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// Copyright (c) 2011 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 "webkit/plugins/ppapi/ppb_buffer_impl.h"
#include <algorithm>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "ppapi/c/dev/ppb_buffer_dev.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/c/pp_resource.h"
#include "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
namespace webkit {
namespace ppapi {
namespace {
PP_Resource Create(PP_Instance instance_id, uint32_t size) {
PluginInstance* instance = ResourceTracker::Get()->GetInstance(instance_id);
if (!instance)
return 0;
scoped_refptr<PPB_Buffer_Impl> buffer(new PPB_Buffer_Impl(instance));
if (!buffer->Init(size))
return 0;
return buffer->GetReference();
}
PP_Bool IsPPB_Buffer_Impl(PP_Resource resource) {
return BoolToPPBool(!!Resource::GetAs<PPB_Buffer_Impl>(resource));
}
PP_Bool Describe(PP_Resource resource, uint32_t* size_in_bytes) {
scoped_refptr<PPB_Buffer_Impl> buffer(
Resource::GetAs<PPB_Buffer_Impl>(resource));
if (!buffer)
return PP_FALSE;
buffer->Describe(size_in_bytes);
return PP_TRUE;
}
void* Map(PP_Resource resource) {
scoped_refptr<PPB_Buffer_Impl> buffer(
Resource::GetAs<PPB_Buffer_Impl>(resource));
if (!buffer)
return NULL;
return buffer->Map();
}
void Unmap(PP_Resource resource) {
scoped_refptr<PPB_Buffer_Impl> buffer(
Resource::GetAs<PPB_Buffer_Impl>(resource));
if (!buffer)
return;
return buffer->Unmap();
}
const PPB_Buffer_Dev ppb_buffer = {
&Create,
&IsPPB_Buffer_Impl,
&Describe,
&Map,
&Unmap,
};
} // namespace
PPB_Buffer_Impl::PPB_Buffer_Impl(PluginInstance* instance)
: Resource(instance),
size_(0) {
}
PPB_Buffer_Impl::~PPB_Buffer_Impl() {
}
// static
const PPB_Buffer_Dev* PPB_Buffer_Impl::GetInterface() {
return &ppb_buffer;
}
PPB_Buffer_Impl* PPB_Buffer_Impl::AsPPB_Buffer_Impl() {
return this;
}
bool PPB_Buffer_Impl::Init(uint32_t size) {
if (size == 0)
return false;
Unmap();
size_ = size;
return true;
}
void PPB_Buffer_Impl::Describe(uint32_t* size_in_bytes) const {
*size_in_bytes = size_;
}
void* PPB_Buffer_Impl::Map() {
if (size_ == 0)
return NULL;
if (!is_mapped()) {
mem_buffer_.reset(new unsigned char[size_]);
memset(mem_buffer_.get(), 0, size_);
}
return mem_buffer_.get();
}
void PPB_Buffer_Impl::Unmap() {
mem_buffer_.reset();
}
} // namespace ppapi
} // namespace webkit
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