
// Render views
QMutex m_latestDataMutex;
// Context
// QScopedPointer<Render::SubmissionContext> m_submissionContext;
QMutex m_shareContextMutex;
bool m_ownedContext = false;
// TODO Protect behind a read-only barrier with a mutex, similar to RenderQueue
QQueue<FrameInput> m_latestData;
// TODO any way to reduce the number of members on this class?
QHash<QSurface *, QSharedPointer<Dragon::GraphicsHelperInterface>> m_glHelpers;
// Context information
QOpenGLContext *m_glContext = nullptr;
QOpenGLContext *m_shareContext = nullptr;
bool m_contextInfoRequested = false;
RenderViews m_requestedContextInfoViews;
QSemaphore m_writeContextInfoSemaphore;
QSemaphore m_readContextInfoSemaphore;
GraphicsApiFilterData m_contextInfo;
QSemaphore m_waitForInitializationToBeCompleted;
Immutable<RenderStateSet> m_defaultRenderStateSet;
QElapsedTimer m_elapsedTimer;
OffscreenSurfaceHelper *m_offscreenHelper;
RenderType m_renderType;
// // Shaders
// Render::ShaderCache *m_shaderCache = nullptr;
// // Other
// QScopedPointer<Render::VSyncFrameAdvanceService> m_vsyncFrameAdvanceService;
};
} // namespace Dragon
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // DRAGONRENDERER_P_H
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