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_mem.h"

#include "luat_lvgl_fonts.h"
#include "luat_spi.h"

#ifdef LUAT_USE_GTFONT
    extern luat_spi_device_t* gt_spi_dev;
#endif

typedef struct lvfont
{
    const char* name;
    const void* data;
}lvfont_t;

static const lvfont_t fonts[] = {
    {.name="montserrat_14", .data=&lv_font_montserrat_14},
#ifdef LV_FONT_OPPOSANS_M_8
    {.name="opposans_m_8", .data=&lv_font_opposans_m_8},
#endif
#ifdef LV_FONT_OPPOSANS_M_10
    {.name="opposans_m_10", .data=&lv_font_opposans_m_10},
#endif
#ifdef LV_FONT_OPPOSANS_M_12
    {.name="opposans_m_12", .data=&lv_font_opposans_m_12},
#endif
#ifdef LV_FONT_OPPOSANS_M_14
    {.name="opposans_m_14", .data=&lv_font_opposans_m_14},
#endif
#ifdef LV_FONT_OPPOSANS_M_16
    {.name="opposans_m_16", .data=&lv_font_opposans_m_16},
#endif
#ifdef LV_FONT_OPPOSANS_M_18
    {.name="opposans_m_18", .data=&lv_font_opposans_m_18},
#endif
#ifdef LV_FONT_OPPOSANS_M_20
    {.name="opposans_m_20", .data=&lv_font_opposans_m_20},
#endif
#ifdef LV_FONT_OPPOSANS_M_22
    {.name="opposans_m_22", .data=&lv_font_opposans_m_22},
#endif
    {.name=NULL, .data=NULL}
};

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

local font = lvgl.font_get("opposans_m_12")
*/
int luat_lv_font_get(lua_State *L) {
    const char* fontname = luaL_checkstring(L, 1);
    if (!strcmp("", fontname)) {
        LLOGE("字体名称不能是空字符串");
        return 0;
    }
    for (size_t i = 0; i < sizeof(fonts) / sizeof(lvfont_t); i++)
    {
        if (fonts[i].name == NULL) {
            break;
        }
        if (!strcmp(fontname, fonts[i].name)) {
            lua_pushlightuserdata(L, fonts[i].data);
            return 1;
        }
    }
    LLOGE("没有找到对应的字体名称 %s", fontname);
    for (size_t i = 0; i < sizeof(fonts) / sizeof(lvfont_t); i++)
    {
        if (fonts[i].name == NULL) {
            break;
        }
        LLOGI("本固件支持的字体名称: %s", fonts[i].name);
    }
    return 0;
}

/*
从文件系统加载字体
@api lvgl.font_load(path/spi_device,size,bpp,thickness,cache_size,sty_zh,sty_en)
@string/userdata 字体路径/spi_device (spi_device为使用外置高通矢量字库芯片)
@number size 可选,字号 16-192 默认16(使用高通矢量字库)
@number bpp 可选 深度 默认4(使用高通矢量字库)
@number thickness 可选 粗细值 默认size * bpp(使用高通矢量字库)
@number cache_size 可选 默认0(使用高通矢量字库)
@number sty_zh 可选 选择字体 默认1(使用高通矢量字库)
@number sty_en 可选 选择字体 默认3(使用高通矢量字库)
@return userdata 字体指针
@usage
local font = lvgl.font_load("/font_32.bin")
--local font = lvgl.font_load(spi_device,16)(高通矢量字库)
*/
int luat_lv_font_load(lua_State *L) {
    lv_font_t *font = NULL;
    if (lua_isuserdata(L, 1)) {
        #ifdef LUAT_USE_GTFONT
            luat_spi_device_t *spi = lua_touserdata(L, 1);
            uint8_t size = luaL_optinteger(L, 2, 16);
            uint8_t bpp = luaL_optinteger(L, 3, 4);
            uint16_t thickness = luaL_optinteger(L, 4, size * bpp);
            uint8_t cache_size = luaL_optinteger(L, 5, 0);
            uint8_t sty_zh = luaL_optinteger(L, 6, 1);
            uint8_t sty_en = luaL_optinteger(L, 7, 3);

            if (!(bpp >= 1 && bpp <= 4 && bpp != 3)) {
                return 0;
            }
            if (gt_spi_dev == NULL) {
                gt_spi_dev = lua_touserdata(L, 1);
            }
            font = lv_font_new_gt(sty_zh, sty_en, size, bpp, thickness, cache_size);
        #else
        LLOGE("本固件没有包含高通字体芯片的驱动");
        #endif
    } else {
        const char* path = luaL_checkstring(L, 1);
        LLOGD("从文件加载lvgl字体 %s", path);
        font = lv_font_load(path);
        if (!font) {
            LLOGE("从文件加载lvgl字体 %s 失败", path);
        }
    }
    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_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) {
        if (lv_font_is_gt(font)) lv_font_del_gt(font);
        else lv_font_free(font);
    }
    return 0;
}