[pango/pango1-dwrite: 22/24] meson.build: Check for GDI and DirectWrite support in HarfBuzz

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

commit 3ab3e076665d0722d6f12938f3bddf263322539b
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Aug 16 16:42:39 2022 +0800

    meson.build: Check for GDI and DirectWrite support in HarfBuzz
    
    These support are not enabled by default when building HarfBuzz, but if one or
    both are enabled, we can simplify the codepath to create the needed hb_face_t.
    
    This was not added previously as the needed HarfBuzz GDI API was not available
    at the time the code was written and we are only integrating DirectWrite now.

 meson.build | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/meson.build b/meson.build
index f233079ae..840d37f6f 100644
--- a/meson.build
+++ b/meson.build
@@ -278,6 +278,24 @@ harfbuzz_dep = dependency('harfbuzz',
                           fallback: ['harfbuzz', 'libharfbuzz_dep'],
                           default_options: ['coretext=enabled'])
 
+if host_system == 'windows'
+  if cpp.has_header_symbol(
+      'hb-directwrite.h',
+      'hb_directwrite_face_create',
+      dependencies: harfbuzz_dep,
+      prefix: '#include <dwrite.h>',
+    )
+    pango_conf.set('HAVE_HARFBUZZ_DIRECT_WRITE', 1)
+  endif
+  if cc.has_header_symbol(
+      'hb-gdi.h',
+      'hb_gdi_face_create',
+      dependencies: harfbuzz_dep,
+    )
+    pango_conf.set('HAVE_HARFBUZZ_GDI', 1)
+  endif
+endif
+
 pango_deps += harfbuzz_dep
 
 # If option is 'auto' or 'enabled' it is not required to find fontconfig on the