vo_gpu: vulkan: add support for wayland

1 files changed, 146 insertions, 0 deletions

diff --git a/video/out/vulkan/context_wayland.c b/video/out/vulkan/context_wayland.c
new file mode 100644
index 0000000000..a77f17a4f2
--- /dev/null
+++ b/video/out/vulkan/context_wayland.c
@@ -0,0 +1,146 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "video/out/gpu/context.h"
+#include "video/out/wayland_common.h"
+
+#include "common.h"
+#include "context.h"
+#include "utils.h"
+
+struct priv {
+    struct mpvk_ctx vk;
+};
+
+static void wayland_uninit(struct ra_ctx *ctx)
+{
+    struct priv *p = ctx->priv;
+
+    ra_vk_ctx_uninit(ctx);
+    mpvk_uninit(&p->vk);
+    vo_wayland_uninit(ctx->vo);
+}
+
+static bool wayland_init(struct ra_ctx *ctx)
+{
+    struct priv *p = ctx->priv = talloc_zero(ctx, struct priv);
+    struct mpvk_ctx *vk = &p->vk;
+    int msgl = ctx->opts.probing ? MSGL_V : MSGL_ERR;
+
+    if (!mpvk_instance_init(vk, ctx->log, VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME,
+                            ctx->opts.debug))
+        goto error;
+
+    if (!vo_wayland_init(ctx->vo))
+        goto error;
+
+    if (!vo_wayland_config(ctx->vo))
+        goto error;
+
+    VkWaylandSurfaceCreateInfoKHR wlinfo = {
+         .sType   = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR,
+         .display = ctx->vo->wayland->display.display,
+         .surface = ctx->vo->wayland->window.video_surface,
+    };
+
+    VkResult res = vkCreateWaylandSurfaceKHR(vk->inst, &wlinfo, MPVK_ALLOCATOR,
+                                             &vk->surf);
+    if (res != VK_SUCCESS) {
+        MP_MSG(ctx, msgl, "Failed creating Wayland surface: %s\n", vk_err(res));
+        goto error;
+    }
+
+    /* Because in Wayland clients render whenever they receive a callback from
+     * the compositor, and the fact that the compositor usually stops sending
+     * callbacks once the surface is no longer visible, using FIFO here would
+     * mean the entire player would block on acquiring swapchain images. Hence,
+     * use MAILBOX to guarantee that there'll always be a swapchain image and
+     * the player won't block waiting on those */
+    if (!ra_vk_ctx_init(ctx, vk, VK_PRESENT_MODE_MAILBOX_KHR))
+        goto error;
+
+    return true;
+
+error:
+    wayland_uninit(ctx);
+    return false;
+}
+
+static bool resize(struct ra_ctx *ctx)
+{
+    struct vo_wayland_state *wl = ctx->vo->wayland;
+    int32_t width = wl->window.sh_width;
+    int32_t height = wl->window.sh_height;
+    int32_t scale = 1;
+
+    if (wl->display.current_output)
+        scale = wl->display.current_output->scale;
+
+    MP_VERBOSE(wl, "resizing %dx%d -> %dx%d\n", wl->window.width,
+                                                wl->window.height,
+                                                width,
+                                                height);
+
+    wl_surface_set_buffer_scale(wl->window.video_surface, scale);
+    int err = ra_vk_ctx_resize(ctx->swapchain, scale*width, scale*height);
+
+    wl->window.width = width;
+    wl->window.height = height;
+
+    wl->vo->dwidth  = scale*wl->window.width;
+    wl->vo->dheight = scale*wl->window.height;
+    wl->vo->want_redraw = true;
+
+    return err;
+}
+
+static bool wayland_reconfig(struct ra_ctx *ctx)
+{
+    vo_wayland_config(ctx->vo);
+    return resize(ctx);
+}
+
+static int wayland_control(struct ra_ctx *ctx, int *events, int request, void *arg)
+{
+    int ret = vo_wayland_control(ctx->vo, events, request, arg);
+    if (*events & VO_EVENT_RESIZE) {
+        if (!resize(ctx))
+            return VO_ERROR;
+    }
+    return ret;
+}
+
+static void wayland_wakeup(struct ra_ctx *ctx)
+{
+    vo_wayland_wakeup(ctx->vo);
+}
+
+static void wayland_wait_events(struct ra_ctx *ctx, int64_t until_time_us)
+{
+    vo_wayland_wait_events(ctx->vo, until_time_us);
+}
+
+const struct ra_ctx_fns ra_ctx_vulkan_wayland = {
+    .type           = "vulkan",
+    .name           = "wayland",
+    .reconfig       = wayland_reconfig,
+    .control        = wayland_control,
+    .wakeup         = wayland_wakeup,
+    .wait_events    = wayland_wait_events,
+    .init           = wayland_init,
+    .uninit         = wayland_uninit,
+};