gdk: Deprecated some pixbuf apis

These are already documented as 'don't use
in new apis'. Lets make it official and
deprecate them properly.

gdk/deprecated/gdkpixbuf.c

@@ -157,6 +157,9 @@ convert_no_alpha (guchar *dest_data,
  *
  * Returns: (nullable) (transfer full): A newly-created pixbuf with a
  *   reference count of 1
+ *
+ * Deprecated: 4.12: Use [class@Gdk.Texture] and subclasses instead
+ *   cairo surfaces and pixbufs
  */
 GdkPixbuf *
 gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
@@ -234,6 +237,9 @@ pixbuf_texture_unref_cb (guchar   *pixels,
  * to draw it on screen.
  *
  * Returns: (transfer full) (nullable): a new `GdkPixbuf`
+ *
+ * Deprecated: 4.12: Use [class@Gdk.Texture] and subclasses instead
+ *   cairo surfaces and pixbufs
  */
 GdkPixbuf *
 gdk_pixbuf_get_from_texture (GdkTexture *texture)

gdk/deprecated/gdkpixbuf.h

@@ -33,13 +33,13 @@
 
 G_BEGIN_DECLS
 
-GDK_AVAILABLE_IN_ALL
+GDK_DEPRECATED_IN_4_12
 GdkPixbuf *gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
                                         int              src_x,
                                         int              src_y,
                                         int              width,
                                         int              height);
-GDK_AVAILABLE_IN_ALL
+GDK_DEPRECATED_IN_4_12
 GdkPixbuf *gdk_pixbuf_get_from_texture (GdkTexture      *texture);
 
 G_END_DECLS

gdk/deprecated/meson.build

@@ -0,0 +1,7 @@
+gdk_deprecated_sources = [
+  'deprecated/gdkpixbuf.c',
+]
+
+gdk_deprecated_headers = [
+  'deprecated/gdkpixbuf.h',
+]

gdk/gdk.h

@@ -61,7 +61,7 @@
 #include <gdk/gdkmonitor.h>
 #include <gdk/gdkpaintable.h>
 #include <gdk/gdkpango.h>
-#include <gdk/gdkpixbuf.h>
+#include <gdk/deprecated/gdkpixbuf.h>
 #include <gdk/gdkpopup.h>
 #include <gdk/gdkpopuplayout.h>
 #include <gdk/gdkrectangle.h>

gdk/gdkcairo.h

@@ -22,7 +22,7 @@
 #endif
 
 #include <gdk/gdktypes.h>
-#include <gdk/gdkpixbuf.h>
+#include <gdk/deprecated/gdkpixbuf.h>
 #include <pango/pangocairo.h>
 
 G_BEGIN_DECLS

gdk/gdkcontentserializer.c

@@ -22,7 +22,7 @@
 #include "gdkcontentserializer.h"
 
 #include "gdkcontentformats.h"
-#include "gdkpixbuf.h"
+#include "deprecated/gdkpixbuf.h"
 #include "filetransferportalprivate.h"
 #include "gdktextureprivate.h"
 #include "gdkrgba.h"
@@ -642,7 +642,9 @@ pixbuf_serializer (GdkContentSerializer *serializer)
   else if (G_VALUE_HOLDS (value, GDK_TYPE_TEXTURE))
     {
       GdkTexture *texture = g_value_get_object (value);
+G_GNUC_BEGIN_IGNORE_DEPRECATIONS
       pixbuf = gdk_pixbuf_get_from_texture (texture);
+G_GNUC_END_IGNORE_DEPRECATIONS
     }
   else
     {

gdk/meson.build

@@ -1,3 +1,5 @@
+subdir('deprecated')
+
 gdk_public_sources = files([
   'gdk.c',
   'gdkapplaunchcontext.c',
@@ -38,7 +40,6 @@ gdk_public_sources = files([
   'gdkmonitor.c',
   'gdkpaintable.c',
   'gdkpango.c',
-  'gdkpixbuf.c',
   'gdkpipeiostream.c',
   'gdkrectangle.c',
   'gdkrgba.c',
@@ -94,7 +95,6 @@ gdk_public_headers = files([
   'gdkmonitor.h',
   'gdkpaintable.h',
   'gdkpango.h',
-  'gdkpixbuf.h',
   'gdkrectangle.h',
   'gdkrgba.h',
   'gdkseat.h',
@@ -112,8 +112,9 @@ gdk_public_headers = files([
   'gdkdragsurface.h',
 ])
 install_headers(gdk_public_headers, subdir: 'gtk-4.0/gdk/')
+install_headers(gdk_deprecated_headers, subdir: 'gtk-4.0/gdk/deprecated')
 
-gdk_sources = gdk_public_sources
+gdk_sources = gdk_public_sources + gdk_deprecated_sources
 
 gdk_private_h_sources = files([
   'gdkeventsprivate.h',