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/**
* @file lv_barcode.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_barcode.h"
#include "../../lvgl.h"
#if LV_USE_BARCODE
#include "code128.h"
/*********************
* DEFINES
*********************/
#define MY_CLASS (&lv_barcode_class)
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_barcode_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_barcode_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static bool lv_barcode_change_buf_size(lv_obj_t * obj, int32_t w, int32_t h);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_barcode_class = {
.constructor_cb = lv_barcode_constructor,
.destructor_cb = lv_barcode_destructor,
.width_def = LV_SIZE_CONTENT,
.instance_size = sizeof(lv_barcode_t),
.base_class = &lv_canvas_class,
.name = "barcode",
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_barcode_create(lv_obj_t * parent)
{
LV_LOG_INFO("begin");
lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
lv_obj_class_init_obj(obj);
return obj;
}
void lv_barcode_set_dark_color(lv_obj_t * obj, lv_color_t color)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
barcode->dark_color = color;
}
void lv_barcode_set_light_color(lv_obj_t * obj, lv_color_t color)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
barcode->light_color = color;
}
void lv_barcode_set_scale(lv_obj_t * obj, uint16_t scale)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
if(scale == 0) {
scale = 1;
}
lv_barcode_t * barcode = (lv_barcode_t *)obj;
barcode->scale = scale;
}
void lv_barcode_set_direction(lv_obj_t * obj, lv_dir_t direction)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
barcode->direction = direction;
}
lv_result_t lv_barcode_update(lv_obj_t * obj, const char * data)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
LV_ASSERT_NULL(data);
lv_result_t res = LV_RESULT_INVALID;
lv_barcode_t * barcode = (lv_barcode_t *)obj;
if(data == NULL || lv_strlen(data) == 0) {
LV_LOG_WARN("data is empty");
return LV_RESULT_INVALID;
}
size_t len = code128_estimate_len(data);
LV_LOG_INFO("data: %s, len = %zu", data, len);
char * out_buf = lv_malloc(len);
LV_ASSERT_MALLOC(out_buf);
if(!out_buf) {
LV_LOG_ERROR("malloc failed for out_buf");
return LV_RESULT_INVALID;
}
int32_t barcode_w = (int32_t) code128_encode_gs1(data, out_buf, len);
LV_LOG_INFO("barcode width = %d", (int)barcode_w);
LV_ASSERT(barcode->scale > 0);
uint16_t scale = barcode->scale;
int32_t buf_w = (barcode->direction == LV_DIR_HOR) ? barcode_w * scale : 1;
int32_t buf_h = (barcode->direction == LV_DIR_VER) ? barcode_w * scale : 1;
if(!lv_barcode_change_buf_size(obj, buf_w, buf_h)) {
goto failed;
}
lv_canvas_set_palette(obj, 0, lv_color_to_32(barcode->dark_color, 0xff));
lv_canvas_set_palette(obj, 1, lv_color_to_32(barcode->light_color, 0xff));
for(int32_t x = 0; x < barcode_w; x++) {
lv_color_t color;
color = lv_color_hex(out_buf[x] ? 0 : 1);
for(uint16_t i = 0; i < scale; i++) {
if(barcode->direction == LV_DIR_HOR) {
lv_canvas_set_px(obj, x * scale + i, 0, color, LV_OPA_COVER);
}
else {
lv_canvas_set_px(obj, 0, x * scale + i, color, LV_OPA_COVER);
}
}
}
res = LV_RESULT_OK;
failed:
lv_free(out_buf);
return res;
}
lv_color_t lv_barcode_get_dark_color(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
return barcode->dark_color;
}
lv_color_t lv_barcode_get_light_color(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
return barcode->light_color;
}
uint16_t lv_barcode_get_scale(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
return barcode->scale;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_barcode_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_barcode_t * barcode = (lv_barcode_t *)obj;
barcode->dark_color = lv_color_black();
barcode->light_color = lv_color_white();
barcode->scale = 1;
barcode->direction = LV_DIR_HOR;
lv_image_set_inner_align(obj, LV_IMAGE_ALIGN_TILE);
}
static void lv_barcode_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_draw_buf_t * draw_buf = lv_canvas_get_draw_buf(obj);
if(draw_buf == NULL) return;
lv_image_cache_drop(draw_buf);
/*@fixme destroy buffer in cache free_cb.*/
lv_draw_buf_destroy(draw_buf);
}
static bool lv_barcode_change_buf_size(lv_obj_t * obj, int32_t w, int32_t h)
{
LV_ASSERT_NULL(obj);
LV_ASSERT(w > 0);
lv_draw_buf_t * old_buf = lv_canvas_get_draw_buf(obj);
lv_draw_buf_t * new_buf = lv_draw_buf_create(w, h, LV_COLOR_FORMAT_I1, LV_STRIDE_AUTO);
if(new_buf == NULL) {
LV_LOG_ERROR("malloc failed for canvas buffer");
return false;
}
lv_canvas_set_draw_buf(obj, new_buf);
LV_LOG_INFO("set canvas buffer: %p, width = %d", (void *)new_buf, (int)w);
if(old_buf != NULL) lv_draw_buf_destroy(old_buf);
return true;
}
#endif /*LV_USE_BARCODE*/
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