sim: embedd background bmp and load from memory
Loading the file from disk introduces a slight dependency on the working directory for the simulator. Prevent that by loading the bmp from memory. Use a python script to convert the backround bmp image to a C header file. Include this header in `main.cpp` and load the bmp from memory.main
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message(STATUS "folder img: converting background.bmp to C file to include in binary")
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if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
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# FindPython3 module introduces with CMake 3.12
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# https://cmake.org/cmake/help/latest/module/FindPython3.html
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find_package(Python3 REQUIRED)
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else()
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set(Python3_EXECUTABLE "python")
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endif()
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set(bmp_file ${CMAKE_CURRENT_SOURCE_DIR}/sim_background.bmp)
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set(out_file ${CMAKE_CURRENT_BINARY_DIR}/sim_background.h)
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# call python script to convert image to c file
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add_custom_command(
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OUTPUT ${out_file}
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COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/convert_bmp_to_header.py
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${bmp_file}
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--var-name "SIM_BACKGROUND"
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--output ${out_file}
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DEPENDS ${bmp_file}
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
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)
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# add target that can be added as dependency to infinisim target to trigger creation of C-file
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add_custom_target(infinisim_img_background
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DEPENDS ${out_file}
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)
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#!/usr/bin/env python3
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import argparse
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parser = argparse.ArgumentParser()
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parser.add_argument("bmp",
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help="Path to bmp to convert to C header file")
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parser.add_argument("--var-name",
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help="name of the variable to make the bmp data available",
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default="IMAGE_DATA")
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parser.add_argument("-o", "--output",
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help="Path where to create C header file",
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required=True)
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args = parser.parse_args()
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with open(args.output, "w", encoding="utf-8") as f:
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# conversion script based on:
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# https://stackoverflow.com/questions/18422123/sdl-embed-image-inside-program-executable
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f.write("static const unsigned char {:s}[] = {{{:s}}};".format(
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args.var_name,
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",".join(str(b) for b in open(args.bmp, "rb").read())))
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