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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.
#include "ppapi/proxy/ppb_image_data_proxy.h"
#include <string.h> // For memcpy
#include <vector>
#include "base/logging.h"
#include "build/build_config.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/pp_resource.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/plugin_resource_tracker.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/shared_impl/host_resource.h"
#include "ppapi/shared_impl/resource.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/thunk.h"
#if !defined(OS_NACL)
#include "skia/ext/platform_canvas.h"
#include "ui/gfx/surface/transport_dib.h"
#endif
namespace ppapi {
namespace proxy {
ImageData::ImageData(const HostResource& resource,
const PP_ImageDataDesc& desc,
ImageHandle handle)
: Resource(OBJECT_IS_PROXY, resource),
desc_(desc) {
#if defined(OS_NACL)
// TODO(brettw) implement NaCl ImageData. This will involve just
// memory-mapping the handle as raw memory rather than as a transport DIB.
#error Implement this.
#elif defined(OS_WIN)
transport_dib_.reset(TransportDIB::CreateWithHandle(handle));
#else
transport_dib_.reset(TransportDIB::Map(handle));
#endif
}
ImageData::~ImageData() {
}
thunk::PPB_ImageData_API* ImageData::AsPPB_ImageData_API() {
return this;
}
PP_Bool ImageData::Describe(PP_ImageDataDesc* desc) {
memcpy(desc, &desc_, sizeof(PP_ImageDataDesc));
return PP_TRUE;
}
void* ImageData::Map() {
#if defined(OS_NACL)
#error Implement this.
#else
if (!mapped_canvas_.get()) {
mapped_canvas_.reset(transport_dib_->GetPlatformCanvas(desc_.size.width,
desc_.size.height));
if (!mapped_canvas_.get())
return NULL;
}
const SkBitmap& bitmap =
skia::GetTopDevice(*mapped_canvas_)->accessBitmap(true);
bitmap.lockPixels();
return bitmap.getAddr(0, 0);
#endif
}
void ImageData::Unmap() {
#if defined(OS_NACL)
#error Implement this.
#else
// TODO(brettw) have a way to unmap a TransportDIB. Currently this isn't
// possible since deleting the TransportDIB also frees all the handles.
// We need to add a method to TransportDIB to release the handles.
#endif
}
int32_t ImageData::GetSharedMemory(int* /* handle */,
uint32_t* /* byte_count */) {
// Not supported in the proxy (this method is for actually implementing the
// proxy in the host).
return PP_ERROR_NOACCESS;
}
skia::PlatformCanvas* ImageData::GetPlatformCanvas() {
#if defined(OS_NACL)
return NULL; // No canvas in NaCl.
#else
return mapped_canvas_.get();
#endif
}
// static
ImageHandle ImageData::NullHandle() {
#if defined(OS_WIN)
return NULL;
#elif defined(OS_MACOSX) || defined(OS_ANDROID)
return ImageHandle();
#else
return 0;
#endif
}
ImageHandle ImageData::HandleFromInt(int32_t i) {
#if defined(OS_WIN)
return reinterpret_cast<ImageHandle>(i);
#elif defined(OS_MACOSX) || defined(OS_ANDROID)
return ImageHandle(i, false);
#else
return static_cast<ImageHandle>(i);
#endif
}
PPB_ImageData_Proxy::PPB_ImageData_Proxy(Dispatcher* dispatcher)
: InterfaceProxy(dispatcher) {
}
PPB_ImageData_Proxy::~PPB_ImageData_Proxy() {
}
// static
PP_Resource PPB_ImageData_Proxy::CreateProxyResource(PP_Instance instance,
PP_ImageDataFormat format,
const PP_Size& size,
PP_Bool init_to_zero) {
PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
if (!dispatcher)
return 0;
HostResource result;
std::string image_data_desc;
ImageHandle image_handle = ImageData::NullHandle();
dispatcher->Send(new PpapiHostMsg_PPBImageData_Create(
kApiID, instance, format, size, init_to_zero,
&result, &image_data_desc, &image_handle));
if (result.is_null() || image_data_desc.size() != sizeof(PP_ImageDataDesc))
return 0;
// We serialize the PP_ImageDataDesc just by copying to a string.
PP_ImageDataDesc desc;
memcpy(&desc, image_data_desc.data(), sizeof(PP_ImageDataDesc));
return (new ImageData(result, desc, image_handle))->GetReference();
}
bool PPB_ImageData_Proxy::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PPB_ImageData_Proxy, msg)
IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBImageData_Create, OnHostMsgCreate)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PPB_ImageData_Proxy::OnHostMsgCreate(PP_Instance instance,
int32_t format,
const PP_Size& size,
PP_Bool init_to_zero,
HostResource* result,
std::string* image_data_desc,
ImageHandle* result_image_handle) {
*result_image_handle = ImageData::NullHandle();
thunk::EnterResourceCreation enter(instance);
if (enter.failed())
return;
PP_Resource resource = enter.functions()->CreateImageData(
instance, static_cast<PP_ImageDataFormat>(format), size, init_to_zero);
if (!resource)
return;
result->SetHostResource(instance, resource);
// Get the description, it's just serialized as a string.
thunk::EnterResourceNoLock<thunk::PPB_ImageData_API> enter_resource(
resource, false);
PP_ImageDataDesc desc;
if (enter_resource.object()->Describe(&desc) == PP_TRUE) {
image_data_desc->resize(sizeof(PP_ImageDataDesc));
memcpy(&(*image_data_desc)[0], &desc, sizeof(PP_ImageDataDesc));
}
// Get the shared memory handle.
uint32_t byte_count = 0;
int32_t handle = 0;
if (enter_resource.object()->GetSharedMemory(&handle, &byte_count) == PP_OK) {
#if defined(OS_WIN)
ImageHandle ih = ImageData::HandleFromInt(handle);
*result_image_handle = dispatcher()->ShareHandleWithRemote(ih, false);
#else
*result_image_handle = ImageData::HandleFromInt(handle);
#endif
}
}
} // namespace proxy
} // namespace ppapi
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