mirror of
https://github.com/koreader/koreader
synced 2024-10-31 21:20:20 +00:00
f307264fb6
this allows to render glyphs and also brings a simple engine for rendering UTF-8 strings onto the framebuffer. blitting to uneven offset is implemented here, too, but needs more work and is still buggy. In the end, this will allow for a simple GUI.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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KindlePDFViewer: miscellaneous utility functions for Lua
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Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/time.h>
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#include "util.h"
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static int gettime(lua_State *L) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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lua_pushinteger(L, tv.tv_sec);
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lua_pushinteger(L, tv.tv_usec);
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return 2;
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}
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static int utf8charcode(lua_State *L) {
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size_t len;
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const char* utf8char = luaL_checklstring(L, 1, &len);
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int c;
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if(len == 1) {
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c = utf8char[0] & 0x7F; /* should not be needed */
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} else if(len == 2) {
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c = ((utf8char[0] & 0x1F) << 6) | (utf8char[1] & 0x3F);
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} else if(len == 3) {
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c = ((utf8char[0] & 0x0F) << 12) | ((utf8char[1] & 0x3F) << 6) | (utf8char[2] & 0x3F);
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} else {
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// 4, 5, 6 byte cases still missing
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return 0;
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}
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lua_pushinteger(L, c);
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return 1;
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}
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static const struct luaL_reg util_func[] = {
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{"gettime", gettime},
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{"utf8charcode", utf8charcode},
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{NULL, NULL}
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};
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int luaopen_util(lua_State *L) {
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luaL_register(L, "util", util_func);
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return 1;
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}
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