LuatOS/components/lvgl/binding/luat_lib_lvgl_font.c

/*
@module  lvgl
@summary LVGL图像库
@version 1.0
@date    2021.06.01
*/

#include "luat_base.h"
#include "luat_lvgl.h"
#include "lvgl.h"
#include "luat_malloc.h"

#include "luat_lvgl_fonts.h"

/*
获取内置字体
@api lvgl.font_get(name)
@string 字体名称+字号, 例如 opposans_m_10 simsun_48
@return userdata 字体指针
@usage

local font = lvgl.font_get("simsun_48")
*/
int luat_lv_font_get(lua_State *L) {
    lv_font_t* font = NULL;
    const char* fontname = luaL_checkstring(L, 1);
    if (!strcmp("", fontname)) {
    }
#ifdef LV_FONT_MONTSERRAT_14
    else if (!strcmp("montserrat_14", fontname)) { font = &lv_font_montserrat_14;}
#endif
#ifdef LV_FONT_OPPOSANS_M_8
    else if (!strcmp("opposans_m_8", fontname)) { font = &lv_font_opposans_m_8;}
#endif
#ifdef LV_FONT_OPPOSANS_M_10
    else if (!strcmp("opposans_m_10", fontname)) { font = &lv_font_opposans_m_10;}
#endif
#ifdef LV_FONT_OPPOSANS_M_12
    else if (!strcmp("opposans_m_12", fontname)) { font = &lv_font_opposans_m_12;}
#endif
#ifdef LV_FONT_OPPOSANS_M_14
    else if (!strcmp("opposans_m_14", fontname)) { font = &lv_font_opposans_m_14;}
#endif
#ifdef LV_FONT_OPPOSANS_M_16
    else if (!strcmp("opposans_m_16", fontname)) { font = &lv_font_opposans_m_16;}
#endif
#ifdef LV_FONT_OPPOSANS_M_18
    else if (!strcmp("opposans_m_18", fontname)) { font = &lv_font_opposans_m_18;}
#endif
#ifdef LV_FONT_OPPOSANS_M_20
    else if (!strcmp("opposans_m_20", fontname)) { font = &lv_font_opposans_m_20;}
#endif
#ifdef LV_FONT_OPPOSANS_M_22
    else if (!strcmp("opposans_m_22", fontname)) { font = &lv_font_opposans_m_22;}
#endif
#ifdef USE_LVGL_SIMSUN_48
    else if (!strcmp("simsun_48", fontname)) { font = &lv_font_simsun_48;}
#endif

    if (font) {
        lua_pushlightuserdata(L, font);
        return 1;
    }
    return 0;
}

/*
从文件系统加载字体
@api lvgl.font_load(path)
@string 字体路径
@return userdata 字体指针
@usage
local font = lvgl.font_load("/font_simsun_32.bin")
*/
int luat_lv_font_load(lua_State *L) {
    const char* fontname = luaL_checkstring(L, 1);
    lv_font_t* font = lv_font_load(fontname);
    if (font) {
        lua_pushlightuserdata(L, font);
        return 1;
    }
    return 0;
}

/*
释放字体,慎用!!!仅通过font_load加载的字体允许卸载,通过font_get获取的字体不允许卸载
@api lvgl.font_free(font)
@string 字体路径
@return userdata 字体指针
@usage
local font = lvgl.font_load("/font_simsun_32.bin")
-- N N N N 操作
-- 确定字体不被使用,不被引用,且内存紧张需要释放
lvgl.font_free(font)
*/
int luat_lv_font_free(lua_State *L) {
    lv_font_t* font = lua_touserdata(L, 1);
    if (font) {
        lv_font_free(font);
    }
    return 0;
}