[shotwell] Create commandline utility to apply transformations

[Jens Georg <jensgeorg src gnome org>]

commit 0621137d56b664ac23438c2114bb6d20a3cbe3b7
Author: Jens Georg <mail jensge org>
Date:   Tue Mar 14 23:09:53 2017 +0100

    Create commandline utility to apply transformations
    
    Signed-off-by: Jens Georg <mail jensge org>

 Makefile.am                  |    1 +
 pipeline.am                  |   41 +++++++++++++++++++
 shotwell.am                  |   10 +++--
 src/ColorTransformation.vala |    2 +-
 src/graphics-processor.vala  |   88 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 137 insertions(+), 5 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 51f11ba..edb2dea 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -128,6 +128,7 @@ dist_noinst_DATA = $(NULL)
 MOSTLYCLEANFILES = $(NULL)
 
 include $(top_srcdir)/common.am
+include $(top_srcdir)/pipeline.am
 include $(top_srcdir)/shotwell.am
 include $(top_srcdir)/thumbnailer.am
 
diff --git a/pipeline.am b/pipeline.am
new file mode 100644
index 0000000..559cecf
--- /dev/null
+++ b/pipeline.am
@@ -0,0 +1,41 @@
+src/shotwell-graphics-processor.vapi src/shotwell-graphics-processor.h: \
+       src_libgraphics_processor_la_vala.stamp
+
+noinst_LTLIBRARIES += \
+       src/libgraphics-processor.la
+
+src_libgraphics_processor_la_SOURCES = \
+       src/ColorTransformation.vala \
+       src/util/KeyValueMap.vala
+
+src_libgraphics_processor_la_VALAFLAGS = \
+       $(COMMON_VALAFLAGS) \
+       --pkg gio-2.0 \
+       --pkg gdk-3.0 \
+       --pkg gee-0.8 \
+       --pkg gdk-pixbuf-2.0 \
+       --vapi=src/shotwell-graphics-processor.vapi \
+       --header=src/shotwell-graphics-processor.h
+
+src_libgraphics_processor_la_CFLAGS = $(SHOTWELL_CFLAGS) $(COMMON_CFLAGS)
+
+
+noinst_PROGRAMS = \
+       src/shotwell-graphics-processor
+
+src_shotwell_graphics_processor_SOURCES = \
+       src/graphics-processor.vala \
+       src/shotwell-graphics-processor.vapi
+
+src_shotwell_graphics_processor_VALAFLAGS = \
+       $(COMMON_VALAFLAGS) \
+       --pkg gio-2.0 \
+       --pkg gdk-3.0 \
+       --pkg gee-0.8 \
+       --pkg gdk-pixbuf-2.0
+
+src_shotwell_graphics_processor_CFLAGS = $(SHOTWELL_CFLAGS) $(COMMON_CFLAGS)
+
+src_shotwell_graphics_processor_LDADD = \
+       src/libgraphics-processor.la \
+       $(SHOTWELL_LIBS)
diff --git a/shotwell.am b/shotwell.am
index bb2c53b..91b6d35 100644
--- a/shotwell.am
+++ b/shotwell.am
@@ -4,12 +4,15 @@ shotwell_CFLAGS = \
        $(UNITY_CFLAGS) \
        $(COMMON_CFLAGS) \
        -I$(top_builddir)/plugins \
-       -I$(abs_top_srcdir)/plugins
+       -I$(abs_top_srcdir)/plugins \
+       -I$(abs_top_srcdir)/src
 
 shotwell_LDADD = \
        src/plugins/libplugin.la \
+       src/libgraphics-processor.la \
        $(SHOTWELL_LIBS) \
        $(UNITY_LIBS)
+
 shotwell_VALAFLAGS = $(COMMON_VALAFLAGS) \
        --pkg gio-2.0 --pkg gtk+-3.0 --pkg gee-0.8 \
        --pkg gio-unix-2.0 --pkg sqlite3 --pkg gmodule-2.0 \
@@ -44,7 +47,6 @@ shotwell_SOURCES = \
        src/util/misc.vala \
        src/util/string.vala \
        src/util/system.vala \
-       src/util/KeyValueMap.vala \
        src/util/ui.vala \
        src/threads/Threads.vala \
        src/threads/Workers.vala \
@@ -171,7 +173,6 @@ shotwell_SOURCES = \
        src/Dialogs.vala \
        src/Resources.vala \
        src/Debug.vala \
-       src/ColorTransformation.vala \
        src/Properties.vala \
        src/CustomComponents.vala \
        src/Event.vala \
@@ -228,4 +229,5 @@ shotwell_SOURCES = \
        src/.unitize/_FoldersInternals.vala \
        src/.unitize/_Library_unitize_entry.vala \
        src/.unitize/_Direct_unitize_entry.vala \
-       plugins/shotwell-plugin-dev-1.0.vapi
+       plugins/shotwell-plugin-dev-1.0.vapi \
+       src/shotwell-graphics-processor.vapi
diff --git a/src/ColorTransformation.vala b/src/ColorTransformation.vala
index 435d3f4..5fab75c 100644
--- a/src/ColorTransformation.vala
+++ b/src/ColorTransformation.vala
@@ -955,7 +955,7 @@ public class PixelTransformer {
     }
 }
 
-class RGBHistogram {
+public class RGBHistogram {
     private const uchar MARKED_BACKGROUND = 30;
     private const uchar MARKED_FOREGROUND = 210;
     private const uchar UNMARKED_BACKGROUND = 120;
diff --git a/src/graphics-processor.vala b/src/graphics-processor.vala
new file mode 100644
index 0000000..28968a7
--- /dev/null
+++ b/src/graphics-processor.vala
@@ -0,0 +1,88 @@
+static string input_file;
+static string output_file;
+static string pipeline;
+static bool auto_enhance;
+
+const GLib.OptionEntry[] options = {
+    { "input", 'i', 0, GLib.OptionArg.FILENAME, ref input_file, "FILE to process", "FILE" },
+    { "output", 'o', 0, GLib.OptionArg.FILENAME, ref output_file, "destination FILE", "FILE" },
+    { "pipeline", 'p', 0, GLib.OptionArg.FILENAME, ref pipeline, "graphics PIPELINE to run", "PIPELINE" },
+    { "auto-enance", 'a', 0, GLib.OptionArg.NONE, ref auto_enhance, "run auto-enhance on input file", null },
+    { null, 0, 0, GLib.OptionArg.NONE, null, null, null }
+};
+
+Gee.HashMap<string, KeyValueMap>? marshall_all_transformations(string filename) {
+    try {
+        var keyfile = new KeyFile();
+        keyfile.load_from_file(filename, KeyFileFlags.NONE);
+        var map = new Gee.HashMap<string, KeyValueMap>();
+
+        var objects = keyfile.get_groups();
+        foreach (var object in objects) {
+            var keys = keyfile.get_keys(object);
+            if (keys == null || keys.length == 0) {
+                continue;
+            }
+
+            var key_map = new KeyValueMap(object);
+            foreach (var key in keys) {
+                key_map.set_string(key, keyfile.get_string(object, key));
+            }
+            map.set(object, key_map);
+        }
+
+        return map;
+    } catch (Error err) {
+        error("%s", err.message);
+    }
+}
+
+int main(string[] args)
+{
+    var ctx = new OptionContext("- Apply shotwell transformations on commandline");
+    ctx.set_help_enabled(true);
+    ctx.set_ignore_unknown_options(true);
+    ctx.add_main_entries(options, null);
+
+    try {
+        ctx.parse(ref args);
+    } catch (Error error) {
+        print(ctx.get_help(true, null));
+
+        return 1;
+    }
+
+    Gdk.Pixbuf? src = null;
+    try {
+        src = new Gdk.Pixbuf.from_file(input_file);
+    } catch (Error err) {
+        error ("%s", err.message);
+    }
+
+    var output = src.copy();
+
+    var transformations = marshall_all_transformations(pipeline);
+
+    var adjustments = new PixelTransformationBundle();
+    var map = transformations.get("adjustments");
+    if (map == null) {
+        adjustments.set_to_identity();
+    } else {
+        adjustments.load(map);
+    }
+
+    var transformer = adjustments.generate_transformer();
+    var timer = new Timer();
+    transformer.transform_to_other_pixbuf(src, output, null);
+    var elapsed = timer.elapsed();
+
+    print("Transformation took %f\n", elapsed);
+
+    try {
+        output.save(output_file, "jpeg", "quality", "100", null);
+    } catch (Error err) {
+        error("%s", err.message);
+    }
+
+    return 0;
+}