QQuickShaderEffectNode *QQuickCustomParticle::prepareNextFrame(QQuickShaderEffectNode *rootNode)
{
if (!rootNode)
rootNode = buildCustomNodes();
if (!rootNode)
return 0;
if (m_dirtyProgram) {
const bool isES = QOpenGLContext::currentContext()->isOpenGLES();
QQuickShaderEffectMaterial *material = static_cast<QQuickShaderEffectMaterial *>(rootNode->material());
Q_ASSERT(material);
Key s = m_common.source;
QSGShaderSourceBuilder builder;
if (s.sourceCode[Key::FragmentShader].isEmpty()) {
builder.appendSourceFile(QStringLiteral(":/particles/shaders/customparticle.frag"));
if (isES)
builder.removeVersion();
s.sourceCode[Key::FragmentShader] = builder.source();
builder.clear();
}
builder.appendSourceFile(QStringLiteral(":/particles/shaders/customparticletemplate.vert"));
if (isES)
builder.removeVersion();
if (s.sourceCode[Key::VertexShader].isEmpty())
builder.appendSourceFile(QStringLiteral(":/particles/shaders/customparticle.vert"));
s.sourceCode[Key::VertexShader] = builder.source() + s.sourceCode[Key::VertexShader];
s.className = metaObject()->className();
material->setProgramSource(s);
material->attributes = m_common.attributes;
foreach (QQuickShaderEffectNode* node, m_nodes)
node->markDirty(QSGNode::DirtyMaterial);
m_dirtyProgram = false;
m_dirtyUniforms = true;
}
m_lastTime = m_system->systemSync(this) / 1000.;
if (true) //Currently this is how we update timestamp... potentially over expensive.
buildData(rootNode);
return rootNode;
}
void QSGShaderSourceBuilder::initializeProgramFromFiles(QOpenGLShaderProgram *program,
const QString &vertexShader,
const QString &fragmentShader)
{
Q_ASSERT(program);
program->removeAllShaders();
QSGShaderSourceBuilder builder;
builder.appendSourceFile(vertexShader);
program->addShaderFromSourceCode(QOpenGLShader::Vertex, builder.source());
builder.clear();
builder.appendSourceFile(fragmentShader);
program->addShaderFromSourceCode(QOpenGLShader::Fragment, builder.source());
}