image tool: Better color state support

Show custom color states with their cicp tuple, and recognize
the name "jpeg".

tools/gtk-image-tool-info.c

@@ -48,12 +48,23 @@ static void
 file_info (const char *filename)
 {
   GdkTexture *texture;
+  char *name;
+  char *cicp;
 
   texture = load_image_file (filename);
 
   g_print ("%s %dx%d\n", _("Size:"), gdk_texture_get_width (texture), gdk_texture_get_height (texture));
   g_print ("%s %s\n", _("Format:"), get_format_name (gdk_texture_get_format (texture)));
-  g_print ("%s %s\n", _("Color state:"), get_color_state_name (gdk_texture_get_color_state (texture)));
+
+  name = get_color_state_name (gdk_texture_get_color_state (texture));
+  cicp = get_color_state_cicp (gdk_texture_get_color_state (texture));
+
+  if (name && cicp)
+    g_print ("%s %s (cicp %s)\n", _("Color state:"), name, cicp);
+  else if (cicp)
+    g_print ("%s cicp %s\n", _("Color state:"), cicp);
+  else
+    g_print ("%s %s\n", _("Color state:"), _("unknown"));
 
   g_object_unref (texture);
 }

tools/gtk-image-tool-utils.c

@@ -149,6 +149,17 @@ find_color_state_by_name (const char *name)
       gdk_cicp_params_set_matrix_coefficients (params, 6);
       gdk_cicp_params_set_range (params, GDK_CICP_RANGE_NARROW);
 
+      color_state = gdk_cicp_params_build_color_state (params, &error);
+    }
+  else if (g_strcmp0 (name, "jpeg") == 0)
+    {
+      params = gdk_cicp_params_new ();
+
+      gdk_cicp_params_set_color_primaries (params, 1);
+      gdk_cicp_params_set_transfer_function (params, 13);
+      gdk_cicp_params_set_matrix_coefficients (params, 6);
+      gdk_cicp_params_set_range (params, GDK_CICP_RANGE_FULL);
+
       color_state = gdk_cicp_params_build_color_state (params, &error);
     }
   else if (g_strcmp0 (name, "bt709") == 0)
@@ -181,13 +192,34 @@ get_color_state_names (void)
   static const char *names[] = {
     "srgb", "srgb-linear", "display-p3", "rec2020",
     "rec2100-pq", "rec2100-linear", "rec2100-hlg",
-    "yuv", "bt601", "bt709",
+    "yuv", "jpeg", "bt601", "bt709",
     NULL,
   };
 
   return g_strdupv ((char **) names);
 }
 
+char *
+get_color_state_cicp (GdkColorState *color_state)
+{
+  GdkCicpParams *params;
+  char *str = NULL;
+
+  params = gdk_color_state_create_cicp_params (color_state);
+
+  if (params)
+    {
+      str = g_strdup_printf ("%u/%u/%u/%u",
+                              gdk_cicp_params_get_color_primaries (params),
+                              gdk_cicp_params_get_transfer_function (params),
+                              gdk_cicp_params_get_matrix_coefficients (params),
+                              gdk_cicp_params_get_range (params));
+      g_object_unref (params);
+    }
+
+  return str;
+}
+
 char *
 get_color_state_name (GdkColorState *color_state)
 {

tools/gtk-image-tool.h

@@ -17,6 +17,7 @@ GdkColorState * find_color_state_by_name (const char      *name);
 
 char **         get_color_state_names    (void);
 char *          get_color_state_name     (GdkColorState   *color_state);
+char *          get_color_state_cicp     (GdkColorState   *color_state);
 
 GdkColorState  *parse_cicp_tuple         (const char      *cicp_tuple,
                                           GError         **error);