add support for skfiddle width/height options

experimental/webtry/main.cpp

Index: experimental/webtry/main.cpp
diff --git a/experimental/webtry/main.cpp b/experimental/webtry/main.cpp
index 0a71d9613333de2f86b45fb9dd2265608ab87dda..98c2f5e4e68aa6a6421d32bb6533da005a1414e3 100644
--- a/experimental/webtry/main.cpp
+++ b/experimental/webtry/main.cpp
@@ -9,6 +9,7 @@
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkImageInfo.h"
+#include "SkOSFile.h"
 #include "SkStream.h"
 #include "SkSurface.h"
 
@@ -18,6 +19,8 @@ __SK_FORCE_IMAGE_DECODER_LINKING;
 
 DEFINE_string(out, "", "Filename of the PNG to write to.");
 DEFINE_string(source, "", "Filename of the source image.");
+DEFINE_int32(width, 256, "Width of output image.");
+DEFINE_int32(height, 256, "Height of output image.");
 
 // Defined in template.cpp.
 extern SkBitmap source;
@@ -102,14 +105,20 @@ int main(int argc, char** argv) {
     }
 
     if (FLAGS_source.count() == 1) {
-       if (!SkImageDecoder::DecodeFile(FLAGS_source[0], &source)) {
-           perror("Unable to read the source image.");
-       }
+        const char *sourceDir = getenv("WEBTRY_INOUT");
+        if (NULL == sourceDir) {
+            sourceDir = "/skia_build/inout";
+        }
+
+        SkString sourcePath = SkOSPath::Join(sourceDir, FLAGS_source[0]);
+        if (!SkImageDecoder::DecodeFile(sourcePath.c_str(), &source)) {
+            perror("Unable to read the source image.");
+        }
     }
 
     SkFILEWStream stream(FLAGS_out[0]);
 
-    SkImageInfo info = SkImageInfo::MakeN32(256, 256, kPremul_SkAlphaType);
+    SkImageInfo info = SkImageInfo::MakeN32(FLAGS_width, FLAGS_height, kPremul_SkAlphaType);
     SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
     SkCanvas* canvas = surface->getCanvas();