409 lines
12 KiB
C
409 lines
12 KiB
C
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/**
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* @file lv_img.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_img.h"
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#if USE_LV_IMG != 0
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/*Testing of dependencies*/
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#if USE_LV_LABEL == 0
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#error "lv_img: lv_label is required. Enable it in lv_conf.h (USE_LV_LABEL 1) "
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#endif
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#include "../lv_core/lv_lang.h"
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#include "../lv_themes/lv_theme.h"
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#include "../lv_misc/lv_fs.h"
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#include "../lv_misc/lv_ufs.h"
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#include "../lv_misc/lv_txt.h"
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#include "../lv_misc/lv_log.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode_t mode);
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static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param);
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/**********************
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* STATIC VARIABLES
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**********************/
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static lv_signal_func_t ancestor_signal;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Create an image objects
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* @param par pointer to an object, it will be the parent of the new button
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* @param copy pointer to a image object, if not NULL then the new object will be copied from it
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* @return pointer to the created image
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*/
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lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
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{
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LV_LOG_TRACE("image create started");
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lv_obj_t * new_img = NULL;
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/*Create a basic object*/
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new_img = lv_obj_create(par, copy);
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lv_mem_assert(new_img);
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if(new_img == NULL) return NULL;
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if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_img);
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/*Extend the basic object to image object*/
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lv_img_ext_t * ext = lv_obj_allocate_ext_attr(new_img, sizeof(lv_img_ext_t));
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lv_mem_assert(ext);
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if(ext == NULL) return NULL;
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ext->src = NULL;
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ext->src_type = LV_IMG_SRC_UNKNOWN;
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ext->cf = LV_IMG_CF_UNKOWN;
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ext->w = lv_obj_get_width(new_img);
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ext->h = lv_obj_get_height(new_img);
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ext->auto_size = 1;
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#if USE_LV_MULTI_LANG
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ext->lang_txt_id = LV_LANG_TXT_ID_NONE;
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#endif
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/*Init the new object*/
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lv_obj_set_signal_func(new_img, lv_img_signal);
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lv_obj_set_design_func(new_img, lv_img_design);
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if(copy == NULL) {
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lv_obj_set_click(new_img, false);
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/* Enable auto size for non screens
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* because image screens are wallpapers
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* and must be screen sized*/
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if(par != NULL) {
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ext->auto_size = 1;
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lv_obj_set_style(new_img, NULL); /*Inherit the style by default*/
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} else {
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ext->auto_size = 0;
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lv_obj_set_style(new_img, &lv_style_plain); /*Set a style for screens*/
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}
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} else {
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lv_img_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
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ext->auto_size = copy_ext->auto_size;
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lv_img_set_src(new_img, copy_ext->src);
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/*Refresh the style with new signal function*/
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lv_obj_refresh_style(new_img);
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}
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LV_LOG_INFO("image created");
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return new_img;
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}
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set the pixel map to display by the image
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* @param img pointer to an image object
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* @param data the image data
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*/
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void lv_img_set_src(lv_obj_t * img, const void * src_img)
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{
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lv_img_src_t src_type = lv_img_src_get_type(src_img);
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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#if LV_LOG_LEVEL >= LV_LOG_LEVEL_INFO
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switch(src_type) {
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case LV_IMG_SRC_FILE:
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LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_FILE` type found");
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break;
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case LV_IMG_SRC_VARIABLE:
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LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
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break;
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case LV_IMG_SRC_SYMBOL:
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LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_SYMBOL` type found");
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break;
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default:
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LV_LOG_WARN("lv_img_set_src: unknown type");
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}
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#endif
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/*If the new source type is unknown free the memories of the old source*/
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if(src_type == LV_IMG_SRC_UNKNOWN) {
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LV_LOG_WARN("lv_img_set_src: unknown image type");
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if(ext->src_type == LV_IMG_SRC_SYMBOL || ext->src_type == LV_IMG_SRC_FILE) {
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lv_mem_free(ext->src);
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}
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ext->src = NULL;
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ext->src_type = LV_IMG_SRC_UNKNOWN;
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return;
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}
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lv_img_header_t header;
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lv_img_dsc_get_info(src_img, &header);
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/*Save the source*/
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if(src_type == LV_IMG_SRC_VARIABLE) {
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LV_LOG_INFO("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
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/*If memory was allocated because of the previous `src_type` then free it*/
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if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
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lv_mem_free(ext->src);
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}
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ext->src = src_img;
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} else if(src_type == LV_IMG_SRC_FILE || src_type == LV_IMG_SRC_SYMBOL) {
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/* If the new and the old src are the same then it was only a refresh.*/
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if(ext->src != src_img) {
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/*If memory was allocated because of the previous `src_type` then free it*/
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if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
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lv_mem_free(ext->src);
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}
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char * new_str = lv_mem_alloc(strlen(src_img) + 1);
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lv_mem_assert(new_str);
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if(new_str == NULL) return;
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strcpy(new_str, src_img);
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ext->src = new_str;
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}
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}
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if(src_type == LV_IMG_SRC_SYMBOL) {
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/*`lv_img_dsc_get_info` couldn't set the with and height of a font so set it here*/
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lv_style_t * style = lv_img_get_style(img);
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lv_point_t size;
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lv_txt_get_size(&size, src_img, style->text.font, style->text.letter_space, style->text.line_space, LV_COORD_MAX, LV_TXT_FLAG_NONE);
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header.w = size.x;
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header.h = size.y;
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}
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ext->src_type = src_type;
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ext->w = header.w;
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ext->h = header.h;
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ext->cf = header.cf;
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if(lv_img_get_auto_size(img) != false) {
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lv_obj_set_size(img, ext->w, ext->h);
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}
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lv_obj_invalidate(img);
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}
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#if USE_LV_MULTI_LANG
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/**
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* Set an ID which means a the same source but in different languages
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* @param img pointer to an image object
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* @param src_id ID of the source
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*/
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void lv_img_set_src_id(lv_obj_t * img, uint32_t src_id)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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ext->lang_txt_id = src_id;
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/*Apply the new language*/
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img->signal_func(img, LV_SIGNAL_LANG_CHG, NULL);
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}
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#endif
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/**
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* Enable the auto size feature.
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* If enabled the object size will be same as the picture size.
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* @param img pointer to an image
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* @param en true: auto size enable, false: auto size disable
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*/
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void lv_img_set_auto_size(lv_obj_t * img, bool en)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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ext->auto_size = (en == false ? 0 : 1);
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}
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/*=====================
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* Getter functions
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*====================*/
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/**
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* Get the source of the image
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* @param img pointer to an image object
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* @return the image source (symbol, file name or C array)
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*/
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const void * lv_img_get_src(lv_obj_t * img)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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return ext->src;
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}
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/**
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* Get the name of the file set for an image
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* @param img pointer to an image
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* @return file name
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*/
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const char * lv_img_get_file_name(const lv_obj_t * img)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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if(ext->src_type == LV_IMG_SRC_FILE) return ext->src;
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else return "";
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}
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#if USE_LV_MULTI_LANG
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/**
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* Get the source ID of the image. (Used by the multi-language feature)
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* @param img pointer to an image
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* @return ID of the source
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*/
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uint16_t lv_img_get_src_id(lv_obj_t * img)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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return ext->lang_txt_id;
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}
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#endif
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/**
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* Get the auto size enable attribute
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* @param img pointer to an image
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* @return true: auto size is enabled, false: auto size is disabled
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*/
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bool lv_img_get_auto_size(const lv_obj_t * img)
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{
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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return ext->auto_size == 0 ? false : true;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Handle the drawing related tasks of the images
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* @param img pointer to an object
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* @param mask the object will be drawn only in this area
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* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
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* (return 'true' if yes)
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* LV_DESIGN_DRAW: draw the object (always return 'true')
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* LV_DESIGN_DRAW_POST: drawing after every children are drawn
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* @param return true/false, depends on 'mode'
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*/
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static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode_t mode)
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{
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lv_style_t * style = lv_obj_get_style(img);
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lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
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if(mode == LV_DESIGN_COVER_CHK) {
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bool cover = false;
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if(ext->src_type == LV_IMG_SRC_UNKNOWN || ext->src_type == LV_IMG_SRC_SYMBOL) return false;
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if(ext->cf == LV_IMG_CF_TRUE_COLOR || ext->cf == LV_IMG_CF_RAW) cover = lv_area_is_in(mask, &img->coords);
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return cover;
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} else if(mode == LV_DESIGN_DRAW_MAIN) {
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if(ext->h == 0 || ext->w == 0) return true;
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lv_area_t coords;
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lv_opa_t opa_scale = lv_obj_get_opa_scale(img);
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lv_obj_get_coords(img, &coords);
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if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_VARIABLE) {
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LV_LOG_TRACE("lv_img_design: start to draw image");
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lv_area_t cords_tmp;
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cords_tmp.y1 = coords.y1;
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cords_tmp.y2 = coords.y1 + ext->h - 1;
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for(; cords_tmp.y1 < coords.y2; cords_tmp.y1 += ext->h, cords_tmp.y2 += ext->h) {
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cords_tmp.x1 = coords.x1;
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cords_tmp.x2 = coords.x1 + ext->w - 1;
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for(; cords_tmp.x1 < coords.x2; cords_tmp.x1 += ext->w, cords_tmp.x2 += ext->w) {
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lv_draw_img(&cords_tmp, mask, ext->src, style, opa_scale);
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}
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}
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} else if(ext->src_type == LV_IMG_SRC_SYMBOL) {
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LV_LOG_TRACE("lv_img_design: start to draw symbol");
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lv_style_t style_mod;
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lv_style_copy(&style_mod, style);
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style_mod.text.color = style->image.color;
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lv_draw_label(&coords, mask, &style_mod, opa_scale, ext->src, LV_TXT_FLAG_NONE, NULL);
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} else {
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/*Trigger the error handler of image drawer*/
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LV_LOG_WARN("lv_img_design: image source type is unknown");
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lv_draw_img(&img->coords, mask, NULL, style, opa_scale);
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}
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}
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return true;
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}
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|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Signal function of the image
|
||
|
|
* @param img pointer to an image object
|
||
|
|
* @param sign a signal type from lv_signal_t enum
|
||
|
|
* @param param pointer to a signal specific variable
|
||
|
|
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
|
||
|
|
*/
|
||
|
|
static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
|
||
|
|
{
|
||
|
|
lv_res_t res;
|
||
|
|
|
||
|
|
/* Include the ancient signal function */
|
||
|
|
res = ancestor_signal(img, sign, param);
|
||
|
|
if(res != LV_RES_OK) return res;
|
||
|
|
|
||
|
|
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
|
||
|
|
if(sign == LV_SIGNAL_CLEANUP) {
|
||
|
|
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
|
||
|
|
lv_mem_free(ext->src);
|
||
|
|
ext->src = NULL;
|
||
|
|
ext->src_type = LV_IMG_SRC_UNKNOWN;
|
||
|
|
}
|
||
|
|
} else if(sign == LV_SIGNAL_STYLE_CHG) {
|
||
|
|
/*Refresh the file name to refresh the symbol text size*/
|
||
|
|
if(ext->src_type == LV_IMG_SRC_SYMBOL) {
|
||
|
|
lv_img_set_src(img, ext->src);
|
||
|
|
|
||
|
|
}
|
||
|
|
} else if(sign == LV_SIGNAL_LANG_CHG) {
|
||
|
|
#if USE_LV_MULTI_LANG
|
||
|
|
if(ext->lang_txt_id != LV_LANG_TXT_ID_NONE) {
|
||
|
|
const char * lang_src = lv_lang_get_text(ext->lang_txt_id);
|
||
|
|
if(lang_src) {
|
||
|
|
lv_img_set_src(img, lang_src);
|
||
|
|
} else {
|
||
|
|
LV_LOG_WARN("lv_lang_get_text return NULL for an image's source");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
} else if(sign == LV_SIGNAL_GET_TYPE) {
|
||
|
|
lv_obj_type_t * buf = param;
|
||
|
|
uint8_t i;
|
||
|
|
for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) { /*Find the last set data*/
|
||
|
|
if(buf->type[i] == NULL) break;
|
||
|
|
}
|
||
|
|
buf->type[i] = "lv_img";
|
||
|
|
}
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|