The Tor Browser: comparison widget/gonk/nativewindow/GonkNativeWindowJB.h

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+/*
+* Copyright (C) 2012 The Android Open Source Project
+* Copyright (C) 2013 Mozilla Foundation
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#ifndef NATIVEWINDOW_GONKNATIVEWINDOW_JB_H
+#define NATIVEWINDOW_GONKNATIVEWINDOW_JB_H
+#include <ui/GraphicBuffer.h>
+#include <utils/String8.h>
+#include <utils/Vector.h>
+#include <utils/threads.h>
+#include "CameraCommon.h"
+#include "GonkConsumerBaseJB.h"
+#include "GrallocImages.h"
+#include "mozilla/layers/LayersSurfaces.h"
+namespace mozilla {
+namespace layers {
+class PGrallocBufferChild;
+}
+}
+namespace android {
+// The user of GonkNativeWindow who wants to receive notification of
+// new frames should implement this interface.
+class GonkNativeWindowNewFrameCallback {
+public:
+virtual void OnNewFrame() = 0;
+};
+/**
+* GonkNativeWindow is a GonkBufferQueue consumer endpoint that allows clients
+* access to the whole BufferItem entry from GonkBufferQueue. Multiple buffers may
+* be acquired at once, to be used concurrently by the client. This consumer can
+* operate either in synchronous or asynchronous mode.
+*/
+class GonkNativeWindow: public GonkConsumerBase
+{
+typedef mozilla::layers::TextureClient TextureClient;
+public:
+typedef GonkConsumerBase::FrameAvailableListener FrameAvailableListener;
+typedef GonkBufferQueue::BufferItem BufferItem;
+enum { INVALID_BUFFER_SLOT = GonkBufferQueue::INVALID_BUFFER_SLOT };
+enum { NO_BUFFER_AVAILABLE = GonkBufferQueue::NO_BUFFER_AVAILABLE };
+// Create a new buffer item consumer. The consumerUsage parameter determines
+// the consumer usage flags passed to the graphics allocator. The
+// bufferCount parameter specifies how many buffers can be locked for user
+// access at the same time.
+GonkNativeWindow();
+virtual ~GonkNativeWindow();
+// set the name of the GonkNativeWindow that will be used to identify it in
+// log messages.
+void setName(const String8& name);
+// Gets the next graphics buffer from the producer, filling out the
+// passed-in BufferItem structure. Returns NO_BUFFER_AVAILABLE if the queue
+// of buffers is empty, and INVALID_OPERATION if the maximum number of
+// buffers is already acquired.
+//
+// Only a fixed number of buffers can be acquired at a time, determined by
+// the construction-time bufferCount parameter. If INVALID_OPERATION is
+// returned by acquireBuffer, then old buffers must be returned to the
+// queue by calling releaseBuffer before more buffers can be acquired.
+//
+// If waitForFence is true, and the acquired BufferItem has a valid fence object,
+// acquireBuffer will wait on the fence with no timeout before returning.
+#if ANDROID_VERSION >= 18
+status_t acquireBuffer(BufferItem *item, bool waitForFence = true);
+#endif
+// Returns an acquired buffer to the queue, allowing it to be reused. Since
+// only a fixed number of buffers may be acquired at a time, old buffers
+// must be released by calling releaseBuffer to ensure new buffers can be
+// acquired by acquireBuffer. Once a BufferItem is released, the caller must
+// not access any members of the BufferItem, and should immediately remove
+// all of its references to the BufferItem itself.
+#if ANDROID_VERSION >= 18
+status_t releaseBuffer(const BufferItem &item,
+const sp<Fence>& releaseFence = Fence::NO_FENCE);
+#endif
+sp<IGraphicBufferProducer> getProducerInterface() const { return getBufferQueue(); }
+// setDefaultBufferSize is used to set the size of buffers returned by
+// requestBuffers when a with and height of zero is requested.
+status_t setDefaultBufferSize(uint32_t w, uint32_t h);
+// setDefaultBufferFormat allows the BufferQueue to create
+// GraphicBuffers of a defaultFormat if no format is specified
+// in dequeueBuffer
+status_t setDefaultBufferFormat(uint32_t defaultFormat);
+// Get next frame from the queue, caller owns the returned buffer.
+mozilla::TemporaryRef<TextureClient> getCurrentBuffer();
+// Return the buffer to the queue and mark it as FREE. After that
+// the buffer is useable again for the decoder.
+void returnBuffer(TextureClient* client);
+mozilla::TemporaryRef<TextureClient> getTextureClientFromBuffer(ANativeWindowBuffer* buffer);
+void setNewFrameCallback(GonkNativeWindowNewFrameCallback* callback);
+static void RecycleCallback(TextureClient* client, void* closure);
+protected:
+virtual void onFrameAvailable();
+private:
+GonkNativeWindowNewFrameCallback* mNewFrameCallback;
+};
+} // namespace android
+#endif // NATIVEWINDOW_GONKNATIVEWINDOW_JB_H

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comparison: widget/gonk/nativewindow/GonkNativeWindowJB.h

widget/gonk/nativewindow/GonkNativeWindowJB.h