ASTC Native Decoding Support

ext/decoders/native/main.c

@@ -0,0 +1,19 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <ruby.h>
+#include "astc.h"
+
+static VALUE rb_decode_astc(VALUE self, VALUE rb_data, VALUE w, VALUE h, VALUE bw, VALUE bh) {
+    const uint8_t *data = (uint8_t*)RSTRING_PTR(rb_data);
+    uint32_t *image = (uint32_t*)calloc(FIX2LONG(w) * FIX2LONG(h), sizeof(uint32_t));
+    decode_astc(data, FIX2INT(w), FIX2INT(h), FIX2INT(bw), FIX2INT(bh), image);
+    VALUE ret = rb_str_new((char*)image, FIX2LONG(w) * FIX2LONG(h) * sizeof(uint32_t));
+    free(image);
+    return ret;
+}
+
+void Init_native() {
+    VALUE mMikunyan = rb_define_module("Mikunyan");
+    VALUE mDecodeHelper = rb_define_module_under(mMikunyan, "DecodeHelper");
+	rb_define_module_function(mDecodeHelper, "decode_astc", rb_decode_astc, 5);
+}