gm: write all messages to stdout/stderr with "GM:" preamble to distinguish from various debug messa…

gm/gm.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef skiagm_DEFINED
 #define skiagm_DEFINED
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
 #include "SkPaint.h"
 #include "SkSize.h"
 #include "SkString.h"
 #include "SkTRegistry.h"
 
+// Prefix we use for each stderr line, so we can see where the messages are coming from.
+#define GM_PREAMBLE "GM: "
+
 #define DEF_GM(code) \
     static skiagm::GM*          SK_MACRO_APPEND_LINE(F_)(void*) { code; } \
     static skiagm::GMRegistry   SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
 
 namespace skiagm {
 
         static inline SkISize make_isize(int w, int h) {
                 SkISize sz;
                 sz.set(w, h);
                 return sz;
@@ skipping 71 matching lines @@
         SkString fShortName;
         SkColor  fBGColor;
         bool     fCanvasIsDeferred; // work-around problem in srcmode.cpp
         bool     fHaveCalledOnceBeforeDraw;
     };
 
     typedef SkTRegistry<GM*, void*> GMRegistry;
 }
 
 #endif