/* KWin - the KDE window manager This file is part of the KDE project. SPDX-FileCopyrightText: 2015 Martin Gräßlin SPDX-License-Identifier: GPL-2.0-or-later */ #include "drm_buffer.h" #include "logging.h" #include "drm_gpu.h" // system #include // c++ #include // drm #include #include namespace KWin { DrmBuffer:: DrmBuffer(DrmGpu *gpu) : m_gpu(gpu) { } // DrmDumbBuffer DrmDumbBuffer::DrmDumbBuffer(DrmGpu *gpu, const QSize &size) : DrmBuffer(gpu) { m_size = size; drm_mode_create_dumb createArgs; memset(&createArgs, 0, sizeof createArgs); createArgs.bpp = 32; createArgs.width = size.width(); createArgs.height = size.height(); if (drmIoctl(m_gpu->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) { qCWarning(KWIN_DRM) << "DRM_IOCTL_MODE_CREATE_DUMB failed"; return; } m_handle = createArgs.handle; m_bufferSize = createArgs.size; m_stride = createArgs.pitch; if (drmModeAddFB(m_gpu->fd(), size.width(), size.height(), 24, 32, m_stride, createArgs.handle, &m_bufferId) != 0) { qCWarning(KWIN_DRM) << "drmModeAddFB failed with errno" << errno; } } DrmDumbBuffer::~DrmDumbBuffer() { if (m_bufferId) { drmModeRmFB(m_gpu->fd(), m_bufferId); } delete m_image; if (m_memory) { munmap(m_memory, m_bufferSize); } if (m_handle) { drm_mode_destroy_dumb destroyArgs; destroyArgs.handle = m_handle; drmIoctl(m_gpu->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs); } } bool DrmDumbBuffer::needsModeChange(DrmBuffer *b) const { if (DrmDumbBuffer *db = dynamic_cast(b)) { return m_stride != db->stride(); } else { return true; } } bool DrmDumbBuffer::map(QImage::Format format) { if (!m_handle || !m_bufferId) { return false; } drm_mode_map_dumb mapArgs; memset(&mapArgs, 0, sizeof mapArgs); mapArgs.handle = m_handle; if (drmIoctl(m_gpu->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) { return false; } void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_gpu->fd(), mapArgs.offset); if (address == MAP_FAILED) { return false; } m_memory = address; m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format); return !m_image->isNull(); } }