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lvgl/src/lv_draw/lv_draw_img.c
Gabor Kiss-Vamosi 41907f9f3c run astyle code formatter
2020-02-26 19:48:27 +01:00

538 lines
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/**
* @file lv_draw_img.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_draw_img.h"
#include "lv_img_cache.h"
#include "../lv_hal/lv_hal_disp.h"
#include "../lv_misc/lv_log.h"
#include "../lv_core/lv_refr.h"
#include "../lv_misc/lv_mem.h"
#include "../lv_misc/lv_math.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
lv_draw_img_dsc_t * draw_dsc);
static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
lv_draw_img_dsc_t * draw_dsc,
bool chroma_key, bool alpha_byte);
void show_error(const lv_area_t * coords, const lv_area_t * clip_area, const char * msg);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_draw_img_dsc_init(lv_draw_img_dsc_t * dsc)
{
memset(dsc, 0x00, sizeof(lv_draw_img_dsc_t));
dsc->recolor = LV_COLOR_BLACK;
dsc->opa = LV_OPA_COVER;
dsc->zoom = LV_IMG_ZOOM_NONE;
dsc->antialias = LV_ANTIALIAS;
}
/**
* Draw an image
* @param coords the coordinates of the image
* @param mask the image will be drawn only in this area
* @param src pointer to a lv_color_t array which contains the pixels of the image
* @param style style of the image
* @param angle rotation angle of the image
* @param center rotation center of the image
* @param antialias anti-alias transformations (rotate, zoom) or not
* @param opa_scale scale down all opacities by the factor
*/
void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask, const void * src, lv_draw_img_dsc_t * dsc)
{
if(src == NULL) {
LV_LOG_WARN("Image draw: src is NULL");
show_error(coords, mask, "No\ndata");
return;
}
if(dsc->opa <= LV_OPA_MIN) return;
lv_res_t res;
res = lv_img_draw_core(coords, mask, src, dsc);
if(res == LV_RES_INV) {
LV_LOG_WARN("Image draw error");
show_error(coords, mask, "No\ndata");
return;
}
}
/**
* Get the pixel size of a color format in bits
* @param cf a color format (`LV_IMG_CF_...`)
* @return the pixel size in bits
*/
uint8_t lv_img_cf_get_px_size(lv_img_cf_t cf)
{
uint8_t px_size = 0;
switch(cf) {
case LV_IMG_CF_UNKNOWN:
case LV_IMG_CF_RAW:
px_size = 0;
break;
case LV_IMG_CF_TRUE_COLOR:
case LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED:
px_size = LV_COLOR_SIZE;
break;
case LV_IMG_CF_TRUE_COLOR_ALPHA:
px_size = LV_IMG_PX_SIZE_ALPHA_BYTE << 3;
break;
case LV_IMG_CF_INDEXED_1BIT:
case LV_IMG_CF_ALPHA_1BIT:
px_size = 1;
break;
case LV_IMG_CF_INDEXED_2BIT:
case LV_IMG_CF_ALPHA_2BIT:
px_size = 2;
break;
case LV_IMG_CF_INDEXED_4BIT:
case LV_IMG_CF_ALPHA_4BIT:
px_size = 4;
break;
case LV_IMG_CF_INDEXED_8BIT:
case LV_IMG_CF_ALPHA_8BIT:
px_size = 8;
break;
default:
px_size = 0;
break;
}
return px_size;
}
/**
* Check if a color format is chroma keyed or not
* @param cf a color format (`LV_IMG_CF_...`)
* @return true: chroma keyed; false: not chroma keyed
*/
bool lv_img_cf_is_chroma_keyed(lv_img_cf_t cf)
{
bool is_chroma_keyed = false;
switch(cf) {
case LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED:
case LV_IMG_CF_RAW_CHROMA_KEYED:
#if LV_INDEXED_CHROMA
case LV_IMG_CF_INDEXED_1BIT:
case LV_IMG_CF_INDEXED_2BIT:
case LV_IMG_CF_INDEXED_4BIT:
case LV_IMG_CF_INDEXED_8BIT:
#endif
is_chroma_keyed = true;
break;
default:
is_chroma_keyed = false;
break;
}
return is_chroma_keyed;
}
/**
* Check if a color format has alpha channel or not
* @param cf a color format (`LV_IMG_CF_...`)
* @return true: has alpha channel; false: doesn't have alpha channel
*/
bool lv_img_cf_has_alpha(lv_img_cf_t cf)
{
bool has_alpha = false;
switch(cf) {
case LV_IMG_CF_TRUE_COLOR_ALPHA:
case LV_IMG_CF_RAW_ALPHA:
case LV_IMG_CF_INDEXED_1BIT:
case LV_IMG_CF_INDEXED_2BIT:
case LV_IMG_CF_INDEXED_4BIT:
case LV_IMG_CF_INDEXED_8BIT:
case LV_IMG_CF_ALPHA_1BIT:
case LV_IMG_CF_ALPHA_2BIT:
case LV_IMG_CF_ALPHA_4BIT:
case LV_IMG_CF_ALPHA_8BIT:
has_alpha = true;
break;
default:
has_alpha = false;
break;
}
return has_alpha;
}
/**
* 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. LV_SYMBOL_CLOSE)
* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKNOWN
*/
lv_img_src_t lv_img_src_get_type(const void * src)
{
lv_img_src_t img_src_type = LV_IMG_SRC_UNKNOWN;
if(src == NULL) return img_src_type;
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) {
img_src_type = LV_IMG_SRC_FILE; /*If it's an ASCII character then it's file name*/
}
else if(u8_p[0] >= 0x80) {
img_src_type = LV_IMG_SRC_SYMBOL; /*Symbols begins after 0x7F*/
}
else {
img_src_type = LV_IMG_SRC_VARIABLE; /*`lv_img_dsc_t` is design to the first byte < 0x20*/
}
if(LV_IMG_SRC_UNKNOWN == img_src_type) {
LV_LOG_WARN("lv_img_src_get_type: unknown image type");
}
return img_src_type;
}
/**********************
* STATIC FUNCTIONS
**********************/
static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
lv_draw_img_dsc_t * draw_dsc)
{
if(draw_dsc->opa <= LV_OPA_MIN) return LV_RES_OK;
lv_img_cache_entry_t * cdsc = lv_img_cache_open(src, draw_dsc->recolor);
if(cdsc == NULL) return LV_RES_INV;
bool chroma_keyed = lv_img_cf_is_chroma_keyed(cdsc->dec_dsc.header.cf);
bool alpha_byte = lv_img_cf_has_alpha(cdsc->dec_dsc.header.cf);
if(cdsc->dec_dsc.error_msg != NULL) {
LV_LOG_WARN("Image draw error");
show_error(coords, mask, cdsc->dec_dsc.error_msg);
}
/* The decoder could open the image and gave the entire uncompressed image.
* Just draw it!*/
else if(cdsc->dec_dsc.img_data) {
lv_area_t map_area_rot;
lv_area_copy(&map_area_rot, coords);
if(draw_dsc->angle || draw_dsc->zoom != LV_IMG_ZOOM_NONE) {
int32_t w = lv_area_get_width(coords);
int32_t h = lv_area_get_height(coords);
lv_img_buf_get_transformed_area(&map_area_rot, w, h, draw_dsc->angle, draw_dsc->zoom, &draw_dsc->pivot);
map_area_rot.x1 += coords->x1;
map_area_rot.y1 += coords->y1;
map_area_rot.x2 += coords->x1;
map_area_rot.y2 += coords->y1;
}
lv_area_t mask_com; /*Common area of mask and coords*/
bool union_ok;
union_ok = lv_area_intersect(&mask_com, mask, &map_area_rot);
if(union_ok == false) {
return LV_RES_OK; /*Out of mask. There is nothing to draw so the image is drawn
successfully.*/
}
lv_draw_map(coords, &mask_com, cdsc->dec_dsc.img_data, draw_dsc, chroma_keyed, alpha_byte);
}
/* The whole uncompressed image is not available. Try to read it line-by-line*/
else {
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 LV_RES_OK; /*Out of mask. There is nothing to draw so the image is drawn
successfully.*/
}
int32_t width = lv_area_get_width(&mask_com);
uint8_t * buf = lv_mem_buf_get(lv_area_get_width(&mask_com) *
LV_IMG_PX_SIZE_ALPHA_BYTE); /*+1 because of the possible alpha byte*/
lv_area_t line;
lv_area_copy(&line, &mask_com);
lv_area_set_height(&line, 1);
int32_t x = mask_com.x1 - coords->x1;
int32_t y = mask_com.y1 - coords->y1;
int32_t row;
lv_res_t read_res;
for(row = mask_com.y1; row <= mask_com.y2; row++) {
lv_area_t mask_line;
union_ok = lv_area_intersect(&mask_line, mask, &line);
if(union_ok == false) continue;
read_res = lv_img_decoder_read_line(&cdsc->dec_dsc, x, y, width, buf);
if(read_res != LV_RES_OK) {
lv_img_decoder_close(&cdsc->dec_dsc);
LV_LOG_WARN("Image draw can't read the line");
lv_mem_buf_release(buf);
return LV_RES_INV;
}
lv_draw_map(&line, &mask_line, buf, draw_dsc, chroma_keyed, alpha_byte);
line.y1++;
line.y2++;
y++;
}
lv_mem_buf_release(buf);
}
return LV_RES_OK;
}
/**
* Draw a color map to the display (image)
* @param cords_p coordinates the color map
* @param mask_p the map will drawn only on this area (truncated to VDB area)
* @param map_p pointer to a lv_color_t array
* @param opa opacity of the map
* @param chroma_keyed true: enable transparency of LV_IMG_LV_COLOR_TRANSP color pixels
* @param alpha_byte true: extra alpha byte is inserted for every pixel
* @param style style of the image
* @param angle angle in degree
* @param pivot center of rotation
* @param zoom zoom factor
* @param antialias anti-alias transformations (rotate, zoom) or not
*/
static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
lv_draw_img_dsc_t * draw_dsc, bool chroma_key, bool alpha_byte)
{
/* Use the clip area as draw area*/
lv_area_t draw_area;
lv_area_copy(&draw_area, clip_area);
lv_disp_t * disp = lv_refr_get_disp_refreshing();
lv_disp_buf_t * vdb = lv_disp_get_buf(disp);
const lv_area_t * disp_area = &vdb->area;
/* Now `draw_area` has absolute coordinates.
* Make it relative to `disp_area` to simplify draw to `disp_buf`*/
draw_area.x1 -= disp_area->x1;
draw_area.y1 -= disp_area->y1;
draw_area.x2 -= disp_area->x1;
draw_area.y2 -= disp_area->y1;
uint8_t other_mask_cnt = lv_draw_mask_get_cnt();
/*The simplest case just copy the pixels into the VDB*/
if(other_mask_cnt == 0 && draw_dsc->angle == 0 && draw_dsc->zoom == LV_IMG_ZOOM_NONE &&
chroma_key == false && alpha_byte == false &&
draw_dsc->opa == LV_OPA_COVER && draw_dsc->recolor_opa == LV_OPA_TRANSP) {
lv_blend_map(clip_area, map_area, (lv_color_t *)map_p, NULL, LV_DRAW_MASK_RES_FULL_COVER, LV_OPA_COVER,
draw_dsc->blend_mode);
}
/*In the other cases every pixel need to be checked one-by-one*/
else {
/*The pixel size in byte is different if an alpha byte is added too*/
uint8_t px_size_byte = alpha_byte ? LV_IMG_PX_SIZE_ALPHA_BYTE : sizeof(lv_color_t);
/*Build the image and a mask line-by-line*/
uint32_t mask_buf_size = lv_area_get_size(&draw_area) > LV_HOR_RES_MAX ? LV_HOR_RES_MAX : lv_area_get_size(&draw_area);
lv_color_t * map2 = lv_mem_buf_get(mask_buf_size * sizeof(lv_color_t));
lv_opa_t * mask_buf = lv_mem_buf_get(mask_buf_size);
/*Go to the first displayed pixel of the map*/
int32_t map_w = lv_area_get_width(map_area);
int32_t map_h = lv_area_get_height(map_area);
const uint8_t * map_buf_tmp = map_p;
map_buf_tmp += map_w * (draw_area.y1 - (map_area->y1 - disp_area->y1)) * px_size_byte;
map_buf_tmp += (draw_area.x1 - (map_area->x1 - disp_area->x1)) * px_size_byte;
lv_color_t c;
lv_color_t chroma_keyed_color = LV_COLOR_TRANSP;
uint32_t px_i = 0;
const uint8_t * map_px;
lv_area_t blend_area;
blend_area.x1 = draw_area.x1 + disp_area->x1;
blend_area.x2 = blend_area.x1 + lv_area_get_width(&draw_area) - 1;
blend_area.y1 = disp_area->y1 + draw_area.y1;
blend_area.y2 = blend_area.y1;
/*Prepare the `mask_buf`if there are other masks*/
if(other_mask_cnt) {
memset(mask_buf, 0xFF, mask_buf_size);
}
bool transform = draw_dsc->angle != 0 || draw_dsc->zoom != LV_IMG_ZOOM_NONE ? true : false;
lv_img_transform_dsc_t trans_dsc;
memset(&trans_dsc, 0, sizeof(lv_img_transform_dsc_t));
if(transform) {
lv_img_cf_t cf = LV_IMG_CF_TRUE_COLOR;
if(alpha_byte) cf = LV_IMG_CF_TRUE_COLOR_ALPHA;
else if(chroma_key) cf = LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED;
trans_dsc.cfg.angle = draw_dsc->angle;
trans_dsc.cfg.zoom = draw_dsc->zoom;
trans_dsc.cfg.src = map_p;
trans_dsc.cfg.src_w = map_w;
trans_dsc.cfg.src_h = map_h;
trans_dsc.cfg.cf = cf;
trans_dsc.cfg.pivot_x = draw_dsc->pivot.x;
trans_dsc.cfg.pivot_y = draw_dsc->pivot.y;
trans_dsc.cfg.color = draw_dsc->recolor;
trans_dsc.cfg.antialias = draw_dsc->antialias;
lv_img_buf_transform_init(&trans_dsc);
}
lv_draw_mask_res_t mask_res;
mask_res = (alpha_byte || chroma_key || draw_dsc->angle) ? LV_DRAW_MASK_RES_CHANGED : LV_DRAW_MASK_RES_FULL_COVER;
int32_t x;
int32_t y;
for(y = 0; y < lv_area_get_height(&draw_area); y++) {
map_px = map_buf_tmp;
uint32_t px_i_start = px_i;
for(x = 0; x < lv_area_get_width(&draw_area); x++, map_px += px_size_byte, px_i++) {
if(transform == false) {
if(alpha_byte) {
lv_opa_t px_opa = map_px[LV_IMG_PX_SIZE_ALPHA_BYTE - 1];
mask_buf[px_i] = px_opa;
if(px_opa < LV_OPA_MIN) {
#if LV_COLOR_DEPTH == 32
map2[px_i].ch.alpha = 0xFF;
#endif
continue;
}
}
else {
mask_buf[px_i] = LV_OPA_COVER;
}
#if LV_COLOR_DEPTH == 8
c.full = map_px[0];
#elif LV_COLOR_DEPTH == 16
c.full = map_px[0] + (map_px[1] << 8);
#elif LV_COLOR_DEPTH == 32
c.full = *((uint32_t *)map_px);
#endif
if(chroma_key) {
if(c.full == chroma_keyed_color.full) {
mask_buf[px_i] = LV_OPA_TRANSP;
continue;
}
}
}
else {
/*Rotate*/
bool ret;
int32_t rot_x = x + (disp_area->x1 + draw_area.x1) - map_area->x1;
int32_t rot_y = y + (disp_area->y1 + draw_area.y1) - map_area->y1;
ret = lv_img_buf_transform(&trans_dsc, rot_x, rot_y);
if(ret == false) {
mask_buf[px_i] = LV_OPA_TRANSP;
continue;
}
else {
mask_buf[px_i] = trans_dsc.res.opa;
c.full = trans_dsc.res.color.full;
}
}
if(draw_dsc->recolor_opa != 0) {
c = lv_color_mix(draw_dsc->recolor, c, draw_dsc->recolor_opa);
}
map2[px_i].full = c.full;
}
/*Apply the masks if any*/
if(other_mask_cnt) {
lv_draw_mask_res_t mask_res_sub;
mask_res_sub = lv_draw_mask_apply(mask_buf + px_i_start, draw_area.x1 + vdb->area.x1, y + draw_area.y1 + vdb->area.y1,
lv_area_get_width(&draw_area));
if(mask_res_sub == LV_DRAW_MASK_RES_FULL_TRANSP) {
memset(mask_buf + px_i_start, 0x00, lv_area_get_width(&draw_area));
mask_res = LV_DRAW_MASK_RES_CHANGED;
}
else if(mask_res_sub == LV_DRAW_MASK_RES_CHANGED) {
mask_res = LV_DRAW_MASK_RES_CHANGED;
}
}
map_buf_tmp += map_w * px_size_byte;
if(px_i + lv_area_get_width(&draw_area) < mask_buf_size) {
blend_area.y2 ++;
}
else {
lv_blend_map(clip_area, &blend_area, map2, mask_buf, mask_res, draw_dsc->opa, draw_dsc->blend_mode);
blend_area.y1 = blend_area.y2 + 1;
blend_area.y2 = blend_area.y1;
px_i = 0;
mask_res = (alpha_byte || chroma_key || draw_dsc->angle) ? LV_DRAW_MASK_RES_CHANGED : LV_DRAW_MASK_RES_FULL_COVER;
/*Prepare the `mask_buf`if there are other masks*/
if(other_mask_cnt) {
memset(mask_buf, 0xFF, mask_buf_size);
}
}
}
/*Flush the last part*/
if(blend_area.y1 != blend_area.y2) {
blend_area.y2--;
lv_blend_map(clip_area, &blend_area, map2, mask_buf, mask_res, draw_dsc->opa, draw_dsc->blend_mode);
}
lv_mem_buf_release(mask_buf);
lv_mem_buf_release(map2);
}
}
void show_error(const lv_area_t * coords, const lv_area_t * clip_area, const char * msg)
{
lv_draw_rect_dsc_t rect_dsc;
lv_draw_rect_dsc_init(&rect_dsc);
rect_dsc.bg_color = LV_COLOR_WHITE;
lv_draw_rect(coords, clip_area, &rect_dsc);
lv_draw_label_dsc_t label_dsc;
lv_draw_label_dsc_init(&label_dsc);
lv_draw_label(coords, clip_area, &label_dsc, msg, NULL);
}
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