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316 lines
8.3 KiB
316 lines
8.3 KiB
/*
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* Copyright 2019 Sebastian Wick
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* Copyright 2021 Collabora, 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 <libweston/libweston.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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#include "color.h"
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#include "libweston-internal.h"
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/**
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* Increase reference count of the color profile object
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*
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* \param cprof The color profile. NULL is accepted too.
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* \return cprof.
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*/
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WL_EXPORT struct weston_color_profile *
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weston_color_profile_ref(struct weston_color_profile *cprof)
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{
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/* NULL is a valid color space: sRGB */
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if (!cprof)
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return NULL;
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assert(cprof->ref_count > 0);
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cprof->ref_count++;
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return cprof;
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}
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/**
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* Decrease reference count and potentially destroy the color profile object
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*
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* \param cprof The color profile. NULL is accepted too.
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*/
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WL_EXPORT void
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weston_color_profile_unref(struct weston_color_profile *cprof)
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{
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if (!cprof)
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return;
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assert(cprof->ref_count > 0);
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if (--cprof->ref_count > 0)
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return;
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cprof->cm->destroy_color_profile(cprof);
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}
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/**
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* Get color profile description
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*
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* A description of the profile is meant for human readable logs.
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*
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* \param cprof The color profile, NULL is accepted too.
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* \returns The color profile description, valid as long as the
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* color profile itself is.
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*/
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WL_EXPORT const char *
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weston_color_profile_get_description(struct weston_color_profile *cprof)
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{
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if (cprof)
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return cprof->description;
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else
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return "built-in default sRGB SDR profile";
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}
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/**
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* Initializes a newly allocated color profile object
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*
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* This is used only by color managers. They sub-class weston_color_profile.
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*
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* The reference count starts at 1.
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*
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* To destroy a weston_color_profile, use weston_color_profile_unref().
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*/
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WL_EXPORT void
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weston_color_profile_init(struct weston_color_profile *cprof,
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struct weston_color_manager *cm)
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{
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cprof->cm = cm;
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cprof->ref_count = 1;
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}
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/**
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* Increase reference count of the color transform object
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*
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* \param xform The color transform. NULL is accepted too.
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* \return xform.
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*/
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WL_EXPORT struct weston_color_transform *
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weston_color_transform_ref(struct weston_color_transform *xform)
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{
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/* NULL is a valid color transform: identity */
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if (!xform)
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return NULL;
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assert(xform->ref_count > 0);
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xform->ref_count++;
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return xform;
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}
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/**
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* Decrease and potentially destroy the color transform object
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*
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* \param xform The color transform. NULL is accepted too.
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*/
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WL_EXPORT void
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weston_color_transform_unref(struct weston_color_transform *xform)
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{
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if (!xform)
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return;
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assert(xform->ref_count > 0);
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if (--xform->ref_count > 0)
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return;
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wl_signal_emit(&xform->destroy_signal, xform);
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xform->cm->destroy_color_transform(xform);
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}
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/**
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* Initializes a newly allocated color transform object
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*
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* This is used only by color managers. They sub-class weston_color_transform.
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*
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* The reference count starts at 1.
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*
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* To destroy a weston_color_transform, use weston_color_transfor_unref().
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*/
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WL_EXPORT void
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weston_color_transform_init(struct weston_color_transform *xform,
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struct weston_color_manager *cm)
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{
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xform->cm = cm;
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xform->ref_count = 1;
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wl_signal_init(&xform->destroy_signal);
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}
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/** Deep copy */
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void
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weston_surface_color_transform_copy(struct weston_surface_color_transform *dst,
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const struct weston_surface_color_transform *src)
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{
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*dst = *src;
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dst->transform = weston_color_transform_ref(src->transform);
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}
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/** Unref contents */
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void
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weston_surface_color_transform_fini(struct weston_surface_color_transform *surf_xform)
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{
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weston_color_transform_unref(surf_xform->transform);
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surf_xform->transform = NULL;
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surf_xform->identity_pipeline = false;
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}
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/**
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* Ensure that the surface's color transformation for the given output is
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* populated in the paint nodes for all the views.
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*
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* Creates the color transformation description if necessary by calling
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* into the color manager.
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*
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* \param pnode Paint node defining the surface and the output. All
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* paint nodes with the same surface and output will be ensured.
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*/
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void
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weston_paint_node_ensure_color_transform(struct weston_paint_node *pnode)
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{
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struct weston_surface *surface = pnode->surface;
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struct weston_output *output = pnode->output;
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struct weston_color_manager *cm = surface->compositor->color_manager;
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struct weston_surface_color_transform surf_xform = {};
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struct weston_paint_node *it;
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bool ok;
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/*
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* Invariant: all paint nodes with the same surface+output have the
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* same surf_xform state.
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*/
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if (pnode->surf_xform_valid)
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return;
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ok = cm->get_surface_color_transform(cm, surface, output, &surf_xform);
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wl_list_for_each(it, &surface->paint_node_list, surface_link) {
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if (it->output == output) {
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assert(it->surf_xform_valid == false);
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assert(it->surf_xform.transform == NULL);
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weston_surface_color_transform_copy(&it->surf_xform,
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&surf_xform);
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it->surf_xform_valid = ok;
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}
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}
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weston_surface_color_transform_fini(&surf_xform);
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if (!ok) {
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if (surface->resource)
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wl_resource_post_no_memory(surface->resource);
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weston_log("Failed to create color transformation for a surface.\n");
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}
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}
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/**
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* Load ICC profile file
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*
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* Loads an ICC profile file, ensures it is fit for use, and returns a
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* new reference to the weston_color_profile. Use weston_color_profile_unref()
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* to free it.
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*
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* \param compositor The compositor instance, identifies the color manager.
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* \param path Path to the ICC file to be open()'d.
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* \return A color profile reference, or NULL on failure.
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*
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* Error messages are printed to libweston log.
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*
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* This function is not meant for loading profiles on behalf of Wayland
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* clients.
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*/
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WL_EXPORT struct weston_color_profile *
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weston_compositor_load_icc_file(struct weston_compositor *compositor,
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const char *path)
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{
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struct weston_color_manager *cm = compositor->color_manager;
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struct weston_color_profile *cprof = NULL;
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int fd;
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struct stat icc_stat;
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void *icc_data;
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size_t len;
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char *errmsg = NULL;
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fd = open(path, O_RDONLY);
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if (fd == -1) {
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weston_log("Error: Cannot open ICC profile \"%s\" for reading: %s\n",
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path, strerror(errno));
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return NULL;
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}
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if (fstat(fd, &icc_stat) != 0) {
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weston_log("Error: Cannot fstat ICC profile \"%s\": %s\n",
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path, strerror(errno));
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goto out_close;
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}
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len = icc_stat.st_size;
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if (len < 1) {
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weston_log("Error: ICC profile \"%s\" has no size.\n", path);
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goto out_close;
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}
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icc_data = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
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if (icc_data == MAP_FAILED) {
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weston_log("Error: Cannot mmap ICC profile \"%s\": %s\n",
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path, strerror(errno));
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goto out_close;
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}
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if (!cm->get_color_profile_from_icc(cm, icc_data, len,
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path, &cprof, &errmsg)) {
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weston_log("Error: loading ICC profile \"%s\" failed: %s\n",
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path, errmsg);
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free(errmsg);
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}
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munmap(icc_data, len);
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out_close:
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close(fd);
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return cprof;
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}
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/** Get a string naming the EOTF mode
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*
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* \internal
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*/
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WL_EXPORT const char *
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weston_eotf_mode_to_str(enum weston_eotf_mode e)
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{
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switch (e) {
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case WESTON_EOTF_MODE_NONE: return "(none)";
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case WESTON_EOTF_MODE_SDR: return "SDR";
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case WESTON_EOTF_MODE_TRADITIONAL_HDR: return "traditional gamma HDR";
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case WESTON_EOTF_MODE_ST2084: return "ST2084";
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case WESTON_EOTF_MODE_HLG: return "HLG";
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}
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return "???";
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}
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