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basics image decoder interface impemented (wip)

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This commit is contained in:
Gabor Kiss-Vamosi
2018-08-08 09:50:01 +02:00
parent 8105bced11
commit e7f55612b0
7 changed files with 373 additions and 230 deletions
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30
lv_draw/lv_draw.h
View File

@@ -38,36 +38,6 @@ extern "C" {
* TYPEDEFS
**********************/
/* Image header it is compatible with
* the result image converter utility*/
typedef struct
{
union {
struct {
uint32_t chroma_keyed:1; /*1: The image contains transparent pixels with LV_COLOR_TRANSP color*/
uint32_t alpha_byte :1; /*Every pixel is extended with a 8 bit alpha channel*/
uint32_t format :6; /*See: lv_img_px_format*/
uint32_t w:12; /*Width of the image map*/
uint32_t h:12; /*Height of the image map*/
} header;
uint8_t src_type;
};
union {
const uint8_t * pixel_map; /*For internal images (c arrays) pointer to the pixels array*/
uint8_t first_pixel; /*For external images (binary) the first byte of the pixels (just for convenient)*/
};
} lv_img_t;
typedef enum {
LV_IMG_FORMAT_UNKOWN = 0,
LV_IMG_FORMAT_INTERNAL_RAW, /*'lv_img_t' variable compiled with the code*/
LV_IMG_FORMAT_FILE_RAW_RGB332, /*8 bit*/
LV_IMG_FORMAT_FILE_RAW_RGB565, /*16 bit*/
LV_IMG_FORMAT_FILE_RAW_RGB888, /*24 bit (stored on 32 bit)*/
} lv_img_format_t;
typedef enum {
LV_IMG_SRC_VARIABLE,
LV_IMG_SRC_FILE,

241
lv_draw/lv_draw_img.c
View File

@@ -20,6 +20,9 @@
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_img_draw_built_in(const lv_area_t * coords, const lv_area_t * mask,
const void * src, const lv_style_t * style, lv_opa_t opa_scale);
static bool lv_img_dsc_get_info_built_in(const char * src, lv_img_header_t * header, const lv_style_t * style);
/**********************
* STATIC VARIABLES
@@ -44,55 +47,210 @@
void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
const void * src, const lv_style_t * style, lv_opa_t opa_scale)
{
if(src == NULL) {
lv_draw_rect(coords, mask, &lv_style_plain, LV_OPA_COVER);
lv_draw_label(coords, mask, &lv_style_plain, LV_OPA_COVER, "No\ndata", LV_TXT_FLAG_NONE, NULL);
return;
}
lv_img_draw_built_in(coords, mask, src, style, opa_scale);
}
/**
*
* @param src
* @param header
* @param style
* @return
*/
bool lv_img_dsc_get_info(const char * src, lv_img_header_t * header, const lv_style_t * style)
{
header->always_zero = 0;
return lv_img_dsc_get_info_built_in(src, header, style);
}
uint8_t lv_img_color_format_get_px_size(lv_img_color_format_t cf)
{
switch(cf) {
case LV_IMG_FORMAT_UNKOWN:
case LV_IMG_FORMAT_RAW:
return 0;
case LV_IMG_FORMAT_TRUE_COLOR:
case LV_IMG_FORMAT_TRUE_COLOR_CHROMA_KEYED:
return LV_COLOR_SIZE;
case LV_IMG_FORMAT_TRUE_COLOR_ALPHA:
#if LV_COLOR_DEPTH != 24
return LV_COLOR_SIZE;
#else
return LV_COLOR_SIZE + 1;
#endif
case LV_IMG_FORMAT_INDEXED_1BIT:
case LV_IMG_FORMAT_ALPHA_1BIT:
return 1;
case LV_IMG_FORMAT_INDEXED_2BIT:
case LV_IMG_FORMAT_ALPHA_2BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_2BIT:
return 2;
case LV_IMG_FORMAT_INDEXED_4BIT:
case LV_IMG_FORMAT_ALPHA_4BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_4BIT:
return 4;
case LV_IMG_FORMAT_INDEXED_8BIT:
case LV_IMG_FORMAT_ALPHA_8BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_8BIT:
return 8;
case LV_IMG_FORMAT_INDEXED_ALPHA_16BIT:
return 16;
default:
return 0;
}
return 0;
}
bool lv_img_color_format_is_chroma_key(lv_img_color_format_t cf)
{
switch(cf) {
case LV_IMG_FORMAT_TRUE_COLOR_CHROMA_KEYED:
case LV_IMG_FORMAT_INDEXED_1BIT:
case LV_IMG_FORMAT_INDEXED_2BIT:
case LV_IMG_FORMAT_INDEXED_4BIT:
case LV_IMG_FORMAT_INDEXED_8BIT:
return true;
default:
return false;
}
return false;
}
bool lv_img_color_format_has_alpha(lv_img_color_format_t cf)
{
switch(cf) {
case LV_IMG_FORMAT_TRUE_COLOR_ALPHA:
case LV_IMG_FORMAT_ALPHA_1BIT:
case LV_IMG_FORMAT_ALPHA_2BIT:
case LV_IMG_FORMAT_ALPHA_4BIT:
case LV_IMG_FORMAT_ALPHA_8BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_2BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_4BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_8BIT:
case LV_IMG_FORMAT_INDEXED_ALPHA_16BIT:
return true;
default:
return false;
}
return false;
}
/**
* Get the type of an image source
* @param src pointer to an image source:
* - pointer to an 'lv_img_t' variable (image stored internally and compiled into the code)
* - a path to a file (e.g. "S:/folder/image.bin")
* - or a symbol (e.g. SYMBOL_CLOSE)
* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKOWN
*/
lv_img_src_t lv_img_src_get_type(const void * src)
{
if(src == NULL) return LV_IMG_SRC_UNKNOWN;
const uint8_t * u8_p = src;
/*The first byte shows the type of the image source*/
if(u8_p[0] >= 0x20 && u8_p[0] <= 0x7F) return LV_IMG_SRC_FILE; /*If it's an ASCII character then it's file name*/
else if(u8_p[0] >= 0x80) return LV_IMG_SRC_SYMBOL; /*Symbols begins after 0x7F*/
else return LV_IMG_SRC_VARIABLE; /*`lv_img_dsc_t` is design to the first byte < 0x20*/
return LV_IMG_SRC_UNKNOWN;
}
/**********************
* STATIC FUNCTIONS
**********************/
static bool lv_img_dsc_get_info_built_in(const char * src, lv_img_header_t * header, const lv_style_t * style)
{
lv_img_src_t src_type = lv_img_src_get_type(src);
if(src_type == LV_IMG_SRC_VARIABLE) {
header->color_format =
header->w = ((lv_img_dsc_t *)src)->header.w;
header->h = ((lv_img_dsc_t *)src)->header.h;
header->color_format = ((lv_img_dsc_t *)src)->header.color_format;
}
#if USE_LV_FILESYSTEM
else if(src_type == LV_IMG_SRC_FILE) {
lv_fs_file_t file;
lv_fs_res_t res;
uint32_t rn;
res = lv_fs_open(&file, src, LV_FS_MODE_RD);
if(res == LV_FS_RES_OK) {
res = lv_fs_read(&file, header, sizeof(lv_img_header_t), &rn);
}
/*Create a dummy header on fs error*/
if(res != LV_FS_RES_OK || rn != sizeof(lv_img_header_t)) {
header->w = LV_DPI;
header->h = LV_DPI;
header->color_format = LV_IMG_FORMAT_UNKOWN;
}
lv_fs_close(&file);
}
#endif
else if(src_type == LV_IMG_SRC_SYMBOL) {
lv_point_t size;
lv_txt_get_size(&size, src, style->text.font, style->text.letter_space, style->text.line_space, LV_COORD_MAX, LV_TXT_FLAG_NONE);
header->w = size.x;
header->h = size.y;
header->color_format = LV_IMG_FORMAT_ALPHA_1BIT; /*Symbols always have transparent parts, Important because of cover check in the design function*/
}
return true;
}
static bool lv_img_draw_built_in(const lv_area_t * coords, const lv_area_t * mask,
const void * src, const lv_style_t * style, lv_opa_t opa_scale)
{
lv_opa_t opa = opa_scale == LV_OPA_COVER ? style->image.opa : (uint16_t)((uint16_t) style->image.opa * opa_scale) >> 8;
const uint8_t * u8_p = (uint8_t *) src;
if(u8_p[0] >= 'A' && u8_p[0] <= 'Z') { /*It will be a path of a file*/
lv_img_src_t src_type = lv_img_src_get_type(src);
if(src_type == LV_IMG_SRC_FILE) { /*It will be a path to a file*/
#if USE_LV_FILESYSTEM
lv_fs_file_t file;
lv_fs_res_t res = lv_fs_open(&file, src, LV_FS_MODE_RD);
if(res == LV_FS_RES_OK) {
lv_img_t img_data;
uint32_t br;
res = lv_fs_read(&file, &img_data, sizeof(lv_img_t), &br);
if(res != LV_FS_RES_OK ) return false;
lv_area_t mask_com; /*Common area of mask and cords*/
lv_img_header_t header;
uint32_t br;
res = lv_fs_read(&file, &header, sizeof(header), &br);
lv_area_t mask_com; /*Common area of mask and cords. Only these pixels are required now.*/
bool union_ok;
union_ok = lv_area_intersect(&mask_com, mask, coords);
if(union_ok == false) {
lv_fs_close(&file);
return;
}
uint8_t px_size = 0;
switch(img_data.header.format) {
case LV_IMG_FORMAT_FILE_RAW_RGB332:
px_size = 1;
break;
case LV_IMG_FORMAT_FILE_RAW_RGB565:
px_size = 2;
break;
case LV_IMG_FORMAT_FILE_RAW_RGB888:
px_size = 4;
break;
default:
return;
}
if(img_data.header.alpha_byte) { /*Correction with the alpha byte*/
px_size++;
if(img_data.header.format == LV_IMG_FORMAT_FILE_RAW_RGB888) px_size--; /*Stored in the 4 byte anyway*/
return true; /*Out of mask. There is nothing to draw so the image is drawn successfully.*/
}
uint8_t px_size = lv_img_color_format_get_px_size(header.color_format);
if(px_size == 0) return false;
/* Move the file pointer to the start address according to mask*/
uint32_t start_offset = sizeof(img_data.header);
uint32_t start_offset = sizeof(lv_img_header_t);
start_offset += (lv_area_get_width(coords)) * (mask_com.y1 - coords->y1) * px_size; /*First row*/
start_offset += (mask_com.x1 - coords->x1) * px_size; /*First col*/
lv_fs_seek(&file, start_offset);
@@ -116,10 +274,14 @@ void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
uint8_t buf[LV_VER_RES * ((LV_COLOR_DEPTH >> 8) + 1)];
# endif
#endif
bool chroma_keyed = lv_img_color_format_is_chroma_key(header.color_format);
bool alpha_byte = lv_img_color_format_has_alpha(header.color_format);
for(row = mask_com.y1; row <= mask_com.y2; row ++) {
res = lv_fs_read(&file, buf, useful_data, &br);
map_fp(&line, &mask_com, (uint8_t *)buf, opa, img_data.header.chroma_keyed, img_data.header.alpha_byte,
map_fp(&line, &mask_com, (uint8_t *)buf, opa, chroma_keyed, alpha_byte,
style->image.color, style->image.intense);
lv_fs_tell(&file, &act_pos);
@@ -129,26 +291,19 @@ void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
}
lv_fs_close(&file);
if(res != LV_FS_RES_OK) {
lv_draw_rect(coords, mask, &lv_style_plain, LV_OPA_COVER);
lv_draw_label(coords, mask, &lv_style_plain, LV_OPA_COVER, "No data", LV_TXT_FLAG_NONE, NULL);
}
}
#endif
} else {
const lv_img_t * img_var = src;
const lv_img_dsc_t * img_var = src;
lv_area_t mask_com; /*Common area of mask and coords*/
bool union_ok;
union_ok = lv_area_intersect(&mask_com, mask, coords);
if(union_ok == false) {
return; /*Out of mask*/
return true; /*Out of mask. There is nothing to draw so the image is drawn successfully.*/
}
map_fp(coords, mask, img_var->pixel_map, opa, img_var->header.chroma_keyed, img_var->header.alpha_byte, style->image.color, style->image.intense);
bool chroma_keyed = lv_img_color_format_is_chroma_key(img_var->header.color_format);
bool alpha_byte = lv_img_color_format_has_alpha(img_var->header.color_format);
map_fp(coords, mask, img_var->data, opa, chroma_keyed, alpha_byte, style->image.color, style->image.intense);
}
}
/**********************
* STATIC FUNCTIONS
**********************/

76
lv_draw/lv_draw_img.h
View File

@@ -22,6 +22,61 @@ extern "C" {
/**********************
* TYPEDEFS
**********************/
struct _lv_img_t;
typedef struct {
/* The first 8 bit is very important to distinguish the different source types.
* For more info see `lv_img_get_src_type()` in lv_img.c */
uint32_t color_format :5; /*See: lv_img_px_format*/
uint32_t always_zero :3; /*It the upper bits of the first byte*/
uint32_t compression :2;
uint32_t w:11; /*Width of the image map*/
uint32_t h:11; /*Height of the image map*/
}lv_img_header_t;
typedef enum {
LV_IMG_COMPRESSION_NONE,
LV_IMG_COMPRESSION_RLE, /*Run length encoded*/
LV_IMG_COMPRESSION_RESERVED1,
LV_IMG_COMPRESSION_RESERVED2
}lv_img_compression_t;
typedef enum {
LV_IMG_FORMAT_UNKOWN = 0,
LV_IMG_FORMAT_RAW, /*Contains the file's as it is. Needs custom decoder function*/
LV_IMG_FORMAT_TRUE_COLOR, /*Color format and depth should match with LV_COLOR settings*/
LV_IMG_FORMAT_TRUE_COLOR_ALPHA, /*Same as `LV_IMG_FORMAT_TRUE_COLOR` but every pixel has an alpha byte*/
LV_IMG_FORMAT_TRUE_COLOR_CHROMA_KEYED, /*Same as `LV_IMG_FORMAT_TRUE_COLOR` but LV_COLOR_TRANSP pixels will be transparent*/
LV_IMG_FORMAT_INDEXED_1BIT, /*Can have 2 different colors in a palette (always chroma keyed)*/
LV_IMG_FORMAT_INDEXED_2BIT, /*Can have 4 different colors in a palette (always chroma keyed)*/
LV_IMG_FORMAT_INDEXED_4BIT, /*Can have 16 different colors in a palette (always chroma keyed)*/
LV_IMG_FORMAT_INDEXED_8BIT, /*Can have 256 different colors in a palette (always chroma keyed)*/
LV_IMG_FORMAT_ALPHA_1BIT, /*Can have one color and it can be drawn or not*/
LV_IMG_FORMAT_ALPHA_2BIT, /*Can have one color but 4 different alpha value*/
LV_IMG_FORMAT_ALPHA_4BIT, /*Can have one color but 16 different alpha value*/
LV_IMG_FORMAT_ALPHA_8BIT, /*Can have one color but 256 different alpha value*/
LV_IMG_FORMAT_INDEXED_ALPHA_2BIT, /*Can have 2 different colors which are drawn or not*/
LV_IMG_FORMAT_INDEXED_ALPHA_4BIT, /*Can have 4 different colors but 4 different alpha value*/
LV_IMG_FORMAT_INDEXED_ALPHA_8BIT, /*Can have 16 different colors but 16 different alpha value*/
LV_IMG_FORMAT_INDEXED_ALPHA_16BIT, /*Can have 256 different colors but 256 different alpha value*/
} lv_img_color_format_t;
/* Image header it is compatible with
* the result image converter utility*/
typedef struct
{
lv_img_header_t header;
const uint8_t * data;
} lv_img_dsc_t;
/**********************
* GLOBAL PROTOTYPES
@@ -38,6 +93,27 @@ extern "C" {
void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
const void * src, const lv_style_t * style, lv_opa_t opa_scale);
bool lv_img_dsc_get_info(const char * src, lv_img_header_t * header, const lv_style_t * style);
uint8_t lv_img_color_format_get_px_size(lv_img_color_format_t cf);
bool lv_img_color_format_is_chroma_key(lv_img_color_format_t cf);
bool lv_img_color_format_has_alpha(lv_img_color_format_t cf);
/**
* Get the type of an image source
* @param src pointer to an image source:
* - pointer to an 'lv_img_t' variable (image stored internally and compiled into the code)
* - a path to a file (e.g. "S:/folder/image.bin")
* - or a symbol (e.g. SYMBOL_CLOSE)
* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKOWN
*/
lv_img_src_t lv_img_get_src_type(const void * src);
/**********************
* MACROS
**********************/

13
lv_draw/lv_draw_vbasic.c
View File

@@ -62,6 +62,9 @@ static void sw_color_fill(lv_area_t * mem_area, lv_color_t * mem, const lv_area_
*/
void lv_vpx(lv_coord_t x, lv_coord_t y, const lv_area_t * mask_p, lv_color_t color, lv_opa_t opa)
{
if(opa < LV_OPA_MIN) return;
if(opa > LV_OPA_MAX) opa = LV_OPA_COVER;
lv_vdb_t * vdb_p = lv_vdb_get();
/*Pixel out of the mask*/
@@ -100,6 +103,10 @@ void lv_vpx(lv_coord_t x, lv_coord_t y, const lv_area_t * mask_p, lv_color_t col
void lv_vfill(const lv_area_t * cords_p, const lv_area_t * mask_p,
lv_color_t color, lv_opa_t opa)
{
if(opa < LV_OPA_MIN) return;
if(opa > LV_OPA_MAX) opa = LV_OPA_COVER;
lv_area_t res_a;
bool union_ok;
lv_vdb_t * vdb_p = lv_vdb_get();
@@ -220,6 +227,9 @@ void lv_vletter(const lv_point_t * pos_p, const lv_area_t * mask_p,
204, 221, 238, 255
};
if(opa < LV_OPA_MIN) return;
if(opa > LV_OPA_MAX) opa = LV_OPA_COVER;
if(font_p == NULL) {
LV_LOG_WARN("Font: character's bitmap not found");
return;
@@ -357,6 +367,9 @@ void lv_vmap(const lv_area_t * cords_p, const lv_area_t * mask_p,
lv_color_t recolor, lv_opa_t recolor_opa)
{
if(opa < LV_OPA_MIN) return;
if(opa > LV_OPA_MAX) opa = LV_OPA_COVER;
lv_area_t masked_a;
bool union_ok;
lv_vdb_t * vdb_p = lv_vdb_get();

3
lv_misc/lv_color.h
View File

@@ -57,6 +57,9 @@ extern "C" {
#define LV_OPA_100 255
#define LV_OPA_COVER 255
#define LV_OPA_MIN 0 /*Opacities below this will be transparent*/
#define LV_OPA_MAX 255 /*Opacities above this will fully cover*/
#if LV_COLOR_DEPTH == 1
#define LV_COLOR_SIZE 8
#elif LV_COLOR_DEPTH == 8

103
lv_objx/lv_img.c
View File

@@ -72,10 +72,9 @@ lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
ext->cf = LV_IMG_FORMAT_UNKOWN;
ext->w = lv_obj_get_width(new_img);
ext->h = lv_obj_get_height(new_img);
ext->chroma_keyed = 0;
ext->alpha_byte = 0;
ext->auto_size = 1;
/*Init the new object*/
@@ -118,7 +117,7 @@ lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
*/
void lv_img_set_src(lv_obj_t * img, const void * src_img)
{
lv_img_src_t src_type = lv_img_get_src_type(src_img);
lv_img_src_t src_type = lv_img_src_get_type(src_img);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
@@ -127,6 +126,7 @@ void lv_img_set_src(lv_obj_t * img, const void * src_img)
#endif
/*If the new source type is unknown free the memories of the old source*/
if(src_type == LV_IMG_SRC_UNKNOWN) {
if(ext->src_type == LV_IMG_SRC_SYMBOL || ext->src_type == LV_IMG_SRC_FILE) {
lv_mem_free(ext->src);
@@ -136,72 +136,29 @@ void lv_img_set_src(lv_obj_t * img, const void * src_img)
return;
}
ext->src_type = src_type;
lv_img_header_t header;
lv_img_dsc_get_info(src_img, &header, lv_img_get_style(img));
/*Save the source*/
if(src_type == LV_IMG_SRC_VARIABLE) {
ext->src = src_img;
ext->w = ((lv_img_t *)src_img)->header.w;
ext->h = ((lv_img_t *)src_img)->header.h;
ext->chroma_keyed = ((lv_img_t *)src_img)->header.chroma_keyed;
ext->alpha_byte = ((lv_img_t *)src_img)->header.alpha_byte;
lv_obj_set_size(img, ext->w, ext->h);
}
#if USE_LV_FILESYSTEM
else if(src_type == LV_IMG_SRC_FILE) {
lv_fs_file_t file;
lv_fs_res_t res;
lv_img_t img_file_data;
uint32_t rn;
res = lv_fs_open(&file, src_img, LV_FS_MODE_RD);
if(res == LV_FS_RES_OK) {
res = lv_fs_read(&file, &img_file_data, sizeof(img_file_data), &rn);
}
/*Create a dummy header on fs error*/
if(res != LV_FS_RES_OK || rn != sizeof(img_file_data)) {
img_file_data.header.w = lv_obj_get_width(img);
img_file_data.header.h = lv_obj_get_height(img);
img_file_data.header.chroma_keyed = 0;
img_file_data.header.alpha_byte = 0;
}
lv_fs_close(&file);
ext->w = img_file_data.header.w;
ext->h = img_file_data.header.h;
ext->chroma_keyed = img_file_data.header.chroma_keyed;
ext->alpha_byte = img_file_data.header.alpha_byte;
else if(src_type == LV_IMG_SRC_FILE || src_type == LV_IMG_SRC_SYMBOL) {
/* If the new and the old src are the same then it was only a refresh.*/
if(ext->src != src_img) {
lv_mem_free(ext->src);
char * new_fn = lv_mem_alloc(strlen(src_img) + 1);
lv_mem_assert(new_fn);
if(new_fn == NULL) return;
strcpy(new_fn, src_img);
ext->src = new_fn;
char * new_str = lv_mem_alloc(strlen(src_img) + 1);
lv_mem_assert(new_str);
if(new_str == NULL) return;
strcpy(new_str, src_img);
ext->src = new_str;
}
}
}
}
#endif
else if(src_type == LV_IMG_SRC_SYMBOL) {
lv_style_t * style = lv_obj_get_style(img);
lv_point_t size;
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);
ext->w = size.x;
ext->h = size.y;
ext->chroma_keyed = 1; /*Symbols always have transparent parts, Important because of cover check in the design function*/
/* If the new and the old src are the same then it was only a refresh.*/
if(ext->src != src_img) {
lv_mem_free(ext->src);
char * new_txt = lv_mem_alloc(strlen(src_img) + 1);
lv_mem_assert(new_txt);
if(new_txt == NULL) return;
strcpy(new_txt, src_img);
ext->src = new_txt;
}
}
ext->src_type = src_type;
ext->w = header.w;
ext->h = header.h;
ext->cf = header.color_format;
if(lv_img_get_auto_size(img) != false) {
lv_obj_set_size(img, ext->w, ext->h);
@@ -228,26 +185,6 @@ void lv_img_set_auto_size(lv_obj_t * img, bool autosize_en)
* Getter functions
*====================*/
/**
* Get the type of an image source
* @param src pointer to an image source:
* - pointer to an 'lv_img_t' variable (image stored internally and compiled into the code)
* - a path to an file (e.g. "S:/folder/image.bin")
* - or a symbol (e.g. SYMBOL_CLOSE)
* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKOWN
*/
lv_img_src_t lv_img_get_src_type(const void * src)
{
if(src == NULL) return LV_IMG_SRC_UNKNOWN;
const uint8_t * u8_p = src;
/*The first byte shows the type of the image source*/
if(u8_p[0] >= 'A' && u8_p[0] <= 'Z') return LV_IMG_SRC_FILE; /*It's a driver letter*/
else if(((u8_p[0] & 0xFC) >> 2) == LV_IMG_FORMAT_INTERNAL_RAW) return LV_IMG_SRC_VARIABLE; /*Mask the file format part og of lv_img_t header. IT should be 0 which means C array */
else if(u8_p[0] >= ' ') return LV_IMG_SRC_SYMBOL; /*Other printable characters are considered symbols*/
else return LV_IMG_SRC_UNKNOWN;
}
/**
* Get the source of the image
@@ -310,9 +247,9 @@ static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode
bool cover = false;
if(ext->src_type == LV_IMG_SRC_UNKNOWN || ext->src_type == LV_IMG_SRC_SYMBOL) return false;
if(ext->chroma_keyed == 0 && ext->alpha_byte == 0) cover = lv_area_is_in(mask, &img->coords);
return cover;
if(ext->cf == LV_IMG_FORMAT_TRUE_COLOR) cover = lv_area_is_in(mask, &img->coords);
return cover;
} else if(mode == LV_DESIGN_DRAW_MAIN) {
if(ext->h == 0 || ext->w == 0) return true;
lv_area_t coords;

15
lv_objx/lv_img.h
View File

@@ -45,8 +45,7 @@ typedef struct
lv_coord_t h; /*Height of the image (Handled by the library)*/
uint8_t src_type :2; /*See: lv_img_src_t*/
uint8_t auto_size :1; /*1: automatically set the object size to the image size*/
uint8_t chroma_keyed :1; /*1: Chroma keyed image, LV_COLOR_TRANSP (lv_conf.h) pixels will be transparent (Handled by the library)*/
uint8_t alpha_byte :1; /*1: Extra byte for every pixel to define opacity*/
uint8_t cf :5; /*Color format from `lv_img_color_format_t`*/
} lv_img_ext_t;
/**********************
@@ -115,16 +114,6 @@ static inline void lv_img_set_upscale(lv_obj_t * img, bool upcale)
* Getter functions
*====================*/
/**
* Get the type of an image source
* @param src pointer to an image source:
* - pointer to an 'lv_img_t' variable (image stored internally and compiled into the code)
* - a path to an file (e.g. "S:/folder/image.bin")
* - or a symbol (e.g. SYMBOL_CLOSE)
* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKOWN
*/
lv_img_src_t lv_img_get_src_type(const void * src);
/**
* Get the source of the image
* @param img pointer to an image object
@@ -171,7 +160,7 @@ static inline bool lv_img_get_upscale(const lv_obj_t * img)
**********************/
/*Use this macro to declare an image in a c file*/
#define LV_IMG_DECLARE(var_name) extern const lv_img_t var_name;
#define LV_IMG_DECLARE(var_name) extern const lv_img_dsc_t var_name;
#endif /*USE_LV_IMG*/