Move drm_assign_planes into two functions: one which proposes a plane configuration, and another which applies that state to the Weston internal structures. This will be used to try multiple configurations and see which is supported.
Signed-off-by: Daniel Stone <dani...@collabora.com> Differential Revision: https://phabricator.freedesktop.org/D1529 --- libweston/compositor-drm.c | 106 ++++++++++++++++++++++++++++++--------------- 1 file changed, 72 insertions(+), 34 deletions(-) diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c index 79f2941..be2b4ea 100644 --- a/libweston/compositor-drm.c +++ b/libweston/compositor-drm.c @@ -293,6 +293,8 @@ struct drm_plane_state { struct drm_fb *fb; + struct weston_view *ev; /**< maintained for drm_assign_planes only */ + int32_t src_x, src_y; uint32_t src_w, src_h; uint32_t dest_x, dest_y; @@ -1685,6 +1687,7 @@ drm_output_prepare_scanout_view(struct drm_output_state *output_state, } state->fb = fb; + state->ev = ev; state->output = output; drm_plane_state_coords_for_view(state, ev); @@ -2426,6 +2429,7 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state, } state->fb = fb; + state->ev = ev; state->output = output; drm_plane_state_coords_for_view(state, ev); @@ -2562,6 +2566,7 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state, } output->cursor_view = ev; + plane_state->ev = ev; plane_state->fb = drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]); @@ -2629,16 +2634,14 @@ err: drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0); } -static void -drm_assign_planes(struct weston_output *output_base) +static struct drm_output_state * +drm_output_propose_state(struct weston_output *output_base) { - struct drm_backend *b = to_drm_backend(output_base->compositor); struct drm_output *output = to_drm_output(output_base); struct drm_output_state *state; - struct drm_plane_state *plane_state; struct weston_view *ev; pixman_region32_t surface_overlap, renderer_region; - struct weston_plane *primary, *next_plane; + struct weston_plane *primary = &output_base->compositor->primary_plane; assert(!output->state_last); assert(!output->state_pending); @@ -2659,35 +2662,21 @@ drm_assign_planes(struct weston_output *output_base) * as we do for flipping full screen surfaces. */ pixman_region32_init(&renderer_region); - primary = &output_base->compositor->primary_plane; wl_list_for_each(ev, &output_base->compositor->view_list, link) { - struct weston_surface *es = ev->surface; - - /* Test whether this buffer can ever go into a plane: - * non-shm, or small enough to be a cursor. - * - * Also, keep a reference when using the pixman renderer. - * That makes it possible to do a seamless switch to the GL - * renderer and since the pixman renderer keeps a reference - * to the buffer anyway, there is no side effects. - */ - if (b->use_pixman || - (es->buffer_ref.buffer && - (!wl_shm_buffer_get(es->buffer_ref.buffer->resource) || - (ev->surface->width <= b->cursor_width && - ev->surface->height <= b->cursor_height)))) - es->keep_buffer = true; - else - es->keep_buffer = false; + struct weston_plane *next_plane = NULL; + /* Since we process views from top to bottom, we know that if + * the view intersects the calculated renderer region, it must + * be part of, or occluded by, it, and cannot go on a plane. */ pixman_region32_init(&surface_overlap); pixman_region32_intersect(&surface_overlap, &renderer_region, &ev->transform.boundingbox); - next_plane = NULL; if (pixman_region32_not_empty(&surface_overlap)) next_plane = primary; + pixman_region32_fini(&surface_overlap); + if (next_plane == NULL) next_plane = drm_output_prepare_cursor_view(state, ev); if (next_plane == NULL) @@ -2697,17 +2686,69 @@ drm_assign_planes(struct weston_output *output_base) if (next_plane == NULL) next_plane = primary; - weston_view_move_to_plane(ev, next_plane); - if (next_plane == primary) pixman_region32_union(&renderer_region, &renderer_region, &ev->transform.boundingbox); + } + pixman_region32_fini(&renderer_region); + + return state; +} + +static void +drm_assign_planes(struct weston_output *output_base) +{ + struct drm_backend *b = to_drm_backend(output_base->compositor); + struct drm_output *output = to_drm_output(output_base); + struct drm_output_state *state; + struct drm_plane_state *plane_state; + struct weston_view *ev; + struct weston_plane *primary = &output_base->compositor->primary_plane; + + state = drm_output_propose_state(output_base); + + wl_list_for_each(ev, &output_base->compositor->view_list, link) { + struct drm_plane *target_plane = NULL; + + /* Test whether this buffer can ever go into a plane: + * non-shm, or small enough to be a cursor. + * + * Also, keep a reference when using the pixman renderer. + * That makes it possible to do a seamless switch to the GL + * renderer and since the pixman renderer keeps a reference + * to the buffer anyway, there is no side effects. + */ + if (b->use_pixman || + (ev->surface->buffer_ref.buffer && + (!wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource) || + (ev->surface->width <= b->cursor_width && + ev->surface->height <= b->cursor_height)))) + ev->surface->keep_buffer = true; + else + ev->surface->keep_buffer = false; + + /* This is a bit unpleasant, but lacking a temporary place to + * hang a plane off the view, we have to do a nested walk. + * Our first-order iteration has to be planes rather than + * views, because otherwise we won't reset views which were + * previously on planes to being on the primary plane. */ + wl_list_for_each(plane_state, &state->plane_list, link) { + if (plane_state->ev == ev) { + plane_state->ev = NULL; + target_plane = plane_state->plane; + break; + } + } + + if (target_plane) + weston_view_move_to_plane(ev, &target_plane->base); + else + weston_view_move_to_plane(ev, primary); - if (next_plane == primary || - (output->cursor_plane && - next_plane == &output->cursor_plane->base)) { - /* cursor plane involves a copy */ + if (!target_plane || + target_plane->type == WDRM_PLANE_TYPE_CURSOR) { + /* cursor plane & renderer involve a copy */ ev->psf_flags = 0; } else { /* All other planes are a direct scanout of a @@ -2715,10 +2756,7 @@ drm_assign_planes(struct weston_output *output_base) */ ev->psf_flags = WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY; } - - pixman_region32_fini(&surface_overlap); } - pixman_region32_fini(&renderer_region); /* We rely on ev->cursor_view being both an accurate reflection of the * cursor plane's state, but also being maintained across repaints to -- 2.9.3 _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/wayland-devel