Simple PKM image decoder.

gm/etc1bitmap.cpp

 /*
- * Copyright 2013 Google Inc.
+ * Copyright 2014 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 "SkImageDecoder.h"
 #include "SkOSFile.h"
 
 namespace skiagm {
 
 /**
- *  Test copying an image from 8888 to 4444.
+ *  Test decoding an image from a PKM file and then
+ *  from compressed ETC1 data.
  */
-class CopyTo4444GM : public GM {
+class ETC1BitmapGM : public GM {
 public:
-    CopyTo4444GM() {}
+    ETC1BitmapGM() { }
+    virtual ~ETC1BitmapGM() { }
 
 protected:
-    virtual SkString onShortName() {
-        return SkString("copyTo4444");
+    virtual SkString onShortName() SK_OVERRIDE {
+        return SkString("etc1bitmap");
     }
 
-    virtual SkISize onISize() {
-        return make_isize(1024, 512);
+    virtual SkISize onISize() SK_OVERRIDE {
+        return make_isize(512, 512);
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
-        SkBitmap bm, bm4444;
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+
+        SkBitmap bm;
         SkString filename = SkOSPath::SkPathJoin(
-                INHERITED::gResourcePath.c_str(), "mandrill_512.png");
+                INHERITED::gResourcePath.c_str(), "mandrill_512.pkm");
         if (!SkImageDecoder::DecodeFile(filename.c_str(), &bm,
                                         SkBitmap::kARGB_8888_Config,
                                         SkImageDecoder::kDecodePixels_Mode)) {
             SkDebugf("Could not decode the file. Did you forget to set the "
                      "resourcePath?\n");
             return;
         }
         canvas->drawBitmap(bm, 0, 0);
-        SkAssertResult(bm.copyTo(&bm4444, kARGB_4444_SkColorType));
-        canvas->drawBitmap(bm4444, SkIntToScalar(bm.width()), 0);
     }
 
 private:
     typedef GM INHERITED;
 };
 
+}  // namespace skiagm
+
 //////////////////////////////////////////////////////////////////////////////
 
-static GM* MyFactory(void*) { return new CopyTo4444GM; }
-static GMRegistry reg(MyFactory);
-
-}
+DEF_GM( return SkNEW(skiagm::ETC1BitmapGM); )