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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
#define CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
#include "base/callback.h"
#include "content/common/content_export.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
namespace cc {
class Layer;
}
namespace gfx {
class JavaBitmap;
}
namespace content {
// An interface to the browser-side compositor.
class CONTENT_EXPORT Compositor {
public:
class Client {
public:
// Tells the client that it should schedule a composite.
virtual void ScheduleComposite() = 0;
// The compositor has completed swapping a frame.
virtual void OnSwapBuffersCompleted() {}
};
virtual ~Compositor() {}
// Performs the global initialization needed before any compositor
// instance can be used. This should be called only once.
static void Initialize();
enum CompositorFlags {
// Creates a direct GL context on the thread that draws
// (i.e. main or impl thread).
DIRECT_CONTEXT_ON_DRAW_THREAD = 1,
// Runs the compositor in threaded mode.
ENABLE_COMPOSITOR_THREAD = 1 << 1,
};
// Initialize with flags. This should only be called once instead
// of Initialize().
static void InitializeWithFlags(uint32 flags);
// Creates and returns a compositor instance.
static Compositor* Create(Client* client);
// Attaches the layer tree.
virtual void SetRootLayer(scoped_refptr<cc::Layer> root) = 0;
// Set the scale factor from DIP to pixel.
virtual void setDeviceScaleFactor(float factor) = 0;
// Set the output surface bounds.
virtual void SetWindowBounds(const gfx::Size& size) = 0;
// Sets the window visibility. When becoming invisible, resources will get
// freed and other calls into the compositor are not allowed until after
// having been made visible again.
virtual void SetVisible(bool visible) = 0;
// Set the output surface handle which the compositor renders into.
// DEPRECATED: Use SetSurface() which takes a Java Surface object.
virtual void SetWindowSurface(ANativeWindow* window) = 0;
// Set the output surface which the compositor renders into.
virtual void SetSurface(jobject surface) = 0;
// Tells the view tree to assume a transparent background when rendering.
virtual void SetHasTransparentBackground(bool flag) = 0;
// Attempts to composite and read back the result into the provided buffer.
// The buffer must be at least window width * height * 4 (RGBA) bytes large.
// The buffer is not modified if false is returned.
virtual bool CompositeAndReadback(void *pixels, const gfx::Rect& rect) = 0;
// Composite immediately. Used in single-threaded mode.
virtual void Composite() = 0;
// Generates an OpenGL texture and returns a texture handle. May return 0
// if the current context is lost.
virtual WebKit::WebGLId GenerateTexture(gfx::JavaBitmap& bitmap) = 0;
// Generates an OpenGL compressed texture and returns a texture handle. May
// return 0 if the current context is lost.
virtual WebKit::WebGLId GenerateCompressedTexture(gfx::Size& size,
int data_size,
void* data) = 0;
// Deletes an OpenGL texture.
virtual void DeleteTexture(WebKit::WebGLId texture_id) = 0;
// Grabs a copy of |texture_id| and saves it into |bitmap|. No scaling is
// done. It is assumed that the texture size matches that of the bitmap.
virtual bool CopyTextureToBitmap(WebKit::WebGLId texture_id,
gfx::JavaBitmap& bitmap) = 0;
// Grabs a copy of |texture_id| and saves it into |bitmap|. No scaling is
// done. |src_rect| allows the caller to specify which rect of |texture_id|
// to copy to |bitmap|. It needs to match the size of |bitmap|. Returns
// true if the |texture_id| was copied into |bitmap|, false if not.
virtual bool CopyTextureToBitmap(WebKit::WebGLId texture_id,
const gfx::Rect& src_rect,
gfx::JavaBitmap& bitmap) = 0;
protected:
Compositor() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
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