void SSGTexture::bind()
{
QOpenGLContext *context = QOpenGLContext::currentContext();
QOpenGLFunctions *funcs = context->functions();
if (!m_dirty_texture) {
funcs->glBindTexture(GL_TEXTURE_2D, m_texture_id);
if ((minMipmapFiltering() != SSGTexture::None || magMipmapFiltering() != SSGTexture::None) && !m_mipmaps_generated) {
funcs->glGenerateMipmap(GL_TEXTURE_2D);
m_mipmaps_generated = true;
}
updateBindOptions(m_dirty_bind_options);
m_dirty_bind_options = false;
return;
}
m_dirty_texture = false;
if (!m_image || !m_image->isValid()) {
if (m_texture_id && m_owns_texture) {
funcs->glDeleteTextures(1, &m_texture_id);
}
m_texture_id = 0;
m_texture_size = QSize();
m_has_alpha = false;
return;
}
if (m_texture_id == 0)
funcs->glGenTextures(1, &m_texture_id);
funcs->glBindTexture(GL_TEXTURE_2D, m_texture_id);
updateBindOptions(m_dirty_bind_options);
funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, m_texture_size.width(), m_texture_size.height(), 0, GL_RGBA, GL_UNSIGNED_SHORT, m_image->rawData().get());
if (minMipmapFiltering() != SSGTexture::None || magMipmapFiltering() != SSGTexture::None) {
funcs->glGenerateMipmap(GL_TEXTURE_2D);
m_mipmaps_generated = true;
}
m_texture_rect = QRectF(0, 0, 1, 1);
m_dirty_bind_options = false;
// if (!m_retain_image)
// m_image.reset();
}
void SSGQuickLayer::grab()
{
if (!m_item || m_size.isNull()) {
delete m_fbo;
delete m_secondaryFbo;
m_fbo = m_secondaryFbo = 0;
m_depthStencilBuffer.clear();
m_dirtyTexture = false;
return;
}
QSGNode *root = m_item;
while (root->firstChild() && root->type() != QSGNode::RootNodeType)
root = root->firstChild();
if (root->type() != QSGNode::RootNodeType)
return;
if (!m_renderer) {
m_renderer = m_context->createRenderer();
connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture()));
}
m_renderer->setDevicePixelRatio(m_device_pixel_ratio);
m_renderer->setRootNode(static_cast<QSGRootNode *>(root));
QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
bool deleteFboLater = false;
if (!m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format
|| (!m_fbo->format().mipmap() && m_mipmap))
{
if (!m_multisamplingChecked) {
if (m_context->openglContext()->format().samples() <= 1) {
m_multisampling = false;
} else {
const QSet<QByteArray> extensions = m_context->openglContext()->extensions();
m_multisampling = extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_multisample"))
&& extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_blit"));
}
m_multisamplingChecked = true;
}
if (m_multisampling) {
// Don't delete the FBO right away in case it is used recursively.
deleteFboLater = true;
delete m_secondaryFbo;
QOpenGLFramebufferObjectFormat format;
format.setInternalTextureFormat(m_format);
format.setSamples(m_context->openglContext()->format().samples());
m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format);
m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_secondaryFbo);
} else {
QOpenGLFramebufferObjectFormat format;
format.setInternalTextureFormat(m_format);
format.setMipmap(m_mipmap);
if (m_recursive) {
deleteFboLater = true;
delete m_secondaryFbo;
m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format);
funcs->glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture());
updateBindOptions(true);
m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_secondaryFbo);
} else {
delete m_fbo;
delete m_secondaryFbo;
m_fbo = new QOpenGLFramebufferObject(m_size, format);
m_secondaryFbo = 0;
funcs->glBindTexture(GL_TEXTURE_2D, m_fbo->texture());
updateBindOptions(true);
m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_fbo);
}
}
}
if (m_recursive && !m_secondaryFbo) {
// m_fbo already created, m_recursive was just set.
Q_ASSERT(m_fbo);
Q_ASSERT(!m_multisampling);
m_secondaryFbo = new QOpenGLFramebufferObject(m_size, m_fbo->format());
funcs->glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture());
updateBindOptions(true);
}
// Render texture.
root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip and opacity update.
m_renderer->nodeChanged(root, QSGNode::DirtyForceUpdate); // Force render list update.
#ifdef QSG_DEBUG_FBO_OVERLAY
if (qmlFboOverlay()) {
if (!m_debugOverlay)
m_debugOverlay = new QSGSimpleRectNode();
m_debugOverlay->setRect(QRectF(0, 0, m_size.width(), m_size.height()));
m_debugOverlay->setColor(QColor(0xff, 0x00, 0x80, 0x40));
root->appendChildNode(m_debugOverlay);
}
#endif
m_dirtyTexture = false;
m_renderer->setDeviceRect(m_size);
m_renderer->setViewportRect(m_size);
QRectF mirrored(m_mirrorHorizontal ? m_rect.right() : m_rect.left(),
m_mirrorVertical ? m_rect.bottom() : m_rect.top(),
m_mirrorHorizontal ? -m_rect.width() : m_rect.width(),
m_mirrorVertical ? -m_rect.height() : m_rect.height());
m_renderer->setProjectionMatrixToRect(mirrored);
m_renderer->setClearColor(Qt::transparent);
if (m_multisampling) {
m_renderer->renderScene(BindableFbo(m_secondaryFbo, m_depthStencilBuffer.data()));
if (deleteFboLater) {
delete m_fbo;
QOpenGLFramebufferObjectFormat format;
format.setInternalTextureFormat(m_format);
format.setAttachment(QOpenGLFramebufferObject::NoAttachment);
format.setMipmap(m_mipmap);
format.setSamples(0);
m_fbo = new QOpenGLFramebufferObject(m_size, format);
funcs->glBindTexture(GL_TEXTURE_2D, m_fbo->texture());
updateBindOptions(true);
}
QRect r(QPoint(), m_size);
QOpenGLFramebufferObject::blitFramebuffer(m_fbo, r, m_secondaryFbo, r);
} else {
if (m_recursive) {
m_renderer->renderScene(BindableFbo(m_secondaryFbo, m_depthStencilBuffer.data()));
if (deleteFboLater) {
delete m_fbo;
QOpenGLFramebufferObjectFormat format;
format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
format.setInternalTextureFormat(m_format);
format.setMipmap(m_mipmap);
m_fbo = new QOpenGLFramebufferObject(m_size, format);
funcs->glBindTexture(GL_TEXTURE_2D, m_fbo->texture());
updateBindOptions(true);
}
qSwap(m_fbo, m_secondaryFbo);
} else {
m_renderer->renderScene(BindableFbo(m_fbo, m_depthStencilBuffer.data()));
}
}
if (m_mipmap) {
funcs->glBindTexture(GL_TEXTURE_2D, textureId());
funcs->glGenerateMipmap(GL_TEXTURE_2D);
}
root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip, opacity and render list update.
#ifdef QSG_DEBUG_FBO_OVERLAY
if (qmlFboOverlay())
root->removeChildNode(m_debugOverlay);
#endif
if (m_recursive)
markDirtyTexture(); // Continuously update if 'live' and 'recursive'.
}