Refactor SurfaceTexture a bit.
Rearranges updateTexImage() so that the SurfaceFlinger-specific
behavior is in a new SurfaceFlingerConsumer subclass.
SurfaceTexture behavior should not be altered. Instead of
acquire-bind-release we now do acquire-release-bind, but since
it's all done with the lock held there shouldn't be any
externally-visible change.
Change-Id: Ia566e4727945e2cfb9359fc6d2a8f8af64d7b7b7
diff --git a/include/gui/SurfaceTexture.h b/include/gui/SurfaceTexture.h
index b498a5c..a8b7d74 100644
--- a/include/gui/SurfaceTexture.h
+++ b/include/gui/SurfaceTexture.h
@@ -74,14 +74,13 @@
GLenum texTarget = GL_TEXTURE_EXTERNAL_OES, bool useFenceSync = true,
const sp<BufferQueue> &bufferQueue = 0);
- // updateTexImage sets the image contents of the target texture to that of
- // the most recently queued buffer.
+ // updateTexImage acquires the most recently queued buffer, and sets the
+ // image contents of the target texture to it.
//
// This call may only be made while the OpenGL ES context to which the
// target texture belongs is bound to the calling thread.
//
- // After calling this method the doGLFenceWait method must be called
- // before issuing OpenGL ES commands that access the texture contents.
+ // This calls doGLFenceWait to ensure proper synchronization.
status_t updateTexImage();
// setReleaseFence stores a fence file descriptor that will signal when the
@@ -161,8 +160,7 @@
// doGLFenceWait inserts a wait command into the OpenGL ES command stream
// to ensure that it is safe for future OpenGL ES commands to access the
- // current texture buffer. This must be called each time updateTexImage
- // is called before issuing OpenGL ES commands that access the texture.
+ // current texture buffer.
status_t doGLFenceWait() const;
// isSynchronousMode returns whether the SurfaceTexture is currently in
@@ -233,23 +231,33 @@
virtual status_t releaseBufferLocked(int buf, EGLDisplay display,
EGLSyncKHR eglFence);
+ status_t releaseBufferLocked(int buf, EGLSyncKHR eglFence) {
+ return releaseBufferLocked(buf, mEglDisplay, eglFence);
+ }
+
static bool isExternalFormat(uint32_t format);
-private:
- // this version of updateTexImage() takes a functor used to reject or not
- // the newly acquired buffer.
- // this API is TEMPORARY and intended to be used by SurfaceFlinger only,
- // which is why class Layer is made a friend of SurfaceTexture below.
- class BufferRejecter {
- friend class SurfaceTexture;
- virtual bool reject(const sp<GraphicBuffer>& buf,
- const BufferQueue::BufferItem& item) = 0;
- protected:
- virtual ~BufferRejecter() { }
- };
- friend class Layer;
- status_t updateTexImage(BufferRejecter* rejecter, bool skipSync);
+ // This releases the buffer in the slot referenced by mCurrentTexture,
+ // then updates state to refer to the BufferItem, which must be a
+ // newly-acquired buffer.
+ status_t releaseAndUpdateLocked(const BufferQueue::BufferItem& item);
+ // Binds mTexName and the current buffer to mTexTarget. Uses
+ // mCurrentTexture if it's set, mCurrentTextureBuf if not.
+ status_t bindTextureImage();
+
+ // doGLFenceWaitLocked inserts a wait command into the OpenGL ES command
+ // stream to ensure that it is safe for future OpenGL ES commands to
+ // access the current texture buffer.
+ status_t doGLFenceWaitLocked() const;
+
+ // Gets the current EGLDisplay and EGLContext values, and compares them
+ // to mEglDisplay and mEglContext. If the fields have been previously
+ // set, the values must match; if not, the fields are set to the current
+ // values.
+ status_t checkAndUpdateEglStateLocked();
+
+private:
// createImage creates a new EGLImage from a GraphicBuffer.
EGLImageKHR createImage(EGLDisplay dpy,
const sp<GraphicBuffer>& graphicBuffer);
@@ -267,19 +275,19 @@
// mCurrentTextureBuf must not be NULL.
void computeCurrentTransformMatrixLocked();
- // doGLFenceWaitLocked inserts a wait command into the OpenGL ES command
- // stream to ensure that it is safe for future OpenGL ES commands to
- // access the current texture buffer. This must be called each time
- // updateTexImage is called before issuing OpenGL ES commands that access
- // the texture.
- status_t doGLFenceWaitLocked() const;
-
// syncForReleaseLocked performs the synchronization needed to release the
// current slot from an OpenGL ES context. If needed it will set the
// current slot's fence to guard against a producer accessing the buffer
// before the outstanding accesses have completed.
status_t syncForReleaseLocked(EGLDisplay dpy);
+ // Normally, when we bind a buffer to a texture target, we bind a buffer
+ // that is referenced by an entry in mEglSlots. In some situations we
+ // have a buffer in mCurrentTextureBuf, but no corresponding entry for
+ // it in our slot array. bindUnslottedBuffer handles that situation by
+ // binding the buffer without touching the EglSlots.
+ status_t bindUnslottedBufferLocked(EGLDisplay dpy);
+
// The default consumer usage flags that SurfaceTexture always sets on its
// BufferQueue instance; these will be OR:d with any additional flags passed
// from the SurfaceTexture user. In particular, SurfaceTexture will always
@@ -344,8 +352,8 @@
// EGLSlot contains the information and object references that
// SurfaceTexture maintains about a BufferQueue buffer slot.
- struct EGLSlot {
- EGLSlot()
+ struct EglSlot {
+ EglSlot()
: mEglImage(EGL_NO_IMAGE_KHR),
mEglFence(EGL_NO_SYNC_KHR) {
}
@@ -379,7 +387,7 @@
// slot that has not yet been used. The buffer allocated to a slot will also
// be replaced if the requested buffer usage or geometry differs from that
// of the buffer allocated to a slot.
- EGLSlot mEglSlots[BufferQueue::NUM_BUFFER_SLOTS];
+ EglSlot mEglSlots[BufferQueue::NUM_BUFFER_SLOTS];
// mCurrentTexture is the buffer slot index of the buffer that is currently
// bound to the OpenGL texture. It is initialized to INVALID_BUFFER_SLOT,