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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.
#include "chrome/renderer/pepper_plugin_delegate_impl.h"
#include "app/surface/transport_dib.h"
#include "base/scoped_ptr.h"
#if defined(OS_MACOSX)
#include "chrome/common/render_messages.h"
#include "chrome/renderer/render_thread.h"
#endif
namespace {
// Implements the Image2D using a TransportDIB.
class PlatformImage2DImpl : public pepper::PluginDelegate::PlatformImage2D {
public:
// This constructor will take ownership of the dib pointer.
PlatformImage2DImpl(int width, int height, TransportDIB* dib)
: width_(width),
height_(height),
dib_(dib) {
}
virtual skia::PlatformCanvas* Map() {
return dib_->GetPlatformCanvas(width_, height_);
}
virtual intptr_t GetSharedMemoryHandle() const {
return reinterpret_cast<intptr_t>(dib_.get());
}
private:
int width_;
int height_;
scoped_ptr<TransportDIB> dib_;
DISALLOW_COPY_AND_ASSIGN(PlatformImage2DImpl);
};
} // namespace
PepperPluginDelegateImpl::PepperPluginDelegateImpl(RenderView* render_view)
: render_view_(render_view) {
}
pepper::PluginDelegate::PlatformImage2D*
PepperPluginDelegateImpl::CreateImage2D(int width, int height) {
uint32 buffer_size = width * height * 4;
// Allocate the transport DIB and the PlatformCanvas pointing to it.
#if defined(OS_MACOSX)
// On the Mac, shared memory has to be created in the browser in order to
// work in the sandbox. Do this by sending a message to the browser
// requesting a TransportDIB (see also
// chrome/renderer/webplugin_delegate_proxy.cc, method
// WebPluginDelegateProxy::CreateBitmap() for similar code). Note that the
// TransportDIB is _not_ cached in the browser; this is because this memory
// gets flushed by the renderer into another TransportDIB that represents the
// page, which is then in turn flushed to the screen by the browser process.
// When |transport_dib_| goes out of scope in the dtor, all of its shared
// memory gets reclaimed.
TransportDIB::Handle dib_handle;
IPC::Message* msg = new ViewHostMsg_AllocTransportDIB(buffer_size,
false,
&dib_handle);
if (!RenderThread::current()->Send(msg))
return NULL;
if (!TransportDIB::is_valid(dib_handle))
return NULL;
TransportDIB* dib = TransportDIB::Map(dib_handle);
#else
static int next_dib_id = 0;
TransportDIB* dib = TransportDIB::Create(buffer_size, next_dib_id++);
if (!dib)
return NULL;
#endif
return new PlatformImage2DImpl(width, height, dib);
}
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