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main: implement saveScreenshot() writing bmp/png from SDL window buffer

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When pressing `i` create a screenshot of the current InfiniTime screen
by dumping it to a timestamped png or bmp file like
`InfiniSim_2022-03-08_203421.png`.

Add a new configure option `WITH_PNG` with default `ON`. When switched
to `OFF` the screenshots will be created in `bmp` format.

Fixes: https://github.com/InfiniTimeOrg/InfiniSim/issues/5
This commit is contained in:
Reinhold Gschweicher
2022-03-02 22:05:28 +01:00
parent 819d9cbdcb
commit dfbc345511
5 changed files with 115 additions and 0 deletions
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7
CMakeLists.txt
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@@ -208,3 +208,10 @@ set(VERSION_EDIT_WARNING "// Do not edit this file, it is automatically generate
configure_file("${InfiniTime_DIR}/src/Version.h.in" "${CMAKE_CURRENT_BINARY_DIR}/Version.h")
target_include_directories(infinisim PRIVATE "${CMAKE_CURRENT_BINARY_DIR}")
option(WITH_PNG "Compile with libpng support to dump current screen as png" ON)
if(WITH_PNG)
target_compile_definitions(infinisim PRIVATE WITH_PNG)
add_subdirectory(libpng EXCLUDE_FROM_ALL)
target_link_libraries(infinisim PRIVATE png_static)
endif()