[Buildroot] [PATCH 6/8] package/sdl3_ttf: build plutosvg support when available

Colour emoji fonts store their glyphs as SVG, which SDL3_ttf renders
through plutosvg. Without it those glyphs are skipped and the rest of
the font still renders.

plutosvg is packaged in the swift-linux ports tree rather than in
Buildroot, so BR2_PACKAGE_PLUTOSVG is undefined on a plain Buildroot and
the branch selects SDLTTF_PLUTOSVG=OFF - the behaviour before this
commit. Not for upstream until plutosvg and plutovg are packaged there.

Signed-off-by: Alsey Coleman Miller <[email protected]>
---
 package/sdl3_ttf/sdl3_ttf.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/package/sdl3_ttf/sdl3_ttf.mk b/package/sdl3_ttf/sdl3_ttf.mk
index 130e07746e..660661a5b7 100644
--- a/package/sdl3_ttf/sdl3_ttf.mk
+++ b/package/sdl3_ttf/sdl3_ttf.mk
@@ -26,4 +26,14 @@ else
 SDL3_TTF_CONF_OPTS += -DSDLTTF_HARFBUZZ=OFF
 endif
 
+# plutosvg renders the SVG glyphs in a colour emoji font, through the
+# FreeType OpenType-SVG hooks. Without it those glyphs are skipped and the
+# rest of the font still renders.
+ifeq ($(BR2_PACKAGE_PLUTOSVG),y)
+SDL3_TTF_DEPENDENCIES += plutosvg
+SDL3_TTF_CONF_OPTS += -DSDLTTF_PLUTOSVG=ON
+else
+SDL3_TTF_CONF_OPTS += -DSDLTTF_PLUTOSVG=OFF
+endif
+
 $(eval $(cmake-package))
-- 
2.47.3

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