libass dynamic library (#5244)

* libass dynamic library
it relies on fribidi, harfbuzz, fontconfig, libiconv

* Remove references to iconv and fontconfig

Because this port is currently Windows-only (Fribidi doesn't build on
Linux with vcpkg because of an issue with Meson), we don't want to worry
about FontConfig; DirectWrite should be enough.

* Freetype is important!

* Remove unnecessary fontconfig -- for real

* Remove unnecessary comment

3 files changed, 64 insertions, 5 deletions

diff --git a/ports/libass/CMakeLists.txt b/ports/libass/CMakeLists.txt
index 12e32f902..5570f3440 100644
--- a/ports/libass/CMakeLists.txt
+++ b/ports/libass/CMakeLists.txt
@@ -9,6 +9,9 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 #    macOS - CONFIG_CORETEXT

 #    linux - CONFIG_FONTCONFIG

 add_compile_definitions(CONFIG_DIRECTWRITE)

+add_compile_definitions(CONFIG_FREETYPE)

+add_compile_definitions(CONFIG_FRIBIDI)

+add_compile_definitions(CONFIG_HARFBUZZ)

 

 file (GLOB_RECURSE SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/libass/*.c)

 

@@ -21,13 +24,23 @@ find_path(FRIBIDI_INCLUDE_DIR
           NAMES fribidi.h

           PATH_SUFFIXES fribidi)

 

+find_path(HARFBUZZ_INCLUDE_DIR

+          NAMES hb.h

+          PATH_SUFFIXES harfbuzz)

+

 find_library(FRIBIDI_LIBRARY NAMES fribidi)

+find_library(HARFBUZZ_LIBRARY NAMES harfbuzz)

 

-add_library(ass STATIC ${SOURCES})

+add_library(ass ${SOURCES} ${CMAKE_CURRENT_SOURCE_DIR}/libass.def)

 

-target_include_directories(ass PRIVATE ${FRIBIDI_INCLUDE_DIR})

+target_include_directories(ass PRIVATE 

+  ${FRIBIDI_INCLUDE_DIR} 

+  ${HARFBUZZ_INCLUDE_DIR})

 

-target_link_libraries(ass PRIVATE Freetype::Freetype)

+target_link_libraries(ass PRIVATE 

+  Freetype::Freetype 

+  ${FRIBIDI_LIBRARY} 

+  ${HARFBUZZ_LIBRARY})

 

 install(TARGETS ass

   RUNTIME DESTINATION bin

diff --git a/ports/libass/libass.def b/ports/libass/libass.def
new file mode 100644
index 000000000..58bfad3d6
--- /dev/null
+++ b/ports/libass/libass.def
@@ -0,0 +1,46 @@
+EXPORTS

+ass_library_init

+ass_library_done

+ass_library_version

+ass_set_fonts_dir

+ass_set_extract_fonts

+ass_set_style_overrides

+ass_renderer_init

+ass_renderer_done

+ass_set_frame_size

+ass_set_storage_size

+ass_set_margins

+ass_set_use_margins

+ass_set_aspect_ratio

+ass_set_font_scale

+ass_set_hinting

+ass_set_line_spacing

+ass_get_available_font_providers

+ass_set_fonts

+ass_render_frame

+ass_new_track

+ass_free_track

+ass_alloc_style

+ass_alloc_event

+ass_free_style

+ass_free_event

+ass_process_data

+ass_process_codec_private

+ass_process_chunk

+ass_read_file

+ass_read_memory

+ass_read_styles

+ass_add_font

+ass_clear_fonts

+ass_step_sub

+ass_process_force_style

+ass_set_message_cb

+ass_fonts_update

+ass_set_cache_limits

+ass_flush_events

+ass_set_shaper

+ass_set_line_position

+ass_set_pixel_aspect

+ass_set_selective_style_override_enabled

+ass_set_selective_style_override

+ass_set_check_readorder

diff --git a/ports/libass/portfile.cmake b/ports/libass/portfile.cmake
index 64d49c985..040cadc66 100644
--- a/ports/libass/portfile.cmake
+++ b/ports/libass/portfile.cmake
@@ -1,8 +1,6 @@
 
 include(vcpkg_common_functions)
 
-vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
-
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO libass/libass
@@ -14,6 +12,8 @@ vcpkg_from_github(
 
 file(COPY ${CMAKE_CURRENT_LIST_DIR}/config.h.in DESTINATION ${SOURCE_PATH})
 
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/libass.def DESTINATION ${SOURCE_PATH})
+
 # Handle copyright
 file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/libass RENAME copyright)