GUI: experimental FreeType font renderer

disabled by default until I feel happy

CMakeLists.txt

@@ -95,8 +95,10 @@ option(WITH_RENDER_SDL "Whether to build with the SDL_Renderer render backend."
 option(WITH_RENDER_OPENGL "Whether to build with the OpenGL render backend." ${WITH_RENDER_OPENGL_DEFAULT})
 option(WITH_RENDER_DX11 "Whether to build with the DirectX 11 render backend." ${WITH_RENDER_DX11_DEFAULT})
 option(USE_GLES "Use OpenGL ES for the OpenGL render backend." ${USE_GLES_DEFAULT})
+option(USE_FREETYPE "Use FreeType for font rendering." OFF)
 option(SYSTEM_FFTW "Use a system-installed version of FFTW instead of the vendored one" OFF)
 option(SYSTEM_FMT "Use a system-installed version of fmt instead of the vendored one" OFF)
+option(SYSTEM_FREETYPE "Use a system-installed version of FreeType instead of the vendored one" OFF)
 option(SYSTEM_LIBSNDFILE "Use a system-installed version of libsndfile instead of the vendored one" OFF)
 option(SYSTEM_PORTAUDIO "Use a system-installed version of PortAudio instead of the vendored one" OFF)
 option(SYSTEM_RTMIDI "Use a system-installed version of RtMidi instead of the vendored one" OFF)
@@ -192,6 +194,34 @@ else()
   message(STATUS "Using vendored fmt")
 endif()
 
+if (BUILD_GUI AND USE_FREETYPE)
+  # TODO: FIX FIX FIX FIX FIX
+  if (SYSTEM_FREETYPE)
+    if (PKG_CONFIG_FOUND)
+      pkg_check_modules(FREETYPE freetype>=2.0.0)
+      if (FREETYPE_FOUND)
+        list(APPEND DEPENDENCIES_INCLUDE_DIRS ${FMT_INCLUDE_DIRS})
+        list(APPEND DEPENDENCIES_COMPILE_OPTIONS ${FMT_CFLAGS_OTHER})
+        list(APPEND DEPENDENCIES_LIBRARIES ${FMT_LIBRARIES})
+        list(APPEND DEPENDENCIES_LIBRARY_DIRS ${FMT_LIBRARY_DIRS})
+        list(APPEND DEPENDENCIES_LINK_OPTIONS ${FMT_LDFLAGS_OTHER})
+        list(APPEND DEPENDENCIES_LEGACY_LDFLAGS ${FMT_LDFLAGS})
+      endif()
+    endif()
+    if (NOT FREETYPE_FOUND)
+      find_package(freetype REQUIRED)
+      list(APPEND DEPENDENCIES_LIBRARIES freetype::freetype)
+    endif()
+    message(STATUS "Using system-installed FreeType")
+  else()
+    add_subdirectory(extern/freetype EXCLUDE_FROM_ALL)
+    list(APPEND DEPENDENCIES_INCLUDE_DIRS extern/freetype/include)
+    list(APPEND DEPENDENCIES_LIBRARIES freetype)
+    message(STATUS "Using vendored FreeType")
+  endif()
+  list(APPEND DEPENDENCIES_DEFINES HAVE_FREETYPE)
+endif()
+
 if (USE_SNDFILE)
   list(APPEND DEPENDENCIES_DEFINES HAVE_SNDFILE)
   if (SYSTEM_LIBSNDFILE)
@@ -782,6 +812,10 @@ if (WIN32 AND NOT SUPPORT_XP)
   list(APPEND GUI_SOURCES extern/nfd-modified/src/nfd_win.cpp)
 endif()
 
+if (USE_FREETYPE)
+  list(APPEND GUI_SOURCES extern/imgui_patched/misc/freetype/imgui_freetype.cpp)
+endif()
+
 if (APPLE)
   list(APPEND GUI_SOURCES extern/nfd-modified/src/nfd_common.cpp)
   list(APPEND GUI_SOURCES src/gui/macstuff.m)

extern/freetype/.clang-format

@@ -0,0 +1,16 @@
+BasedOnStyle: Chromium
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+AlignConsecutiveMacros: true
+AlignEscapedNewlines: true
+# AlignOperands: Align
+AlignTrailingComments: true
+AlwaysBreakAfterReturnType: AllDefinitions
+BreakBeforeBraces: Allman
+ColumnLimit: 80
+DerivePointerAlignment: false
+IndentCaseLabels: false
+PointerAlignment: Left
+SpaceBeforeParens: ControlStatements
+SpacesInParentheses: true