Added initial Netpbm image format support

core/image/netpbm/helpers.odin

@@ -0,0 +1,26 @@
+package netpbm
+
+import "core:bytes"
+import "core:image"
+
+destroy :: proc(img: ^image.Image) -> bool {
+	if img == nil do return false
+
+	//! TEMP CAST
+	info, ok := img.metadata.(^image.Netpbm_Info)
+	if !ok do return false
+
+	bytes.buffer_destroy(&img.pixels)
+	header_destroy(&info.header)
+	free(info)
+	img.metadata = nil
+
+	return true
+}
+
+header_destroy :: proc(using header: ^Header) {
+	if format == .P7 && tupltype != "" {
+		delete(tupltype)
+		tupltype = ""
+	}
+}