cogl: Generate a GType for PixelFormat

So that CoglTexture uses the proper pspec type for it format property

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3357>

cogl/cogl/cogl-enum-types.c.in

@@ -0,0 +1,40 @@
+/*** BEGIN file-header ***/
+#include "config.h"
+#include "cogl/cogl-enum-types.h"
+/*** END file-header ***/
+
+/*** BEGIN file-production ***/
+
+/* enumerations from "@filename@" */
+#include "@filename@"
+
+/*** END file-production ***/
+
+/*** BEGIN value-header ***/
+GType
+@enum_name@_get_type (void)
+{
+  static size_t g_enum_type_id = 0;
+
+  if (g_once_init_enter (&g_enum_type_id))
+    {
+      static const G@Type@Value values[] = {
+/*** END value-header ***/
+
+/*** BEGIN value-production ***/
+        { @VALUENAME@, "@VALUENAME@", "@valuenick@" },
+/*** END value-production ***/
+
+/*** BEGIN value-tail ***/
+        { 0, NULL, NULL }
+      };
+      GType id;
+
+      id = g_@type@_register_static (g_intern_static_string ("@EnumName@"), values);
+
+      g_once_init_leave (&g_enum_type_id, id);
+    }
+
+  return g_enum_type_id;
+}
+/*** END value-tail ***/

cogl/cogl/cogl-enum-types.h.in

@@ -0,0 +1,27 @@
+/*** BEGIN file-header ***/
+#pragma once
+
+#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
+#error "Only <cogl/cogl.h> can be included directly."
+#endif
+
+#include "cogl/cogl-types.h"
+
+G_BEGIN_DECLS
+
+/*** END file-header ***/
+
+/*** BEGIN file-production ***/
+/* enumerations from "@basename@" */
+/*** END file-production ***/
+
+/*** BEGIN value-header ***/
+COGL_EXPORT GType @enum_name@_get_type (void) G_GNUC_CONST;
+#define COGL_TYPE_@ENUMSHORT@ (@enum_name@_get_type())
+
+/*** END value-header ***/
+
+/*** BEGIN file-tail ***/
+G_END_DECLS
+
+/*** END file-tail ***/

cogl/cogl/cogl-texture.c

@@ -40,6 +40,7 @@
 #include "cogl/cogl-bitmap.h"
 #include "cogl/cogl-bitmap-private.h"
 #include "cogl/cogl-buffer-private.h"
+#include "cogl/cogl-enum-types.h"
 #include "cogl/cogl-pixel-buffer-private.h"
 #include "cogl/cogl-private.h"
 #include "cogl/cogl-texture-private.h"
@@ -135,7 +136,7 @@ cogl_texture_set_property (GObject      *gobject,
       break;
 
     case PROP_FORMAT:
-      _cogl_texture_set_internal_format (texture, g_value_get_uint (value));
+      _cogl_texture_set_internal_format (texture, g_value_get_enum (value));
       /* Although we want to initialize texture::components according
       * to the source format, we always want the internal layout to
       * be considered premultiplied by default.
@@ -188,8 +189,8 @@ cogl_texture_class_init (CoglTextureClass *klass)
                           G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
                           G_PARAM_STATIC_STRINGS);
   obj_props[PROP_FORMAT] =
-    g_param_spec_uint ("format", NULL, NULL,
+    g_param_spec_enum ("format", NULL, NULL,
-                       COGL_PIXEL_FORMAT_ANY, G_MAXINT,
+                       COGL_TYPE_PIXEL_FORMAT,
                        COGL_PIXEL_FORMAT_ANY,
                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
                        G_PARAM_STATIC_STRINGS);

cogl/cogl/cogl.h

@@ -85,6 +85,7 @@
 #include "cogl/cogl-atlas-texture.h"
 #include "cogl/cogl-meta-texture.h"
 #include "cogl/cogl-primitive-texture.h"
+#include "cogl/cogl-enum-types.h"
 #include "cogl/cogl-index-buffer.h"
 #include "cogl/cogl-attribute-buffer.h"
 #include "cogl/cogl-indices.h"

cogl/cogl/meson.build

@@ -18,7 +18,6 @@ cogl_headers = [
   'cogl-pipeline-layer-state.h',
   'cogl-pipeline-state.h',
   'cogl-pipeline.h',
-  'cogl-pixel-format.h',
   'cogl-snippet.h',
   'cogl-texture-2d-sliced.h',
   'cogl-texture-2d.h',
@@ -356,7 +355,26 @@ if have_egl_xlib
   ]
 endif
 
+cogl_enum_headers = [
+  'cogl-pixel-format.h',
+]
+
+cogl_headers += [
+  cogl_enum_headers,
+]
+
+cogl_enums = gnome.mkenums('cogl-enums',
+         sources: cogl_enum_headers,
+      c_template: 'cogl-enum-types.c.in',
+      h_template: 'cogl-enum-types.h.in',
+     install_dir: cogl_cogl_includedir,
+  install_header: true,
+)
+
+cogl_sources += [cogl_enums[0]]
+
 cogl_introspected_headers = [
+  cogl_enums[1],
   cogl_headers,
   cogl_deprecated_headers,
 ]