SAIL: Added possibility to specify not just individual codecs but cod…

…ec groups by their priorities in CMake configuration routine

CMakeLists.txt

@@ -78,11 +78,14 @@ option(SAIL_BUILD_EXAMPLES "Build examples." ON)
 option(SAIL_BUILD_TESTS "Build tests." ON)
 option(SAIL_DEV "Enable developer mode. Be more strict when compiling source code, for example." OFF)
 set(SAIL_ENABLE_CODECS "" CACHE STRING "Forcefully enable the codecs specified in this ';'-separated list. \
-If an enabled codec fails to find its dependencies, the configuration process fails.")
-set(SAIL_DISABLE_CODECS "" CACHE STRING "Disable the codecs specified in this ';'-separated list.")
+If an enabled codec fails to find its dependencies, the configuration process fails. \
+One can also specify not just individual codecs but codec groups by their priority like that: highest-priority;xbm.")
+set(SAIL_DISABLE_CODECS "" CACHE STRING "Disable the codecs specified in this ';'-separated list. \
+One can also specify not just individual codecs but codec groups by their priority like that: highest-priority;xbm.")
 option(SAIL_INSTALL_PDB "Install PDB files along with libraries." ON)
 set(SAIL_ONLY_CODECS "" CACHE STRING "Forcefully enable only the codecs specified in this ';'-separated list and disable the rest. \
-If an enabled codec fails to find its dependencies, the configuration process fails.")
+If an enabled codec fails to find its dependencies, the configuration process fails. \
+One can also specify not just individual codecs but codec groups by their priority like that: highest-priority;xbm.")
 option(BUILD_SHARED_LIBS "Build shared libs. When disabled, sets SAIL_COMBINE_CODECS to ON automatically." ON)
 cmake_dependent_option(SAIL_COMBINE_CODECS "Combine all codecs into a single library. When disabled, all codecs are implemented as \
 dynamically loaded plugins." OFF "BUILD_SHARED_LIBS" ON)

src/sail-codecs/CMakeLists.txt

@@ -4,14 +4,49 @@ add_subdirectory(common/bmp)
 
 # List of codecs
 #
-set(CODECS avif bmp gif ico jpeg jpeg2000 jpegxl pcx png psd qoi svg tga tiff wal webp xbm)
-
+set(HIGHEST_PRIORITY_CODECS gif jpeg png tiff)
+set(HIGH_PRIORITY_CODECS    bmp svg)
+set(MEDIUM_PRIORITY_CODECS  avif jpeg2000 jpegxl webp)
+set(LOW_PRIORITY_CODECS     ico pcx psd qoi tga)
+set(LOWEST_PRIORITY_CODECS  wal xbm)
+
+set(CODECS ${HIGHEST_PRIORITY_CODECS}
+           ${HIGH_PRIORITY_CODECS}
+           ${MEDIUM_PRIORITY_CODECS}
+           ${LOW_PRIORITY_CODECS}
+           ${LOWEST_PRIORITY_CODECS})
 list(SORT CODECS)
 
-# Filter out codecs
+# Expand codecs priorities to actual codecs.
 #
-set(FORCED_CODECS "")
+macro(sail_expand_priorities)
+    set(TEMP_LIST)
+
+    foreach (codec IN LISTS ${ARGV0})
+        if (codec STREQUAL "highest-priority")
+            list(APPEND TEMP_LIST ${HIGHEST_PRIORITY_CODECS})
+        elseif (codec STREQUAL "high-priority")
+            list(APPEND TEMP_LIST ${HIGH_PRIORITY_CODECS})
+        elseif (codec STREQUAL "medium-priority")
+            list(APPEND TEMP_LIST ${MEDIUM_PRIORITY_CODECS})
+        elseif (codec STREQUAL "low-priority")
+            list(APPEND TEMP_LIST ${LOW_PRIORITY_CODECS})
+        elseif (codec STREQUAL "lowest-priority")
+            list(APPEND TEMP_LIST ${LOWEST_PRIORITY_CODECS})
+        else()
+            list(APPEND TEMP_LIST ${codec})
+        endif()
+    endforeach()
 
+    set(${ARGV0} ${TEMP_LIST})
+endmacro()
+
+sail_expand_priorities(SAIL_ONLY_CODECS)
+sail_expand_priorities(SAIL_ENABLE_CODECS)
+sail_expand_priorities(SAIL_DISABLE_CODECS)
+
+# Filter out codecs
+#
 if (SAIL_ONLY_CODECS)
     set(ENABLED_CODECS "")