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a2c10f6189
We used 16-bit variables to store the 'character code' everywhere but this won't let us represent anything beyond U+FFFF. This patch changes those variables to a custom type that can be 32 or 16 bits depending on the build, and adjusts numerous internal APIs and datastructures to match. This includes: * utf8decode() and friends * font manipulation, caching, rendering, and generation * on-screen keyboard * FAT filesystem (parsing and generating utf16 LFNs) * WIN32 simulator platform code Note that this patch doesn't _enable_ >16bit unicode support; a followup patch will turn that on for appropriate targets. Appears to work on: * hosted linux, native, linux simulator in both 16/32-bit modes. Needs testing on: * windows and macos simulator (16bit+32bit) Change-Id: Iba111b27d2433019b6bff937cf1ebd2c4353a0e8
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2003 Tat Tang
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _FONT_CACHE_H_
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#define _FONT_CACHE_H_
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#include <stdbool.h>
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#include "config.h"
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#include "lru.h"
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/*******************************************************************************
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*
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******************************************************************************/
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struct font_cache
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{
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struct lru _lru;
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unsigned int _size;
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unsigned int _capacity;
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ucschar_t _prev_char_code;
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int _prev_result;
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short *_index; /* index of lru handles in char_code order */
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};
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struct font_cache_entry
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{
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ucschar_t _char_code;
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unsigned char width;
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unsigned char bitmap[1]; /* place holder */
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};
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/* void (*f) (void*, struct font_cache_entry*); */
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/* Create an auto sized font cache from buf */
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void font_cache_create(
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struct font_cache* fcache, void* buf, int buf_size, int bitmap_bytes_size);
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/* Get font cache entry for the given char_code
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*
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* cache_only: true if only a cache lookup should be performed and loading on miss should be avoided
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*
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* Note: With cache_only this can return NULL, which otherwise never happens */
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struct font_cache_entry* font_cache_get(
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struct font_cache* fcache,
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ucschar_t char_code,
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bool cache_only,
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void (*callback) (struct font_cache_entry* p, void *callback_data),
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void *callback_data);
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#endif
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