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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
#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 <rhi/qshader.h>
QT_BEGIN_NAMESPACE
class QRhi;
class QRhiCommandBuffer;
class QRhiRenderPassDescriptor;
class QRhiResourceUpdateBatch;
class QRhiTexture;
class QRhiRenderBuffer;
class QSGMaterialShader;
class QSurface;
class QSGDefaultRenderContext;
namespace QSGRhiAtlasTexture {
class Manager;
}
class QSGDepthStencilBuffer
{
public:
QSGDepthStencilBuffer() { }
QSGDepthStencilBuffer(QRhiRenderBuffer *ds) : ds(ds) { }
~QSGDepthStencilBuffer();
QRhiRenderBuffer *ds = nullptr;
QSGDefaultRenderContext *rc = nullptr;
};
class Q_QUICK_EXPORT QSGDefaultRenderContext : public QSGRenderContext
{
Q_OBJECT
public:
QSGDefaultRenderContext(QSGContext *context);
QRhi *rhi() const override { return m_rhi; }
bool isValid() const override { return m_rhi != nullptr; }
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, ...
// 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,
const QQuickGraphicsConfiguration &config) override;
void beginNextFrame(QSGRenderer *renderer, const QSGRenderTarget &renderTarget,
RenderPassCallback mainPassRecordingStart,
RenderPassCallback mainPassRecordingEnd,
void *callbackUserData) override;
void renderNextFrame(QSGRenderer *renderer) override;
void endNextFrame(QSGRenderer *renderer) override;
void preprocess() override;
void invalidateGlyphCaches() override;
QSGDistanceFieldGlyphCache *distanceFieldGlyphCache(const QRawFont &font, int renderTypeQuality) override;
QSGCurveGlyphAtlas *curveGlyphAtlas(const QRawFont &font) override;
QSGTexture *createTexture(const QImage &image, uint flags) const override;
QSGRenderer *createRenderer(QSGRendererInterface::RenderMode renderMode = QSGRendererInterface::RenderMode2D) override;
QSGTexture *compressedTextureForFactory(const QSGCompressedTextureFactory *factory) const override;
virtual void initializeRhiShader(QSGMaterialShader *shader, QShader::Variant shaderVariant);
int maxTextureSize() const override { return m_maxTextureSize; }
bool useDepthBufferFor2D() const { return m_useDepthBufferFor2D; }
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;
}
QRhiResourceUpdateBatch *maybeGlyphCacheResourceUpdates();
QRhiResourceUpdateBatch *glyphCacheResourceUpdates();
void deferredReleaseGlyphCacheTexture(QRhiTexture *texture);
void resetGlyphCacheResources();
QSharedPointer<QSGDepthStencilBuffer> getDepthStencilBuffer(const QSize &size, int sampleCount);
void addDepthStencilBuffer(const QSharedPointer<QSGDepthStencilBuffer> &ds);
protected:
InitParams m_initParams;
QRhi *m_rhi;
int m_maxTextureSize;
QSGRhiAtlasTexture::Manager *m_rhiAtlasManager;
QRhiCommandBuffer *m_currentFrameCommandBuffer;
QRhiRenderPassDescriptor *m_currentFrameRenderPass;
qreal m_currentDevicePixelRatio;
bool m_useDepthBufferFor2D;
QRhiResourceUpdateBatch *m_glyphCacheResourceUpdates;
QSet<QRhiTexture *> m_pendingGlyphCacheTextures;
QHash<FontKey, QSGCurveGlyphAtlas *> m_curveGlyphAtlases;
QHash<std::pair<QSize, int>, QWeakPointer<QSGDepthStencilBuffer>> m_depthStencilBuffers;
friend class QSGDepthStencilBuffer;
};
QT_END_NAMESPACE
#endif // QSGDEFAULTRENDERCONTEXT_H
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