Code snippet for image resize
How to reduce image size. New size is size/4.
Here ad->fileList[ad->curIndex] is some char string with path to file. Privilege http://tizen.org/privilege/mediastorage should be added in manifest.
typedef struct appdata {
//…
int width;
int height;
media_packet_h mediaPcktPtr;
//…
} appdata_s;
int finalize_callback(media_packet_h packet, int err, void* userdata)
{
return MEDIA_PACKET_FINALIZE;
}
Evas_Event_Flags on_click_resize_start(void *data, void *event_info)
{
appdata_s *ad = (appdata_s *)data;
void* src_ptr;
media_format_h fmt;
media_packet_h src;
transformation_h handle;
image_util_transform_create(&handle);
unsigned char *img_source = NULL;
int width = 0, height = 0;
unsigned int size_decode = 0;
image_util_decode_jpeg( ad->array[ad->curIndex], (image_util_colorspace_e)IMAGE_UTIL_COLORSPACE_RGB888, &img_source, &width, &height, &size_decode);
ad->width =width/4;
ad->height =height/4;
media_format_create(&fmt);
media_format_set_video_mime(fmt, MEDIA_FORMAT_RGB888);
media_format_set_video_width(fmt, width);
media_format_set_video_height(fmt, height);
media_packet_create_alloc(fmt, finalize_callback, NULL, &src);
image_util_transform_set_resolution(handle, ad->width, ad->height);
media_packet_get_buffer_data_ptr(src, &src_ptr);
memcpy(src_ptr, img_source, size_decode);
free(img_source);
image_util_transform_run(handle, src , (image_util_transform_completed_cb)completed_resize_callback, ad);
ad->mediaPcktPtr = src;
image_util_transform_destroy(handle);
return EVAS_EVENT_FLAG_NONE;
}
static void completed_resize_callback(media_packet_h *dst, int error_code, void *user_data)
{
appdata_s *ad = (appdata_s *)user_data;
void * ptr;
media_packet_get_buffer_data_ptr(*dst, &ptr);
image_util_encode_jpeg((unsigned char*)ptr, ad->width, ad->height
, IMAGE_UTIL_COLORSPACE_RGB888, 100, "/opt/usr/media/resized.jpg");
media_packet_destroy(*dst);
media_packet_destroy(ad->mediaPcktPtr);
}