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// Copyright (C) 2026 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
// Qt-Security score:critical reason:network-protocol
#ifndef LINUXDMABUF_H
#define LINUXDMABUF_H
#include "qwayland-server-linux-dmabuf-v1.h"
#include <QtWaylandCompositor/private/qwayland-server-wayland.h>
#include <QtWaylandCompositor/private/qwlclientbufferintegration_p.h>
#include <QtOpenGL/QOpenGLTexture>
#include <QtCore/QObject>
#include <QtCore/QHash>
#include <QtCore/QSize>
#include <QtCore/QTextStream>
#include <QtCore/QTemporaryFile>
#include <array>
#include <QtGui/QOpenGLContext>
#include <QtCore/QMutex>
#include <EGL/egl.h>
#include <EGL/eglext.h>
// compatibility with libdrm <= 2.4.74
#ifndef DRM_FORMAT_RESERVED
#define DRM_FORMAT_RESERVED ((1ULL << 56) - 1)
#endif
#ifndef DRM_FORMAT_MOD_VENDOR_NONE
#define DRM_FORMAT_MOD_VENDOR_NONE 0
#endif
#ifndef DRM_FORMAT_MOD_LINEAR
#define DRM_FORMAT_MOD_LINEAR fourcc_mod_code(NONE, 0)
#endif
#ifndef DRM_FORMAT_MOD_INVALID
#define DRM_FORMAT_MOD_INVALID fourcc_mod_code(NONE, DRM_FORMAT_RESERVED)
#endif
#ifndef EGL_DRM_RENDER_NODE_FILE_EXT
# define EGL_DRM_RENDER_NODE_FILE_EXT 0x3377
#endif
// Copied from eglmesaext.h
#ifndef EGL_WL_bind_wayland_display
typedef EGLBoolean (EGLAPIENTRYP PFNEGLBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
typedef EGLBoolean (EGLAPIENTRYP PFNEGLUNBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
#endif
QT_BEGIN_NAMESPACE
class QWaylandCompositor;
class QWaylandResource;
class LinuxDmabufParams;
class LinuxDmabufFeedback;
class LinuxDmabufClientBufferIntegration;
struct Plane {
int fd = -1;
uint32_t offset = 0;
uint32_t stride = 0;
uint64_t modifiers = 0;
};
class LinuxDmabuf : public QtWaylandServer::zwp_linux_dmabuf_v1
{
public:
explicit LinuxDmabuf(int version,
wl_display *display,
LinuxDmabufClientBufferIntegration *clientBufferIntegration);
void setSupportedModifiers(const QHash<uint32_t, QList<uint64_t>> &modifiers);
void setDrmDevice(const char *drmDevice);
protected:
void zwp_linux_dmabuf_v1_bind_resource(Resource *resource) override;
void zwp_linux_dmabuf_v1_create_params(Resource *resource, uint32_t params_id) override;
void zwp_linux_dmabuf_v1_get_default_feedback(Resource *resource, uint32_t id) override;
void zwp_linux_dmabuf_v1_get_surface_feedback(Resource *resource, uint32_t id, struct ::wl_resource *surface) override;
private:
QHash<uint32_t, QList<uint64_t>> m_modifiers; // key=DRM format, value=supported DRM modifiers for format
LinuxDmabufClientBufferIntegration *m_clientBufferIntegration = nullptr;
const char *m_drmDevice = nullptr;
};
class LinuxDmabufFeedback : public QtWaylandServer::zwp_linux_dmabuf_feedback_v1
{
public:
explicit LinuxDmabufFeedback(QHash<uint32_t, QList<uint64_t>> modifiers, const char *drmDevice,
wl_resource *resource);
~LinuxDmabufFeedback() override;
protected:
void zwp_linux_dmabuf_feedback_v1_bind_resource(Resource *resource) override;
void zwp_linux_dmabuf_feedback_v1_destroy_resource(Resource *resource) override;
void zwp_linux_dmabuf_feedback_v1_destroy(Resource *resource) override;
private:
QByteArray sendFormatTable(Resource *resource);
void sendFeedback(Resource *resource);
QHash<uint32_t, QList<uint64_t>> m_modifiers;
const char *m_drmDevice;
uchar *m_data = nullptr;
qsizetype m_size = 0;
};
class LinuxDmabufParams : public QtWaylandServer::zwp_linux_buffer_params_v1
{
public:
explicit LinuxDmabufParams(LinuxDmabufClientBufferIntegration *clientBufferIntegration, wl_resource *resource);
~LinuxDmabufParams() override;
private:
bool handleCreateParams(Resource *resource, int width, int height, uint format, uint flags);
uint m_drmFormat = 0;
uint m_flags = 0;
QSize m_size;
bool m_used = false;
QMap<uint, Plane> m_planes;
LinuxDmabufClientBufferIntegration *m_clientBufferIntegration;
protected:
void zwp_linux_buffer_params_v1_destroy(Resource *resource) override;
void zwp_linux_buffer_params_v1_add(Resource *resource, int32_t fd, uint32_t plane_idx, uint32_t offset, uint32_t stride, uint32_t modifier_hi, uint32_t modifier_lo) override;
void zwp_linux_buffer_params_v1_create(Resource *resource, int32_t width, int32_t height, uint32_t format, uint32_t flags) override;
void zwp_linux_buffer_params_v1_create_immed(Resource *resource, uint32_t buffer_id, int32_t width, int32_t height, uint32_t format, uint32_t flags) override;
void zwp_linux_buffer_params_v1_destroy_resource(Resource *resource) override;
friend class LinuxDmabufClientBufferIntegrationPrivate;
};
class LinuxDmabufWlBuffer : public QtWaylandServer::wl_buffer
{
public:
explicit LinuxDmabufWlBuffer(::wl_client *client, LinuxDmabufClientBufferIntegration *clientBufferIntegration, uint id = 0);
~LinuxDmabufWlBuffer() override;
void initImage(uint32_t plane, EGLImageKHR image);
void initTexture(uint32_t plane, QOpenGLTexture *texture);
inline QSize size() const { return m_size; }
inline uint32_t flags() const { return m_flags; }
inline uint32_t drmFormat() const { return m_drmFormat; }
inline Plane& plane(uint index) { return m_planes.at(index); }
inline uint32_t planesNumber() const { return m_planesNumber; }
inline EGLImageKHR image(uint32_t plane) { return m_eglImages.at(plane); }
inline QOpenGLTexture *texture(uint32_t plane) const { return m_textures.at(plane); }
void buffer_destroy_resource(Resource *resource) override;
static const uint32_t MaxDmabufPlanes = 4;
private:
QSize m_size;
uint32_t m_flags = 0;
uint32_t m_drmFormat = EGL_TEXTURE_RGBA;
std::array<Plane, MaxDmabufPlanes> m_planes;
uint32_t m_planesNumber = 1;
LinuxDmabufClientBufferIntegration *m_clientBufferIntegration = nullptr;
std::array<EGLImageKHR, MaxDmabufPlanes> m_eglImages = { {EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR} };
std::array<QOpenGLTexture *, MaxDmabufPlanes> m_textures = { {nullptr, nullptr, nullptr, nullptr} };
std::array<QOpenGLContext *, MaxDmabufPlanes> m_texturesContext = { {nullptr, nullptr, nullptr, nullptr} };
std::array<QMetaObject::Connection, MaxDmabufPlanes> m_texturesAboutToBeDestroyedConnection = { {QMetaObject::Connection(), QMetaObject::Connection(), QMetaObject::Connection(), QMetaObject::Connection()} };
QMutex m_texturesLock;
void buffer_destroy(Resource *resource) override;
void deleteTextures();
friend class LinuxDmabufParams;
};
QT_END_NAMESPACE
#endif // LINUXDMABUF_H