[pango/pango1-dwrite: 1/9] build: Check for DirectWrite support

[Chun-wei Fan <fanchunwei src gnome org>]

commit ce907f408913b78e871d9bc31c327cabe0aba9d7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Jul 6 16:58:41 2022 +0800

    build: Check for DirectWrite support
    
    ...in Cairo, as well as their presence in the Windows SDKs (which should
    always be there in the Windows SDKs).  We want to use items in DirectWrite
    to help us improve support on Windows regarding looking up for features
    (description) of a font.
    
    Since upstream Cairo gained DirectWrite support very recently, check for
    it only via pkg-config, since Cairo had Meson build support quite a bit before
    that happened.

 meson.build       | 9 +++++++++
 pango/meson.build | 1 +
 2 files changed, 10 insertions(+)
---
diff --git a/meson.build b/meson.build
index 4922453a3..4661a4902 100644
--- a/meson.build
+++ b/meson.build
@@ -46,6 +46,7 @@ osx_current = pango_binary_age - pango_interface_age + 1
 pango_osxversion = [osx_current, '@0@.@1@.0'.format(osx_current, pango_interface_age)]
 
 cc = meson.get_compiler('c')
+cpp = meson.get_compiler('cpp')
 host_system = host_machine.system()
 
 # Compiler and linker flags
@@ -390,9 +391,13 @@ endif
 
 cairo_found_type = ''
 cairo_dep = dependency('cairo', version: cairo_req_version, required: cairo_option)
+cairo_dwrite_dep = disabler() # Only for Windows
 
 if cairo_dep.found()
   cairo_found_type = cairo_dep.type_name()
+  if host_system == 'windows'
+    cairo_dwrite_dep = dependency('cairo-win32-dwrite-font', version: cairo_req_version, required: false)
+  endif
 else
   if cc.get_id() == 'msvc' and cc.has_header('cairo.h')
     cairo_dep = cc.find_library('cairo', required: cairo_option)
@@ -566,6 +571,10 @@ if cairo_dep.found()
   endif
 endif
 
+if cairo_dwrite_dep.found()
+  pango_conf.set('HAVE_CAIRO_WIN32_DIRECTWRITE', 1)
+endif
+
 # libsysprof-capture support
 libsysprof_capture_dep = dependency('sysprof-capture-4',
   required: get_option('sysprof'),
diff --git a/pango/meson.build b/pango/meson.build
index 1a4b41419..d6b2d81cd 100644
--- a/pango/meson.build
+++ b/pango/meson.build
@@ -429,6 +429,7 @@ if host_system == 'windows'
   pangowin32_deps = pango_deps + [
     libpango_dep,
     cc.find_library('gdi32'),
+    cc.find_library('dwrite'),
   ]
 
   pangowin32_rc = configure_file(