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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 "webkit/glue/plugins/pepper_buffer.h"
#include <algorithm>
#include "base/logging.h"
#include "base/scoped_ptr.h"
#include "third_party/ppapi/c/pp_instance.h"
#include "third_party/ppapi/c/pp_module.h"
#include "third_party/ppapi/c/pp_resource.h"
#include "third_party/ppapi/c/ppb_buffer.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_plugin_module.h"
namespace pepper {
namespace {
PP_Resource Create(PP_Module module_id, int32_t size) {
PluginModule* module = PluginModule::FromPPModule(module_id);
if (!module)
return NULL;
scoped_refptr<Buffer> buffer(new Buffer(module));
if (!buffer->Init(size))
return NULL;
return buffer->GetReference();
}
bool IsBuffer(PP_Resource resource) {
return !!Resource::GetAs<Buffer>(resource);
}
bool Describe(PP_Resource resource, int32_t* size_in_bytes) {
scoped_refptr<Buffer> buffer(Resource::GetAs<Buffer>(resource));
if (!buffer)
return false;
buffer->Describe(size_in_bytes);
return true;
}
void* Map(PP_Resource resource) {
scoped_refptr<Buffer> buffer(Resource::GetAs<Buffer>(resource));
if (!buffer)
return NULL;
return buffer->Map();
}
void Unmap(PP_Resource resource) {
scoped_refptr<Buffer> buffer(Resource::GetAs<Buffer>(resource));
if (!buffer)
return;
return buffer->Unmap();
}
const PPB_Buffer ppb_buffer = {
&Create,
&IsBuffer,
&Describe,
&Map,
&Unmap,
};
} // namespace
Buffer::Buffer(PluginModule* module)
: Resource(module),
size_(0) {
}
Buffer::~Buffer() {
}
// static
const PPB_Buffer* Buffer::GetInterface() {
return &ppb_buffer;
}
bool Buffer::Init(int size) {
if (size == 0)
return false;
Unmap();
size_ = size;
return true;
}
void Buffer::Describe(int* size_in_bytes) const {
*size_in_bytes = size_;
}
void* Buffer::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 Buffer::Unmap() {
mem_buffer_.reset();
}
void Buffer::Swap(Buffer* other) {
swap(other->mem_buffer_, mem_buffer_);
std::swap(other->size_, size_);
}
} // namespace pepper
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