From 6939e4f12e9d5b6c69aa994bbd6fc4046f8941e5 Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodarima@gmail.com>
Date: Sun, 24 Nov 2024 18:33:38 +0100
Subject: Report if WebP is enabled and the version

---
 src/dwebp.h    |  1 +
 src/version.cc | 10 ++++++++++
 src/webp.c     | 19 +++++++++++++++++++
 3 files changed, 30 insertions(+)

(limited to 'src')

diff --git a/src/dwebp.h b/src/dwebp.h
index 930380b0..11718456 100644
--- a/src/dwebp.h
+++ b/src/dwebp.h
@@ -11,6 +11,7 @@ extern "C" {
 
 void *a_Webp_new(DilloImage *Image, DilloUrl *url, int version);
 void a_Webp_callback(int Op, void *data);
+const char *a_Webp_version(char *buf, int n);
 
 
 #ifdef __cplusplus
diff --git a/src/version.cc b/src/version.cc
index 417a1807..f0dc9e93 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -21,6 +21,7 @@
 
 #include "djpeg.h"
 #include "dpng.h"
+#include "dwebp.h"
 #include "IO/tls.h"
 
 #include <FL/Fl.H>
@@ -53,6 +54,10 @@ static void print_libs()
    printf(" png/%s", a_Png_version());
 #endif
 
+#ifdef ENABLE_WEBP
+   printf(" webp/%s", a_Webp_version(buf, 256));
+#endif
+
 #ifdef ENABLE_TLS
    /* TLS prints the name/version format, as it determines which SSL
     * library is in use */
@@ -85,6 +90,11 @@ static void print_features()
 #else
          " -SVG"
 #endif
+#ifdef ENABLE_WEBP
+         " +WEBP"
+#else
+         " -WEBP"
+#endif
 #if !( defined(DISABLE_XEMBED) || defined(WIN32) || defined(__APPLE__) )
          " +XEMBED"
 #else
diff --git a/src/webp.c b/src/webp.c
index ebcc238a..bd0ad88d 100644
--- a/src/webp.c
+++ b/src/webp.c
@@ -2,6 +2,7 @@
  * File: webp.c
  *
  * Copyright (C) 2024 dogma
+ * Copyright (C) 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -172,6 +173,23 @@ void a_Webp_callback(int Op, void *data)
    }
 }
 
+const char *a_Webp_version(char *buf, int n)
+{
+   /* Return the decoder's version number, packed in
+    * hexadecimal using 8bits for each of major/minor/revision.
+    * E.g: v2.5.7 is 0x020507. */
+   int ver = WebPGetDecoderVersion();
+
+   int major = (ver >> 16) & 0xff;
+   int minor = (ver >>  8) & 0xff;
+   int rev   = (ver >>  0) & 0xff;
+
+   int k = snprintf(buf, n, "%d.%d.%d", major, minor, rev);
+   if (k >= n)
+      return "?";
+   return buf;
+}
+
 /*
  * Create the image state data that must be kept between calls
  */
@@ -197,5 +215,6 @@ void *a_Webp_new(DilloImage *Image, DilloUrl *url, int version)
 
 void *a_Webp_new() { return 0; }
 void a_Webp_callback() { return; }
+const char *a_Webp_version(char *buf, int n) { return NULL; }
 
 #endif /* ENABLE_WEBP */
-- 
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