1// Copyright (C) 2018 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4#ifndef LINUXDMABUF_H
5#define LINUXDMABUF_H
6
7#include "qwayland-server-linux-dmabuf-unstable-v1.h"
8
9#include <QtWaylandCompositor/private/qwayland-server-wayland.h>
10#include <QtWaylandCompositor/private/qwlclientbufferintegration_p.h>
11
12#include <QtOpenGL/QOpenGLTexture>
13#include <QtCore/QObject>
14#include <QtCore/QHash>
15#include <QtCore/QSize>
16#include <QtCore/QTextStream>
17
18#include <array>
19#include <QtGui/QOpenGLContext>
20#include <QtCore/QMutex>
21
22#include <EGL/egl.h>
23#include <EGL/eglext.h>
24
25// compatibility with libdrm <= 2.4.74
26#ifndef DRM_FORMAT_RESERVED
27#define DRM_FORMAT_RESERVED ((1ULL << 56) - 1)
28#endif
29#ifndef DRM_FORMAT_MOD_VENDOR_NONE
30#define DRM_FORMAT_MOD_VENDOR_NONE 0
31#endif
32#ifndef DRM_FORMAT_MOD_LINEAR
33#define DRM_FORMAT_MOD_LINEAR fourcc_mod_code(NONE, 0)
34#endif
35#ifndef DRM_FORMAT_MOD_INVALID
36#define DRM_FORMAT_MOD_INVALID fourcc_mod_code(NONE, DRM_FORMAT_RESERVED)
37#endif
38
39// Copied from eglmesaext.h
40#ifndef EGL_WL_bind_wayland_display
41typedef EGLBoolean (EGLAPIENTRYP PFNEGLBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
42typedef EGLBoolean (EGLAPIENTRYP PFNEGLUNBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
43#endif
44
45QT_BEGIN_NAMESPACE
46
47class QWaylandCompositor;
48class QWaylandResource;
49class LinuxDmabufParams;
50class LinuxDmabufClientBufferIntegration;
51
52struct Plane {
53 int fd = -1;
54 uint32_t offset = 0;
55 uint32_t stride = 0;
56 uint64_t modifiers = 0;
57};
58
59class LinuxDmabuf : public QtWaylandServer::zwp_linux_dmabuf_v1
60{
61public:
62 explicit LinuxDmabuf(wl_display *display, LinuxDmabufClientBufferIntegration *clientBufferIntegration);
63
64 void setSupportedModifiers(const QHash<uint32_t, QList<uint64_t>> &modifiers);
65
66protected:
67 void zwp_linux_dmabuf_v1_bind_resource(Resource *resource) override;
68 void zwp_linux_dmabuf_v1_create_params(Resource *resource, uint32_t params_id) override;
69
70private:
71 QHash<uint32_t, QList<uint64_t>> m_modifiers; // key=DRM format, value=supported DRM modifiers for format
72 LinuxDmabufClientBufferIntegration *m_clientBufferIntegration;
73};
74
75class LinuxDmabufParams : public QtWaylandServer::zwp_linux_buffer_params_v1
76{
77public:
78 explicit LinuxDmabufParams(LinuxDmabufClientBufferIntegration *clientBufferIntegration, wl_resource *resource);
79 ~LinuxDmabufParams() override;
80
81private:
82 bool handleCreateParams(Resource *resource, int width, int height, uint format, uint flags);
83 uint m_drmFormat = 0;
84 uint m_flags = 0;
85 QSize m_size;
86 bool m_used = false;
87 QMap<uint, Plane> m_planes;
88 LinuxDmabufClientBufferIntegration *m_clientBufferIntegration;
89
90protected:
91 void zwp_linux_buffer_params_v1_destroy(Resource *resource) override;
92 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;
93 void zwp_linux_buffer_params_v1_create(Resource *resource, int32_t width, int32_t height, uint32_t format, uint32_t flags) override;
94 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;
95 void zwp_linux_buffer_params_v1_destroy_resource(Resource *resource) override;
96
97 friend class LinuxDmabufClientBufferIntegrationPrivate;
98};
99
100class LinuxDmabufWlBuffer : public QtWaylandServer::wl_buffer
101{
102public:
103 explicit LinuxDmabufWlBuffer(::wl_client *client, LinuxDmabufClientBufferIntegration *clientBufferIntegration, uint id = 0);
104 ~LinuxDmabufWlBuffer() override;
105
106 void initImage(uint32_t plane, EGLImageKHR image);
107 void initTexture(uint32_t plane, QOpenGLTexture *texture);
108 inline QSize size() const { return m_size; }
109 inline uint32_t flags() const { return m_flags; }
110 inline uint32_t drmFormat() const { return m_drmFormat; }
111 inline Plane& plane(uint index) { return m_planes.at(n: index); }
112 inline uint32_t planesNumber() const { return m_planesNumber; }
113 inline EGLImageKHR image(uint32_t plane) { return m_eglImages.at(n: plane); }
114 inline QOpenGLTexture *texture(uint32_t plane) const { return m_textures.at(n: plane); }
115 void buffer_destroy_resource(Resource *resource) override;
116
117 static const uint32_t MaxDmabufPlanes = 4;
118
119private:
120 QSize m_size;
121 uint32_t m_flags = 0;
122 uint32_t m_drmFormat = EGL_TEXTURE_RGBA;
123 std::array<Plane, MaxDmabufPlanes> m_planes;
124 uint32_t m_planesNumber = 1;
125 LinuxDmabufClientBufferIntegration *m_clientBufferIntegration = nullptr;
126 std::array<EGLImageKHR, MaxDmabufPlanes> m_eglImages = { ._M_elems: {EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR, EGL_NO_IMAGE_KHR} };
127 std::array<QOpenGLTexture *, MaxDmabufPlanes> m_textures = { ._M_elems: {nullptr, nullptr, nullptr, nullptr} };
128 std::array<QOpenGLContext *, MaxDmabufPlanes> m_texturesContext = { ._M_elems: {nullptr, nullptr, nullptr, nullptr} };
129 std::array<QMetaObject::Connection, MaxDmabufPlanes> m_texturesAboutToBeDestroyedConnection = { ._M_elems: {QMetaObject::Connection(), QMetaObject::Connection(), QMetaObject::Connection(), QMetaObject::Connection()} };
130 QMutex m_texturesLock;
131
132 void freeResources();
133 void buffer_destroy(Resource *resource) override;
134
135 friend class LinuxDmabufParams;
136};
137
138QT_END_NAMESPACE
139
140#endif // LINUXDMABUF_H
141

source code of qtwayland/src/hardwareintegration/compositor/linux-dmabuf-unstable-v1/linuxdmabuf.h