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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QSGDEFAULTRENDERCONTEXT_H
#define QSGDEFAULTRENDERCONTEXT_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtQuick/private/qsgcontext_p.h>
#include <QtGui/private/qshader_p.h>
#if QT_CONFIG(opengl)
#include <QtQuick/private/qsgdepthstencilbuffer_p.h>
#endif
QT_BEGIN_NAMESPACE
class QRhi;
class QRhiCommandBuffer;
class QRhiRenderPassDescriptor;
class QOpenGLContext;
class QSGMaterialShader;
class QSGMaterialRhiShader;
class QOpenGLFramebufferObject;
class QSGDepthStencilBufferManager;
class QSGDepthStencilBuffer;
namespace QSGOpenGLAtlasTexture {
class Manager;
}
namespace QSGRhiAtlasTexture {
class Manager;
}
class Q_QUICK_PRIVATE_EXPORT QSGDefaultRenderContext : public QSGRenderContext
{
Q_OBJECT
public:
QSGDefaultRenderContext(QSGContext *context);
QRhi *rhi() const override { return m_rhi; }
QOpenGLContext *openglContext() const { return m_gl; }
bool isValid() const override { return m_gl || m_rhi; }
static const int INIT_PARAMS_MAGIC = 0x50E;
struct InitParams : public QSGRenderContext::InitParams {
int sType = INIT_PARAMS_MAGIC; // help discovering broken code passing something else as 'context'
QRhi *rhi = nullptr;
int sampleCount = 1; // 1, 4, 8, ...
QOpenGLContext *openGLContext = nullptr; // ### Qt 6: remove
// only used as a hint f.ex. in the texture atlas init
QSize initialSurfacePixelSize;
// The first window that will be used with this rc, if available.
// Only a hint, to help picking better values for atlases.
QSurface *maybeSurface = nullptr;
};
void initialize(const QSGRenderContext::InitParams *params) override;
void invalidate() override;
void prepareSync(qreal devicePixelRatio, QRhiCommandBuffer *cb) override;
void beginNextFrame(QSGRenderer *renderer,
RenderPassCallback mainPassRecordingStart,
RenderPassCallback mainPassRecordingEnd,
void *callbackUserData) override;
void renderNextFrame(QSGRenderer *renderer, uint fboId) override;
void endNextFrame(QSGRenderer *renderer) override;
void beginNextRhiFrame(QSGRenderer *renderer,
QRhiRenderTarget *rt, QRhiRenderPassDescriptor *rp, QRhiCommandBuffer *cb,
RenderPassCallback mainPassRecordingStart,
RenderPassCallback mainPassRecordingEnd,
void *callbackUserData) override;
void renderNextRhiFrame(QSGRenderer *renderer) override;
void endNextRhiFrame(QSGRenderer *renderer) override;
void preprocess() override;
QSGDistanceFieldGlyphCache *distanceFieldGlyphCache(const QRawFont &font) override;
virtual QSharedPointer<QSGDepthStencilBuffer> depthStencilBufferForFbo(QOpenGLFramebufferObject *fbo);
QSGDepthStencilBufferManager *depthStencilBufferManager();
QSGTexture *createTexture(const QImage &image, uint flags) const override;
QSGRenderer *createRenderer() override;
QSGTexture *compressedTextureForFactory(const QSGCompressedTextureFactory *factory) const override;
virtual void compileShader(QSGMaterialShader *shader, QSGMaterial *material, const char *vertexCode = nullptr, const char *fragmentCode = nullptr);
virtual void initializeShader(QSGMaterialShader *shader);
virtual void initializeRhiShader(QSGMaterialRhiShader *shader, QShader::Variant shaderVariant);
void setAttachToGraphicsContext(bool attach) override;
static QSGDefaultRenderContext *from(QOpenGLContext *context);
bool hasBrokenIndexBufferObjects() const { return m_brokenIBOs; }
int maxTextureSize() const override { return m_maxTextureSize; }
bool separateIndexBuffer() const;
int msaaSampleCount() const { return m_initParams.sampleCount; }
QRhiCommandBuffer *currentFrameCommandBuffer() const {
// may be null if not in an active frame, but returning null is valid then
return m_currentFrameCommandBuffer;
}
QRhiRenderPassDescriptor *currentFrameRenderPass() const {
// may be null if not in an active frame, but returning null is valid then
return m_currentFrameRenderPass;
}
qreal currentDevicePixelRatio() const
{
// Valid starting from QQuickWindow::syncSceneGraph(). This takes the
// redirections, e.g. QQuickWindow::setRenderTarget(), into account.
// This calculation logic matches what the renderer does, so this is
// the same value that gets exposed in RenderState::devicePixelRatio()
// to material shaders. This getter is useful to perform dpr-related
// operations in the sync phase (in updatePaintNode()).
return m_currentDevicePixelRatio;
}
protected:
static QString fontKey(const QRawFont &font);
InitParams m_initParams;
QRhi *m_rhi;
QOpenGLContext *m_gl;
QSGDepthStencilBufferManager *m_depthStencilManager;
int m_maxTextureSize;
bool m_brokenIBOs;
bool m_serializedRender;
bool m_attachToGLContext;
QSGOpenGLAtlasTexture::Manager *m_glAtlasManager;
QSGRhiAtlasTexture::Manager *m_rhiAtlasManager;
QRhiCommandBuffer *m_currentFrameCommandBuffer;
QRhiRenderPassDescriptor *m_currentFrameRenderPass;
qreal m_currentDevicePixelRatio;
};
QT_END_NAMESPACE
#endif // QSGDEFAULTRENDERCONTEXT_H
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