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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:
* Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
* Alexandros Frantzis <alexandros.frantzis@canonical.com>
*/
#include "gbm_buffer.h"
#include "buffer_texture_binder.h"
#include "native_buffer.h"
#include "gbm_format_conversions.h"
#include <fcntl.h>
#include <xf86drm.h>
#include <boost/throw_exception.hpp>
#include <system_error>
namespace mg=mir::graphics;
namespace mgm=mir::graphics::mesa;
namespace mgc = mir::graphics::common;
namespace geom=mir::geometry;
mgm::GBMBuffer::GBMBuffer(std::shared_ptr<gbm_bo> const& handle,
uint32_t bo_flags,
std::unique_ptr<mgc::BufferTextureBinder> texture_binder)
: gbm_handle{handle},
bo_flags{bo_flags},
texture_binder{std::move(texture_binder)},
prime_fd{-1}
{
auto device = gbm_bo_get_device(gbm_handle.get());
auto gem_handle = gbm_bo_get_handle(gbm_handle.get()).u32;
auto drm_fd = gbm_device_get_fd(device);
auto ret = drmPrimeHandleToFD(drm_fd, gem_handle, DRM_CLOEXEC, &prime_fd);
if (ret)
{
std::string const msg("Failed to get PRIME fd from gbm bo");
BOOST_THROW_EXCEPTION((std::system_error{errno, std::system_category(), msg}));
}
}
mgm::GBMBuffer::~GBMBuffer()
{
if (prime_fd >= 0)
close(prime_fd);
}
geom::Size mgm::GBMBuffer::size() const
{
return {gbm_bo_get_width(gbm_handle.get()), gbm_bo_get_height(gbm_handle.get())};
}
geom::Stride mgm::GBMBuffer::stride() const
{
return geom::Stride(gbm_bo_get_stride(gbm_handle.get()));
}
MirPixelFormat mgm::GBMBuffer::pixel_format() const
{
return gbm_format_to_mir_format(gbm_bo_get_format(gbm_handle.get()));
}
void mgm::GBMBuffer::gl_bind_to_texture()
{
texture_binder->gl_bind_to_texture();
}
std::shared_ptr<mg::NativeBuffer> mgm::GBMBuffer::native_buffer_handle() const
{
auto temp = std::make_shared<NativeBuffer>();
temp->fd_items = 1;
temp->fd[0] = prime_fd;
temp->stride = stride().as_uint32_t();
temp->flags = (bo_flags & GBM_BO_USE_SCANOUT) ? mir_buffer_flag_can_scanout : 0;
temp->bo = gbm_handle.get();
auto const& dim = size();
temp->width = dim.width.as_int();
temp->height = dim.height.as_int();
return temp;
}
mg::NativeBufferBase* mgm::GBMBuffer::native_buffer_base()
{
return this;
}
void mgm::GBMBuffer::secure_for_render()
{
}
void mgm::GBMBuffer::bind()
{
gl_bind_to_texture();
}
void mgm::GBMBuffer::bind_for_write()
{
bind();
}
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