Performance Improvements

Pass theme list & its entries around by reference rather than copying them.
Fix bug in async icon loading that caused icons to be loaded multiple times.

Original PR by @LiquidFenrir

include/entries_list.h

@@ -0,0 +1,106 @@
+/*
+*   This file is part of Anemone3DS
+*   Copyright (C) 2016-2020 Contributors in CONTRIBUTORS.md
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+*       * Requiring preservation of specified reasonable legal notices or
+*         author attributions in that material or in the Appropriate Legal
+*         Notices displayed by works containing it.
+*       * Prohibiting misrepresentation of the origin of that material,
+*         or requiring that modified versions of such material be marked in
+*         reasonable ways as different from the original version.
+*/
+
+#ifndef ENTRIES_LIST_H
+#define ENTRIES_LIST_H
+
+#include "common.h"
+#include <jansson.h>
+
+typedef enum {
+    SORT_NONE,
+
+    SORT_NAME,
+    SORT_AUTHOR,
+    SORT_PATH,
+} SortMode;
+
+typedef struct {
+    u16 path[0x106];
+    bool is_zip;
+    bool in_shuffle;
+    bool no_bgm_shuffle;
+    bool installed;
+    u32 placeholder_color; // doubles as not-info-loaded when == 0
+
+    json_int_t tp_download_id;
+    u16 name[0x41];
+    u16 desc[0x81];
+    u16 author[0x41];
+} Entry_s;
+
+typedef struct {
+    Tex3DS_SubTexture subtex;
+    u16 x, y;
+} Entry_Icon_s;
+
+typedef struct {
+    Entry_s * entries;
+    int entries_count;
+    int entries_capacity;
+
+    C3D_Tex icons_texture;
+    Entry_Icon_s * icons_info;
+
+    int previous_scroll;
+    int scroll;
+
+    int previous_selected;
+    int selected_entry;
+
+    int shuffle_count;
+
+    EntryMode mode;
+    int entries_per_screen_v; // rows of entries on 1 screen
+    int entries_per_screen_h; // columns of entries on 1 screen
+    int entries_loaded; // amount of entries on 1 screen
+    int entry_size; // size in pixels of an entry icon
+
+    SortMode current_sort;
+
+    json_int_t tp_current_page;
+    json_int_t tp_page_count;
+    char * tp_search;
+    const char * loading_path;
+} Entry_List_s;
+
+void sort_by_name(Entry_List_s * list);
+void sort_by_author(Entry_List_s * list);
+void sort_by_filename(Entry_List_s * list);
+
+void delete_entry(Entry_s * entry, bool is_file);
+// assumes list has been memset to 0
+typedef enum InstallType_e InstallType;
+Result load_entries(const char * loading_path, Entry_List_s * list, const InstallType loading_screen);
+u32 load_data(const char * filename, const Entry_s * entry, char ** buf);
+C2D_Image get_icon_at(Entry_List_s * list, size_t index);
+
+// assumes list doesn't have any elements yet
+void list_init_capacity(Entry_List_s * list, const int init_capacity);
+// assumes list has been inited with a non zero capacity
+ssize_t list_add_entry(Entry_List_s * list);
+
+#endif