UI Icons: store icons in git as uncompressed pixmaps (D196)

this allows for updating icons without committing a new PNG each time
(which is inefficient with git). The data files are converted into a
PNG at builds time and used just as they were before.

GNUmakefile

@@ -328,8 +328,8 @@ tbz:
 	@echo "blender_archive.tar.bz2 written"
 
 icons:
-	"$(BLENDER_DIR)/release/datafiles/blender_icons.sh"
-	"$(BLENDER_DIR)/release/datafiles/prvicons.sh"
+	"$(BLENDER_DIR)/release/datafiles/blender_icons_update.py"
+	"$(BLENDER_DIR)/release/datafiles/prvicons_update.py"
 
 
 # -----------------------------------------------------------------------------

SConstruct

@@ -653,6 +653,27 @@ def data_to_c_simple(FILE_FROM):
 	data_to_c(FILE_FROM, FILE_TO, VAR_NAME)
 
 
+def data_to_c_simple_icon(PATH_FROM):
+
+    # first handle import
+    import sys
+    path = "source/blender/datatoc"
+    if path not in sys.path:
+        sys.path.append(path)
+
+    # convert the pixmaps to a png
+    import datatoc_icon
+
+    filename_only = os.path.basename(PATH_FROM)
+    FILE_TO_PNG = os.path.join(env['DATA_SOURCES'], filename_only + ".png")
+    FILE_TO = FILE_TO_PNG + ".c"
+    argv = [PATH_FROM, FILE_TO_PNG]
+    datatoc_icon.main_ex(argv)
+
+    # then the png to a c file
+    data_to_c_simple(FILE_TO_PNG)
+
+
 if B.targets != ['cudakernels']:
     data_to_c("source/blender/compositor/operations/COM_OpenCLKernels.cl",
               B.root_build_dir + "data_headers/COM_OpenCLKernels.cl.h",
@@ -680,8 +701,12 @@ if B.targets != ['cudakernels']:
     data_to_c_simple("release/datafiles/bmonofont.ttf")
 
     data_to_c_simple("release/datafiles/splash.png")
-    data_to_c_simple("release/datafiles/blender_icons16.png")
-    data_to_c_simple("release/datafiles/blender_icons32.png")
+
+    # data_to_c_simple("release/datafiles/blender_icons16.png")
+    # data_to_c_simple("release/datafiles/blender_icons32.png")
+    data_to_c_simple_icon("release/datafiles/blender_icons16")
+    data_to_c_simple_icon("release/datafiles/blender_icons32")
+
     data_to_c_simple("release/datafiles/prvicons.png")
 
     data_to_c_simple("release/datafiles/brushicons/add.png")

build_files/cmake/macros.cmake

@@ -831,6 +831,46 @@ macro(data_to_c_simple
 	unset(_file_to_path)
 endmacro()
 
+# macro for converting pixmap directory to a png and then a c file
+macro(data_to_c_simple_icons
+      path_from
+      list_to_add
+      )
+
+	# Conversion steps
+	#  path_from  ->  _file_from  ->  _file_to
+	#  foo/*.dat  ->  foo.png     ->  foo.png.c
+
+	get_filename_component(_path_from_abs ${path_from} ABSOLUTE)
+	# remove ../'s
+	get_filename_component(_file_from ${CMAKE_CURRENT_BINARY_DIR}/${path_from}.png   REALPATH)
+	get_filename_component(_file_to   ${CMAKE_CURRENT_BINARY_DIR}/${path_from}.png.c REALPATH)
+
+	list(APPEND ${list_to_add} ${_file_to})
+
+	get_filename_component(_file_to_path ${_file_to} PATH)
+
+	# ideally we wouldn't glob, but storing all names for all pixmaps is a bit heavy
+	file(GLOB _icon_files "${path_from}/*.dat")
+
+	add_custom_command(
+		OUTPUT  ${_file_from} ${_file_to}
+		COMMAND ${CMAKE_COMMAND} -E make_directory ${_file_to_path}
+		#COMMAND python3 ${CMAKE_SOURCE_DIR}/source/blender/datatoc/datatoc_icon.py ${_path_from_abs} ${_file_from}
+		COMMAND ${CMAKE_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/datatoc_icon ${_path_from_abs} ${_file_from}
+		COMMAND ${CMAKE_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/datatoc ${_file_from} ${_file_to}
+		DEPENDS ${_icon_files} datatoc)
+
+	set_source_files_properties(${_file_from} ${_file_to} PROPERTIES GENERATED TRUE)
+
+	unset(_path_from_abs)
+	unset(_file_from)
+	unset(_file_to)
+	unset(_file_to_path)
+	unset(_icon_files)
+
+endmacro()
+
 # XXX Not used for now...
 macro(svg_to_png
       file_from