#
# MalikaniaBuildAssets.cmake -- CMake build system for malikania
#
# Copyright (c) 2013-2016 Malikania Authors
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#

#
# malikania_build_assets
# ----------------------
#
# malikania_build_assets(inputs outputs)
#
# Create binary data as C++ arrays for inclusion in source code. Static assets
# increases the executable size so use this when really needed.
#
# The macro iterates over the input data which can be any files and generates
# outputs file in the form CMAKE_CURRENT_BINARY_DIR/assets/basename.cpp.
#
# The macro removes the extension from the filename and create a static array
# with that name, thus you need to specify a filename that is compatible with
# C++ identifiers!
#
# Correct:
#   - myfile.png
#   - startup_logo.png
#
# Incorrect:
#   - useful-code.ogg
#   - archive.tar.xz
#
# Note: this macro requires the target mlk-bcc (tools/bcc directory).
#

macro(malikania_build_assets inputs outputs)
    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/assets)

    foreach (in ${inputs})
        get_filename_component(basename ${in} NAME_WE)
        set(out ${CMAKE_CURRENT_BINARY_DIR}/assets/${basename}.cpp)
        add_custom_command(
            OUTPUT ${out}
            COMMENT "Generating binary data from ${in}"
            DEPENDS ${in}
            COMMAND
                $<TARGET_FILE:mlk-bcc> ${basename} ${in} ${out}
        )
        list(APPEND ${outputs} ${out})
    endforeach ()
endmacro()