add ASTC/HDR support and improve ImageDecoder

2019-12-10 04:25:58 +09:00
parent e1ac05e540
commit bd4b10f871
11 changed files with 1745 additions and 622 deletions
@@ -0,0 +1,25 @@
+#include <ruby.h>
+
+/* https://github.com/ruby/ruby/blob/master/siphash.c */
+
+#ifdef _WIN32
+#define BYTE_ORDER __LITTLE_ENDIAN
+#elif !defined BYTE_ORDER
+#include <endian.h>
+#endif
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN __LITTLE_ENDIAN
+#endif
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN __BIG_ENDIAN
+#endif
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define IS_LITTLE_ENDIAN 1
+#define IS_BIG_ENDIAN 0
+#elif BYTE_ORDER == BIG_ENDIAN
+#define IS_LITTLE_ENDIAN 0
+#define IS_BIG_ENDIAN 1
+#else
+#error "Only strictly little or big endian supported"
+#endif