Make this work at all in macOS/Homebrew

README.adoc

@@ -18,8 +18,8 @@ a package with the latest development version from Archlinux's AUR.
 Building and Running
 --------------------
 Build dependencies: Meson, pkg-config +
-Runtime dependencies: gtk+-3.0, pixman-1, shared-mime-info, spng>=0.7.0,
-libturbojpeg, LibRaw (optional), librsvg-2.0 (optional),
+Runtime dependencies: gtk+-3.0, glib>=2.64, pixman-1, shared-mime-info,
+spng>=0.7.0, libturbojpeg, LibRaw (optional), librsvg-2.0 (optional),
 gdk-pixbuf-2.0 (optional)
 
  $ git clone --recursive https://git.janouch.name/p/fastiv.git

fastiv-io.c

@@ -18,7 +18,11 @@
 #include "config.h"
 
 #include <cairo.h>
+#include <errno.h>
 #include <glib.h>
+#include <glib/gstdio.h>
+
+#include <spng.h>
 #include <turbojpeg.h>
 #ifdef HAVE_LIBRAW
 #include <libraw.h>
@@ -44,9 +48,6 @@
 #define WUFFS_CONFIG__MODULE__ZLIB
 #include "wuffs-mirror-release-c/release/c/wuffs-v0.3.c"
 
-#include <glib/gstdio.h>
-#include <spng.h>
-
 #include "xdg.h"
 #include "fastiv-io.h"
 
@@ -495,7 +496,13 @@ open_librsvg(const gchar *data, gsize len, const gchar *path, GError **error)
 	rsvg_handle_set_dpi(handle, 96);
 
 	double w = 0, h = 0;
+#if LIBRSVG_CHECK_VERSION(2, 51, 0)
 	if (!rsvg_handle_get_intrinsic_size_in_pixels(handle, &w, &h)) {
+#else
+	RsvgDimensionData dd = {};
+	rsvg_handle_get_dimensions(handle, &dd);
+	if ((w = dd.width) <= 0 || (h = dd.height) <= 0) {
+#endif
 		RsvgRectangle viewbox = {};
 		gboolean has_viewport = FALSE;
 		rsvg_handle_get_intrinsic_dimensions(handle, NULL, NULL, NULL, NULL,
@@ -675,6 +682,10 @@ fastiv_io_open_from_data(const char *data, size_t len, const gchar *path,
 
 // --- Thumbnails --------------------------------------------------------------
 
+#ifndef __linux__
+#define st_mtim st_mtimespec
+#endif  // ! __linux__
+
 static int  // tri-state
 check_spng_thumbnail_texts(struct spng_text *texts, uint32_t texts_len,
 	const gchar *target, time_t mtime)

fastiv-view.c

@@ -18,6 +18,14 @@
 #include <math.h>
 #include <stdbool.h>
 
+#include <gtk/gtk.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif  // GDK_WINDOWING_X11
+#ifdef GDK_WINDOWING_QUARTZ
+#include <gdk/gdkquartz.h>
+#endif  // GDK_WINDOWING_QUARTZ
+
 #include "fastiv-io.h"
 #include "fastiv-view.h"
 
@@ -178,13 +186,17 @@ fastiv_view_realize(GtkWidget *widget)
 	// We need this window to receive input events at all.
 	GdkWindow *window = gdk_window_new(gtk_widget_get_parent_window(widget),
 		&attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL);
+
+	// Without the following call, or the rendering mode set to "recording",
+	// RGB30 degrades to RGB24. It completely breaks the Quartz backend.
+#ifdef GDK_WINDOWING_X11
+	if (GDK_IS_X11_WINDOW(window))
+		gdk_window_ensure_native(window);
+#endif  // GDK_WINDOWING_X11
+
 	gtk_widget_register_window(widget, window);
 	gtk_widget_set_window(widget, window);
 	gtk_widget_set_realized(widget, TRUE);
-
-	// Without the following call, or the rendering mode set to "recording",
-	// RGB30 degrades to RGB24.
-	gdk_window_ensure_native(window);
 }
 
 static gboolean
@@ -241,6 +253,12 @@ fastiv_view_draw(GtkWidget *widget, cairo_t *cr)
 	// TODO(p): Prescale it ourselves to an off-screen bitmap, gamma-correctly.
 	cairo_pattern_set_filter(pattern, CAIRO_FILTER_GOOD);
 
+#ifdef GDK_WINDOWING_QUARTZ
+	// Not supported there. Acts a bit like repeating, but weirdly offset.
+	if (GDK_IS_QUARTZ_WINDOW(gtk_widget_get_window(widget)))
+		cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE);
+#endif  // GDK_WINDOWING_QUARTZ
+
 	cairo_paint(cr);
 	return TRUE;
 }

fastiv.c

@@ -22,6 +22,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include <fnmatch.h>