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wayland: Enforce or override libdecor minimum window size

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libdecor plugins can change the min/max window size values internally to enforce a minimum window size, and errors and crashes can result if the window size is below the internal limit.

On versions of libdecor >= 0.1.1, the minimum width and height can be queried and the minimum required window size will be enforced. The application requested window size is still respected, however, the actual window may be slightly larger than the drawable area to accommodate the required libdecor minimum size.

On version 0.1.0 of libdecor, which lacks the function to retrieve the minimum size, the internal limits are overridden before committing a frame, so that the internal limits always match the window size as a workaround, even if the window is technically smaller than the plugin would normally allow.

(cherry picked from commit 423a82cd4b)
This commit is contained in:
Frank Praznik 2023-01-16 13:39:26 -05:00 • committed by Sam Lantinga
parent eabd88ed28
commit ea179abdb7
7 changed files with 125 additions and 23 deletions
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11
cmake/sdlchecks.cmake
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@ -734,6 +734,17 @@ macro(CheckWayland)
else()
list(APPEND EXTRA_LIBS ${PKG_LIBDECOR_LIBRARIES})
endif()
cmake_push_check_state()
list(APPEND CMAKE_REQUIRED_FLAGS ${PKG_LIBDECOR_CFLAGS})
list(APPEND CMAKE_REQUIRED_INCLUDES ${PKG_LIBDECOR_INCLUDE_DIRS})
list(APPEND CMAKE_REQUIRED_LIBRARIES ${PKG_LIBDECOR_LINK_LIBRARIES})
check_symbol_exists(libdecor_frame_get_max_content_size "libdecor.h" HAVE_LIBDECOR_FRAME_GET_MAX_CONTENT_SIZE)
check_symbol_exists(libdecor_frame_get_min_content_size "libdecor.h" HAVE_LIBDECOR_FRAME_GET_MIN_CONTENT_SIZE)
if(HAVE_LIBDECOR_FRAME_GET_MAX_CONTENT_SIZE AND HAVE_LIBDECOR_FRAME_GET_MIN_CONTENT_SIZE)
set(SDL_HAVE_LIBDECOR_GET_MIN_MAX 1)
endif()
cmake_pop_check_state()
endif()
endif()