Remove uses of SkImageDecoder from samplecode
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1812323003
Review URL: https://codereview.chromium.org/1812323003
diff --git a/samplecode/DecodeFile.h b/samplecode/DecodeFile.h
new file mode 100644
index 0000000..26d5d2d
--- /dev/null
+++ b/samplecode/DecodeFile.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkBitmap.h"
+#include "SkCodec.h"
+#include "SkData.h"
+
+inline bool decode_file(const char* filename, SkBitmap* bitmap,
+ SkColorType colorType = kN32_SkColorType, bool requireUnpremul = false) {
+ SkASSERT(kIndex_8_SkColorType != colorType);
+ SkAutoTUnref<SkData> data(SkData::NewFromFileName(filename));
+ SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(data));
+ if (!codec) {
+ return false;
+ }
+
+ SkImageInfo info = codec->getInfo().makeColorType(colorType);
+ if (requireUnpremul && kPremul_SkAlphaType == info.alphaType()) {
+ info = info.makeAlphaType(kUnpremul_SkAlphaType);
+ }
+
+ if (!bitmap->tryAllocPixels(info)) {
+ return false;
+ }
+
+ return SkCodec::kSuccess == codec->getPixels(info, bitmap->getPixels(), bitmap->rowBytes());
+}