Merge pull request #247 from noahwc/exportlut

Add an exporthaldclut lighttable module

contrib/exportLUT.lua

@@ -0,0 +1,145 @@
+--[[
+    This file is part of darktable,
+    copyright (c) 2020 Noah Clarke
+
+    darktable is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    darktable is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+]]
+--[[
+Add the following line to .config/darktable/luarc to enable this lightable module: 
+  require "contrib/exportLut"
+
+Given a haldCLUT identity file this script generates haldCLUTS from all the user's
+styles and exports them to a location of their choosing.
+
+Warning: during export if a naming collision occurs the older file is automatically
+overwritten silently.
+]]
+
+local dt = require "darktable"
+local du = require "lib/dtutils"
+local df = require("lib/dtutils.file")
+local ds = require("lib/dtutils.system")
+
+local gettext = dt.gettext
+
+gettext.bindtextdomain("exportLUT",dt.configuration.config_dir.."/lua/locale/")
+
+local function _(msgid)
+    return gettext.dgettext("exportLUT", msgid)
+end
+
+du.check_min_api_version("5.0.0", "exportLUT") 
+
+-- Thanks Kevin Ertel for this bit
+local os_path_seperator = '/'
+if dt.configuration.running_os == 'windows' then os_path_seperator = '\\' end
+local mkdir_command = 'mkdir -p '
+if dt.configuration.running_os == 'windows' then mkdir_command = 'mkdir ' end
+
+local file_chooser_button = dt.new_widget("file_chooser_button"){
+    title = _("Identity_file_chooser"),
+    value = "",
+    is_directory = false
+}
+
+local export_chooser_button = dt.new_widget("file_chooser_button"){
+    title = _("Export_location_chooser"),
+    value = "",
+    is_directory = true
+}
+
+local identity_label = dt.new_widget("label"){
+  label = _("choose the identity haldclut file")
+}
+
+local output_label = dt.new_widget("label"){
+  label = _("choose the output location")
+}
+
+local warning_label = dt.new_widget("label"){
+  label = _("WARNING: files may be silently overwritten")
+}
+
+local function end_job(job)
+  job.valid = false
+end
+
+local function output_path(style_name, job)
+  local output_location = export_chooser_button.value .. os_path_seperator .. style_name .. ".png"
+  output_location = string.gsub(output_location, "|", os_path_seperator)
+  local output_dir = string.reverse(output_location)
+  output_dir = string.gsub(output_dir, ".-" .. os_path_seperator, os_path_seperator, 1)
+  output_dir = string.reverse(output_dir)
+  if(output_dir ~= "") then
+    df.mkdir(df.sanitize_filename(output_dir))
+  end
+  return output_location
+end
+
+local function export_luts()
+  local identity = dt.database.import(file_chooser_button.value)
+  if(type(identity) ~= "userdata") then
+    dt.print(_("Invalid identity lut file"))
+  else
+    local job = dt.gui.create_job(_('Exporting styles as haldCLUTs'), true, end_job)
+    
+    local size = 1
+
+    for style_num, style in ipairs(dt.styles) do
+      size = size + 1
+    end
+
+    local count = 0
+    for style_num, style in ipairs(dt.styles) do
+      
+      identity:reset()
+      dt.styles.apply(style, identity)
+      local io_lut = dt.new_format("png")
+      io_lut.bpp = 8
+
+      io_lut:write_image(identity, output_path(style.name, job))
+      count = count + 1
+      job.percent = count / size
+      dt.print(_("Exported: ") .. output_path(style.name, job))
+    end
+    dt.print(_("Done exporting haldCLUTs"))
+    job.valid = false
+    identity:reset()
+  end
+end
+
+local export_button = dt.new_widget("button"){
+  label = _("export"),
+  clicked_callback = export_luts
+}
+
+dt.register_lib(
+  _("export haldclut"),
+  _("export haldclut"),
+  true,
+  false,
+  {[dt.gui.views.lighttable] = {"DT_UI_CONTAINER_PANEL_RIGHT_CENTER", 100}},
+  dt.new_widget("box")
+  {
+    orientation = "vertical",
+    identity_label,
+    file_chooser_button,
+    output_label,
+    export_chooser_button,
+    warning_label,
+    export_button
+  },
+  nil,
+  nil
+)