Add captureLayers function to capture a layer and its children.
The captureLayers function gets a root layer as its argument.
It will capture the content for that layer and its descendants. The
capture will set the root layer's transform back to (0, 0).
Test: Transaction_test ScreenCaptureTest
Change-Id: I84fb66a65cd91434cddc99506b1924cf9f950935
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 05c76fc..fe9409b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2650,6 +2650,7 @@
{
ALOGV("doComposeSurfaces");
+ const DisplayRenderArea renderArea(displayDevice);
const auto hwcId = displayDevice->getHwcDisplayId();
mat4 oldColorMatrix;
@@ -2759,12 +2760,12 @@
&& hasClientComposition) {
// never clear the very first layer since we're
// guaranteed the FB is already cleared
- layer->clearWithOpenGL(displayDevice);
+ layer->clearWithOpenGL(renderArea);
}
break;
}
case HWC2::Composition::Client: {
- layer->draw(displayDevice, clip);
+ layer->draw(renderArea, clip);
break;
}
default:
@@ -2781,7 +2782,7 @@
const Region clip(dirty.intersect(
displayTransform.transform(layer->visibleRegion)));
if (!clip.isEmpty()) {
- layer->draw(displayDevice, clip);
+ layer->draw(renderArea, clip);
}
}
}
@@ -4029,6 +4030,17 @@
}
break;
}
+ case CAPTURE_LAYERS: {
+ IPCThreadState* ipc = IPCThreadState::self();
+ const int pid = ipc->getCallingPid();
+ const int uid = ipc->getCallingUid();
+ if ((uid != AID_GRAPHICS) &&
+ !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
+ ALOGE("Permission Denial: can't read framebuffer pid=%d, uid=%d", pid, uid);
+ return PERMISSION_DENIED;
+ }
+ break;
+ }
}
return OK;
}
@@ -4228,35 +4240,6 @@
repaintEverythingLocked();
}
-// Checks that the requested width and height are valid and updates them to the display dimensions
-// if they are set to 0
-static status_t updateDimensionsLocked(const sp<const DisplayDevice>& displayDevice,
- Transform::orientation_flags rotation,
- uint32_t* requestedWidth, uint32_t* requestedHeight) {
- // get screen geometry
- uint32_t displayWidth = displayDevice->getWidth();
- uint32_t displayHeight = displayDevice->getHeight();
-
- if (rotation & Transform::ROT_90) {
- std::swap(displayWidth, displayHeight);
- }
-
- if ((*requestedWidth > displayWidth) || (*requestedHeight > displayHeight)) {
- ALOGE("size mismatch (%d, %d) > (%d, %d)",
- *requestedWidth, *requestedHeight, displayWidth, displayHeight);
- return BAD_VALUE;
- }
-
- if (*requestedWidth == 0) {
- *requestedWidth = displayWidth;
- }
- if (*requestedHeight == 0) {
- *requestedHeight = displayHeight;
- }
-
- return NO_ERROR;
-}
-
// A simple RAII class to disconnect from an ANativeWindow* when it goes out of scope
class WindowDisconnector {
public:
@@ -4305,50 +4288,86 @@
}
status_t SurfaceFlinger::captureScreen(const sp<IBinder>& display,
- const sp<IGraphicBufferProducer>& producer,
- Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
- int32_t minLayerZ, int32_t maxLayerZ,
- bool useIdentityTransform, ISurfaceComposer::Rotation rotation) {
+ const sp<IGraphicBufferProducer>& producer, Rect sourceCrop,
+ uint32_t reqWidth, uint32_t reqHeight, int32_t minLayerZ,
+ int32_t maxLayerZ, bool useIdentityTransform,
+ ISurfaceComposer::Rotation rotation) {
ATRACE_CALL();
- if (CC_UNLIKELY(display == 0))
- return BAD_VALUE;
+ if (CC_UNLIKELY(display == 0)) return BAD_VALUE;
+
+ const sp<const DisplayDevice> device(getDisplayDeviceLocked(display));
+ DisplayRenderArea renderArea(device, sourceCrop, reqHeight, reqWidth, rotation);
+
+ auto traverseLayers = std::bind(std::mem_fn(&SurfaceFlinger::traverseLayersInDisplay), this,
+ device, minLayerZ, maxLayerZ, std::placeholders::_1);
+ return captureScreenCommon(renderArea, traverseLayers, producer, useIdentityTransform);
+}
+
+status_t SurfaceFlinger::captureLayers(const sp<IBinder>& layerHandleBinder,
+ const sp<IGraphicBufferProducer>& producer,
+ ISurfaceComposer::Rotation rotation) {
+ ATRACE_CALL();
+
+ class LayerRenderArea : public RenderArea {
+ public:
+ LayerRenderArea(const sp<Layer>& layer, ISurfaceComposer::Rotation rotation)
+ : RenderArea(layer->getCurrentState().active.h, layer->getCurrentState().active.w,
+ rotation),
+ mLayer(layer) {}
+ const Transform& getTransform() const override {
+ // Make the top level transform the inverse the transform and it's parent so it sets
+ // the whole capture back to 0,0
+ return *new Transform(mLayer->getTransform().inverse());
+ }
+ Rect getBounds() const override {
+ const Layer::State& layerState(mLayer->getDrawingState());
+ return Rect(layerState.active.w, layerState.active.h);
+ }
+ int getHeight() const override { return mLayer->getDrawingState().active.h; }
+ int getWidth() const override { return mLayer->getDrawingState().active.w; }
+ bool isSecure() const override { return false; }
+ bool needsFiltering() const override { return false; }
+
+ Rect getSourceCrop() const override { return getBounds(); }
+ bool getWideColorSupport() const override { return false; }
+ android_color_mode_t getActiveColorMode() const override { return HAL_COLOR_MODE_NATIVE; }
+
+ private:
+ const sp<Layer>& mLayer;
+ };
+
+ auto layerHandle = reinterpret_cast<Layer::Handle*>(layerHandleBinder.get());
+ auto parent = layerHandle->owner.promote();
+
+ LayerRenderArea renderArea(parent, rotation);
+ auto traverseLayers = [parent](const LayerVector::Visitor& visitor) {
+ parent->traverseChildrenInZOrder(LayerVector::StateSet::Drawing, [&](Layer* layer) {
+ if (!layer->isVisible()) {
+ return;
+ }
+ visitor(layer);
+ });
+ };
+ return captureScreenCommon(renderArea, traverseLayers, producer, false);
+}
+
+status_t SurfaceFlinger::captureScreenCommon(RenderArea& renderArea,
+ TraverseLayersFunction traverseLayers,
+ const sp<IGraphicBufferProducer>& producer,
+ bool useIdentityTransform) {
+ ATRACE_CALL();
if (CC_UNLIKELY(producer == 0))
return BAD_VALUE;
+ renderArea.updateDimensions();
+
// if we have secure windows on this display, never allow the screen capture
// unless the producer interface is local (i.e.: we can take a screenshot for
// ourselves).
bool isLocalScreenshot = IInterface::asBinder(producer)->localBinder();
- // Convert to surfaceflinger's internal rotation type.
- Transform::orientation_flags rotationFlags;
- switch (rotation) {
- case ISurfaceComposer::eRotateNone:
- rotationFlags = Transform::ROT_0;
- break;
- case ISurfaceComposer::eRotate90:
- rotationFlags = Transform::ROT_90;
- break;
- case ISurfaceComposer::eRotate180:
- rotationFlags = Transform::ROT_180;
- break;
- case ISurfaceComposer::eRotate270:
- rotationFlags = Transform::ROT_270;
- break;
- default:
- rotationFlags = Transform::ROT_0;
- ALOGE("Invalid rotation passed to captureScreen(): %d\n", rotation);
- break;
- }
-
- { // Autolock scope
- Mutex::Autolock lock(mStateLock);
- sp<const DisplayDevice> displayDevice(getDisplayDeviceLocked(display));
- updateDimensionsLocked(displayDevice, rotationFlags, &reqWidth, &reqHeight);
- }
-
// create a surface (because we're a producer, and we need to
// dequeue/queue a buffer)
sp<Surface> surface = new Surface(producer, false);
@@ -4369,9 +4388,9 @@
WindowDisconnector disconnector(window, NATIVE_WINDOW_API_EGL);
ANativeWindowBuffer* buffer = nullptr;
- result = getWindowBuffer(window, reqWidth, reqHeight,
- hasWideColorDisplay && !mForceNativeColorMode,
- getRenderEngine().usesWideColor(), &buffer);
+ result = getWindowBuffer(window, renderArea.getReqWidth(), renderArea.getReqHeight(),
+ hasWideColorDisplay && !mForceNativeColorMode,
+ getRenderEngine().usesWideColor(), &buffer);
if (result != NO_ERROR) {
return result;
}
@@ -4399,10 +4418,8 @@
int fd = -1;
{
Mutex::Autolock _l(mStateLock);
- sp<const DisplayDevice> device(getDisplayDeviceLocked(display));
- result = captureScreenImplLocked(device, buffer, sourceCrop, reqWidth, reqHeight,
- minLayerZ, maxLayerZ, useIdentityTransform,
- rotationFlags, isLocalScreenshot, &fd);
+ result = captureScreenImplLocked(renderArea, traverseLayers, buffer,
+ useIdentityTransform, isLocalScreenshot, &fd);
}
{
@@ -4431,84 +4448,66 @@
// queueBuffer takes ownership of syncFd
result = window->queueBuffer(window, buffer, syncFd);
}
-
return result;
}
-
-void SurfaceFlinger::renderScreenImplLocked(
- const sp<const DisplayDevice>& hw,
- Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
- int32_t minLayerZ, int32_t maxLayerZ,
- bool yswap, bool useIdentityTransform, Transform::orientation_flags rotation)
-{
+void SurfaceFlinger::renderScreenImplLocked(const RenderArea& renderArea,
+ TraverseLayersFunction traverseLayers, bool yswap,
+ bool useIdentityTransform) {
ATRACE_CALL();
+
RenderEngine& engine(getRenderEngine());
// get screen geometry
- const int32_t hw_w = hw->getWidth();
- const int32_t hw_h = hw->getHeight();
- const bool filtering = static_cast<int32_t>(reqWidth) != hw_w ||
- static_cast<int32_t>(reqHeight) != hw_h;
+ const auto raWidth = renderArea.getWidth();
+ const auto raHeight = renderArea.getHeight();
+
+ const auto reqWidth = renderArea.getReqWidth();
+ const auto reqHeight = renderArea.getReqHeight();
+ Rect sourceCrop = renderArea.getSourceCrop();
+
+ const bool filtering = static_cast<int32_t>(reqWidth) != raWidth ||
+ static_cast<int32_t>(reqHeight) != raHeight;
// if a default or invalid sourceCrop is passed in, set reasonable values
- if (sourceCrop.width() == 0 || sourceCrop.height() == 0 ||
- !sourceCrop.isValid()) {
+ if (sourceCrop.width() == 0 || sourceCrop.height() == 0 || !sourceCrop.isValid()) {
sourceCrop.setLeftTop(Point(0, 0));
- sourceCrop.setRightBottom(Point(hw_w, hw_h));
+ sourceCrop.setRightBottom(Point(raWidth, raHeight));
}
// ensure that sourceCrop is inside screen
if (sourceCrop.left < 0) {
ALOGE("Invalid crop rect: l = %d (< 0)", sourceCrop.left);
}
- if (sourceCrop.right > hw_w) {
- ALOGE("Invalid crop rect: r = %d (> %d)", sourceCrop.right, hw_w);
+ if (sourceCrop.right > raWidth) {
+ ALOGE("Invalid crop rect: r = %d (> %d)", sourceCrop.right, raWidth);
}
if (sourceCrop.top < 0) {
ALOGE("Invalid crop rect: t = %d (< 0)", sourceCrop.top);
}
- if (sourceCrop.bottom > hw_h) {
- ALOGE("Invalid crop rect: b = %d (> %d)", sourceCrop.bottom, hw_h);
+ if (sourceCrop.bottom > raHeight) {
+ ALOGE("Invalid crop rect: b = %d (> %d)", sourceCrop.bottom, raHeight);
}
-#ifdef USE_HWC2
- engine.setWideColor(hw->getWideColorSupport() && !mForceNativeColorMode);
- engine.setColorMode(mForceNativeColorMode ? HAL_COLOR_MODE_NATIVE : hw->getActiveColorMode());
-#endif
+ engine.setWideColor(renderArea.getWideColorSupport() && !mForceNativeColorMode);
+ engine.setColorMode(mForceNativeColorMode ? HAL_COLOR_MODE_NATIVE : renderArea.getActiveColorMode());
// make sure to clear all GL error flags
engine.checkErrors();
// set-up our viewport
- engine.setViewportAndProjection(
- reqWidth, reqHeight, sourceCrop, hw_h, yswap, rotation);
+ engine.setViewportAndProjection(reqWidth, reqHeight, sourceCrop, raHeight, yswap,
+ renderArea.getRotationFlags());
engine.disableTexturing();
// redraw the screen entirely...
engine.clearWithColor(0, 0, 0, 1);
- // We loop through the first level of layers without traversing,
- // as we need to interpret min/max layer Z in the top level Z space.
- for (const auto& layer : mDrawingState.layersSortedByZ) {
- if (!layer->belongsToDisplay(hw->getLayerStack(), false)) {
- continue;
- }
- const Layer::State& state(layer->getDrawingState());
- if (state.z < minLayerZ || state.z > maxLayerZ) {
- continue;
- }
- layer->traverseInZOrder(LayerVector::StateSet::Drawing, [&](Layer* layer) {
- if (!layer->isVisible()) {
- return;
- }
- if (filtering) layer->setFiltering(true);
- layer->draw(hw, useIdentityTransform);
- if (filtering) layer->setFiltering(false);
- });
- }
-
- hw->setViewportAndProjection();
+ traverseLayers([&](Layer* layer) {
+ if (filtering) layer->setFiltering(true);
+ layer->draw(renderArea, useIdentityTransform);
+ if (filtering) layer->setFiltering(false);
+ });
}
// A simple RAII class that holds an EGLImage and destroys it either:
@@ -4531,27 +4530,18 @@
EGLImageKHR mImage;
};
-status_t SurfaceFlinger::captureScreenImplLocked(const sp<const DisplayDevice>& hw,
- ANativeWindowBuffer* buffer, Rect sourceCrop,
- uint32_t reqWidth, uint32_t reqHeight,
- int32_t minLayerZ, int32_t maxLayerZ,
- bool useIdentityTransform,
- Transform::orientation_flags rotation,
- bool isLocalScreenshot, int* outSyncFd) {
+status_t SurfaceFlinger::captureScreenImplLocked(const RenderArea& renderArea,
+ TraverseLayersFunction traverseLayers,
+ ANativeWindowBuffer* buffer,
+ bool useIdentityTransform, bool isLocalScreenshot,
+ int* outSyncFd) {
ATRACE_CALL();
bool secureLayerIsVisible = false;
- for (const auto& layer : mDrawingState.layersSortedByZ) {
- const Layer::State& state(layer->getDrawingState());
- if (!layer->belongsToDisplay(hw->getLayerStack(), false) ||
- (state.z < minLayerZ || state.z > maxLayerZ)) {
- continue;
- }
- layer->traverseInZOrder(LayerVector::StateSet::Drawing, [&](Layer *layer) {
- secureLayerIsVisible = secureLayerIsVisible || (layer->isVisible() &&
- layer->isSecure());
- });
- }
+
+ traverseLayers([&](Layer* layer) {
+ secureLayerIsVisible = secureLayerIsVisible || (layer->isVisible() && layer->isSecure());
+ });
if (!isLocalScreenshot && secureLayerIsVisible) {
ALOGW("FB is protected: PERMISSION_DENIED");
@@ -4582,9 +4572,7 @@
// via an FBO, which means we didn't have to create
// an EGLSurface and therefore we're not
// dependent on the context's EGLConfig.
- renderScreenImplLocked(
- hw, sourceCrop, reqWidth, reqHeight, minLayerZ, maxLayerZ, true,
- useIdentityTransform, rotation);
+ renderScreenImplLocked(renderArea, traverseLayers, true, useIdentityTransform);
// Attempt to create a sync khr object that can produce a sync point. If that
// isn't available, create a non-dupable sync object in the fallback path and
@@ -4625,46 +4613,40 @@
*outSyncFd = syncFd;
if (DEBUG_SCREENSHOTS) {
+ const auto reqWidth = renderArea.getReqWidth();
+ const auto reqHeight = renderArea.getReqHeight();
+
uint32_t* pixels = new uint32_t[reqWidth*reqHeight];
getRenderEngine().readPixels(0, 0, reqWidth, reqHeight, pixels);
- checkScreenshot(reqWidth, reqHeight, reqWidth, pixels,
- hw, minLayerZ, maxLayerZ);
+ checkScreenshot(reqWidth, reqHeight, reqWidth, pixels, traverseLayers);
delete [] pixels;
}
// destroy our image
imageHolder.destroy();
-
return NO_ERROR;
}
void SurfaceFlinger::checkScreenshot(size_t w, size_t s, size_t h, void const* vaddr,
- const sp<const DisplayDevice>& hw, int32_t minLayerZ, int32_t maxLayerZ) {
+ TraverseLayersFunction traverseLayers) {
if (DEBUG_SCREENSHOTS) {
- for (size_t y=0 ; y<h ; y++) {
- uint32_t const * p = (uint32_t const *)vaddr + y*s;
- for (size_t x=0 ; x<w ; x++) {
+ for (size_t y = 0; y < h; y++) {
+ uint32_t const* p = (uint32_t const*)vaddr + y * s;
+ for (size_t x = 0; x < w; x++) {
if (p[x] != 0xFF000000) return;
}
}
- ALOGE("*** we just took a black screenshot ***\n"
- "requested minz=%d, maxz=%d, layerStack=%d",
- minLayerZ, maxLayerZ, hw->getLayerStack());
+ ALOGE("*** we just took a black screenshot ***");
size_t i = 0;
- for (const auto& layer : mDrawingState.layersSortedByZ) {
+ traverseLayers([&](Layer* layer) {
const Layer::State& state(layer->getDrawingState());
- if (layer->belongsToDisplay(hw->getLayerStack(), false) && state.z >= minLayerZ &&
- state.z <= maxLayerZ) {
- layer->traverseInZOrder(LayerVector::StateSet::Drawing, [&](Layer* layer) {
- ALOGE("%c index=%zu, name=%s, layerStack=%d, z=%d, visible=%d, flags=%x, alpha=%.3f",
- layer->isVisible() ? '+' : '-',
- i, layer->getName().string(), layer->getLayerStack(), state.z,
- layer->isVisible(), state.flags, static_cast<float>(state.color.a));
- i++;
- });
- }
- }
+ ALOGE("%c index=%zu, name=%s, layerStack=%d, z=%d, visible=%d, flags=%x, alpha=%.3f",
+ layer->isVisible() ? '+' : '-', i, layer->getName().string(),
+ layer->getLayerStack(), state.z, layer->isVisible(), state.flags,
+ static_cast<float>(state.color.a));
+ i++;
+ });
}
}
@@ -4678,6 +4660,28 @@
layersSortedByZ.traverseInReverseZOrder(stateSet, visitor);
}
+void SurfaceFlinger::traverseLayersInDisplay(const sp<const DisplayDevice>& hw, int32_t minLayerZ,
+ int32_t maxLayerZ,
+ const LayerVector::Visitor& visitor) {
+ // We loop through the first level of layers without traversing,
+ // as we need to interpret min/max layer Z in the top level Z space.
+ for (const auto& layer : mDrawingState.layersSortedByZ) {
+ if (!layer->belongsToDisplay(hw->getLayerStack(), false)) {
+ continue;
+ }
+ const Layer::State& state(layer->getDrawingState());
+ if (state.z < minLayerZ || state.z > maxLayerZ) {
+ continue;
+ }
+ layer->traverseInZOrder(LayerVector::StateSet::Drawing, [&](Layer* layer) {
+ if (!layer->isVisible()) {
+ return;
+ }
+ visitor(layer);
+ });
+ }
+}
+
}; // namespace android