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// Copyright (c) 2009 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 "app/surface/transport_dib.h"
#include <unistd.h>
#include <sys/stat.h>
#include "base/eintr_wrapper.h"
#include "base/logging.h"
#include "base/scoped_ptr.h"
#include "base/shared_memory.h"
#include "skia/ext/platform_canvas.h"
TransportDIB::TransportDIB()
: size_(0) {
}
TransportDIB::TransportDIB(TransportDIB::Handle dib)
: shared_memory_(dib, false /* read write */),
size_(0) {
}
TransportDIB::~TransportDIB() {
}
// static
TransportDIB* TransportDIB::Create(size_t size, uint32 sequence_num) {
TransportDIB* dib = new TransportDIB;
if (!dib->shared_memory_.Create("", false /* read write */,
false /* do not open existing */, size)) {
delete dib;
return NULL;
}
if (!dib->shared_memory_.Map(size)) {
delete dib;
return NULL;
}
dib->size_ = size;
return dib;
}
// static
TransportDIB* TransportDIB::Map(TransportDIB::Handle handle) {
if (!is_valid(handle))
return NULL;
TransportDIB* dib = new TransportDIB(handle);
struct stat st;
if ((fstat(handle.fd, &st) != 0) ||
(!dib->shared_memory_.Map(st.st_size))) {
delete dib;
if (HANDLE_EINTR(close(handle.fd)) < 0)
PLOG(ERROR) << "close";
return NULL;
}
dib->size_ = st.st_size;
return dib;
}
bool TransportDIB::is_valid(Handle dib) {
return dib.fd >= 0;
}
skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) {
scoped_ptr<skia::PlatformCanvas> canvas(new skia::PlatformCanvas);
if (!canvas->initialize(w, h, true, reinterpret_cast<uint8_t*>(memory())))
return NULL;
return canvas.release();
}
void* TransportDIB::memory() const {
return shared_memory_.memory();
}
TransportDIB::Id TransportDIB::id() const {
return shared_memory_.id();
}
TransportDIB::Handle TransportDIB::handle() const {
return shared_memory_.handle();
}
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