wayland: add support for color-management and color-representation

It's not official yet but both of these protocols are currently the
leading things in terms of color on wayland. Several compositors have
some preliminary support or are working on it. We currently vendor both
of these protocols since they are still a WIP but color management is
pretty important for mpv so it's worth trying to experiment a bit with
it. Both protocols are copy and pasted from an upstream fork*. The main
focus here is on setting colorspaces and hdr metadata, so the compositor
can be aware of what mpv is trying to render.

*: https://gitlab.freedesktop.org/swick/wayland-protocols/-/tree/color-xx/staging/color-management
*: https://gitlab.freedesktop.org/swick/wayland-protocols/-/tree/color-representation

video/out/meson.build

@@ -7,7 +7,9 @@ protocols = [[wl_protocol_dir, 'stable/presentation-time/presentation-time.xml']
              [wl_protocol_dir, 'unstable/xdg-decoration/xdg-decoration-unstable-v1.xml'],
              [wl_protocol_dir, 'staging/content-type/content-type-v1.xml'],
              [wl_protocol_dir, 'staging/single-pixel-buffer/single-pixel-buffer-v1.xml'],
-             [wl_protocol_dir, 'staging/fractional-scale/fractional-scale-v1.xml']]
+             [wl_protocol_dir, 'staging/fractional-scale/fractional-scale-v1.xml'],
+             ['protocols', 'color-representation-v1.xml'],
+             ['protocols', 'xx-color-management-v4.xml']]
 wl_protocols_source = []
 wl_protocols_headers = []
 

video/out/opengl/context_wayland.c

@@ -67,6 +67,8 @@ static void wayland_egl_swap_buffers(struct ra_ctx *ctx)
     struct priv *p = ctx->priv;
     struct vo_wayland_state *wl = ctx->vo->wl;
 
+    vo_wayland_handle_color(wl);
+
     eglSwapBuffers(p->egl_display, p->egl_surface);
 
     if (!wl->opts->wl_disable_vsync)

video/out/vo_dmabuf_wayland.c

@@ -613,6 +613,7 @@ static void draw_frame(struct vo *vo, struct vo_frame *frame)
         buf = buffer_get(vo, frame);
 
         if (buf && buf->frame) {
+            vo_wayland_handle_color(wl);
             struct mp_image *image = buf->frame->current;
             wl_surface_attach(wl->video_surface, buf->buffer, 0, 0);
             wl_surface_damage_buffer(wl->video_surface, 0, 0, image->w,
@@ -671,6 +672,10 @@ static int reconfig(struct vo *vo, struct mp_image *img)
 {
     struct priv *p = vo->priv;
 
+    mp_mutex_lock(&vo->params_mutex);
+    vo->target_params = &img->params;
+    mp_mutex_unlock(&vo->params_mutex);
+
     if (img->params.force_window) {
         p->force_window = true;
         goto done;

video/out/vo_wlshm.c

@@ -209,6 +209,8 @@ static int resize(struct vo *vo)
     vo->target_params = &p->sws->dst;
     mp_mutex_unlock(&vo->params_mutex);
 
+    vo_wayland_handle_color(wl);
+
     while (p->free_buffers) {
         buf = p->free_buffers;
         p->free_buffers = buf->next;

video/out/vulkan/context_wayland.c

@@ -36,6 +36,8 @@ static void wayland_vk_swap_buffers(struct ra_ctx *ctx)
 {
     struct vo_wayland_state *wl = ctx->vo->wl;
 
+    vo_wayland_handle_color(wl);
+
     if (!wl->opts->wl_disable_vsync)
         vo_wayland_wait_frame(wl);