texture: Expose subclasses as subclasses

This is necessary so that bidnings work properly and don't make
gdk_gl_texture_release() a function on GdkTexture.
It also allows code to identify what type of texture they are dealing
with.

Finally, we can now decide to add getters later without screwing
anything up, if we want to allow people to access GL textures directly.

docs/reference/gdk/gdk4-sections.txt

@@ -751,6 +751,16 @@ gdk_texture_get_type
 GDK_TYPE_TEXTURE
 GDK_IS_TEXTURE
 GDK_TEXTURE
+GdkGLTextureClass
+gdk_gl_texture_get_type
+GDK_TYPE_GL_TEXTURE
+GDK_IS_GL_TEXTURE
+GDK_GL_TEXTURE
+GdkMemoryTextureClass
+gdk_memory_texture_get_type
+GDK_TYPE_MEMORY_TEXTURE
+GDK_IS_MEMORY_TEXTURE
+GDK_MEMORY_TEXTURE
 </SECTION>
 
 <SECTION>

gdk/gdkgltexture.c

@@ -133,28 +133,26 @@ gdk_gl_texture_get_id (GdkGLTexture *self)
 
 /**
  * gdk_gl_texture_release:
- * @texture: a #GdkTexture wrapping a GL texture
+ * @self: a #GdkTexture wrapping a GL texture
  *
- * Releases the GL resources held by a #GdkTexture that
- * was created with gdk_texture_new_for_gl().
+ * Releases the GL resources held by a #GdkGLTexture that
+ * was created with gdk_gl_texture_new().
  *
  * The texture contents are still available via the
  * gdk_texture_download() function, after this function
  * has been called.
  */
 void
-gdk_gl_texture_release (GdkTexture *texture)
+gdk_gl_texture_release (GdkGLTexture *self)
 {
-  GdkGLTexture *self;
   GdkWindow *window;
+  GdkTexture *texture;
   cairo_t *cr;
 
-  g_return_if_fail (GDK_IS_GL_TEXTURE (texture));
-
-  self = GDK_GL_TEXTURE (texture);
-
+  g_return_if_fail (GDK_IS_GL_TEXTURE (self));
   g_return_if_fail (self->saved == NULL);
 
+  texture = GDK_TEXTURE (self);
   self->saved = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
                                             texture->width, texture->height);
 
@@ -178,7 +176,7 @@ gdk_gl_texture_release (GdkTexture *texture)
 }
 
 /**
- * gdk_gl_texture_new: (constructor)
+ * gdk_gl_texture_new:
  * @context: a #GdkGLContext
  * @id: the ID of a texture that was created with @context
  * @width: the nominal width of the texture

gdk/gdkgltexture.h

@@ -23,11 +23,23 @@
 #error "Only <gdk/gdk.h> can be included directly."
 #endif
 
-#include <gdk/gdktypes.h>
 #include <gdk/gdkglcontext.h>
+#include <gdk/gdktexture.h>
 
 G_BEGIN_DECLS
 
+#define GDK_TYPE_GL_TEXTURE (gdk_gl_texture_get_type ())
+
+#define GDK_GL_TEXTURE(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_GL_TEXTURE, GdkGLTexture))
+#define GDK_IS_GL_TEXTURE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_GL_TEXTURE))
+
+typedef struct _GdkGLTexture            GdkGLTexture;
+typedef struct _GdkGLTextureClass       GdkGLTextureClass;
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GdkGLTexture, g_object_unref)
+
+GDK_AVAILABLE_IN_ALL
+GType                   gdk_gl_texture_get_type                (void) G_GNUC_CONST;
 
 GDK_AVAILABLE_IN_ALL
 GdkTexture *            gdk_gl_texture_new                     (GdkGLContext    *context,
@@ -38,7 +50,7 @@ GdkTexture *            gdk_gl_texture_new                     (GdkGLContext
                                                                 gpointer         data);
 
 GDK_AVAILABLE_IN_ALL
-void                    gdk_gl_texture_release                 (GdkTexture      *texture);
+void                    gdk_gl_texture_release                 (GdkGLTexture    *texture);
 
 
 G_END_DECLS

gdk/gdkgltextureprivate.h

@@ -7,10 +7,6 @@
 
 G_BEGIN_DECLS
 
-#define GDK_TYPE_GL_TEXTURE (gdk_gl_texture_get_type ())
-
-G_DECLARE_FINAL_TYPE (GdkGLTexture, gdk_gl_texture, GDK, GL_TEXTURE, GdkTexture)
-
 GdkGLContext *          gdk_gl_texture_get_context      (GdkGLTexture           *self);
 guint                   gdk_gl_texture_get_id           (GdkGLTexture           *self);
 

gdk/gdkmemorytexture.h

@@ -86,6 +86,20 @@ typedef enum {
 #error "Unknown byte order for GDK_MEMORY_DEFAULT"
 #endif
 
+#define GDK_TYPE_MEMORY_TEXTURE (gdk_memory_texture_get_type ())
+
+#define GDK_MEMORY_TEXTURE(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_MEMORY_TEXTURE, GdkMemoryTexture))
+#define GDK_IS_MEMORY_TEXTURE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_MEMORY_TEXTURE))
+
+typedef struct _GdkMemoryTexture        GdkMemoryTexture;
+typedef struct _GdkMemoryTextureClass   GdkMemoryTextureClass;
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GdkMemoryTexture, g_object_unref)
+
+
+GDK_AVAILABLE_IN_ALL
+GType                   gdk_memory_texture_get_type         (void) G_GNUC_CONST;
+
 GDK_AVAILABLE_IN_ALL
 GdkTexture *            gdk_memory_texture_new              (int                width,
                                                              int                height,

gdk/gdkmemorytextureprivate.h

@@ -31,10 +31,6 @@ G_BEGIN_DECLS
 
 #define GDK_MEMORY_CAIRO_FORMAT_ARGB32 GDK_MEMORY_DEFAULT
 
-#define GDK_TYPE_MEMORY_TEXTURE (gdk_memory_texture_get_type ())
-
-G_DECLARE_FINAL_TYPE (GdkMemoryTexture, gdk_memory_texture, GDK, MEMORY_TEXTURE, GdkTexture)
-
 GdkMemoryFormat         gdk_memory_texture_get_format       (GdkMemoryTexture  *self);
 const guchar *          gdk_memory_texture_get_data         (GdkMemoryTexture  *self);
 gsize                   gdk_memory_texture_get_stride       (GdkMemoryTexture  *self);

gtk/gtkglarea.c

@@ -386,7 +386,7 @@ delete_one_texture (gpointer data)
   Texture *texture = data;
 
   if (texture->holder)
-    gdk_gl_texture_release (texture->holder);
+    gdk_gl_texture_release (GDK_GL_TEXTURE (texture->holder));
 
   if (texture->id != 0)
     {