qquickimageparticle.cpp

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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
 
#include <QtQuick/private/qsgcontext_p.h>
#include <private/qsgadaptationlayer_p.h>
#include <private/qquickitem_p.h>
#include <QtQuick/qsgnode.h>
#include <QtQuick/qsgtexture.h>
#include <QFile>
#include <QRandomGenerator>
#include "qquickimageparticle_p.h"
#include "qquickparticleemitter_p.h"
#include <private/qquicksprite_p.h>
#include <private/qquickspriteengine_p.h>
#include <QSGRendererInterface>
#include <QtQuick/private/qsgplaintexture_p.h>
#include <private/qqmlglobal_p.h>
#include <QtQml/qqmlinfo.h>
#include <QtCore/QtMath>
#include <rhi/qrhi.h>
 
#include <cmath>
 
QT_BEGIN_NAMESPACE
 
// Must match the shader code
#define UNIFORM_ARRAY_SIZE 64
 
class ImageMaterialData
{
    public:
    ImageMaterialData()
        : texture(nullptr), colorTable(nullptr)
    {}
 
    ~ImageMaterialData(){
        delete texture;
        delete colorTable;
    }
 
    QSGTexture *texture;
    QSGTexture *colorTable;
    float sizeTable[UNIFORM_ARRAY_SIZE];
    float opacityTable[UNIFORM_ARRAY_SIZE];
 
    qreal dpr;
    qreal timestamp;
    qreal entry;
    QSizeF animSheetSize;
};
 
class TabledMaterialRhiShader : public QSGMaterialShader
{
public:
    TabledMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_tabled.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_tabled.frag.qsb"));
    }
 
    bool updateUniformData(RenderState &renderState, QSGMaterial *newMaterial, QSGMaterial *) override
    {
        QByteArray *buf = renderState.uniformData();
        Q_ASSERT(buf->size() >= 80 + 2 * (UNIFORM_ARRAY_SIZE * 4 * 4));
 
        if (renderState.isMatrixDirty()) {
            const QMatrix4x4 m = renderState.combinedMatrix();
            memcpy(buf->data(), m.constData(), 64);
        }
 
        if (renderState.isOpacityDirty()) {
            const float opacity = renderState.opacity();
            memcpy(buf->data() + 64, &opacity, 4);
        }
 
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
 
        float entry = float(state->entry);
        memcpy(buf->data() + 68, &entry, 4);
 
        float timestamp = float(state->timestamp);
        memcpy(buf->data() + 72, &timestamp, 4);
 
        float *p = reinterpret_cast<float *>(buf->data() + 80);
        for (int i = 0; i < UNIFORM_ARRAY_SIZE; ++i) {
            *p = state->sizeTable[i];
            p += 4;
        }
        p = reinterpret_cast<float *>(buf->data() + 80 + (UNIFORM_ARRAY_SIZE * 4 * 4));
        for (int i = 0; i < UNIFORM_ARRAY_SIZE; ++i) {
            *p = state->opacityTable[i];
            p += 4;
        }
 
        return true;
    }
 
    void updateSampledImage(RenderState &renderState, int binding, QSGTexture **texture,
                            QSGMaterial *newMaterial, QSGMaterial *) override
    {
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
        if (binding == 2) {
            state->colorTable->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->colorTable;
        } else if (binding == 1) {
            state->texture->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->texture;
        }
    }
};
 
class TabledMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new TabledMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType TabledMaterial::m_type;
 
class DeformableMaterialRhiShader : public QSGMaterialShader
{
public:
    DeformableMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_deformed.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_deformed.frag.qsb"));
    }
 
    bool updateUniformData(RenderState &renderState, QSGMaterial *newMaterial, QSGMaterial *) override
    {
        QByteArray *buf = renderState.uniformData();
        Q_ASSERT(buf->size() >= 80 + 2 * (UNIFORM_ARRAY_SIZE * 4 * 4));
 
        if (renderState.isMatrixDirty()) {
            const QMatrix4x4 m = renderState.combinedMatrix();
            memcpy(buf->data(), m.constData(), 64);
        }
 
        if (renderState.isOpacityDirty()) {
            const float opacity = renderState.opacity();
            memcpy(buf->data() + 64, &opacity, 4);
        }
 
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
 
        float entry = float(state->entry);
        memcpy(buf->data() + 68, &entry, 4);
 
        float timestamp = float(state->timestamp);
        memcpy(buf->data() + 72, &timestamp, 4);
 
        return true;
    }
 
    void updateSampledImage(RenderState &renderState, int binding, QSGTexture **texture,
                            QSGMaterial *newMaterial, QSGMaterial *) override
    {
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
        if (binding == 1) {
            state->texture->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->texture;
        }
    }
};
 
class DeformableMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new DeformableMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType DeformableMaterial::m_type;
 
class ParticleSpriteMaterialRhiShader : public QSGMaterialShader
{
public:
    ParticleSpriteMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_sprite.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_sprite.frag.qsb"));
    }
 
    bool updateUniformData(RenderState &renderState, QSGMaterial *newMaterial, QSGMaterial *) override
    {
        QByteArray *buf = renderState.uniformData();
        Q_ASSERT(buf->size() >= 80 + 2 * (UNIFORM_ARRAY_SIZE * 4 * 4));
 
        if (renderState.isMatrixDirty()) {
            const QMatrix4x4 m = renderState.combinedMatrix();
            memcpy(buf->data(), m.constData(), 64);
        }
 
        if (renderState.isOpacityDirty()) {
            const float opacity = renderState.opacity();
            memcpy(buf->data() + 64, &opacity, 4);
        }
 
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
 
        float entry = float(state->entry);
        memcpy(buf->data() + 68, &entry, 4);
 
        float timestamp = float(state->timestamp);
        memcpy(buf->data() + 72, &timestamp, 4);
 
        float *p = reinterpret_cast<float *>(buf->data() + 80);
        for (int i = 0; i < UNIFORM_ARRAY_SIZE; ++i) {
            *p = state->sizeTable[i];
            p += 4;
        }
        p = reinterpret_cast<float *>(buf->data() + 80 + (UNIFORM_ARRAY_SIZE * 4 * 4));
        for (int i = 0; i < UNIFORM_ARRAY_SIZE; ++i) {
            *p = state->opacityTable[i];
            p += 4;
        }
 
        return true;
    }
 
    void updateSampledImage(RenderState &renderState, int binding, QSGTexture **texture,
                            QSGMaterial *newMaterial, QSGMaterial *) override
    {
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
        if (binding == 2) {
            state->colorTable->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->colorTable;
        } else if (binding == 1) {
            state->texture->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->texture;
        }
    }
};
 
class SpriteMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new ParticleSpriteMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType SpriteMaterial::m_type;
 
class ColoredPointMaterialRhiShader : public QSGMaterialShader
{
public:
    ColoredPointMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_coloredpoint.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_coloredpoint.frag.qsb"));
    }
 
    bool updateUniformData(RenderState &renderState, QSGMaterial *newMaterial, QSGMaterial *) override
    {
        QByteArray *buf = renderState.uniformData();
        Q_ASSERT(buf->size() >= 80 + 2 * (UNIFORM_ARRAY_SIZE * 4 * 4));
 
        if (renderState.isMatrixDirty()) {
            const QMatrix4x4 m = renderState.combinedMatrix();
            memcpy(buf->data(), m.constData(), 64);
        }
 
        if (renderState.isOpacityDirty()) {
            const float opacity = renderState.opacity();
            memcpy(buf->data() + 64, &opacity, 4);
        }
 
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
 
        float entry = float(state->entry);
        memcpy(buf->data() + 68, &entry, 4);
 
        float timestamp = float(state->timestamp);
        memcpy(buf->data() + 72, &timestamp, 4);
 
        float dpr = float(state->dpr);
        memcpy(buf->data() + 76, &dpr, 4);
 
        return true;
    }
 
    void updateSampledImage(RenderState &renderState, int binding, QSGTexture **texture,
                            QSGMaterial *newMaterial, QSGMaterial *) override
    {
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
        if (binding == 1) {
            state->texture->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->texture;
        }
    }
};
 
class ColoredPointMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new ColoredPointMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType ColoredPointMaterial::m_type;
 
class ColoredMaterialRhiShader : public ColoredPointMaterialRhiShader
{
public:
    ColoredMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_colored.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_colored.frag.qsb"));
    }
};
 
class ColoredMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new ColoredMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType ColoredMaterial::m_type;
 
class SimplePointMaterialRhiShader : public QSGMaterialShader
{
public:
    SimplePointMaterialRhiShader()
    {
        setShaderFileName(VertexStage, QStringLiteral(":/particles/shaders_ng/imageparticle_simplepoint.vert.qsb"));
        setShaderFileName(FragmentStage, QStringLiteral(":/particles/shaders_ng/imageparticle_simplepoint.frag.qsb"));
    }
 
    bool updateUniformData(RenderState &renderState, QSGMaterial *newMaterial, QSGMaterial *) override
    {
        QByteArray *buf = renderState.uniformData();
        Q_ASSERT(buf->size() >= 80 + 2 * (UNIFORM_ARRAY_SIZE * 4 * 4));
 
        if (renderState.isMatrixDirty()) {
            const QMatrix4x4 m = renderState.combinedMatrix();
            memcpy(buf->data(), m.constData(), 64);
        }
 
        if (renderState.isOpacityDirty()) {
            const float opacity = renderState.opacity();
            memcpy(buf->data() + 64, &opacity, 4);
        }
 
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
 
        float entry = float(state->entry);
        memcpy(buf->data() + 68, &entry, 4);
 
        float timestamp = float(state->timestamp);
        memcpy(buf->data() + 72, &timestamp, 4);
 
        float dpr = float(state->dpr);
        memcpy(buf->data() + 76, &dpr, 4);
 
        return true;
    }
 
    void updateSampledImage(RenderState &renderState, int binding, QSGTexture **texture,
                            QSGMaterial *newMaterial, QSGMaterial *) override
    {
        ImageMaterialData *state = static_cast<ImageMaterial *>(newMaterial)->state();
        if (binding == 1) {
            state->texture->commitTextureOperations(renderState.rhi(), renderState.resourceUpdateBatch());
            *texture = state->texture;
        }
    }
};
 
class SimplePointMaterial : public ImageMaterial
{
public:
    QSGMaterialShader *createShader(QSGRendererInterface::RenderMode renderMode) const override {
        Q_UNUSED(renderMode);
        return new SimplePointMaterialRhiShader;
    }
    QSGMaterialType *type() const override { return &m_type; }
 
    ImageMaterialData *state() override { return &m_state; }
 
private:
    static QSGMaterialType m_type;
    ImageMaterialData m_state;
};
 
QSGMaterialType SimplePointMaterial::m_type;
 
void fillUniformArrayFromImage(float* array, const QImage& img, int size)
{
    if (img.isNull()){
        for (int i=0; i<size; i++)
            array[i] = 1.0;
        return;
    }
    QImage scaled = img.scaled(size,1);
    for (int i=0; i<size; i++)
        array[i] = qAlpha(scaled.pixel(i,0))/255.0;
}
 
QQuickImageParticle::QQuickImageParticle(QQuickItem* parent)
    : QQuickParticlePainter(parent)
    , m_color_variation(0.0)
    , m_outgoingNode(nullptr)
    , m_material(nullptr)
    , m_alphaVariation(0.0)
    , m_alpha(1.0)
    , m_redVariation(0.0)
    , m_greenVariation(0.0)
    , m_blueVariation(0.0)
    , m_rotation(0)
    , m_rotationVariation(0)
    , m_rotationVelocity(0)
    , m_rotationVelocityVariation(0)
    , m_autoRotation(false)
    , m_xVector(nullptr)
    , m_yVector(nullptr)
    , m_spriteEngine(nullptr)
    , m_spritesInterpolate(true)
    , m_explicitColor(false)
    , m_explicitRotation(false)
    , m_explicitDeformation(false)
    , m_explicitAnimation(false)
    , m_bypassOptimizations(false)
    , perfLevel(Unknown)
    , m_targetPerfLevel(Unknown)
    , m_debugMode(false)
    , m_entryEffect(Fade)
    , m_startedImageLoading(0)
    , m_rhi(nullptr)
    , m_apiChecked(false)
    , m_dpr(1.0)
    , m_previousActive(false)
{
    setFlag(ItemHasContents);
}
 
QQuickImageParticle::~QQuickImageParticle()
{
    clearShadows();
}
 
QQmlListProperty<QQuickSprite> QQuickImageParticle::sprites()
{
    return QQmlListProperty<QQuickSprite>(this, &m_sprites,
                                          spriteAppend, spriteCount, spriteAt,
                                          spriteClear, spriteReplace, spriteRemoveLast);
}
 
void QQuickImageParticle::sceneGraphInvalidated()
{
    m_nodes.clear();
    m_material = nullptr;
    delete m_outgoingNode;
    m_outgoingNode = nullptr;
    m_apiChecked = false;
}
 
void QQuickImageParticle::setImage(const QUrl &image)
{
    if (image.isEmpty()){
        if (m_image) {
            m_image.reset();
            emit imageChanged();
        }
        return;
    }
 
    if (!m_image)
        m_image.reset(new ImageData);
    if (image == m_image->source)
        return;
    m_image->source = image;
    emit imageChanged();
    reset();
}
 
 
void QQuickImageParticle::setColortable(const QUrl &table)
{
    if (table.isEmpty()){
        if (m_colorTable) {
            m_colorTable.reset();
            emit colortableChanged();
        }
        return;
    }
 
    if (!m_colorTable)
        m_colorTable.reset(new ImageData);
    if (table == m_colorTable->source)
        return;
    m_colorTable->source = table;
    emit colortableChanged();
    reset();
}
 
void QQuickImageParticle::setSizetable(const QUrl &table)
{
    if (table.isEmpty()){
        if (m_sizeTable) {
            m_sizeTable.reset();
            emit sizetableChanged();
        }
        return;
    }
 
    if (!m_sizeTable)
        m_sizeTable.reset(new ImageData);
    if (table == m_sizeTable->source)
        return;
    m_sizeTable->source = table;
    emit sizetableChanged();
    reset();
}
 
void QQuickImageParticle::setOpacitytable(const QUrl &table)
{
    if (table.isEmpty()){
        if (m_opacityTable) {
            m_opacityTable.reset();
            emit opacitytableChanged();
        }
        return;
    }
 
    if (!m_opacityTable)
        m_opacityTable.reset(new ImageData);
    if (table == m_opacityTable->source)
        return;
    m_opacityTable->source = table;
    emit opacitytableChanged();
    reset();
}
 
void QQuickImageParticle::setColor(const QColor &color)
{
    if (color == m_color)
        return;
    m_color = color;
    emit colorChanged();
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setColorVariation(qreal var)
{
    if (var == m_color_variation)
        return;
    m_color_variation = var;
    emit colorVariationChanged();
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setAlphaVariation(qreal arg)
{
    if (m_alphaVariation != arg) {
        m_alphaVariation = arg;
        emit alphaVariationChanged(arg);
    }
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setAlpha(qreal arg)
{
    if (m_alpha != arg) {
        m_alpha = arg;
        emit alphaChanged(arg);
    }
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setRedVariation(qreal arg)
{
    if (m_redVariation != arg) {
        m_redVariation = arg;
        emit redVariationChanged(arg);
    }
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setGreenVariation(qreal arg)
{
    if (m_greenVariation != arg) {
        m_greenVariation = arg;
        emit greenVariationChanged(arg);
    }
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setBlueVariation(qreal arg)
{
    if (m_blueVariation != arg) {
        m_blueVariation = arg;
        emit blueVariationChanged(arg);
    }
    m_explicitColor = true;
    checkPerfLevel(ColoredPoint);
}
 
void QQuickImageParticle::setRotation(qreal arg)
{
    if (m_rotation != arg) {
        m_rotation = arg;
        emit rotationChanged(arg);
    }
    m_explicitRotation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setRotationVariation(qreal arg)
{
    if (m_rotationVariation != arg) {
        m_rotationVariation = arg;
        emit rotationVariationChanged(arg);
    }
    m_explicitRotation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setRotationVelocity(qreal arg)
{
    if (m_rotationVelocity != arg) {
        m_rotationVelocity = arg;
        emit rotationVelocityChanged(arg);
    }
    m_explicitRotation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setRotationVelocityVariation(qreal arg)
{
    if (m_rotationVelocityVariation != arg) {
        m_rotationVelocityVariation = arg;
        emit rotationVelocityVariationChanged(arg);
    }
    m_explicitRotation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setAutoRotation(bool arg)
{
    if (m_autoRotation != arg) {
        m_autoRotation = arg;
        emit autoRotationChanged(arg);
    }
    m_explicitRotation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setXVector(QQuickDirection* arg)
{
    if (m_xVector != arg) {
        m_xVector = arg;
        emit xVectorChanged(arg);
    }
    m_explicitDeformation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setYVector(QQuickDirection* arg)
{
    if (m_yVector != arg) {
        m_yVector = arg;
        emit yVectorChanged(arg);
    }
    m_explicitDeformation = true;
    checkPerfLevel(Deformable);
}
 
void QQuickImageParticle::setSpritesInterpolate(bool arg)
{
    if (m_spritesInterpolate != arg) {
        m_spritesInterpolate = arg;
        emit spritesInterpolateChanged(arg);
    }
}
 
void QQuickImageParticle::setBypassOptimizations(bool arg)
{
    if (m_bypassOptimizations != arg) {
        m_bypassOptimizations = arg;
        emit bypassOptimizationsChanged(arg);
    }
    // Applies regardless of perfLevel
    reset();
}
 
void QQuickImageParticle::setEntryEffect(EntryEffect arg)
{
    if (m_entryEffect != arg) {
        m_entryEffect = arg;
        if (m_material)
            getState(m_material)->entry = (qreal) m_entryEffect;
        emit entryEffectChanged(arg);
    }
}
 
void QQuickImageParticle::resetColor()
{
    m_explicitColor = false;
    for (auto groupId : groupIds()) {
        for (QQuickParticleData* d : std::as_const(m_system->groupData[groupId]->data)) {
            if (d->colorOwner == this) {
                d->colorOwner = nullptr;
            }
        }
    }
    m_color = QColor();
    m_color_variation = 0.0f;
    m_redVariation = 0.0f;
    m_blueVariation = 0.0f;
    m_greenVariation = 0.0f;
    m_alpha = 1.0f;
    m_alphaVariation = 0.0f;
}
 
void QQuickImageParticle::resetRotation()
{
    m_explicitRotation = false;
    for (auto groupId : groupIds()) {
        for (QQuickParticleData* d : std::as_const(m_system->groupData[groupId]->data)) {
            if (d->rotationOwner == this) {
                d->rotationOwner = nullptr;
            }
        }
    }
    m_rotation = 0;
    m_rotationVariation = 0;
    m_rotationVelocity = 0;
    m_rotationVelocityVariation = 0;
    m_autoRotation = false;
}
 
void QQuickImageParticle::resetDeformation()
{
    m_explicitDeformation = false;
    for (auto groupId : groupIds()) {
        for (QQuickParticleData* d : std::as_const(m_system->groupData[groupId]->data)) {
            if (d->deformationOwner == this) {
                d->deformationOwner = nullptr;
            }
        }
    }
    if (m_xVector)
        delete m_xVector;
    if (m_yVector)
        delete m_yVector;
    m_xVector = nullptr;
    m_yVector = nullptr;
}
 
void QQuickImageParticle::reset()
{
    QQuickParticlePainter::reset();
    m_pleaseReset = true;
    update();
}
 
 
void QQuickImageParticle::invalidateSceneGraph()
{
    reset();
}
 
void QQuickImageParticle::createEngine()
{
    if (m_spriteEngine)
        delete m_spriteEngine;
    if (m_sprites.size()) {
        m_spriteEngine = new QQuickSpriteEngine(m_sprites, this);
        connect(m_spriteEngine, SIGNAL(stateChanged(int)),
                this, SLOT(spriteAdvance(int)), Qt::DirectConnection);
        m_explicitAnimation = true;
    } else {
        m_spriteEngine = nullptr;
        m_explicitAnimation = false;
    }
    reset();
}
 
static QSGGeometry::Attribute SimplePointParticle_Attributes[] = {
    QSGGeometry::Attribute::create(0, 2, QSGGeometry::FloatType, true),      // Position
    QSGGeometry::Attribute::create(1, 4, QSGGeometry::FloatType),            // Data
    QSGGeometry::Attribute::create(2, 4, QSGGeometry::FloatType)             // Vectors
};
 
static QSGGeometry::AttributeSet SimplePointParticle_AttributeSet =
{
    3, // Attribute Count
    ( 2 + 4 + 4 ) * sizeof(float),
    SimplePointParticle_Attributes
};
 
static QSGGeometry::Attribute ColoredPointParticle_Attributes[] = {
    QSGGeometry::Attribute::create(0, 2, QSGGeometry::FloatType, true),      // Position
    QSGGeometry::Attribute::create(1, 4, QSGGeometry::FloatType),            // Data
    QSGGeometry::Attribute::create(2, 4, QSGGeometry::FloatType),            // Vectors
    QSGGeometry::Attribute::create(3, 4, QSGGeometry::UnsignedByteType),     // Colors
};
 
static QSGGeometry::AttributeSet ColoredPointParticle_AttributeSet =
{
    4, // Attribute Count
    ( 2 + 4 + 4 ) * sizeof(float) + 4 * sizeof(uchar),
    ColoredPointParticle_Attributes
};
 
static QSGGeometry::Attribute ColoredParticle_Attributes[] = {
    QSGGeometry::Attribute::create(0, 2, QSGGeometry::FloatType, true),      // Position
    QSGGeometry::Attribute::create(1, 4, QSGGeometry::FloatType),            // Data
    QSGGeometry::Attribute::create(2, 4, QSGGeometry::FloatType),            // Vectors
    QSGGeometry::Attribute::create(3, 4, QSGGeometry::UnsignedByteType),     // Colors
    QSGGeometry::Attribute::create(4, 4, QSGGeometry::UnsignedByteType),     // TexCoord
};
 
static QSGGeometry::AttributeSet ColoredParticle_AttributeSet =
{
    5, // Attribute Count
    ( 2 + 4 + 4 ) * sizeof(float) + (4 + 4) * sizeof(uchar),
    ColoredParticle_Attributes
};
 
static QSGGeometry::Attribute DeformableParticle_Attributes[] = {
    QSGGeometry::Attribute::create(0, 4, QSGGeometry::FloatType),            // Position & Rotation
    QSGGeometry::Attribute::create(1, 4, QSGGeometry::FloatType),            // Data
    QSGGeometry::Attribute::create(2, 4, QSGGeometry::FloatType),            // Vectors
    QSGGeometry::Attribute::create(3, 4, QSGGeometry::UnsignedByteType),     // Colors
    QSGGeometry::Attribute::create(4, 4, QSGGeometry::FloatType),            // DeformationVectors
    QSGGeometry::Attribute::create(5, 4, QSGGeometry::UnsignedByteType),     // TexCoord & autoRotate
};
 
static QSGGeometry::AttributeSet DeformableParticle_AttributeSet =
{
    6, // Attribute Count
    (4 + 4 + 4 + 4) * sizeof(float) + (4 + 4) * sizeof(uchar),
    DeformableParticle_Attributes
};
 
static QSGGeometry::Attribute SpriteParticle_Attributes[] = {
    QSGGeometry::Attribute::create(0, 4, QSGGeometry::FloatType),            // Position & Rotation
    QSGGeometry::Attribute::create(1, 4, QSGGeometry::FloatType),            // Data
    QSGGeometry::Attribute::create(2, 4, QSGGeometry::FloatType),            // Vectors
    QSGGeometry::Attribute::create(3, 4, QSGGeometry::UnsignedByteType),     // Colors
    QSGGeometry::Attribute::create(4, 4, QSGGeometry::FloatType),            // DeformationVectors
    QSGGeometry::Attribute::create(5, 4, QSGGeometry::UnsignedByteType),     // TexCoord & autoRotate
    QSGGeometry::Attribute::create(6, 3, QSGGeometry::FloatType),            // Anim Data
    QSGGeometry::Attribute::create(7, 3, QSGGeometry::FloatType)             // Anim Pos
};
 
static QSGGeometry::AttributeSet SpriteParticle_AttributeSet =
{
    8, // Attribute Count
    (4 + 4 + 4 + 4 + 3 + 3) * sizeof(float) + (4 + 4) * sizeof(uchar),
    SpriteParticle_Attributes
};
 
void QQuickImageParticle::clearShadows()
{
    foreach (const QVector<QQuickParticleData*> data, m_shadowData)
        qDeleteAll(data);
    m_shadowData.clear();
}
 
//Only call if you need to, may initialize the whole array first time
QQuickParticleData* QQuickImageParticle::getShadowDatum(QQuickParticleData* datum)
{
    //Will return datum if the datum is a sentinel or uninitialized, to centralize that one check
    if (datum->systemIndex == -1)
        return datum;
    if (!m_shadowData.contains(datum->groupId)) {
        QQuickParticleGroupData* gd = m_system->groupData[datum->groupId];
        QVector<QQuickParticleData*> data;
        const int gdSize = gd->size();
        data.reserve(gdSize);
        for (int i = 0; i < gdSize; i++) {
            QQuickParticleData* datum = new QQuickParticleData;
            *datum = *(gd->data[i]);
            data << datum;
        }
        m_shadowData.insert(datum->groupId, data);
    }
    //### If dynamic resize is added, remember to potentially resize the shadow data on out-of-bounds access request
 
    return m_shadowData[datum->groupId][datum->index];
}
 
void QQuickImageParticle::checkPerfLevel(PerformanceLevel level)
{
    if (m_targetPerfLevel < level) {
        m_targetPerfLevel = level;
        reset();
    }
}
 
bool QQuickImageParticle::loadingSomething()
{
    return (m_image && m_image->pix.isLoading())
        || (m_colorTable && m_colorTable->pix.isLoading())
        || (m_sizeTable && m_sizeTable->pix.isLoading())
        || (m_opacityTable && m_opacityTable->pix.isLoading())
        || (m_spriteEngine && m_spriteEngine->isLoading());
}
 
void QQuickImageParticle::mainThreadFetchImageData()
{
    const QQmlContext *context = nullptr;
    QQmlEngine *engine = nullptr;
    const auto loadPix = [&](ImageData *image) {
        if (!engine) {
            context = qmlContext(this);
            engine = context->engine();
        }
        image->pix.load(engine, context->resolvedUrl(image->source));
    };
 
 
    if (m_image) {//ImageData created on setSource
        m_image->pix.clear(this);
        loadPix(m_image.get());
    }
 
    if (m_spriteEngine)
        m_spriteEngine->startAssemblingImage();
 
    if (m_colorTable)
        loadPix(m_colorTable.get());
 
    if (m_sizeTable)
        loadPix(m_sizeTable.get());
 
    if (m_opacityTable)
        loadPix(m_opacityTable.get());
 
    m_startedImageLoading = 2;
}
 
void QQuickImageParticle::buildParticleNodes(QSGNode** passThrough)
{
    // Starts async parts, like loading images, on gui thread
    // Not on individual properties, because we delay until system is running
    if (*passThrough || loadingSomething())
        return;
 
    if (m_startedImageLoading == 0) {
        m_startedImageLoading = 1;
        //stage 1 is in gui thread
        QQuickImageParticle::staticMetaObject.invokeMethod(this, "mainThreadFetchImageData", Qt::QueuedConnection);
    } else if (m_startedImageLoading == 2) {
        finishBuildParticleNodes(passThrough); //rest happens in render thread
    }
 
    //No mutex, because it's slow and a compare that fails due to a race condition means just a dropped frame
}
 
void QQuickImageParticle::finishBuildParticleNodes(QSGNode** node)
{
    if (!m_rhi)
        return;
 
    if (m_count * 4 > 0xffff) {
        // Index data is ushort.
        qmlInfo(this) << "ImageParticle: Too many particles - maximum 16383 per ImageParticle";
        return;
    }
 
    if (m_count <= 0)
        return;
 
    m_debugMode = m_system->m_debugMode;
 
    if (m_sprites.size() || m_bypassOptimizations) {
        perfLevel = Sprites;
    } else if (m_colorTable || m_sizeTable || m_opacityTable) {
        perfLevel = Tabled;
    } else if (m_autoRotation || m_rotation || m_rotationVariation
               || m_rotationVelocity || m_rotationVelocityVariation
               || m_xVector || m_yVector) {
        perfLevel = Deformable;
    } else if (m_alphaVariation || m_alpha != 1.0 || m_color.isValid() || m_color_variation
               || m_redVariation || m_blueVariation || m_greenVariation) {
        perfLevel = ColoredPoint;
    } else {
        perfLevel = SimplePoint;
    }
 
    for (auto groupId : groupIds()) {
        //For sharing higher levels, need to have highest used so it renders
        for (QQuickParticlePainter* p : std::as_const(m_system->groupData[groupId]->painters)) {
            QQuickImageParticle* other = qobject_cast<QQuickImageParticle*>(p);
            if (other){
                if (other->perfLevel > perfLevel) {
                    if (other->perfLevel >= Tabled){//Deformable is the highest level needed for this, anything higher isn't shared (or requires your own sprite)
                        if (perfLevel < Deformable)
                            perfLevel = Deformable;
                    } else {
                        perfLevel = other->perfLevel;
                    }
                } else if (other->perfLevel < perfLevel) {
                    other->reset();
                }
            }
        }
    }
 
    // Points with a size other than 1 are an optional feature with QRhi
    // because some of the underlying APIs have no support for this.
    // Therefore, avoid the point sprite path with APIs like Direct3D.
    if (perfLevel < Colored && !m_rhi->isFeatureSupported(QRhi::VertexShaderPointSize))
        perfLevel = Colored;
 
    if (perfLevel >= ColoredPoint  && !m_color.isValid())
        m_color = QColor(Qt::white);//Hidden default, but different from unset
 
    m_targetPerfLevel = perfLevel;
 
    clearShadows();
    if (m_material)
        m_material = nullptr;
 
    //Setup material
    QImage colortable;
    QImage sizetable;
    QImage opacitytable;
    QImage image;
    bool imageLoaded = false;
    switch (perfLevel) {//Fallthrough intended
    case Sprites:
    {
        if (!m_spriteEngine) {
            qWarning() << "ImageParticle: No sprite engine...";
            //Sprite performance mode with static image is supported, but not advised
            //Note that in this case it always uses shadow data
        } else {
            image = m_spriteEngine->assembledImage();
            if (image.isNull())//Warning is printed in engine
                return;
            imageLoaded = true;
        }
        m_material = new SpriteMaterial;
        ImageMaterialData *state = getState(m_material);
        if (imageLoaded)
            state->texture = QSGPlainTexture::fromImage(image);
        state->animSheetSize = QSizeF(image.size() / image.devicePixelRatio());
        if (m_spriteEngine)
            m_spriteEngine->setCount(m_count);
    }
        Q_FALLTHROUGH();
    case Tabled:
    {
        if (!m_material)
            m_material = new TabledMaterial;
 
        if (m_colorTable) {
            if (m_colorTable->pix.isReady())
                colortable = m_colorTable->pix.image();
            else
                qmlWarning(this) << "Error loading color table: " << m_colorTable->pix.error();
        }
 
        if (m_sizeTable) {
            if (m_sizeTable->pix.isReady())
                sizetable = m_sizeTable->pix.image();
            else
                qmlWarning(this) << "Error loading size table: " << m_sizeTable->pix.error();
        }
 
        if (m_opacityTable) {
            if (m_opacityTable->pix.isReady())
                opacitytable = m_opacityTable->pix.image();
            else
                qmlWarning(this) << "Error loading opacity table: " << m_opacityTable->pix.error();
        }
 
        if (colortable.isNull()){//###Goes through image just for this
            colortable = QImage(1,1,QImage::Format_ARGB32_Premultiplied);
            colortable.fill(Qt::white);
        }
        ImageMaterialData *state = getState(m_material);
        state->colorTable = QSGPlainTexture::fromImage(colortable);
        fillUniformArrayFromImage(state->sizeTable, sizetable, UNIFORM_ARRAY_SIZE);
        fillUniformArrayFromImage(state->opacityTable, opacitytable, UNIFORM_ARRAY_SIZE);
    }
        Q_FALLTHROUGH();
    case Deformable:
    {
        if (!m_material)
            m_material = new DeformableMaterial;
    }
        Q_FALLTHROUGH();
    case Colored:
    {
        if (!m_material)
            m_material = new ColoredMaterial;
    }
        Q_FALLTHROUGH();
    case ColoredPoint:
    {
        if (!m_material)
            m_material = new ColoredPointMaterial;
    }
        Q_FALLTHROUGH();
    default://Also Simple
    {
        if (!m_material)
            m_material = new SimplePointMaterial;
        ImageMaterialData *state = getState(m_material);
        if (!imageLoaded) {
            if (!m_image || !m_image->pix.isReady()) {
                if (m_image)
                    qmlWarning(this) << m_image->pix.error();
                delete m_material;
                return;
            }
            //state->texture //TODO: Shouldn't this be better? But not crash?
            //    = QQuickItemPrivate::get(this)->sceneGraphContext()->textureForFactory(m_imagePix.textureFactory());
            state->texture = QSGPlainTexture::fromImage(m_image->pix.image());
        }
        state->texture->setFiltering(QSGTexture::Linear);
        state->entry = (qreal) m_entryEffect;
        state->dpr = m_dpr;
 
        m_material->setFlag(QSGMaterial::Blending | QSGMaterial::RequiresFullMatrix);
    }
    }
 
    m_nodes.clear();
    for (auto groupId : groupIds()) {
        int count = m_system->groupData[groupId]->size();
        QSGGeometryNode* node = new QSGGeometryNode();
        node->setMaterial(m_material);
        node->markDirty(QSGNode::DirtyMaterial);
 
        m_nodes.insert(groupId, node);
        m_idxStarts.insert(groupId, m_lastIdxStart);
        m_startsIdx.append(qMakePair(m_lastIdxStart, groupId));
        m_lastIdxStart += count;
 
        //Create Particle Geometry
        int vCount = count * 4;
        int iCount = count * 6;
 
        QSGGeometry *g;
        if (perfLevel == Sprites)
            g = new QSGGeometry(SpriteParticle_AttributeSet, vCount, iCount);
        else if (perfLevel == Tabled)
            g = new QSGGeometry(DeformableParticle_AttributeSet, vCount, iCount);
        else if (perfLevel == Deformable)
            g = new QSGGeometry(DeformableParticle_AttributeSet, vCount, iCount);
        else if (perfLevel == Colored)
            g = new QSGGeometry(ColoredParticle_AttributeSet, vCount, iCount);
        else if (perfLevel == ColoredPoint)
            g = new QSGGeometry(ColoredPointParticle_AttributeSet, count, 0);
        else //Simple
            g = new QSGGeometry(SimplePointParticle_AttributeSet, count, 0);
 
        node->setFlag(QSGNode::OwnsGeometry);
        node->setGeometry(g);
        if (perfLevel <= ColoredPoint){
            g->setDrawingMode(QSGGeometry::DrawPoints);
            if (m_debugMode)
                qDebug("Using point sprites");
        } else {
            g->setDrawingMode(QSGGeometry::DrawTriangles);
        }
 
        for (int p=0; p < count; ++p)
            commit(groupId, p);//commit sets geometry for the node, has its own perfLevel switch
 
        if (perfLevel == Sprites)
            initTexCoords<SpriteVertex>((SpriteVertex*)g->vertexData(), vCount);
        else if (perfLevel == Tabled)
            initTexCoords<DeformableVertex>((DeformableVertex*)g->vertexData(), vCount);
        else if (perfLevel == Deformable)
            initTexCoords<DeformableVertex>((DeformableVertex*)g->vertexData(), vCount);
        else if (perfLevel == Colored)
            initTexCoords<ColoredVertex>((ColoredVertex*)g->vertexData(), vCount);
 
        if (perfLevel > ColoredPoint){
            quint16 *indices = g->indexDataAsUShort();
            for (int i=0; i < count; ++i) {
                int o = i * 4;
                indices[0] = o;
                indices[1] = o + 1;
                indices[2] = o + 2;
                indices[3] = o + 1;
                indices[4] = o + 3;
                indices[5] = o + 2;
                indices += 6;
            }
        }
    }
 
    if (perfLevel == Sprites)
        spritesUpdate();//Gives all vertexes the initial sprite data, then maintained per frame
 
    foreach (QSGGeometryNode* node, m_nodes){
        if (node == *(m_nodes.begin()))
            node->setFlag(QSGGeometryNode::OwnsMaterial);//Root node owns the material for memory management purposes
        else
            (*(m_nodes.begin()))->appendChildNode(node);
    }
 
    *node = *(m_nodes.begin());
    update();
}
 
QSGNode *QQuickImageParticle::updatePaintNode(QSGNode *node, UpdatePaintNodeData *)
{
    if (!m_apiChecked || m_windowChanged) {
        m_apiChecked = true;
        m_windowChanged = false;
 
        QSGRenderContext *rc = QQuickItemPrivate::get(this)->sceneGraphRenderContext();
        QSGRendererInterface *rif = rc->sceneGraphContext()->rendererInterface(rc);
        if (!rif)
            return nullptr;
 
        QSGRendererInterface::GraphicsApi api = rif->graphicsApi();
        const bool isRhi = QSGRendererInterface::isApiRhiBased(api);
 
        if (!node && !isRhi)
            return nullptr;
 
        if (isRhi)
            m_rhi = static_cast<QRhi *>(rif->getResource(m_window, QSGRendererInterface::RhiResource));
        else
            m_rhi = nullptr;
 
        if (isRhi && !m_rhi) {
            qWarning("Failed to query QRhi, particles disabled");
            return nullptr;
        }
        // Get the pixel ratio of the window, used for pointsize scaling
        m_dpr = m_window ? m_window->devicePixelRatio() : 1.0;
    }
 
    if (m_pleaseReset){
        // Cannot just destroy the node and then return null (in case image
        // loading is still in progress). Rather, keep track of the old node
        // until we have a new one.
        delete m_outgoingNode;
        m_outgoingNode = node;
        node = nullptr;
 
        m_nodes.clear();
 
        m_idxStarts.clear();
        m_startsIdx.clear();
        m_lastIdxStart = 0;
 
        m_material = nullptr;
 
        m_pleaseReset = false;
        m_startedImageLoading = 0;//Cancel a part-way build (may still have a pending load)
    } else if (!m_material) {
        delete node;
        node = nullptr;
    }
 
    if (m_system && m_system->isRunning() && !m_system->isPaused()){
        bool dirty = prepareNextFrame(&node);
        if (node) {
            update();
            if (dirty) {
                foreach (QSGGeometryNode* n, m_nodes)
                    n->markDirty(QSGNode::DirtyGeometry);
            }
        } else if (m_startedImageLoading < 2) {
            update();//To call prepareNextFrame() again from the renderThread
        }
    }
 
    if (!node) {
        node = m_outgoingNode;
        m_outgoingNode = nullptr;
    }
 
    return node;
}
 
bool QQuickImageParticle::prepareNextFrame(QSGNode **node)
{
    if (*node == nullptr){//TODO: Staggered loading (as emitted)
        buildParticleNodes(node);
        if (m_debugMode) {
            qDebug() << "QQuickImageParticle Feature level: " << perfLevel;
            qDebug() << "QQuickImageParticle Nodes: ";
            int count = 0;
            for (auto it = m_nodes.keyBegin(), end = m_nodes.keyEnd(); it != end; ++it) {
                qDebug() << "Group " << *it << " (" << m_system->groupData[*it]->size()
                         << " particles)";
                count += m_system->groupData[*it]->size();
            }
            qDebug() << "Total count: " << count;
        }
        if (*node == nullptr)
            return false;
    }
    qint64 timeStamp = m_system->systemSync(this);
 
    qreal time = timeStamp / 1000.;
 
    switch (perfLevel){//Fall-through intended
    case Sprites:
        //Advance State
        if (m_spriteEngine)
            m_spriteEngine->updateSprites(timeStamp);//fires signals if anim changed
        spritesUpdate(time);
        Q_FALLTHROUGH();
    case Tabled:
    case Deformable:
    case Colored:
    case ColoredPoint:
    case SimplePoint:
    default: //Also Simple
        getState(m_material)->timestamp = time;
        break;
    }
 
    bool active = false;
    for (auto groupId : groupIds()) {
        if (m_system->groupData[groupId]->isActive()) {
            active = true;
            break;
        }
    }
 
    const bool dirty = active || m_previousActive;
    if (dirty) {
        foreach (QSGGeometryNode* node, m_nodes)
            node->markDirty(QSGNode::DirtyMaterial);
    }
 
    m_previousActive = active;
    return dirty;
}
 
void QQuickImageParticle::spritesUpdate(qreal time)
{
    ImageMaterialData *state = getState(m_material);
    // Sprite progression handled CPU side, so as to have per-frame control.
    for (auto groupId : groupIds()) {
        for (QQuickParticleData* mainDatum : std::as_const(m_system->groupData[groupId]->data)) {
            QSGGeometryNode *node = m_nodes[groupId];
            if (!node)
                continue;
            //TODO: Interpolate between two different animations if it's going to transition next frame
            //      This is particularly important for cut-up sprites.
            QQuickParticleData* datum = (mainDatum->animationOwner == this ? mainDatum : getShadowDatum(mainDatum));
            int spriteIdx = 0;
            for (int i = 0; i<m_startsIdx.size(); i++) {
                if (m_startsIdx[i].second == groupId){
                    spriteIdx = m_startsIdx[i].first + datum->index;
                    break;
                }
            }
 
            double frameAt;
            qreal progress = 0;
 
            if (datum->frameDuration > 0) {
                qreal frame = (time - datum->animT)/(datum->frameDuration / 1000.0);
                frame = qBound((qreal)0.0, frame, (qreal)((qreal)datum->frameCount - 1.0));//Stop at count-1 frames until we have between anim interpolation
                if (m_spritesInterpolate)
                    progress = std::modf(frame,&frameAt);
                else
                    std::modf(frame,&frameAt);
            } else {
                datum->frameAt++;
                if (datum->frameAt >= datum->frameCount){
                    datum->frameAt = 0;
                    m_spriteEngine->advance(spriteIdx);
                }
                frameAt = datum->frameAt;
            }
            if (m_spriteEngine->sprite(spriteIdx)->reverse())//### Store this in datum too?
                frameAt = (datum->frameCount - 1) - frameAt;
            QSizeF sheetSize = state->animSheetSize;
            qreal y = datum->animY / sheetSize.height();
            qreal w = datum->animWidth / sheetSize.width();
            qreal h = datum->animHeight / sheetSize.height();
            qreal x1 = datum->animX / sheetSize.width();
            x1 += frameAt * w;
            qreal x2 = x1;
            if (frameAt < (datum->frameCount-1))
                x2 += w;
 
            SpriteVertex *spriteVertices = (SpriteVertex *) node->geometry()->vertexData();
            spriteVertices += datum->index*4;
            for (int i=0; i<4; i++) {
                spriteVertices[i].animX1 = x1;
                spriteVertices[i].animY1 = y;
                spriteVertices[i].animX2 = x2;
                spriteVertices[i].animW = w;
                spriteVertices[i].animH = h;
                spriteVertices[i].animProgress = progress;
            }
        }
    }
}
 
void QQuickImageParticle::spriteAdvance(int spriteIdx)
{
    if (!m_startsIdx.size())//Probably overly defensive
        return;
 
    int gIdx = -1;
    int i;
    for (i = 0; i<m_startsIdx.size(); i++) {
        if (spriteIdx < m_startsIdx[i].first) {
            gIdx = m_startsIdx[i-1].second;
            break;
        }
    }
    if (gIdx == -1)
        gIdx = m_startsIdx[i-1].second;
    int pIdx = spriteIdx - m_startsIdx[i-1].first;
 
    QQuickParticleData* mainDatum = m_system->groupData[gIdx]->data[pIdx];
    QQuickParticleData* datum = (mainDatum->animationOwner == this ? mainDatum : getShadowDatum(mainDatum));
 
    datum->animIdx = m_spriteEngine->spriteState(spriteIdx);
    datum->animT = m_spriteEngine->spriteStart(spriteIdx)/1000.0;
    datum->frameCount = m_spriteEngine->spriteFrames(spriteIdx);
    datum->frameDuration = m_spriteEngine->spriteDuration(spriteIdx) / datum->frameCount;
    datum->animX = m_spriteEngine->spriteX(spriteIdx);
    datum->animY = m_spriteEngine->spriteY(spriteIdx);
    datum->animWidth = m_spriteEngine->spriteWidth(spriteIdx);
    datum->animHeight = m_spriteEngine->spriteHeight(spriteIdx);
}
 
void QQuickImageParticle::initialize(int gIdx, int pIdx)
{
    Color4ub color;
    QQuickParticleData* datum = m_system->groupData[gIdx]->data[pIdx];
    qreal redVariation = m_color_variation + m_redVariation;
    qreal greenVariation = m_color_variation + m_greenVariation;
    qreal blueVariation = m_color_variation + m_blueVariation;
    int spriteIdx = 0;
    if (m_spriteEngine) {
        spriteIdx = m_idxStarts[gIdx] + datum->index;
        if (spriteIdx >= m_spriteEngine->count())
            m_spriteEngine->setCount(spriteIdx+1);
    }
 
    float rotation;
    float rotationVelocity;
    uchar autoRotate;
    switch (perfLevel){//Fall-through is intended on all of them
        case Sprites:
            // Initial Sprite State
            if (m_explicitAnimation && m_spriteEngine){
                if (!datum->animationOwner)
                    datum->animationOwner = this;
                QQuickParticleData* writeTo = (datum->animationOwner == this ? datum : getShadowDatum(datum));
                writeTo->animT = writeTo->t;
                //writeTo->animInterpolate = m_spritesInterpolate;
                if (m_spriteEngine){
                    m_spriteEngine->start(spriteIdx);
                    writeTo->frameCount = m_spriteEngine->spriteFrames(spriteIdx);
                    writeTo->frameDuration = m_spriteEngine->spriteDuration(spriteIdx) / writeTo->frameCount;
                    writeTo->animIdx = 0;//Always starts at 0
                    writeTo->frameAt = -1;
                    writeTo->animX = m_spriteEngine->spriteX(spriteIdx);
                    writeTo->animY = m_spriteEngine->spriteY(spriteIdx);
                    writeTo->animWidth = m_spriteEngine->spriteWidth(spriteIdx);
                    writeTo->animHeight = m_spriteEngine->spriteHeight(spriteIdx);
                }
            } else {
                ImageMaterialData *state = getState(m_material);
                QQuickParticleData* writeTo = getShadowDatum(datum);
                writeTo->animT = datum->t;
                writeTo->frameCount = 1;
                writeTo->frameDuration = 60000000.0;
                writeTo->frameAt = -1;
                writeTo->animIdx = 0;
                writeTo->animT = 0;
                writeTo->animX = writeTo->animY = 0;
                writeTo->animWidth = state->animSheetSize.width();
                writeTo->animHeight = state->animSheetSize.height();
            }
            Q_FALLTHROUGH();
        case Tabled:
        case Deformable:
            //Initial Rotation
            if (m_explicitDeformation){
                if (!datum->deformationOwner)
                    datum->deformationOwner = this;
                if (m_xVector){
                    const QPointF &ret = m_xVector->sample(QPointF(datum->x, datum->y));
                    if (datum->deformationOwner == this) {
                        datum->xx = ret.x();
                        datum->xy = ret.y();
                    } else {
                        QQuickParticleData* shadow = getShadowDatum(datum);
                        shadow->xx = ret.x();
                        shadow->xy = ret.y();
                    }
                }
                if (m_yVector){
                    const QPointF &ret = m_yVector->sample(QPointF(datum->x, datum->y));
                    if (datum->deformationOwner == this) {
                        datum->yx = ret.x();
                        datum->yy = ret.y();
                    } else {
                        QQuickParticleData* shadow = getShadowDatum(datum);
                        shadow->yx = ret.x();
                        shadow->yy = ret.y();
                    }
                }
            }
 
            if (m_explicitRotation){
                if (!datum->rotationOwner)
                    datum->rotationOwner = this;
                rotation = qDegreesToRadians(
                    m_rotation + (m_rotationVariation
                                  - 2 * QRandomGenerator::global()->bounded(m_rotationVariation)));
                rotationVelocity = qDegreesToRadians(
                    m_rotationVelocity
                    + (m_rotationVelocityVariation
                       - 2 * QRandomGenerator::global()->bounded(m_rotationVelocityVariation)));
                autoRotate = m_autoRotation ? 1 : 0;
                if (datum->rotationOwner == this) {
                    datum->rotation = rotation;
                    datum->rotationVelocity = rotationVelocity;
                    datum->autoRotate = autoRotate;
                } else {
                    QQuickParticleData* shadow = getShadowDatum(datum);
                    shadow->rotation = rotation;
                    shadow->rotationVelocity = rotationVelocity;
                    shadow->autoRotate = autoRotate;
                }
            }
            Q_FALLTHROUGH();
        case Colored:
            Q_FALLTHROUGH();
        case ColoredPoint:
            //Color initialization
            // Particle color
            if (m_explicitColor) {
                if (!datum->colorOwner)
                    datum->colorOwner = this;
                const auto rgbColor = m_color.toRgb();
                color.r = rgbColor.red() * (1 - redVariation) + QRandomGenerator::global()->bounded(256) * redVariation;
                color.g = rgbColor.green() * (1 - greenVariation) + QRandomGenerator::global()->bounded(256) * greenVariation;
                color.b = rgbColor.blue() * (1 - blueVariation) + QRandomGenerator::global()->bounded(256) * blueVariation;
                color.a = m_alpha * rgbColor.alpha() * (1 - m_alphaVariation) + QRandomGenerator::global()->bounded(256) * m_alphaVariation;
                if (datum->colorOwner == this)
                    datum->color = color;
                else
                    getShadowDatum(datum)->color = color;
            }
        default:
            break;
    }
}
 
void QQuickImageParticle::commit(int gIdx, int pIdx)
{
    if (m_pleaseReset)
        return;
    QSGGeometryNode *node = m_nodes[gIdx];
    if (!node)
        return;
    QQuickParticleData* datum = m_system->groupData[gIdx]->data[pIdx];
    SpriteVertex *spriteVertices = (SpriteVertex *) node->geometry()->vertexData();
    DeformableVertex *deformableVertices = (DeformableVertex *) node->geometry()->vertexData();
    ColoredVertex *coloredVertices = (ColoredVertex *) node->geometry()->vertexData();
    ColoredPointVertex *coloredPointVertices = (ColoredPointVertex *) node->geometry()->vertexData();
    SimplePointVertex *simplePointVertices = (SimplePointVertex *) node->geometry()->vertexData();
    switch (perfLevel){//No automatic fall through intended on this one
    case Sprites:
        spriteVertices += pIdx*4;
        for (int i=0; i<4; i++){
            spriteVertices[i].x = datum->x  - m_systemOffset.x();
            spriteVertices[i].y = datum->y  - m_systemOffset.y();
            spriteVertices[i].t = datum->t;
            spriteVertices[i].lifeSpan = datum->lifeSpan;
            spriteVertices[i].size = datum->size;
            spriteVertices[i].endSize = datum->endSize;
            spriteVertices[i].vx = datum->vx;
            spriteVertices[i].vy = datum->vy;
            spriteVertices[i].ax = datum->ax;
            spriteVertices[i].ay = datum->ay;
            if (m_explicitDeformation && datum->deformationOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                spriteVertices[i].xx = shadow->xx;
                spriteVertices[i].xy = shadow->xy;
                spriteVertices[i].yx = shadow->yx;
                spriteVertices[i].yy = shadow->yy;
            } else {
                spriteVertices[i].xx = datum->xx;
                spriteVertices[i].xy = datum->xy;
                spriteVertices[i].yx = datum->yx;
                spriteVertices[i].yy = datum->yy;
            }
            if (m_explicitRotation && datum->rotationOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                spriteVertices[i].rotation = shadow->rotation;
                spriteVertices[i].rotationVelocity = shadow->rotationVelocity;
                spriteVertices[i].autoRotate = shadow->autoRotate;
            } else {
                spriteVertices[i].rotation = datum->rotation;
                spriteVertices[i].rotationVelocity = datum->rotationVelocity;
                spriteVertices[i].autoRotate = datum->autoRotate;
            }
            //Sprite-related vertices updated per-frame in spritesUpdate(), not on demand
            if (m_explicitColor && datum->colorOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                spriteVertices[i].color = shadow->color;
            } else {
                spriteVertices[i].color = datum->color;
            }
        }
        break;
    case Tabled: //Fall through until it has its own vertex class
    case Deformable:
        deformableVertices += pIdx*4;
        for (int i=0; i<4; i++){
            deformableVertices[i].x = datum->x  - m_systemOffset.x();
            deformableVertices[i].y = datum->y  - m_systemOffset.y();
            deformableVertices[i].t = datum->t;
            deformableVertices[i].lifeSpan = datum->lifeSpan;
            deformableVertices[i].size = datum->size;
            deformableVertices[i].endSize = datum->endSize;
            deformableVertices[i].vx = datum->vx;
            deformableVertices[i].vy = datum->vy;
            deformableVertices[i].ax = datum->ax;
            deformableVertices[i].ay = datum->ay;
            if (m_explicitDeformation && datum->deformationOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                deformableVertices[i].xx = shadow->xx;
                deformableVertices[i].xy = shadow->xy;
                deformableVertices[i].yx = shadow->yx;
                deformableVertices[i].yy = shadow->yy;
            } else {
                deformableVertices[i].xx = datum->xx;
                deformableVertices[i].xy = datum->xy;
                deformableVertices[i].yx = datum->yx;
                deformableVertices[i].yy = datum->yy;
            }
            if (m_explicitRotation && datum->rotationOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                deformableVertices[i].rotation = shadow->rotation;
                deformableVertices[i].rotationVelocity = shadow->rotationVelocity;
                deformableVertices[i].autoRotate = shadow->autoRotate;
            } else {
                deformableVertices[i].rotation = datum->rotation;
                deformableVertices[i].rotationVelocity = datum->rotationVelocity;
                deformableVertices[i].autoRotate = datum->autoRotate;
            }
            if (m_explicitColor && datum->colorOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                deformableVertices[i].color = shadow->color;
            } else {
                deformableVertices[i].color = datum->color;
            }
        }
        break;
    case Colored:
        coloredVertices += pIdx*4;
        for (int i=0; i<4; i++){
            coloredVertices[i].x = datum->x  - m_systemOffset.x();
            coloredVertices[i].y = datum->y  - m_systemOffset.y();
            coloredVertices[i].t = datum->t;
            coloredVertices[i].lifeSpan = datum->lifeSpan;
            coloredVertices[i].size = datum->size;
            coloredVertices[i].endSize = datum->endSize;
            coloredVertices[i].vx = datum->vx;
            coloredVertices[i].vy = datum->vy;
            coloredVertices[i].ax = datum->ax;
            coloredVertices[i].ay = datum->ay;
            if (m_explicitColor && datum->colorOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                coloredVertices[i].color = shadow->color;
            } else {
                coloredVertices[i].color = datum->color;
            }
        }
        break;
    case ColoredPoint:
        coloredPointVertices += pIdx*1;
        for (int i=0; i<1; i++){
            coloredPointVertices[i].x = datum->x  - m_systemOffset.x();
            coloredPointVertices[i].y = datum->y  - m_systemOffset.y();
            coloredPointVertices[i].t = datum->t;
            coloredPointVertices[i].lifeSpan = datum->lifeSpan;
            coloredPointVertices[i].size = datum->size;
            coloredPointVertices[i].endSize = datum->endSize;
            coloredPointVertices[i].vx = datum->vx;
            coloredPointVertices[i].vy = datum->vy;
            coloredPointVertices[i].ax = datum->ax;
            coloredPointVertices[i].ay = datum->ay;
            if (m_explicitColor && datum->colorOwner != this) {
                QQuickParticleData* shadow = getShadowDatum(datum);
                coloredPointVertices[i].color = shadow->color;
            } else {
                coloredPointVertices[i].color = datum->color;
            }
        }
        break;
    case SimplePoint:
        simplePointVertices += pIdx*1;
        for (int i=0; i<1; i++){
            simplePointVertices[i].x = datum->x - m_systemOffset.x();
            simplePointVertices[i].y = datum->y - m_systemOffset.y();
            simplePointVertices[i].t = datum->t;
            simplePointVertices[i].lifeSpan = datum->lifeSpan;
            simplePointVertices[i].size = datum->size;
            simplePointVertices[i].endSize = datum->endSize;
            simplePointVertices[i].vx = datum->vx;
            simplePointVertices[i].vy = datum->vy;
            simplePointVertices[i].ax = datum->ax;
            simplePointVertices[i].ay = datum->ay;
        }
        break;
    default:
        break;
    }
}
 
 
 
QT_END_NAMESPACE
 
#include "moc_qquickimageparticle_p.cpp"