nsBaseWidget::AutoLayerManagerSetup::~AutoLayerManagerSetup()
{
BasicLayerManager* manager =
static_cast<BasicLayerManager*>(mWidget->GetLayerManager());
if (manager) {
NS_ASSERTION(manager->GetBackendType() == LAYERS_BASIC,
"AutoLayerManagerSetup instantiated for non-basic layer backend!");
manager->SetDefaultTarget(nullptr);
manager->SetDefaultTargetConfiguration(mozilla::layers::BUFFER_NONE, ROTATION_0);
}
}
nsBaseWidget::AutoLayerManagerSetup::AutoLayerManagerSetup(
nsBaseWidget* aWidget, gfxContext* aTarget,
BufferMode aDoubleBuffering, ScreenRotation aRotation)
: mWidget(aWidget)
{
BasicLayerManager* manager =
static_cast<BasicLayerManager*>(mWidget->GetLayerManager());
if (manager) {
NS_ASSERTION(manager->GetBackendType() == LAYERS_BASIC,
"AutoLayerManagerSetup instantiated for non-basic layer backend!");
manager->SetDefaultTarget(aTarget);
manager->SetDefaultTargetConfiguration(aDoubleBuffering, aRotation);
}
}
LayerManager *
nsWindow::GetLayerManager(PLayerTransactionChild* aShadowManager,
LayersBackend aBackendHint,
LayerManagerPersistence aPersistence,
bool* aAllowRetaining)
{
if (aAllowRetaining)
*aAllowRetaining = true;
if (mLayerManager) {
// This layer manager might be used for painting outside of DoDraw(), so we need
// to set the correct rotation on it.
if (mLayerManager->GetBackendType() == LAYERS_BASIC) {
BasicLayerManager* manager =
static_cast<BasicLayerManager*>(mLayerManager.get());
manager->SetDefaultTargetConfiguration(mozilla::layers::BUFFER_NONE,
ScreenRotation(EffectiveScreenRotation()));
} else if (mLayerManager->GetBackendType() == LAYERS_CLIENT) {
ClientLayerManager* manager =
static_cast<ClientLayerManager*>(mLayerManager.get());
manager->SetDefaultTargetConfiguration(mozilla::layers::BUFFER_NONE,
ScreenRotation(EffectiveScreenRotation()));
}
return mLayerManager;
}
// Set mUseLayersAcceleration here to make it consistent with
// nsBaseWidget::GetLayerManager
mUseLayersAcceleration = ComputeShouldAccelerate(mUseLayersAcceleration);
nsWindow *topWindow = sTopWindows[0];
if (!topWindow) {
LOGW(" -- no topwindow\n");
return nullptr;
}
if (sUsingOMTC) {
CreateCompositor();
if (mLayerManager)
return mLayerManager;
}
if (mUseLayersAcceleration) {
DebugOnly<nsIntRect> fbBounds = gScreenBounds;
if (!sGLContext) {
sGLContext = GLContextProvider::CreateForWindow(this);
}
MOZ_ASSERT(fbBounds.value == gScreenBounds);
if (sGLContext) {
nsRefPtr<LayerManagerOGL> layerManager = new LayerManagerOGL(this);
if (layerManager->Initialize(sGLContext)) {
mLayerManager = layerManager;
return mLayerManager;
} else {
LOGW("Could not create OGL LayerManager");
}
} else {
LOGW("GL context was not created");
}
}
// Fall back to software rendering.
sFramebufferOpen = Framebuffer::Open();
if (sFramebufferOpen) {
LOG("Falling back to framebuffer software rendering");
} else {
LOGE("Failed to mmap fb(?!?), aborting ...");
NS_RUNTIMEABORT("Can't open GL context and can't fall back on /dev/graphics/fb0 ...");
}
mLayerManager = new ClientLayerManager(this);
mUseLayersAcceleration = false;
return mLayerManager;
}
