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![Daniel Stone](/assets/img/avatar_default.png)
Most of the state helpers (create, destroy, duplicate, etc) state, are relatively straightforward and can live in a separate file. Signed-off-by: Daniel Stone <daniels@collabora.com>
443 lines
12 KiB
C
443 lines
12 KiB
C
/*
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* Copyright © 2008-2011 Kristian Høgsberg
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* Copyright © 2011 Intel Corporation
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* Copyright © 2017, 2018 Collabora, Ltd.
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* Copyright © 2017, 2018 General Electric Company
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* Copyright (c) 2018 DisplayLink (UK) Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <drm_fourcc.h>
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#include "drm-internal.h"
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/**
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* Allocate a new, empty, plane state.
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*/
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struct drm_plane_state *
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drm_plane_state_alloc(struct drm_output_state *state_output,
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struct drm_plane *plane)
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{
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struct drm_plane_state *state = zalloc(sizeof(*state));
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assert(state);
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state->output_state = state_output;
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state->plane = plane;
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state->in_fence_fd = -1;
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pixman_region32_init(&state->damage);
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/* Here we only add the plane state to the desired link, and not
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* set the member. Having an output pointer set means that the
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* plane will be displayed on the output; this won't be the case
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* when we go to disable a plane. In this case, it must be part of
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* the commit (and thus the output state), but the member must be
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* NULL, as it will not be on any output when the state takes
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* effect.
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*/
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if (state_output)
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wl_list_insert(&state_output->plane_list, &state->link);
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else
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wl_list_init(&state->link);
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return state;
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}
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/**
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* Free an existing plane state. As a special case, the state will not
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* normally be freed if it is the current state; see drm_plane_set_state.
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*/
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void
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drm_plane_state_free(struct drm_plane_state *state, bool force)
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{
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if (!state)
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return;
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wl_list_remove(&state->link);
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wl_list_init(&state->link);
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state->output_state = NULL;
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state->in_fence_fd = -1;
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pixman_region32_fini(&state->damage);
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if (force || state != state->plane->state_cur) {
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drm_fb_unref(state->fb);
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free(state);
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}
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}
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/**
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* Duplicate an existing plane state into a new plane state, storing it within
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* the given output state. If the output state already contains a plane state
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* for the drm_plane referenced by 'src', that plane state is freed first.
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*/
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struct drm_plane_state *
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drm_plane_state_duplicate(struct drm_output_state *state_output,
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struct drm_plane_state *src)
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{
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struct drm_plane_state *dst = malloc(sizeof(*dst));
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struct drm_plane_state *old, *tmp;
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assert(src);
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assert(dst);
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*dst = *src;
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wl_list_init(&dst->link);
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wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
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/* Duplicating a plane state into the same output state, so
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* it can replace itself with an identical copy of itself,
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* makes no sense. */
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assert(old != src);
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if (old->plane == dst->plane)
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drm_plane_state_free(old, false);
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}
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wl_list_insert(&state_output->plane_list, &dst->link);
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if (src->fb)
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dst->fb = drm_fb_ref(src->fb);
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dst->output_state = state_output;
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pixman_region32_init(&dst->damage);
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dst->complete = false;
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return dst;
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}
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/**
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* Remove a plane state from an output state; if the plane was previously
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* enabled, then replace it with a disabling state. This ensures that the
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* output state was untouched from it was before the plane state was
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* modified by the caller of this function.
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*
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* This is required as drm_output_state_get_plane may either allocate a
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* new plane state, in which case this function will just perform a matching
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* drm_plane_state_free, or it may instead repurpose an existing disabling
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* state (if the plane was previously active), in which case this function
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* will reset it.
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*/
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void
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drm_plane_state_put_back(struct drm_plane_state *state)
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{
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struct drm_output_state *state_output;
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struct drm_plane *plane;
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if (!state)
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return;
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state_output = state->output_state;
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plane = state->plane;
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drm_plane_state_free(state, false);
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/* Plane was previously disabled; no need to keep this temporary
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* state around. */
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if (!plane->state_cur->fb)
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return;
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(void) drm_plane_state_alloc(state_output, plane);
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}
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/**
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* Given a weston_view, fill the drm_plane_state's co-ordinates to display on
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* a given plane.
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*/
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bool
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drm_plane_state_coords_for_view(struct drm_plane_state *state,
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struct weston_view *ev)
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{
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struct drm_output *output = state->output;
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struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
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pixman_region32_t dest_rect, src_rect;
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pixman_box32_t *box, tbox;
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float sxf1, syf1, sxf2, syf2;
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if (!drm_view_transform_supported(ev, &output->base))
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return false;
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/* Update the base weston_plane co-ordinates. */
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box = pixman_region32_extents(&ev->transform.boundingbox);
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state->plane->base.x = box->x1;
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state->plane->base.y = box->y1;
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/* First calculate the destination co-ordinates by taking the
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* area of the view which is visible on this output, performing any
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* transforms to account for output rotation and scale as necessary. */
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pixman_region32_init(&dest_rect);
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pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
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&output->base.region);
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pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
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box = pixman_region32_extents(&dest_rect);
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tbox = weston_transformed_rect(output->base.width,
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output->base.height,
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output->base.transform,
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output->base.current_scale,
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*box);
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state->dest_x = tbox.x1;
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state->dest_y = tbox.y1;
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state->dest_w = tbox.x2 - tbox.x1;
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state->dest_h = tbox.y2 - tbox.y1;
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pixman_region32_fini(&dest_rect);
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/* Now calculate the source rectangle, by finding the extents of the
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* view, and working backwards to source co-ordinates. */
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pixman_region32_init(&src_rect);
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pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
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&output->base.region);
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box = pixman_region32_extents(&src_rect);
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weston_view_from_global_float(ev, box->x1, box->y1, &sxf1, &syf1);
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weston_surface_to_buffer_float(ev->surface, sxf1, syf1, &sxf1, &syf1);
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weston_view_from_global_float(ev, box->x2, box->y2, &sxf2, &syf2);
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weston_surface_to_buffer_float(ev->surface, sxf2, syf2, &sxf2, &syf2);
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pixman_region32_fini(&src_rect);
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/* Buffer transforms may mean that x2 is to the left of x1, and/or that
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* y2 is above y1. */
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if (sxf2 < sxf1) {
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double tmp = sxf1;
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sxf1 = sxf2;
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sxf2 = tmp;
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}
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if (syf2 < syf1) {
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double tmp = syf1;
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syf1 = syf2;
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syf2 = tmp;
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}
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/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
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state->src_x = wl_fixed_from_double(sxf1) << 8;
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state->src_y = wl_fixed_from_double(syf1) << 8;
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state->src_w = wl_fixed_from_double(sxf2 - sxf1) << 8;
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state->src_h = wl_fixed_from_double(syf2 - syf1) << 8;
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/* Clamp our source co-ordinates to surface bounds; it's possible
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* for intermediate translations to give us slightly incorrect
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* co-ordinates if we have, for example, multiple zooming
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* transformations. View bounding boxes are also explicitly rounded
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* greedily. */
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if (state->src_x < 0)
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state->src_x = 0;
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if (state->src_y < 0)
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state->src_y = 0;
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if (state->src_w > (uint32_t) ((buffer->width << 16) - state->src_x))
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state->src_w = (buffer->width << 16) - state->src_x;
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if (state->src_h > (uint32_t) ((buffer->height << 16) - state->src_y))
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state->src_h = (buffer->height << 16) - state->src_y;
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return true;
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}
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/**
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* Return a plane state from a drm_output_state.
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*/
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struct drm_plane_state *
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drm_output_state_get_existing_plane(struct drm_output_state *state_output,
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struct drm_plane *plane)
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{
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struct drm_plane_state *ps;
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wl_list_for_each(ps, &state_output->plane_list, link) {
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if (ps->plane == plane)
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return ps;
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}
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return NULL;
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}
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/**
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* Return a plane state from a drm_output_state, either existing or
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* freshly allocated.
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*/
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struct drm_plane_state *
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drm_output_state_get_plane(struct drm_output_state *state_output,
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struct drm_plane *plane)
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{
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struct drm_plane_state *ps;
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ps = drm_output_state_get_existing_plane(state_output, plane);
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if (ps)
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return ps;
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return drm_plane_state_alloc(state_output, plane);
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}
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/**
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* Allocate a new, empty drm_output_state. This should not generally be used
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* in the repaint cycle; see drm_output_state_duplicate.
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*/
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struct drm_output_state *
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drm_output_state_alloc(struct drm_output *output,
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struct drm_pending_state *pending_state)
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{
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struct drm_output_state *state = zalloc(sizeof(*state));
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assert(state);
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state->output = output;
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state->dpms = WESTON_DPMS_OFF;
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state->pending_state = pending_state;
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if (pending_state)
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wl_list_insert(&pending_state->output_list, &state->link);
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else
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wl_list_init(&state->link);
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wl_list_init(&state->plane_list);
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return state;
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}
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/**
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* Duplicate an existing drm_output_state into a new one. This is generally
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* used during the repaint cycle, to capture the existing state of an output
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* and modify it to create a new state to be used.
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*
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* The mode determines whether the output will be reset to an a blank state,
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* or an exact mirror of the current state.
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*/
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struct drm_output_state *
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drm_output_state_duplicate(struct drm_output_state *src,
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struct drm_pending_state *pending_state,
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enum drm_output_state_duplicate_mode plane_mode)
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{
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struct drm_output_state *dst = malloc(sizeof(*dst));
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struct drm_plane_state *ps;
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assert(dst);
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/* Copy the whole structure, then individually modify the
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* pending_state, as well as the list link into our pending
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* state. */
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*dst = *src;
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dst->pending_state = pending_state;
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if (pending_state)
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wl_list_insert(&pending_state->output_list, &dst->link);
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else
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wl_list_init(&dst->link);
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wl_list_init(&dst->plane_list);
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wl_list_for_each(ps, &src->plane_list, link) {
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/* Don't carry planes which are now disabled; these should be
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* free for other outputs to reuse. */
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if (!ps->output)
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continue;
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if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
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(void) drm_plane_state_alloc(dst, ps->plane);
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else
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(void) drm_plane_state_duplicate(dst, ps);
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}
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return dst;
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}
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/**
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* Free an unused drm_output_state.
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*/
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void
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drm_output_state_free(struct drm_output_state *state)
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{
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struct drm_plane_state *ps, *next;
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if (!state)
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return;
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wl_list_for_each_safe(ps, next, &state->plane_list, link)
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drm_plane_state_free(ps, false);
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wl_list_remove(&state->link);
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free(state);
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}
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/**
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* Allocate a new drm_pending_state
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*
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* Allocate a new, empty, 'pending state' structure to be used across a
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* repaint cycle or similar.
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*
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* @param backend DRM backend
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* @returns Newly-allocated pending state structure
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*/
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struct drm_pending_state *
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drm_pending_state_alloc(struct drm_backend *backend)
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{
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struct drm_pending_state *ret;
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ret = calloc(1, sizeof(*ret));
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if (!ret)
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return NULL;
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ret->backend = backend;
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wl_list_init(&ret->output_list);
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return ret;
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}
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/**
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* Free a drm_pending_state structure
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*
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* Frees a pending_state structure, as well as any output_states connected
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* to this pending state.
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*
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* @param pending_state Pending state structure to free
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*/
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void
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drm_pending_state_free(struct drm_pending_state *pending_state)
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{
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struct drm_output_state *output_state, *tmp;
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if (!pending_state)
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return;
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wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
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link) {
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drm_output_state_free(output_state);
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}
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free(pending_state);
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}
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/**
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* Find an output state in a pending state
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*
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* Given a pending_state structure, find the output_state for a particular
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* output.
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*
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* @param pending_state Pending state structure to search
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* @param output Output to find state for
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* @returns Output state if present, or NULL if not
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*/
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struct drm_output_state *
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drm_pending_state_get_output(struct drm_pending_state *pending_state,
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struct drm_output *output)
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{
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struct drm_output_state *output_state;
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wl_list_for_each(output_state, &pending_state->output_list, link) {
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if (output_state->output == output)
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return output_state;
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}
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return NULL;
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}
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