2 * Copyright (c) 2017-2019, 2021 Arm Limited.
4 * SPDX-License-Identifier: MIT
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 #include "wl_helpers.hpp"
33 #include "wl_object_owner.hpp"
35 #include "util/log.hpp"
39 util::vector<drm_format_pair> *formats{nullptr};
40 bool is_out_of_memory{false};
45 /* Handler for format event of the zwp_linux_dmabuf_v1 interface. */
46 extern "C" void dma_buf_format_handler(void *data,
47 struct zwp_linux_dmabuf_v1 *dma_buf,
48 uint32_t drm_format) {}
50 /* Handler for modifier event of the zwp_linux_dmabuf_v1 interface. */
51 extern "C" void dma_buf_modifier_handler(void *data,
52 struct zwp_linux_dmabuf_v1 *dma_buf,
53 uint32_t drm_format, uint32_t modifier_hi,
54 uint32_t modifier_low)
56 auto *drm_supported_formats = reinterpret_cast<formats_vector *>(data);
58 drm_format_pair format = {};
59 format.fourcc = drm_format;
60 format.modifier = (static_cast<uint64_t>(modifier_hi) << 32) | modifier_low;
62 if (!drm_supported_formats->formats->try_push_back(format))
64 drm_supported_formats->is_out_of_memory = true;
69 VkResult get_supported_formats_and_modifiers(
70 wl_display* display, zwp_linux_dmabuf_v1 *dmabuf_interface,
71 util::vector<drm_format_pair> &supported_formats)
73 formats_vector drm_supported_formats;
74 drm_supported_formats.formats = &supported_formats;
76 const zwp_linux_dmabuf_v1_listener dma_buf_listener = {
77 .format = dma_buf_format_handler, .modifier = dma_buf_modifier_handler,
79 int res = zwp_linux_dmabuf_v1_add_listener(dmabuf_interface, &dma_buf_listener,
80 &drm_supported_formats);
83 WSI_LOG_ERROR("Failed to add zwp_linux_dmabuf_v1 listener.");
84 return VK_ERROR_UNKNOWN;
87 /* Get all modifier events. */
88 res = wl_display_roundtrip(display);
91 WSI_LOG_ERROR("Roundtrip failed.");
92 return VK_ERROR_UNKNOWN;
95 if (drm_supported_formats.is_out_of_memory)
97 WSI_LOG_ERROR("Host got out of memory.");
98 return VK_ERROR_OUT_OF_HOST_MEMORY;
106 void registry_handler(void *data, struct wl_registry *wl_registry, uint32_t name, const char *interface,
109 auto dmabuf_interface = reinterpret_cast<wsi::wayland::zwp_linux_dmabuf_v1_owner* >(data);
111 if (!strcmp(interface, "zwp_linux_dmabuf_v1"))
113 version = ZWP_LINUX_DMABUF_V1_MODIFIER_SINCE_VERSION;
114 zwp_linux_dmabuf_v1 *dmabuf_interface_obj =
115 reinterpret_cast<zwp_linux_dmabuf_v1 *>(wl_registry_bind(
116 wl_registry, name, &zwp_linux_dmabuf_v1_interface, version));
118 if (dmabuf_interface_obj == nullptr)
120 WSI_LOG_ERROR("Failed to get zwp_linux_dmabuf_v1 interface.");
124 dmabuf_interface->reset(dmabuf_interface_obj);
128 int dispatch_queue(struct wl_display *display, struct wl_event_queue *queue, int timeout)
131 struct pollfd pfd = {};
134 /* Before we sleep, dispatch any pending events. prepare_read_queue will return 0 whilst there are pending
135 * events to dispatch on the queue. */
136 while (0 != wl_display_prepare_read_queue(display, queue))
138 /* dispatch_queue_pending returns -1 on error, or the number of events dispatched otherwise. If we
139 * already dispatched some events, then we might not need to sleep, as we might have just dispatched
140 * the event we want, so return immediately. */
141 err = wl_display_dispatch_queue_pending(display, queue);
144 return (0 > err) ? -1 : 1;
148 /* wl_display_read_events performs a non-blocking read. */
149 pfd.fd = wl_display_get_fd(display);
153 /* Timeout is given in milliseconds. A return value of 0, or -1 with errno set to EINTR means that we
154 * should retry as the timeout was exceeded or we were interrupted by a signal, respectively. A
155 * return value of 1 means that something happened, and we should inspect the pollfd structure to see
156 * just what that was.
158 err = poll(&pfd, 1, timeout);
162 wl_display_cancel_read(display);
169 /* Interrupted by a signal; restart. This resets the timeout. */
174 /* Something else bad happened; abort. */
175 wl_display_cancel_read(display);
181 if (POLLIN == pfd.revents)
183 /* We have data to read, and no errors; proceed to read_events. */
188 /* An error occurred, e.g. file descriptor was closed from underneath us. */
189 wl_display_cancel_read(display);
195 /* Actually read the events from the display. A failure in read_events calls cancel_read internally for us,
196 * so we don't need to do that here. */
197 err = wl_display_read_events(display);
203 /* Finally, if we read any events relevant to our queue, we can dispatch them. */
204 err = wl_display_dispatch_queue_pending(display, queue);
205 retval = err < 0 ? -1 : 1;