convert cocoa frontend to bitmap operation table

cocoa/NetsurfApp.m

@@ -24,6 +24,7 @@
 #import "cocoa/SearchWindowController.h"
 #import "cocoa/selection.h"
 #import "cocoa/fetch.h"
+#import "cocoa/bitmap.h"
 
 #import "utils/filename.h"
 #import "utils/log.h"
@@ -220,7 +221,8 @@ int main( int argc, char **argv )
 		.clipboard = cocoa_clipboard_table,
 		.download = cocoa_download_table,
 		.fetch = cocoa_fetch_table,
-        .search = cocoa_search_table,
+		.search = cocoa_search_table,
+                .bitmap = cocoa_bitmap_table,
 	};
 
 	cocoa_autorelease();

cocoa/bitmap.h

@@ -21,4 +21,6 @@
 
 CGImageRef cocoa_get_cgimage( void *bitmap );
 
-#endif
+struct gui_bitmap_table *cocoa_bitmap_table;
+
+#endif

cocoa/bitmap.m

@@ -215,3 +215,19 @@ static CGImageRef cocoa_prepare_bitmap( void *bitmap )
 	return result;
 }
 
+static struct gui_bitmap_table bitmap_table = {
+	.create = bitmap_create,
+	.destroy = bitmap_destroy,
+	.set_opaque = bitmap_set_opaque,
+	.get_opaque = bitmap_get_opaque,
+	.test_opaque = bitmap_test_opaque,
+	.get_buffer = bitmap_get_buffer,
+	.get_rowstride = bitmap_get_rowstride,
+	.get_width = bitmap_get_width,
+	.get_height = bitmap_get_height,
+	.get_bpp = bitmap_get_bpp,
+	.save = bitmap_save,
+	.modified = bitmap_modified,
+};
+
+struct gui_bitmap_table *cocoa_bitmap_table = &bitmap_table;