From e63dea61fd2f3ffedfd488c8b8d4caf7db83fdbf Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Wed, 9 Dec 2015 11:00:57 -0300
Subject: [PATCH] Include opacity and blend mode for each layer in JSON output

---
 src/app/document_exporter.cpp |  7 ++++++-
 src/doc/CMakeLists.txt        |  1 +
 src/doc/blend_mode.cpp        | 38 +++++++++++++++++++++++++++++++++++
 src/doc/blend_mode.h          |  4 ++++
 4 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 src/doc/blend_mode.cpp

diff --git a/src/app/document_exporter.cpp b/src/app/document_exporter.cpp
index d1544befb..2c4ee610f 100644
--- a/src/app/document_exporter.cpp
+++ b/src/app/document_exporter.cpp
@@ -729,7 +729,12 @@ void DocumentExporter::createDataFile(const Samples& samples, std::ostream& os,
           firstLayer = false;
         else
           os << ",";
-        os << "\n   { \"name\": \"" << escape_for_json(layer->name()) << "\" }";
+        os << "\n   { \"name\": \"" << escape_for_json(layer->name()) << "\"";
+        if (LayerImage* layerImg = dynamic_cast<LayerImage*>(layer)) {
+          os << ", \"opacity\": " << layerImg->opacity()
+             << ", \"blendMode\": \"" << blend_mode_to_string(layerImg->blendMode()) << "\"";
+        }
+        os << " }";
       }
     }
     os << "\n  ]";
diff --git a/src/doc/CMakeLists.txt b/src/doc/CMakeLists.txt
index 0d3bf8e2c..44e46cb87 100644
--- a/src/doc/CMakeLists.txt
+++ b/src/doc/CMakeLists.txt
@@ -13,6 +13,7 @@ add_library(doc-lib
   algorithm/shrink_bounds.cpp
   anidir.cpp
   blend_funcs.cpp
+  blend_mode.cpp
   brush.cpp
   cel.cpp
   cel_data.cpp
diff --git a/src/doc/blend_mode.cpp b/src/doc/blend_mode.cpp
new file mode 100644
index 000000000..c35f73596
--- /dev/null
+++ b/src/doc/blend_mode.cpp
@@ -0,0 +1,38 @@
+// Aseprite Document Library
+// Copyright (c) 2001-2015 David Capello
+//
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "doc/blend_mode.h"
+
+namespace doc {
+
+std::string blend_mode_to_string(BlendMode blendMode)
+{
+  switch (blendMode) {
+    case BlendMode::NORMAL: return "normal";
+    case BlendMode::MULTIPLY: return "multiply";
+    case BlendMode::SCREEN: return "screen";
+    case BlendMode::OVERLAY: return "overlay";
+    case BlendMode::DARKEN: return "darken";
+    case BlendMode::LIGHTEN: return "lighten";
+    case BlendMode::COLOR_DODGE: return "color_dodge";
+    case BlendMode::COLOR_BURN: return "color_burn";
+    case BlendMode::HARD_LIGHT: return "hard_light";
+    case BlendMode::SOFT_LIGHT: return "soft_light";
+    case BlendMode::DIFFERENCE: return "difference";
+    case BlendMode::EXCLUSION: return "exclusion";
+    case BlendMode::HSL_HUE: return "hsl_hue";
+    case BlendMode::HSL_SATURATION: return "hsl_saturation";
+    case BlendMode::HSL_COLOR: return "hsl_color";
+    case BlendMode::HSL_LUMINOSITY: return "hsl_luminosity";
+    default: return "unknown";
+  }
+}
+
+} // namespace doc
diff --git a/src/doc/blend_mode.h b/src/doc/blend_mode.h
index 497bb0c58..f26e04c56 100644
--- a/src/doc/blend_mode.h
+++ b/src/doc/blend_mode.h
@@ -8,6 +8,8 @@
 #define DOC_BLEND_MODE_H_INCLUDED
 #pragma once
 
+#include <string>
+
 namespace doc {
 
   enum class BlendMode {
@@ -38,6 +40,8 @@ namespace doc {
     HSL_LUMINOSITY  = 15
   };
 
+  std::string blend_mode_to_string(BlendMode blendMode);
+
 } // namespace doc
 
 #endif