--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Implementation of a scene, a collection of text/image/menu items in an expo
+ *
+ * Copyright 2022 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <expo.h>
+#include <malloc.h>
+#include <mapmem.h>
+#include <video.h>
+#include <video_console.h>
+#include <linux/input.h>
+#include "scene_internal.h"
+
+uint resolve_id(struct expo *exp, uint id)
+{
+ if (!id)
+ id = exp->next_id++;
+ else if (id >= exp->next_id)
+ exp->next_id = id + 1;
+
+ return id;
+}
+
+int scene_new(struct expo *exp, const char *name, uint id, struct scene **scnp)
+{
+ struct scene *scn;
+
+ scn = calloc(1, sizeof(struct scene));
+ if (!scn)
+ return log_msg_ret("expo", -ENOMEM);
+ scn->name = strdup(name);
+ if (!scn->name) {
+ free(scn);
+ return log_msg_ret("name", -ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&scn->obj_head);
+ scn->id = resolve_id(exp, id);
+ scn->expo = exp;
+ list_add_tail(&scn->sibling, &exp->scene_head);
+
+ *scnp = scn;
+
+ return scn->id;
+}
+
+void scene_obj_destroy(struct scene_obj *obj)
+{
+ if (obj->type == SCENEOBJT_MENU)
+ scene_menu_destroy((struct scene_obj_menu *)obj);
+ free(obj->name);
+ free(obj);
+}
+
+void scene_destroy(struct scene *scn)
+{
+ struct scene_obj *obj, *next;
+
+ list_for_each_entry_safe(obj, next, &scn->obj_head, sibling)
+ scene_obj_destroy(obj);
+
+ free(scn->name);
+ free(scn->title);
+ free(scn);
+}
+
+int scene_title_set(struct scene *scn, const char *title)
+{
+ free(scn->title);
+ scn->title = strdup(title);
+ if (!scn->title)
+ return log_msg_ret("tit", -ENOMEM);
+
+ return 0;
+}
+
+int scene_obj_count(struct scene *scn)
+{
+ struct scene_obj *obj;
+ int count = 0;
+
+ list_for_each_entry(obj, &scn->obj_head, sibling)
+ count++;
+
+ return count;
+}
+
+void *scene_obj_find(struct scene *scn, uint id, enum scene_obj_t type)
+{
+ struct scene_obj *obj;
+
+ list_for_each_entry(obj, &scn->obj_head, sibling) {
+ if (obj->id == id &&
+ (type == SCENEOBJT_NONE || obj->type == type))
+ return obj;
+ }
+
+ return NULL;
+}
+
+int scene_obj_add(struct scene *scn, const char *name, uint id,
+ enum scene_obj_t type, uint size, struct scene_obj **objp)
+{
+ struct scene_obj *obj;
+
+ obj = calloc(1, size);
+ if (!obj)
+ return log_msg_ret("obj", -ENOMEM);
+ obj->name = strdup(name);
+ if (!obj->name) {
+ free(obj);
+ return log_msg_ret("name", -ENOMEM);
+ }
+
+ obj->id = resolve_id(scn->expo, id);
+ obj->scene = scn;
+ obj->type = type;
+ list_add_tail(&obj->sibling, &scn->obj_head);
+ *objp = obj;
+
+ return obj->id;
+}
+
+int scene_img(struct scene *scn, const char *name, uint id, char *data,
+ struct scene_obj_img **imgp)
+{
+ struct scene_obj_img *img;
+ int ret;
+
+ ret = scene_obj_add(scn, name, id, SCENEOBJT_IMAGE,
+ sizeof(struct scene_obj_img),
+ (struct scene_obj **)&img);
+ if (ret < 0)
+ return log_msg_ret("obj", -ENOMEM);
+
+ img->data = data;
+
+ if (imgp)
+ *imgp = img;
+
+ return img->obj.id;
+}
+
+int scene_txt(struct scene *scn, const char *name, uint id, uint str_id,
+ struct scene_obj_txt **txtp)
+{
+ struct scene_obj_txt *txt;
+ int ret;
+
+ ret = scene_obj_add(scn, name, id, SCENEOBJT_TEXT,
+ sizeof(struct scene_obj_txt),
+ (struct scene_obj **)&txt);
+ if (ret < 0)
+ return log_msg_ret("obj", -ENOMEM);
+
+ txt->str_id = str_id;
+
+ if (txtp)
+ *txtp = txt;
+
+ return txt->obj.id;
+}
+
+int scene_txt_str(struct scene *scn, const char *name, uint id, uint str_id,
+ const char *str, struct scene_obj_txt **txtp)
+{
+ struct scene_obj_txt *txt;
+ int ret;
+
+ ret = expo_str(scn->expo, name, str_id, str);
+ if (ret < 0)
+ return log_msg_ret("str", ret);
+ else if (ret != str_id)
+ return log_msg_ret("id", -EEXIST);
+
+ ret = scene_obj_add(scn, name, id, SCENEOBJT_TEXT,
+ sizeof(struct scene_obj_txt),
+ (struct scene_obj **)&txt);
+ if (ret < 0)
+ return log_msg_ret("obj", -ENOMEM);
+
+ txt->str_id = str_id;
+
+ if (txtp)
+ *txtp = txt;
+
+ return txt->obj.id;
+}
+
+int scene_txt_set_font(struct scene *scn, uint id, const char *font_name,
+ uint font_size)
+{
+ struct scene_obj_txt *txt;
+
+ txt = scene_obj_find(scn, id, SCENEOBJT_TEXT);
+ if (!txt)
+ return log_msg_ret("find", -ENOENT);
+ txt->font_name = font_name;
+ txt->font_size = font_size;
+
+ return 0;
+}
+
+int scene_obj_set_pos(struct scene *scn, uint id, int x, int y)
+{
+ struct scene_obj *obj;
+
+ obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
+ if (!obj)
+ return log_msg_ret("find", -ENOENT);
+ obj->x = x;
+ obj->y = y;
+ if (obj->type == SCENEOBJT_MENU)
+ scene_menu_arrange(scn, (struct scene_obj_menu *)obj);
+
+ return 0;
+}
+
+int scene_obj_set_hide(struct scene *scn, uint id, bool hide)
+{
+ struct scene_obj *obj;
+
+ obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
+ if (!obj)
+ return log_msg_ret("find", -ENOENT);
+ obj->hide = hide;
+
+ return 0;
+}
+
+int scene_obj_get_hw(struct scene *scn, uint id, int *widthp)
+{
+ struct scene_obj *obj;
+
+ obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
+ if (!obj)
+ return log_msg_ret("find", -ENOENT);
+
+ switch (obj->type) {
+ case SCENEOBJT_NONE:
+ case SCENEOBJT_MENU:
+ break;
+ case SCENEOBJT_IMAGE: {
+ struct scene_obj_img *img = (struct scene_obj_img *)obj;
+ ulong width, height;
+ uint bpix;
+
+ video_bmp_get_info(img->data, &width, &height, &bpix);
+ if (widthp)
+ *widthp = width;
+ return height;
+ }
+ case SCENEOBJT_TEXT: {
+ struct scene_obj_txt *txt = (struct scene_obj_txt *)obj;
+ struct expo *exp = scn->expo;
+
+ if (widthp)
+ *widthp = 16; /* fake value for now */
+ if (txt->font_size)
+ return txt->font_size;
+ if (exp->display)
+ return video_default_font_height(exp->display);
+
+ /* use a sensible default */
+ return 16;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * scene_obj_render() - Render an object
+ *
+ */
+static int scene_obj_render(struct scene_obj *obj, bool text_mode)
+{
+ struct scene *scn = obj->scene;
+ struct expo *exp = scn->expo;
+ struct udevice *cons, *dev = exp->display;
+ int x, y, ret;
+
+ cons = NULL;
+ if (!text_mode) {
+ ret = device_find_first_child_by_uclass(dev,
+ UCLASS_VIDEO_CONSOLE,
+ &cons);
+ }
+
+ x = obj->x;
+ y = obj->y;
+
+ switch (obj->type) {
+ case SCENEOBJT_NONE:
+ break;
+ case SCENEOBJT_IMAGE: {
+ struct scene_obj_img *img = (struct scene_obj_img *)obj;
+
+ if (!cons)
+ return -ENOTSUPP;
+ ret = video_bmp_display(dev, map_to_sysmem(img->data), x, y,
+ true);
+ if (ret < 0)
+ return log_msg_ret("img", ret);
+ break;
+ }
+ case SCENEOBJT_TEXT: {
+ struct scene_obj_txt *txt = (struct scene_obj_txt *)obj;
+ const char *str;
+
+ if (!cons)
+ return -ENOTSUPP;
+
+ if (txt->font_name || txt->font_size) {
+ ret = vidconsole_select_font(cons,
+ txt->font_name,
+ txt->font_size);
+ } else {
+ ret = vidconsole_select_font(cons, NULL, 0);
+ }
+ if (ret && ret != -ENOSYS)
+ return log_msg_ret("font", ret);
+ vidconsole_set_cursor_pos(cons, x, y);
+ str = expo_get_str(exp, txt->str_id);
+ if (str)
+ vidconsole_put_string(cons, str);
+ break;
+ }
+ case SCENEOBJT_MENU: {
+ struct scene_obj_menu *menu = (struct scene_obj_menu *)obj;
+ /*
+ * With a vidconsole, the text and item pointer are rendered as
+ * normal objects so we don't need to do anything here. The menu
+ * simply controls where they are positioned.
+ */
+ if (cons)
+ return -ENOTSUPP;
+
+ ret = scene_menu_display(menu);
+ if (ret < 0)
+ return log_msg_ret("img", ret);
+
+ break;
+ }
+ }
+
+ return 0;
+}
+
+int scene_arrange(struct scene *scn)
+{
+ struct scene_obj *obj;
+ int ret;
+
+ list_for_each_entry(obj, &scn->obj_head, sibling) {
+ if (obj->type == SCENEOBJT_MENU) {
+ struct scene_obj_menu *menu;
+
+ menu = (struct scene_obj_menu *)obj,
+ ret = scene_menu_arrange(scn, menu);
+ if (ret)
+ return log_msg_ret("arr", ret);
+ }
+ }
+
+ return 0;
+}
+
+int scene_render(struct scene *scn)
+{
+ struct expo *exp = scn->expo;
+ struct scene_obj *obj;
+ int ret;
+
+ list_for_each_entry(obj, &scn->obj_head, sibling) {
+ if (!obj->hide) {
+ ret = scene_obj_render(obj, exp->text_mode);
+ if (ret && ret != -ENOTSUPP)
+ return log_msg_ret("ren", ret);
+ }
+ }
+
+ return 0;
+}
+
+int scene_send_key(struct scene *scn, int key, struct expo_action *event)
+{
+ struct scene_obj *obj;
+ int ret;
+
+ list_for_each_entry(obj, &scn->obj_head, sibling) {
+ if (obj->type == SCENEOBJT_MENU) {
+ struct scene_obj_menu *menu;
+
+ menu = (struct scene_obj_menu *)obj,
+ ret = scene_menu_send_key(scn, menu, key, event);
+ if (ret)
+ return log_msg_ret("key", ret);
+
+ /* only allow one menu */
+ ret = scene_menu_arrange(scn, menu);
+ if (ret)
+ return log_msg_ret("arr", ret);
+ break;
+ }
+ }
+
+ return 0;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Internal header file for scenes
+ *
+ * Copyright 2022 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __SCENE_INTERNAL_H
+#define __SCENE_INTERNAL_H
+
+/**
+ * expo_lookup_scene_id() - Look up a scene ID
+ *
+ * @exp: Expo to use
+ * @id: scene ID to look up
+ * Returns: Scene for that ID, or NULL if none
+ */
+struct scene *expo_lookup_scene_id(struct expo *exp, uint scene_id);
+
+/**
+ * resolve_id() - Automatically allocate an ID if needed
+ *
+ * @exp: Expo to use
+ * @id: ID to use, or 0 to auto-allocate one
+ * @return: Either @id, or the auto-allocated ID
+ */
+uint resolve_id(struct expo *exp, uint id);
+
+/**
+ * scene_obj_find() - Find an object in a scene
+ *
+ * Note that @type is used to restrict the search when the object type is known.
+ * If any type is acceptable, set @type to SCENEOBJT_NONE
+ *
+ * @scn: Scene to search
+ * @id: ID of object to find
+ * @type: Type of the object, or SCENEOBJT_NONE to match any type
+ */
+void *scene_obj_find(struct scene *scn, uint id, enum scene_obj_t type);
+
+/**
+ * scene_obj_add() - Add a new object to a scene
+ *
+ * @scn: Scene to update
+ * @name: Name to use (this is allocated by this call)
+ * @id: ID to use for the new object (0 to allocate one)
+ * @type: Type of object to add
+ * @size: Size to allocate for the object, in bytes
+ * @objp: Returns a pointer to the new object (must not be NULL)
+ * Returns: ID number for the object (generally @id), or -ve on error
+ */
+int scene_obj_add(struct scene *scn, const char *name, uint id,
+ enum scene_obj_t type, uint size, struct scene_obj **objp);
+
+/**
+ * scene_menu_arrange() - Set the position of things in the menu
+ *
+ * This updates any items associated with a menu to make sure they are
+ * positioned correctly relative to the menu. It also selects the first item
+ * if not already done
+ *
+ * @scn: Scene to update
+ * @menu: Menu to process
+ */
+int scene_menu_arrange(struct scene *scn, struct scene_obj_menu *menu);
+
+/**
+ * scene_menu_send_key() - Send a key to a menu for processing
+ *
+ * @scn: Scene to use
+ * @menu: Menu to use
+ * @key: Key code to send (KEY_...)
+ * @event: Place to put any event which is generated by the key
+ * @return 0 if OK, -ENOTTY if there is no current menu item, other -ve on other
+ * error
+ */
+int scene_menu_send_key(struct scene *scn, struct scene_obj_menu *menu, int key,
+ struct expo_action *event);
+
+/**
+ * scene_menu_destroy() - Destroy a menu in a scene
+ *
+ * @scn: Scene to destroy
+ */
+void scene_menu_destroy(struct scene_obj_menu *menu);
+
+/**
+ * scene_menu_display() - Display a menu as text
+ *
+ * @menu: Menu to display
+ * @return 0 if OK, -ENOENT if @id is invalid
+ */
+int scene_menu_display(struct scene_obj_menu *menu);
+
+/**
+ * scene_destroy() - Destroy a scene and all its memory
+ *
+ * @scn: Scene to destroy
+ */
+void scene_destroy(struct scene *scn);
+
+/**
+ * scene_render() - Render a scene
+ *
+ * This is called from expo_render()
+ *
+ * @scn: Scene to render
+ * Returns: 0 if OK, -ve on error
+ */
+int scene_render(struct scene *scn);
+
+/**
+ * scene_send_key() - set a keypress to a scene
+ *
+ * @scn: Scene to receive the key
+ * @key: Key to send (KEYCODE_UP)
+ * @event: Returns resulting event from this keypress
+ * Returns: 0 if OK, -ve on error
+ */
+int scene_send_key(struct scene *scn, int key, struct expo_action *event);
+
+#endif /* __SCENE_INTERNAL_H */
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