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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 QVIDEOTEXTUREHELPER_H
#define QVIDEOTEXTUREHELPER_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 <qvideoframeformat.h>
#include <rhi/qrhi.h>
#include <QtGui/qtextlayout.h>
QT_BEGIN_NAMESPACE
class QVideoFrame;
class QTextLayout;
class QVideoFrameTextures;
namespace QVideoTextureHelper
{
struct TextureDescription
{
static constexpr int maxPlanes = 3;
struct SizeScale {
int x;
int y;
};
using BytesRequired = int(*)(int stride, int height);
inline int strideForWidth(int width) const { return (width*strideFactor + 15) & ~15; }
inline int bytesForSize(QSize s) const { return bytesRequired(strideForWidth(s.width()), s.height()); }
int widthForPlane(int width, int plane) const
{
if (plane > nplanes) return 0;
return (width + sizeScale[plane].x - 1)/sizeScale[plane].x;
}
int heightForPlane(int height, int plane) const
{
if (plane > nplanes) return 0;
return (height + sizeScale[plane].y - 1)/sizeScale[plane].y;
}
int nplanes;
int strideFactor;
BytesRequired bytesRequired;
QRhiTexture::Format textureFormat[maxPlanes];
SizeScale sizeScale[maxPlanes];
};
Q_MULTIMEDIA_EXPORT const TextureDescription *textureDescription(QVideoFrameFormat::PixelFormat format);
Q_MULTIMEDIA_EXPORT QString vertexShaderFileName(const QVideoFrameFormat &format);
Q_MULTIMEDIA_EXPORT QString fragmentShaderFileName(const QVideoFrameFormat &format, QRhiSwapChain::Format surfaceFormat = QRhiSwapChain::SDR);
Q_MULTIMEDIA_EXPORT void updateUniformData(QByteArray *dst, const QVideoFrameFormat &format, const QVideoFrame &frame,
const QMatrix4x4 &transform, float opacity, float maxNits = 100);
Q_MULTIMEDIA_EXPORT std::unique_ptr<QVideoFrameTextures> createTextures(QVideoFrame &frame, QRhi *rhi, QRhiResourceUpdateBatch *rub, std::unique_ptr<QVideoFrameTextures> &&oldTextures);
struct UniformData {
float transformMatrix[4][4];
float colorMatrix[4][4];
float opacity;
float width;
float masteringWhite;
float maxLum;
};
struct Q_MULTIMEDIA_EXPORT SubtitleLayout
{
QSize videoSize;
QRectF bounds;
QTextLayout layout;
bool update(const QSize &frameSize, QString text);
void draw(QPainter *painter, const QPointF &translate) const;
QImage toImage() const;
};
}
QT_END_NAMESPACE
#endif
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