2bff90976e
Summary: Source code reorganization: The base class AbstractBackend got renamed to Platform, thus the "backends" are "platforms" now. As they are plugins they should go together with other KWin plugins which are nowadays in the folder plugins. So new location is plugins/platforms/ Reviewers: #plasma, sebas Subscribers: plasma-devel Projects: #plasma Differential Revision: https://phabricator.kde.org/D1353
138 lines
3.8 KiB
C++
138 lines
3.8 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "drm_buffer.h"
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#include "drm_backend.h"
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#include "logging.h"
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// system
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#include <sys/mman.h>
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// drm
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#include <xf86drm.h>
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#if HAVE_GBM
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#include <gbm.h>
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#endif
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namespace KWin
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{
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DrmBuffer::DrmBuffer(DrmBackend *backend, const QSize &size)
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: m_backend(backend)
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, m_size(size)
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{
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drm_mode_create_dumb createArgs;
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memset(&createArgs, 0, sizeof createArgs);
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createArgs.bpp = 32;
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createArgs.width = size.width();
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createArgs.height = size.height();
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) {
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return;
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}
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m_handle = createArgs.handle;
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m_bufferSize = createArgs.size;
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m_stride = createArgs.pitch;
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drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32,
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m_stride, createArgs.handle, &m_bufferId);
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}
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#if HAVE_GBM
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static void gbmCallback(gbm_bo *bo, void *data)
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{
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DrmBackend *backend = reinterpret_cast<DrmBackend*>(data);
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const auto &buffers = backend->buffers();
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for (auto buffer: buffers) {
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if (buffer->gbm() == bo) {
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delete buffer;
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return;
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}
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}
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}
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#endif
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DrmBuffer::DrmBuffer(DrmBackend *backend, gbm_surface *surface)
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: m_backend(backend)
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, m_surface(surface)
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{
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#if HAVE_GBM
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m_bo = gbm_surface_lock_front_buffer(surface);
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if (!m_bo) {
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qCWarning(KWIN_DRM) << "Locking front buffer failed";
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return;
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}
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m_size = QSize(gbm_bo_get_width(m_bo), gbm_bo_get_height(m_bo));
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m_stride = gbm_bo_get_stride(m_bo);
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if (drmModeAddFB(m_backend->fd(), m_size.width(), m_size.height(), 24, 32, m_stride, gbm_bo_get_handle(m_bo).u32, &m_bufferId) != 0) {
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qCWarning(KWIN_DRM) << "drmModeAddFB failed";
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}
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gbm_bo_set_user_data(m_bo, m_backend, gbmCallback);
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#endif
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}
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DrmBuffer::~DrmBuffer()
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{
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m_backend->bufferDestroyed(this);
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delete m_image;
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if (m_memory) {
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munmap(m_memory, m_bufferSize);
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}
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if (m_bufferId) {
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drmModeRmFB(m_backend->fd(), m_bufferId);
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}
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if (m_handle) {
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drm_mode_destroy_dumb destroyArgs;
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destroyArgs.handle = m_handle;
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drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs);
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}
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releaseGbm();
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}
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bool DrmBuffer::map(QImage::Format format)
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{
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if (!m_handle || !m_bufferId) {
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return false;
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}
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drm_mode_map_dumb mapArgs;
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memset(&mapArgs, 0, sizeof mapArgs);
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mapArgs.handle = m_handle;
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) {
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return false;
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}
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void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset);
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if (address == MAP_FAILED) {
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return false;
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}
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m_memory = address;
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m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format);
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return !m_image->isNull();
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}
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void DrmBuffer::releaseGbm()
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{
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#if HAVE_GBM
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if (m_bo) {
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gbm_surface_release_buffer(m_surface, m_bo);
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m_bo = nullptr;
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}
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#endif
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}
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}
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