Allow specification of an output directory.

[[Imported from SVN: r6900]]

cmake/modules/FindInkscape.cmake

@@ -4,5 +4,33 @@
 #
 # INSCAPE: Path to inkscape to generate .png's form .svg's
 #
+# Provides the following functions:
+#
+# inkscape_generate_png_from_svg([OUTPUT_DIR <output_dir>] <pngfile1.png> [<pngfile2.png> ....])
+#
+# Generates pngfile1, ... from svg input files pngfile1.svg, ....
+# The output directory can be specified with the option OUTPUT_DIR. If it is omitted
+# the files will be generated in CMAKE_CURRENT_BINARY_DIR.
 
 find_program(INKSCAPE inkscape DOC "Path to inkscape to generate .png's form .svg'")
+
+function(inkscape_generate_png_from_svg)
+  if(NOT INKSCAPE)
+    return()
+  endif(NOT INKSCAPE)
+  include(CMakeParseArguments)
+  cmake_parse_arguments(INKSCAPE "" "OUTPUT_DIR" "" ${ARGN})
+  if(NOT INKSCAPE_OUTPUT_DIR)
+    set(INKSCAPE_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif(NOT INKSCAPE_OUTPUT_DIR)
+  foreach(pic ${INKSCAPE_UNPARSED_ARGUMENTS})
+    string(REGEX REPLACE "\\.[^.]+" ".svg" input ${pic})
+    message("pic=${pic} input=${input}")
+    add_custom_command(OUTPUT ${pic} COMMAND ${INKSCAPE} -e ${pic} ${CMAKE_CURRENT_SOURCE_DIR}/${input}
+      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${input} COMMENT "Generating ${pic}"
+      WORKING_DIRECTORY  ${INKSCAPE_OUTPUT_DIR})
+    message("    add_custom_command(OUTPUT ${pic} COMMAND ${INKSCAPE} -e ${pic} ${CMAKE_CURRENT_SOURCE_DIR}/${input}
+      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${input} COMMENT \"Generating ${pic}\"
+      WORKING_DIRECTORY  ${INKSCAPE_OUTPUT_DIR})")
+  endforeach(pic)
+endfunction(inkscape_generate_png_from_svg)