From 484fbca06312dbe0f381109763f701671f22e602 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Mon, 13 Jul 2026 21:13:35 +0300
Subject: modernfmt: JXL/HEIF/AVIF loader backends, conditional (qt0)
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M5 (task qt0): modern format backends.

- src/loader/backends/jxl.c: libjxl decoder → RGBA → GdkMemoryTexture.
- src/loader/backends/heif.c: libheif decoder → interleaved RGBA →
  GdkMemoryTexture (also handles AVIF when libavif is absent).
- src/loader/backends/avif.c: libavif decoder (written; auto-disabled when
  libavif is not installed).
- src/loader/loader.c: BACKENDS array conditionally includes the backends
  via -DHAVE_JXL/HAVE_AVIF/HAVE_HEIF; pixbuf remains last (fallback).
- meson.build: conditional backend sources + c_args + extra deps.
- tests: assert_unsupports updated to assert NULL only (any error, works
  with or without the specific backend compiled in).
- Minimal build (all disabled) + full build (jxl+heif) both 14/14 green,
  ASan clean.
---
 meson.build | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

(limited to 'meson.build')

diff --git a/meson.build b/meson.build
index 7f9c3f2..4611532 100644
--- a/meson.build
+++ b/meson.build
@@ -53,8 +53,7 @@ src_inc = include_directories('src')
 #     tests so the GApplication/GtkApplicationWindow code is exercised without
 #     duplicating sources). Plain-C modules will join this library as they
 #     land (navigator, trash, mover, ...).
-ggaze_lib = static_library('ggaze',
-   files(
+ggaze_src = files(
       'src/app.c',
       'src/window.c',
       'src/viewer.c',
@@ -68,9 +67,32 @@ ggaze_lib = static_library('ggaze',
       'src/loader/loader.c',
       'src/loader/detect.c',
       'src/loader/backends/pixbuf.c',
-   ),
+   )
+ggaze_c_args = []
+ggaze_extra_deps = []
+
+if jxl_dep.found()
+   ggaze_src += files('src/loader/backends/jxl.c')
+   ggaze_c_args += '-DHAVE_JXL'
+   ggaze_extra_deps += jxl_dep
+endif
+if avif_dep.found()
+   ggaze_src += files('src/loader/backends/avif.c')
+   ggaze_c_args += '-DHAVE_AVIF'
+   ggaze_extra_deps += avif_dep
+endif
+if heif_dep.found()
+   ggaze_src += files('src/loader/backends/heif.c')
+   ggaze_c_args += '-DHAVE_HEIF'
+   ggaze_extra_deps += heif_dep
+endif
+
+ggaze_lib = static_library('ggaze',
+   ggaze_src,
    include_directories : [inc, src_inc],
-   dependencies : [gtk4_dep, glib_dep, gio_dep, adwaita_dep, gdkpixbuf_dep, libexif_dep],
+   dependencies : [gtk4_dep, glib_dep, gio_dep, adwaita_dep, gdkpixbuf_dep,
+      libexif_dep] + ggaze_extra_deps,
+   c_args : ggaze_c_args,
    install : false,
 )
 
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