godot/core/io/file_access.h
bruvzg ecec415988
Use system fonts as fallback and improve system font handling.
Add support for font weight and stretch selection when using system fonts.
Add function to get system fallback font from a font name, style, text, and language code.
Implement system font support for Android.
Use system fonts as a last resort fallback.
2022-12-04 18:44:20 +02:00

214 lines
9.1 KiB
C++

/*************************************************************************/
/* file_access.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef FILE_ACCESS_H
#define FILE_ACCESS_H
#include "core/io/compression.h"
#include "core/math/math_defs.h"
#include "core/object/ref_counted.h"
#include "core/os/memory.h"
#include "core/string/ustring.h"
#include "core/typedefs.h"
/**
* Multi-Platform abstraction for accessing to files.
*/
class FileAccess : public RefCounted {
GDCLASS(FileAccess, RefCounted);
public:
enum AccessType {
ACCESS_RESOURCES,
ACCESS_USERDATA,
ACCESS_FILESYSTEM,
ACCESS_MAX
};
enum ModeFlags {
READ = 1,
WRITE = 2,
READ_WRITE = 3,
WRITE_READ = 7,
};
enum CompressionMode {
COMPRESSION_FASTLZ = Compression::MODE_FASTLZ,
COMPRESSION_DEFLATE = Compression::MODE_DEFLATE,
COMPRESSION_ZSTD = Compression::MODE_ZSTD,
COMPRESSION_GZIP = Compression::MODE_GZIP
};
typedef void (*FileCloseFailNotify)(const String &);
typedef Ref<FileAccess> (*CreateFunc)();
bool big_endian = false;
bool real_is_double = false;
virtual uint32_t _get_unix_permissions(const String &p_file) = 0;
virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) = 0;
protected:
static void _bind_methods();
AccessType get_access_type() const;
String fix_path(const String &p_path) const;
virtual Error open_internal(const String &p_path, int p_mode_flags) = 0; ///< open a file
virtual uint64_t _get_modified_time(const String &p_file) = 0;
virtual void _set_access_type(AccessType p_access);
static FileCloseFailNotify close_fail_notify;
private:
static bool backup_save;
thread_local static Error last_file_open_error;
AccessType _access_type = ACCESS_FILESYSTEM;
static CreateFunc create_func[ACCESS_MAX]; /** default file access creation function for a platform */
template <class T>
static Ref<FileAccess> _create_builtin() {
return memnew(T);
}
static Ref<FileAccess> _open(const String &p_path, ModeFlags p_mode_flags);
public:
static void set_file_close_fail_notify_callback(FileCloseFailNotify p_cbk) { close_fail_notify = p_cbk; }
virtual bool is_open() const = 0; ///< true when file is open
virtual String get_path() const { return ""; } /// returns the path for the current open file
virtual String get_path_absolute() const { return ""; } /// returns the absolute path for the current open file
virtual void seek(uint64_t p_position) = 0; ///< seek to a given position
virtual void seek_end(int64_t p_position = 0) = 0; ///< seek from the end of file with negative offset
virtual uint64_t get_position() const = 0; ///< get position in the file
virtual uint64_t get_length() const = 0; ///< get size of the file
virtual bool eof_reached() const = 0; ///< reading passed EOF
virtual uint8_t get_8() const = 0; ///< get a byte
virtual uint16_t get_16() const; ///< get 16 bits uint
virtual uint32_t get_32() const; ///< get 32 bits uint
virtual uint64_t get_64() const; ///< get 64 bits uint
virtual float get_float() const;
virtual double get_double() const;
virtual real_t get_real() const;
Variant get_var(bool p_allow_objects = false) const;
virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const; ///< get an array of bytes
Vector<uint8_t> _get_buffer(int64_t p_length) const;
virtual String get_line() const;
virtual String get_token() const;
virtual Vector<String> get_csv_line(const String &p_delim = ",") const;
String get_as_text(bool p_skip_cr = false) const;
virtual String get_as_utf8_string(bool p_skip_cr = false) const;
/**
* Use this for files WRITTEN in _big_ endian machines (ie, amiga/mac)
* It's not about the current CPU type but file formats.
* This flag gets reset to `false` (little endian) on each open.
*/
virtual void set_big_endian(bool p_big_endian) { big_endian = p_big_endian; }
inline bool is_big_endian() const { return big_endian; }
virtual Error get_error() const = 0; ///< get last error
virtual void flush() = 0;
virtual void store_8(uint8_t p_dest) = 0; ///< store a byte
virtual void store_16(uint16_t p_dest); ///< store 16 bits uint
virtual void store_32(uint32_t p_dest); ///< store 32 bits uint
virtual void store_64(uint64_t p_dest); ///< store 64 bits uint
virtual void store_float(float p_dest);
virtual void store_double(double p_dest);
virtual void store_real(real_t p_real);
virtual void store_string(const String &p_string);
virtual void store_line(const String &p_line);
virtual void store_csv_line(const Vector<String> &p_values, const String &p_delim = ",");
virtual void store_pascal_string(const String &p_string);
virtual String get_pascal_string();
virtual void store_buffer(const uint8_t *p_src, uint64_t p_length); ///< store an array of bytes
void _store_buffer(const Vector<uint8_t> &p_buffer);
void store_var(const Variant &p_var, bool p_full_objects = false);
virtual bool file_exists(const String &p_name) = 0; ///< return true if a file exists
virtual Error reopen(const String &p_path, int p_mode_flags); ///< does not change the AccessType
static Ref<FileAccess> create(AccessType p_access); /// Create a file access (for the current platform) this is the only portable way of accessing files.
static Ref<FileAccess> create_for_path(const String &p_path);
static Ref<FileAccess> open(const String &p_path, int p_mode_flags, Error *r_error = nullptr); /// Create a file access (for the current platform) this is the only portable way of accessing files.
static Ref<FileAccess> open_encrypted(const String &p_path, ModeFlags p_mode_flags, const Vector<uint8_t> &p_key);
static Ref<FileAccess> open_encrypted_pass(const String &p_path, ModeFlags p_mode_flags, const String &p_pass);
static Ref<FileAccess> open_compressed(const String &p_path, ModeFlags p_mode_flags, CompressionMode p_compress_mode = COMPRESSION_FASTLZ);
static Error get_open_error();
static CreateFunc get_create_func(AccessType p_access);
static bool exists(const String &p_name); ///< return true if a file exists
static uint64_t get_modified_time(const String &p_file);
static uint32_t get_unix_permissions(const String &p_file);
static Error set_unix_permissions(const String &p_file, uint32_t p_permissions);
static void set_backup_save(bool p_enable) { backup_save = p_enable; };
static bool is_backup_save_enabled() { return backup_save; };
static String get_md5(const String &p_file);
static String get_sha256(const String &p_file);
static String get_multiple_md5(const Vector<String> &p_file);
static Vector<uint8_t> get_file_as_bytes(const String &p_path, Error *r_error = nullptr);
static String get_file_as_string(const String &p_path, Error *r_error = nullptr);
static PackedByteArray _get_file_as_bytes(const String &p_path) { return get_file_as_bytes(p_path); }
static String _get_file_as_string(const String &p_path) { return get_file_as_string(p_path); };
template <class T>
static void make_default(AccessType p_access) {
create_func[p_access] = _create_builtin<T>;
}
FileAccess() {}
virtual ~FileAccess() {}
};
VARIANT_ENUM_CAST(FileAccess::CompressionMode);
VARIANT_ENUM_CAST(FileAccess::ModeFlags);
#endif // FILE_ACCESS_H