Convert a GIF to PNG Format in C/C++

Image format conversions can be a tedious and time-consuming process, and we all know that no one is excited about the prospect of spending all day on the manual task. So if you have a GIF that needs to be transformed into a PNG, why not make the jump between formats faster and more efficient? In the following tutorial, I will be showing you how to use an API in C/C++ to automate the conversion process with just a few lines of code and your input file.

Let’s start by installing libcurl into your C/C++ project:

libcurl/7.75.0

Once the installation is complete, we can call our image conversion function with the following code:

CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
     curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
     curl_easy_setopt(curl, CURLOPT_URL, "https://api.cloudmersive.com/image/convert/to/png");
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
     curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
     struct curl_slist *headers = NULL;
     headers = curl_slist_append(headers, "Content-Type: multipart/form-data");
     headers = curl_slist_append(headers, "Apikey: YOUR-API-KEY-HERE");
     curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
     curl_mime *mime;
     curl_mimepart *part;
     mime = curl_mime_init(curl);
     part = curl_mime_addpart(mime);
     curl_mime_name(part, "imageFile");
     curl_mime_filedata(part, "/path/to/file");
     curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
     res = curl_easy_perform(curl);
     curl_mime_free(mime);
}
curl_easy_cleanup(curl);

And just like that, the process is complete and your PNG file will be available for download.