Prefer use of gdk_memory_texture_new() (#46)

As the gdk-pixbuf dependency is expected to be dropped in GTK5.

Author: kleisauke

src/tile.c

@@ -50,8 +50,7 @@ tile_dispose(GObject *object)
 #endif /*DEBUG*/
 
 	VIPS_UNREF(tile->texture);
-	VIPS_UNREF(tile->pixbuf);
-	VIPS_FREE(tile->data_copy);
+	VIPS_FREEF(g_bytes_unref, tile->bytes);
 	VIPS_UNREF(tile->region);
 
 	G_OBJECT_CLASS(tile_parent_class)->dispose(object);
@@ -145,31 +144,32 @@ tile_get_texture(Tile *tile)
 	 *	1. We must make a copy of the pixel data from libvips, to stop
 	 *	   it being changed under our feet.
 	 *
-	 *	2. Wrap a pixbuf around that copy.
+	 *	2. Wrap a GBytes around that copy.
 	 *
 	 *	3. Tag it as a texture that may need upload to the GPU.
 	 */
 	if (!tile->texture) {
-		VIPS_FREE(tile->data_copy);
-		tile->data_copy = g_memdup2(
+		gpointer copy = g_memdup2(
 			VIPS_REGION_ADDR(tile->region,
 				tile->region->valid.left,
 				tile->region->valid.top),
 			VIPS_REGION_SIZEOF_LINE(tile->region) *
 				tile->region->valid.height);
 
-		VIPS_UNREF(tile->pixbuf);
-		tile->pixbuf = gdk_pixbuf_new_from_data(
-			tile->data_copy,
-			GDK_COLORSPACE_RGB,
-			tile->region->im->Bands == 4,
-			8,
+		VIPS_FREEF(g_bytes_unref, tile->bytes);
+		tile->bytes = g_bytes_new_take(
+			copy,
+			VIPS_REGION_SIZEOF_LINE(tile->region) *
+				tile->region->valid.height);
+
+		tile->texture = gdk_memory_texture_new(
 			tile->region->valid.width,
 			tile->region->valid.height,
-			VIPS_REGION_LSKIP(tile->region),
-			NULL, NULL);
-
-		tile->texture = gdk_texture_new_for_pixbuf(tile->pixbuf);
+			tile->region->im->Bands == 4
+				? GDK_MEMORY_R8G8B8A8
+				: GDK_MEMORY_R8G8B8,
+			tile->bytes,
+			VIPS_REGION_LSKIP(tile->region));
 	}
 
 	return tile->texture;
@@ -184,5 +184,5 @@ tile_free_texture(Tile *tile)
 	g_assert(tile->valid);
 
 	VIPS_UNREF(tile->texture);
-	VIPS_UNREF(tile->pixbuf);
+	VIPS_FREEF(g_bytes_unref, tile->bytes);
 }

src/tile.h

@@ -70,12 +70,11 @@ typedef struct _Tile {
 
 	/* Pixels going out to the scene graph.
 	 *
-	 * pixbuf and texture won't make a copy of the data, so we must make a
+	 * bytes and texture won't make a copy of the data, so we must make a
 	 * copy ourselves, in case a later fetch from the same region produces
 	 * invalid data.
 	 */
-	VipsPel *data_copy;
-	GdkPixbuf *pixbuf;
+	GBytes *bytes;
 	GdkTexture *texture;
 
 } Tile;

src/tilecache.c

@@ -122,12 +122,6 @@ tilecache_area_changed(Tilecache *tilecache, VipsRect *dirty, int z)
 	g_signal_emit(tilecache, tilecache_signals[SIG_AREA_CHANGED], 0, dirty, z);
 }
 
-static void
-tilecache_checkerboard_destroy_notify(guchar *pixels, gpointer data)
-{
-	g_free(pixels);
-}
-
 /* Make a GdkTexture for the checkerboard pattern we use for compositing.
  */
 static GdkTexture *
@@ -159,13 +153,10 @@ tilecache_texture(TilecacheBackground background)
 				data[y * TILE_SIZE * 3 + x * 3 + z] = v;
 			}
 
-	g_autoptr(GdkPixbuf) pixbuf = gdk_pixbuf_new_from_data(data,
-		GDK_COLORSPACE_RGB,
-		FALSE, 8,
-		TILE_SIZE, TILE_SIZE, TILE_SIZE * 3,
-		tilecache_checkerboard_destroy_notify, NULL);
+	g_autoptr(GBytes) bytes = g_bytes_new_take(data, TILE_SIZE * TILE_SIZE * 3);
 
-	return gdk_texture_new_for_pixbuf(pixbuf);
+	return gdk_memory_texture_new(
+		TILE_SIZE, TILE_SIZE, GDK_MEMORY_R8G8B8, bytes, TILE_SIZE * 3);
 }
 
 static void