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// Copyright (C) 2021 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 QBACKINGSTOREDEFAULTCOMPOSITOR_P_H
#define QBACKINGSTOREDEFAULTCOMPOSITOR_P_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 <qpa/qplatformbackingstore.h>
#include <rhi/qrhi.h>
QT_BEGIN_NAMESPACE
class QBackingStoreDefaultCompositor
{
public:
~QBackingStoreDefaultCompositor();
void reset();
QRhiTexture *toTexture(const QPlatformBackingStore *backingStore,
QRhi *rhi,
QRhiResourceUpdateBatch *resourceUpdates,
const QRegion &dirtyRegion,
QPlatformBackingStore::TextureFlags *flags) const;
QPlatformBackingStore::FlushResult flush(QPlatformBackingStore *backingStore,
QRhi *rhi,
QRhiSwapChain *swapchain,
QWindow *window,
qreal sourceDevicePixelRatio,
const QRegion ®ion,
const QPoint &offset,
QPlatformTextureList *textures,
bool translucentBackground);
private:
enum UpdateUniformOption {
NeedsRedBlueSwap = 1 << 0,
NeedsAlphaRotate = 1 << 1
};
Q_DECLARE_FLAGS(UpdateUniformOptions, UpdateUniformOption)
enum UpdateQuadDataOption {
NeedsLinearFiltering = 1 << 0
};
Q_DECLARE_FLAGS(UpdateQuadDataOptions, UpdateQuadDataOption)
void ensureResources(QRhiResourceUpdateBatch *resourceUpdates, QRhiRenderPassDescriptor *rpDesc);
QRhiTexture *toTexture(const QImage &image,
QRhi *rhi,
QRhiResourceUpdateBatch *resourceUpdates,
const QRegion &dirtyRegion,
QPlatformBackingStore::TextureFlags *flags) const;
mutable QRhi *m_rhi = nullptr;
mutable std::unique_ptr<QRhiTexture> m_texture;
std::unique_ptr<QRhiBuffer> m_vbuf;
std::unique_ptr<QRhiSampler> m_samplerNearest;
std::unique_ptr<QRhiSampler> m_samplerLinear;
std::unique_ptr<QRhiGraphicsPipeline> m_psNoBlend;
std::unique_ptr<QRhiGraphicsPipeline> m_psBlend;
std::unique_ptr<QRhiGraphicsPipeline> m_psPremulBlend;
struct PerQuadData {
QRhiBuffer *ubuf = nullptr;
// All srbs are layout-compatible.
QRhiShaderResourceBindings *srb = nullptr;
QRhiShaderResourceBindings *srbExtra = nullptr; // may be null (used for stereo)
QRhiTexture *lastUsedTexture = nullptr;
QRhiTexture *lastUsedTextureExtra = nullptr; // may be null (used for stereo)
QRhiSampler::Filter lastUsedFilter = QRhiSampler::None;
bool isValid() const { return ubuf && srb; }
void reset() {
delete ubuf;
ubuf = nullptr;
delete srb;
srb = nullptr;
if (srbExtra) {
delete srbExtra;
srbExtra = nullptr;
}
lastUsedTexture = nullptr;
lastUsedTextureExtra = nullptr;
lastUsedFilter = QRhiSampler::None;
}
};
PerQuadData m_widgetQuadData;
QVarLengthArray<PerQuadData, 8> m_textureQuadData;
PerQuadData createPerQuadData(QRhiTexture *texture, QRhiTexture *textureExtra = nullptr);
void updatePerQuadData(PerQuadData *d, QRhiTexture *texture, QRhiTexture *textureExtra = nullptr,
UpdateQuadDataOptions options = {});
void updateUniforms(PerQuadData *d, QRhiResourceUpdateBatch *resourceUpdates,
const QMatrix4x4 &target, const QMatrix3x3 &source,
UpdateUniformOptions options = {});
};
QT_END_NAMESPACE
#endif // QBACKINGSTOREDEFAULTCOMPOSITOR_P_H
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