switch from AMPAS_DATA_PATH to RAWTOACES_DATA_PATH

Author: antond-weta

README.md

@@ -242,7 +242,7 @@ By default, `rawtoaces` will determine the adopted white by finding the set of w
 
 	$ rawtoaces --wb-method 1 D60 --mat-method 0 input.raw
 
-You can use the environment varilable of `AMPAS_DATA_PATH` to specify the repository for your own datasets. If you have spectral sensitivity data for your camera but it is not included with `rawtoaces` you may place that data in `/usr/local/include/rawtoaces/data/camera` or place the data in the folder pointed by `AMPAS_DATA_PATH`.
+You can use the environment variable of `RAWTOACES_DATA_PATH` to specify the repository for your own datasets. If you have spectral sensitivity data for your camera but it is not included with `rawtoaces` you may place that data in `/usr/local/include/rawtoaces/data/camera` or place the data in the folder pointed by `RAWTOACES_DATA_PATH`. The rawtoaces versions prior to v1.1 used the environment variable `AMPAS_DATA_PATH`, the old name is still supported for backward compatibility. If both variables are present, `RAWTOACES_DATA_PATH` takes priority.
 
 
 #### Spectral Datasets

include/rawtoaces/define.h

@@ -343,10 +343,14 @@ inline vector<string> openDir( string path = "." )
 {
     vector<string> paths;
 
-    for ( auto &i: boost::filesystem::directory_iterator( path ) )
+    if ( boost::filesystem::exists( path ) )
     {
-        if ( i.status().type() != boost::filesystem::file_type::directory_file )
-            paths.push_back( i.path().string() );
+        for ( auto &i: boost::filesystem::directory_iterator( path ) )
+        {
+            if ( i.status().type() !=
+                 boost::filesystem::file_type::directory_file )
+                paths.push_back( i.path().string() );
+        }
     }
 
     return paths;
@@ -448,7 +452,11 @@ inline dataPath &pathsFinder()
         const char *env;
 
         vector<string> &PATHs = cdp.paths;
-        env                   = getenv( "AMPAS_DATA_PATH" );
+
+        env = getenv( "RAWTOACES_DATA_PATH" );
+        if ( !env )
+            // Fallback to the old environment variable.
+            env = getenv( "AMPAS_DATA_PATH" );
 
         if ( env )
             path = env;

src/rawtoaces_util/acesrender.cpp

@@ -97,7 +97,7 @@ void usage( const char *prog )
         "                            3=Average a grey box for white balance <x y w h>\n"
         "                            4=Use custom white balance  <r g b g>\n"
         "                            (default = 0)\n"
-        "  --mat-method [0-2]      IDT matrix calculation method\n"
+        "  --mat-method [0-3]      IDT matrix calculation method\n"
         "                            0=Calculate matrix from camera spec sens\n"
         "                            1=Use file metadata color matrix\n"
         "                            2=Use adobe coeffs included in libraw\n"
@@ -876,7 +876,7 @@ int AcesRender::unpack( const char *pathToRaw )
 //	inputs:
 //      const char *     : camera spectral sensitivity path
 //                         (either in the environment variable of
-//                          "AMPAS_CAMERA_SENSITIVITIES_PATH"
+//                          "${RAWTOACES_DATA_PATH}/camera"
 //                          such as  "/usr/local/include/rawtoaces/data/camera"
 //                          or specified by users)
 //      libraw_iparams_t : main parameters read from RAW
@@ -916,8 +916,9 @@ int AcesRender::fetchCameraSenPath( const libraw_iparams_t &P )
 //
 //	inputs:
 //      const char *  : type of light source ("unknown" if not specified)
-//                      (in the environment variable of "AMPAS_ILLUMINANT_PATH"
-//                       such as "/usr/local/include/rawtoaces/data/Illuminant")
+//                      (in the environment variable of
+//                       "${RAWTOACES_DATA_PATH}/illuminant" such as
+//                       "/usr/local/include/rawtoaces/data/illuminant")
 //
 //	outputs:
 //		int : "1" means loading/injecting light source datasets successfully,