Ret invert(Iterator* forward, Iterator* backward)
{
void* data1 = NULL;
void* data2 = NULL;
return_val_if_fail(forward != NULL && backward != NULL, RET_INVALID_PARAMS);
for (; iterator_offset(forward) < iterator_offset(backward);
iterator_next(forward), iterator_prev(backward)) {
iterator_get(forward, &data1);
iterator_get(backward, &data2);
iterator_set(forward, data2);
iterator_set(backward, data1);
}
return RET_OK;
}
void imlib_binary(image_t *img, list_t *thresholds, bool invert, bool zero)
{
for (list_lnk_t *it = iterator_start_from_head(thresholds); it; it = iterator_next(it)) {
color_thresholds_list_lnk_data_t lnk_data;
iterator_get(thresholds, it, &lnk_data);
switch(img->bpp) {
case IMAGE_BPP_BINARY: {
break;
}
case IMAGE_BPP_GRAYSCALE: {
if (!zero) {
for (uint8_t *start = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, 0),
*end = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, img->h);
start < end; start++) {
*start = COLOR_THRESHOLD_GRAYSCALE(*start, &lnk_data, invert)
? COLOR_GRAYSCALE_BINARY_MAX : COLOR_GRAYSCALE_BINARY_MIN;
}
} else {
for (uint8_t *start = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, 0),
*end = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, img->h);
start < end; start++) {
if (COLOR_THRESHOLD_GRAYSCALE(*start, &lnk_data, invert)) *start =
COLOR_GRAYSCALE_BINARY_MIN;
}
}
break;
}
case IMAGE_BPP_RGB565: {
if (!zero) {
for (uint16_t *start = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, 0),
*end = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, img->h);
start < end; start++) {
*start = COLOR_THRESHOLD_RGB565(*start, &lnk_data, invert)
? COLOR_RGB565_BINARY_MAX : COLOR_RGB565_BINARY_MIN;
}
} else {
for (uint16_t *start = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, 0),
*end = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, img->h);
start < end; start++) {
if (COLOR_THRESHOLD_RGB565(*start, &lnk_data, invert)) *start =
COLOR_RGB565_BINARY_MIN;
}
}
break;
}
default: {
break;
}
}
}
}
