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/*
* Copyright © 2012 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Kevin DuBois<kevin.dubois@canonical.com>
*/
#include "mir/graphics/android/android_native_buffer.h"
#include "mir/graphics/android/sync_fence.h"
#include "gralloc_registrar.h"
#include "mir/client_buffer.h"
#include <boost/throw_exception.hpp>
#include <stdexcept>
namespace mg = mir::graphics;
namespace mga = mir::graphics::android;
namespace mcl = mir::client;
namespace mcla = mir::client::android;
namespace geom = mir::geometry;
namespace
{
struct NativeHandleDeleter
{
NativeHandleDeleter(const std::shared_ptr<const gralloc_module_t>& mod)
: module(mod)
{}
void operator()(const native_handle_t* t)
{
module->unregisterBuffer(module.get(), t);
for (auto i = 0; i < t->numFds; i++)
{
close(t->data[i]);
}
::operator delete(const_cast<native_handle_t*>(t));
}
private:
const std::shared_ptr<const gralloc_module_t> module;
};
}
mcla::GrallocRegistrar::GrallocRegistrar(const std::shared_ptr<const gralloc_module_t>& gr_module) :
gralloc_module(gr_module)
{
}
namespace
{
std::shared_ptr<mg::NativeBuffer> create_native_buffer(
std::shared_ptr<const native_handle_t> const& handle,
std::shared_ptr<mga::Fence> const& fence,
MirBufferPackage const& package,
MirPixelFormat pf)
{
auto ops = std::make_shared<mga::RealSyncFileOps>();
auto anwb = std::shared_ptr<mga::RefCountedNativeBuffer>(
new mga::RefCountedNativeBuffer(handle),
[](mga::RefCountedNativeBuffer* buffer)
{
buffer->mir_dereference();
});
anwb->width = package.width;
anwb->height = package.height;
//note: mir uses stride in bytes, ANativeWindowBuffer needs it in pixel units. some drivers care
//about byte-stride, they will pass stride via ANativeWindowBuffer::handle (which is opaque to us)
anwb->stride = package.stride / MIR_BYTES_PER_PIXEL(pf);
anwb->usage = GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_HW_RENDER;
anwb->handle = handle.get();
return std::make_shared<mga::AndroidNativeBuffer>(anwb, fence, mga::BufferAccess::read);
}
}
std::shared_ptr<mg::NativeBuffer> mcla::GrallocRegistrar::register_buffer(
MirBufferPackage const& package,
MirPixelFormat pf) const
{
bool const fence_present{package.data[0] == static_cast<int>(mga::BufferFlag::fenced)};
int const mir_flag_offset{1};
int native_handle_header_size = sizeof(native_handle_t);
int total_size = sizeof(int) *
(package.fd_items + package.data_items + native_handle_header_size);
native_handle_t* handle = static_cast<native_handle_t*>(::operator new(total_size));
handle->version = native_handle_header_size;
std::shared_ptr<mga::Fence> fence;
if (fence_present)
{
auto ops = std::make_shared<mga::RealSyncFileOps>();
fence = std::make_shared<mga::SyncFence>(ops, mir::Fd(package.fd[0]));
handle->numFds = package.fd_items - 1;
for (auto i = 1; i < handle->numFds; i++)
handle->data[i - 1] = package.fd[i];
}
else
{
auto ops = std::make_shared<mga::RealSyncFileOps>();
fence = std::make_shared<mga::SyncFence>(ops, mir::Fd(mir::Fd::invalid));
handle->numFds = package.fd_items;
for (auto i = 0; i < handle->numFds; i++)
handle->data[i] = package.fd[i];
}
handle->numInts = package.data_items - mir_flag_offset;
for (auto i = 0; i < handle->numInts; i++)
handle->data[handle->numFds+i] = package.data[i + mir_flag_offset];
if (gralloc_module->registerBuffer(gralloc_module.get(), handle))
{
::operator delete(handle);
BOOST_THROW_EXCEPTION(std::runtime_error("error registering graphics buffer for client use\n"));
}
NativeHandleDeleter del(gralloc_module);
return create_native_buffer(std::shared_ptr<const native_handle_t>(handle, del), fence, package, pf);
}
std::shared_ptr<char> mcla::GrallocRegistrar::secure_for_cpu(
std::shared_ptr<mg::NativeBuffer> const& handle,
geometry::Rectangle const rect)
{
char* vaddr;
int usage = GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN;
int width = rect.size.width.as_uint32_t();
int height = rect.size.height.as_uint32_t();
int top = rect.top_left.x.as_uint32_t();
int left = rect.top_left.y.as_uint32_t();
if ( gralloc_module->lock(gralloc_module.get(), handle->handle(),
usage, top, left, width, height, (void**) &vaddr) )
BOOST_THROW_EXCEPTION(std::runtime_error("error securing buffer for client cpu use"));
auto module = gralloc_module;
return std::shared_ptr<char>(vaddr, [module, handle](char*)
{
module->unlock(module.get(), handle->handle());
//we didn't alloc region(just mapped it), so we don't delete
});
}
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