New widget: TextureView

Bug #4343984

TextureView can be used to render media content (video, OpenGL,
RenderScript) inside a View.

The key difference with SurfaceView is that TextureView does
not create a new Surface. This gives the ability to seamlessly
transform, animate, fade, etc. a TextureView, which was hard
if not impossible to do with a SurfaceView.
A TextureView also interacts perfectly with ScrollView,
ListView, etc. It allows application to embed media content
in a much more flexible way than before.

For instance, to render the camera preview at 50% opacity,
all you need to do is the following:

mTextureView.setAlpha(0.5f);
Camera c = Camera.open();
c.setPreviewTexture(mTextureView.getSurfaceTexture());
c.startPreview();

TextureView uses a SurfaceTexture to get the job done. More
APIs are required to make it easy to create OpenGL contexts
for a TextureView. It can currently be done with a bit of
JNI code.

Change-Id: Iaa7953097ab5beb8437bcbbfa03b2df5b7f80cd7

1 files changed, 3 insertions, 0 deletions

diff --git a/libs/hwui/LayerRenderer.h b/libs/hwui/LayerRenderer.h
index d2f565e4f307..b3cd5db4fbe2 100644
--- a/libs/hwui/LayerRenderer.h
+++ b/libs/hwui/LayerRenderer.h
@@ -53,8 +53,11 @@ public:
     Region* getRegion();
     GLint getTargetFbo();
 
+    static Layer* createTextureLayer();
     static Layer* createLayer(uint32_t width, uint32_t height, bool isOpaque = false);
     static bool resizeLayer(Layer* layer, uint32_t width, uint32_t height);
+    static void updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
+            float* transform);
     static void destroyLayer(Layer* layer);
     static void destroyLayerDeferred(Layer* layer);