457f966bf1
The stride of the mapping is not necessarily the same as the stride of the underlying buffer
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/*
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SPDX-FileCopyrightText: 2023 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "core/graphicsbufferview.h"
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#include "core/graphicsbuffer.h"
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#include "utils/common.h"
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#include <drm_fourcc.h>
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namespace KWin
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{
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static QImage::Format drmFormatToQImageFormat(uint32_t drmFormat)
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{
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switch (drmFormat) {
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#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
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case DRM_FORMAT_ABGR16161616:
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return QImage::Format_RGBA64_Premultiplied;
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case DRM_FORMAT_XBGR16161616:
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return QImage::Format_RGBX64;
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case DRM_FORMAT_ARGB2101010:
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return QImage::Format_A2RGB30_Premultiplied;
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case DRM_FORMAT_XRGB2101010:
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return QImage::Format_RGB30;
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case DRM_FORMAT_ABGR2101010:
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return QImage::Format_A2BGR30_Premultiplied;
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case DRM_FORMAT_XBGR2101010:
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return QImage::Format_BGR30;
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#endif
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case DRM_FORMAT_ARGB8888:
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return QImage::Format_ARGB32_Premultiplied;
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case DRM_FORMAT_XRGB8888:
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return QImage::Format_RGB32;
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default:
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return QImage::Format_Invalid;
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}
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}
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GraphicsBufferView::GraphicsBufferView(GraphicsBuffer *buffer, GraphicsBuffer::MapFlags accessFlags)
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: m_buffer(buffer)
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{
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int width;
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int height;
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int format;
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if (auto dmabuf = buffer->dmabufAttributes()) {
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if (dmabuf->planeCount != 1) {
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return;
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}
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width = dmabuf->width;
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height = dmabuf->height;
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format = dmabuf->format;
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} else if (auto shm = buffer->shmAttributes()) {
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width = shm->size.width();
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height = shm->size.height();
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format = shm->format;
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} else {
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qCWarning(KWIN_CORE) << "Cannot create a graphics buffer view for unknown buffer type" << buffer;
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return;
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}
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const auto [data, stride] = buffer->map(accessFlags);
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if (data) {
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m_image = QImage(static_cast<uchar *>(data), width, height, stride, drmFormatToQImageFormat(format));
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}
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}
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GraphicsBufferView::~GraphicsBufferView()
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{
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if (!m_image.isNull()) {
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m_buffer->unmap();
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}
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}
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bool GraphicsBufferView::isNull() const
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{
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return m_image.isNull();
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}
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QImage *GraphicsBufferView::image()
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{
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return &m_image;
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}
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const QImage *GraphicsBufferView::image() const
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{
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return &m_image;
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}
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} // namespace KWin
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