rework screenshot API and implementation

- SurfaceFlinger now supports to take a screenshot
  directly into an IGraphicBufferProducer

- reimplement the IMemoryHeap screenshot on top
  of the above

- reimplement LayerScreenshot such that its
  BufferQueue is directly used as the destination
  of the screenshot. LayerScreenshot is now a thin
  wrapper around Layer

Bug: 6940974

Change-Id: I69a2096b44b91acbb99eba16f83a9c78d94e0d10

1 files changed, 9 insertions, 0 deletions

diff --git a/include/gui/SurfaceComposerClient.h b/include/gui/SurfaceComposerClient.h
index 9e4d6fc301..38c931d230 100644
--- a/include/gui/SurfaceComposerClient.h
+++ b/include/gui/SurfaceComposerClient.h
@@ -156,10 +156,19 @@ private:
 
 class ScreenshotClient
 {
+public:
+    static status_t capture(
+            const sp<IBinder>& display,
+            const sp<IGraphicBufferProducer>& producer,
+            uint32_t reqWidth, uint32_t reqHeight,
+            uint32_t minLayerZ, uint32_t maxLayerZ);
+
+private:
     sp<IMemoryHeap> mHeap;
     uint32_t mWidth;
     uint32_t mHeight;
     PixelFormat mFormat;
+
 public:
     ScreenshotClient();