Fix WIC encoder to support kJPEG_Type

gm/encode.cpp

+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "gm.h"
+#include "SkCanvas.h"
+#include "SkData.h"
+#include "SkImageEncoder.h"
+#include "Resources.h"
+
+namespace skiagm {
+
+class EncodeGM : public GM {
+public:
+    EncodeGM() {}
+
+protected:
+    SkString onShortName() override {
+        return SkString("encode");
+    }
+
+    SkISize onISize() override {
+        return SkISize::Make(1024, 600);
+    }
+
+    void onDraw(SkCanvas* canvas) override {
+        SkBitmap orig;
+        GetResourceAsBitmap("mandrill_512_q075.jpg", &orig);
+        sk_sp<SkData> pngData(SkImageEncoder::EncodeData(orig, SkImageEncoder::kPNG_Type, 100));
+        sk_sp<SkData> jpegData(SkImageEncoder::EncodeData(orig, SkImageEncoder::kJPEG_Type, 100));
+
+        sk_sp<SkImage> pngImage = SkImage::MakeFromEncoded(pngData);
+        sk_sp<SkImage> jpegImage = SkImage::MakeFromEncoded(jpegData);
+        canvas->drawImage(pngImage.get(), 0.0f, 0.0f);
+        canvas->drawImage(jpegImage.get(), 512.0f, 0.0f);
+
+        const char text[] = "Images should look identical.";

[mtklein, 2016/08/15 19:50:53]

...more-or-less the same. ?

[msarett, 2016/08/15 19:58:28]

Done.

+        canvas->drawText(text, sizeof(text) - 1, 450.0f, 550.0f, SkPaint());

[mtklein, 2016/08/15 19:54:11]

It can be nice to call sk_tool_utils::set_portable_typeface() to make more GMs
similar to each other.

[msarett, 2016/08/15 19:58:28]

Done.

+    }
+
+private:
+    typedef GM INHERITED;
+};
+
+DEF_GM( return new EncodeGM; )
+}