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// Copyright (c) 2010 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 WEBKIT_GLUE_PLUGINS_MAC_GPU_PLUGIN_CONTAINER_H_
#define WEBKIT_GLUE_PLUGINS_MAC_GPU_PLUGIN_CONTAINER_H_
// The "GPU plugin" is currently implemented as a special kind of
// NPAPI plugin to provide high-performance on-screen 3D rendering for
// Pepper 3D.
//
// On Windows and X11 platforms the GPU plugin relies on cross-process
// parenting of windows, which is not supported via any public APIs in
// the Mac OS X window system.
//
// To achieve full hardware acceleration we use the new IOSurface APIs
// introduced in Mac OS X 10.6. The GPU plugin's process produces an
// IOSurface and renders into it using OpenGL. It uses the
// IOSurfaceGetID and IOSurfaceLookup APIs to pass a reference to this
// surface to the browser process for on-screen rendering. The GPU
// plugin essentially looks like a windowless plugin; the browser
// process gets all of the mouse events, because the plugin process
// does not have an on-screen window.
//
// This class encapsulates some of the management of these data
// structures, in conjunction with the MacGPUPluginContainerManager.
#include <CoreFoundation/CoreFoundation.h>
#include <OpenGL/OpenGL.h>
#include "app/gfx/native_widget_types.h"
#include "base/basictypes.h"
namespace webkit_glue {
struct WebPluginGeometry;
}
class MacGPUPluginContainerManager;
class MacGPUPluginContainer {
public:
MacGPUPluginContainer();
virtual ~MacGPUPluginContainer();
// Sets the backing store and size of this plugin container.
void SetSizeAndBackingStore(int32 width,
int32 height,
uint64 io_surface_identifier,
MacGPUPluginContainerManager* manager);
// Tells the plugin container that it has moved relative to the
// origin of the window, for example because of a scroll event.
void MoveTo(const webkit_glue::WebPluginGeometry& geom);
// Draws this plugin's contents, texture mapped onto a quad in the
// given OpenGL context. TODO(kbr): figure out and define exactly
// how the coordinate system will work out.
void Draw(CGLContextObj context);
// Enqueue our texture for later deletion. Call this before deleting
// this object.
void EnqueueTextureForDeletion(MacGPUPluginContainerManager* manager);
private:
// We currently only have a viable implementation of this class on
// Snow Leopard. We need to think about fallback strategies that
// will work on Leopard.
// The x and y coordinates of the plugin window on the web page.
// TODO(kbr): see whether additional clipping information is
// necessary.
int x_;
int y_;
void ReleaseIOSurface();
// The IOSurfaceRef, if any, that has been handed from the GPU
// plugin process back to the browser process for drawing.
// This is held as a CFTypeRef because we can't refer to the
// IOSurfaceRef type when building on 10.5.
CFTypeRef surface_;
// The width and height of the surface.
int32 width_;
int32 height_;
// The "live" OpenGL texture referring to this IOSurfaceRef. Note
// that per the CGLTexImageIOSurface2D API we do not need to
// explicitly update this texture's contents once created. All we
// need to do is ensure it is re-bound before attempting to draw
// with it.
GLuint texture_;
DISALLOW_COPY_AND_ASSIGN(MacGPUPluginContainer);
};
#endif // WEBKIT_GLUE_PLUGINS_MAC_GPU_PLUGIN_CONTAINER_H_
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